US2540700A - Method and device for hardening of articles by high-frequency currents - Google Patents

Method and device for hardening of articles by high-frequency currents Download PDF

Info

Publication number
US2540700A
US2540700A US730828A US73082847A US2540700A US 2540700 A US2540700 A US 2540700A US 730828 A US730828 A US 730828A US 73082847 A US73082847 A US 73082847A US 2540700 A US2540700 A US 2540700A
Authority
US
United States
Prior art keywords
heating
hardening
heated
inductor
carrier means
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
US730828A
Other languages
English (en)
Inventor
Stivin Jiri
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2540700A publication Critical patent/US2540700A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a device for hardening of articles, such as journals or bearing journals of crankshafts or the like, by the use of high frequency currents.
  • high frequency currents are often used for heating of surface layers to be hardened, said high frequency currents being induced in such layers by means of a so called heating inductor, having the shape of a coil surrounding the heated article and supplied by high frequency currents in any suitable way.
  • Fig. 1 shows in vertical section a device according to the present invention adapted for hardening a crankshaft journal
  • Fig. 1 shows the general layout of the device, adapted for the treatment of crankshaft journals.
  • suitable mountings such as columns are secured on which a bottom plate 3 of a quen hing container marked generally by the reference numeral d, which will be more fully described hereinafter, is mounted adjustably in vertical direction.
  • the bottom plate 3 is supported by suitable supports 5, adapted to slide along the columns 2 and to be secured in the desired position by any suitable means, such as screws, clamps or the like (not shown).
  • the container l for the quenching liquid consists of a lower part I I shaped as a bellows so as to allow the bottom plate 3 to be moved up and down without the position of the fixed upper part l2 of the container being changed.
  • the container is filled with a suitable quenching liquid up to a desired level, determined by an aperture [3, which can be closed by any suitable closing means, which are not shown in the drawings.
  • a circular space [4 is provided by an annular partition [5.
  • a displacing body l6 of any suitable shape and size is mounted for vertical movement in the circular space M, for instance by means of a hydraulic or pneumatic device, consisting of a cylinder I! and piston E8, to which the displacing body I6 is secured.
  • the heating portion of the device comprises a transformer consisting of a primary winding 19 and of a secondary winding 20 which in the embodiment shown has the shape of a split ring 20.
  • the ring 2! is secured to a vertical rod 2 I, guided for vertical movement in suitable guides 22, 22.
  • a transverse slide 23 is arranged, cooperating with an eccentric or cam 24, driven by any suitable driving means 25.
  • eccentric 24 reciprocal movement in vertical direction is imparted to the rod 2
  • Leads 28, 26 extend from the split ends of the ring 29.. On their lower ends the leads are provided with a heating head or inductor, denoted generally by 27 in Fig. l.
  • the heating head as shown in Fig. 2 consists of two halves or jaw portions 27, Zl mounted for swinging movement around pivots 28, 28'. At the other end of the heating head a suitable aperture 29 is provided for the reception of the journal to be heated.
  • the described device operates as follows:
  • the crankshaft l the journals of which have to be hardened is placed between the pins 5 and 8; the bottom plate 3 together with the arm 9 are then simultaneously raised or lowered to such an extent, that the journal to be hardened is brought against the heating head 2?.
  • the container 4 is filled with quenching liquid and the driving device for the eccentric 24 brought into operation, so that the heating head 2i carries out a harmonic motion along the journal to be hardened. If current is now supplied to the transformer, the heating head is brought into operation, heating the surface layers of the journal to be hardened by high frequency currents.
  • a number of heating heads (or halves of heating heads) having apertures 29 of different diameter may be mounted for rotation, so as to achieve adaptability of the device for various diameters of the journals to be hardened.
  • the heating head 2'! during its harmonic reciprocal movement heats mainly the end portions of the journal; this is however, desirable, because from the end portions heat is being withdrawn by the crank arms.
  • the heating head In order to achieve correct centering and movement of the heating head 2i, with respect to the heated journal, the heating head is guided directly on the journal.
  • the halves or jaw portions 217 of the heating head which are hollow and cooled a liquid flowing through them are provided on their surface with a layer of insulating enamel iiii, applied on copper, said enamel insulating the heating head with respect to the heated journal.
  • the enamel serves also for securing to the heating head U-shaped gibs 3!, preferably made of copper, which abut against the heated journal and are thus guided along the same during the reciprocal movement of the heating head.
