WO2011013774A1 - 誘導加熱焼入装置、誘導加熱焼入方法、誘導加熱コイル、熱処理装置及び熱処理方法 - Google Patents
誘導加熱焼入装置、誘導加熱焼入方法、誘導加熱コイル、熱処理装置及び熱処理方法 Download PDFInfo
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- WO2011013774A1 WO2011013774A1 PCT/JP2010/062847 JP2010062847W WO2011013774A1 WO 2011013774 A1 WO2011013774 A1 WO 2011013774A1 JP 2010062847 W JP2010062847 W JP 2010062847W WO 2011013774 A1 WO2011013774 A1 WO 2011013774A1
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- Prior art keywords
- heating
- induction heating
- circumferential direction
- heat treatment
- heating coil
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 615
- 230000006698 induction Effects 0.000 title claims abstract description 193
- 238000010791 quenching Methods 0.000 title claims abstract description 69
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- 229910000976 Electrical steel Inorganic materials 0.000 description 3
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Classifications
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- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- H05B6/44—Coil arrangements having more than one coil or coil segment
-
- 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
- C21D2221/00—Treating localised areas of an article
-
- 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 an induction heating and quenching apparatus, an induction heating and quenching method, an induction heating coil, a heat treatment apparatus, and a heat treatment method, and more particularly to a technique for improving heat treatment efficiency and performing uniform treatment.
- a one-shot heating type heat treatment apparatus that performs batch processing using an induction heating coil facing the entire area to be processed is known (for example, JP, 2005-120415, JP, 2002-174251, JP, 2004-44802).
- the induction heating coil is configured in a shape corresponding to the entire area to be processed. For example, when the processing target has a circumferential shape, the annular induction heating coil faces the processing target, and when the processing target is flat, the flat induction heating coil faces the processing target. Yes.
- an induction heating coil corresponding to the shape and size of the object to be processed and the part to be processed is used. Therefore, when the object to be processed and the part to be processed are large, a large induction is used. A heating coil is required and high power is required.
- a mobile heat treatment apparatus that sequentially performs a heat treatment and a cooling treatment while moving an induction heating coil facing only a part of the treatment portion relative to the treatment portion (for example, JP-A-2005-89803, JP-A-60-116724).
- the induction heating coil is configured in a shape corresponding to a part of the processing target.
- the above-described induction heating technique has the following problems. That is, in the induction heating and quenching apparatus of the above-described one-shot heating method, it is necessary to use an induction heating coil corresponding to the size and shape of the processing target. For example, when the shape of the processing target is complicated, induction is performed. The shape and condition setting of the heating coil become complicated, and realization is difficult or impossible. Moreover, when a to-be-processed part is large, a large sized induction heating coil is needed and there exists a problem of requiring high output electric power. Furthermore, when deformation occurs due to thermal expansion or the like during induction heating, it is difficult to properly maintain the dimension between the induction heating coil and the processing object. For this reason, since it is necessary to set the induction heating coil larger in advance, there arises a problem that the heating efficiency is deteriorated.
- the induction heating coil when configured in a shape corresponding to a part of the processing target, the processing area per unit time is small, the processing time is long, ineffective.
- the necessary hardness cannot be obtained at the boundary between the start portion and the end portion of the treatment. There is a problem that a soft zone occurs.
- the present invention does not require high power, can easily realize heat treatment in a desired heating region, technology that can perform uniform treatment, and heat treatment efficiency when induction heating is performed even for a large object.
- An object is to provide a technique capable of improving the above.
- An induction heating and quenching apparatus includes the processing object and the heating coil along the circumferential direction of the processing target part of the processing object by rotating at least one of the processing object and the heating coil.
- a plurality of heating coils each having a heating conductor portion that induction-heats a portion in the axial direction that intersects the circumferential direction of the processing target portion, and at least one of the plurality of heating coils. Is a zigzag in which a curved portion opened on one side in the axial direction and a curved portion opened on the other side in the axial direction are alternately arranged along the circumferential direction in opposite directions.
- the heating conductor portion having a shape is included.
- the induction heating and quenching method includes a plurality of heating coils each having a heating conductor portion that induction-heats different portions in the axial direction that intersect the circumferential direction of the processing target portion of the processing target.
- the processing section and the heating coil are relatively disposed along the circumferential direction of the processing section while facing at least a part of the processing section and subjecting the processing section to heat treatment by the plurality of heating coils.
- Each of the regions to be treated that are heated by the heating conductor portions of the plurality of heating coils forms one continuous heating region, and at least one of the plurality of heating coils.
- the curved portion that opens on one side in the axial direction and the curved portion that opens on the other side in the axial direction are alternately arranged along the circumferential direction in opposite directions. Zigzag shape It was to have to heat conductor unit.
- An induction heating coil includes a heating conductor that opposes at least a part of a processing target and heat-treats the processing target while rotating relative to the processing target.
- the heating conductor portion extends so as to intersect the circumferential direction of the rotation, and the length in the circumferential direction at a portion far from the center of the rotational movement is the length in the circumferential direction at a portion near the center. It is characterized by having a conductor portion that is longer than that.
- the induction heating coil is opposed to the processing target portion and the processing target portion is heated with respect to the induction heating coil while the processing target portion is heated by induction heating.
- a moving heating step of relatively moving along the circumferential direction.
- An induction heating coil according to an aspect of the present invention is formed of a conductor member, and a curved portion opened on one side in the first direction and a curved portion opened on the other side in the first direction are alternately opposed. And a heating conductor portion having a zigzag shape continuously arranged along a second direction intersecting the first direction.
- the induction heating coil, a high-frequency power source connected to the induction heating coil, and the portion to be processed are relative to the induction heating coil along the second direction.
- a moving means for moving to are provided.
- the induction heating coil may be opposed to a part of the processing target having an endless loop shape continuous along the second direction by induction heating.
- FIG. 1 is a cross-sectional view of the induction heating and quenching apparatus according to the first embodiment of the present invention taken along line F2-F2 in FIG. 2 and viewed in the direction of the arrow.
- FIG. 2 is a plan view showing the induction heating and quenching apparatus according to the embodiment.
- FIG. 3 is a plan view showing the first induction heating and quenching apparatus according to the embodiment.
- FIG. 4 is a front view showing the first heating coil according to the embodiment.
- FIG. 5 is a plan view showing a second induction heating and quenching apparatus according to the embodiment.
- FIG. 6 is a front view showing a second heating coil according to the embodiment.
- FIG. 7 is an explanatory diagram showing a cross-sectional structure of the heating coil according to the embodiment.
- FIG. 8 is an explanatory diagram of the first and second heating regions according to the embodiment.
- FIG. 9 is an explanatory diagram of a third heating region according to the embodiment.
- FIG. 10 is an explanatory diagram showing the configuration of the heating conductor portion of the induction heating and quenching apparatus according to the second embodiment of the present invention.
- FIG. 11 is an explanatory diagram showing a configuration of a heating conductor portion of the induction heating and quenching apparatus.
- FIG. 12 is an explanatory view showing an induction heating and quenching apparatus according to the third embodiment of the present invention.
- FIG. 13 is an explanatory view showing a main part of an induction heating and quenching apparatus according to the fourth embodiment of the present invention.
- FIG. 14 is an explanatory view showing an induction heating and quenching apparatus according to the fifth embodiment of the present invention.
- FIG. 15 is an explanatory diagram of a heating coil incorporated in the induction heating and quenching apparatus according to the sixth embodiment of the present invention.
- FIG. 16 is a front view of a heating coil incorporated in an induction heating and quenching apparatus according to the seventh embodiment of the present invention.
- FIG. 17 is an explanatory view showing an induction heating and quenching apparatus according to the eighth embodiment of the present invention.
- FIG. 18 is an explanatory view showing an induction heating and quenching apparatus according to the ninth embodiment of the present invention.
- FIG. 19 is an explanatory view showing an induction heating and quenching apparatus according to the tenth embodiment of the present invention.
- FIG. 20 is an explanatory view showing an induction heating and quenching apparatus according to the eleventh embodiment of the present invention.
- FIG. 21 is an explanatory view showing an induction heating and quenching apparatus according to the twelfth embodiment of the present invention.
- FIG. 22 is an explanatory view showing an induction heating and quenching apparatus according to the thirteenth embodiment of the present invention.
- FIG. 23 is a plan view showing the induction heating apparatus according to the embodiment.
- FIG. 24 is a perspective view showing a heating coil according to the embodiment.
- FIG. 25 is an explanatory diagram of a conductor portion of the heating coil according to the embodiment.
- FIG. 26 is an explanatory diagram showing a cross-sectional structure of the heating coil according to the embodiment.
- FIG. 27 is a perspective view showing a heating coil of the induction heating apparatus according to the fourteenth embodiment of the present invention.
- FIG. 28 is a plan view showing the heating coil.
- FIG. 29 is a side view showing the heating coil.
- FIG. 30 is an explanatory diagram showing a configuration of a conductor portion of the heating coil.
- FIG. 31 is an explanatory view showing an induction heating and quenching apparatus according to the fifteenth embodiment of the present invention.
