china bearing factory
We are china bearing factory, our main products including Slim Bearing, Cross Roller Bearing, High Speed Precision Angular Contact Ball Bearing, Harmonic Driver Bearing, Special Bearing. Our company can produce all kinds of slim bearing with inner diameter 20mm to external diameter 660mm,light cross roller bearing with accuracy grade from P0 to P4 grade, annual output of thirty thousands.
If you need our product,please email us.
If you need our product,please email us.
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"China Bearing Factory"
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As a China bearing factory, all the worker in our factory is well trained before on duty.
The high speed bearing produced by China bearing factory(Luoyang VSG Bearing Co., Ltd) mainly used in lathe spindles, robot arm, measuring instrument etc. This kind high speed bearing should be mounted in clean & dustless fitting room.
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"China Bearing Factory"
BlogWheeled crane repairs |
10-10 |
This article explains wheeled crane repair work , from understanding the phenomenon , determine the cause talk , to determine a repair solution has been ( A ) failure to understand the phenomenonCrane parts during operation partner suddenly suddenly invaded or mountain now crawling , vibration, abnormal temperature rise and smoke , smell, sound, meter pointer jump swing , oil spills, leaks , leaking , leakage , control failure , etc., called Zhao fan malfunction. When the crane when a fault occurs , some phenomena can clearly be observed , and some hidden imperceptible . Maintenance and inspection must be carefully observed in order to find the real source of it down .( Two ) analyze the causeYi Gu array of phenomena as the basis, in accordance with the rules and guns ball bearing screw failure by practical experience, control apricot find relevant information , list of similar phenomena whose failure may occur for various reasons , sub- Xin structure and [ : operating principles , discussed to determine the real cause of the malfunction . ( Three ) to bearing roller bearings demolition site Failure Analysis is based to determine what caused the failure of the parts, and the parts of the system to determine the demolition inspection of the site. ( Four ) demolition inspection For determining the dismantling of the site, shall give rise to the possibility of failure , to determine the sequence of disassembly
Grinding the bearing surface causes defects |
06-18 |
Bearings in the grinding process, the work surface is achieved by high-speed rotation of the grinding wheel, grinding so if you do not follow the operating instructions for operation and adjust the device, it will work in the bearing surface of various defects, which affects The overall quality of the bearing. bearing manufacturers in precision grinding, due to the rough demanding work surface grinding marks often appear to the naked eye can trace its surface grinding are the following. Performance of cross spiral traces This occurs mainly due to traces wheel bus straight poor, there is uneven phenomenon, in the grinding, the grinding wheel is only partial contact with the workpiece when the workpiece or the wheel back and forth several times after exercise, the performance will be reproduced in the workpiece cross helix, and can be observed visually. these helix pitch and the workpiece table speed, the size of workpiece speed, but also with the wheel axis is not parallel to rail lines and the table. (A) The main reason for the formation of helix 1 Dresser bad, not chamfered corners, unused coolant to be trimmed; 2 table guide rail lubricant too much, resulting workbench floating; 3 machine precision is not good; 4 grinding pressure is too big. (B) the formation of a helix causes 1.V shaped rail rigidity bad, when an offset grinding wheel, but wheel edge in contact with the work surface; 2 noisy wheel dressing table commutation speed is unstable, accuracy is not high, so that the edge of a grinding wheel dressing slightly less; 3. Workpiece itself rigidity; 4 wheel has broken too flaking grit and the workpiece grinding wheel under the iron plot attached to the surface, this should be a good dressing wheel with cooling water wash or scrub clean; 5 wheel dressing well, there are local projections and so on. Surface appears scaly Scaly surface reproduces the main reason is due to traces of grinding wheel cutting edge is not sharp enough, in the grinding occurs when "eating to live" phenomenon, when large vibration. Resulting in surface appears scaly traces of the specific reasons are: A grinding wheel surface litter and oil thing; 2 Wheel untrimmed round; 3 wheel blunt. Dressing sharp enough; 4 fastening frame is not solid diamond, diamond or diamond quality is bad not shake sharp; 5 Wheel hardness uneven. Face nap Surface scuffing marks reproduced mainly due to coarse grain shed, grain sandwiched between the workpiece and the grinding wheel and cause. Workpiece surface grinding was napping in the specific reasons are: 1 coarse grinding traces left behind, grinding when not worn; 2 coolant coarse grains and tiny grains filter is not clean; 3 coarse abrasive wheel just trimmed off easily when; 4 toughness validity or grinding wheel is too soft; 5 abrasive workpiece material toughness with toughness and improper. Workpiece surface has a direct waveform traces We will milled workpiece cut a cross-section perpendicular axis line and zoom, you can see the surrounding approximately sinusoidal. Along its center axis line without turning pan around the track is the sine waveform cylinders, also call this a polygon. The reason is that the waveform generated straight grinding wheel moves relative to the workpiece or the workpiece grinding wheel cyclically changing pressure caused by vibration exigencies. Such vibrations may be forced vibration, it may be self-excited vibration, so straight on the workpiece often more than one wave frequency. Direct waveform traces generated specific reasons are: A grinding wheel spindle gap is too large; 2 Wheel hardness is too high; 3 wheel static balance wheel well or dull; 4. Workpiece speed is too high; 5 large infeed 6 wheel spindle bearing wear, the gap is too large, resulting runout; 7 wheel or bench pressing means "crawl" and so on. Workpiece surface reproduction burns Surface of the workpiece during the grinding process tends to burn, there are several types of burns, one burns machining direction along the wheel, dark black patches; Second, was the line or intermittent line shape. Workpiece surface grinding process of being burned, summed up in the following reasons: 1 wheel too hard or too fine granularity tissue too dense; (2) Feed excessive cutting fluid supply, cooling conditions are poor; 3. Workpiece speed is