Super let is to point to in good lubrication condition, workpiece rotate at a certain speed, and a fine grit stone with certain pressure workpiece surface to processing, and in vertical direction of rotation to a work as on a concussion movement a processing method. It has the following features:
1. Can effectively reduce the corrugated degrees. Let the process, when millstone and workpiece circular contact is equal to or greater than the surface of the wavelength of the striation, can ensure millstone always in the role of wave and not and troughs contact, this wave contact pressure is bigger, convex peak was removed, thus reducing the corrugated degrees.
2. Improve ball bearing groove of the groove shape error. Super let can effectively improve the groove groove form errors of the general improvement in 35% or so.
3. Can be super let surface produces stress. Let the main process of produce cold body deformation, this is the surface of workpiece formed after let residual stress.
4. Reduce the surface roughness.
5. Can make the surface contact area collar job increase. After super let, collar work surface contact support by grinding the area can be after 15% ~ 40%, increased to 80% ~ 95%.
6. High production efficiency, low labor strength, easy to realize automation.




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