Slewing ring in the production process

Whether in any industry, or any mechanical parts, we are most concerned about is the safety issue. Especially slewing not only can be used in machinery and equipment, also used in military, aviation, playground, so that the security of slewing ring is very important.
Orson Xuzhou Slewing introduction: We do not worry about the safety of Slewing bearing, angular contact ball bearing  in the machinery because there is a significant role, so the production of slewing ring has strict requirements. Inspections in the slewing ring is checked through a number of technical personnel, qualified to sell the factory. If you still worried about the safety of slewing ring, everyone at the time of purchase can also choose reputable manufacturers.Orson Xuzhou Slewing description: slewing ring has a high quality of protection, because slewing ring to withstand mechanical steering force, so strict rules slewing ring must reach a certain size, if any, does not reach the required product is not for sale . While slewing start small friction coefficient, consumption is small, can be applied in hot or cold places, and there are very high hardness.

Tapered roller bearings noise is normal phenomenon it

In fact, many people may have found the problem, when turning on the machine, we can hear from the bearing raceway loud noise, so we were a bit worried that the machine is not what's wrong, ah still not normal. In fact, we do not have to worry too much about this issue, under normal circumstances, like some of the seven types of bearing manufacturer will issue a rolling sound of 30 decibels, and it is the noise characteristics and regularity, the first noise it emits sound and not every time, is a variety of random sounds, because the tapered roller bearing each machine running speed and various other factors that are not fixed, so the sound is not the same. But no matter what changes speed, the noise is almost constant while the main frequency sound pressure level is increased with the increase with the speed, when the bearing raceways total sound pressure level is lower, even if the speed increases, the total sound pressure level also increased little, overall, in slewing bearing noise is a normal thing, do not worry too much.

A belt driven wheel drive continuously variable transmission device structure

The utility model discloses a belt drive continuously variable transmission device of the driven wheel structure. The angular contact ball bearing portion of the driven wheel outer face last week triangular projections uniformly distributed, power output shaft through the cylindrical wall of the sleeve shaft seat chamber and the axial end surface of the bore hole and the circumferential surface of the shaft fixedly connected with the cavity, compression spring driven wheel mounted on the movable portion between the seat and the sleeve,bearing ball the sleeve wall is provided with a cylindrical seat number and the same number of triangular projections gap, the shape of the cylindrical wall was the same after the commencement of an equilateral triangle, the triangle notch projection engagement. The utility model to overcome the existing technical main driven wheel movement and often can not keep pace reducers defects have avoided belt slippage, high transmission efficiency and transmission characteristics of large capacity.

Rolling mill bearing Also known as induction heating power induction heater

Rolling mill bearing Also known as induction heating power induction heater, also known as induction heating equipment, all collectively work piece is heated both involve induction heating include: induction heating power supplies, induction heating equipment, roughness measuring instrument  bearing heater, bearing induction heater, including industrial after preheating induction heating power supply piping hot, Evaporation, copper brazing used, the basic working principle is to use alternating current generates an alternating magnetic field, the alternating magnetic field which is generated inside the metal conductor eddy (eddy current),   heat rapidly so that the metal of the workpiece, in general, the heating effect, there is a frequency, a current, a magnetic field joint decision.
In induction heating, the temperature rise of the workpiece to be heated is a metal part, there will be induced heat the heater itself, most of the work to be induced through the use of cooling water to cool the heated portion of the workpiece is not a non-metallic heat .

Precision bearings in accordance with the ISO classification standard

precision bearing in accordance with the classification standards ISO divided into:. P0, P6, P5, P4, P2 grade increased sequentially, which is normal precision P0, other grades are precision level. Of course, different grading standards, different types of bearings, their grading methods are different, but the meaning is the one to. super-precision bearing performance requirements on a rotating body having high runout accuracy, high-speed rotation and low friction and friction change.

problems consumers rated the highest

problems consumers rated the highest, angular contact thrust ball bearing accounted for 10.1%, mainly reflected in the plate is thin, key sensitivity; the noise problem is very serious, bad review accounted for 3.7%; workmanship bad review mainly concentrated in the sealing is poor, rough surface, screw not firm, 3.4%. Therefore, enterprises should pay attention to strengthen the quality of products, improve the comprehensive competition strength. Quality integrated stove products is the most let consumers headache. According to the results of Oviedo (AVC) semantic analysis system show that the second half of 2014, sealed angular contact ball bearing ,the online consumer groups are not satisfied with the online integrated stove place is mainly reflected in the product installation and logistics and distribution, bad review accounted for 24.4% and 23.5%, and the product itself dissatisfaction is higher, the difference comments accounted for 17.1%. Among them, the quality (including material, safety, display, keys etc.)

Rotating rings blanch the amount of interference to the extent possible should also get smaller

Rotating rings blanch the amount of interference to the extent possible should also get smaller. As long as the operating temperature and ensure the effect of thermal expansion, and the maximum Bearing manufacturing machine speed of the centrifugal force, resulting in a tight fit so as not to creep or sliding surfaces. Fixed ring size according to the work load and bearing size, select small clearance fit or interference fit, too loose or too tight is not conducive to maintaining the original shape exactly.roller bearing measurement ring on the shaft or housing rotation; overload large; bearing cage or rolling fragmentation.1), the shaft and housing bore roundness and the vertical shoulder block bearing according to the appropriate precision requirements.2), it is necessary to accurately calculate the rotating rings fit the amount of interference, but also suitable for accurate calculation of the amount of the fixed ring.