  • a further example of an application of the present invention is the hardening of fiat articles, such as gear-teeth.
  • the hardening of gearteeth, particularly of larger sizes, has heretofore been attended with considerable difficulties.
  • Fig. 4 shows an individual hardening of gear teeth according to the invention.
  • the teeth 32 of a gear 33 which maybe mounted in a way similar to that used in connection with the crankshaft l according to Fig. l, are heated by a suitable heating head ?u'i.
  • the heating head may be broadly similar to the heating head 2? according to Figs. 1 and 2 or 3, but its operative end has to be shaped so as to conform to the shape of the teeth to be hardened. Also in this case it is possible to arrange a plurality of heating heads with different shapes, so as to render the device capable of treating gear teeth of different shapes and sizes.
  • the heating head 3 is mounted on leads 35, similar to the leads 26. The arrangement of the remaining parts may be similar to those according to Fig. 1.
  • the heating head During the heating operation the heating headreceives reciprocal movement in axial direction in the tooth space.
  • This arrangement permits to achieve the best distribution of heat and the most advantageous course of hardening of the tooth-sides by a suitable formation of the heating head, as in such a case such parts which have to retain their toughness or ductility, need not be hardened.
  • the heating head enters either from outside or from above the space between two teeth, the sides of which have to be hardened, and after a sufficient heating the quenching operation is carried out as disclosed above.
  • the heating head 36 is then withdrawn from the tooth-space, the gear 33 revolved through the desired angle and the sides of a further tooth-space subjected to treatment.
  • an induction heating apparatus in combination, a stationary frame; carrier means arranged for movement on said stationary frame; a stationary primary coil; a secondary carried by said carrier means, said secondary together with said primary constituting a transformer for supplying an induced heating current; a heating inductor carried by said carrier means, said heating inductor being of a thickness allowing reciprocation along the length of the part being heated; means for passing an induced current from said secondary to said heating inductor; and drive means for imparting continuously reciprocating movement to said carrier means whereby said heating inductor may be moved along the part to be heated for reciprocation between the two ends thereof, the axial length of one of said coils being less than the axial length of the other of said coils in order to maintain electrical coupling between said primary and secondary coils during the entire period of reciprocation of said carrier means and said secondary coil.
  • an induction heating apparatus in combination, a stationary frame; carrier means arranged for movement on said stationary frame; a stationary primary coil; a secondary carried by said carrier means, said secondary together with said primary constituting a transformer for supplying an induced heating current; a heating inductor adapted for reciprocation along the length of the parts being heated; a rigid connection between said secondary and said heating inductor, the said connection supporting said heating inductor and simultaneously supplying an induced current thereto from said secondary; and drive means for imparting continuously reciprocating movement to said carrier means whereby said heating inductor may be moved along the part to be heated for reciprocation between the two ends thereof, the axial length of one of said coils being less than the axial length of the other of said coils in order to maintain electrical coupling between said primary and secondary coils during the entire period of reciprocation of said carrier means and said secondary coil.
  • an induction heating apparatus in combination, a stationary frame; carrier means arranged for movement on said stationary frame; a stationary primary coil; a secondary carried by said carrier means, said secondary together with said primary constituting a transformer for supplying an induced heating current; a heating inductor adapted for reciprocation along the length of the parts being heated; a rigid connection between said secondary and said heating inductor, the said connection supporting said heating inductor and simultaneously supplying an induced current thereto from said secondary; and drive means for imparting continuously reciprocating harmonic movement to said carrier means whereby said heating inductor'may be moved along the part to be heated for reciprocation between the two ends thereof, the axial length of one of said coils being less than the axial length of the other of said coils in order to maintain electrical coupling between said primary and secondary coils during the entire period of reciprocation of said carrier means and said secondary coil.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
US730828A 1945-12-14 1947-02-25 Method and device for hardening of articles by high-frequency currents Expired - Lifetime US2540700A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CS2540700X 1945-12-14
CS260663X 1945-12-14
CS10346X 1946-03-01