- FIG. 32 is an explanatory view showing the structure of the conductor portion according to the sixteenth embodiment of the present invention.
- FIG. 33 is an explanatory view showing the structure of the conductor portion according to the seventeenth embodiment of the present invention.
- FIG. 34 is an explanatory view showing a heat treatment apparatus according to the eighteenth embodiment of the present invention.
- FIG. 35 is a plan view showing the heat treatment apparatus according to the embodiment.
- FIG. 36 is a side view showing the heat treatment apparatus according to the embodiment.
- FIG. 37 is a front view showing the heat treatment apparatus according to the embodiment.
- FIG. 38 is an explanatory diagram showing a cross-sectional structure of the heating coil according to the embodiment.
- FIG. 39 is an explanatory diagram of a heat treatment apparatus according to the nineteenth embodiment of the present invention.
- FIG. 40 is an explanatory diagram of a heat treatment apparatus according to the twentieth embodiment of the present invention.
- FIG. 41 is an explanatory diagram of a heat treatment apparatus according to the twenty-first embodiment of the present invention.
- FIG. 42 is an explanatory diagram of a heat treatment apparatus according to the twenty-second embodiment of the present invention.
- FIG. 43 is an explanatory diagram of a heat treatment apparatus according to the twenty-third embodiment of the present invention.
- arrows X, Y, and Z indicate three directions orthogonal to each other.
- the configuration is appropriately enlarged, reduced, or omitted for explanation.
- FIG. 1 is a cross-sectional view showing a configuration of an induction heating and quenching apparatus 1 according to the present embodiment
- FIG. 2 is a plan view.
- the induction heating and quenching apparatus 1 is arranged in plural on the outer periphery of the work Q1 and the movement support part (moving means) that movably supports the work Q1 that is the object to be processed.
- Each of the heating devices 10A and 10B and a cooling unit 13 (cooling means) that cools the workpiece Q1 after the heat treatment step of the workpiece Q1 are configured.
- the cooling unit 13 provided below is formed in a cylindrical shape so as to surround the outside of the work Q1 moved downward after the heat treatment, and cools the work Q1 disposed in the inner space 13a.
- a cylindrical workpiece Q1 having a step is used, and the stepped outer peripheral surface of the workpiece is defined as a processing target A.
- the workpiece Q1 as an example of the processing object is a stepped cylindrical member with the axis C1 as the center, a concave portion Q1a that is recessed inward at the center in the axial direction, and a convex portion that protrudes outward at both ends in the axial direction.
- Q1b is formed.
- a plurality of first heating devices 10A and a plurality of second heating devices 10B arranged along a predetermined path around the workpiece Q1 are formed in an endless loop shape.
- a processing target A that is continuous in a certain circular shape is heated over the entire circumferential direction, which is the continuous direction of the loop.
- an outer peripheral surface area of the concave portion Q1a at the center in the axial direction is defined as a first area A1
- an outer peripheral surface area of the pair of convex portions Q1b at both ends in the axial direction is defined as a second area A2.
- the first region A1 and the second region A2 are separated from each other in the axial direction of the processing object and are also separated from each other in the radial direction.
- the plurality of first heating devices 10 ⁇ / b> A are respectively arranged at four locations separated from each other at a central angle of 90 degrees in the path along the circumferential direction.
- 2nd heating apparatus 10B is arrange
- the first heating device 10 ⁇ / b> A and the second heating device 10 ⁇ / b> B are alternately arranged so as to be separated from each other in the circumferential direction and the axial direction.
- the first heating conductor portion 31A of the first heating device 10A is arranged facing the first region A1 while ensuring a predetermined gap dimension G1.
- 10 A of 1st heating apparatuses concentrate on the 1st area
- the heating conductor portion 31B of the second heating device 10B is arranged facing the second region A2 while ensuring a predetermined gap dimension G2.
- the second heating device 10B performs induction heating mainly on the second region A2.
- the circumferential direction R along the outer peripheral surface of the workpiece Q1 with the axis C1 as the center is defined as the first direction
- the Z direction that is the axial direction of the workpiece Q1 is defined as the second direction. Since the work Q1 has a stepped shape, the first heating conductor portion and the second heating conductor portion have different radial dimensions in the circumferential direction R. However, by rotating the work Q1 about the axis C1, both It moves along the circumferential direction.
- a path including the circumferential directions R1 and R2 is defined as a movement path, and a rotation direction centered on C1 including R1 and R2 is defined as a first direction R.
- the radius in the circumferential direction R1 is a value obtained by adding the gap dimension G1 to the radius dimension r2 of the outer diameter of the recess Q1a, and is r2 + G1.
- the radius in the circumferential direction R2 is a value obtained by adding the gap dimension G2 to the radius dimension r1 of the outer diameter dimension of the convex portion Q1b, and becomes r1 + G2.
- the plurality of first heating devices 10 ⁇ / b> A and second heating devices 10 ⁇ / b> B include a high-frequency power source 21 as power supply means, lead wires 22 and 23 connected to the high-frequency power source 21, and A spacer 28 having a pair of conductive plates 24 and 25 connected to the lead wires 22 and 23, an induction heating coil 26 having both ends connected to the pair of conductive plates 24 and 25, and a heating conductor portion of the induction heating coil 26 31A and 31B and a core 27 disposed on the back side.
- the induction heating coil 26 of the heating device 10A includes a zigzag heating conductor portion 31A facing the first region A1 of the workpiece Q1, a first connection conductor portion 32 continuous to one end side 31a of the heating conductor portion 31A, and heating.
- a second connecting conductor portion 33 continuous to the other end side 31b of the conductor portion 31A is provided continuously and integrally.
- the heating conductor portion 31A of the first heating device 10A has a plurality of U-shaped bent portions 34, 35 that open toward the center in the Z direction, A plurality of zigzag shapes arranged continuously along the direction R are formed.
- the bent portion 34 has a U-shape opened downward, and the bent portion 35 has a U-shape opened upward.
- the interval R5 between adjacent coils is set to be not less than 1 and not more than 2 times the dimension of R4, which is the coil width.
- the sum of the dimensions L1 in the first direction of the four heating conductor portions 31A is set to about 1/3 of the entire circumference in the first direction of the first region A1. That is, the cover ratio, which is the ratio of the dimension in the first direction of one heating conductor portion 31A to the first region A1, is set to 1/12, and the center angle ⁇ 1 is set to 30 degrees.
- the induction heating coil 26 of the second heating device 10B is provided on the hairpin-shaped heating conductor portion 31B facing the second region A2 of the workpiece Q1 and one end side 31a of the heating conductor portion 31B.
- the continuous 1st connection conductor part 32 and the 2nd connection conductor part 33 continued to the other end side 31b of the heating conductor part 31B are provided continuously and integrally.
- the heating conductor portion 31B is configured to be bent in a rectangular frame shape from one end side 31a on the left side in FIG. 6 in a front view, and the other end side 31b returns to the lower side in the drawing on the one end side 31a.
- 31b is continuous to the connecting conductor portions 32, 33. Note that the coverage of the second heating device 10B is not necessarily the same as that of the first heating device 10A, but varies depending on the shape of the workpiece.
- the first connection conductor portion 32 and the second connection conductor portion 33 are arranged with the spacer 28 interposed therebetween.
- the spacer 28 includes a pair of conductive plates 24 and 25 each having a rectangular flat plate shape, and a rectangular flat plate-like insulating plate 38 sandwiched between the pair of conductive plates 24 and 25.
- the conductive plates 24 and 25 and the insulating plate 38 are fixed by bolts 41 and nuts 42 through an insulating bush 39.
- Each of the conductive plates 24 and 25 is connected to the high frequency power source 21 via the lead wires 22 and 23.
- Couplers 36 and 36 (only one is shown) for connecting components such as a coolant hose are provided at the ends of the first connection conductor 32 and the second connection conductor 33, respectively.
- the induction heating coil 26 is formed in a rectangular hollow shape from a material such as copper.
- the hollow portion 26a becomes a passage through which the coolant flows.
- the core 27 is made of a material having a high magnetic permeability such as a silicon steel plate, a polyiron core, or ferroton, and is disposed on the back side of the heating conductor portions 31A and 31B.
- the core 27 is formed in a U-shaped cross section integrally including both side portions of the heating conductor portions 31A and 31B and a rear wall portion.
- the movement support part 11 maintains the gap dimension G1 between the heating conductor part 31A and the first area A1 at a predetermined value and also sets the gap dimension G2 between the heating conductor part 31B and the second area A2. Control is performed to maintain a predetermined value.
- the first heating conductor portion 31A and the second heating conductor portion 31B have different shapes and are separated from each other in the axial direction, and the sizes, shapes, and positions of the regions A1, A2 are also different. They are different from each other. Therefore, as shown in FIG. 8, the first heating region P1 formed around the center in the Z direction of the recess Q1a and the second center formed around the center in the Z direction of the pair of upper and lower projections Q1b.
- the heating area P2 is a heating area that is different in the axial direction.
- the induction heating and quenching method according to the present embodiment will be described.
- the heated part A and the heated conductor parts 31A and 31B are relatively moved while heating the treated part A, and the treated part A is cooled after the moving heating process. And a cooling process.
