Cold extrusion mold for ball stud

Abstract

The invention discloses a cold extrusion mold for a ball stud. The cold extrusion mold comprises an upper mold (1), a lower mold (2), an upper mold sleeve (3), a lower mold sleeve (4) and a product (6), wherein the upper mold (1) is fixed in the upper mold sleeve (3); the lower mold (2) is fixed in the lower mold sleeve (4); a lower mold base plate (5) is arranged in the lower mold sleeve (4); the lower mold base plate (5) is located at the bottom of the lower mold (2); the product (6) comprises a bulb (7), a neck part (8) and a rod part (9); a first bulge (10) and a second bulge (11) are arranged on the rod part (9); the first bulge (10) is located between the neck part (8) and the second bulge (11). The cold extrusion mold for the ball stud, provided by the invention, has the advantages of less machining allowance of the ball stud, higher strength, lower cost and convenience in realization.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a ball pin cold extrusion mold. Background technique [0002] Today, when automobiles are becoming more and more popular, automobile manufacturers pay more and more attention to the product quality and manufacturing cost of automobiles. Therefore, how to improve product quality and reduce the manufacturing cost of automobiles has become an urgent problem for major automobile OEMs and auto parts enterprises. As a connecting part of the automobile suspension, steering system and stability system, the role of the ball joint assembly cannot be ignored. The reason is that each car needs to use a large number of ball joint assemblies to achieve specific functions. A conventional ball joint assembly mainly includes a ball stud and a ball stud seat. Since the ball diameter of the ball stud is larger than the size of the shaft, the general ball stud manufacturing process requires a relativ...

AI Technical Summary

Problems solved by technology

A conventional ball joint assembly mainly includes a ball stud and a ball stud seat. Since the ball diameter of the ball stud is larger than the size of the shaft, the general ball stud manufacturing process requires a relatively large amount of raw materials, so that it can be The manufacturing cost of the ball stud is relatively high; secondly, due to the large amount of cutting, the shear resistance of the neck of the ball stud is also reduced

Generally speaking, a ball stud includes a ball head, a neck and a club. The club is provided with two annular protrusions, and a groove of a certain size is processed between the two annular protrusions. The part between the ball heads is the neck, and the diameter of the neck increases from the end near the ball head to the end of the annular protrusion. Generally, the ball stud pin is cold-extruded to form the ball head and the club, and two pins are formed on the club. Section, the diameter of the section near the ball head is larger than the diameter of the section away from the ball head, and then the section near the ball head of the club is turned by a lathe to form a ball neck. The machining allowance is large and the waste of raw materials is serious. The connection strength is relatively fragile, and the bending strength and shear strength of the ball stud are reduced. The solution to such problems at home and abroad is mainly through triaxial pressure combined extrusion molding, and the neck extrusion molding is realized. This production method The main disadvantages are higher energy consumption and slower efficiency; the second is to process ball studs by selecting materials with higher strength. This method requires greater molding pressure, and the subsequent processing such as turning consumes more resources. many

Although the strength problem can be solved, the cost problem has not been solved, and the manufacturing cost has also been increased. According to the prior art, a ball stud cold extrusion die is disclosed on the website of the State Intellectual Property Office. It is processed from a semi-finished product, which is designed for a ball pin of a specific shape. The neck is a rectangular longitudinal section, which is only used to squeeze the neck of the ball stud. The Huff mold can be demoulded smoothly. The raised ball stud, the neck and the groove between the two annular protrusions all need to be cold extruded. Since there is an annular protrusion between the neck and the groove, it is impossible to use the Huff block to demould, which is not easy to achieve

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