How to judge the replacement period of rotary table bearing?

Rotary Table Bearing plays an important role in construction machinery. If there is damage to the rotary table bearing, it will affect the normal operation of the machinery. Thus, the rotary table bearing should be replaced after a period of operation. There are two methods to judge the condition of the rotary table bearing: one is use Ferrography; the other is to use SPM/I-ID—1 Bearing working condition monitoring instrument.

When using HD-1 instrument, if the pointer is close to the danger zone from the warning area, we should take the lubrication measures. If the pointer is still not returned after measures, we can identify that the bearing has problem. It is safe and economical to use this kind of instrument to judge the bearing condition and then repair it to avoid the stop of machine.

Secondly, we can use simple monitoring tools to determine the replacement time of rotary table bearing. Operators can hold tools against the nearest machine part of bearing to judge the operation condition of rotary table bearing from the sound from the tools. The normal operation sound should be even, stable.

What are the storage conditions for cross roller bearings?

Cross roller bearing is a kind of precision bearing with special structure. It also requires special care during storage. The accuracy and quality of cross roller bearings can be maximized only in the proper environment. What are the storage conditions for cross roller bearings?

1. Cross roller bearings shall be stored in a clean, dry environment. Temperature and humidity shall be controlled within an acceptable range in handling and storage.

2. Some bearings have a certain shelf life. For example, bearing with dust-proof cover and oil seal, when stored for a period of time, the starting torque of the bearing will be larger than the new bearing. At the same time, the lubricating performance of lubricating grease will be destroyed after long storage, so the  bearing should be checked regularly for maintenance.

3.  To ensure the normal and reliable operation of the bearing, adequate lubrication must be applied to prevent direct metal contact between the rolling body, the raceway and the cage, resulting in wear and corrosion on the bearing surface. Therefore, in a variety of applications, the choice of appropriate lubricants and lubrication mode is extremely important.

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.

Automatic Tapered Roller Production Line

Automatic Tapered Roller Production Line

According to the final rollers and technical requirements customer provide, we provide complete solution of equipment，both to bring convenience to customers。

Main parts

Project	Manufacturer
3MZ6030CNC High precision outer centerless grinding machine	ZYS
3MZ6140CNC Cylindrical roller bearing，Tapered roller bearing convexity superfinishing machine	ZYS
3MT4350 CNC generating method roller basis surface grinding machine	ZYS
FHGLX automatic line	ZYS
FHGLX Shakeouts hoppers	ZYS
FHGLX adjust roller direction load material machine	ZYS
FHZP-11 Automatic Roller into the tooling machine	ZYS
FHBZ-12 automatic online packaging machine	ZYS
FHTC-13 high frequency demagnetization machine	ZYS
FHTS-15 Eedy current testing machine	ZYS
G50 automatic dimension measuring machine	ZYS
RASS roller appearance inspection system	ZYS

Main parts

名称	品牌	产地
PLC	XINJE	China
Variable frequency ac unit	DELTA	China
Gear Motor	SEW	Germany
Chain plate	POM	·         The United States
Low-voltage electrical components	Schneider Electric	France
Aluminium product	anodic oxidation treatment	China
Synchronous belt	OPTI	Germany

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.