DE2226530B2 - Induction hardening of crankshafts - using two separate operations for hardening the bearing surfaces and their fillets - Google Patents

Induction hardening of crankshafts - using two separate operations for hardening the bearing surfaces and their fillets

Info

Publication number
DE2226530B2
DE2226530B2 DE19722226530 DE2226530A DE2226530B2 DE 2226530 B2 DE2226530 B2 DE 2226530B2 DE 19722226530 DE19722226530 DE 19722226530 DE 2226530 A DE2226530 A DE 2226530A DE 2226530 B2 DE2226530 B2 DE 2226530B2
Authority
DE
Germany
Prior art keywords
crankshaft
hardening
fillets
bearing surface
heated
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.)
Ceased
Application number
DE19722226530
Other languages
German (de)
Other versions
DE2226530A1 (en
Inventor
Gerhard Dr.-Ing.; Reinke Friedhelm Dr.-Ing.; 5630 Remscheid Seulen
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.)
SMS Elotherm GmbH
Original Assignee
AEG Elotherm GmbH
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 AEG Elotherm GmbH filed Critical AEG Elotherm GmbH
Priority to DE19722226530 priority Critical patent/DE2226530B2/en
Publication of DE2226530A1 publication Critical patent/DE2226530A1/en
Publication of DE2226530B2 publication Critical patent/DE2226530B2/en
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

A bearing surface and its adjacent fillets on a crankshaft are hardened by induction heating in two stages:- (a) A curved inductor is eployed to heat the two fillets on the inside of a crank to form austenite, followed by quenching; the crankshaft is stationary during this stage of the process. (b) A second inductor is then used to heat the bearing surface while the crankshaft is rotated, so that austenite is formed, and the bearing surface is quenched. By employing two separate hardening operations, the desired hardness profile can be consistently obtd. on both the crank pins and journals on a crankshaft.

Description

Claims (1)

Patentanspruch:Claim: Verfahren zur induktionshärtung einer Lagerlauffläche und des sich anschließenden Hohlkehlenbereichs einer Kurbelwelle durch Anordnen schleifenartig ausgebildeter Induktionsheizleiter im Koppelabstand von den zu erhitzenden Flächen, Aufheizen der zu härtenden Kurbelwellenbereiche auf eine Austenitisierungstemperatur und anschließendes Abschrecken der erhitzten Bereiche, dadurch gekennzeichnet, daß der Hohlkehlenbereich beim Stillstand der Weile durch einen den Hohlkehlenbereich an der Innenseite der Wellenkröpfung bogenförmig überdeckenden Induktor erhitzt und danach abgeschreckt wird und daß danach die Lagerlauffläche irn Umlaufverfahren mittels eines anderen Induktors gesondert erhitzt und danach abgeschreckt wird.Process for induction hardening of a bearing surface and the adjoining fillet area of a crankshaft by arranging them in a loop trained induction heating conductor at a coupling distance from the surfaces to be heated, Heating of the crankshaft areas to be hardened to an austenitizing temperature and then Quenching the heated areas, characterized in that the fillet area at standstill for a while through the fillet area on the inside of the shaft crank arc-shaped overlapping inductor is heated and then quenched and that then the bearing surface in the circulation process heated separately by means of another inductor and then quenched.
DE19722226530 1972-05-31 1972-05-31 Induction hardening of crankshafts - using two separate operations for hardening the bearing surfaces and their fillets Ceased DE2226530B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19722226530 DE2226530B2 (en) 1972-05-31 1972-05-31 Induction hardening of crankshafts - using two separate operations for hardening the bearing surfaces and their fillets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722226530 DE2226530B2 (en) 1972-05-31 1972-05-31 Induction hardening of crankshafts - using two separate operations for hardening the bearing surfaces and their fillets

Publications (2)

Publication Number Publication Date
DE2226530A1 DE2226530A1 (en) 1973-12-06
DE2226530B2 true DE2226530B2 (en) 1977-09-22

Family

ID=5846460

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19722226530 Ceased DE2226530B2 (en) 1972-05-31 1972-05-31 Induction hardening of crankshafts - using two separate operations for hardening the bearing surfaces and their fillets

Country Status (1)

Country Link
DE (1) DE2226530B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027828A1 (en) * 1979-10-24 1981-05-06 Maschinenfabrik Alfing Kessler GmbH Inductor for heating rotating metal workpieces, in particular crankshafts, for the purpose of surface hardening at varying operational depths
DE3732006C1 (en) * 1987-09-23 1988-04-07 Daimler Benz Ag Inductor in particular for hardening crankshafts

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19808763C1 (en) * 1998-03-02 1999-04-22 Aeg Elotherm Gmbh Apparatus for hardening cylindrical bearing surfaces of shaft
EP1865080A1 (en) * 2006-06-06 2007-12-12 Siemens Aktiengesellschaft Process for applying internal compressive stresses in a shaft, in particular in shaft chamferings
DE102016005833A1 (en) 2016-04-08 2016-12-08 Daimler Ag Shaft, in particular crankshaft, and method for producing such a shaft
CN113930594A (en) * 2021-10-19 2022-01-14 一汽解放汽车有限公司 Quenching inductor, quenching induction device and quenching treatment method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027828A1 (en) * 1979-10-24 1981-05-06 Maschinenfabrik Alfing Kessler GmbH Inductor for heating rotating metal workpieces, in particular crankshafts, for the purpose of surface hardening at varying operational depths
DE3732006C1 (en) * 1987-09-23 1988-04-07 Daimler Benz Ag Inductor in particular for hardening crankshafts

Also Published As

Publication number Publication date
DE2226530A1 (en) 1973-12-06

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Legal Events

Date Code Title Description
8235 Patent refused