WO2012005076A1 - 高周波加熱用コイル - Google Patents
高周波加熱用コイル Download PDFInfo
- Publication number
- WO2012005076A1 WO2012005076A1 PCT/JP2011/063147 JP2011063147W WO2012005076A1 WO 2012005076 A1 WO2012005076 A1 WO 2012005076A1 JP 2011063147 W JP2011063147 W JP 2011063147W WO 2012005076 A1 WO2012005076 A1 WO 2012005076A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frequency heating
- high frequency
- heating coil
- workpiece
- pair
- Prior art date
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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
- H05B6/40—Establishing desired heat distribution, e.g. to heat particular parts of workpieces
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- 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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
-
- 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
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- 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
-
- 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
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
-
- 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 provides a loop portion that surrounds the main body portion for high-frequency heating a pipe-shaped workpiece in which a flange portion protruding radially outward from the outer peripheral surface of the main body portion having a closed cross section is formed along the axial direction;
- the present invention relates to a high-frequency heating coil including a pair of lead portions extending radially outward from both ends of the loop portion approaching in the axial direction and facing both side surfaces of the flange portion.
- the door impact bar which reinforces the door of an automobile and protects the passengers from the impact of a side collision, is bent into a predetermined shape while heating a low-strength straight steel pipe with a high-frequency heating coil, and then cooling water is injected.
- a material that is quenched and processed to a desired shape and strength by quenching is known from Patent Document 1 below.
- the workpiece heated by the high frequency heating coil is, for example, a pipe-shaped member obtained by roll-forming a metal plate material
- the radial direction from the outer peripheral surface of the main body portion of the workpiece to the portion where both side edges of the metal plate material are overlapped A flange portion projecting outward is formed along the axial direction.
- a pair of drawer portions connected to a high frequency power source are provided at both ends of the loop portion of the high frequency heating coil surrounding the main body portion of the workpiece, and the pair of drawer portions are arranged along both sides of the flange portion of the workpiece. By arranging, the flange part of the workpiece is heated.
- the present invention has been made in view of the above circumstances, and can uniformly heat a pipe-shaped workpiece in which a flange portion protruding radially outward from an outer peripheral surface of a main body portion having a closed cross section is formed along an axial direction.
- An object of the present invention is to provide a high-frequency heating coil.
- a pipe-shaped workpiece in which a flange portion that protrudes radially outward from the outer peripheral surface of a main body portion having a closed cross section is formed along the axial direction.
- a high-frequency heating coil comprising: a loop portion surrounding the main body portion; and a pair of lead portions extending radially outward from both ends approaching the axial direction of the loop portion and facing both side surfaces of the flange portion, A high-frequency heating coil having a first feature that a pair of lead portions are offset from each other in the axial direction is proposed.
- the pair of lead portions is curved in a U shape, a V shape, or a U shape. Proposed.
- a high frequency heating coil having a third feature that the pair of lead portions constitutes a loop when viewed in the direction perpendicular to the axis.
- the workpiece is a metal plate material curved in a pipe shape, and the flange portion is a pair of side edges of the metal plate material.
- a coil for high-frequency heating is proposed, which has a fourth feature of being configured by superimposing them.
- an eddy current induced by a high-frequency current flowing in the loop portion flows so as to circulate around the main body portion of the workpiece
- a fifth high-frequency heating coil is proposed in which an eddy current induced by a high-frequency current flowing through a pair of lead portions flows so as to circulate in a plane of the flange portion of the workpiece.
- 1st, 2nd drawer parts 14 and 15 of embodiment correspond to the drawer part of this invention.
- the main body of the work is surrounded by the loop portion of the high frequency heating coil and is heated at high frequency, and the flange of the work is sandwiched between the pair of lead portions of the coil and is heated at high frequency.
- a pair of drawer portions of the coil for high-frequency heating are opposed to the flange portion of the workpiece.
