US2293048A - Method for zone hardening - Google Patents

Method for zone hardening Download PDF

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Publication number
US2293048A
US2293048A US326946A US32694640A US2293048A US 2293048 A US2293048 A US 2293048A US 326946 A US326946 A US 326946A US 32694640 A US32694640 A US 32694640A US 2293048 A US2293048 A US 2293048A
Authority
US
United States
Prior art keywords
journal
inductor
arm
zone
heating
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
US326946A
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English (en)
Inventor
Francis S Denneen
William C Dunn
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.)
Ohio Crankshaft Co
Original Assignee
Ohio Crankshaft Co
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
Priority claimed from US56870A external-priority patent/US2293047A/en
Priority to DED73547D priority Critical patent/DE673369C/de
Application filed by Ohio Crankshaft Co filed Critical Ohio Crankshaft Co
Priority to US326946A priority patent/US2293048A/en
Application granted granted Critical
Publication of US2293048A publication Critical patent/US2293048A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/362—Coil arrangements with flat coil conductors
    • 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
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12458—All metal or with adjacent metals having composition, density, or hardness gradient

Definitions

  • Thepresent invention relating as indicated to a method for zone hardening, is a division of our co-pending application No. 56,870, filed December 31, 1935, for Apparatus for zone hardening.
  • a further object of this invention has been to provide apparatus for practicing a method of the character described which is capable of being accurately andquickly set-up.
  • Fig. 1 is an'end view partially fragmentary and partially sectional of apparatus forpracticing this invention.
  • Fig. 2 is a partially fragmentary section taken on the line 2--2 of Fig. 1.
  • Figs. 1 and 2 show a specific application of this invention to a crankshaft crankpin which is to be hardened.
  • the crankshaft which is fragmentarily shown, comprises main bearings I0, pin II and interconnecting, cheeks I2. It is to be understood that crankshaft is used herein by way of illustration and not limitation.
  • the inductor members I 4 and I5 have jackets 'I1 and I8 attached by screws 20 and 2l. Suitable insulation gaskets 23 of rubber or other resilient material serve as means for preventing loss of the quenching medium and to fconflne the flow of current to the inductor members adjacent to the pin.
  • l The lower inductor member I5 is attached by means of bolt 25to the extension 26 which is supported by the pin 28 and the upper inductor member I4 is attached to the hinge ported in the frame carrying the coils and other related parts, and which is not shown.
  • the pin Il is placed in an eccentric position relative to the inductors so that the least clearance between the inductor members and shaft is between the arms or cheeks.
  • the clearance at 48 should be of the order of .080 of an inch, at 49 it should be .040 and at 50 and 5
  • Small cylindrical spacers made of lava or other insulating material as shown at 53 are usually inserted to insure the desired spacing.
  • steps comprising placing an inductor in substantially closely spaced relation with ⁇ the surface zone to induce heating current in the zone, and then shiftlng the inductor to provide a non-uniform spacing of the inductor and thearticle to eiIect a uniform heating of the surface zone.
  • a method of equalizing heating Aof a periodically varying flux field in a surface zone of an article, the article having a projecting member adjacent to the surface zone comprising providing an inductor adapted to encircle a part of the article, the inductor having spaced terminals attached thereto, bringing the inductor into encircling relationship with the article, locating the space between the terminals of the inductor at a point substantially on an opposite sideof the article to the aforesaid projecting member, then shifting 4the inductor to bring a part of the inductor' into closer relation with a side of the article adjacent to the projection and to bring another part ofthe inductor, into more distant relationl with an opposite side oi.' the article to substantially equalize heating in the said sides of the article, and supplying inducing current to the terminals of the inductor.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Heat Treatment Of Articles (AREA)
US326946A 1935-12-31 1940-03-30 Method for zone hardening Expired - Lifetime US2293048A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DED73547D DE673369C (de) 1935-12-31 1936-09-25 Verfahren und Induktor zum Oberflaechenhaerten von Kurbelwellenzapfen o. dgl.
US326946A US2293048A (en) 1935-12-31 1940-03-30 Method for zone hardening

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US673369XA 1935-12-31 1935-12-31
US56870A US2293047A (en) 1935-12-31 1935-12-31 Apparatus for zone hardening
US326946A US2293048A (en) 1935-12-31 1940-03-30 Method for zone hardening

Publications (1)

Publication Number Publication Date
US2293048A true US2293048A (en) 1942-08-18

Family

ID=27369111

Family Applications (1)

Application Number Title Priority Date Filing Date
US326946A Expired - Lifetime US2293048A (en) 1935-12-31 1940-03-30 Method for zone hardening

Country Status (2)

Country Link
US (1) US2293048A (de)
DE (1) DE673369C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800809A (en) * 1953-09-04 1957-07-30 West Bend Aluminum Co Induction hardened crankpins

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE820946C (de) * 1939-06-23 1952-01-07 Deutsche Edelstahlwerke Ag Vorrichtung zum elektro-induktiven Erhitzen von metallischen Werkstuecken
DE960569C (de) * 1942-07-03 1957-03-28 Aeg Vorrichtung zur zahnweisen Erwaermung von Zahnraedern
DE881669C (de) * 1943-07-06 1953-07-02 Deutsche Edelstahlwerke Ag Oberflaechenhaerten von Werkstuecken aus Verguetungsstahl
DE957219C (de) * 1944-05-16 1957-01-31 Siemens Ag Haerte-Einrichtung mit wassergekuehltem Induktor
DE102005024292A1 (de) * 2005-05-27 2006-11-30 Volkswagen Ag Härten eines Rohteiles für eine Low Cost-Fertigung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800809A (en) * 1953-09-04 1957-07-30 West Bend Aluminum Co Induction hardened crankpins

Also Published As

Publication number Publication date
DE673369C (de) 1939-03-21

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