Manual self-centering clamp for thin-walled part

Abstract

The invention relates to a manual self-centering clamp for a thin-walled part. The manual self-centering clamp is characterized in that at least two groups of radial through holes are formed in a positioning column of a mandrel in the axial direction; each group of radial through holes comprise three or four radial through holes uniformly distributed in the same cross section of the positioning column; positioning clamping columns are connected into the radial through holes in a clearance fit manner; a multi-stage cone shaft is connected into a step inner hole of the mandrel in a clearance fit manner; a reset spring connected onto the multi-stage cone shaft in a sleeving manner is mounted between a boss at the front end of the multi-stage cone shaft and the front-end step surface of the step inner hole; the rear end of the multi-stage cone shaft is connected with an inner hole of an end cover in a clearance fit manner, and the end cover is fixedly connected onto the rear end of the positioning column; conical columns corresponding to the groups of radial through holes are arranged in the middle of the multi-stage cone shaft; each conical column comprises a front-end circular truncated cone and a rear-end circular truncated cone; the conical column surface of each conical column is contacted and connected with the bottom end of the corresponding positioning clamping column; a connecting base is arranged on the end cover; a manual driving rod is mounted in the connecting base; the driving end of the manual driving rod is contacted and connected with the bottom surface of a groove in the rear end of the multi-stage cone shaft.

Description

technical field [0001] The invention relates to a centering fixture for thin-walled parts, in particular to a self-centering fixture for thin-walled parts. Background technique [0002] In mechanical processing, some workpieces are positioned and clamped through their inner holes, but the existing fixtures either have complex structures, or are troublesome to unload, and most of them cannot achieve self-centering, and often cannot meet the conditions Requirements, resulting in poor machining accuracy. Therefore, the Chinese invention patent application number: 201110286659.4 discloses a self-centering fixture. The end of the blue plate has a section of external thread, and the section of external thread is equipped with an adjusting nut. A slidable retaining ring is sleeved on the outer circumference of the mandrel, and a pair of chutes are arranged on the mandrel. There is a pull rod in the center suspension, one end of the pull rod is fixed with the retaining ring by a p...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problem of clamping deformation of thin-walled long parts, and provides a manual self-centering fixture for thin-walled parts

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