EP0321880A3 - Method and apparatus for forging toothed wheels - Google Patents

Method and apparatus for forging toothed wheels Download PDF

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Publication number
EP0321880A3
EP0321880A3 EP88121100A EP88121100A EP0321880A3 EP 0321880 A3 EP0321880 A3 EP 0321880A3 EP 88121100 A EP88121100 A EP 88121100A EP 88121100 A EP88121100 A EP 88121100A EP 0321880 A3 EP0321880 A3 EP 0321880A3
Authority
EP
European Patent Office
Prior art keywords
die
end areas
teeth
load capacity
gears
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.)
Withdrawn
Application number
EP88121100A
Other languages
German (de)
French (fr)
Other versions
EP0321880A2 (en
Inventor
Eckart Prof. Dr. Ing. Doege
B. Dipl.-Ing. Adams
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.)
Doege Eckart Prof Dr-Ing
Original Assignee
Doege Eckart Prof Dr-Ing
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 Doege Eckart Prof Dr-Ing filed Critical Doege Eckart Prof Dr-Ing
Publication of EP0321880A2 publication Critical patent/EP0321880A2/en
Publication of EP0321880A3 publication Critical patent/EP0321880A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/30—Making machine elements wheels; discs with gear-teeth

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

Beim Schmieden von Zahnrädern aus massivem Metall be­ steht die Schwierigkeit, daß durch Reibung des Roh­ lingsmaterials an der Matrize die axialen Endbereiche des Zahnrades nicht vollständig ausgeformt werden, so daß die Tragfähigkeit der Zähne in den Endbereichen begrenzt ist. When forging solid metal gears there is the difficulty that by rubbing the raw material on the die, the axial end areas of the gear are not fully formed, so that the load capacity of the teeth in the end areas is limited.

Der Erfindung liegt die Aufgabe zugrunde, ein Schmiede­ verfahren anzugeben, mit dem in einem einstufigen Her­ stellungsprozeß Zahnräder mit hoher Tragfähigkeit der Zähne hergestellt werden können. The invention has for its object a forge to specify the process with which in a one-step Her Positioning process gears with high load capacity Teeth can be made.

Bei dem erfindungsgemäßen Verfahren tauchen von beiden Seiten her Preßstempel (20,23) in die Matrize (12) ein, so daß der Rohling (27) von entgegengesetzten Seiten her verformt wird. Dadurch tritt ein Materialfluß auch in die Endbereiche der Verzahnungsgravur (13) ein. Bei einer einfachwirkenden Presse ist die Matrize (12) ver­ tikal verschiebbar angeordnet und der eine Preßstempel (20) ist beim Preßvorgang feststehend. Es können Zahn­ räder mit und ohne Mittelloch in einem einzigen Arbeits­ schritt hergestellt werden. In the method according to the invention, diving from both Sides of the die (20, 23) into the die (12), so that the blank (27) from opposite sides is deformed here. This also causes a flow of material into the end areas of the tooth engraving (13). At a single-acting press is the die (12) ver arranged tically displaceable and a press ram (20) is fixed during the pressing process. It can tooth wheels with and without center hole in one work step.

EP88121100A 1987-12-19 1988-12-16 Method and apparatus for forging toothed wheels Withdrawn EP0321880A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3743231 1987-12-19
DE19873743231 DE3743231A1 (en) 1987-12-19 1987-12-19 METHOD AND DEVICE FOR FORGING GEARS

Publications (2)

Publication Number Publication Date
EP0321880A2 EP0321880A2 (en) 1989-06-28
EP0321880A3 true EP0321880A3 (en) 1990-08-29

Family

ID=6343067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121100A Withdrawn EP0321880A3 (en) 1987-12-19 1988-12-16 Method and apparatus for forging toothed wheels

Country Status (2)

Country Link
EP (1) EP0321880A3 (en)
DE (1) DE3743231A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5177991A (en) * 1991-07-28 1993-01-12 Presnet Corporation Method of and apparatus for coining tapers at opposite ends of a sleeve member
DE10143993A1 (en) * 2001-09-07 2003-04-03 Zahnradfabrik Friedrichshafen Centering device for inner and outer components has at least one guide device between components
DE102004058372B4 (en) * 2004-12-03 2008-10-09 Daimler Ag Method and device for electrochemical machining
CN103157740B (en) * 2013-03-08 2015-04-08 西安建筑科技大学 Straight gear precise forging technology based on flow control forming principle and die

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767438A (en) * 1952-04-14 1956-10-23 Borg Warner Method and apparatus for making torque-transmitting elements
DE1752023A1 (en) * 1967-03-29 1971-04-29 Hatebur Ag F B Tool arrangement for the production of extruded parts of partially reduced cross-section
FR2607040A1 (en) * 1986-11-21 1988-05-27 Renault Method and tooling for manufacturing, by sintering-forging, mechanical components having a helical toothing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588933A (en) * 1968-06-19 1971-06-29 George J Shinopulos Method and apparatus for simultaneously upset forming both ends of a ductile material rod blank or the like
DE3533426A1 (en) * 1985-09-19 1987-03-26 Rainer Wadewitz Method and apparatus for the production of formed parts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767438A (en) * 1952-04-14 1956-10-23 Borg Warner Method and apparatus for making torque-transmitting elements
DE1752023A1 (en) * 1967-03-29 1971-04-29 Hatebur Ag F B Tool arrangement for the production of extruded parts of partially reduced cross-section
FR2607040A1 (en) * 1986-11-21 1988-05-27 Renault Method and tooling for manufacturing, by sintering-forging, mechanical components having a helical toothing

Also Published As

Publication number Publication date
EP0321880A2 (en) 1989-06-28
DE3743231A1 (en) 1989-06-29

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