WO2011083817A1 - 誘導加熱コイル、加工部材の製造装置および製造方法 - Google Patents
誘導加熱コイル、加工部材の製造装置および製造方法 Download PDFInfo
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- WO2011083817A1 WO2011083817A1 PCT/JP2011/050093 JP2011050093W WO2011083817A1 WO 2011083817 A1 WO2011083817 A1 WO 2011083817A1 JP 2011050093 W JP2011050093 W JP 2011050093W WO 2011083817 A1 WO2011083817 A1 WO 2011083817A1
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- coil
- induction heating
- steel pipe
- heating coil
- metal material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/162—Heating equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/165—Cooling equipment
-
- 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
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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
- C21D11/00—Process control or regulation for heat treatments
-
- 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
-
- 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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—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
- H05B6/103—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor
- H05B6/104—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor metal pieces being elongated like wires or bands
-
- 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
- H05B6/44—Coil arrangements having more than one coil or coil segment
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- 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 an induction heating coil, a manufacturing member manufacturing apparatus, and a manufacturing method.
- the present invention provides, for example, an induction heating coil that is suitably used when manufacturing a hardened steel material such as a hardened steel pipe, a manufacturing apparatus for a processed member including the induction heating coil, and a manufacturing method for a processed member using the induction heating coil.
- a hardened steel material such as a hardened steel pipe
- a manufacturing apparatus for a processed member including the induction heating coil and a manufacturing method for a processed member using the induction heating coil.
- Metal strength members, reinforcing members or structural members are used in automobiles and various machines. These members are required to have high strength, light weight, and small size. Conventionally, these members have been manufactured by welding a stamped steel product, punching a thick steel plate, or forging an aluminum alloy. The weight reduction and miniaturization achieved by these manufacturing methods have reached their limits.
- Non-Patent Document 1 These members are manufactured by, for example, a hydroform disclosed in Non-Patent Document 1 in order to further reduce weight and size.
- Hydroform is complicated by supplying high-pressure machining fluid to the inside of the metal pipe placed inside the mold to bulge and deform the metal pipe and deform the metal pipe along the inner surface of the mold. A molded product having a shape is manufactured. Since hydroform is cold work, it is difficult to form a material with low ductility such as a tensile strength of 780 MPa or more into a complicated shape. Since a hydroform usually requires three steps of bending, preforming and hydroforming, the process becomes relatively complicated. Furthermore, the hydroform has a large processing machine and is relatively expensive.
- FIG. 6 is an explanatory view showing an outline of the manufacturing apparatus 0.
- the metal tube 1 in the following description, an example in which the metal tube is a steel tube
- the feed mechanism 3 feeds the steel pipe 1 from the upstream side toward the downstream side.
- the manufacturing apparatus 0 manufactures the bending member 8 by bending the steel pipe 1 downstream of the support mechanism 2.
- the induction heating coil 5 Downstream of the support mechanism 2, the induction heating coil 5 rapidly induction-heats the steel pipe 1 sent in the axial direction to a partially quenchable temperature range (Ac 3 points or more).
- the water cooling mechanism 6 rapidly cools the steel pipe 1 immediately downstream of the induction heating coil 5.
- a high temperature portion 1 a that moves in the axial direction of the steel pipe 1 is partially formed in the steel pipe 1 between the induction heating coil 5 and the water cooling mechanism 6.
- the deformation resistance of the high temperature part 1a is significantly smaller than the deformation resistance of other parts.
- the movable roller die 4 has at least one pair of roll pairs 4a.
- the roll pair 4a supports the steel pipe 1 while feeding it.
- the movable roller die 4 gives a bending moment to the high temperature portion 1a by moving in a two-dimensional or three-dimensional direction while supporting the steel pipe 1 in a region downstream of the water cooling mechanism 6.
- the manufacturing apparatus 0 performs a bending process on the steel pipe 1 with high work efficiency by a simple process using relatively inexpensive components 2 to 6, and has a desired shape and high strength (for example, a tensile strength of 780 MPa or more).
- the bending member 8 is manufactured.
- the induction heating is performed in order to heat the heated member uniformly in the circumferential direction. This is performed while rotating the member around the central axis.
- the manufacturing apparatus 0 induction-heats the steel pipe 1 by the induction heating coil 5 while feeding the steel pipe 1 in the axial direction without rotating. For this reason, it is difficult to heat the steel pipe 1 uniformly in the circumferential direction.
- the heating power in induction heating is determined by the ampere turn (ATurn), which is the product of the current value (A) passed through the induction heating coil 5 and the number of turns of the induction heating coil 5 (Turn).
- the manufacturing device 0 can process the steel pipe 1 with high accuracy.
- the heating width in the axial direction of the steel pipe 1 is preferably as narrow as possible in order to further increase the accuracy of bending by the manufacturing apparatus 0. This heating width becomes wider as the number of turns of the induction heating coil 5 increases. For this reason.
- the number of turns of the induction heating coil 5 is preferably as small as possible in order to narrow the heating width.
- the current value that can be passed through one induction heating coil 5 depends on the material and the cross-sectional area, and is generally about 10000 A at the maximum. For this reason, the number of turns of the induction heating coil 5 may have to be 2 or more when more energy is required to achieve both high productivity and good dimensional accuracy.
- FIG. 7 is an explanatory view showing an example of the induction heating coil 5 based on the conventional technical idea.
- FIG. 7A is a perspective view of the induction heating coil 5.
- FIG. 7B shows the induction heating coil 5 in which the main body 9-1 of the first winding and the main body 9-2 of the second winding are drawn by extending the distance in the direction parallel to the axial direction of the steel pipe 1. It is a perspective view which shows the structure of the heating coil 5 clearly.
- FIG.7 (c) is explanatory drawing which shows the projection of the induction heating coil 5 to the axial direction of the steel pipe 1, a solid line arrow shows the electric current flow in the main body 9-1 of the 1st volume, and a broken line arrow shows the 2nd volume. The current flow in the main body 9-2 is shown.
- FIG. 7D is an explanatory diagram showing an example of a temperature distribution by a numerical analysis simulation of the steel pipe 1 heated using the induction heating coil 5.
- the induction heating coil 5 has annular main bodies 9-1 and 9-2.
- the main bodies 9-1 and 9-2 are arranged around the steel pipe 1 and away from the steel pipe 1.
- the main body 9-1 has an insulating portion 9-1a formed by sandwiching an insulating plate
- the main body 9-2 has an insulating portion 9-2a formed by sandwiching the insulating plate.