Tapered outer spherical ball bearings

Codename: UK200 series, UK300 series. Such spherical ball bearing bore ratio of 1:12 taper hole, used to be used in conjunction with the adapter sleeve, insert ball bearing such features as: affordable than with the top wire spherical ball bearings more load. Because of its tight fit with the inner diameter of the sleeve than the model with the top wire spherical ball bearings smaller, such as with an inner diameter of the top wire spherical ball bearings UC209 is 45mm, the diameter of its axis is compatible with the use of 45mm, and if if replaced with a tapered, spherical ball bearings, you can only choose an inner diameter of 45mm of tight sets, but not with 45mm adapter sleeve fit tapered, Ceramic Ball Bearings only UK210 (of course if the load higher, then you can choose UK310's). Thus, UK210 the load on when to make a much larger than the UC209 more.

You can use ceramic can be achieved without self-lubricating

Bearing seals designed to prevent leakage of the lubricant inside the bearing parts, and to prevent harmful objects outside dust, moisture and foreign matter that penetrates into the bearing, so bearings can be lubricated to the oil in place Analysis of sealed bearings Sealed bearings can be separated from the inner ring and roller assembly and the outer ring with the composition of the cage can be installed separately. Roller and raceway contact at the contact line can be modified to reduce the stress concentration. Tapered roller bearings can withstand high radial and axial load. Because of the tapered roller bearing axial load can only pass one way, therefore, to pass in the opposite direction of the axial load will need to install another with symmetrical Tapered Roller Bearings.
Most of the amount of sealed bearings are single row tapered roller bearings. In the car's front wheels in recent years to spend the small size of the sealed angular contact ball bearing. Four-row tapered roller bearings used in large-scale cold rolling mill and other heavy machines.

Deep groove ball bearing are bearing the most common type

Deep groove ball bearing are bearing the most common type. The basic model consists of a deep groove ball bearing outer ring, an inner ring, a steel ball and a group of holding structure into. Deep groove ball bearing type has two kinds of single and double row deep groove ball structure also split seal and open two structures, open means bearing structure without seals, insert ball bearingseal deep groove ball into dust seal and oil seal.
Deep groove ball bearings mainly take radial load, but also to support radial and axial load. When the only radial load, the contact angle is zero. When the deep groove ball bearings with a larger radial clearance, the performance with angular contact bearings, can withstand greater axial load, deep groove ball bearing friction coefficient is small, speed is also very high.

Precision bearings in accordance with the ISO classification standard

precision bearing in accordance with the classification standards ISO divided into:. P0, P6, P5, P4, P2 grade increased sequentially, which is normal precision P0, other grades are precision level. Of course, different grading standards, different types of bearings, their grading methods are different, but the meaning is the one to. super-precision bearing performance requirements on a rotating body having high runout accuracy, high-speed rotation and low friction and friction change.
Since precision bearings themselves accuracy 1μm or less, thus requiring its matching parts (shaft, bearing, cap, ring, etc.) have a high dimensional accuracy and shape accuracy, especially to control the accuracy of the mating surfaces and bearing the same horizontal, which is crucial, but also the most easily overlooked.

Bearing the measurement definition

bearing measurement outer diameter, diameter size, height, which is the basic of the three dimensions was detected. Usually with a caliper and micrometer, or folders on the dial indicator gauge blocks, accurate point. With an inner diameter of the instrument can be beat and the outer diameter of the bearing runout. The main instruments for detecting bearing accuracy class enough.
Entity One way bearing GCr15 bearing steel, heat-treated hardness HRC61-65, bearing small size and high load carrying capacity, there is sufficient space to store the grease, may have come a long lubrication intervals.

Rolling mill bearingtechnology, is a systems engineering technology

Rolling mill bearingtechnology, is a systems engineering technology, and also the multidisciplinary field of comprehensive engineering technology, its development speed and ability to support the formation of a reflection of the pace of development of Chinese industry and the level achieved. Hereby briefly discusses several key aspects from running technology, manufacturing technology, testing technology, theoretical research, product development, complete sets of capacity.
Development of oil film bearing main parts, began in the late 1950s,aviation bearing in the case of a no pattern, nor information, three non-proprietary equipment carried. Development of oil film bearing the main parts, and easy, from material selection, process route, processing methods to special tooling design and manufacturing has a set of working procedures. From the choice of materials, taking into account the drogue and friction material pairing, drogue forging process of combining steel bushing sleeve and friction materials, steel sleeve process