- the first region A1 which is a part of the processing target A is opposed to the first heating conductor portion 31A, and the second heating region P1 is different from the first heating region P1 by the first heating conductor portion 31A.
- the second heating conductor portion 31B having the heating region P2 is opposed to the second region A2 that is at least a part of the processing target A, and the first heating conductor portion 31A and the second heating conductor portion 31B are opposed to the processing target A.
- the regions A1 and A2 are relatively moved along the predetermined first direction R with respect to the first heating conductor portion 31A and the second heating conductor portion 31B while being heated at.
- the high frequency power supply 21 when the high frequency power supply 21 is turned on with the heating conductor portions 31A and 31B facing the first regions A1 and A2, respectively, the high frequency current is supplied to the lead wire 22, the first conductive plate 24, The first connection conductor 32, the heating conductor 31, the second connection conductor 33, the second conductive plate 25, and the lead wire 23 are sequentially passed back to the high-frequency power source 21.
- a high-frequency current flows from the one end 31a side to the other end 31b side in the heating conductor portions 31A and 31B, an induced current is generated on the surface of the heating conductor portions 31A and 31B, and the regions A1 and A2 disposed to face each other Each is heavily heated.
- heating is simultaneously performed at a plurality of locations separated by a certain distance in the axial direction and the radial direction. That is, heat treatment is performed on the surface of the workpiece Q1 that is opposed to each other at each location separated from each other.
- the workpiece Q1 is rotated about the axis C1 while the gap dimensions G1 and G2 are maintained at the predetermined values by the moving support portion 11, so that the heating conductor portions 31A and 31B are covered.
- the processing unit A is relatively moved along the first direction R at a predetermined speed.
- the first heat treatment by the first heating conductor portion and the second heating by the second heating conductor portion are sequentially performed in each part of the processing target A.
- first and second heating are performed on the entire periphery of the processing target A, respectively.
- Each heating region P1, P2 of the processing target A heated by the plurality of heating conductor portions 31A, 31B forms one continuous heating region P3.
- the first and second heating regions P1 and P2 are combined, and heat treatment is performed in the desired third heating region P3.
- the moving support unit 11 moves the workpiece Q1 to the lower cooling unit 13 along the axial direction.
- the cooling part 13 cools the workpiece
- the following effects can be obtained.
- the first heating conductor portion 31A that heats the first region A1 that is a wide region in the axial direction has a zigzag shape having a plurality of curved portions continuously, thereby ensuring a strong magnetic field and good A temperature pattern is obtained. For this reason, high-speed and uniform heat treatment can be performed with less power.
- the induction heating coil 26 having the zigzag-shaped heating conductor portion 31 it is possible to realize heat treatment of a large workpiece by moving partial heating that cannot be realized by the hairpin-shaped induction heating coil corresponding to the first region A1, for example. It becomes.
- the coil efficiency is 30 to 40% in plane (end face) heating with a hairpin-shaped induction heating coil, but the coil efficiency exceeds 70% in the zigzag induction heating coil.
- each of the heating devices 10A and 10B can be reduced in size. For this reason, it is possible to reduce the required power and the manufacturing cost.
- FIG. 10 is a plan view showing the arrangement of the induction heating and quenching apparatus 2 according to the present embodiment
- FIG. 11 is an explanatory diagram showing the shape of the heating conductor portion 31 of the induction heating and quenching apparatus 2.
- the workpiece Q ⁇ b> 2 has a cylindrical shape whose upper and lower end surfaces are planar, and this end surface is used as the processing target A.
- the heating conductor portion 31 of the first heating device 10 ⁇ / b> A is continuously arranged along the circumferential direction R in a direction in which a plurality of bent portions 134 and 135 alternately face each other, and the bent portions 134 that face each other. , 135 each have a zigzag shape in which the bent conductor portions 136 are arranged.
- the plurality of bent portions 134 have a bent shape that opens outwardly, which is one side in the direction intersecting the moving direction, and the bent portion 135 has a bent shape that opens radially inward, which is the other side.
- the plurality of conductor portions 136 extend so as to intersect the circumferential direction R, and the length in the circumferential direction at a portion far from the axis C1 that is the center of rotation is near the axis C1.
- the length in the circumferential direction is longer than the length in the circumferential direction, and the length in the circumferential direction corresponds to the speed in the circumferential direction.
- the conductor portion 136 maintains a constant cross-sectional area and a cross-sectional shape orthogonal to the extending direction, and the extending angle at the part far from the axis C1 is larger than the extending angle at the part close to the axis C1.
- the dimensions are set based on two points, the innermost point P1 and the outermost point P3 of the workpiece.
- the rotation radius (distance from the axis C1) of a certain reference point P1 on the processing target A1 facing the first portion 136a is r4, and the rotation of a certain reference point P3 on the processing target A1 facing the third portion 136c.
- the conductor portion 136 is L1: L3 ⁇ r4: r5 is set, and the distance from the axis C1, which is the center of rotation, corresponds to the circumferential dimension.
- the circumferential dimension (distance) is inversely proportional to the circumferential speed proportional to the rotation diameter, and the time for passing, that is, the heating time is kept constant.
- the dimension L2 of the intermediate second portion 136b is set to L1 ⁇ L2 ⁇ L3 so as to be a dimension between L1 and L3.
- the induction heating and quenching apparatus 2 of the present embodiment has a slow speed on the outer peripheral side where the speed at which the work Q2 passes through the heating conductor portion 31 becomes fast when the work Q2 rotates around the axis C1. Since the dimension in the moving direction of the heating conductor portion 31 is set to be larger than the inner side, the time required for passage can be made uniform, and the heat treatment time is made uniform.
- the plan view of the induction heating and quenching apparatus 2 is the same as FIG. 10, and the plan view of the heating conductor 31 is the same as FIG.
- the work Q3 has a drum shape in which the upper and lower outer peripheral surfaces are inclined, and this outer peripheral surface is used as the processing portion A.
- the upper outer peripheral surface on which the workpiece Q3 is inclined is defined as a first region A1
- the lower outer peripheral surface on which the workpiece Q3 is inclined is defined as a second region A2.
- the induction heating and quenching apparatus 3 includes a first heating apparatus 10A for induction heating the first area A1 on the upper surface and a second heating apparatus 10A for induction heating the second area A2 on the lower surface. .
- the heating conductor portion 31A of this embodiment is inclined with respect to the axial direction and the circumferential direction, and is configured along the upper and lower outer circumferential surfaces of the workpiece Q3.
- the heating conductor portion 31A of the first heating device 10A is continuously arranged along the circumferential direction R in a direction in which the plurality of bent portions 134 and 135 alternately face each other, A zigzag shape is formed in which the bent conductor portions 136 are arranged between the opposing bent portions 134 and 135.
- the plurality of bent portions 134 have a bent shape that opens outwardly, which is one side in the direction intersecting the moving direction, and the bent portion 135 has a bent shape that opens radially inward, which is the other side.
- the plurality of conductor portions 136 extend so as to intersect the circumferential direction R, and the length in the circumferential direction at a portion far from the axis C1 that is the center of rotation is longer than the length in the circumferential direction at a portion near the axis C1. It is configured to be long, and the length in the circumferential direction corresponds to the speed in the circumferential direction.
- the conductor portion 136 maintains a constant cross-sectional area and a cross-sectional shape orthogonal to the extending direction, and the extending angle at the part far from the axis C1 is larger than the extending angle at the part close to the axis C1. By being bent so that the angle with respect to the direction R becomes smaller, the circumferential speed and length correspond to each other.
- FIG. 13 is an explanatory view showing the arrangement of the induction heating and quenching apparatus according to this embodiment.
- the work Q4 has a hollow body shape and has an inner peripheral surface inclined with respect to the axial direction and the circumferential direction.
- the heating conductor portion 31A of this embodiment is inclined with respect to the axial direction and the circumferential direction, and is configured along the upper and lower inner circumferential surfaces of the workpiece Q4.
- the heating conductor portion 31A of the first heating device 10A is continuously arranged along the circumferential direction R in a direction in which the plurality of bent portions 134 and 135 alternately face each other, A zigzag shape is formed in which the bent conductor portions 136 are arranged between the opposing bent portions 134 and 135.
- the plurality of bent portions 134 have a bent shape that opens outwardly, which is one side in the direction intersecting the moving direction, and the bent portion 135 has a bent shape that opens radially inward, which is the other side.
- the plurality of conductor portions 136 extend so as to intersect the circumferential direction R, and the length in the circumferential direction at a portion far from the axis C1 that is the center of rotation is longer than the length in the circumferential direction at a portion near the axis C1. It is configured to be long, and the length in the circumferential direction corresponds to the speed in the circumferential direction.
- the conductor portion 136 maintains a constant cross-sectional area and a cross-sectional shape orthogonal to the extending direction, and the extending angle at the part far from the axis C1 is larger than the extending angle at the part close to the axis C1. By being bent so that the angle with respect to the direction R becomes smaller, the circumferential speed and length correspond to each other.
- FIG. 14 is a side view showing the arrangement of the induction heating and quenching apparatus 4 according to this embodiment.
