EP0439678A2 - Inducteur - Google Patents
Inducteur Download PDFInfo
- Publication number
- EP0439678A2 EP0439678A2 EP90118170A EP90118170A EP0439678A2 EP 0439678 A2 EP0439678 A2 EP 0439678A2 EP 90118170 A EP90118170 A EP 90118170A EP 90118170 A EP90118170 A EP 90118170A EP 0439678 A2 EP0439678 A2 EP 0439678A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- conductor
- heating
- shielding
- shielding conductor
- workpiece
- 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.)
- Ceased
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
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
- H05B6/102—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces the metal pieces being rotated while induction heated
-
- 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 relates to an inductor for the electroinductive heating of metallic objects.
- the heating conductors which induce the current into the workpiece to be heated are adapted to the shape of the workpiece when they e.g. semicircular, or they are linear, in the longitudinal direction of the workpiece, e.g. a shaft, extending at a distance from its surface.
- the goal in each case is to inductively heat the and only the workpiece sections which are then to be quenched for hardening.
- This procedure is called partial hardening.
- the bearing and crank pins are hardened to increase the wear resistance, but not the cheeks, so that the cheeks remain crack-free and tough, in order to be able to better withstand the bending stresses.
- the invention is based on the object of creating an inductor which, like the known one, can be modified in its effective length, but which additionally has means for adjusting and narrowly limiting the effective ranges of the heating conductors.
- At least one shielding conductor is assigned to the heating conductor of the inductor, the shielding element being of variable design.
- the shielding conductor or conductors are preferably arranged so that they can be displaced on the heating conductor in order to change or adapt its effective length to the length of the workpiece section to be heated.
- the shielding conductor is positioned such that it lies between the heating conductor and the workpiece and thus shields the heating conductor over a preselectable length on which no electrical currents are to be induced in the adjacent workpiece.
- the shielding conductor is preferably plate-shaped, but can also have any other suitable shape.
- the shielding conductor can also be provided with parallel return lines, which are preferably led around the heating conductor.
- a sliding sleeve made of electrically non-conductive material, in particular plastic can be provided between the return lines comprising the heating conductor and the heating conductor, which sliding sleeve is adapted to the intermediate space and ensures a smooth sliding guidance of the shielding conductor relative to the heating conductor in order to be able to move them relative to one another .
- the shielding conductor is attached to the sliding sleeve for mutual displacement relative to the heating conductor.
- the shielding conductor can be combined with a cooling or quenching shower.
- the shielding conductor can be combined with a cooling or quenching shower. Then, after the current flowing through the heating conductor has been switched off, the shielding conductor, which is equipped as a quenching shower, can be displaced to the point to be quenched, which can take place relatively quickly because the shielding conductor is in the immediate vicinity of the heated and quenched workpiece section.
- the shielding conductor serving as a quenching shower can be shifted to the point to be quenched either relative to the heating conductor that remains stationary or the heating conductor together with the shielding conductor is displaced or moved to the point to be quenched.
- a copper waveguide with a rectangular cross section is provided as the heating conductor 1, which is equipped with a laminated core 5.
- the shielding conductor 2 is arranged between the latter and the workpiece 6 over part of its length.
- the shielding conductor 2 can have the form of a plate, on the opposite ends of which return lines 3a, 3b are arranged, which, according to FIG. 1a, surround the laminated core 5 around the heating conductor 1 and are parallel to one another.
- the space between the return lines 3a, 3b and the laminated core 5 is filled with a sliding sleeve 7.
- the sliding sleeve 7 facilitates the axial displacement of the shielding conductor 2 on the laminated core 5 surrounding the heating conductor 1 or vice versa.
- the design of the shielding conductor 2 according to FIG. 1b differs from that according to FIG. 1a in another position of the return lines 3a, 3b, which form the legs and the shielding conductor 2 the web of a U-profile.
- FIG. 2 and 3 show the arrangement of the heating conductor 1, again with shielding conductor 2 between it and the workpiece 6 and a further heating conductor 1 '.
- the two lie Heating conductors 1, 1 'diametrically opposite one another and enclose the workpiece, which rotates about its axis during the heating, between them, so that it is heated from opposite sides by the two heating conductors 1, 1'.