Mill Bearing Testing Technology

It consists of two parts: one to measure the technical parts processing, and another part of the experimental research of measurement techniques.
Due to the high precision four row cylindrical roller bearing the main parts, require accurate measurement and fast. To meet this requirement, the first to have high-precision measuring instruments (a) and with the support of auxiliary equipment (a), while the measure of quality control and post-processing of the measurement process is completed, it is necessary to perform scientific measurements methods and have the technical skill. To this end, in addition to the purchase, custom precision measuring instruments (a), but also the design, manufacture of special equipment (a) and accompanied by the implementation of a scientific measurement methods and procedures. This ensures that the measurement repeatability, high precision.
To better understand the situation when the oil film bearing operating parameters, and to explore the regularity, Taiyuan Heavy Machinery Factory since 1972 has done a lot of lab bench to measure and our row cylindrical roller bearings in actual work of running the load, rotation, power, oil and other measurements external internal parameters. Test range, including the film pressure field, film thickness field and temperature field inside the bearing oil film work area, etc., the field of the measurement of these unconventional nature, from the measurement sensor to the secondary instrument, no ready to buy.
So, to its own research. Taiyuan Heavy Machinery Factory as the main strength of the laboratory, built a professional test team, with Tsinghua University and other units of the joint research, carried out research, development work testing techniques and instrumentation, we have conducted a resistive, inductive, capacitive and Eddy Current Testing Technology and a secondary instrument of research and development, and succeeded in obtaining a large amount of data, good repeatability, regularity, high measurement accuracy. Meanwhile, also on related technologies, including calibration, interference, signal delivery rotation, and simultaneous measurement of multiple signals, recording and printing were studied and applied.

Mill Bearing Operation Technology

Including oil film Cross roller bearing parts store, cleaning, installation, commissioning, operation, maintenance, diagnosis, management, a set of knowledge and skills. Correct use of running technology, is a reliable guarantee for the safe operation of the bearing.
The early 1950s, China's only Angang cold rolling mill oil film bearing reversing mill equipment. Its operation and management, in full accordance with the relevant regulations of the Soviet Union was. The traditional process, the pressure is not rolling, rolling speed is low, the lubrication system is also very simple to run skill levels are relatively low. But in actual operation, the relevant management and technical personnel and operations workers work very seriously, in strict accordance with procedures to do, accumulated use, maintenance experience.
However, due to lack of understanding of the Four-Row Cylindrical Roller Bearing works, some less sensible procedure has been followed for almost two years, for example, after bearing parts installed, do pressure test 35N / cm2, if the oil spill, which tighten rotary sealing, until no leakage so far. However, such a pressure test after adjustment, the effect is not good to use, but, seal life is short. This seal is with the skeleton of "J" type seal, is to rely on lip seal, pressure test immediately after the transfer, it is no longer lips sealed, but a stubbornly clinging to the surface of the sealing strip rotation. But after all fundamental, successfully run oil film bearing, or start from here.

Mill Bearing process

Design issues Four-Row Tapered Roller Bearings burning and many other factors, generally normal, and typical aluminum foil rolling mill angular contact bearings burning is a worldwide problem, which I personally think is very important lubricating oil mist lubrication slightly better point, there bearing mounting clearance problems.
In addition there are a number of factors baffle shaft and the bearing clearance problems, but also bending load bearing outer cylinder to bring change issues and so on, foreign SMS mills produced by the SKF bearings tapered and thrust bearings ʱ?? Also bearing outer ring spring buffers and the like.
1. The support is generally used in four-row cylindrical roller small roller bearings, the inner interference fit with the roll, installed after the general sleeve, fitted into the inner ring, within the ring as a benchmark cylindrical grinding roll, because it can not afford axis force, axial force generated during the Rolling mill bearings need to bear, it is generally used in a double row angular contact four row cylindrical roller bearings back to back, face to face with the double row tapered roller bearings, and thrust bearings and four-point angular contact ball bearings , domestic manufacturers Wazhou product better, foreign manufacturers are willing to better the parent of American Railroads.
2. Work roll bearings generally use four-row tapered roller bearings, its structure, its inner circle is moving with the roll, that is to say when the roll regrinding, bearing along with the bearing together removed itself bear certain axis force, so some small mills axial force is its own bear, and some larger, or high precision rolling mill, generally using axial force bearing.

Keep Rolling mill bearings

Cross roller bearings is a precision mechanical components, their storage and safekeeping have more stringent requirements.

(1) Storage Temperature: front bearing factory are coated with anti-rust oil temperature is too low or too high will lead to deterioration of anti-rust oil, room temperature should be controlled at 0-25 ℃.

(2) Storage humidity: excessive humidity can cause corrosion of bearings, the relative humidity in the warehouse should be kept to 45% -60%.

(3) warehouse environments: Four-Row Tapered Roller Bearings best kept separate when stored must be shared with other items, other items must not be stored with acids, bases, salts and other chemicals. Bearings should be placed off the ground, away from the heating pipes.

(4) periodic inspection: according to the provisions bearings rust, every 10-12 months, regularly check again. If it is found rusting seal packaging, should be re-seal packaging.

Keep Rolling mill bearings

Cross roller bearings is a precision mechanical components, their storage and safekeeping have more stringent requirements.