- the peripheral surface of the stepped cross-sectional trapezoidal work Q ⁇ b> 5 is used as the processing target A.
- the outer peripheral surface of the central portion in the axial direction is defined as a first region A1
- the outer peripheral surface of a step portion protruding outward at both ends in the axial direction is defined as a second region A2.
- the induction heating and quenching apparatus 4 includes a first heating apparatus 10A that induction-heats the first processed part A1 in the central portion in the axial direction and a second heating that induction-heats the second processed parts A2 at the two axial ends.
- a device 10B is provided.
- the areas A1 and A2 are surfaces inclined with respect to the axis, and the distance from the center of rotation changes.
- the heating conductor portions 31A and 31B of the present embodiment are both inclined with respect to the axial direction and the circumferential direction, and are configured along the upper and lower outer circumferential surfaces of the workpiece Q5. As the shape of the heating conductor portion 31A, for example, the heating conductor portion 31A similar to that of the third embodiment is used.
- the zigzag shape is inclined in the axial direction and has the bent portions 134 and 135 facing each other, and the conductor portion 136 has a constant cross-sectional area and a cross-sectional shape perpendicular to the extending direction while maintaining a constant shape.
- the extending angle at the part far from C1 is bent so that the angle with respect to the circumferential direction R is smaller than the extending angle at the part close to the axis C1.
- bent portions 34 and 35 bent in a rectangular shape with a U-shaped cross section are illustrated as the bent portion, but the present invention is not limited to this.
- FIG. 15 may apply the first heating conductor portion 31 ⁇ / b> C having a structure having curved portions (curved portions) 34 and 35 that are curved in a semicircular shape as a sixth embodiment of the present invention.
- the same effects as those of the first to fifth embodiments can be obtained.
- a first heating conductor portion 31D having a structure having curved portions 34 and 35 bent in a trapezoidal shape may be applied.
- the same effects as those of the first to fifth embodiments can be obtained.
- the zigzag shape shown in the first embodiment may be used instead of the bent shape as described above.
- an example of relative movement by rotating the workpiece Q1 has been described.
- the present invention is not limited to this, and the relative movement may be performed by moving the heating conductor portions 31A and 31B.
- FIG. 17 schematically shows the positional relationship when two first heating devices 10A and two second heating devices 10B are arranged as an eighth embodiment of the present invention.
- the same effects as those of the first to fifth embodiments can be obtained.
- FIG. 18 schematically shows the positional relationship when three first heating devices 10A and three second heating devices 10B are arranged as a ninth embodiment of the present invention. In this embodiment, the same effects as those of the first to fifth embodiments can be obtained.
- FIG. 19 schematically shows a positional relationship when five first heating devices 10A and five second heating devices 10B are arranged as the tenth embodiment of the present invention. In this embodiment, the same effects as those of the first to fifth embodiments can be obtained.
- FIG. 20 schematically shows a positional relationship when six first heating devices 10A and six second heating devices 10B are arranged as an eleventh embodiment of the present invention. In this embodiment, the same effect as in the first to fifth embodiments can be obtained.
- the coil arrangement is alternately arranged or opposed, the arrangement is not limited to this, and can be arbitrarily arranged such as 1: 3.
- the workpiece Q1 having one step is illustrated, but the present invention is not limited to this, and the present invention can also be applied to a workpiece having two or more steps.
- FIG. 21 shows, as a twelfth embodiment of the present invention, when a workpiece Q5 having two steps is targeted, in the processing target A that is the outer peripheral surface of the workpiece, there are three types according to the position of the step.
- the first to third areas A1, A2, A3 are set.
- the workpiece Q5 is symmetrical in the vertical direction and has steps in the vertical direction
- the second area A2 and the third area A3 are respectively arranged at two locations in the axial direction.
- three induction heating and quenching apparatuses 10A, 10B, and 10C are used, and the heating conductor portions 31A, 31B, and 31C are arranged so as to face the regions A1, A2, and A3, respectively.
- the first heating region P4 heated by the heating conductor portion 31A, the second heating region P5 heated by the heating conductor portion 31B, and the third heating heated by the heating conductor portion 31C By synthesizing the heating region P6, one continuous desired heating region P7 can be easily processed.
- the workpiece is not limited to a hollow shape, and may be a solid one.
- FIG. 22 is an explanatory diagram schematically showing the overall configuration of the induction heating and quenching apparatus 201 according to the present embodiment.
- the induction heating and quenching apparatus 201 is an apparatus that performs induction hardening, and includes a movement support unit (work movement rotation support base) 211 that movably supports a work W1 that is a processing target, An induction heating device 10 (heat treatment device) that induction-heats the processing target N1 of W1 and a cooling unit 213 (cooling means) that cools the workpiece W1 after the heat treatment process of the processing target N1 are configured.
- the induction heating device 210 includes a matching panel connected to the high frequency power source 221.
- the movement support unit 211 rotates the workpiece W1 in the rotational direction (circumferential direction) about the axis C1 with the workpiece W1 set at a predetermined position. At this time, the movement support part 211 controls the gap dimension J1 between the heating conductor part 231 and the workpiece W1 to be maintained at a predetermined value. Furthermore, the movement support unit 211 moves the workpiece W1 to the cooling unit 213 after the heat treatment is completed over the entire circumference (the entire stroke) of the processing target N1. The cooling unit 213 cools the workpiece W1 after the heat treatment is finished.
- the induction heating apparatus 210 includes a high-frequency power source 221 as power supply means, lead wires 222 and 223 connected to the high-frequency power source 221, and a pair connected to the lead wires 222 and 223.
- Spacers 228 having conductive plates 224 and 225, induction heating coils 226 having both ends connected to a pair of conductive plates 224 and 225, and a core 227 disposed on the back side of the heating conductor portion 231 of the induction heating coil 226 ( 26).
- the workpiece W1 as an example of the processing object is a thick part having a thickness of 25 mm or more.
- the outer diameter d1 500 mm
- the inner diameter d2 250 mm around the axis C1
- a cylindrical member having an axial length h1 100 mm is used.
- an annular plane region perpendicular to the axis C1 that is one end surface in the axial direction of the workpiece W1 is set as the processing target N1.
- the to-be-processed part N1 has an endless loop shape that is continuous along the circumferential direction of the workpiece W1.
- the workpiece W1 is rotated around the axis C1 by the movement support portion 211 in a state where the heating conductor portion 231 is disposed so as to face a part of the portion to be processed N1, so that the portion N1 to be processed is the heating conductor portion.
- a case is shown in which the part N1 is relatively moved along the circumferential direction R (rotational direction) about the axis C1 with respect to 31 to heat-treat the treated part N1 over the entire circumference.
- the induction heating coil 226 includes a zigzag-shaped heating conductor portion 231 that faces a part of the processing target N1 of the workpiece W1, and a first end 231b that is continuous with the one end side 231b of the heating conductor portion 231.
- a second connecting conductor 233 that is continuous with the other end 231a of the heating conductor 231.
- the first connection conductor portion 232 extends continuously to the end portion 231b on one end side of the heating conductor portion 231, and a coupler 237 for connecting parts such as a hose for cooling liquid is provided at the end portion.
- the second connection conductor portion 233 extends continuously to the end portion 231a on the other end side of the heating conductor portion 231, and a coupler 237 for connecting components such as a hose for coolant is provided at the end portion. ing.
- the first connection conductor portion 232 and the second connection conductor portion 233 are disposed with the spacer 228 interposed therebetween.
- the spacer 228 includes a pair of conductive plates 224 and 225 each having a rectangular flat plate shape, and a rectangular flat plate-like insulating plate 238 sandwiched between the pair of conductive plates 224 and 225, and the spacer 228 is overlapped.
- the conductive plates 224 and 225 and the insulating plate 238 are configured to be fixed by bolts 241 and nuts 242 via an insulating bush 239.
- Each of the conductive plates 224 and 225 is connected to the high-frequency power source 221 through lead wires 222 and 223.
- the heating conductor portion 231 is continuously arranged along the circumferential direction R in a direction in which a plurality of bent portions 234 and 235 alternately face each other, and the bent portions 234 facing each other.
- a zigzag shape is formed in which conductor portions 236 that are respectively bent between 235 are arranged.
- the plurality of bent portions 234 have a bent shape that opens outwardly, which is one side in the direction intersecting the moving direction, and the bent portion 35 has a bent shape that opens radially inward, which is the other side.
- the dimension in the circumferential direction R of the heating conductor portion 231 in which the plurality of bent portions 234 and 235 and the plurality of conductor portions 236 connecting them are continuously formed is, for example, the heating conductor portion 231 with respect to the entire circumference of the processing target N1.
- the plurality of conductor portions 236 extend so as to intersect the circumferential direction R, and the circumferential length in a portion far from the axis C1, which is the center of rotation, is larger than the circumferential length in a portion near the axis C1. It is configured to be long, and the length in the circumferential direction corresponds to the speed in the circumferential direction.
- the conductor portion 236 maintains a constant cross-sectional area and a cross-sectional shape orthogonal to the extending direction, and the extending angle at the portion far from the axis C1 is larger than the extending angle at the portion close to the axis C1. By being bent so that the angle with respect to the direction R becomes smaller, the circumferential speed and length correspond to each other.
