A finishing fixture for machining high-precision thin-walled parts

Abstract

The invention provides a finish turning clamp for machining a high-precision thin-wall part. The finish turning clamp comprises a body, a pull rod and an extension rod, wherein a circular through hole is formed in the center of the body; the pull rod is arranged in the circular through hole of the body, and also capable of stretching and retracting freely in the circular through hole; one end of the body is connected to a machine tool transition disc, while the other end of the body is provided with an end face and an outer conical surface; a quick-change flat washer sleeves the body, and the end face of the body is used for supporting the quick-change flat washer, and a sticking power lock sleeves the outer conical surface of the body; one end of the pull rod is connected to a machine tool hydraulic cylinder, while the other end of the pull rod is connected with one end of the extension rod; a gland is arranged on the other end of the extension rod; a washer and a slotted washer orderly sleeve the pull rod from one end to the other end, and the slotted washer is fitted with the gland; further, a compression spring sleeves the extension rod, and is located between the washer and the gland; during working, a workpiece sleeves the sticking power lock between the quick-change flat washer and the slotted washer. The finish turning clamp for machining the high-precision thin-wall part structurally reduces and eliminates elastic deformation resulting from clamping.

Description

Technical field: [0001] The invention relates to a jig, in particular to a finishing jig for processing high-precision thin-walled parts. Background technique: [0002] At present, the AT gearbox is still blank in the field of heavy trucks in China. The important part of the AT gearbox independently produced by our factory - the one-way lock-up clutch is a thin-walled part that requires high precision on the outer circle. The fixture will produce large elastic deformation when processing this thin-walled part. After the part is disassembled, the deformed part will recover, resulting in the part's size and shape accuracy being out of tolerance. [0003] When the traditional expansion-sleeve pull-rod clamp is processing thin-walled parts with high-precision outer circle requirements, the support force of the expansion sleeve will cause elastic deformation of the workpiece, and the elastic deformation will partially recover after the workpiece is disassembled, resulting in the ...

AI Technical Summary

Problems solved by technology

[0002] At present, the AT gearbox is still blank in the field of heavy trucks in China. The important part of the AT gearbox independently produced by our factory - the one-way lock-up clutch is a thin-walled part that requires high precision on the outer circle. The fixture will produce large elastic deformation when processing this thin-walled part. After the part is disassembled, the deformed part will recover, resulting in excessive precision of the part size and shape.

[0003] When the traditional expansion-sleeve pull-rod clamp is processing thin-walled parts with high-precision outer circle requirements, the support force of the expansion sleeve will cause elastic deformation of the workpiece, and the elastic deformation will partially recover after the workpiece is disassembled, resulting in the size and shape of the part. Accuracy is out of tolerance

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