JPS57146428A - Piercing method for plate - Google Patents

Piercing method for plate

Info

Publication number
JPS57146428A
JPS57146428A JP3198081A JP3198081A JPS57146428A JP S57146428 A JPS57146428 A JP S57146428A JP 3198081 A JP3198081 A JP 3198081A JP 3198081 A JP3198081 A JP 3198081A JP S57146428 A JPS57146428 A JP S57146428A
Authority
JP
Japan
Prior art keywords
plate
annular groove
hole
forming
die member
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
JP3198081A
Other languages
Japanese (ja)
Inventor
Satoru Nomichi
Kazuaki Deguchi
Mikito Nakane
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.)
Taiho Kogyo Co Ltd
Original Assignee
Taiho Kogyo 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 Taiho Kogyo Co Ltd filed Critical Taiho Kogyo Co Ltd
Priority to JP3198081A priority Critical patent/JPS57146428A/en
Publication of JPS57146428A publication Critical patent/JPS57146428A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)

Abstract

PURPOSE:To make piercing without forming burrs by forming an annular groove on a plate by a die having an annular projection and piercing inside of the annular groove to forming side of the annular groove. CONSTITUTION:An annular projection having nearly the same diameter as the hole to be pierced on a plate B is formed on the upper face of a lower die member 1. The plate (b) is placed on the lower die member 1 and an upper die member 3 is pressed from above to plastic work an annular groove C on the plate B. Next, the plate is placed on a cylindrical die 4 which is nearly the same in inner diameter as the groove C of the plate B, and blanking is made from above by a punch 5. A step 6 is formed on the punch 5 and a face D is generated by pressing upper periphery of the hole E of the plate B. By this way, the generation of burrs on the periphery of the hole E can be prevented.
JP3198081A 1981-03-06 1981-03-06 Piercing method for plate Pending JPS57146428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3198081A JPS57146428A (en) 1981-03-06 1981-03-06 Piercing method for plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3198081A JPS57146428A (en) 1981-03-06 1981-03-06 Piercing method for plate

Publications (1)

Publication Number Publication Date
JPS57146428A true JPS57146428A (en) 1982-09-09

Family

ID=12346082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3198081A Pending JPS57146428A (en) 1981-03-06 1981-03-06 Piercing method for plate

Country Status (1)

Country Link
JP (1) JPS57146428A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6221574U (en) * 1985-07-23 1987-02-09
US5816093A (en) * 1994-09-29 1998-10-06 Nitto Kohki Co., Ltd. Method and tool for forming a tapered hole in a cylindrical work by punching extruding
JP2017001096A (en) * 2015-04-29 2017-01-05 トルンプフ ヴェルクツォイクマシーネン ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフトTrumpf Werkzeugmaschinen GmbH + Co. KG Devices and methods for pressure deforming connecting webs between workpiece parts of plate-like workpiece

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6221574U (en) * 1985-07-23 1987-02-09
US5816093A (en) * 1994-09-29 1998-10-06 Nitto Kohki Co., Ltd. Method and tool for forming a tapered hole in a cylindrical work by punching extruding
JP2017001096A (en) * 2015-04-29 2017-01-05 トルンプフ ヴェルクツォイクマシーネン ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフトTrumpf Werkzeugmaschinen GmbH + Co. KG Devices and methods for pressure deforming connecting webs between workpiece parts of plate-like workpiece

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