Liquid-plastic clamps for thin-walled bushings

Abstract

The invention discloses a liquid plastic clamp special for a thin-wall shaft sleeve. The liquid plastic clamp comprises a clamp body, an expanding sleeve used for expanding an inner hole of parts such as the thin-wall shaft sleeve, and a bearing nail used for positioning end faces of parts such as the thin-wall shaft sleeve. The clamp body comprises a connecting portion and an expanding mandrel. A cavity is formed in the clamp body. The expanding mandrel and the expanding sleeve are sealed through a sealing ring. A screw used for sealing the cavity is arranged in the connecting portion. A plunger used for sealing the cavity is arranged in the expanding mandrel, is in sliding fit with the inner wall of the expanding mandrel and is coaxial with the clamp body. The end of the expanding mandrel is provided with a bolt which acts on the plunger when screwed in so as to push liquid plastic in the cavity, and the bolt is coaxial with the clamp body. The plunger is provided with a sealing groove, and a sealing ring is arranged in the sealing groove. The liquid plastic clamp has the beneficial effects that the sealing performance is good, liquid plastic will not be leaked after the clamp is used for a long time, and therefore the stable machining precision and safe and reliable clamping force effect are guaranteed.

Description

technical field [0001] The invention relates to the technical field of mechanical clamping and positioning, in particular to a special liquid-plastic clamp for a thin-walled shaft sleeve. Background technique [0002] Because users have higher and higher requirements for machining accuracy, processing efficiency and processing cost, the fixture technology has been continuously developed. Nowadays, in the processing of precision thin-walled parts, the traditional collet chuck and chuck clamping can no longer meet the user's requirements for parts with high precision, high efficiency and low processing cost. Liquid plastic fixtures are used in precision thin-walled bushings The advantages in parts processing are becoming more and more obvious. The use of liquid plastic fixture processing solves the problems of easy deformation of the workpiece and tool vibration in the traditional processing process, the processing efficiency is more than doubled, and the processing accuracy ...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN201510000743 discloses a hydraulic liquid-plastic expanding mandrel clamp. The pull rod of this technology is slidingly connected to the inner wall of the connecting sleeve without sealing protection. After a period of use, the inner wall of the connecting sleeve is worn and enlarged, resulting in leakage of liquid plastic. It will cause the processing accuracy of parts to decrease and the fixture to lose its clamping effect

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