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81. 发明专利

JPH08323647A STAMPING DEVICE 失效
公开(公告)号：JPH08323647A
公开(公告)日：1996-12-10
申请号：JP15264295
申请日：1995-05-26
申请人： NIPPON YUSOKI CO LTD
发明人： FUKADA TADAYOSHI
IPC分类号： B25D5/00
摘要： PURPOSE: To limit the movement of a body to be inserted loosely onto a shaft body to a specified range on the shaft body and prevent extraction by forming projected pressing parts on a stamping device main body apart from each other by a distance smaller than the diameter of a stamping shaft body. CONSTITUTION: Projected pressing parts 2 are formed on a stamping device main body 1 apart from each other by a distance smaller than the diameter of a stamping shaft body (a). Also the string device main body 1 is pressed against the shaft body (a) by the pressing part 2. By this, the right and left pressing part 2 can form dwelling parts 4 on the shaft body (a), respectively, by one driving. In addition, the dwelling parts 4 are larger than normal chisels. Thus the movement of a body to be inserted loosely onto the shaft body (a) is limited to a specified range on the shaft body (a), and the loosening-off of the body can be prevented.

82. 发明专利

JPH0780783A TOOL FOR MAKING CENTER HOLE IN POLYGONAL FORM 失效
公开(公告)号：JPH0780783A
公开(公告)日：1995-03-28
申请号：JP25105493
申请日：1993-09-13
申请人： YASUDA GIJUTSU SERVICE KK
发明人： YASUDA TOMOHIKO , TOKUGE SHIGEAKI
IPC分类号： B25D5/00
摘要： PURPOSE:To realize a high accuracy of processing of a workpiece by making the section of a center hole provided at the end face of the workpiece, and to rotationally support a dead center, in a polygonal form in order to support the dead center at three points. CONSTITUTION:An edge 3 provided on the top of a handle 2 is formed in a conical form as a whole, and three fan form planes 7 are formed from the base 4 of the edge 3 toward the tip 5 on the inner side of the side surface 6. The tool 1 is pressed to a center hole, or an impact load is given to the tool 1 by a hammering, so as to generate a creeping deformation to the center hole, and three escape surfaces ane three dead center holding surfaces are created between the tool and the dead center.

90. 实用新型

JPS61122033U 失效
公开(公告)号：JPS61122033U
公开(公告)日：1986-08-01
申请号：JP655985
申请日：1985-01-21
IPC分类号： B21J15/18 , B21J15/00 , B21J15/02 , B21J15/16 , B25D5/00 , B30B1/32 , B30B5/00

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