(1) Storage Temperature: front bearing factory are coated with anti-rust oil temperature is too low or too high will lead to deterioration of anti-rust oil, room temperature should be controlled at 0-25 ℃.

(2) Storage humidity: excessive humidity can cause corrosion of bearings, the relative humidity in the warehouse should be kept to 45% -60%.

(3) warehouse environments: Four-Row Tapered Roller Bearings best kept separate when stored must be shared with other items, other items must not be stored with acids, bases, salts and other chemicals. Bearings should be placed off the ground, away from the heating pipes.

(4) periodic inspection: according to the provisions bearings rust, every 10-12 months, regularly check again. If it is found rusting seal packaging, should be re-seal packaging.

Mill bearing Manufacturing Technology

Development of oil film Four-Row Taper Roller Bearing main parts, began in the late 1950s, in the case of a no pattern, nor information, three non-proprietary equipment carried. Development of oil film bearing the main parts, and easy, from material selection, process route, processing methods to special tooling design and manufacturing has a set of procedures. From the choice of materials, taking into account the friction pairing sleeve material, drogue process of forging, steel sleeve and liner combination of process steel sleeve friction material; from the process line, to meet the cone, bush of the technical requirements, but also use the existing processing equipment, which in itself requires a good combination of theory and practice, for example, the inner surface of the steel jacket of how physical (including machining) and chemical treatment in order to increase the binding force ; in the processing method, we know, it is the civilian liner sleeve and the highest precision, surface roughness sleeve Ra0.05μm (bush is Ra0.2μm), high precision geometric deformation is difficult to control, surface roughness low, the need for super-finishing, the surface does not allow multiple prism, spiral, chatter and the like; design and manufacture of special tooling, is also very important, it is to achieve processing methods to ensure that critical machining accuracy.
Early 1960s, completed the development of the film Four-Row Cylindrical Roller Bearing the main parts of general machine tools manufacturing. The late 1960s, Taiyuan Heavy Machinery Factory built a rolling mill oil film bearing specialized production workshop, and began manufacturing rolling mill oil film bearing of the whole of the New.

Principle Rolling mill bearings

four row cylindrical roller bearings is used for roll neck metallurgy, mining and other rolling mill stand, roller bearings used. Usually cylindrical roller bearings under radial load, deep groove ball bearings or angular contact ball bearings, thrust or radial design or design of the tapered roller bearing axial load. Now they use oil mist lubrication oil lubrication or cooling lubricant bearing manner. Principle folded edit this section
Oil film four row cylindrical roller bearing technology, is a systems engineering technology, and also a multi-disciplinary comprehensive engineering technology, its development speed and the ability to support the formation of a reflection of the pace of development of Chinese industry and the level achieved. Have a brief discussion of the main aspects operation technology, manufacturing technology, testing technology, theoretical research, product development, complete sets of capacity

Rolling type selection

A According to the bearing load size, direction and nature
①, when the load is small and stable, it is appropriate roller bearings.
②, when the bearing is only subjected to radial load, the choice of radial ball bearings or radial cylindrical roller bearings; when the bearing is only subjected to axial load, thrust ball bearings can be used.
③, when the Bearing life testing machine is simultaneously subjected to axial load and radial load, and radial load should load A relative value R of an axial considered.
When R A is smaller than a lot of the time, the choice of radial ball bearings.
b when A <R, the selection of angular contact ball bearings or tapered roller bearings.
c when the A> R, the choice of the contact angle of the cone large angular contact ball bearings and a large cone angle roller bearings.
d When A much larger than R, it can be thrust and radial bearings used in combination, respectively axial and radial loads.
B according to the speed of the bearing
1, when the size, with the same precision, limit ball bearing roller bearing ratio is high, so the ball bearing is easy for high speed shaft.
2, by the axial load greater speed shaft, the best selection of angular contact ball bearings, thrust ball bearings rather than choice. Due to high speed, the centrifugal force of the rolling elements great bearing worsen working conditions.
C - Particular requirements for bearings
The radial dimensions of the components is limited and radial load and a great time, the selection of needle roller bearings.

Advantages of hybrid bearings

Hybrid ceramic bearings may be less common, and hybrid ceramic bearings are mainly configured by the inner and outer rings of bearing steel / stainless steel + ceramic balls + PA66 / stainless steel holder + 2RS / ZZ combination. Hybrid ceramic bearing has the following four advantages during use.
(1), high temperature, thermal expansion coefficient ceramic ball at high temperature because of the temperature of the environment will not lead to bearing balls swell, thereby greatly enhancing the overall bearing temperature, plain Sealed bearings temperature of about 160 degrees, with ceramic balls You can reach more than 220 degrees.
(2), high speed ceramic ball with no self-lubricating properties, low coefficient of friction ceramic balls, so ceramic ball bearings with high speed. Count statistics with ceramic ball bearings are generally bearing speed 1.5 times more speed.
(3), long life, with ceramic balls can not add any oil, grease means that even kill, the bearing can still operate, thus avoiding the occurrence of fat to get rid of because of premature bearing damage caused by the phenomenon of ordinary bearing. According to us ceramic ball bearing life after testing and feedback of some customers is 2-3 times the normal bearing.
(4), insulated with ceramic ball bearings, can make between the inner and outer ring of the bearing insulation, because the ceramic balls is an insulator between the inner and outer rings of bearings with ceramic balls, you can achieve an insulating effect. This enables Dental bearing It can be used in a conductive environment. This is the biggest advantage of hybrid ceramic bearings.