- the pair of drawer portions are arranged offset in the axial direction of the workpiece, the workpiece flange is caused by the high-frequency current flowing through the pair of drawer portions. It is possible to prevent eddy currents in the opposite directions from being generated in the parts, and to prevent the flange part of the work from becoming difficult to be heated compared to the main body part.
- the pair of lead portions of the high-frequency heating coil are curved in a U shape, a V shape, or a U shape, so that the pair of lead portions can be effectively formed by simple processing. Can be offset.
- the pair of lead portions form a loop when viewed in the direction perpendicular to the axis, so that an eddy current flowing in the plane of the flange portion is generated to enable effective heating.
- the workpiece is a metal plate material bent into a pipe shape, and the flange portion is formed by overlapping a pair of side edges of the metal plate material.
- the flange portion which is difficult to heat can be sufficiently heated by arranging the pair of drawer portions offset in the axial direction of the workpiece.
- the heating effect of the main body portion is enhanced, and the pair of drawer portions are provided. Since the eddy current induced by the flowing high-frequency current flows so as to circulate in the plane of the flange portion of the workpiece, the heating effect of the flange portion is enhanced.
- FIG. 1 is a perspective view of an induction hardening apparatus.
- FIG. 2 is a view in the direction of the arrow 2 in FIG.
- First embodiment 3 is a cross-sectional view taken along line 3-3 of FIG.
- First embodiment 4 corresponds to FIG.
- FIG. 5 is a perspective view of the high frequency heating coil.
- the workpiece W of the present embodiment is a member that integrally forms, for example, a roof side rail and a front pillar of an automobile, and is a closed cross section in which a steel plate is formed into a pipe shape by roll forming.
- Body portion 11 and a flange portion 12 formed by overlapping both side edges of the steel plate, and the flange portion 12 projects radially from the outer peripheral surface of the body portion 11 in the direction of the axis L of the workpiece W (see FIG. 2 and FIG. 3).
- the roll-formed workpiece W is a linear member having a constant cross section in the axial direction.
- the workpiece W is heated by the high-frequency heating coil I and bent to a predetermined shape by applying external force, and then rapidly cooled with cooling water. Then, quenching is performed.
- the high-frequency heating coil I includes a one-turn loop portion 13 that surrounds the outer periphery of the main body portion 11 of the workpiece W with a predetermined gap, and both sides of the flange portion 12 of the workpiece W extending radially outward from both ends of the loop portion 13.
- First and second lead portions 14 and 15 that face the surface through a predetermined gap are provided.
- the loop portion 13 has a two-dimensional shape that is curved in the same plane, and the loop is partially interrupted between both ends thereof.
- the first lead portion 14 is formed in a U shape and protrudes upward in the axial direction
- the second lead portion 15 is formed in a U shape.
- first and second drawer portions 14 and 15 are offset from each other in the axial direction.
- first and second lead portions 14 and 15 are viewed in the direction perpendicular to the axis of the workpiece W (see FIG. 3), they cooperate to form an oval shape or a track shape for athletics.
- the cooling device C disposed adjacent to the high frequency heating coil I includes an annular cooling water tank 16, four cooling water supply pipes 17 connected to the outer peripheral surface of the cooling water tank 16, and a cooling water tank. 16 are provided with a large number of cooling water ejection holes 18 formed on the inner peripheral surface.
- the workpiece W is inserted into the high frequency heating coil I and the cooling device C and heated by the high frequency heating coil I while moving in the axial direction at a predetermined speed.
- the main body portion 11 of the work W is fitted inside the loop portion 13 of the high frequency heating coil I, and the flange portion 12 of the work W is the first and second lead portions 14 and 15 of the high frequency heating coil I. It is sandwiched between.
- a high frequency current is supplied from the high frequency power source 19 (see FIG. 2) to the high frequency heating coil I, an eddy current is generated inside the workpiece W by a magnetic field formed around the high frequency heating coil I, and the workpiece W is heated in Joule heat. Is heated by.
