Angular contact ball bearings grinding super process planning

Real craft card shall state each step of the process parameters of the product requirements, such as grinding outer channel step, specify a channel diameter, roundness, ditch location, groove curvature, channel shape, roughness and other requirements, as well as workpiece speed, wheel speed, eccentricity, bearing angle, light grinding time and other parameters.

The process should be based on the processing site and precision requirements, the provisions of a good size, shape and position tolerances, roughness and other requirements. Geometric tolerance tolerance refers to the shape and position tolerances. Form tolerances are: ① face flatness; ② oval and cylindrical inner and outer diameters degree; ③ channel curvature ellipse, roundness error, etc.; raceway oval, angular deviation, straightness and so on. Position tolerances are: ① width variation; ② center of the channel parallel to the base surface; ③ the inner diameter of the inner vertical face of the base, the outer diameter of the base of the vertical plane; ④ channel inside diameter, outside diameter of the beating ;

P4 class bearings:

P4 class bearings generally use high speed, a variety of performance is higher, so the process more than the average product, the process requirements are relatively high.

a. outer grinding process route (one kind):

Coarse grind coarse face → face → OD → coarse coarse coarse outer diameter of the channel → → → coarse slope stability tempering → fine

OD grinding mill channel → → → stable tempered OD grinding lapping end → → → grinding diameter grinding outer diameter grinding channel → →

Ultra-fine grinding slope → → Lapping OD channel

I generally coarse than finely ground margin, margin finely grinding off than a large margin, grinding allowance should be noted that appropriate margin is too large, easy to cause deformation and burn rings, too little margin, unable to produce the next process step on the road to eliminate errors and generate scrap, usually talk about the amount of inner and outer diameters of the left direction. Positioning surface or bearing surface should be higher than under the procedures of various shape and position tolerances higher. End mill grinding amount should be possible to make both ends, as in the vertical shaft surface grinder grinding double face, should be non-base surface grinding, regrinding the base surface, the base surface of the ferrule OD, ID, channel, etc. processing procedures, testing benchmarks, also bearing assembly, installation benchmarks. Vertical Spindle Surface Grinding face grinding, the grinding non-base surface to determine the size. Double face grinding mill double face, generally by adjusting both sides of the wheel speed to reach both ends of the grinding amount equal to the surface than the narrow end ferrule wide wheel speed is high. Mill channel, the coarse and fine grinding, the groove position can be made when the base surface (a ramp) offset a little bit of control (must be strictly controlled, calculated or drawing comparison to determine), due to the relatively small margin may be appropriate to avoid the phenomenon of the channel while there is no wear. As outer bearing surface to improve the accuracy of positioning or support for the removal of the last printing, the need for the grinding margin is generally 1 ~ 2μ. Ultra-fine grinding locking channel generally placed after the ultra-precision relative pair due to difficult to control when they need to try to channel grinding tolerances few more compression to ensure locking height headroom height when grinding locking can stay 6 ~ 10μ (unilateral margin). If the ultra-fine grinding locking on channel after channel side easily in the presence of glitches, seriously affecting product performance (vibration, life, etc.).

P0-bearing:
Outer grinding process route (one kind):
Coarse face → (coarse grind end) → → coarse channel coarse outer slopes → → coarse grinding OD → (grinding diameter) → Channel → grinding ultra-fine grinding trench slope → → fine Grinding Lapping OD OD →

b. inner grinding process route (one kind):

Coarse face → face → coarse coarse grind coarse channel inner and outer → → → coarse inner diameter grinding coarse ramp → → Research
→ OD grinding mill grinding diameter channel → → → ultra-fine grinding trench slope
The upper process is not unique, each enterprise and the device should be based on the situation, the strength of technology and control methods for the preparation, etc., to adjust, particularly when grinding the inner ring, a bearing inner ring channel and the inner or outer bearing grinding channel mill channel.
While some also require grinding outer diameter of the ferrule there are many structures, the need to carefully analyze the product structure and geometric tolerances, roughness and other requirements, the preparation of grinding processes.

angular contact ball bearing assembly process preparation:
Assembly process must ensure that the assembled product assembly diagram products fully comply with the requirements, as well as other requirements of the project, such as residual magnetism, typing, flexibility, and appearance. Yes assembly process technology cards, matching tables and clearance, the contact angle, the channel diameter required list and other components.

 P4 level assembly process craft card:

Inner and outer rings lettering demagnetization Cleaning → Inspection → Accessories → Cleaning → ferrule ferrule surface quality inspection → → sampling channel roughness values ​​reinspection ball rules and sub-rules value → → outer channel size sorting heating, assembly kits → radial clearance sampling precision rotation → cleaning → test → test finished appearance and flexibility, vibration detecting residual magnetism, etc. → → test → test contact angle width of the projection amount → test → cleaning, cleanliness inspection → → Inner packing rust , packing (packing list according to requirements)

The contents of each step should have the instrument used and technical requirements, etc. P5 or general level, just a sampling of some processes or omitted.