A part ejection device for a cold heading machine and its usage method

By designing an adjustable support point lever assembly and a vibration assembly ejection device in the cold heading machine, the problems of low efficiency and low success rate of existing cold heading machines when processing parts of different specifications are solved, achieving flexible adaptation and efficient ejection.

CN121373290BActive Publication Date: 2026-06-30ZHEJIANG ZHENGRUI HEAVY IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG ZHENGRUI HEAVY IND CO LTD
Filing Date
2025-11-18
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The ejection device of the existing cold heading machine requires disassembly and replacement of the ejector rod assembly when processing cold heading parts of different lengths and thicknesses, resulting in low production efficiency, difficulty in meeting the continuous processing needs of multi-specification parts, low success rate of ejection for parts with tight inner walls or slight deformation, and difficulty in effectively overcoming the adhesion between the mold and the part.

Method used

A part ejection device comprising a crankshaft, a lever assembly, and a vibration assembly was designed. The movement distance of the ejector assembly is adjusted by the lever assembly with adjustable support points, and the ejection effect is enhanced by axial vibration of the ejector during the movement of the ejector.

Benefits of technology

It enables the ejection of parts of different specifications without disassembling the device, improving production efficiency and equipment utilization, effectively breaking the friction constraint between the parts and the inner wall of the mold, and improving the ejection success rate and automation level.

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Abstract

This invention relates to the field of cold heading machine equipment, and in particular to a part ejection device for a cold heading machine and its usage method. Addressing the problems of existing technologies, this invention provides a part ejection device for a cold heading machine and its usage method. A rotatable crankshaft is rotatably connected to one side of the upper end of a base, and multiple evenly arranged and synchronously moving ejector rod assemblies are slidably connected to the other side of the upper end of the base. Lever assemblies capable of adjusting the pushing distance are connected between the crankshaft and the multiple ejector rod assemblies. Each ejector rod assembly includes an ejector cylinder, an ejector rod slidably connected axially to the inner side of the ejector cylinder, and an ejector block fixedly connected to one end of the ejector rod. A vibration assembly is connected to the other end of the ejector rod. When the ejector cylinder, ejector rod, and ejector block move synchronously, the vibration assembly causes the ejector rod to drive the ejector block to vibrate axially, resulting in a double ejection effect by superimposing high-frequency axial vibration on the ejector block while it moves linearly as a whole. This effectively reduces the friction between the part and the inner wall of the mold, preventing material jamming.
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