Ejection header for hobbing die

Abstract

The invention relates to an ejection header for a hobbing die, comprising an ejection header body, wherein the ejection header body comprises a cylinder section matched with a die body, a conical surface section matched with steel beads on the die body, and a thread section matched with a central spindle; inserts are uniformly arranged on the conical surface section along the circumferential direction; the inserts and the steel beads on the die body are in line contact. According to the technical scheme, by arranging the inserts on the ejection header body, the original point contact between the inserts and the steel beads is changed into line contact, so that force transferring is dispersed and the structure of the whole ejection header body is stable, and at the same time, the inserts on the ejection header body are simple in structure, simple and convenient to detach and convenient to replace.

Description

technical field [0001] The invention relates to a gear hobbing die, in particular to a plug used for the gear hobbing die. Background technique [0002] The hobbing die is a tool used to realize the connection between the workpiece and the worktable. The workpiece is placed vertically, the lower end is positioned and fixed by the hobbing die, and the upper end is positioned by the thimble of the tailstock of the machine tool. Processing of splines. The gear hobbing die is mainly composed of a mold base, a mold body, a screw handle, a mandrel, an anti-rotation screw, a plug and a steel ball. When in use, the screw handle is mainly manually rotated through the handle, and the screw handle pulls the mandrel to move downward, and the mandrel drives the plug. Moving downward, the conical surface at the lower end of the plug extrudes the steel ball and moves outward along the upper hole of the mold. The steel ball squeezes the inner wall of the workpiece until the workpiece is lo...

AI Technical Summary

Problems solved by technology

The gear hobbing die is mainly composed of mold base, mold body, screw handle, mandrel, anti-rotation screw, plug and steel ball. When in use, the screw handle is mainly manually rotated by the handle. The screw handle pulls the mandrel to move downward, and the mandrel drives the plug. Moving downward, the conical surface at the lower end of the plug extrudes the steel ball and moves outward along the upper hole of the mold. The steel ball squeezes the inner wall of the workpiece until the workpiece is locked with the hobbing die. Since the steel ball and the conical surface of the plug are in point contact, the force transmission between them is relatively Concentration, the strength of the steel ball material is far greater than that of the plug material. During use, the lower cone of the plug is often worn and damaged, causing the hobbing die to fail to lock the workpiece completely, affecting product quality, and it is also inconvenient to replace.

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