JPS56134028A - Punch for pressing - Google Patents

Punch for pressing

Info

Publication number
JPS56134028A
JPS56134028A JP3614680A JP3614680A JPS56134028A JP S56134028 A JPS56134028 A JP S56134028A JP 3614680 A JP3614680 A JP 3614680A JP 3614680 A JP3614680 A JP 3614680A JP S56134028 A JPS56134028 A JP S56134028A
Authority
JP
Japan
Prior art keywords
face
angle
inclination
punch
blade
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.)
Pending
Application number
JP3614680A
Other languages
Japanese (ja)
Inventor
Naonobu Kanamaru
Akira Shoji
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3614680A priority Critical patent/JPS56134028A/en
Publication of JPS56134028A publication Critical patent/JPS56134028A/en
Pending legal-status Critical Current

Links

Landscapes

  • Forging (AREA)
  • Punching Or Piercing (AREA)

Abstract

PURPOSE: A punch for pressing which comprises in providing slopes of different angles of inclination to the end face of a blade part to two stages and which makes possible blanking of particularly a thick sheet material by dispersing the stresses (compressive stresses) in the blade tip part.
CONSTITUTION: A plane part 2 formed to a range of diameter d2 and the 1st slope 3A having arelatively small angle θ1 of inclination formed around this plane part 2 are provided to the end face 1A perpendicular to the axial direction of the punch blade part 1 of a superhard material. Further, the 2nd slope 3B having an angle θ2 of inclination larger than the face 3A is formed around the face 3A. A peak 4 having a maximum diameter d1 in the blade part 1 is formed to the outside circumference of the face 3B and the back surface 5 of this peak part 4 is made gently continuous to the relief part 6 of a relatively large radius. It is preferable to set the angle θ1 of the above-described face 3A at, for example, 5W15°, and the angle θ2 of the face 3B at, for example, 25°W35°, respectively. Also, it is preferable to select the width (h) of the face 3B at, for example, 0.2W0.7mm.
COPYRIGHT: (C)1981,JPO&Japio
JP3614680A 1980-03-24 1980-03-24 Punch for pressing Pending JPS56134028A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3614680A JPS56134028A (en) 1980-03-24 1980-03-24 Punch for pressing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3614680A JPS56134028A (en) 1980-03-24 1980-03-24 Punch for pressing

Publications (1)

Publication Number Publication Date
JPS56134028A true JPS56134028A (en) 1981-10-20

Family

ID=12461644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3614680A Pending JPS56134028A (en) 1980-03-24 1980-03-24 Punch for pressing

Country Status (1)

Country Link
JP (1) JPS56134028A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007098423A (en) * 2005-10-03 2007-04-19 Matsushita Electric Works Ltd Circular punch for piercing
JP2009125802A (en) * 2007-11-28 2009-06-11 Ntn Corp Method and device for calking pinion shaft
JP2011078998A (en) * 2009-10-05 2011-04-21 Nissan Motor Co Ltd Pierce punch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007098423A (en) * 2005-10-03 2007-04-19 Matsushita Electric Works Ltd Circular punch for piercing
JP2009125802A (en) * 2007-11-28 2009-06-11 Ntn Corp Method and device for calking pinion shaft
JP2011078998A (en) * 2009-10-05 2011-04-21 Nissan Motor Co Ltd Pierce punch

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