Rod end open groove cold heading die

Abstract

The invention discloses a cold heading die for rod end opening grooves. The cold heading die is characterized in that counter bores are formed in the end rods before cold heading of the rod end opening grooves; the cold heading die comprises a die shell, a cushion block, a movable punching sleeve, material pushing punching rods and a cutter; the cushion block is fixed at the lower end of the die shell and is provided with a sleeving cylinder stretching into an inner hole of the die shell; a jacking hole is formed in the middle of the cushion block; a jacking rod is movably arranged in the jacking hole; the movable punching sleeve is movably arranged in the inner hole of the die shell; the upper end face of the movable punching sleeve is always not lower than the upper end face of the die shell; a plurality of small jacking rods are circumferentially arranged between the movable punching sleeve and the sleeving cylinder of the cushion block; springs are connected at the bottoms of the small jacking rods; a punching sleeve hole with the inner diameter being the same as the jacking hole is formed in the movable punching sleeve; the material pushing punching rods are movably arranged in the punching sleeve hole and the jacking hole; a cutter groove is formed in the upper portions of the material pushing punching rods; the cutter is movably arranged in the cutter groove; the side face of the cutter is in an inverted-T shape with the narrow upper portion and the wide lower portion; and the cutter and the movable punching sleeve can relatively move. The cold heading die can be used for cold heading machining of the rod end opening grooves, and the quality of the opening grooves is guaranteed.

Description

technical field [0001] The invention relates to the technical field of cold heading, in particular to a cold heading die used for opening grooves at rod ends of cold heading shaft and rod parts. Background technique [0002] Some shaft parts, such as the central shaft of the seat belt self-locking device, have deep open grooves at the end of the shaft. These open grooves cannot be made by cold heading, even if the patent No. 201510196500.1 and the patent name " The patented technology of the ejection device after cold heading is also not good, so the milling method is currently used for machining, which is inefficient and difficult to guarantee the quality of the open groove. Contents of the invention [0003] In view of the problems existing in the current known technology, the technical problem to be solved by the present invention is to provide a cold heading die for rod end open grooves that can be used for cold heading processing of rod end open grooves and ensure the...

AI Technical Summary

Problems solved by technology

[0002] Some shaft parts, such as the central shaft of the seat belt self-locking device, have deep open grooves at the end of the shaft. These open grooves cannot be made by cold heading, even if the patent No. 201510196500.1 and the patent name " The patented technology of the ejection device after cold heading is also not good, so the milling method is currently used for machining, the efficiency is low, and it is difficult to ensure the quality of the opening groove

Images