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 PDFInfo
- 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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- 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
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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.
Description
March 1957 D c. AN IPEREN 785,263
V METHOD FOR THE LOCAL HEATING OF METALLIC WORK-PIECES BY INDUCTIVE HF-HEATING AND HF-INDUCTOR Filed Jan. 29, 1953 !NVENTOR DlRK CHRISTIAAN VAN IPEREN AGENT United States Patent METHOD FOR THE LOCAL HEATING OF METAL- LIC WORK-PIECES BY INDUCTEVE EF HEA'I- ING AND HF-INDUCTOR Dirk Christiaan van Iperen, Eindhoven, Netherlands, as-
signor, by mesne assignments, to North American Philips Company, Inc., New York, N. Y., a corporation of Delaware Application January 29, 1953, Serial No. 334,045
Claims priority, application Netherlands March 28, 1952 3 Claims. (Cl. 219-1041) From French patent specification 971,038 a method is known for the local heating of metallic work-pieces by inductive HF-heating with the use of an inductor comprising a core which is U-shaped at least in part and which may be manufactured from material having a high electric resistance at high frequencies, preferably ferrite, the core being arranged with respect to the workpiece in such manner that in practice a closed magnetic circuit is formed, the core and the work-piece performing a movement relatively to one another. in the said French patent specification the work-piece is turned with respect to the core about a shaft, so that a circular part of the work-piece is heated between the limbs of the U-shaped core.
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.
According to the invention, for this purpose 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.
According to a further feature of the invention, 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.
In order that the invention may be readily carried into effect, it will now be described with reference to the accompanying drawing, given by Way of example.
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. Consequently, it is preferable that 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. In this case 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.
What I claim is:
1. 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.
2. 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.
3. 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.
References Cited in the file of this patent UNITED STATES PATENTS OTHER REFERENCES Magnetic Ferrites, New Materials for Modern Application, Electrical Engineering, August 1954, pages 726 729.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2785263X | 1952-03-28 | ||
NL315656X | 1952-03-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2785263A true US2785263A (en) | 1957-03-12 |
Family
ID=27615803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
Country Status (2)
Country | Link |
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US (1) | US2785263A (en) |
BE (1) | BE518744A (en) |
Cited By (14)
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 |
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 |
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 |
FR2750436A1 (en) * | 1996-06-27 | 1998-01-02 | Renault | PROCESS AND DEVICE FOR SURFACE HARDENING OF A MECHANICAL PART |
DE202019102179U1 (en) | 2019-04-16 | 2019-05-28 | Te Connectivity Belgium Bvba | Soldering head and soldering device |
Citations (10)
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 (en) * | 1941-11-05 | 1952-12-01 | Deutsche Edelstahlwerke Ag | Device for electro-inductive heating of edges or protrusions of metal workpieces |
-
0
- BE BE518744D patent/BE518744A/xx unknown
-
1953
- 1953-01-29 US US334045A patent/US2785263A/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US458163A (en) * | 1891-08-25 | Alternating-electric-current heater | ||
DE857835C (en) * | 1941-11-05 | 1952-12-01 | Deutsche Edelstahlwerke Ag | Device for electro-inductive heating of edges or protrusions of metal workpieces |
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)
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 (en) * | 1984-03-06 | 1994-07-27 | メトカル・インコーポレーテッド | Heat treatment device with automatic temperature control heater |
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 |
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 |
FR2750436A1 (en) * | 1996-06-27 | 1998-01-02 | Renault | PROCESS AND DEVICE FOR SURFACE HARDENING OF A MECHANICAL PART |
EP0816518A1 (en) * | 1996-06-27 | 1998-01-07 | Renault | Method and apparatus for hardening the surface of a workpiece |
DE202019102179U1 (en) | 2019-04-16 | 2019-05-28 | Te Connectivity Belgium Bvba | Soldering head and soldering device |
Also Published As
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BE518744A (en) |
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