Non warping surface grinding method for angular-contact roller bearing ferrule

Abstract

The invention relates to a non-warp plane grinding method used for a thrust roller bearing ferrule. An electromagnetic non-core clamp is used as a work piece clamp on a machine tool. The work piece of the thrust roller bearing ferrule is arranged on the clamp and the work piece turns together with a grid of the electromagnetic non-core clamp. The end face of the bearing ferrule is grinded by the end face of a boring grinding wheel. A low magnetic force of the electromagnetic non-core clamp is adopted to clamp the processing ferrule plane of the thrust roller bearing ferrule so as to reduce the stress to the work piece and to reduce an elastic distortion degree of the work piece in a clamping process. Then a parallel difference and a plane degree of the grinded place can be guaranteed and the parallel difference and the warp are all less than 0.002mm. A warp distortion of the work piece is just the 1 to 2 percent of that caused by the common processing method, almost without any warp.

Description

technical field [0001] The invention belongs to the technical field of bearing processing, and in particular relates to a plane grinding method for a thrust roller bearing ring. Background technique [0002] This kind of problem is often encountered in the machining process of thrust roller bearing rings. Since the ring is a thin-walled part, it is easy to deform during heat treatment and processing. When grinding the plane of the ring, a surface grinder is usually used to grind it. Flat surface, when the workpiece is clamped with an electromagnetic chuck, the strong magnetic force will force the workpiece to be flattened, and the workpiece will be elastically deformed. After the processing is completed, the workpiece will return to the deformed state with the elimination of the magnetic force. The warpage of the workpiece processed by this method is relatively serious, especially for high-precision bearing parts, which cannot meet the use requirements at all. To reduce war...

AI Technical Summary

Problems solved by technology

[0002] This kind of problem is often encountered in the machining process of thrust roller bearing rings. Since the ring is a thin-walled part, it is easy to deform during heat treatment and processing. When grinding the plane of the ring, a surface grinder is usually used to grind it. Flat surface, when the workpiece is clamped with an electromagnetic chuck, the strong magnetic force will force the workpiece to be flattened, and the workpiece will be elastically deformed. After the processing is completed, the workpiece will return to the deformed state with the elimination of the magnetic force. The warpage of the workpiece processed by this method is relatively serious, especially for high-precision bearing parts, which cannot meet the requirements of use at all.

To reduce warping deformation, it is necessary to reduce the magnetic force. However, when the surface grinder processes parts, the cutting force of the grinding wheel is very large. Reducing the magnetic force will cause the workpiece to be clamped unreliably. The workpiece may become loose during processing, and even safety problems may occur. Therefore, it is necessary to find a A warpage-free surface grinding method for thrust roller bearing rings is imperative

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