A lug fixing pad for hole extrusion process

Abstract

The invention discloses an ear flake fixing cushion block for a hole extrusion process. The fixing cushion block is composed of first cushion block modules and second cushion blocks; the two first cushion blocks and the two second cushion blocks are arranged parallelly, combined and fixed to a test machine. The two first cushion blocks and the two second cushion blocks alternate with one another and are in diagonal positions, a flat groove is formed in the apex angle portion, the depth of the groove is less than the thickness of an ear flake, and the centre groove outline shape of each cushionmodule is the same with that of an out outline of the ear flake, and the size of the groove outline is greater than that of the outer outline of the ear flake. Two through holes with the same diameter are symmetrically formed in the axle wire of the bottom surface of each groove, the center of each through hole coincides with the center of an arc section of the groove, and the semidiameter of each through hole is greater than that of an ear flake hole. The ear flake is placed in the groove of the fixing cushion block, displacement of the ear flake during the hole extrusion process can be effectively limited, and the hole extruding effect is optimized. By adjusting distance among the modules, the cushion block can fix ear flakes with different sizes and improve the adaptability of the cushion block.

Description

technical field [0001] The invention relates to the technical field of metal hole extrusion technology, in particular to a lug fixing pad used in the hole extrusion technology. Background technique [0002] In the hole extrusion process of the lug, the lug must first be placed on the fixture under the press, and then the mandrel is inserted into the hole of the lug. After the pressure head of the press contacts the mandrel, the mandrel is pressed. Pass through the lug holes. During this process, ensure the coaxiality of the mandrel and the lug holes. Since the lugs are not effectively fixed in the prior art, the lugs will deviate greatly during the hole extrusion process, resulting in a change in the verticality of the mandrel, thereby affecting the effect of hole extrusion. [0003] In order to avoid the occurrence of the above situation, it is necessary to design a spacer device that can effectively fix the lugs on the fixture of the press, so as to limit the deviation of...

AI Technical Summary

Problems solved by technology

In the prior art, the lugs are not effectively fixed, so the lugs will deviate greatly during the hole extrusion process, resulting in changes in the verticality of the mandrel, which in turn affects the effect of hole extrusion

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