Cold heading and processing of threaded fasteners

In addition to the quality of threaded fasteners, forming equipment, thread processing equipment and molds (production technology and equipment) are the key factors to ensure their quality. Especially in the supply of large quantities of multiple varieties, how to ensure the consistency of the product and the prevention of defects for automotive fasteners that require high processing accuracy is one of the problems faced by the fastener production.

　　 At present, domestic fastener factories are limited by funds or other reasons, and mostly use domestic and Taiwan equipment to produce automotive fasteners. To ensure the dimensional tolerance and geometric tolerance of large-scale production of high-end fastener products, Should increase the online monitoring means and mold production level. Eliminate unqualified products in production, thereby ensuring the assembly quality of OEMs and automakers. (Guide: Failure Analysis and Prevention of Pipe Thread)

For cold heading equipment and thread processing equipment, domestic equipment accounted for about 40%, Taiwan equipment accounted for 50%, and imported (Europe, America, Japan) equipment accounted for about 10%; common defects include size and shape tolerance out of tolerance, head Folding, thread streamline upsetting, tooth wrinkles and cracks, etc.

　　 Domestic companies are also investigating and exploring the introduction of high-efficiency and high-precision special machine tools.