High temperature bearings and plain bearings are different models. Usually two cases:

1. super-precision bearing parts bearing steel tempered by a high temperature, then set code required to JB / T2974 (the part by tempering at high temperatures, the working temperature of up to 150C °, which code for the / S0; parts through hot temperatures, the working temperature of up to 200 ° C, which code for the / S1; parts tempered at high temperature, the working temperature up to 250 ° C, which code for the / S2; parts tempered at high temperature, work temperatures up to 300 ° C, which code for the / S3; parts tempered at high temperature, the working temperature up to 350 ° C, which code for the / S4).
2. Ball screw support bearing parts made of heat resistant steel, then set code required to JB / T2974 (the material is Cr4Mo4V, then set code is / HN; material Cr14Mo4, then set code is / HN1; material Cr15Mo4V, then set code is / HN2; material W18Cr4V, then set codenamed / HN3).

Precision Cylindrical Roller Bearings

In the machine tool spindle applications, double row precision cylindrical roller bearings will be used to generally contact ball bearings or turbocharger bearings and precision angular composite applications. These bearings can withstand greater radial load and allows a higher speed. Bearing in two rows of rollers arranged in a cross pattern, rotation fluctuation frequency significantly higher than Four-Row Tapered Roller Bearings, amplitude reduced by 60% to 70%. Such bearings generally come in two forms: NN30, NN30K two series bearing inner ring with ribs, outer ring separable; NNU49, NNU49K two series bearing outer ring with ribs, separable inner ring, which NN30K and NNU49K series inner ring tapered bore (taper 1:12), with the tapered journal spindle with axial movement inner ring, the inner ring can swell, so the bearing clearance can be reduced even bearing preload (negative clearance state). Cylindrical bore bearings usually thermal loading, using an interference fit reduced bearing clearance, or preload the bearings. NNU49 inner ring separable bearings, usually mounted on the inner shaft and then to finish the race in order to improve the accuracy of spindle rotation.

Ball bearing and oil bearing

Ball bearing and oil bearing


Ball bearing changed the bearing friction, rolling friction is adopted, the more effectively reduces the friction phenomenon between the bearing surface, sealed angular contact ball bearing effectively enhance the service life of the fan bearing, and therefore will prolong the service life of the radiator.

The disadvantage is that the process is more complex, resulting in higher cost, but also bring higher working noise.

Oil bearing sleeve bearing is to use sliding sleeve bearings, using oil as a lubricant and drag reduction agent, angular contact thrust ball bearing the initial use of operation low noise, low manufacture cost, but the bearing wear serious, life is ball bearing has a big gap.

Special combination bearings of machine turntable

Turntable bearing CNC machine tools and machining centers as an important component parts, its performance directly affects the positioning accuracy and machining accuracy of the workpiece, the bearing structure of complex, high-tech and difficult process, ZYS an earlier successful development of such high-precision bearings products in the domestic manufacturers.

Turntable bearing has two types, one is thrust / radial bearings that single row cylindrical roller bearings and thrust cylindrical roller bearing. The other is a two-way angular contact thrust ball bearing . Currently, sealed angular contact ball bearing the turntable bearing rotary table machine, indexing plate, etc. are basically used axial / radial bearings.

Why two way thrust angular contact ball bearing can't bear radial load?

By the two axis ring, a seat ring, a sleeve, surface profile measurement ,two sets of roller and cage assembly. The thickness of the grinding sleeve can adjust the preload of the bearing.

The nominal contact angle of the bearing is 60 degree, which can bear the large axial load, and the axial rigidity is high.

The nominal diameter of the contact ball bearing and the outside diameter of the double row cylindrical roller bearing are same, sealed angular contact ball bearing but the deviation is small, so the fit of the hole of the box is in a certain gap. Therefore, the two-way thrust angular contact ball bearing can not bear radial load.

Rolling bearing accelerated life testing machine

This paper summarizes the status and development of rolling bearing accelerated life testing machine and the test technology. Discusses the design of life testing, analysis and processing, the life test data. In the eleven five China bearing industry development planning, key requirements carried out to improve the bearing life and reliability engineering technology research. Low cycle load, high speed bearing ,the traditional bearing life test method of high speed, high cost and reliability of test results. And strengthen test while maintaining contact fatigue failure mechanism of the same premise. Shorten the test time.

Reduces the test cost, thus speeding up the development cycle in the product and improve the pace, angular contact thrust ball bearing ,so the accelerated bearing life test has attracted more and more attention, research and application.

Wazhou wind power spindle bearing testing machine Chinese Patent Excellence Award

Recently, the State Intellectual Property Office and the WIPO jointly held the 16th China Patent Awards announced in Beijing, surface profile measurement ZWZ wind power spindle bearing testing machine technology by China Patent Excellence Award. This means that the market value of this technique has been nationally recognized.