- the two insulating portions 9-1a and 9-2a are provided between electrodes 9-3a and 9-3b for supplying an alternating current to the main bodies 9-1 and 9-2. Provided.
- the alternating current supplied to the main body 9-1 through one electrode 9-3a flows through the main body 9-1.
- the current flowing through the main body 9-1 flows in the order of the main body 9-2 and the electrode 9-3b.
- a magnetic flux is generated inside the main bodies 9-1 and 9-2. Since the flowing current is alternating current, the magnitude and direction of the magnetic flux change. For this reason, an eddy current is induced in the steel pipe 1 so as to generate a magnetic flux that cancels the change in the magnetic flux.
- This eddy current generates Joule heat due to the electric resistance of the steel pipe 1, and thereby induction heating is performed in which the steel pipe 1 is heated. Due to the so-called skin effect, the heat generation of the steel pipe 1 is concentrated on the surface layer of the steel pipe 1 as the frequency of the supplied alternating current is higher.
- the main body 9-1 of the first roll and the main body 9-2 of the second roll It is necessary to provide a coil connection portion 9-4 for connecting the two. Therefore, two insulating portions 9-1a and 9-2a made of an insulating plate are provided.
- the coil has a spiral shape, it is possible for those skilled in the art to connect the first roll body 9-1 and the second roll body 9-2 as close as possible to the object to be heated and at the shortest distance. It is common sense.
- the region S (between the insulating portions 9-1a and 9-2a) where the coil connecting portion 9-4 is arranged is arranged.
- Current flows in the axial direction of the steel pipe 1.
- the region S since the current flowing in the circumferential direction is one direction, the number of turns of the induction heating coil 5 is substantially one.
- the remaining region other than the region S the current flowing in the circumferential direction is in two directions, so the number of turns of the induction heating coil 5 is substantially two.
- the number of turns of the induction heating coil 5 is not the same with respect to the circumferential positions of the main bodies 9-1 and 9-2.
- the steel pipe 1 is induction-heated using the induction heating coil 5
- a temperature difference in the circumferential direction of the steel pipe 1 is inevitably generated.
- the inside of the induction heating coil 5 is conveyed while the non-rotating steel pipe 1 made of ordinary steel having an outer diameter (diameter) of 31.8 mm and a wall thickness of 1.8 mm is rotated in the axial direction at a conveying speed of 80 mm / sec.
- induction heating by passing as shown in FIG.
- An object of the present invention is to provide an induction heating coil capable of heating a metal material such as a steel pipe uniformly in the circumferential direction and stably in a narrow range in the axial direction.
- an induction heating coil capable of heating a metal material such as a steel pipe uniformly in the circumferential direction and stably in a narrow range in the axial direction.
- the configuration of the induction heating coil according to the present invention is as illustrated in FIG. 1, and (i) a first insulation that surrounds the outer periphery of the long metal material 1 in the circumferential direction and is arranged away from the metal material 1.
- a first one-turn coil body 11 having a portion 11b and a first electric conductor; and (ii) an inner periphery shape substantially the same as the inner periphery shape of the first one-turn coil body 11,
- a second one-turn coil provided with a second insulating portion 12b and a second electric conductor disposed in parallel with the first one-turn coil body 11 in the axial direction of the metal material 1 away from the metal material 1
- a main body connection that connects the main body 12 and (iii) a first adjacent portion 11c adjacent to the first insulating portion 11b in the circumferential direction and a second adjacent portion 12c adjacent to the second insulating portion 12b in the circumferential direction.
- the inner circumferential relationship of the coil length L0 of the induction heating coil in the effective coil length Le is, (L0-Le) / L0 is 0.05 or less.
- Inner coil length (Inner-Coil-Length) L0 means one round of the inner surface of the first one-turn coil body 11 or the second one-turn coil body 12 (including an insulating portion).
- Effective-Coil-Length Le means that the first electric conductor and the second electric conductor are in a cross section perpendicular to the relative movement direction of the induction heating coil 10 with respect to the metal material 1.
- the inner circumferential length of the region that overlaps (overlaps) when the electric conductor is projected that is, the inner circumferential length at which the substantial number of turns in the circumferential direction is equal to the number of turns of the entire coil.
- the inner peripheral coil length is 2 ⁇ R for a circular coil having an inner diameter R, and 2 ⁇ (a + b) for a rectangular coil having an inner short side a and an inner long side b.
- the effective coil length Le is “2 ⁇ R ⁇ L1 ⁇ subtracting the sum (L1 + L2) of the circumferential lengths L1 and L2 of the two insulating portions 11b and 12b from the inner peripheral coil length L0. L2 ".
- the present invention desirably has at least a first one-turn coil body and a second one-turn coil body that surround the outer periphery of a long metal material that is a heated object in the circumferential direction, and is not accompanied by rotation.
- a heating coil that inductively heats the metal material while moving relative to the long metal material, and a substantial number of coil turns when the coil is projected in a direction of movement relative to the metal material , Ln / L0 is 0.05 or less, where Ln is the coil inner circumference length of the region that is less than the total number of turns of the coil and L0 is the projected inner circumference length of L0. It is an induction heating coil.
- the first adjacent portion 11c and the second adjacent portion 12c are present at different positions in the cross section, specifically, the first one-turn coil body 11 or It is desirable that the second one-turn coil body 12 is present at a position 5 to 45 degrees away from the central angle of the second one-turn coil body 12.
- the induction heating coil according to the present invention has a shape that is significantly different from the shape conceived by the common knowledge of those skilled in the art. That is, the present invention has been completed as a result of placing the highest importance on the uniform number of coil windings in the circumferential direction without enlarging the total coil length or increasing the distance between the coil and the object to be heated. Therefore, an unexpected effect of uniformly heating the outer periphery of the non-rotating object to be heated can be obtained.
- the present invention relates to the induction heating coil 10 and the induction heating coil 10 while moving relative to the metal material 1 together with the induction heating coil 10.
- the present invention relates to the axial direction of the metal material 1 relative to the long metal material 1 that does not rotate the induction heating coil 10 around the central axis.
- the metal material 1 that is induction-heated by the induction heating coil 10 is cooled by the cooling mechanism 23 that moves relative to the metal material 1 together with the induction heating coil 10 while induction-heating the metal material 1 while moving to
- a bending moment is applied to the high temperature portion 1a.
- the metal material 1 is a hollow steel material having a closed cross-sectional shape, for example, a steel pipe.
- FIG. 1 is an explanatory view showing an example of an induction heating coil according to the present invention
- FIG. 1 (a) is a perspective view of the induction heating coil
- FIG. 1 (b) is a first view of the induction heating coil
- FIG. 1C is a perspective view showing the structure of the induction heating coil in an easy-to-understand manner by drawing a space between the one-turn coil body and the second one-turn coil body in a direction parallel to the axial direction of the steel pipe.
