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1. 发明公开

EP3778064A1 FORGING TOOL 有权
公开(公告)号：EP3778064A1
公开(公告)日：2021-02-17
申请号：EP19774396.6
申请日：2019-03-28
申请人： NGK Insulators, Ltd. , Miura, Hiromi
发明人： MURAMATSU, Naokuni , KAWAMOTO, Tadahiro , MIURA, Hiromi
IPC分类号： B21J1/02 , B21J13/02
摘要： A forging tool 10 is to forge a workpiece W in a cuboidal forging space S by using first to sixth wall surfaces 21 to 26. The forging tool 10 includes a first die 30, a second die 40, and a third die 60. The first die 30 forms the first wall surface 21 and the second wall surface 22 adjacent to the first wall surface 21. The second die 40 forms the third wall surface 23 and the fourth wall surface 24 adjacent to the third wall surface 23. The third die 60 forms the sixth wall surface 26 in a region surrounded by a contact surface 61 when bottom surfaces 32, 42 of the first die 30 and the second die 40 are brought into contact with the contact surface 61. The first die 30 forms a triangular region 25a two sides of which are a line of intersection of the fifth wall surface 25 with the first wall surface 21 and a line of intersection of the fifth wall surface 25 with the second wall surface 22, the second die 49 forms a triangular region 25b two sides of which are a line of intersection of the fifth wall surface 25 with the third wall surface 23 and a line of intersection of the fifth wall surface 25 with the fourth wall surface 24, and the workpiece W is pressed between the fifth wall surface 25 and the sixth wall surface 26.

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