- an eddy current a ′ in the reverse direction is generated in the main body 11 of the work W due to the current a flowing through the loop portion 13 of the high frequency heating coil I surrounding the outer periphery thereof. Since a ′ flows so as to go around the main body 11 having a closed cross section of the work W, the main body 11 of the work W can be efficiently heated.
- the workpiece W is heated by the high frequency heating coil I while being moved in the axial direction at a predetermined speed, and simultaneously bent to a predetermined shape by applying a bending moment, and then the cooling water ejection hole 18 of the cooling device C.
- the workpiece W can be continuously bent and quenched.
- the conventional high-frequency heating coil I shown in FIG. 5 is arranged in a straight line and in parallel so that the first and second lead portions 14 and 15 sandwich the flange portion 12 of the workpiece W.
- the eddy current b ′ generated by the current b flowing through the first drawing portion 14 and the eddy current c ′ generated by the current c flowing through the second drawing portion 15 are mutually equal in the inside of the flange portion 12 of the workpiece W.
- the two eddy currents b 'and c' cancel each other.
- the temperature of the flange portion 12 is not sufficiently increased as compared with the main body portion 11 of the workpiece W, and the quality of bending or quenching processing of the workpiece W may be deteriorated.
- the first and second lead portions 14 and 15 of the high frequency heating coil I are offset in the vertical direction so as not to face each other across the flange portion 12 of the workpiece W. Therefore, as shown in FIG. 3, the eddy current d ′ generated by the current d flowing through the first lead portion 14 and the eddy current e ′ generated by the current e flowing through the second lead portion 15 are not canceled out. Thus, the flange portion 12 can be efficiently heated.
- the first and second drawer portions 14 and 15 cooperate to form a closed loop and flow therethrough. Since the closed eddy currents d ′ and e ′ in the reverse direction flow in the plane of the flange portion 12 by the currents d and e, the surface of the flange portion 12 can be effectively heated. Moreover, since the first and second lead portions 14 and 15 are curved in a U shape, the first and second lead portions 14 and 15 are effectively offset by simple processing, and the first and second lead portions 14 are also offset. 15 can cooperate to form a closed loop.
- the workpiece W is a metal plate material bent into a pipe shape, and the flange portion 12 is configured by overlapping a pair of side edges of the metal plate material. Therefore, the thickness of the flange portion 12 is equal to the thickness of the main body portion 11. It becomes twice and it becomes difficult to heat. However, since the heating effect of the flange portion 12 of the workpiece W by the first and second drawer portions 14 and 15 can be enhanced as described above, the main body portion 11 and the flange portion 12 of the workpiece W can be uniformly heated. Can do.
- the first and second lead portions 14 and 15 extend in a U-shape in a direction away from the same position in the axial direction of the workpiece W.
- the coil I for high-frequency heating according to the second embodiment extends in a U shape in a direction in which the first and second lead portions 14 and 15 approach each other from two positions slightly separated in the axial direction of the workpiece W.
- drawing-out parts 14 and 15 are arrange
- the eddy currents generated in the flange portion 12 of the workpiece W due to the currents flowing through the first and second lead-out portions 14 and 15 are prevented from canceling each other out.
- the flange part 12 can be heated similarly to the form.
- the number of turns of the high frequency heating coil I is one turn, but may be a plurality of turns.
- the high-frequency heating coil I has a plurality of turns in the shape of a coil and the positions of the first and second lead portions 14 and 15 are greatly displaced in the axial direction, the problem of the present invention does not occur in the first place. It is a premise of the present invention that the positions of the first and second lead portions 14 and 15 are close to each other in the axial direction.
- first and second drawer portions 14 and 15 of the first embodiment are curved in a U shape
- first and second drawer portions 14 and 15 of the second embodiment are U-shaped. Although it is curved, the same effect can be achieved even when it is curved in a V shape.