- FIG. 1 is an explanatory view showing the projection of the induction heating coil in the axial direction of the steel pipe
- FIG. 1D is an explanatory view showing an example of the temperature distribution by the numerical analysis simulation of the steel pipe heated using the induction heating coil. .
- FIG. 2 is an explanatory view schematically showing a processing member manufacturing apparatus to which the induction heating coil according to the present invention is applied.
- 3 (a) and 3 (b) are explanatory views showing the positional relationship between the induction heating coil and the steel pipe according to the present invention, and FIG. 3 (a) shows the first one-turn coil body and This is a case where the distance between the second one-turn coil body and the steel pipe is uniformly 3.0 mm, and FIG. 3B shows the insulating portions of the first one-turn coil body and the second one-turn coil body, respectively.
- FIG. 4 is a graph showing the temperature distribution in the axial direction when the steel pipe is heated by the induction heating coil according to the present invention.
- FIG. 5 is a graph showing the temperature distribution in the axial direction when the steel pipe is heated by the induction heating coil according to the comparative example.
- FIG. 6 is an explanatory diagram showing an outline of the bending apparatus disclosed in Patent Document 1. As shown in FIG. FIG. 7 is an explanatory view showing an example of an induction heating coil based on a conventional technical idea, FIG.
- FIG. 7 (a) is a perspective view of the induction heating coil
- FIG. 7 (b) is an induction heating coil
- FIG. 7 (c) is a perspective view showing the structure of the induction heating coil in an easy-to-understand manner by drawing the main body of the first roll and the main body of the second roll in a direction parallel to the axial direction of the steel pipe. It is explanatory drawing which shows the projection of the induction heating coil to the axial direction of a steel pipe
- FIG.7 (d) is explanatory drawing which shows an example of the temperature distribution by the numerical analysis simulation of the steel pipe heated using the induction heating coil.
- the present invention is not limited to the case where the metal material is a steel pipe.
- the present invention is applied to a hollow metal member having a closed cross-sectional shape.
- a hollow metal material having a cross-sectional shape of a rectangle, an ellipse, an oval, a polygon, a combination of a polygon and a circle, or a cross-sectional shape of a combination of a polygon and an ellipse is exemplified as the hollow member.
- FIG. 1 is an explanatory diagram showing an example of an induction heating coil 10 according to the present invention.
- FIG. 1A is a perspective view of the induction heating coil 10
- FIG. 1B is a steel pipe 1 of the first one-turn coil body 11 and the second one-turn coil body 12 of the induction heating coil 10.
- FIG. 1C is a perspective view showing the structure of the induction heating coil 10 in an easy-to-understand manner by drawing the space in the direction parallel to the axial direction of the steel tube 1.
- FIG. 1C is a projection of the induction heating coil 10 in the axial direction of the steel pipe 1.
- FIG. 1D is an explanatory diagram showing an example of a temperature distribution by a numerical analysis simulation of the steel pipe 1 heated using the induction heating coil 10.
- the top design in the legend indicates that the temperature is over 950 ° C. and below 1000 ° C.
- the second design from the top indicates that it is above 900 ° C. and below 950 ° C.
- the bottom design shows that it is 550 ° C or lower.
- the induction heating coil 10 induction-heats the steel pipe 1 while moving relative to the steel pipe 1 in the axial direction of the steel pipe 1.
- the induction heating coil 10 includes a first one-turn coil body 11 and a second one-turn coil body 12.
- the induction heating coil 10 is substantially the same as including the first heating coil 11 of one turn and the second heating coil 12 of one turn.
- the long steel pipe 1 is fed in the axial direction without rotating around the central axis.
- the first one-turn coil body 11 is made of a copper alloy and has an annular outer shape.
- the first one-turn coil body 11 includes a first electric conductor and a first insulating portion 11b in a part of the circumferential direction.
- the first insulating portion 11b is desirably thin.
- the thickness of the first insulating portion 11b is exemplified to be about 1 to 2 mm in order to ensure insulation.
- the first one-turn coil body 11 is disposed around the steel pipe 1 at a predetermined distance from the steel pipe 1 and covering the entire circumference of the steel pipe 1.
- the electrode 13a is provided on the first adjacent portion 11c of the first electric conductor located next to the first insulating portion 11b.
- the alternating current supplied from the electrode 13a to the first one-turn coil body 11 circulates around the first electric conductor of the first one-turn coil body 11, and then passes through the main body connecting portion 14 described later.
- a magnetic flux is generated inside the first one-turn coil body 11. Since the flowing current is an alternating current, the magnitude and direction of the magnetic flux change, and the eddy current is induced in the steel pipe 1 so as to generate a magnetic flux that cancels the change in the magnetic flux.
- induction heating is performed in which the eddy current generates Joule heat due to the electric resistance of the steel pipe 1, thereby heating the steel pipe 1.
- the second one-turn coil body 12 is made of a copper alloy and has an annular outer shape.
- the second one-turn coil body 12 includes a second electric conductor and a second insulating portion 12b in a part of the circumferential direction.
- the thickness of the second insulating portion 12b is desirably thin. In order to ensure insulation, the thickness of the second insulating portion 12b is exemplified to be about 1 to 2 mm.
- the second one-turn coil body 12 is arranged around the steel pipe 1 at a predetermined distance from the steel pipe 1 and covering the entire circumference of the steel pipe 1.
- the second one-turn coil body 12 is arranged in a row with the first one-turn coil body 11 in the axial direction of the steel pipe 1.
- the second one-turn coil body 12 has the same inner peripheral shape as the inner periphery shape of the first one-turn coil body 11. Further, the second one-turn coil body 12 has the same outer peripheral shape as that of the first one-turn coil body 11.
- the electrode 13c is provided on the second adjacent portion 12c of the second electric conductor, which is located next to the second insulating portion 12b.
- the alternating current supplied to the second electrical conductor of the second one-turn coil body 12 from the main body connecting portion 14 described later circulates around the second electric conductor of the second one-turn coil body 12, It flows to the electrode 13c. Thereby, magnetic flux is generated inside the second one-turn coil body 12. Since the flowing current is an alternating current, the magnitude and direction of the magnetic flux change, and the eddy current is induced in the steel pipe 1 so as to generate a magnetic flux that cancels the change in the magnetic flux. At this time, induction heating is performed in which the eddy current generates Joule heat due to the electric resistance of the steel pipe 1, thereby heating the steel pipe 1.