Publications (1)

Publication Number Publication Date
US2540700A true US2540700A (en) 1951-02-06

Family

ID=27616976

Family Applications (1)

Application Number Title Priority Date Filing Date
US730828A Expired - Lifetime US2540700A (en) 1945-12-14 1947-02-25 Method and device for hardening of articles by high-frequency currents

Country Status (2)

Country Link
US (1) US2540700A (de)
CH (1) CH260663A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1092578B (de) * 1956-08-30 1960-11-10 Otto Junker Fa Zylindrische Induktionsspule fuer Niederfrequenz und Verfahren mit der Vorrichtung
DE1157722B (de) * 1958-09-04 1963-11-21 Const Electr De Charleroe Atel Verfahren und Vorrichtung zur Induktionserhitzung von langen stangenfoermigen Werkstuecken
US3488236A (en) * 1966-12-22 1970-01-06 Beaver Precision Prod Method and apparatus for heat treating a metallic workpiece
US3504151A (en) * 1967-05-20 1970-03-31 Aeg Elotherm Gmbh Apparatus and method of inductively heating elongated workpieces
US20090188910A1 (en) * 2008-01-29 2009-07-30 Caterpillar Inc. Heat treatment system and method using active feedback

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1711633A (en) * 1926-03-30 1929-05-07 Dornseif Hugo Apparatus for hardening the runners of ice skates
US2202159A (en) * 1937-03-17 1940-05-28 Marcalus Nicholas Waxing machine
US2202759A (en) * 1935-12-14 1940-05-28 Ohio Crankshaft Co Heat treatment of shafts and the like
US2223902A (en) * 1936-08-20 1940-12-03 Howard E Somes Transformer distributing system
US2240493A (en) * 1937-12-31 1941-05-06 Ohio Crankshaft Co Wheel hardening apparatus
US2255103A (en) * 1938-10-15 1941-09-09 Ohio Crankshaft Co Equipment for electric heating
US2267001A (en) * 1940-12-16 1941-12-23 Ohio Commw Eng Co Method and apparatus for drying paint
US2293047A (en) * 1935-12-31 1942-08-18 Ohio Crankshaft Co Apparatus for zone hardening
US2329944A (en) * 1942-08-14 1943-09-21 Induction Heating Corp Method for securing in place radiating fins and the like
US2353130A (en) * 1943-04-14 1944-07-11 Induction Heating Corp Induction heating apparatus
US2368809A (en) * 1935-12-14 1945-02-06 Ohio Crankshaft Co Progressive heat-treating apparatus
US2402186A (en) * 1943-04-05 1946-06-18 Fed Telephone & Radio Corp Progressive induction heating apparatus
US2404987A (en) * 1944-04-19 1946-07-30 Induction Heating Corp Induction heating and quenching device
US2415856A (en) * 1943-08-11 1947-02-18 Budd Co Quench head
US2460855A (en) * 1945-01-11 1949-02-08 Ohio Crankshaft Co Electromagnetic induction heattreating apparatus
US2464727A (en) * 1944-06-07 1949-03-15 Sunbeam Corp High-frequency inductor heattreating apparatus

