公开(公告)号：US5378295A

公开(公告)日：1995-01-03

申请号：US028274

申请日：1993-03-09

Applicant: Hiroyuki Yamashita ,  Toshiharu Hoshi ,  Yuma Horio ,  Kazuhiro Tsuchiya ,  Takashi Iijima ,  Kikuo Nishida

Inventor： Hiroyuki Yamashita ,  Toshiharu Hoshi ,  Yuma Horio ,  Kazuhiro Tsuchiya ,  Takashi Iijima ,  Kikuo Nishida

IPC: A63B53/04 ,  C21D1/18 ,  C21D1/32 ,  C21D8/00 ,  C21D9/00

CPC classification number: A63B53/04 ,  A63B53/0466 ,  A63B53/047 ,  C21D8/00 ,  C21D9/0068 ,  A63B2053/0416 ,  A63B2209/00 ,  C21D1/18 ,  C21D1/32

Abstract: In production of a shell-type golf club head made up of several different pieces, an iron-type material of a specified chemical composition and carbon equivalent is subjected to a combination of annealing before shaping with quenching after shaping. Exclusion of the conventional casting process in production much improves mechanical characteristics of the product and increase mechanical strength enables formation of a large size golf club head with an enlarged sweet spot. Limited and locally specified disposition of weld lines assures highly accurate lie and loft angles with reduced welding strain.

Abstract translation: 在制造由几种不同件构成的壳型高尔夫球杆头的情况下，将具有规定化学成分和碳当量的铁型材料在成形后进行退火与成型后的淬火的组合。 在生产中排除传统的铸造工艺大大改善了产品的机械特性并增加了机械强度，使得能够形成具有增大的甜点的大尺寸高尔夫球杆头。 焊缝的局限性和局部指定的布置确保了具有减少的焊接应变的高精度的摆放角和倾角。