too low, wheel speed too fast; 4 wheel runout is too large, constantly changing due to grinding depth and burn; 5 dresser dressing is not timely or bad; 6 diamond sharp dresser bad; 7. Workpiece coarse grinding burns too deep, grinding allowance is too small, no worn; 8 Workpiece clamping force or suction deficiencies in the grinding force, the workpiece stops phenomenon exists. Then the workpiece surface in the grinding process of how to know if it works burned? This is accomplished by periodic acid to check it out. Workpiece after pickling, the surface is wet, should immediately astigmatism lamp visual inspection, the normal surface was uniformly dark gray, and if so the software point, showing dark clouds like black spots, and the entire perimeter uncertain; if decarbonization, is rendered dark gray or black piebald; if grinding cracks, the crack was cracked like, yes burns, one wheel machining direction along the surface showing dark black plaques, two lines are present or intermittent lines like. If the grinding process in the burn-in phenomenon, must promptly analyze the causes and take effective measures to solve them, to eliminate bulk burns. Mainly the surface roughness Bearing parts of the surface roughness of both standards and technical requirements, but in the processing and ultra-fine grinding process, for various reasons, often less than the specified requirements. Caused by surface roughness mainly the main reasons are: 1 grinding speed is too low, too fast feed rate, feed excessive, no feed grinding time is too short; 2. Workpiece speed is too high or the workpiece axis and the wheel axis vibration is too large; 3 wheel size is too coarse or too soft; 4 wheel dresser too fast or trimming mechanism gap is too large; 5 diamond wheel dressing is not sharp or of poor quality; 6 ultra-fine oil stone quality is not good, the installation location is not correct; 7 ultra-precision quality is mainly kerosene; 8 ultra-precise time is too short; As long as we strictly follow the operating instructions carefully and checking operations, analyze the reasons for problems in a timely manner and resolve, these defects can be avoided, thus ensuring the overall product quality.
Deep groove ball bearings and plain bearings, compared the advantages and disadvantages |
06-18 |
Deep groove ball bearings are used in the most common bearing type, and its easy to use, simple structure, easy production, mainly used in transmission, instrumentation, motors, appliances, internal combustion engines, transport vehicles, agricultural machinery, construction machinery, engineering machinery and so on.Deep groove ball bearings and sliding bearings, its advantages1, under normal conditions, and its efficiency and hydrodynamic lubricating bearings pretty, but more mixed lubricated bearings should be higher;2, the radial clearance is relatively small, can preload to eliminate backlash, high running accuracy;3, for the same size of the shaft, deep groove ball bearings smaller than the width of the sliding bearings, allows the machine to the axial compact;4, deep grove ball bearing can simultaneously by radial and axial load bearing composite structure so simple;5, less lubricant consumption, easy to seal, easy to maintain;6, no useful for non-ferrous metals;7, the high degree of standardization, mass production, low cost;Compared with plain bearings, deep groove ball bearings disadvantages are:1, less able to withstand impact loads;2, high-speed heavy load bearing lower life;3, vibration and noisy;4, the radial dimension than the sliding bearing large;Select hesitate products are deep groove ball bearings or sliding bearings, when, according to the actual situation of the product, compared to the above advantages and disadvantages, and make the appropriate choice.
roller bearing noise and maintenance and overhaul |
06-17 |
One-way roller bearing materials metallurgical quality early failure affecting one-way roller bearing of the main factors. Followed by metallurgy technology (such as one-way roller bearing steel vacuum degassing, etc.) to improve the quality of raw materials is improved. Raw material quality factors in the one-way roller bearing failure analysis in the proportion has decreased significantly, but it is still a one-way roller bearing failure is one of the main factors. Appropriateness of the selection is still a one-way roller bearing failure analysis of the factors that must be considered. One-way roller bearing failure analysis of the main task is based on a lot of background material, analysis of data and failure modes, find the cause of one-way roller bearing failure of the main factors for targeted improvement measures are proposed to extend the self-aligning roller Sub-way roller bearing service period, to avoid the occurrence of sudden one-way needle bearing early failure. One-way roller bearing vibration on one-way roller bearing failure impact is significant. Example: peeling, dents, rust, cracks, wear, etc. will be in the ball roller bearing vibration detecting reflected so through the use of special single- the needle bearing vibration measuring means (frequency analyzer and vibration meter, etc.) to measure the size of the vibration frequency distribution can be inferred by the abnormal vibration details of the measured values due to the use of one-way roller bearing premise or sensor mounting position etc. and different so each machine needs prior to analysis and comparison of measured values determined after judgment scales. Currently, the use of fine needle bearing unidirectional devices become increasingly sophisticated, prompting one-way roller bearing grease must be used with the following functions without: (A) without and with the same one-way needle bearing operating life, try to delay the maintenance cycle, reduce downtime, labor productivity advances. (2) is dn> 5 × 105 to guarantee a high-speed motor under low temperature, not dump oil, thereby reducing power consumption, shelter motors. (3) the content of their scalar control standards are inevitable under the biggest cuts in equipment noise pollution of the situation. (4) are ultra-low temperature work done under the premise of one-way needle roller bearings guarantee starting and running of spirituality, one-way needle bearing FAQs. Guarantee minimum output power. Removed one-way needle bearing deep groove ball cleaning, cleaning of coarse and fine cleaning, were placed in a container, first put the metal mesh bottom, the one-way roller bearing no direct contact with the dirt container. Coarse cleaning, if the one-way roller bearing with dirt rotation will damage one-way needle bearing deep groove ball rolling surface, should pay attention to. In the crude oil washing, use a brush to smooth and eliminate grease, adhesive material, generally clean, transferred sperm washing.