- the main body connecting portion 14 connects the first adjacent portion 11c adjacent to the first insulating portion 11b in the circumferential direction and the second adjacent portion 12c adjacent to the second insulating portion 12b in the circumferential direction.
- a cross section orthogonal to the relative moving direction of the induction heating coil 10 with respect to the steel pipe 1 and projected in the axial direction of the steel pipe 1 (hereinafter referred to as “projected cross section” in this specification). ),
- the first adjacent portion 11c and the second adjacent portion 12c are located at different positions. Therefore, as shown in FIG. 1A and FIG. It has a cross-sectional shape bent 90 degrees into an L shape.
- the main body connecting portion 14 converts the alternating current flowing from the first adjacent portion 11c of the first one-turn coil body 11 into the second one turn via the second adjacent portion 12c of the second one-turn coil body.
- the coil body 12 is supplied.
- the ineffective coil length Ln at which the substantial number of coil turns in the circumferential direction is less than the total number of coil turns is equal to the width of the second insulating portion 12 b. It is the total length (L1 + L2) of L1 of the first insulating portion 11b, and the ineffective coil length Ln is 5% or less of the inner peripheral coil length L0. Desirably, Ln ⁇ 0.03 ⁇ L0.
- the first adjacent portion 11c and the second adjacent portion 12c are present at different positions in the projected cross section.
- the central angle of the first one-turn coil body 11 or the second one-turn coil body 12 be 5 to 45 degrees apart.
- the ineffective coil length in which the number of coil turns is substantially 1 is the region S (insulation) where the coil connection portion 9-4 is disposed. (The region between the portions 9-1a and 9-2a) plus the insulating portion 9-1a and the insulating portion 9-2a, which is as wide as the coil width.
- the region where the number of coil turns is substantially 1, the region where the first insulating portion 11b exists, and the second insulating portion 12b.
- the region where the current flows in the circumferential direction is substantially reduced, and the region where the current flowing in the circumferential direction is substantially equivalent to one turn is greatly reduced.
- the diameter of the steel pipe 1 is 31.8 mm and the first one-turn coil body 11 or the second one
- the total length (L1 + L2) of the width L1 of the second insulating portion 12b and the width L2 of the first insulating portion 11b is the first one-turn coil body.
- 11 or the inner coil length 118.75 mm of the second one-turn coil body 12 is about 3.4%.
- the total length (L1 + L2) is the first length. This is approximately 4.1% of the inner coil length of the one-turn coil body 11 or the second one-turn coil body 12.
- the ineffective coil length is almost equal to the coil width.
- the ineffective coil length is about 15% of the inner coil length.
- the induction heating coil 5 based on the conventional technical idea.
- the temperature difference in the circumferential direction of the steel pipe 1 is remarkably reduced as compared with the case where the steel pipe 1 is induction-heated using.
- an induction heating coil 10 or induction heating is performed while a steel pipe 1 made of ordinary steel having an outer diameter (diameter) of 31.8 mm and a wall thickness of 1.8 mm is conveyed in the axial direction at a conveyance speed of 80 mm / sec. Induction heating is performed by passing the inside of the coil 5.
- the temperature difference in the circumferential direction generated in the steel pipe 1 is about 240 ° C. in the induction heating coil 5, but is reduced to about 80 ° C. in the induction heating coil 10.
- the induction heating coil 10 can heat the steel pipe 1 uniformly in a circumferential direction and stably in a narrow range.
- the induction heating coil 10 includes two one-turn coil bodies 11 and 12 is taken as an example.
- the present invention is not limited to this form.
- the induction heating coil of the present invention may have three or more one-turn coil bodies.
- the third one-turn coil body is located between the first one-turn coil body 11 and the second one-turn coil body 12, or next to the first one-turn coil body 12 or the second one-turn coil body 12.
- the first one-turn coil body 11 and the second one-turn coil body 12 are arranged in a row. For reasons such as narrowing the heating width and restrictions on the installation location, it is desirable that the number of one-turn coil bodies be two or three.
- the shape of the induction heating coil is not limited to a circular shape, for example, a rectangular shape, an elliptical shape, an oval shape, a polygonal shape, a cross-sectional shape of a combination of a polygon and a circle, or a combination of a polygon and an ellipse.
- a cross-sectional shape may be sufficient.
- FIG. 2 is an explanatory view schematically showing a machined member manufacturing apparatus 20 to which the induction heating coil 10 according to the present invention is applied.
- the manufacturing apparatus 20 includes a feed mechanism 21, a support mechanism 22, an induction heating coil 10, a cooling mechanism 23, and a gripping mechanism 24. These components will be described sequentially.
- the feed mechanism 21 feeds the steel pipe 1 in the longitudinal direction.
- a mechanism using an electric servo cylinder is exemplified as the feed mechanism 21.
- the feed mechanism 21 is not limited to a specific type of mechanism.
- a known mechanism such as a mechanism using a ball screw or a mechanism using a timing belt or a chain is equally used as this type of feeding mechanism for the steel pipe 1.
- the steel pipe 1 is supported by a gripping mechanism 25 so as to be movable.
- the feed mechanism 21 feeds the steel pipe 1 in the axial direction (longitudinal direction) at a predetermined feed speed.
- the gripping mechanism 25 supports the steel pipe 1 in order to feed the steel pipe 1.
- the gripping mechanism 25 may be omitted when a support mechanism 22 described later is installed.
- the feed mechanism 21 feeds the steel pipe 1 in the axial direction, and the induction heating coil 10 and the cooling mechanism 23 are fixedly installed.
- the induction heating coil 10 and the cooling device 23 may be installed so as to be relatively movable with respect to the steel pipe 1. For example, (a) while fixing and arranging the steel pipe 1 without sending it, the induction heating coil 10 and the cooling mechanism 23 move relative to the steel pipe 1, and (b) sending the steel pipe 1 in its axial direction, Further movement of the induction heating coil 10 and the cooling mechanism 23 relative to the steel pipe 1 is allowed.
- the support mechanism 22 supports the steel pipe 1 fed in the axial direction by the feed mechanism 21 at the first position A so as to be movable.
- a fixed guide is exemplified as the support mechanism 22.
- the support mechanism 22 is not limited to a particular type of mechanism. For example, a pair or a pair of non-driving rolls arranged to face each other may be used as the support mechanism 22. A known mechanism as this type of support mechanism is equally used as the support mechanism 22.
- the steel pipe 1 passes through the installation position A of the support mechanism and is sent in the axial direction.
- the support mechanism 22 may be substituted by a gripping mechanism 25.
