JPS5775241A - Press-forming method of parts having blind hole - Google Patents

Press-forming method of parts having blind hole

Info

Publication number
JPS5775241A
JPS5775241A JP15169180A JP15169180A JPS5775241A JP S5775241 A JPS5775241 A JP S5775241A JP 15169180 A JP15169180 A JP 15169180A JP 15169180 A JP15169180 A JP 15169180A JP S5775241 A JPS5775241 A JP S5775241A
Authority
JP
Japan
Prior art keywords
blind hole
punch
formed product
die
hole
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
JP15169180A
Other languages
Japanese (ja)
Other versions
JPS5932227B2 (en
Inventor
Mototsugu Akamatsu
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP15169180A priority Critical patent/JPS5932227B2/en
Publication of JPS5775241A publication Critical patent/JPS5775241A/en
Publication of JPS5932227B2 publication Critical patent/JPS5932227B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Forging (AREA)

Abstract

PURPOSE: To prevent occurrence of flaws on the finished surface and improve commercial value by putting a preliminarily formed product having a blind hole in a die, finish-forming with a punch having larger diameter than the blind hole and retreating the punch and thereby pulling out the formed product as it is attached to the punch.
CONSTITUTION: A preliminarily formed product 9 having a raised part continuously from a straight stem and provided with a blind hole 10 at the center is put in a die 34 that has a narrowed inner part continuously from a straight part 55 and provided with an air escape hole 7 at the bottom. A punch that has slightly larger diameter than that of the blind hole 10 of the preliminarily formed product 9 is driven into the blind hole 10 so that preliminarily formed product 9 is swelled out by the difference of diameter of the punch 44 and blind hole 10 to fit the die hole 54. The air is expelled from the air escape hole 7. When the punch 44 is retreated, the finished product 9 having a blind hole comes out from the die 34 being attached to the tip of the punch 44 and shaked down to a stripper 8 without forming flaws on the finished surface as in the case of a knockout pin.
COPYRIGHT: (C)1982,JPO&Japio
JP15169180A 1980-10-28 1980-10-28 Heading method for parts with blind holes Expired JPS5932227B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15169180A JPS5932227B2 (en) 1980-10-28 1980-10-28 Heading method for parts with blind holes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15169180A JPS5932227B2 (en) 1980-10-28 1980-10-28 Heading method for parts with blind holes

Publications (2)

Publication Number Publication Date
JPS5775241A true JPS5775241A (en) 1982-05-11
JPS5932227B2 JPS5932227B2 (en) 1984-08-07

Family

ID=15524149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15169180A Expired JPS5932227B2 (en) 1980-10-28 1980-10-28 Heading method for parts with blind holes

Country Status (1)

Country Link
JP (1) JPS5932227B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170655A (en) * 1991-09-18 1992-12-15 San Shine Hardware Works Co., Ltd. Method for forming hollow articles
US6397652B1 (en) 2000-03-22 2002-06-04 The Sollami Company Tool body and method of manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170655A (en) * 1991-09-18 1992-12-15 San Shine Hardware Works Co., Ltd. Method for forming hollow articles
US6397652B1 (en) 2000-03-22 2002-06-04 The Sollami Company Tool body and method of manufacture

Also Published As

Publication number Publication date
JPS5932227B2 (en) 1984-08-07

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