MANUFACTURE OF PUSH ROD FOR ENGINE

摘要

PURPOSE:To manufacture a push rod simply and inexpensively by drawing a tubular metallic material to form a small diameter part having tapered root end and compressing the small diameter part to form a bulging spherical shape. CONSTITUTION:A tubular metallic material 4 made is carbon steel, etc. cut to predetermined length is drawin in the end part and a small diameter part 6 having tapered stepped part 5 at the root end is formed. The small diameter part 6 is formed by compressing by a press working device and formed to a bulging spherical part having an undercut part 8, and if necessary, a stepped part 7a. Thus, a push rod 1 for an engine is obtained.