One-off forming device for making gear workpiece with internal and external teeth

Abstract

The invention relates to a one-off forming device for making a gear workpiece with internal and external teeth. The one-off forming device comprises an upper die and a lower die. The upper die comprises an upper die seat and an internal tooth forming upper convex die installed in the upper die seat; and a guide column which is concentric with the internal tooth forming upper convex die is arranged at the lower part of the internal tooth forming upper convex die. The lower die comprises a lower die seat and a lower female die fixed in the lower die seat; a male die guide sleeve which is concentric with the guide column is fixed in the lower female die; a cylindrical hole matching with the guide column is arranged at the upper part of the inner cavity of the male die guide sleeve; an external tooth forming die which is concentric with the male die guide sleeve is fixed at the lower part of the inner cavity of the male die guide sleeve; and an ejector is arranged below the lower female die. Through the guiding between the guide column and the male die guide sleeve, the one-off forming device ensures the coaxiality of the internal teeth and the external teeth of the workpiece, and therefore the machining quality of the workpiece is ensured.

Description

technical field [0001] The invention relates to a cold extrusion forming die, in particular to a one-time forming device for a gear workpiece with internal and external teeth. Background technique [0002] Such as figure 2 , image 3 and Figure 4 The output gear workpiece 9 shown has internal teeth 16 in the cavity at one end and external teeth 15 at the other end. After the gear workpiece 9 is formed by cold extrusion, the inner teeth 16 and the outer teeth 15 are no longer processed, so the relative position requirements must directly meet the drawing requirements, and the coaxiality requirements must be within 0.05. In the cold extrusion process, the center of the inner tooth punch must be coaxial with the center of the outer tooth forming die, but the existing forming dies cannot meet this requirement, resulting in unqualified workpieces. Contents of the invention [0003] In view of the above problems, the present invention provides a one-time forming device for ...

AI Technical Summary

Problems solved by technology

In the cold extrusion process, the center of the inner tooth punch must be coaxial with the center of the outer tooth forming die, but the existing forming dies cannot meet this requirement, resulting in unqualified workpieces

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