According to the Institute of wind power bearing ZWZ engineering and technical personnel Lin Tian introduced WBGC wind power spindle bearing testing machine first of its kind in the country. As the domestic wind turbine supporting spindle bearings imported products, roughness measuring instrument ,domestic enterprises that type of bearing bearing design, manufacturing technology is relatively backward, especially the lack of independent testing machine is a major bottleneck.

In recent years, ZWZ spindle bearings through the development of wind turbine test methods and platforms to build fan support spindle bearing test platform and testing standards and testing procedures, and ensure that all domestic fans supporting bearing reached the international advanced level. Wafangdian Bearing Group has been successful for Guangdong Mingyang, sealed angular contact ball bearing , VESTAS and other customers at home and abroad to provide 1.5 MW, 2 MW, 2.5 MW and 3.0 MW wind turbine supporting spindle bearings.

Part of the high-precision bearings need to rely on imports secret

Although in recent years, international competitiveness of products has improved, but are mostly concentrated in the middle and low areas, such as low-value-added products, Rolling mill bearing ,some high-precision bearings need confidential dependence on imports, especially high-end precision bearings still need to import. Case in precision machine tool spindle bearings, spindle bearings as the basis for machine tool accessories bearing, its performance directly affects the speed of the machine, rotary precision,super-precision bearing ,rigidity, anti-chatter vibration cutting, noise, temperature and thermal deformation, thereby affecting accuracy, surface quality machined parts.

For CNC machine tools, machining centers and other high-speed, high-precision machine tool spindle bearing, you need to choose P4 and above grade ultra precision bearings. With the rapid development of numerical control technology, complex, high-speed, intelligent, sophisticated,sealed angular contact ball bearing ,environmental protection has become a major trend in today's machine tool industry technology development.

ZYS high speed precision bearing

High-speed precision bearings as Luoyang Bearing Science Technology Co., Ltd., one of the pillars of products,Rolling mill bearing has been formed to precision machine tool spindle bearings, rolling screw bearings, turntable bearings, high-speed spindle bearings, high-speed woodworking machinery bearings, bearing the printed circuit board dedicated high-speed drilling and milling machine and marine turbocharger bearings as the leading products bearing production system.

Structure type ZYS production of high precision bearings angular contact ball bearings, including ceramic ball bearings; single, double row cylindrical roller bearings; deep groove ball bearing; three, four-point contact ball bearings; angular contact thrust ball bearing; rolling screw special ball bearings, tapered roller bearings, thrust / radial bearings and other types of bearings.

Shielded deep groove ball vibration measurement with rubber ring

Shielded deep groove ball vibration measurement with rubber ring of deep groove ball bearings with snap groove deep groove ball bearings, have installed ball gap large load capacity of deep groove ball bearings, double row deep groove ball bearings.
Deep groove ball bearing structure is simple, easy to achieve compared with other types of manufacturing high precision, so easily into a series of mass production, lower manufacturing costs, the use of extremely common. In addition to the basic type of deep groove ball bearings,using thermal heating bearing installation method, you can avoid with the surface by abrasion. When the tank is heated by the bearings, should be at a certain distance from the bottom grid network, or hung with a hook bearing, the super-precision bearing can not be put on the bottom to prevent the heavy impurities into the bearing, or uneven heating, the tank must have a thermometer, strictly control the oil temperature must not exceed 100 ℃, in order to prevent tempering effect, reducing the hardness of the ferrule.

Crossed roller bearings internal structure was 90 ° roller arranged perpendicular cross

Crossed roller bearings internal structure was 90 ° roller arranged perpendicular cross,
Spacing between rollers fitted retainer or isolation block to prevent roll-tilt roller mill mutual observation between child, effectively preventing the increase in rotational torque. Further, one of the rollers does not occur or the latch-up phenomenon of the contact; same time as the inner and outer ring is a split structure, the gap can be adjusted even if the preload is applied, can be obtained with high accuracy rotation.
2, the operation simplifies installation
Divided into two parts of the outer or inner ring, and after loading the roller holder is fixed together, so when you install operation is very simple.
3, bear large axial and radial loads
Because the rollers are arranged vertically spaced retainer by 90 ° to each other in a V-shaped groove raceway, this design makes cross roller High speed Spindle can withstand higher radial load, axial load and moment load and all load direction.
4, substantial savings in installation space
Small, thin structure of particular cross-roller lubricating oil inner and outer rings is a minimum size is close to the limit of small size, and has high rigidity, so the most suitable for the joints of an industrial robot or a rotary portion of the rotary machining center versatile table, robot rotating part, precision rotary tables, medical equipment, measuring instruments, IC manufacturing devices.
High 5 speed capability
Reducing the length of the shaft 6 and the processing cost, result in a limited thermal expansion changes the geometry

Cross roller bearings

Cross roller bearings, because the inner or outer ring is split, and the interval after loading the roller cage, and Cross-Roller Ring secured together to prevent separation from each other, so when you install the Cross-Roller Ring Operation simple. Since the roller is staggered, so only one set of Cross-Roller Ring can withstand the loads in all directions, compared with the traditional model, rigidity increased by 3 to 4 times. Meanwhile, due to cross roller bearing inner or outer ring is constructed of two split, adjustable automotive bearing clearance, even if they are applied preload can be obtained with high precision rotary motion.

