A double tension centering fixture

Abstract

The invention discloses a double tensioning and centering fixture, which comprises: a fixed assembly, a first rubber expansion sleeve driving assembly and a second rubber expansion sleeve driving assembly; the fixing assembly includes: a flange plate and a taper body; the first rubber expansion sleeve The sleeve drive assembly includes: pull shaft body, lower rubber expansion sleeve, coupling ring connecting the two, and the first threaded pull sleeve connected to the lower end of the pull shaft body; the second rubber expansion sleeve drive assembly includes: sleeved on the taper body The upper rubber expansion sleeve at the top, the pull rod clamped with the upper rubber expansion sleeve, and the second threaded pull sleeve connected to the lower end of the pull rod; the second threaded pull sleeve runs through the taper body, the pull shaft body and the first threaded pull sleeve. Under the action of external force, the first threaded pull sleeve drives the lower rubber expansion sleeve to move down and tighten the lower inner diameter surface of the workpiece through the pull shaft body and the coupling ring, and the second thread pull sleeve drives the upper rubber expansion sleeve to move down and tighten through the pull rod The upper inner diameter surface of the workpiece, so as to realize the overall positioning of the workpiece. The fixture can hold the workpiece stably and position accurately.

Description

technical field [0001] The present invention involves the field of processing technology in step -level holes, and especially involves a dual -rising tightly fixed fixed fixture that is used to fix the thin -walled wall workpieces of step -level holes. Background technique [0002] In the mechanical processing industry, in order to achieve the positioning and processing of different types of workpieces, a variety of different types of fixtures appear on the market. However, there are currently fewer fixtures for the design of step -level holes in thin -wall workpieces, and the types are single, which affects the processing accuracy of the step -level wall -class workpiece. [0003] At present, during the round processing of step -level holes thin -wall workpieces, the following two methods are mainly used to locate it: the first method is to use a three -claw card to directly fix the inner hole in one end of the step -level holes. After using a three -claw card to install c...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the existing fixtures are difficult to accurately locate and fix the stepped thin-walled workpieces and easily cause deformation of the workpieces, the present invention specifically provides a double-tensioning centering fixture for the structural characteristics of the stepped thin-walled workpieces , through two sets of drive systems, drive two rubber expansion sleeves to fix the different inner diameter surfaces of the workpiece, realize precise positioning and stable clamping of the workpiece, high installation and positioning efficiency, and help improve the processing zero degree of the workpiece

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