- the induction heating coil 10 rapidly heats the steel pipe 1 at a second position B located downstream of the first position A in the feed direction of the steel pipe 1.
- the induction heating coil 10 is fed at a feed rate of 5 to 150 mm / sec by supplying an alternating current having a frequency of 5 to 100 kHz to the first one-turn coil body 11 and the second one-turn coil body 12.
- the steel pipe 1 to be obtained is induction heated at the second position B.
- FIG. 3 (a) and 3 (b) are explanatory views showing the positional relationship between the induction heating coil 10 and the steel pipe 1
- FIG. 3 (a) shows the first one-turn coil body 11 and the first coil 2 is a case where the distance between the 1-turn coil body 12 and the steel pipe 1 is uniformly 3.0 mm
- FIG. 3B shows the insulating portion 11b of the first 1-turn coil body 11 and the second 1 turn.
- the distance between the second insulating portion 12b of the coil body and the steel pipe 1 is 2.0 mm
- the temperature of the steel pipe 1 in the vicinity of the first insulating portion 11b and the second insulating portion 12b is lower than the temperature of the steel pipe 1 at other positions, and the circumferential direction of the steel pipe 1 is reduced.
- the temperature difference is about 80 ° C.
- the difference between the temperature of the steel pipe 1 in the vicinity of the first insulating portion 11b and the second insulating portion 12b and the temperature of the steel pipe 1 at other positions is reduced.
- the temperature difference in the circumferential direction of the steel pipe 1 is about 40 ° C.
- the steel pipe 1 can be heated a plurality of times by using in combination with at least one preheating means for the steel pipe 1 provided on the upstream side of the induction heating coil 10. Thereby, the temperature difference in the circumferential direction of the steel pipe 1 can be further reduced.
- the steel pipe 1 to be fed can be heated non-uniformly in the circumferential direction or the axial direction. Thereby, the temperature difference in the circumferential direction of the steel pipe 1 can be further reduced.
- the steel pipe 1 is rapidly heated by the induction heating coil 10 while the temperature difference in the circumferential direction is significantly reduced as illustrated in FIG. [Cooling mechanism 23]
- the cooling mechanism 23 is arranged at a third position C downstream of the second position B in the feed direction of the steel pipe 1.
- the cooling mechanism 23 cools the heated steel pipe 1.
- the high temperature part 1a which moves to the axial direction of the steel pipe 1 is partially formed.
- the deformation resistance of the high temperature portion 1a is significantly lower than that of other portions.
- the cooling mechanism 23 only needs to be able to cool the steel pipe 1 at a desired cooling rate, and is not limited to a specific type of cooling mechanism.
- a water cooling mechanism that cools the steel pipe 1 by injecting cooling water to a predetermined position on the outer surface of the steel pipe 1 is exemplified as the cooling mechanism 23.
- the cooling water is sprayed with an inclination toward the feeding direction of the steel pipe 1.
- the distance of the cooling mechanism 23 for the steel pipe 1 in the direction parallel to the direction orthogonal to the axial direction of the steel pipe 1 can be adjusted.
- the gripping mechanism 24 is disposed in a region D downstream of the third position C in the feed direction of the steel pipe 1.
- the gripping mechanism 24 moves in a three-dimensional direction in a work space including a space upstream of the third position C in the feed direction of the steel pipe 1 while gripping the steel pipe 1.
- the gripping mechanism 24 gives a bending moment to the high temperature portion 1 a formed in the steel pipe 1.
- a chuck mechanism is used as the gripping mechanism 24.
- a bending member for example, a bending member having a two-dimensionally different bending direction, such as S-shaped bending, by performing a bending process in which the bending direction is two-dimensionally different by moving the gripping mechanism 24 two-dimensionally. Is possible.
- “Workspace” means a three-dimensional space defined by equations (1), (2), and (3).
- x ⁇ 0 and (y 0 or y ⁇ 0.5D) and 0 ⁇ ⁇ ⁇ 360 °
- D means the minimum outer dimension (mm) of the bending member
- Rmin means the minimum radius of curvature (mm) of the bending member
- x, y, and ⁇ are the second values.
- the steel pipe 1 is bent by moving the gripping mechanism 24 in a three-dimensional direction in the work space, and thereby a bending member having a bent portion intermittently or continuously in the longitudinal direction is manufactured. .
- the gripping mechanism 24 includes a main body 26 having a columnar outer shape and a moving mechanism 29.
- the main body 26 is constituted by a hollow body.
- the hollow body has an inner peripheral surface shaped along the outer peripheral surface of the steel pipe 1.
- the main body 26 grips the steel pipe 1 by being disposed in contact with the outer surface of the tip portion of the steel pipe 1.
- the main body 26 may be configured by a cylindrical body having an outer peripheral surface shaped along the inner peripheral surface of the steel pipe 1. In this case, the main body 26 grips the steel pipe 1 by being inserted and disposed inside the distal end portion of the steel pipe 1.
- the moving mechanism 29 includes a first base 27 and a second base 28.
- the first base 27 mounts the main body 26 and is arranged to be movable in a direction (vertical direction in FIG. 1) orthogonal to the feed direction of the steel pipe 1 at the first position A.
- the second base 28 is disposed on the first base 27 so as to be movable in the feeding direction.
- reference numeral 30 indicates an X-axis tilt motor
- reference numeral 31 indicates an X-axis shift motor
- reference numeral 32 indicates a Y-axis tilt motor
- reference numeral 33 indicates a Y-axis shift motor
- reference numeral 34 indicates a Z-axis motor.
- a tilt motor is shown, and a reference numeral 35 denotes a Z-axis shift motor.
- an articulated robot having a joint that can rotate around at least one axis may support the main body 26.
- an articulated robot By using an articulated robot, it becomes easy to support the main body 26 movably in a three-dimensional direction.
- the long steel pipe 1 having a closed cross-sectional shape is supported at the first position A by the support mechanism 22 and is sent in the longitudinal direction by the feed mechanism 21.
- the steel pipe 1 fed at a feed rate of 5 to 150 mm / sec is induction heated.
- the high temperature portion 1 a is formed in the steel pipe 1. Further, in the region D, the position of the gripping mechanism 24 is changed to a three-dimensional direction in a work space including a space upstream of the third position C in the feed direction of the steel pipe 1, and the high temperature portion of the steel pipe 1 is changed. Giving a bending moment to 1a is continuously performed according to the target product shape.
- a bent product having a bending portion bent in three dimensions intermittently or continuously in the longitudinal direction is continuously manufactured.
