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答:轴承套圈在淬一回火过程中会变形,使之变成椭圆的事实早已知道。近年来几何精度要求较高的超精密轴承的生产,使人们又注意到磨削过程中套圈的形状也会显著变化,造成大量的返修和报废.
A: The fact that bearing rings deform during quenching-tempering and make them elliptical has long been known. In recent years, the production of ultra-precision bearings requiring high geometrical accuracy has led people to notice that the shape of the ferrule during the grinding process also changes significantly, resulting in a large amount of rework and scrap.