US2785263A - Method for the local heating of metallic work-pieces by inductive hf-heating and hf-inductor - Google Patents

Method for the local heating of metallic work-pieces by inductive hf-heating and hf-inductor Download PDF

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Publication number
US2785263A
US2785263A US334045A US33404553A US2785263A US 2785263 A US2785263 A US 2785263A US 334045 A US334045 A US 334045A US 33404553 A US33404553 A US 33404553A US 2785263 A US2785263 A US 2785263A
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United States
Prior art keywords
inductor
heating
core
work
inductive
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Expired - Lifetime
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US334045A
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English (en)
Inventor
Dirk Christiaan Van Iperen
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US Philips Corp
North American Philips Co Inc
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US Philips Corp
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Publication date
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Publication of US2785263A publication Critical patent/US2785263A/en
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    • 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
    • H05B6/365—Coil arrangements using supplementary conductive or ferromagnetic pieces

Definitions

  • the invention is based on recognition of the fact that the above-mentioned method may also be carried out in a different manner, which opens a larger range of application.
  • the relative movement is carried out in such manner that the heating zone on the work-piece constitutes a desired path.
  • the direction of the said path preferably makes an angle, more particularly of 90, with the plane passing through the U-shape of the core.
  • the heated part of the Work-piece in the vicinity of the core is provided with soldering material, which is important inter alia for the tin industry.
  • the invention furthermore relates to an HF-inductor which comprises a core, at least partly U-shaped, of the above-mentioned material and which, if desired, may be cooled artificially, and it is characterised in that the inductor is combined with a holder for soldering material to form an assembly.
  • Figs. 1, 2 and 3 show a vertical section, a side-view and a horizontal section respectively of an inductor 1 and a U-shaped core 2 which, together with a workpiece 3, substantially constitutes a closed magnetic circuit. If the work-piece is moved in the direction of arrow 4 in Fig. 3, a heating zone 5 provided between the limbs of the U-shaped core 2 traverses a path 6 (see Fig. 3). Since in this case the left-hand limb 7 (see Fig. 1) is invariably above a portion of the path which has just been heated, this limb is subject to additional heating.
  • the workpiece 3 should be pulled along in the direction of arrow 8, so that the heating zone traverses a path 9 and the above-mentioned additional heating is either suppressed or takes place to an inappreciable extent only.
  • the direction of the path makes an angle of about with the plane passing through the U-shape of the core.
  • Figs. 4 and 5 show a vertical section and a side-view respectively of an inductor 1 and a core 10, which fully surrounds the inductor on both sides.
  • the core is H-shaped and comprises plate-shaped parts 11 on both sides of the inductor, so that better concentration of the lines of force is ensured.
  • a holder 12 for soldering material for example tin wire 13 is united with the inductor to form an assembly, so that the soldering material is provided as a narrow tin band on the work-piece, for example, of white iron, when the work-piece 3 is moved in the direction of the arrow 14.
  • a method for the local heating of a metallic workpiece by inductive high frequency heating with the use of an inductor including a U-shaped core having a high electrical resistance at high frequency comprising placing the free ends of the legs of said core in engagement with said work-piece to form a closed magnetic circuit, inserting at least a part of said inductor in the space between the legs of said core, moving the work-piece relatively to said core so that the heating zone on said work-piece constitutes a desired path, and providing said heated zone with soldering material applied along said heated path but immediately in front of said heating zone.
  • a high frequency inductor comprising a substantially U-shaped core positioned around said inductor and composed of a material having a high electric resistance at high frequencies, and a holder for a soldering element secured to said core.
  • a high frequency U-shaped inductor comprising a substantially H-shaped core composed of a material having a high electric resistance at a high frequency, said core being provided with two spaced plate-shape parts on each side of the inductor thereby enclosing said entire inductor and a connecting part in the space between the legs of said U-shaped inductor.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
US334045A 1952-03-28 1953-01-29 Method for the local heating of metallic work-pieces by inductive hf-heating and hf-inductor Expired - Lifetime US2785263A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL315656X 1952-03-28
NL2785263X 1952-03-28

Publications (1)

Publication Number Publication Date
US2785263A true US2785263A (en) 1957-03-12

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US334045A Expired - Lifetime US2785263A (en) 1952-03-28 1953-01-29 Method for the local heating of metallic work-pieces by inductive hf-heating and hf-inductor

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US (1) US2785263A (en(2012))
BE (1) BE518744A (en(2012))