- the steel pipe 1 is heated to a temperature at which the steel pipe 1 can be partially quenched at the second position B, and is cooled at a predetermined cooling rate at the third position C, whereby a part or all of the steel pipe 1 is obtained.
- a bending process product has a quenching part intermittently or continuously toward the outer peripheral direction in the cross section which cross
- the manufacturing apparatus 20 is (A) An uncoiler that continuously feeds the strip-shaped steel plate, which forms the ERW steel pipe production line, a forming device that forms the fed strip-shaped steel plate into a pipe having a predetermined cross-sectional shape, and both side edges of the butted strip-shaped steel plates On the outlet side of the post-processing device in the continuous production device for bending products, comprising a welding device for welding to form a continuous tube, and a post-processing device for post-annealing and sizing the weld bead and if necessary, Or (b) a continuous production apparatus for a bent product comprising an uncoiler for continuously feeding a strip-shaped steel plate, and a forming mechanism for forming the fed strip-shaped steel plate into a predetermined cross-sectional shape, constituting a roll forming line Bending products can be continuously manufactured by arranging them on the exit side of the forming mechanism.
- the heated The heating region can be formed uniformly in the circumferential direction of the metal material as a body and stably in a narrow range in the axial direction of the metal material.
- the radius of curvature in the longitudinal direction is not constant, and at least two different radii of curvature in the longitudinal direction. It is possible to manufacture a bent product having these parts efficiently and inexpensively.
- the present invention is widely applied, for example, as a bending technique for a further advanced bending product for automobiles, for example.
- the hardened steel material produced according to the present invention is applicable to, for example, uses (i) to (vii) exemplified below.
- Automotive strength members such as lower arms and brake pedals of automobile suspensions;
- Reinforcing members such as various types of automobile reinforcements and braces,
- Automotive structural members such as bumpers, door impact beams, side members, suspension mount members, pillars, side sills,
- Frames for bicycles and motorcycles cranks
- Reinforcing members for vehicles such as trains, cart parts (cart frames, various beams, etc.)
- Frame parts such as hulls, reinforcing members
- Vii) Home appliance strength member reinforcing member or structural member
- the steel pipe 1 made of ordinary steel having an outer diameter (diameter) of 31.8 mm and a wall thickness of 1.8 mm is conveyed in the axial direction at a conveying speed of 80 mm / sec in a non-rotating manner
- the induction heating coil 10 or 5 Induction heating was performed by passing through the interior.
- a plurality of thermocouples were attached to two portions P1 and P2 in the circumferential direction of the steel pipe 1, and the temperature of the steel pipe 1 during heating was measured while conveying the steel pipe 1.
- FIG. 4 is a graph showing the results of the example of the present invention
- FIG. 5 is a graph showing the results of the comparative example.
- the measurement positions are the parts P1 and P2 shown in the graphs of FIGS.
- the part P1 is a position of a region sandwiched between the first insulating part 11b and the second insulating part 12b in the cross section, that is, a position where the number of coil turns is substantially one in the induction heating coil 5 of the comparative example. It is.
- the part P2 is a position that is 90 degrees away from the part P1 by the central angle of the main body 11. 4 and 5, the solid line is the measurement result of the part P, and the broken line is the measurement result of the part P2.
- the vertical axis T represents the temperature (° C.) of the steel pipe 1
- the horizontal axis SP represents the feed position (mm) in the axial direction of the steel pipe 1.
- the temperature difference in the circumferential direction of the steel pipe 1 is about 260 ° C.