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1711633A (en) * 1926-03-30 1929-05-07 Dornseif Hugo Apparatus for hardening the runners of ice skates
US2368809A (en) * 1935-12-14 1945-02-06 Ohio Crankshaft Co Progressive heat-treating apparatus
US2202759A (en) * 1935-12-14 1940-05-28 Ohio Crankshaft Co Heat treatment of shafts and the like
US2293047A (en) * 1935-12-31 1942-08-18 Ohio Crankshaft Co Apparatus for zone hardening
US2223902A (en) * 1936-08-20 1940-12-03 Howard E Somes Transformer distributing system
US2202159A (en) * 1937-03-17 1940-05-28 Marcalus Nicholas Waxing machine
US2240493A (en) * 1937-12-31 1941-05-06 Ohio Crankshaft Co Wheel hardening apparatus
US2255103A (en) * 1938-10-15 1941-09-09 Ohio Crankshaft Co Equipment for electric heating
US2267001A (en) * 1940-12-16 1941-12-23 Ohio Commw Eng Co Method and apparatus for drying paint
US2329944A (en) * 1942-08-14 1943-09-21 Induction Heating Corp Method for securing in place radiating fins and the like
US2402186A (en) * 1943-04-05 1946-06-18 Fed Telephone & Radio Corp Progressive induction heating apparatus
US2353130A (en) * 1943-04-14 1944-07-11 Induction Heating Corp Induction heating apparatus
US2415856A (en) * 1943-08-11 1947-02-18 Budd Co Quench head
US2404987A (en) * 1944-04-19 1946-07-30 Induction Heating Corp Induction heating and quenching device
US2464727A (en) * 1944-06-07 1949-03-15 Sunbeam Corp High-frequency inductor heattreating apparatus
US2460855A (en) * 1945-01-11 1949-02-08 Ohio Crankshaft Co Electromagnetic induction heattreating apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1092578B (de) * 1956-08-30 1960-11-10 Otto Junker Fa Zylindrische Induktionsspule fuer Niederfrequenz und Verfahren mit der Vorrichtung
DE1157722B (de) * 1958-09-04 1963-11-21 Const Electr De Charleroe Atel Verfahren und Vorrichtung zur Induktionserhitzung von langen stangenfoermigen Werkstuecken
US3488236A (en) * 1966-12-22 1970-01-06 Beaver Precision Prod Method and apparatus for heat treating a metallic workpiece
US3504151A (en) * 1967-05-20 1970-03-31 Aeg Elotherm Gmbh Apparatus and method of inductively heating elongated workpieces
US20090188910A1 (en) * 2008-01-29 2009-07-30 Caterpillar Inc. Heat treatment system and method using active feedback

Also Published As

Publication number Publication date
CH260663A (de) 1949-03-31

Similar Documents

Publication Publication Date Title
GB1398232A (en) Method of and apparatus for producing a ring gear and support assembly
US3944446A (en) Method of inductively heating and quench hardening camshafts
US2202759A (en) Heat treatment of shafts and the like
US2540700A (en) Method and device for hardening of articles by high-frequency currents
KR19980018686A (ko) 부싱 열처리 방법 및 장치
US2556236A (en) Heat-treating method and product
US2643325A (en) Progressive high-frequency heating of variable-dimension shafts
KR20010098382A (ko) 크랭크샤프트의 고주파 템퍼링방법 및 장치
US2255103A (en) Equipment for electric heating
US4090698A (en) Method and apparatus of inductively heating elongated workpieces
CN208087675U (zh) 一种齿轮淬火设备
US3784780A (en) Apparatus and method of inductively heating spaced surfaces on an elongated workpiece
US2479934A (en) Heat treating
US4459451A (en) Induction hardening apparatus and process for the use thereof
JP7311811B2 (ja) 移動焼入れ装置及び移動焼入れ方法
JP2011231371A (ja) 熱処理方法及び熱処理装置
US2446202A (en) Induction heat-treatment
US2288035A (en) Heat treating apparatus
US2794894A (en) Induction heat-treating apparatus
JP2000087134A (ja) 段付き軸体の誘導加熱コイルおよび焼入装置
US2524044A (en) Apparatus for heat-treating gear teeth
US4123644A (en) Device for inductively heating cylindrical surfaces
JPH03226524A (ja) クランクシャフトの高周波焼入れ・焼戻し方法
US2180038A (en) Apparatus for heat treating
US3556877A (en) Method for hardening a tubular shaped structure