Crossed roller bearings are roller between the inner and outer wheel intervals

Crossed roller bearings are roller between the inner and outer wheel intervals intersecting at right angles to each other arranged. They can withstand the load from all directions (such as an axial thrust or momentum load, etc.). Due to the roller surface into line contact with the rail, therefore, the possibility of bearing a load and elastic deformation is small. This type of super-precision bearing are widely used in industrial automation, such as robots, machine tools and medical facilities, etc., need high rigidity, compact and high-speed still ensuring accurate of occasions.
In cross roller bearings, cylindrical roller in was due to a 90 ° V-shaped groove raceway is vertically aligned with each other through a spacer retainer, so a cross roller Wind turbine bearing can bear radial load, axial load and load torque loads in all directions and so on. Minimum size of the inner and outer rings are miniaturized, in particular close to the limit of a very thin type of compact size, and has high rigidity, it is most suitable for the joint portion or a rotating portion of the industrial robot, the rotary table of the machining center, use the rotating portion of the manipulator, precision rotary tables, medical equipment, meters, IC manufacturing equipment, etc..

Support base has eight models of standard ball screw shaft

Support base has eight models of standard ball screw shaft end bars inventory of finished products, prepared a standardized support base EK, EF, FK, FF type, the general preparation of standard ball screw bar support base AK, AF , BK, BF type.
2 fixed side fitted with preload adjustment angle JIS5 grade level or P0 contact ball insert ball bearing, screw bars to follow the choice to do the most economical grade mix
3 support side using deep trench ball bearings.
4 supporting base EK, BK, FK and AK-type internal bearings contain the right amount of lithium soap grease, with a special seal. Therefore, long-term use of these models.

take into account the best use of bearings and ball

take into account the best use of turbocharger bearings and ball screw bars on rigid balancing, high rigidity and low torque of angular contact ball bearings (contact angle of 30 °, free combination). Meanwhile, the ultra-compact support unit EK6,8 equipped with ultra-small ball screw bars for the development of the ultra-compact angular contact ball bearings. This bearing contact angle is 45 °, ball diameter is small, the number of balls and more, with a high rigidity, high-precision ultra-compact angular contact ball bearings, slewing can get a stable performance.
(2) the shape of the support unit and support unit has angle-round series, can be selected according to the application.
(3) small in size and easy installation of the support unit is considered around the mounting space, the design of a small volume. Meanwhile, adjusted pre-loaded pressure Dental bearing assembly can be directly after delivery, not only reduces the assembly work, but also improve the accuracy of the assembly

Ball screw support base is connected to the screw and motor bearings

Ball screw support base is connected to the screw and motor bearing manufacturers, construction and specialty bars for standard ball screw shaft end finished goods inventory, prepare a standardized support unit EK, EF type, the general preparation of the ball screw bars standard support unit BK, BF type. The fixed side support unit fitted with JIS5 level preload adjusting the angular contact ball bearings. Especially in EK6,8 ultra-compact formula, equipped with ultra-small angle bars for ultra-small ball screw developed by the contact angle of 45 ° contact ball bearings, to achieve high rigidity, high precision and stable rotation performance. Support side support unit using deep groove ball taper roller bearing. Support unit EK, BK type of internal load bearing right amount of lithium soap grease, sealed with a special gasket, can directly install, long-term use.

Materials used pure steel, extended service life.

More closely integrated into the pre-load tolerance for chatter-free cutting; tighter width tolerances, without grinding the cover can be easily assembled again.
Innovative cage designed to accommodate more spheres, with a higher load capacity.
Has ABEC 9 / ISO P2 axial running tolerances, able to duplicate the Ceramic Ball to achieve the most precise positioning accuracy.
Double row bearings with integral low torque contact seals prevent contaminants to ensure reliable operation of the bearing, extending bearing life.
Supply flange (MMF) and illegal orchid (MMN) series bearings, simplified standard and rotary nut type of installation.

Also known as surface roughness roughness

Also known as surface roughness roughness, grinding spindle finish instrument, surface roughness tester, roughness tester, roughness tester, roughness tester, and other names, the first overseas R & D and later introduced the country. When the roughness of the surface roughness measurement, the sensor on the measured surface of the workpiece, driven by the drive mechanism inside the instrument sensors do constant glide along the surface to be measured, the sensor through the built-in stylus feel sharp measured surface roughness degrees, then the measured surface roughness of the workpiece caused by a displacement of the stylus, the amount of displacement of the inductance of the sensor coil changes the inductance, the measured surface roughness to generate an analog signal proportional to the output of the phase-sensitive rectifier, after the signal is amplified and level conversion into the data acquisition system.

