EP1710027A3 - A process for producing a metal base plate having a projected portion formed with a slit, a die and a mold structure used in the same - Google Patents

A process for producing a metal base plate having a projected portion formed with a slit, a die and a mold structure used in the same Download PDF

Info

Publication number
EP1710027A3
EP1710027A3 EP06251920A EP06251920A EP1710027A3 EP 1710027 A3 EP1710027 A3 EP 1710027A3 EP 06251920 A EP06251920 A EP 06251920A EP 06251920 A EP06251920 A EP 06251920A EP 1710027 A3 EP1710027 A3 EP 1710027A3
Authority
EP
European Patent Office
Prior art keywords
die
projected portion
base plate
metal base
punch
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
EP06251920A
Other languages
German (de)
French (fr)
Other versions
EP1710027B1 (en
EP1710027A2 (en
Inventor
Takafunmi c/o Ricoh Company Ltd Kondo
Hideto c/o Hasama Ricoh Inc Ito
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of EP1710027A2 publication Critical patent/EP1710027A2/en
Publication of EP1710027A3 publication Critical patent/EP1710027A3/en
Application granted granted Critical
Publication of EP1710027B1 publication Critical patent/EP1710027B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • 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
    • B21D28/24—Perforating, i.e. punching holes
    • 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
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • 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
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/02—Stabbing or piercing, e.g. for making sieves

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Punching Or Piercing (AREA)

Abstract

The invention provides a process, a die (1) and a mold structure for producing a metal base plate (5) having a cylindrical projected portion (11) formed with at least one slit (10) which extends from a leading end toward a base end of the cylindrical projected portion (11) by inserting a punch (3) into a die (1) through a metal base plate (5). In the producing process, the metal base plate (5) is interposed between the punch (3) and the die (1), while a hole of the die (1) having at least one projected portion (2) and the punch are aligned with a location of the cylindrical projected portion (11) to be formed and at least one ridge line (4) of a leading end portion of the punch (3) and an apex portion of the corresponding at least one projected portion (2) of the die are aligned with each other, and the punch (3) is inserted into the hole of the die through the metal base plate (5) in such a manner that the at least one slit (10) of the cylindrical projected portion (10) is formed by an edge portion of a peripheral surface of the punch (3) and the corresponding at least one projected portion (2) of the die (1) by the insertion of the punch (3) into the hole of the die (1)
Figure imgaf001
EP20060251920 2005-04-07 2006-04-05 A process for producing a metal base plate having a projected portion formed with a slit, a die and a mold structure used in the same Expired - Fee Related EP1710027B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005111094A JP4746904B2 (en) 2005-04-07 2005-04-07 Processing method, die and mold structure

Publications (3)

Publication Number Publication Date
EP1710027A2 EP1710027A2 (en) 2006-10-11
EP1710027A3 true EP1710027A3 (en) 2008-05-07
EP1710027B1 EP1710027B1 (en) 2009-12-23

Family

ID=36648700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060251920 Expired - Fee Related EP1710027B1 (en) 2005-04-07 2006-04-05 A process for producing a metal base plate having a projected portion formed with a slit, a die and a mold structure used in the same

Country Status (2)

Country Link
EP (1) EP1710027B1 (en)
JP (1) JP4746904B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5176508B2 (en) 2007-12-04 2013-04-03 株式会社リコー Fastening structure, blade structure, developing device, and image forming apparatus
JP5465038B2 (en) 2010-02-22 2014-04-09 日本リークレス工業株式会社 Manufacturing method of metal gasket for cylinder head and metal gasket for cylinder head
CN103506466B (en) * 2012-06-25 2016-01-20 上海贤华内燃机配件有限公司 A kind of processing method of diesel engine gear chamber cover cap main shaft skeleton oil sealing hole
JP5683640B2 (en) * 2013-05-20 2015-03-11 日本航空電子工業株式会社 Cutlery tool

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1044283A (en) * 1912-03-14 1912-11-12 William D Stanger Die for forming metal staying-strips.
US3925875A (en) * 1973-05-29 1975-12-16 Angeles Metal Trim Co Method of constructing a prefabricated wall module
GB1462482A (en) * 1973-01-10 1977-01-26 Nefab Plywoodemballage Ab Production of sheet metal securing plates
JPH09201627A (en) * 1996-01-23 1997-08-05 Ricoh Co Ltd Burring punch and burring
JPH09267140A (en) * 1996-04-01 1997-10-14 Nissan Motor Co Ltd Method for joining metal plate and punch to be used thereof
JP2002321023A (en) * 2001-04-26 2002-11-05 Amada Co Ltd Metal mold for punching

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0644489Y2 (en) * 1988-06-01 1994-11-16 トヨタ自動車株式会社 Burring mold
JPH0810871A (en) * 1994-06-24 1996-01-16 Toyota Auto Body Co Ltd Die for forming burring caulking part and method therefor
JPH11724A (en) * 1997-06-11 1999-01-06 Fuji Heavy Ind Ltd Burring punch
JPH11179452A (en) * 1997-12-19 1999-07-06 Ricoh Co Ltd Method for burring binding, binding structure and burring forming punch
JP2001198634A (en) * 2000-01-17 2001-07-24 Shinko Seisakusho:Kk Burring punch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1044283A (en) * 1912-03-14 1912-11-12 William D Stanger Die for forming metal staying-strips.
GB1462482A (en) * 1973-01-10 1977-01-26 Nefab Plywoodemballage Ab Production of sheet metal securing plates
US3925875A (en) * 1973-05-29 1975-12-16 Angeles Metal Trim Co Method of constructing a prefabricated wall module
JPH09201627A (en) * 1996-01-23 1997-08-05 Ricoh Co Ltd Burring punch and burring
JPH09267140A (en) * 1996-04-01 1997-10-14 Nissan Motor Co Ltd Method for joining metal plate and punch to be used thereof
JP2002321023A (en) * 2001-04-26 2002-11-05 Amada Co Ltd Metal mold for punching

Also Published As

Publication number Publication date
JP4746904B2 (en) 2011-08-10
EP1710027B1 (en) 2009-12-23
JP2006289399A (en) 2006-10-26
EP1710027A2 (en) 2006-10-11

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