- This center line is along the extending direction of each part.
- the dimensions are set based on two points, the innermost point P1 and the outermost point P3 of the workpiece.
- the rotation radius (distance from the axis C1) r1 250 mm of a reference point P1 on the processing target N1 facing the first portion 236a, and a reference point P3 on the processing target N1 facing the third portion 236c.
- the circumferential dimension M1 of the first portion 236a facing P1 is 15 mm
- the circumferential dimension M3 of the third portion 236c facing P3 is 30 mm.
- the conductor portion 236 has M1: M3 ⁇ r1: r3, and the distance from the axis C1 that is the center of rotation corresponds to the circumferential dimension. For this reason, when P1 and P3 are taken as a reference, the circumferential dimension (distance) is inversely proportional to the circumferential speed proportional to the radius of rotation, and the time required for passing, that is, the heating time is kept constant.
- the dimension M2 of the intermediate second portion 236b is set to M1 ⁇ M2 ⁇ M3 so as to be a dimension between M1 and M3.
- the heating conductor portion 231 has a higher speed at the outer peripheral side where the processing portion N1 passes through the heating conductor portion 231 at a higher speed than the inner side at which the speed decreases. Since the dimension in the moving direction is set to be large, the heating time can be made equal.
- the induction heating coil 226 is formed from a material such as copper into a rectangular hollow shape, for example.
- the hollow portion 226a serves as a passage through which the coolant flows.
- the core 227 is made of a material having a high magnetic permeability such as a silicon steel plate, a polyiron core, or ferroton, and is disposed on the back side of the heating conductor portion 231.
- the core 227 is formed in a U-shaped cross section integrally including both side portions of the heating conductor portion 231 and a rear wall portion.
- the induction heating and quenching method according to the present embodiment includes a moving heating process in which the processing target N1 is relatively moved while heating, and a cooling process in which the processing target N1 is cooled after the moving heating process.
- the high-frequency current flows from the one end 231 b side to the other end 231 a side through the bent portion 234, the conductor portion 236, and the bent portion 235 as indicated by an arrow in the drawing, and the surface of the heating conductor portion 231.
- Inductive current is generated in the portion, and the processing target portion N1 disposed opposite to the portion is induction-heated.
- the workpiece N1 is rotated by rotating the workpiece W1 while the gap dimension J1 between the surface of the workpiece N1 of the workpiece W1 and the surface of the heating conductor 231 is maintained at a predetermined value by the moving support unit 211. Is moved relative to the heating conductor portion 231 in the circumferential direction at a predetermined speed.
- the entire area to be processed N1 which is an annular region on the end face of the workpiece W1 disposed to face the heating conductor portion 231, is uniformly heated.
- the time taken to pass through the opposite processing target N1 is as follows. It will be kept constant. For this reason, the degree of heating applied to the portion to be processed N1 becomes uniform.
- the moving support unit 211 moves the workpiece 212 to the lower cooling unit 213 along the axial direction.
- the cooling unit 213 cools the work 212 disposed in the space 213a, which is a cooling region surrounded by the cooling jacket, with a coolant (cooling process).
- the coolant flows through the hollow portion 226 a inside the induction heating coil 226 and through the hollow portion 226 a of the first connecting conductor portion 232, the heating conductor portion 231, and the second connecting conductor portion 233.
- the induction heating coil 226 and the conductive plates 224 and 225 are cooled.
- the induction heating coil, the induction heating device, and the induction heating method according to this embodiment the following effects can be obtained. That is, since the conductor portion 236 of the heating conductor portion 231 is changed so that the circumferential dimension thereof corresponds to the distance from the axis C1, the time for passing is kept constant, so that the heating time is made uniform. Is done. For this reason, uniform processing can be realized even when the moving speed of each part differs due to rotation. In addition, it is possible to easily achieve uniform heating temperature without complicating the heat treatment conditions with a simple configuration in which the cross-sectional area is constant and is bent at an angle corresponding to the peripheral speed.
- the heating conductor portion 231 When the heating conductor portion 231 is formed in a zigzag shape having a plurality of curved portions arranged opposite to each other, a strong magnetic field can be secured and a good temperature pattern can be obtained. For this reason, high-speed and uniform heat treatment can be performed with less power.
- the power is 100 kW
- the speed is 200 to 300 mm / sec when the surface temperature of the processing target N1 is 850 degrees
- the heating time It can be realized in 300 seconds. For this reason, even when the workpiece has a large diameter of about 3.5 m, heating exceeding the A3 transformation point can be realized by setting the cover ratio to about 1/3.
- the induction heating coil 226 having the zigzag-shaped heating conductor portion 231 By using the induction heating coil 226 having the zigzag-shaped heating conductor portion 231, for example, heat treatment of a large workpiece by moving partial heating that cannot be realized by a flat induction heating coil can be realized.
- the processing speed can be increased in this way, it is possible to perform the processing in the procedure of cooling after first performing the heat treatment while moving the entire processing target N1. For this reason, even in the case of partial heating, even when the part to be processed N1 has a loop shape, uniform heat treatment without a soft zone at the processing start end and end end is possible.
- the size of the heating conductor portion 231 is kept small even when the portion to be processed N1 and the workpiece W1 are large. Therefore, the entire induction heating device 210 can be reduced in size. For this reason, it is possible to reduce the required power and the manufacturing cost.
- FIG. 27 is a perspective view showing the configuration of the heating conductor 331 and the workpiece W2 of the induction heating apparatus 210 according to the present embodiment
- FIG. 28 is a plan view
- FIG. 29 is a side view
- FIG. 30 is a partial explanation.
- the workpiece W2 has a solid frustum shape, and the processing target portion N2, which is a surface on one end side in the axial direction, is inclined with respect to the axial direction and the radial direction. That is, in the first embodiment, the processing target N1 is a planar surface orthogonal to the axis, but in the fourteenth embodiment, the processing target N2 forms an inclined surface that is tilted about the axis.
- the basic configuration of the heating conductor portion 331 is the same as that of the heating conductor portion 231 of the first embodiment, and a plurality of bent portions 334 and 335 and a plurality of conductor portions 336 connecting them are continuously formed.
- the plurality of conductor portions 336 extend while intersecting with the circumferential direction R, and the circumferential length in a portion far from the axis C1 that is the center of rotation is longer than the circumferential length in a portion near the axis C1. It is configured to be long, and the length in the circumferential direction corresponds to the speed in the circumferential direction.
- the conductor portion 336 is bent so that the extension angle at the portion far from the axis C1 is smaller than the extension angle at the portion near the axis C1 with the cross-sectional area being constant. As a result, the circumferential speed and length correspond to each other.
- the relationship between the rotation radius r1 of the point P4, the rotation radius r3 of the reference point P6 facing the third portion 336c, the circumferential dimension M4 of the first portion 336a, and the circumferential dimension M6 of the third portion 336c is r1: r3 ⁇ .
- M4 Set to be M6. That is, the distance from the axis C1 is changed so as to correspond to the circumferential dimension, and the moving speed and the dimension in the moving direction are made to correspond.
- an example of relative movement by rotating the workpiece W1 is given as an example of relative movement.
- the present invention is not limited to this, and the heating conductor portion 231 side is aligned along the circumferential direction R.
- the relative movement may be performed by moving along a predetermined locus.
- FIG. 31 shows a fifteenth embodiment of the present invention. That is, when two induction heating devices 210 are installed, the two induction heating devices 210 are arranged at a central angle of 180 degrees so as to face each other like the induction heating and quenching device 202. In the case of three, it is installed at a position with a central angle of 120 degrees. When a plurality of induction heating devices 210 are used in this way, the coverage of one heating conductor can be reduced, and the heat treatment can be completed quickly by shortening the treatment time. Is preferred.
- the processing target portions N1 and N2 are illustrated as planar or inclined annular surfaces, but are not limited thereto, and may be circular shapes or shapes having other recesses or steps. Applicable. Moreover, although the solid frustum shape was illustrated in the said 2nd Embodiment, it may be hollow.
- the bent portion where the end portion of the bent portion is bent in a rectangular shape is exemplified, but the present invention is not limited to this.
- a structure having a curved portion having a semicircular shape may be used.
- both axial end surfaces form a circular plane or an inclined surface, it is also possible to apply to the both end surfaces.
- FIG. 32 shows a sixteenth embodiment of the present invention.
- four or more portions 346a, 346b, 346c, and 346d may be set and divided finely as in the conductor portion 346 shown in FIG. 32 to correspond to the circumferential speed and the circumferential dimension.
- FIG. 33 shows a seventeenth embodiment of the present invention.
- the conductor part 356 shown in FIG. 33 it may be smoothly curved so that the angle gradually increases toward the outer side in the radial direction, and the circumferential speed and the circumferential dimension may correspond to each other.
- Both the conductor portion 346 and the conductor portion 356 have the same dimensions (broken arrows) perpendicular to the extending directions C3 and C4 indicated by the dotted lines in the figure, and the dimensions in the moving direction R (solid line) are kept uniform. The arrow) is changed to correspond to the speed in the moving direction R.