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3060067A (en) * 1959-11-16 1962-10-23 Revere Copper & Brass Inc Induction heating with an internally cooled conductor having a triangular cross-section
US3119917A (en) * 1961-01-04 1964-01-28 United States Steel Corp Induction heating device
US3242299A (en) * 1963-10-17 1966-03-22 Ohio Crankshaft Co Inductor for induction heating apparatus
US3872275A (en) * 1973-12-12 1975-03-18 Thermatool Corp Forge welding with induction coil heating
US3883712A (en) * 1973-10-01 1975-05-13 Illinois Tool Works Induction heating system
US4100387A (en) * 1975-08-30 1978-07-11 Aeg-Elotherm, G.M.B.H. Apparatus for the inductive heating of workpieces especially for the heating of cam shafts
US4185183A (en) * 1976-06-26 1980-01-22 Toyo Aluminum K.K. Induction heating apparatus with adjustable flux concentrators
EP0108574A1 (en) * 1982-11-08 1984-05-16 Armco Advanced Materials Corporation Radio frequency induction heating device
WO1985004069A1 (en) * 1984-03-06 1985-09-12 Metcal, Inc. Heat treatment with an autoregulating heater
US4623401A (en) * 1984-03-06 1986-11-18 Metcal, Inc. Heat treatment with an autoregulating heater
WO1997022523A1 (en) * 1995-12-20 1997-06-26 Tetra Laval Holdings & Finance S.A. A method and device for accomplishing a joint of polymer lined aluminium
WO1997022524A1 (en) * 1995-12-20 1997-06-26 Tetra Laval Holdings & Finance S.A. A method and device at a longitudinal joint sealing of a package blank
FR2750436A1 (fr) * 1996-06-27 1998-01-02 Renault Procede et dispositif de durcissement de surface d'une piece mecanique
DE202019102179U1 (de) 2019-04-16 2019-05-28 Te Connectivity Belgium Bvba Lötkopf und Lötvorrichtung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US458163A (en) * 1891-08-25 Alternating-electric-current heater
US2484650A (en) * 1945-06-25 1949-10-11 Western Electric Co Induction brazing apparatus
US2493950A (en) * 1944-12-01 1950-01-10 Gen Motors Corp High-frequency inductive welding apparatus
GB642292A (en) * 1947-09-05 1950-08-30 Jiri Stivin A method and device for concentrated heating by induction currents
US2528758A (en) * 1948-07-10 1950-11-07 Linde Air Prod Co Gas shielded induction fusion welding process
US2541416A (en) * 1947-07-26 1951-02-13 Eastman Kodak Co Heated drying roller
GB666381A (en) * 1948-11-30 1952-02-13 Marocaine Tech Et Commerciale Method and apparatus for welding by means of electro-magnetic induction heating
US2599086A (en) * 1948-04-20 1952-06-03 Asea Ab Induction heating
US2606997A (en) * 1950-06-16 1952-08-12 Asea Ab High-frequency heating tool
DE857835C (de) * 1941-11-05 1952-12-01 Deutsche Edelstahlwerke Ag Vorrichtung zum elektro-induktiven Aufheizen von Kanten oder Vorspruengen metallischer Werkstuecke

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US458163A (en) * 1891-08-25 Alternating-electric-current heater
DE857835C (de) * 1941-11-05 1952-12-01 Deutsche Edelstahlwerke Ag Vorrichtung zum elektro-induktiven Aufheizen von Kanten oder Vorspruengen metallischer Werkstuecke
US2493950A (en) * 1944-12-01 1950-01-10 Gen Motors Corp High-frequency inductive welding apparatus
US2484650A (en) * 1945-06-25 1949-10-11 Western Electric Co Induction brazing apparatus
US2541416A (en) * 1947-07-26 1951-02-13 Eastman Kodak Co Heated drying roller
GB642292A (en) * 1947-09-05 1950-08-30 Jiri Stivin A method and device for concentrated heating by induction currents
US2599086A (en) * 1948-04-20 1952-06-03 Asea Ab Induction heating
US2528758A (en) * 1948-07-10 1950-11-07 Linde Air Prod Co Gas shielded induction fusion welding process
GB666381A (en) * 1948-11-30 1952-02-13 Marocaine Tech Et Commerciale Method and apparatus for welding by means of electro-magnetic induction heating
US2606997A (en) * 1950-06-16 1952-08-12 Asea Ab High-frequency heating tool

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3060067A (en) * 1959-11-16 1962-10-23 Revere Copper & Brass Inc Induction heating with an internally cooled conductor having a triangular cross-section
US3119917A (en) * 1961-01-04 1964-01-28 United States Steel Corp Induction heating device
US3242299A (en) * 1963-10-17 1966-03-22 Ohio Crankshaft Co Inductor for induction heating apparatus
US3883712A (en) * 1973-10-01 1975-05-13 Illinois Tool Works Induction heating system
US3872275A (en) * 1973-12-12 1975-03-18 Thermatool Corp Forge welding with induction coil heating
US4100387A (en) * 1975-08-30 1978-07-11 Aeg-Elotherm, G.M.B.H. Apparatus for the inductive heating of workpieces especially for the heating of cam shafts
US4185183A (en) * 1976-06-26 1980-01-22 Toyo Aluminum K.K. Induction heating apparatus with adjustable flux concentrators
EP0108574A1 (en) * 1982-11-08 1984-05-16 Armco Advanced Materials Corporation Radio frequency induction heating device
WO1985004069A1 (en) * 1984-03-06 1985-09-12 Metcal, Inc. Heat treatment with an autoregulating heater
US4623401A (en) * 1984-03-06 1986-11-18 Metcal, Inc. Heat treatment with an autoregulating heater
JPH0656793B2 (ja) * 1984-03-06 1994-07-27 メトカル・インコーポレーテッド 自動温度調節ヒータを配置してなる熱処理装置
WO1997022523A1 (en) * 1995-12-20 1997-06-26 Tetra Laval Holdings & Finance S.A. A method and device for accomplishing a joint of polymer lined aluminium
WO1997022524A1 (en) * 1995-12-20 1997-06-26 Tetra Laval Holdings & Finance S.A. A method and device at a longitudinal joint sealing of a package blank
FR2750436A1 (fr) * 1996-06-27 1998-01-02 Renault Procede et dispositif de durcissement de surface d'une piece mecanique
EP0816518A1 (fr) * 1996-06-27 1998-01-07 Renault Procédé et dispositif de durcissement de surface d'une pièce mécanique
DE202019102179U1 (de) 2019-04-16 2019-05-28 Te Connectivity Belgium Bvba Lötkopf und Lötvorrichtung

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