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