- the comparative example as shown in the graph of FIG. The temperature difference is reduced to about 80 ° C.
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Abstract
Description
金属管1(以降の説明では、金属管が鋼管である場合を例にとる)は、支持機構2によって軸方向へ移動自在に支持される。送り機構3は、鋼管1を上流側から下流側へ向けて送る。製造装置0は、支持機構2の下流において鋼管1に曲げ加工を行うことによって、曲げ部材8を製造する。
図7(a)~図7(c)に示すように、誘導加熱コイル5は環状の本体9-1、9-2を有する。本体9-1、9-2は、鋼管1の周囲に鋼管1から離れて配置される。本体9-1は絶縁板を挟むことにより形成される絶縁部9-1aを有するとともに、本体9-2は絶縁板を挟むことにより形成される絶縁部9-2aを有する。図7(c)に示すように、二つの絶縁部9-1a、9-2aは、本体9-1、9-2に交流電流を供給するための電極9-3a、9-3bの間に設けられる。
1 鋼管
2 支持機構
3 送り機構
4 可動ローラダイス
4a ロール対
5 誘導加熱コイル
6 水冷機構
8 曲げ部材
9-1 1巻き目の本体
9-2 2巻き目の本体
9-1a、9-2a 絶縁部
9-3a、9-3b 電極
9-4 コイル接続部
10 本発明に係る誘導加熱コイル
11 第1の1巻きコイル本体
11b 第1の絶縁部
11c 第1の隣接部分
12 第2の1巻きコイル本体
12b 第2の絶縁部
12c 第2の隣接部分
13a、13c 電極
14 本体接続部
20 本発明に係る製造装置
21 送り機構
22 支持機構
23 冷却機構
24 把持機構
25 つかみ機構
26 本体
27 第1の基盤
28 第2の基盤
29 移動機構
図1は、本発明に係る誘導加熱コイル10の一例を示す説明図である。図1(a)は、誘導加熱コイル10の斜視図であり、図1(b)は、誘導加熱コイル10の第1の1巻きコイル本体11および第2の1巻きコイル本体12の、鋼管1の軸方向と平行な方向への間隔を広げて描くことによって誘導加熱コイル10の構造をわかり易く示す斜視図であり、図1(c)は、鋼管1の軸方向への誘導加熱コイル10の投影を示す説明図であり、図1(d)は誘導加熱コイル10を用いて加熱された鋼管1の数値解析シミュレーションによる温度分布の一例を示す説明図である。図1(d)において、凡例における一番上のデザインは950℃超1000℃以下であることを示し、上から2番目のデザインは900℃超950℃以下であることを示し、以下同様であって、一番下のデザインは550℃以下であることを示す。
誘導加熱コイル10は、第1の1巻きコイル本体11および第2の1巻きコイル本体12を備える。誘導加熱コイル10は、1巻きの第1の加熱コイル11と1巻きの第2の加熱コイル12とを備えることに、実質的に同じである。
第1の1巻きコイル本体11は、銅合金製であり、環状の外形を備える。第1の1巻きコイル本体11は、第1の電気伝導体と、周方向の一部に第1の絶縁部11bとを有する。第1の絶縁部11bの厚みは薄いことが望ましい。第1の絶縁部11bの厚みは、絶縁性を確実に確保するために、1~2mm程度であることが例示される。第1の1巻きコイル本体11は、鋼管1の周囲に鋼管1から所定距離離れて、かつ鋼管1の全周を覆って、配置される。
後述するように、鋼管1に対する誘導加熱コイル10の相対的な移動方向に直交するとともに鋼管1の軸方向へ投影された断面(以降、本明細書では「投影横断面」と省略して記載する)において、第1の隣接部分11cと、第2の隣接部分12cとが互いに異なる位置に存在するため、図1(a)および図1(b)に示すように、本体接続部14は、略L字型に90度屈曲した断面形状を有する。
誘導加熱コイル10を曲げ加工装置0に適用して、加工部材を製造する状況を説明する。
同図に示すように、この製造装置20は、送り機構21と、支持機構22と、誘導加熱コイル10と、冷却機構23と、把持機構24とを備える。これらの構成機器を順次説明する。
送り機構21は、鋼管1をその長手方向へ送る。
電動サーボシリンダーを用いた機構が送り機構21として例示される。送り機構21は、特定の型式の機構には限定されない。例えば、ボールネジを用いた機構やタイミングベルトやチェーンを用いた機構といった、鋼管1のこの種の送り機構として公知の機構が等しく用いられる。
支持機構22は、送り機構21により軸方向へ送られる鋼管1を、第1の位置Aにおいて移動自在に支持する。
[誘導加熱コイル10]
誘導加熱コイル10は、第1の位置Aよりも鋼管1の送り方向の下流に位置する第2の位置Bにおいて、鋼管1を急速に加熱する。
[冷却機構23]
冷却機構23は、第2の位置Bよりも鋼管1の送り方向の下流の第3の位置Cに、配置される。冷却機構23は、加熱された鋼管1を冷却する。鋼管1は、冷却機構23により冷却されることにより、鋼管1の軸方向へ移動する高温部1aが部分的に形成される。高温部1aは、他の部分よりも変形抵抗が大幅に低下している。
把持機構24は、第3の位置Cよりも鋼管1の送り方向の下流の領域Dに配置される。把持機構24は、鋼管1を把持しながら、第3の位置Cよりも鋼管1の送り方向の上流側の空間を含むワークスペース(work space)内において三次元の方向へ移動する。これにより、把持機構24は、鋼管1に形成されている高温部1aに曲げモーメントを与える。一般的には、チャック機構が把持機構24として用いられる。
x<0かつ(y=0またはy≧0.5D)かつ0≦θ<360° ・・・・・(1)
x2+(y-Rmin)2≧Rmin2 ・・・・(2)
x2+(y+Rmin)2≧Rmin2-(0.5D-Rmin)2+(0.5D+Rmin)2 ・・・・(3)
ただし、式(1)~(3)において、Dは屈曲部材の最小外形寸法(mm)を意味し、Rminは屈曲部材の最小曲率半径(mm)を意味し、x、y、θは第2の位置を原点とする円柱座標系であって、屈曲部材の瞬間的な送り方向をxの正方向とし、xと水平面内で直交する方向をyとし、周方向の角度をθとする。
把持機構24は、柱状の外形を有する本体26と移動機構29とを備える。
閉じた断面形状を有する長尺の鋼管1を、支持機構22により第1の位置Aにおいて支持するとともに送り機構21によりその長手方向へ送る。
さらに、領域Dで、把持機構24の位置を、第3の位置Cよりも鋼管1の送り方向の上流側の空間を含むワークスペース内において三次元の方向へ変更して、鋼管1の高温部1aに曲げモーメントを与えることを、目標とする製品形状に合わせて継続して行う。
この場合に、第2の位置Bにおいて鋼管1を部分的に焼入れが可能な温度に加熱するとともに、第3の位置Cにおいて所定の冷却速度で冷却することにより、鋼管1の一部または全部を焼入れることができる。これにより、曲げ加工製品は、少なくとも長手方向及び/又はこの長手方向と交差する断面内における外周方向へ向けて、断続的又は連続的に焼入れ部を有する。
(a)電縫鋼管製造ラインを構成する、帯状鋼板を連続的に繰り出すアンコイラーと、繰り出された帯状鋼板を所定の断面形状の管に成形する成形装置と、突き合わされた帯状鋼板の両側縁を溶接して連続する管を形成する溶接装置と、溶接ビードの切削および必要に応じてポストアニールやサイジングをする後処理装置とを備える曲げ加工製品の連続製造装置における後処理装置の出側に、配置すること、または
(b)ロールフォーミングラインを構成する、帯状鋼板を連続的に繰り出すアンコイラーと、繰り出された帯状鋼板を所定の断面形状に成形する成形機構とを備える曲げ加工製品の連続製造装置における成形機構の出側に配置すること
によって、曲げ加工製品を連続的に製造することができる。
本発明により製造される焼入れ鋼材は、例えば、以下に例示する用途(i)~(vii)に対して適用可能である。
(ii)自動車の各種レインフォース、ブレース等の補強部材、
(iii)バンパー、ドアインパクトビーム、サイドメンバー、サスペンションマウントメンバー、ピラー、サイドシル等の自動車の構造部材、
(iv)自転車や自動二輪車等のフレーム、クランク
(v)電車等の車輛の補強部材、台車部品(台車枠、各種梁等)
(vi)船体等のフレーム部品、補強部材、
(vii)家電製品の強度部材、補強部材または構造部材
なお、測定位置は、図4、5のグラフ中に併記した部位P1、P2である。部位P1は、横断面内において第1の絶縁部11bおよび第2の絶縁部12bに挟まれた領域の位置、すなわち比較例の誘導加熱コイル5ではコイル巻き数が実質的に一巻きとなる位置である。また部位P2は、部位P1から本体11の中心角で90度離れた位置である。図4、5のグラフにおける実線が部位Pの測定結果であり、破線が部位P2の測定結果である。
図5にグラフで示すように、比較例では鋼管1の周方向の温度差が約260℃であるのに対し、図4にグラフで示すように本発明例によれば鋼管1の周方向の温度差は約80℃に低減される。
Claims (3)
- 回転を伴わない長尺の金属材に対して相対的に移動しながら当該金属材を誘導加熱する加熱コイルにおいて、
非実効コイル長をLnとし、内周コイル長をL0とした場合に、Ln/L0が0.05以下であること
を特徴とする誘導加熱コイル。 - 請求項1に記載された誘導加熱コイルと、
前記誘導加熱コイルとともに前記金属材に対して相対的に移動しながら、前記誘導加熱コイルにより誘導加熱された前記金属材を冷却することによって、前記金属材の軸方向へ移動する高温部を前記金属材に形成する冷却機構と、
前記高温部に曲げモーメントを与える加工機構と