- the shielding conductor 2 which is arranged axially displaceably on the heating conductor 1, the zone of influence of the heating conductor 1 with respect to the workpiece 6 can be varied.
- the end of the workpiece 6 is shielded and is therefore outside the current and thus heat-affected zone 8 of the workpiece 6, which is indicated by dash-dotted lines.
- FIG. 4 shows a modified embodiment with two identical heating conductors 1, 1 ', both of which are provided with a shielding conductor 2.
- FIG 5 shows the heating conductor 1 with the shielding conductor 2 surrounding it, which is designed as a quench spray 4 on the side facing the workpiece 6.
- This quenching shower 4 can come into operation immediately after the workpiece 6 has been heated up after the current flowing through the heating conductor 1 has been switched off and can quench the heated zone of the workpiece 6 for hardening.
- the shielding conductor 2 with the quenching shower 4 is moved in the longitudinal direction of the heating conductor 1 parallel to the heated surface zone 8 of the workpiece 6 by pushing.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19904002581 DE4002581A1 (de) | 1990-01-30 | 1990-01-30 | Induktor |
DE4002581 | 1990-01-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0439678A2 true EP0439678A2 (fr) | 1991-08-07 |
EP0439678A3 EP0439678A3 (en) | 1992-12-23 |
Family
ID=6399009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900118170 Ceased EP0439678A3 (en) | 1990-01-30 | 1990-09-21 | Inductor |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0439678A3 (fr) |
DE (1) | DE4002581A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2652160B1 (fr) | 2010-12-15 | 2015-10-14 | Mahle International GmbH | Dispositif de chauffage |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB717620A (en) * | 1952-05-01 | 1954-10-27 | Electric Furnace Co | Improvements relating to induction heat treatment of workpieces having cylindrical surfaces |
DE1936086B2 (de) * | 1969-07-16 | 1971-03-11 | Kloeckner Humboldt Deutz Ag | Haertemaschine insbesondere induktionshaertemaschine fuer steuernockenwellen von brennkraftmaschinen |
EP0072901A1 (fr) * | 1981-08-21 | 1983-03-02 | Park-Ohio Industries, Inc. | Procédé et dispositif pour le chauffage uniforme de pièces allongées par induction |
US4604510A (en) * | 1985-05-20 | 1986-08-05 | Tocco, Inc. | Method and apparatus for heat treating camshafts |
DE3843457C1 (fr) * | 1988-12-23 | 1989-07-20 | Aeg-Elotherm Gmbh, 5630 Remscheid, De |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE973915C (de) * | 1939-09-17 | 1960-07-14 | Aeg | Einrichtung zum induktiven Erhitzen durch hochfrequenten Wechselstrom, insbesondere zum Oberflaechenhaerten durch anschliessendes Abschrecken |
DE1009736B (de) * | 1954-06-21 | 1957-06-06 | Westinghouse Electric Corp | Einrichtung zum induktiven Erwaermen von Vertiefungen, Aushoehlungen und aehnlichen Hohlkoerper-Innenflaechen, insbesondere zum Erhitzen von Ventilsitzen fuer die Haertung |
DE1193974B (de) * | 1960-08-16 | 1965-06-03 | Deutsche Edelstahlwerke Ag | Verfahren und Vorrichtung zur Anwendung des gebrochenen Haertens auf das induktive Haerten mit Vorschub |
DE1182373B (de) * | 1963-05-30 | 1964-11-26 | Siemens Ag | Querfeld-Induktionsofen |
DE1565358B2 (de) * | 1966-03-12 | 1972-05-10 | Aeg-Elotherm Gmbh, 5630 Remscheid | Induktor zum induktiven oberflaechenhaerten von nicht rotationssymmetrischen werkstuecken, wie der nocken von nockenwellen |
DE2932438C3 (de) * | 1979-08-10 | 1982-03-11 | Aeg-Elotherm Gmbh, 5630 Remscheid | Halbschaleninduktor zur induktiven Oberflächenerwärmung von wellenförmig ausgebildeten Werkstücken |