- the division in the radial direction may be equally divided.
- the present invention is not limited to this and is not necessarily strictly proportional. Even if it is not, the present invention can be applied.
- FIG. 34 is an explanatory diagram schematically showing the overall configuration of the heat treatment apparatus according to the present embodiment.
- 35 to 37 show a plan view, a side view, and a front view of the heat treatment apparatus, respectively.
- the heat treatment apparatus 410 includes a moving support unit 411 that movably supports a workpiece E1 that is a processing target, and a processing target portion while moving relative to the processing target U1 of the workpiece E1.
- An induction heating unit 412 that induction-heats U1 and a cooling unit 413 (cooling unit) that cools the workpiece E1 after the heat treatment process of the processing target U1 are configured.
- the induction heating unit 412 includes a high-frequency power source 421 as a power supply unit, lead wires 422 and 423 connected to the high-frequency power source 421, and a pair connected to the lead wires 422 and 423.
- Spacers 428 having conductive plates 424 and 425, induction heating coils 426 whose both ends are connected to a pair of conductive plates 424 and 425, and a core 427 (on the back side of the heating conductor portion 431 of the induction heating coil 426) And only shown in FIGS. 35 and 38).
- the workpiece E1 as an example of the processing object shown in FIG. 34 is a thick part (thick part) having a thickness of 25 mm or more.
- the heating conductor portion 431 is disposed so as to face a part of the workpiece U1 of the workpiece E1 and secure a predetermined gap dimension K1.
- the Z direction that is the axial direction of the workpiece E1 is the first direction
- the circumferential direction R along the outer circumferential surface of the workpiece E1 with the axis C1 as the center is the second direction.
- the radial dimension in the circumferential direction R is a value obtained by adding the gap dimension K1 to the radial dimension r1 of the outer peripheral surface of the workpiece, and is r1 + K1.
- the to-be-processed part U1 comprises the endless loop shape which continues along the circumferential direction in the outer peripheral surface of the workpiece
- the workpiece E1 rotates about the axis C1 by the movement support portion 411, so that the processing target portion U1 and the heating conductor portion 431 move relative to each other along the circumferential direction R.
- the induction heating coil 426 includes a zigzag-shaped heating conductor portion 431 facing the processing target portion U1 of the workpiece E1 and a first connection continuous to one end side 431a of the heating conductor portion 431.
- a conductor portion 432 and a second connection conductor portion 433 that is continuous with the other end side 431b of the heating conductor portion 431 are provided continuously and integrally.
- the heating conductor portion 431 is formed of a conductor member 431w, and a plurality of U-shaped bent portions 434 and 435 open toward the center C2 in the Z direction and are alternately opposed to each other.
- a zigzag shape in which a plurality of pieces are continuously arranged along the circumferential direction R is formed.
- the bent portion 434 has a U-shape that opens downward
- the bent portion 435 has a U-shape that opens upward.
- the total dimension R2 in the second direction of the heating conductor part 431 is 1/10 or more and 1/2 or less of the dimension of the entire circumference in the second direction of the part to be processed U1 facing the heating conductor part 431.
- the coverage which is the ratio of the dimension in the second direction of the heating conductor portion 431 to the processing target portion U1, is set to be about 1/10 here.
- R5 which is the interval between the adjacent conductor members 431w
- R4 15 mm
- R5 20 mm in FIG.
- the first connecting conductor portion 432 includes a conductor portion 432a extending in the Y direction from the end portion of the one end side 431a of the heating conductor portion 431, and a width of the conductive plate 424 along the X direction by bending from the end portion of the conductor portion 432a.
- a conductor portion 432b extending toward the center in the direction, a conductor portion 432c bent toward the Y direction by bending at the center of the conductive plate 424, and a conductor portion 432d extending further in the Z direction are integrated integrally. It is configured to prepare for.
- a coupler 436 for connecting components such as a coolant hose is provided at the end of the first connection conductor portion 432.
- the second connection conductor portion 433 includes a conductor portion 433a extending in the Y direction from the end portion of the other end side 431b of the heating conductor portion 431, and a bent portion of the conductive plate 425 along the X direction by bending from the end portion of the conductor portion 433a.
- a conductor portion 433b extending toward the center in the width direction, a conductor portion 433c bent at the center of the conductive plate 425 and extending in the Y direction, and a conductor portion 433d further bent and extended in the Z direction are continuously provided. It is configured to be integrated.
- a coupler 437 for connecting components such as a coolant hose is provided at the end of the second connection conductor portion 433.
- the first connection conductor portion 432 and the second connection conductor portion 433 are arranged apart from each other in the thickness (Z-axis) direction with the spacer 428 interposed therebetween.
- the spacer 428 includes a pair of conductive plates 424 and 425 each having a rectangular flat plate shape, and a rectangular flat plate-like insulating plate 438 sandwiched between the pair of conductive plates 424 and 425 so as to overlap each other in the Z direction.
- the conductive plates 424 and 425 and the insulating plate 438 are configured to be fixed by bolts 441 and nuts 442 through an insulating bush 439.
- Each of the conductive plates 424 and 425 is connected to a high frequency power source 421 through lead wires 422 and 423.
- the induction heating coil 426 is formed of a material such as copper into a rectangular hollow shape, for example. This hollow portion 426a becomes a passage through which the coolant flows.
- the width dimension W1 of the induction heating coil 426 was set to 15 mm, and the thickness dimension T1 in the Y direction was set to 10 mm.
- the core 427 is made of a material having a high magnetic permeability such as a silicon steel plate, a polyiron core, or ferroton, and is disposed on the back side of the heating conductor portion 431.
- the moving support unit 411 shown in FIG. 34 rotates the workpiece E1 around the axis C1 with the workpiece E1 set at a predetermined position. At this time, the movement support part 411 controls the gap dimension K1 between the heating conductor part 431 and the workpiece E1 to be maintained at a predetermined value. Furthermore, the movement support unit 411 moves the workpiece E1 to the lower cooling unit 413 along the axial direction after the heat treatment is completed over the entire circumference (entire stroke) of the processing target unit U1.
- the cooling unit 413 provided below the heating coil 426 is configured in a cylindrical shape so as to surround the outside of the work E1 moved downward after the heat treatment, and cools the work E1 arranged in the inner space 413a.
- the heat treatment method of the present embodiment includes a moving heating process in which the processing target portion U1 is relatively moved while heating, and a cooling process in which the processing target portion U1 is cooled after the moving heating process.
- the high frequency power supply 421 when the high frequency power supply 421 is turned on with the heating conductor 431 facing a part of the processing target U1, the high frequency current is supplied to the lead wire 422.
- the first conductive plate 424, the first connection conductor 432, the heating conductor 431, the second connection conductor 433, the second conductive plate 425, and the lead wire 423 are sequentially returned to the high-frequency power source 421. .
- the high-frequency current flows in the heating conductor portion 431 from the one end 431a side to the other end 431b side as shown by the arrows in FIGS.
- positioned is heated.
- the workpiece E1 is rotated by rotating the workpiece E1 while the gap K1 between the surface of the workpiece U1 of the workpiece E1 and the surface of the heating conductor 431 is maintained at a predetermined value by the moving support portion 411.
- the heating conductor 431 moves relative to the processing unit U1 in the second direction at a predetermined speed.
- the to-be-processed part U1 whole region which is a strip
- positioned facing the heating conductor part 31 is heated uniformly.
- the movement support unit 411 moves the workpiece E1 to the lower cooling unit 413 along the Z direction.
- the cooling part 413 cools the workpiece
- the coolant flows through the hollow portion 426a inside the induction heating coil 426 and through the hollow portion 426a of the first connecting conductor portion 432, the heating conductor portion 431, and the second connecting conductor portion 433.
- the induction heating coil 426 and the conductive plates 424 and 425 are cooled.
- the following effects can be obtained. That is, by making the heating conductor portion 431 into a zigzag shape having a plurality of curved portions continuously, a strong magnetic field can be secured and a good temperature pattern can be obtained. For this reason, high-speed and uniform heat treatment can be performed with less power.
- the coil efficiency is about 30%, whereas when the zigzag shape is used as in this embodiment, a coil efficiency of about 70% can be ensured.
- the interval between the adjacent conductor members 431w is not less than 1 and not more than 2 times the width dimension of the conductor member 431w of the heating conductor portion 431, magnetic flux cancellation can be prevented and coil self-loss can be reduced. It is possible.
- the size of the heating conductor portion 431 is determined by arranging a plurality of portions.
- the heat treatment apparatus 410 can be reduced in size. For this reason, it is possible to reduce the required power and the manufacturing cost.
- a part having a thickness of 25 mm or more as a workpiece is a thick part (thick part).
- the present invention is not limited to this, and the induction heating unit 412 side is moved along a predetermined locus along the second direction. May be moved relative to each other.
- the two bent portions 434 and 435 are arranged two by two, the present invention is not limited to this, and the number of the bent portions 434 and the number of the bent portions 435 may be different. .
- the one induction heating part 12 was arrange
- An induction heating unit 12 may be disposed.
- the heating conductor portion 431 is configured to be curved so that the center protrudes from both ends in plan view, but is not limited to this, and can be appropriately changed according to the shape of the workpiece.
