公开(公告)号：JPH0516930B2

公开(公告)日：1993-03-05

申请号：JP15443185

申请日：1985-07-12

Applicant: SHINJO SEISAKUSHO YK

Inventor： KARYA TOSHIHIDE

IPC: B23G9/00 ,  B21H3/10 ,  B21K1/56

公开(公告)号：JPH0438918Y2

公开(公告)日：1992-09-11

申请号：JP4167088

申请日：1988-03-29

IPC: F16B25/04 ,  B21H3/06 ,  B21H3/10

公开(公告)号：JPH0464705A

公开(公告)日：1992-02-28

申请号：JP17816990

申请日：1990-07-04

Applicant: SHINDO SEISAKUSHO KK

Inventor： SHINDO TAKUMI

IPC: F16B25/10 ,  B21H3/10 ,  C21D6/00 ,  C22C38/00 ,  C22C38/40

Abstract: PURPOSE:To improve the rust resistance and cutting property of a drill screw, and aim at the mass production at low cost by performing cold forging to the wire material to form a raw material having a head part, a screw part and a drill part, and performing drill tipping processing and screw cutting processing, and processing the drill part with a punching machine, and performing aging processing or the like, and setting a degree of surface hardness of a blade of the drill part at Hv500 or more than and equal to HRC 49. CONSTITUTION:Austenite group stainless steel wire is forged to form a raw material having a head part, a screw part and a drill part. Drill tipping processing and screw cutting processing are performed, and a tensile strength is set at more than 80Kg f/mm and a degree of hardness is set at more than and equal to Hv270 Processing such as molding is performed to the drill part of this raw material with a punching machine and polishing processing is performed, and aging processing or the like is performed, and a degree of surface hardness of a blade of the drill part is set at Hv500 or more than and equal to HRC49. Consequently, non-magnetic characteristic at a low and a high temperature, acid resistance, heat resistance, corrosion resistance, rust resistance and cutting property are improved, and mass production at low cost is possible.

公开(公告)号：JPH03524B2

公开(公告)日：1991-01-08

申请号：JP3386085

申请日：1985-02-21

Applicant: YAMAHIRO KK

Inventor： YAMAMOTO HISAYOSHI

IPC: F16B25/02 ,  B21H3/10 ,  F16B25/10

公开(公告)号：JPH021614B2

公开(公告)日：1990-01-12

申请号：JP17003983

申请日：1983-09-14

Applicant: OSG MFG

Inventor： GOTO HARUO ,  HAYASHI TSUGIO

IPC: B23G7/02 ,  B21H3/10 ,  B23G1/32 ,  B23G7/00 ,  F16B33/02

公开(公告)号：JPS63170046U

公开(公告)日：1988-11-04

申请号：JP5887187

申请日：1987-04-18

IPC: B21H3/10

公开(公告)号：JPS61144913U

公开(公告)日：1986-09-06

申请号：JP2540285

申请日：1985-02-26

IPC: B23G1/16 ,  B21H3/10

公开(公告)号：JPS61192911A

公开(公告)日：1986-08-27

申请号：JP3386085

申请日：1985-02-21

Applicant: YAMAHIRO KK

Inventor： YAMAMOTO HISAYOSHI

IPC: F16B25/02 ,  B21H3/10 ,  F16B25/10

公开(公告)号：JPS6048648B2

公开(公告)日：1985-10-29

申请号：JP9752677

申请日：1977-08-16

Applicant: TOPURA KK

Inventor： KIKUI YUKIO ,  OOSHIMA SHIGEJI

IPC: F16B25/06 ,  B21H3/06 ,  B21H3/10 ,  B21K1/46 ,  F16B25/00

公开(公告)号：JPS6041243B2

公开(公告)日：1985-09-14

申请号：JP6166280

申请日：1980-05-12

Applicant: TOPURA KK

Inventor： YAMAZAKI KATSUHISA

IPC: B21H3/10 ,  B21H3/02 ,  F16B25/00 ,  F16B25/04