JPS6475138A - Manufacture of drill screw and drill part forming die used for said manufacture - Google Patents

Manufacture of drill screw and drill part forming die used for said manufacture

Info

Publication number
JPS6475138A
JPS6475138A JP23054687A JP23054687A JPS6475138A JP S6475138 A JPS6475138 A JP S6475138A JP 23054687 A JP23054687 A JP 23054687A JP 23054687 A JP23054687 A JP 23054687A JP S6475138 A JPS6475138 A JP S6475138A
Authority
JP
Japan
Prior art keywords
burr
drill
protruded
manufacture
dies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP23054687A
Other languages
Japanese (ja)
Other versions
JPH0337811B2 (en
Inventor
Sozo Miyagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MIYAGAWA KINZOKU KOGYO
MIYAGAWA KINZOKU KOGYO KK
Original Assignee
MIYAGAWA KINZOKU KOGYO
MIYAGAWA KINZOKU KOGYO KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MIYAGAWA KINZOKU KOGYO, MIYAGAWA KINZOKU KOGYO KK filed Critical MIYAGAWA KINZOKU KOGYO
Priority to JP23054687A priority Critical patent/JPS6475138A/en
Publication of JPS6475138A publication Critical patent/JPS6475138A/en
Publication of JPH0337811B2 publication Critical patent/JPH0337811B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/027—Rolling of self-tapping screws

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

PURPOSE:To obtain a minute metallic crystal grain of a drill part, to prevent a crack, and to improve the strength and the rigidity of a cutting edge, by suppressing a burr from being protruded by executing a non-slip control so that an excess metallic material is not protruded freely from a forming recessed part. CONSTITUTION:When a stock 1 is supplied between a pair of forming dies 3 of a punching device, the tip part of a shaft part 2 is inserted and held between forming recessed parts 4 of the dies 3 and a drill part 5 is formed, an excess metallic material protruded from the forming recessed parts 4 goes in between opposed tapered surfaces 9, and a burr 6 is formed. In this case, the excess metallic material protruded from the recessed parts 4 is detained to a slender recessed groove 23 being a non-slip means A and its slip is stopped, and it is not forged in a free state, therefore, a tensile distortion is not generated, a metallic crystal particle of the drill part 5 becomes minute, and also, no crack is generated. The stock 1 being in a state that the burr 6 has been formed is fed between a pair of dies, a thread is cut by a thread cutting part, and immediately before the thread cutting is ended, the burr 6 is cut down by the deburring surface.
JP23054687A 1987-09-14 1987-09-14 Manufacture of drill screw and drill part forming die used for said manufacture Granted JPS6475138A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23054687A JPS6475138A (en) 1987-09-14 1987-09-14 Manufacture of drill screw and drill part forming die used for said manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23054687A JPS6475138A (en) 1987-09-14 1987-09-14 Manufacture of drill screw and drill part forming die used for said manufacture

Publications (2)

Publication Number Publication Date
JPS6475138A true JPS6475138A (en) 1989-03-20
JPH0337811B2 JPH0337811B2 (en) 1991-06-06

Family

ID=16909455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23054687A Granted JPS6475138A (en) 1987-09-14 1987-09-14 Manufacture of drill screw and drill part forming die used for said manufacture

Country Status (1)

Country Link
JP (1) JPS6475138A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5980390A (en) * 1997-10-17 1999-11-09 Ferrante; Frank Die for self drilling screws
US6110047A (en) * 1999-08-16 2000-08-29 Lin; Tsang-Yao Mold for forming a screw with an auger tip
CN109773101A (en) * 2018-12-19 2019-05-21 常熟市常力紧固件有限公司 A kind of moulding process of scrapings slot bolt

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS533344A (en) * 1976-06-30 1978-01-13 Ricoh Co Ltd Fixing device of electrophotographic copier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS533344A (en) * 1976-06-30 1978-01-13 Ricoh Co Ltd Fixing device of electrophotographic copier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5980390A (en) * 1997-10-17 1999-11-09 Ferrante; Frank Die for self drilling screws
US6110047A (en) * 1999-08-16 2000-08-29 Lin; Tsang-Yao Mold for forming a screw with an auger tip
CN109773101A (en) * 2018-12-19 2019-05-21 常熟市常力紧固件有限公司 A kind of moulding process of scrapings slot bolt

Also Published As

Publication number Publication date
JPH0337811B2 (en) 1991-06-06

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