- the high-frequency heating coil I of the present invention is not limited to quenching treatment, and can be applied to heating for any purpose.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
11 本体部
12 フランジ部
13 ループ部
14 第1引出部(引出部)
15 第2引出部(引出部)
Claims (5)
- 閉断面を有する本体部(11)の外周面から径方向外側に突出するフランジ部(12)が軸方向に沿って形成されたパイプ状のワーク(W)を高周波加熱すべく、前記本体部(11)を囲むループ部(13)と、前記ループ部(13)の軸方向に接近する両端から径方向外側に延びて前記フランジ部(12)の両側面に対向する一対の引出部(14,15)とを備える高周波加熱用コイルにおいて、
前記一対の引出部(14,15)を相互に軸方向両側にオフセットしたことを特徴とする高周波加熱用コイル。 - 前記一対の引出部(14,15)は、U字状、V字状あるいはコ字状に湾曲することを特徴とする、請求項1に記載の高周波加熱用コイル。
- 前記一対の引出部(14,15)は軸直角方向に見てループを構成することを特徴とする、請求項2に記載の高周波加熱用コイル。
- 前記ワーク(W)は金属板材をパイプ状に湾曲したものであり、前記フランジ部(12)は前記金属板材の一対の側縁を重ね合わせて構成されることを特徴とする、請求項1~請求項3の何れか1項に記載の高周波加熱用コイル。
- 前記ループ部(13)を流れる高周波電流により誘導される渦電流は前記ワーク(W)の本体部(11)を周回するように流れ、前記一対の引出部(14,15)を流れる高周波電流により誘導される渦電流は前記ワーク(W)のフランジ部(12)の面内を周回するように流れることを特徴とする、請求項1~請求項4の何れか1項に記載の高周波加熱用コイル。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11803412.3A EP2592161B1 (en) | 2010-07-08 | 2011-06-08 | High frequency heating coil |
US13/808,416 US9485812B2 (en) | 2010-07-08 | 2011-06-08 | High frequency heating coil |
JP2012523804A JP5619162B2 (ja) | 2010-07-08 | 2011-06-08 | 高周波加熱用コイル |
CN201180030233.0A CN102959097B (zh) | 2010-07-08 | 2011-06-08 | 高频加热用线圈 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-155866 | 2010-07-08 | ||
JP2010155866 | 2010-07-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012005076A1 true WO2012005076A1 (ja) | 2012-01-12 |
Family
ID=45441062
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/063147 WO2012005076A1 (ja) | 2010-07-08 | 2011-06-08 | 高周波加熱用コイル |
Country Status (5)
Country | Link |
---|---|
US (1) | US9485812B2 (ja) |
EP (1) | EP2592161B1 (ja) |
JP (1) | JP5619162B2 (ja) |
CN (1) | CN102959097B (ja) |
WO (1) | WO2012005076A1 (ja) |
Cited By (3)
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WO2014045976A1 (ja) | 2012-09-21 | 2014-03-27 | 新日鐵住金株式会社 | 高周波誘導加熱装置、加工装置 |
JP6195043B1 (ja) * | 2016-03-24 | 2017-09-13 | 新日鐵住金株式会社 | 3次元熱間曲げ焼入れ装置及び鋼管の3次元熱間曲げ焼入れ方法 |
WO2017164016A1 (ja) * | 2016-03-24 | 2017-09-28 | 新日鐵住金株式会社 | 3次元熱間曲げ焼入れ装置及び鋼管の3次元熱間曲げ焼入れ方法 |
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JPWO2012005076A1 (ja) | 2013-09-02 |
US20130175260A1 (en) | 2013-07-11 |
EP2592161A4 (en) | 2014-02-26 |
EP2592161B1 (en) | 2016-02-03 |
US9485812B2 (en) | 2016-11-01 |
EP2592161A1 (en) | 2013-05-15 |
JP5619162B2 (ja) | 2014-11-05 |
CN102959097B (zh) | 2014-07-16 |
CN102959097A (zh) | 2013-03-06 |
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