- FIG. 40 shows a twentieth embodiment of the present invention.
- the heating conductor portion 431 is configured to be bent in the opposite direction so that both end portions protrude from the center side.
- FIG. 41 shows a twenty-first embodiment of the present invention.
- the heating conductor portion 431 is configured to be linear in a plan view.
- the linear X direction is the first direction. In these cases, the same effect as the above embodiment can be obtained.
- FIG. 42 shows a twenty-second embodiment of the present invention.
- the bent portions 434 and 435 that are bent in a rectangular shape in a U shape are illustrated as the bent portion, but the present invention is not limited to this.
- heating is performed with a temperature pattern concentrated at the center C2 in the first direction. For this reason, for example, it is suitable when it is desired to increase the heating temperature on the center C2 side.
- the surface of a to-be-processed part may incline, a recessed part etc. It may have a step portion.
- the radius of the workpiece is about 250 mm and the coverage is about 1/10 is exemplified, but the present invention is not limited to this.
- the range of the coverage can be appropriately changed according to conditions such as the diameter of the workpiece. For example, a coverage of 1/10 or more and 1/2 or less and 1/10 to 1/3 is preferable. If it is less than 1/10, sufficient heating cannot be performed. If it exceeds 1/2, it is difficult for the coil to follow the workpiece expansion during heating. In addition, the equipment cost increases.
- the heating conductor part 431 was installed, the total circumferential dimension of the two heating conductor parts 431 was 600 mm, and the cover ratio was about 1/5.
- the heating conductor part 431 was installed in this, the total circumferential dimension of the four heating conductor parts 431 was 2400 mm, and the cover ratio was about 1/4.
- the heat treatment conditions were such that the power was 185 kW, the heating time was 280 s, and the temperature reached at the surface of the portion U1 to be treated was 920 degrees.
- FIG. 43 shows a plan view in which four induction heating coils 426 are arranged with the central angle shifted by 90 degrees as a twenty-third embodiment of the present invention.
- the case where the cover rate is 1/3 times and four heating conductor portions 431 are arranged along the second direction is shown.
- the total coverage of the four heating conductor portions 431 arranged at equal intervals is set to 1/3.
- the present invention is not limited to the above embodiment.
- the processing conditions and the specific shapes, materials, materials, dimensions, and the like of each component are not limited to those exemplified in the above embodiment, and can be changed as appropriate.
- the constituent elements over different embodiments may be combined.
- various modifications can be made without departing from the scope of the present invention.
- a technology capable of easily realizing a heat treatment in a desired heating region without requiring high electric power, a technology capable of uniform treatment, and a heat treatment efficiency when induction heating is performed even for a large processing object It is possible to provide a technique capable of improving the above.
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Abstract
Description
以下、本発明の第1実施形態にかかる誘導加熱焼入装置、及び誘導加熱焼入方法について、図1乃至図9を参照して説明する。図1は本実施形態に係る誘導加熱焼入装置1の構成を示す断面図、図2は平面図である。図1及び図2に示すように、誘導加熱焼入装置1は、処理対象物であるワークQ1を移動可能に支持する移動支持部(移動手段)と、ワークQ1の外周にそれぞれ複数配置された各加熱装置10A、10Bと、ワークQ1の加熱処理工程の後にワークQ1を冷却する冷却部13(冷却手段)と、を備えて構成される。下方に設けられた冷却部13は、加熱処理後に下方に移動したワークQ1の外側を囲むように筒状に構成され、内側の空間13aに配されたワークQ1を冷却する。
以下、本発明の第2実施形態にかかる誘導加熱焼入装置2について図10及び図11を参照して説明する。なお、ワークQ2及び加熱導体部31の形状以外は上記第1実施形態と同様であるため、共通する説明を省略する。なお、ワークQ2は円環状の平面部を有する円筒状の形状となっている。
次に、本発明の第3実施形態にかかる誘導加熱焼入装置2について図12を参照して説明する。なお、ワークQ3の形状と、加熱導体部31がワークQ3の傾斜面に沿っている点以外は上記実施形態と同様であるため、共通する説明を省略する。
以下、本発明の第4実施形態にかかる誘導加熱焼入装置3について図13を参照して説明する。図13は本実施形態に係る誘導加熱焼入装置の配置を示す説明図である。なお、ワークQ4の形状以外は上記第2実施形態と同様であるため、共通する説明を省略する。ワークQ4は中空体状であり、軸方向及び周方向に対して傾斜した内周面を有している。
以下、本発明の第5実施形態にかかる誘導加熱焼入装置4について図14を参照して説明する。なお、ワークQ5の形状及び被処理部Aが傾斜している点以外は上記第1実施形態と同様であるため、共通する説明を省略する。
図15は、本発明の第6実施形態として、半円周状に湾曲した形状の湾曲部(曲部)34,35を有する構造の第1加熱導体部31Cを適用してもよい。本実施形態においても上記第1~5実施形態と同様の効果を得ることができる。
図16は、本発明の第7実施形態として、に示すように台形状に屈曲した曲部34,35を有する構造の第1加熱導体部31Dを適用しても良い。本実施形態においても上記第1~5実施形態と同様の効果を得ることができる。
上記第1~5実施形態では、第1加熱装置10A及び第2加熱装置10Bをそれぞれ4箇所に配置した場合を例示したが、これに限られるものではない。
図18は、本発明の第9実施形態として、第1加熱装置10A及び第2加熱装置10Bをそれぞれ3つ配置した場合の位置関係を概略的に示したものである。本実施形態においても上記第1~5実施形態と同様の効果を得ることができる。
図19は、本発明の第10実施形態として、第1加熱装置10A及び第2加熱装置10Bをそれぞれ5つ配置した場合の位置関係を概略的に示したものである。本実施形態においても上記第1~5実施形態と同様の効果を得ることができる。
図20は、本発明の第11実施形態として、第1加熱装置10A及び第2加熱装置10Bをそれぞれ6つ配置した場合の位置関係を概略的に示したものである。本実施形態においても上記第1~5実施形態と同様の効果を得ることができる。
コイル配置は交互に配置したり、対向配置を例示したが、これに限るものではなく、1:3等、任意に配置できる。上記実施形態においては段差が1つであるワークQ1を例示したが、これに限られるものではなく、2以上の段差を有するワークを対象とした場合にも本発明を適用可能である。
以下、本発明の第13実施形態にかかる誘導加熱焼入装置201(熱処理装置)について、図22乃至図26を参照して説明する。