JPS6298588A (ja) * | 1985-10-25 | 1987-05-08 | 日本軽金属株式会社 | 横磁束型電磁誘導加熱装置 |
-
1990
- 1990-01-30 DE DE19904002581 patent/DE4002581A1/de active Granted
- 1990-09-21 EP EP19900118170 patent/EP0439678A3/de not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB717620A (en) * | 1952-05-01 | 1954-10-27 | Electric Furnace Co | Improvements relating to induction heat treatment of workpieces having cylindrical surfaces |
DE1936086B2 (de) * | 1969-07-16 | 1971-03-11 | Kloeckner Humboldt Deutz Ag | Haertemaschine insbesondere induktionshaertemaschine fuer steuernockenwellen von brennkraftmaschinen |
EP0072901A1 (fr) * | 1981-08-21 | 1983-03-02 | Park-Ohio Industries, Inc. | Procédé et dispositif pour le chauffage uniforme de pièces allongées par induction |
US4604510A (en) * | 1985-05-20 | 1986-08-05 | Tocco, Inc. | Method and apparatus for heat treating camshafts |
DE3843457C1 (fr) * | 1988-12-23 | 1989-07-20 | Aeg-Elotherm Gmbh, 5630 Remscheid, De |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2652160B1 (fr) | 2010-12-15 | 2015-10-14 | Mahle International GmbH | Dispositif de chauffage |
Also Published As
Publication number | Publication date |
---|---|
EP0439678A3 (en) | 1992-12-23 |
DE4002581A1 (de) | 1991-08-01 |
DE4002581C2 (fr) | 1993-03-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1034314B1 (fr) | Dispositif de durcissement electro-inductif de surfaces de portee et de rayons de transition de vilebrequins | |
DE69934751T2 (de) | Elektrische Betätigungsvorrichtung | |
DE2734916C3 (de) | Induktor zum Erwärmen von Laufbahnflächen an Wälzlagerringen | |
DE4001887C2 (fr) | ||
EP3769923B1 (fr) | Rail de guidage pour une tronçonneuse à chaîne et procédé de fabrication d'un rail de guidage | |
EP1624077B1 (fr) | Dispositif et procédé pour durcir des zones d'appui cylindriques d'un arbre | |
DE2836401C2 (de) | Streufeldtransformator oder Drossel, insbesondere als Vorschaltgerät für Gasentladungslampen | |
EP2135485B1 (fr) | Inducteur pour la trempe par induction de crémaillères métalliques en forme de barre | |
DE3843457C1 (fr) | ||
EP0072901A1 (fr) | Procédé et dispositif pour le chauffage uniforme de pièces allongées par induction | |
DE4021025C1 (fr) | ||
DE4002581C2 (fr) | ||
DE4230897C1 (de) | Induktor | |
EP2690926A1 (fr) | Inducteur | |
EP3484024A1 (fr) | Actionneur | |
DE4118479A1 (de) | Vorrichtung zum fuehren von maschinenteilen | |
DE1690547B2 (de) | Vorrichtung zum einstellen der wirksamen laenge eines induk tors zum erwaermen metallischer werkstuecke | |
EP0637897B1 (fr) | Dispositif pour le chauffage inductif par champ longitudinal de pièces métalliques planes | |
DE3623119C1 (en) | Process for the inductive hardening of cylindrical bearing points with transition radii relieved with respect to the adjoining shaft parts and apparatus for carrying out the process | |
DE2332197B2 (de) | Induktionserhitzungsvorrichtung | |
DE916967C (de) | Vorrichtung zum elektro-induktiven Erhitzen von metallischen Werkstuecken | |
DE19612931C2 (de) | Wicklungsanordnung eines Transformators oder einer Drossel | |
EP2298939A2 (fr) | Dispositif de chauffage inductif et utilisation d'un tel dispositif | |
DE2827045C3 (de) | Vorrichtung zum Druckumformen von Metallen mittels eines impulsförmigen Magnetfeldes | |
WO2021115508A1 (fr) | Dispositif de chauffage par induction à champ transversal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): ES FR GB IT |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): ES FR GB IT |
|
17P | Request for examination filed |
Effective date: 19930107 |
|
17Q | First examination report despatched |
Effective date: 19940427 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19941021 |