TW200730271A - Forming method of hollow fastening member - Google Patents

Forming method of hollow fastening member

Info

Publication number
TW200730271A
TW200730271A TW095104323A TW95104323A TW200730271A TW 200730271 A TW200730271 A TW 200730271A TW 095104323 A TW095104323 A TW 095104323A TW 95104323 A TW95104323 A TW 95104323A TW 200730271 A TW200730271 A TW 200730271A
Authority
TW
Taiwan
Prior art keywords
blank
punched
slots
punching device
hollow fastening
Prior art date
Application number
TW095104323A
Other languages
Chinese (zh)
Other versions
TWI275429B (en
Inventor
Tu-Huo Zhang
Original Assignee
Anchor Fasteners Ind Co Ltd
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 Anchor Fasteners Ind Co Ltd filed Critical Anchor Fasteners Ind Co Ltd
Priority to TW95104323A priority Critical patent/TWI275429B/en
Application granted granted Critical
Publication of TWI275429B publication Critical patent/TWI275429B/en
Publication of TW200730271A publication Critical patent/TW200730271A/en

Links

Abstract

The present invention relates to a forming method of hollow fastening member. Firstly a proper length of wire material is tailored and punched to a T-shaped blank and the blank is pushed into a die having four convex points by a punching device so the blank is configured with four slots at the periphery and an inner hole is punched and formed as well. Then the punching device with a diameter bigger than the inner hole is used to punch so that the outer diameter of the blank is enlarged and the slots are split open. Next the blank is pushed into a die having a diameter smaller than the slots of the blank by the punching device so the enlarged slots are contracted and an unloading hole is formed at the bottom end of the blank. The top end of the blank is then punched by the punching device so a flat head section is formed and stepped holes with different diameters are formed in the inner hole. Finally the residual material left on the unloading hole is punched off so a hollow fastening unit is formed.
TW95104323A 2006-02-09 2006-02-09 Forming method of hollow fastening member TWI275429B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW95104323A TWI275429B (en) 2006-02-09 2006-02-09 Forming method of hollow fastening member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW95104323A TWI275429B (en) 2006-02-09 2006-02-09 Forming method of hollow fastening member

Publications (2)

Publication Number Publication Date
TWI275429B TWI275429B (en) 2007-03-11
TW200730271A true TW200730271A (en) 2007-08-16

Family

ID=38645936

Family Applications (1)

Application Number Title Priority Date Filing Date
TW95104323A TWI275429B (en) 2006-02-09 2006-02-09 Forming method of hollow fastening member

Country Status (1)

Country Link
TW (1) TWI275429B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101837426B (en) * 2009-03-18 2013-01-02 雅邦企业股份有限公司 Continuous punching blank forming method for chain roller of chain

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104209444B (en) * 2014-08-15 2017-02-08 宾科汽车紧固件（昆山）有限公司 Oil pipe joint cold heading device and production technology thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101837426B (en) * 2009-03-18 2013-01-02 雅邦企业股份有限公司 Continuous punching blank forming method for chain roller of chain

Also Published As

Publication number Publication date
TWI275429B (en) 2007-03-11

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees