US3924439A - Process for the manufacture of crank-shafts - Google Patents

Process for the manufacture of crank-shafts Download PDF

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Publication number
US3924439A
US3924439A US470461A US47046174A US3924439A US 3924439 A US3924439 A US 3924439A US 470461 A US470461 A US 470461A US 47046174 A US47046174 A US 47046174A US 3924439 A US3924439 A US 3924439A
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US
United States
Prior art keywords
induction heating
heating coil
main
main induction
section
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.)
Expired - Lifetime
Application number
US470461A
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English (en)
Inventor
Roger Poncin
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.)
Elphiac SA
Original Assignee
Elphiac SA
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 Elphiac SA filed Critical Elphiac SA
Application granted granted Critical
Publication of US3924439A publication Critical patent/US3924439A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J17/00—Forge furnaces
    • B21J17/02—Forge furnaces electrically heated
    • 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
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/08—Making machine elements axles or shafts crankshafts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49286—Crankshaft making

Definitions

  • the present invention relates to a process for the manufacture of crank-shafts, comprising the heating of a cylindrical zone of a blank containing a quantity of material at least equal to that necessary for the forging of a crank-pin and of two webs associated therewith, the die forging (die stamping) of the crank pin and of its two webs, the cooling of the forged part and repetition of the process for zones of the blank adjacent the crank-pin already forged.
  • the invention also relates to a field magnet (0r inductor coil) appropriate to the said process.
  • PROCESS FOR THE MANUFACTURE OF CRANK-SHAFTS It is the object of the invention to limit to the strict minimum the length of the heated zone of the blank which is to be forged, in order to reduce the length of the blank within which the mechanical strength breaks down. It is a second object of the invention to achieve maximum economy with regard to heating energy.
  • the process according to the invention is characterised in that the selective heating of a cylindrical portion of the blank takes place in an inductor (or field magnet) comprising a main inductor coil closely surrounding the cylindrical portion of the blank contiguous to a web which has already been forged and having tightly wound turns at the web side and looser turns at the opposite side, and an auxiliary, large-diameter field magnet (or inductor) coaxial with the main field magnet (or inductor) and adapted to surround a forged web presented at an optional angle, and in that the said two main and auxiliary inductors are energised in phase.
  • the single FIGURE of the drawing shows a section taken through an inductor heating a zone of a premachined cylindrical portion of a blank.
  • a blank comprising a portion which has already been forged and which is constituted by a crank pin 1 and two webs 2 associated therewith and by a pre-machined cylindrical portion 3 is surrounded by an inductor comprising a main inductor coil 4 and an auxiliary inductor coil 5.
  • the main inductor coil 4 closely surrounds the cylindrical portion 3 of the blank.
  • the auxiliary inductor 5 is co-axial relative to the main inductor 4 and its internal diameter is sufficiently large to surround a web 2 which has already been forged and which is presented at an optional angle.
  • the main inductor comprises a portion 6 in which the turns are wound more closely and a portion 7 in which the turns are looser.
  • the length of the portion 6 is approximately half the diameter of the cylindrical portion 3 of the blank. If, in the portion 7, the number of turns or convolutions per unit length is 1, its density may be for example 1.25 turns per unit length in the portion 6, in order to obtain advantageous conditions; that data given here may vary within relatively wide limits, for example fl%.
  • the portion 6 of the main inductor 4 is located at the side of the web 2 which has already been forged. It is the object thereof to re-inforce the field at the end of the main inductor.
  • the auxiliary inductor has the same object.
  • the two inductors 4 and 5 are cut in simultaneously, the inductor 5 is cut out prior to the inductor 4 so as to achieve distribution of the desired temperature, notably a uniform temperature within narrow limits, in the portion to be forged on either side of the portion premachined to a smaller diameter of the portion 3 of the blank.
  • the inductors 4 and 5 may be embedded in heatinsulating packings, as known per se, and may be formed with pyrometric observation apertures 8. They may be mounted either to be stationary or, on the contrary, on a displacable carriage or slide.
  • a process for the stepwise forging of discrete sections of a crankshaft comprising the steps of:
  • auxiliary induction heating coil separately surrounding said previously forged web by an auxiliary induction heating coil, which is discrete from said main induction heating coil, which is of substantially larger diameter than said main induction heating coil, and which is disposed coaxially with respect thereto;

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)
  • Heat Treatment Of Articles (AREA)
US470461A 1973-05-16 1974-05-16 Process for the manufacture of crank-shafts Expired - Lifetime US3924439A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE1005046A BE799572A (fr) 1973-05-16 1973-05-16 Procede de fabrication d'arbres vilebrequins.
BE799572 1973-05-16

Publications (1)

Publication Number Publication Date
US3924439A true US3924439A (en) 1975-12-09

Family

ID=74551341

Family Applications (1)

Application Number Title Priority Date Filing Date
US470461A Expired - Lifetime US3924439A (en) 1973-05-16 1974-05-16 Process for the manufacture of crank-shafts

Country Status (7)

Country Link
US (1) US3924439A (fr)
JP (1) JPS5016658A (fr)
BE (1) BE799572A (fr)
DE (1) DE2423267C3 (fr)
FR (1) FR2229483B1 (fr)
GB (1) GB1473864A (fr)
SU (1) SU776577A3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110000905A1 (en) * 2009-07-04 2011-01-06 Doyon Gary A Application of Electric Induction Energy for Manufacture of Irregularly Shaped Shafts with Cylindrical Components Including Non-Unitarily Forged Crankshafts and Camshafts
US9095891B2 (en) 2013-02-21 2015-08-04 Dusan Milicevic Method of eliminating the heat affected zone in a welded crankshaft

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009016027A1 (de) 2009-04-02 2010-10-07 Volkswagen Ag Verfahren zur Herstellung eines Bauteils, insbesondere eines Karosserieteiles, sowie Fertigungsstraße zur Durchführung des Verfahrens

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452197A (en) * 1945-03-22 1948-10-26 Ajax Electrothermic Corp Induction furnace for variable heat patterns
US2472261A (en) * 1944-08-10 1949-06-07 Cleveland Welding Co Crankshaft and method of making same
US2669637A (en) * 1950-08-31 1954-02-16 Massey Harris Co Ltd Method and apparatus for forming crankshafts
US3684851A (en) * 1969-12-18 1972-08-15 Aeg Elotherm Gmbh Apparatus and a process for inductively heating workpieces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2472261A (en) * 1944-08-10 1949-06-07 Cleveland Welding Co Crankshaft and method of making same
US2452197A (en) * 1945-03-22 1948-10-26 Ajax Electrothermic Corp Induction furnace for variable heat patterns
US2669637A (en) * 1950-08-31 1954-02-16 Massey Harris Co Ltd Method and apparatus for forming crankshafts
US3684851A (en) * 1969-12-18 1972-08-15 Aeg Elotherm Gmbh Apparatus and a process for inductively heating workpieces

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110000905A1 (en) * 2009-07-04 2011-01-06 Doyon Gary A Application of Electric Induction Energy for Manufacture of Irregularly Shaped Shafts with Cylindrical Components Including Non-Unitarily Forged Crankshafts and Camshafts
US8247749B2 (en) 2009-07-04 2012-08-21 Inductoheat, Inc. Application of electric induction energy for manufacture of irregularly shaped shafts with cylindrical components including non-unitarily forged crankshafts and camshafts
US9095891B2 (en) 2013-02-21 2015-08-04 Dusan Milicevic Method of eliminating the heat affected zone in a welded crankshaft
US9254518B2 (en) 2013-02-21 2016-02-09 Dusan Milicevic Method of eliminating the heat-affected zone in a welded article

Also Published As

Publication number Publication date
FR2229483A1 (fr) 1974-12-13
DE2423267A1 (de) 1974-12-05
DE2423267B2 (de) 1978-05-24
JPS5016658A (en) 1975-02-21
DE2423267C3 (de) 1979-01-11
GB1473864A (en) 1977-05-18
FR2229483B1 (fr) 1978-07-13
BE799572A (fr) 1973-11-16
SU776577A3 (ru) 1980-10-30

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