以下、本発明の第14実施形態にかかる誘導加熱装置210について図27乃至30を参照して説明する。なお、被処理部N2及び加熱導体部331が軸C1に対して傾斜している点以外は上記第13実施形態と同様であるため、共通する説明を省略する。
上記実施形態においては、1つの被処理部N1,N2に対して加熱導体部231、331一箇所のみに配置した場合を例示したが、これに限られるものではなく、周方向Rに沿って等間隔で複数の誘導加熱装置210を配置してもよい。
上記実施形態においては、径方向において3つの部位に区分けして設定したが、これに限られるものではない。2つまたは4つ以上に区分けしてもよい。
図33は、本発明の第17実施形態を示している。図33に示す導体部分356のように、径方向外側になるにつれて次第に角度が大きくなるように滑らかに湾曲させ、周方向速度と周方向寸法を対応させてもよい。導体部分346及び導体部分356は、いずれも、図中点線で示す延設方向C3,C4に直交する寸法(破線矢印)は一定として断面積を一様としたまま、移動方向Rの寸法(実線矢印)を、移動方向Rの速度に対応するように変化させている。また、径方向における区分けは等分としてもよい。
図34は本実施形態に係る熱処理装置の全体構成を概略的に示す説明図である。図35乃至図37は、それぞれ、熱処理装置の平面図、側面図、正面図を示す。
例えば2つの誘導加熱部412を設置する場合には、図39に示すように互いに対向するように中心角が180度ずれた位置に2つの誘導加熱コイル26を配置し、3つの場合には中心角を120度とする。
上述の実施形態では、加熱導体部431は平面視において中央が両端よりも突出するように湾曲した構成としたが、これに限られるものではなく、ワークの形状に応じて適宜変更可能である。図40は、本発明の第20実施形態を示している。円形のワークE2の内周面を被処理部U2とする場合には、加熱導体部431は両端部分が中央側よりも突出するように上記とは逆方向に湾曲した構成とする。
図41は、本発明の第21実施形態を示している。ワークE3の平面を被処理部U3とする場合には、加熱導体部431は平面視直線状となるように構成する。なお、この場合には直線状のX方向が第1方向となる。これらの場合にも上記実施形態と同様の効果が得られる。
図42は、本発明の第22実施形態を示している。上記実施形態では、曲部として、コ字状に矩形に屈曲した屈曲部434,435を例示したがこれに限られるものではない。例えば図9に示すように、半円周状に湾曲した形状の湾曲部534,535を有する構造としてもよい。この場合には、第1方向の中央C2に集中する温度パターンで加熱される。このため、例えば中央C2側の加熱温度を上げたい場合に好適となる。
図43は、本発明の第23実施形態として、4つの誘導加熱コイル426を中心角を90度ずつずらして配置した平面図を示す。カバー率を1/3倍とし、第2方向に沿って4つの加熱導体部431を配置した場合を示す。ここでは等間隔に配置される4つの加熱導体部431の合計のカバー率を1/3に設定した。このようにカバー率を設定することで、所望の処理時間及び処理効率を維持しつつ、誘導加熱装置の小型化が可能となる。また、複数の誘導加熱部412を用いることで、処理時間を短縮して加熱処理を早く完了することができるので、ワークのサイズが大きい場合に好適である。
Claims (31)
- 処理対象物と加熱コイルの少なくとも一方の回動により、前記処理対象物の被処理部の周方向に沿って前記処理対象物と前記加熱コイルを相対的に移動させるとともに、
前記被処理部の前記周方向と交差する軸方向の異なる部分を誘導加熱する加熱導体部を有する複数の加熱コイルを備え、
前記複数の加熱コイルのうち少なくとも1つは、前記軸方向の一方側に開口する曲部と、前記軸方向の他方側に開口する曲部とが、交互に、対向する向きで、前記周方向に沿って連続して配置されるジグザグ形状を成す加熱導体部を有することを特徴とする誘導加熱焼入装置。 - 前記加熱コイルは、隣り合う屈曲部の間隔が、前記加熱導体部の幅寸法の1倍以上、かつ、2倍以下であることを特徴とする請求項1記載の誘導加熱焼入装置。
- 前記複数の加熱コイルのうち少なくとも1つは、前記回転の周方向に対して交差して延びるとともに、前記回転移動の中心から遠い部位における前記周方向の長さが前記中心から近い部位における前記周方向の長さに比べて長く構成された加熱導体部分を有することを特徴とする請求項1記載の誘導加熱焼入装置。
- 前記加熱導体部分は、その断面積が一定であって、前記中心から遠い部位における延設角度が、前記中心から近い部位における延設角度に比べて、前記周方向に対する角度が小さくなるように曲成されたことを特徴とする請求項3記載の誘導加熱焼入装置。
- 前記加熱コイルの前記周方向の寸法は、前記被処理部の前記周方向の寸法の1/10以上1/2以下であることを特徴とする請求項1乃至4のいずれか記載の誘導加熱焼入装置。
- 前記被処理部は前記周方向に沿う無端のループ状に連続することを特徴とする請求項1乃至5のいずれか記載の誘導加熱焼入装置。
- 前記処理対象物の被処理部は1つ以上の段差を有することを特徴とする請求項1乃至6のいずれか記載の誘導加熱焼入装置。
- 前記処理対象物は鼓形状を成すことを特徴とする請求項1乃至5のいずれか記載の誘導加熱焼入装置。
- 前記処理対象物は中空体であって軸方向及び周方向に対して傾斜した内周面が形成されていることを特徴とする請求項1乃至5のいずれか記載の誘導加熱焼入装置。
- 前記複数の加熱コイルの加熱導体部により加熱される前記被処理部の各々の領域が、1つの連続した加熱領域をなすことを特徴とする請求項1乃至請求項9のいずれか記載の誘導加熱焼入装置。
- 前記被処理部の前記周方向における全行程において複数の前記加熱コイルによる加熱処理が施された後に前記被処理部の冷却処理を行う冷却部を備えたことを特徴とする請求項1乃至10のいずれか記載の誘導加熱焼入装置。
- 処理対象物の被処理部の周方向と交差する軸方向の異なる部分をそれぞれ誘導加熱する加熱導体部を有する複数の加熱コイルを、前記被処理部の少なくとも一部にそれぞれ対向させ、前記被処理部に対して前記複数の加熱コイルによる熱処理を施しながら、前記被処理部の周方向に沿って相対的に前記被処理部と前記加熱コイルを移動させる移動加熱工程を備え、
前記複数の加熱コイルの加熱導体部により加熱される前記被処理部の各々の領域が、1つの連続した加熱領域をなし、
前記複数の加熱コイルのうち少なくとも1つは、前記軸方向の一方側に開口する曲部と、前記軸方向の他方側に開口する曲部とが、交互に、対向する向きで、前記周方向に沿って連続して配置されるジグザグ形状を成す加熱導体部を有する誘導加熱焼入方法。 - 前記被処理部の前記周方向における全行程に対する移動加熱工程の後に、前記被処理部を冷却する冷却工程を備えたことを特徴とする請求項12記載の誘導加熱焼入方法。
- 被処理部の少なくとも一部に対向し、前記被処理部に対して相対的に回転移動しながら前記被処理部の熱処理を行う加熱導体部を備え、
前記加熱導体部は、前記回転の周方向に対して交差して延びるとともに、前記回転移動の中心から遠い部位における前記周方向の長さが前記中心から近い部位における前記周方向の長さに比べて長く構成された導体部分を有することを特徴とする誘導加熱コイル。 - 前記導体部分は、その断面積が一定であって、前記中心から遠い部位における延設角度が、前記中心から近い部位における延設角度に比べて、前記周方向に対する角度が小さくなるように曲成されたことを特徴とする請求項14記載の誘導加熱コイル。
- 前記加熱導体部は、前記周方向に交差する方向の一方側に開口する曲部と、他方側に開口する曲部とが、交互に、対向する向きで、前記周方向に沿って連続して配置されるジグザグ形状を成し、対向する曲部間に前記導体部分が配されることを特徴とする請求項14または15記載の誘導加熱コイル。
- 前記被処理部は、前記回転の軸方向に直交する平面を成し、
前記導体部分は、前記平面に沿って、前記被処理部に対向して配されることを特徴とする請求項14乃至16のいずれか記載の誘導加熱コイル。 - 前記被処理部は、前記回転の軸方向に対して傾斜する傾斜面を成し、
前記導体部分は、前記傾斜面に沿って、前記傾斜面に対向して配されることを特徴とする請求項14乃至16のいずれか記載の誘導加熱コイル。 - 請求項14乃至18のいずれかに記載の誘導加熱コイルと、
前記誘導加熱コイルに接続される高周波電源と、
前記被処理部及び前記誘導加熱コイルを相対的に前記周方向に移動させる移動手段と、を備えたことを特徴とする熱処理装置。 - 前記誘導加熱コイルが前記周方向に沿って複数配置されたことを特徴とする請求項19記載の熱処理装置。
- 前記被処理部の前記周方向における全行程に対する加熱処理の後に前記被処理部を冷却する冷却部を備えたことを特徴とする請求項19または20記載の熱処理装置。
- 請求項14乃至18のいずれかに記載の誘導加熱コイルを、前記被処理部に対向させて誘導加熱により前記被処理部を加熱しながら、前記被処理部を前記誘導加熱コイルに対して前記周方向に沿って相対的に移動させる移動加熱工程を備えることを特徴とする熱処理方法。
- 前記被処理部の前記周方向における全行程に対する加熱処理の後に、前記被処理部を冷却する冷却工程を備えたことを特徴とする請求項22記載の熱処理方法。
- 導体部材で形成され、第1方向の一方側に開口する曲部と、前記第1方向の他方側に開口する曲部とが、交互に、対向する向きで、前記第1方向に交差する第2方向に沿って連続して配置されるジグザグ形状を成す加熱導体部を有することを特徴とする誘導加熱コイル。
- 前記加熱導体部は、隣り合う曲部を形成する導体部材の間隔が、前記曲部を形成する導体部材の幅寸法の1倍以上、かつ、2倍以下であることを特徴とする請求項24記載の誘導加熱コイル。
- 前記加熱導体部の前記第2方向の寸法は、前記加熱導体部に対向する被処理部の前記第2方向の寸法の1/10以上1/2以下であることを特徴とする請求項24記載の誘導加熱コイル。
- 前記各曲部はそれぞれコ字形状に屈曲して構成されたことを特徴とする請求項24乃至26のいずれか記載の誘導加熱コイル。
- 前記被処理部は厚肉部であることを特徴とする請求項24乃至27のいずれか記載の誘導加熱コイル。
- 請求項24乃至28のいずれかに記載の誘導加熱コイルと、
前記誘導加熱コイルに接続される高周波電源と、
前記被処理部を前記誘導加熱コイルに対して前記第2方向に沿って相対的に移動させる移動手段と、を備えたことを特徴とする熱処理装置。 - 前記被処理部は前記第2方向に沿って連続する無端のループ状を成し、
前記被処理部を前記誘導加熱コイルに対して前記第2方向に沿って相対的に移動させながら前記被処理部の前記第2方向における全行程を加熱した後、前記被処理部の冷却処理を行う冷却部を備えたことを特徴とする請求項29記載の熱処理装置。 - 請求項24乃至28のいずれかに記載の誘導加熱コイルを、前記第2方向に沿って連続する無端のループ状を成す被処理部のうち一部に対向させて誘導加熱により前記被処理部を加熱しながら、前記被処理部を前記誘導加熱コイルに対して前記第2方向に沿って相対的に移動させる、移動加熱工程と、
前記被処理部の前記第2方向における全行程に対する加熱処理の後に、前記被処理部を冷却する冷却工程と、を備えたことを特徴とする、熱処理方法。
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