The use of wind turbines, Four-Row Cylindrical Roller Bearing is an endless stream of electricity into a standard household use us, the extent of their savings is obvious, a cost of household electricity only 20 yuan a year of battery fluid. And now the wind turbines have more than a few years ago greatly improved performance, previously only be used in a few remote areas, wind turbines connected to a 15W bulb direct electricity, out of a dark and often damage the bulbs. And now because of advances in technology, the use of advanced chargers, inverters, wind power has become a certain tech small systems, and can replace the normal electricity under certain conditions. Mountainous can take the system to make a perennial street at no cost; it can be used to make highway signs night lights; mountain children can study up under a fluorescent lamp; high-rise roof wind motor city also available, which will not only save but the real green Power. Domestic wind turbines, not only can prevent blackouts, but also increase interest in life. In tourist areas, border, schools, military and even behind the mountains, wind turbines are becoming the people's purchasing hot spots. Radio enthusiasts use their own technology in wind power generation services for the mountain people, so that people watch television and lighting, electricity and urban synchronization, but also make their own labor to get rich.

Usually people think that wind power is completely determined by the wind generator power

Usually people think that wind power is completely determined by the wind generator power, always wanted to buy a bigger wind turbines, which rotary table bearing is incorrect. The current wind generator just to the battery charge, while the energy stored up by the battery, it is the size of the end-use electrical power have a closer relationship with the battery size. But mainly depends on the magnitude of power of the size of the air volume, not just the size of the power head. In the Mainland, small wind turbines would be more appropriate than big. Because it is more likely to be driven by a small amount of wind power generation, continuous small wind, wind more than momentary supply large amounts of energy. When there is no wind it can also be caused by normal use of wind energy, which means that a 200W wind generator can also be used by a large battery and inverter fit, get 500W or 1000W and even more power out.

Wind turbines due to unstable wind

Wind turbines due to unstable wind, so the output is a change from 13 to 25V AC, subject rectifier charger, and then the storage battery charging, so wind turbines to generate electricity into angular contact thrust ball bearing. Then there is the protection circuit power inverter, the battery chemical energy into AC 220V mains, in order to ensure stable use. 

Mechanical connection and power transmission couplings horizontal axis wind turbine blades are connected by high-speed shaft and the gear box and universal elastic, the torque is transmitted to the drive shaft of the generator, this coupling should have good damping and shock absorption the characteristics, the performance of an appropriate amount of the absorption offset radial, axial, and at an angle, and the coupling mechanism can prevent overload. Another is direct drive turbine blades are not directly connected to the blower motor and the motor through a gearbox type.

Light-cut method is the use of "light cut principle" to measure the surface roughness

Light-cut method is the use of "light cut principle" to measure the surface roughness.
When fatigue testing machine surface roughness, the sensor on the measured surface of the workpiece, driven by the drive mechanism inside the instrument to do constant glide along the measured sensor surface, the sensor measured surface roughness feelings through the built-sharp stylus, this the measured surface roughness of the workpiece caused by the stylus is displaced, the displacement amount sensor inductance coil inductance changes, and the measured surface roughness to generate an analog signal proportional to the output of the phase-sensitive rectifier, which signal through after amplification and level shifting into the data acquisition system, DSP chip data acquisition digital filtering and parameter calculation, measurement results on the LCD readout can also be output on the printer, you can also communicate with the PC.

Applications roughness are

Applications roughness are: one, insert ball bearing, mainly metal manufacturing. The initial roughness generated is to detect the surface roughness of machined parts and raw. Especially in comparison stylus roughness measuring instrument for the detection of relatively hard texture of the metal surface. Such as: automotive spare parts processing and manufacturing, machinery parts processing and manufacturing, and so on. The processing and manufacturing industries as long as it comes to the workpiece surface quality, roughness tester for testing applications is essential. Shanghai full of love Feng Precision Instrument Co., Ltd. is a professional agent in Japan MITUTOYO Mitutoyo gages and measuring instruments and gauges SK Japan and other professional firms. Second, the non-metal processing and manufacturing, with the progress and development of technology, more and more new material applied to the processing technology, such as ceramics, plastics, polyethylene, etc., are some of the bearing is to use a special ceramic materials processing and production , as well as valves and other is the use made ​​of polyethylene material processing. These materials are hard, some applications can replace metal material of the workpiece, in the production process also requires the detection of surface roughness. Three, with the roughness of the technology and features continue to strengthen and improve, as well as in-depth promotion and application, more and more industries were found to be demand for roughness testing, except machinery manufacturing, the electricity, telecommunications, electronics, , such as the production process also need to assess the roughness on the switch coupling, integrated circuits and semiconductors, and even stationery used in people's lives, tableware, tooth surface roughness of the surface to be used in human testing.

Roughness tester called many names surface roughness tester

Roughness tester called many names surface roughness tester, surface finish instrument, surface roughness tester, roughness tester, roughness tester, roughness tester. It has high accuracy, wide measuring range, easy to operate, easy to carry, job stability and other characteristics, can be widely used in a variety of metal detection and processing of non-metallic surface, the instrument is a sensor host integration pocket instruments, with handheld, turbocharger bearings is more suitable for use in the production site. Shape with pull aluminum mold design, durable, anti-electromagnetic interference capability significantly, with the current design of the new trend.