Reverse back-extrusion process of equilateral three-jaw flange sliding sleeve and reverse back-extrusion die

Abstract

The invention provides an equilateral three-jaw flange sliding sleeve reverse extrusion process, which includes reverse extrusion, and the reverse extrusion is to put the billet-made bar into the mold cavity of the reverse extrusion mold Upsetting and back extrusion are carried out simultaneously in the middle to form a blank with an equilateral three-jaw flange at one end and a cylindrical shape at the other end. The invention utilizes the relative movement of the back-extrusion die and the back-extrusion punch to carry out reverse extrusion, so that the processes of upsetting the flange and the back-extrusion sliding sleeve with equal wall thickness are carried out simultaneously, reducing the process and improving the efficiency. This process solves the problem of The problem of difficult material, there is a thick gap between the back-extrusion punch and the inner wall of the back-extrusion die cavity, the contact area between the back-extrusion punch and the bar is small, the friction force is reduced when the material is returned, and the life of the die is also reduced. Improvement, the process is simple and easy, saves materials, and improves efficiency; and the reverse extrusion die is simple to manufacture, easy to assemble, and has a long service life, saving die cost.

Description

technical field [0001] The invention relates to the field of metal precision forging, in particular to an equilateral three-jaw flange sliding sleeve reverse back-extrusion process and a reverse back-extrusion die. Background technique [0002] The equilateral three-jaw flange sliding sleeve is a kind of universal joint with a three-jaw flange in the constant velocity universal joint. It is a kind of complicated shape among ordinary universal joints. Please refer to Figure 1A and Figure 1B . Figure 1A It is a top view structural diagram of an equilateral three-jaw flange sliding sleeve, Figure 1B for Figure 1A main view. The equilateral three-jaw flange sliding sleeve 100 includes an equilateral three-jaw flange 101 at the upper end and a cylindrical sliding sleeve 102 with equal wall thickness at the lower end. The cylindrical sliding sleeve 102 has a barrel-shaped blind hole 103 . The traditional manufacturing process of the equilateral three-jaw flange sliding slee...

AI Technical Summary

Problems solved by technology

The traditional manufacturing process of the equilateral three-jaw flange sliding sleeve mostly uses sand casting, which has low manufacturing precision, cumbersome process, large follow-up processing allowance and long cycle time.

At present, the conventional forging process is mostly used instead of sand casting, and the process of forging the cylindrical sliding sleeve 102 with equal wall thickness first, and then upsetting the equal-sided three-jaw flange 101 is adopted. Although the efficiency can be improved, the upsetting force is large. , it is easy to make the equal-wall thickness cylindrical sliding sleeve 102 at the lower end wrap on the stripper, the stripping force is large, and the life of the mold is greatly reduced

Images