を備えることを特徴とする加工部材の製造装置。 - 請求項1に記載された誘導加熱コイルを、中心軸回りに回転しない長尺の金属材に対して相対的に該金属材の軸方向へ移動しながら当該金属材を誘導加熱するとともに、前記誘導加熱コイルとともに前記金属材に対して相対的に移動する冷却機構により、前記誘導加熱コイルにより誘導加熱された前記金属材を冷却することによって、前記金属材の軸方向へ移動する高温部を前記金属材に形成した後に、該高温部に曲げモーメントを与えることを特徴とする加工部材の製造方法。
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CA2786460A CA2786460C (en) | 2010-01-06 | 2011-01-06 | Induction heating coil, and an apparatus and method for manufacturing a worked member |
JP2011549018A JP5403071B2 (ja) | 2010-01-06 | 2011-01-06 | 誘導加熱コイル、加工部材の製造装置および製造方法 |
EA201290608A EA024314B1 (ru) | 2010-01-06 | 2011-01-06 | Катушка для индукционного нагрева, устройство и способ изготовления обработанной детали |
ES11731815.4T ES2597027T3 (es) | 2010-01-06 | 2011-01-06 | Bobina de calentamiento por inducción, dispositivo para fabricación de pieza de trabajo, y método de fabricación |
MX2012007911A MX339779B (es) | 2010-01-06 | 2011-01-06 | Bobina de calentamiento por induccion y aparato y metodo para la fabricacion de un miembro procesado. |
AU2011204165A AU2011204165B2 (en) | 2010-01-06 | 2011-01-06 | Induction heating coil, and an apparatus and method for manufacturing a worked member |
BR112012016758A BR112012016758B1 (pt) | 2010-01-06 | 2011-01-06 | bobina de aquecimento e aparelho de manufatura para um membro trabalhado |
EP11731815.4A EP2523530B1 (en) | 2010-01-06 | 2011-01-06 | Induction heating coil, device for manufacturing of workpiece, and manufacturing method |
KR1020127020189A KR101404386B1 (ko) | 2010-01-06 | 2011-01-06 | 유도 가열 코일, 가공 부재의 제조 장치 및 제조 방법 |
CN201180012755.8A CN102792771B (zh) | 2010-01-06 | 2011-01-06 | 感应加热线圈、加工构件的制造装置及制造方法 |
IN6264DEN2012 IN2012DN06264A (ja) | 2010-01-06 | 2011-01-06 | |
US13/542,883 US9604272B2 (en) | 2010-01-06 | 2012-07-06 | Induction heating coil, and an apparatus and method for manufacturing a worked member |
ZA2012/05734A ZA201205734B (en) | 2010-01-06 | 2012-07-30 | Induction heating coil,device for manufacturing of workpiece,and manufacturing method |
US15/140,527 US10406581B2 (en) | 2010-01-06 | 2016-04-28 | Method for manufacturing a worked member using an induction heating coil |
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US13/542,883 Continuation US9604272B2 (en) | 2010-01-06 | 2012-07-06 | Induction heating coil, and an apparatus and method for manufacturing a worked member |
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CN104220608A (zh) * | 2012-03-28 | 2014-12-17 | 丰田自动车株式会社 | 环形金属环的制造方法及制造装置以及环形金属环 |
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JP2022537727A (ja) * | 2019-06-28 | 2022-08-29 | ニコベンチャーズ トレーディング リミテッド | エアロゾル供給装置 |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104220608A (zh) * | 2012-03-28 | 2014-12-17 | 丰田自动车株式会社 | 环形金属环的制造方法及制造装置以及环形金属环 |
JP2019210509A (ja) * | 2018-06-04 | 2019-12-12 | 日本製鉄株式会社 | 3次元熱間曲げ焼入れ装置および焼入れ方法 |
JP6992680B2 (ja) | 2018-06-04 | 2022-01-13 | 日本製鉄株式会社 | 3次元熱間曲げ焼入れ装置および焼入れ方法 |
JP2020030998A (ja) * | 2018-08-23 | 2020-02-27 | 高周波熱錬株式会社 | 加熱コイル及び加熱方法 |
JP7086788B2 (ja) | 2018-08-23 | 2022-06-20 | 高周波熱錬株式会社 | 加熱コイル及び加熱方法 |
JP2022537727A (ja) * | 2019-06-28 | 2022-08-29 | ニコベンチャーズ トレーディング リミテッド | エアロゾル供給装置 |
JP7499791B2 (ja) | 2019-06-28 | 2024-06-14 | ニコベンチャーズ トレーディング リミテッド | エアロゾル供給装置 |
JP2023509835A (ja) * | 2020-03-30 | 2023-03-10 | 上海精智実業股▲ふん▼有限公司 | 焼入システムおよび焼入方法 |
JP7254248B2 (ja) | 2020-03-30 | 2023-04-07 | 上海精智実業股▲ふん▼有限公司 | 焼入システムおよび焼入方法 |
Also Published As
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KR20120099515A (ko) | 2012-09-10 |
EP2523530B1 (en) | 2016-07-13 |
ZA201205734B (en) | 2013-04-24 |
KR101404386B1 (ko) | 2014-06-09 |
MX339779B (es) | 2016-06-08 |
BR112012016758B1 (pt) | 2020-04-28 |
CN102792771B (zh) | 2016-02-10 |
CA2786460C (en) | 2016-08-09 |
BR112012016758A2 (pt) | 2016-08-23 |
CN102792771A (zh) | 2012-11-21 |
US20120325806A1 (en) | 2012-12-27 |
AU2011204165B2 (en) | 2013-10-24 |
IN2012DN06264A (ja) | 2015-09-25 |
US10406581B2 (en) | 2019-09-10 |
JPWO2011083817A1 (ja) | 2013-05-13 |
US20160279690A1 (en) | 2016-09-29 |
JP5403071B2 (ja) | 2014-01-29 |
EA201290608A1 (ru) | 2013-02-28 |
MX2012007911A (es) | 2012-09-07 |
CA2786460A1 (en) | 2011-07-14 |
US9604272B2 (en) | 2017-03-28 |
EP2523530A4 (en) | 2014-01-22 |
EA024314B1 (ru) | 2016-09-30 |
ES2597027T3 (es) | 2017-01-13 |
AU2011204165A1 (en) | 2012-08-02 |
EP2523530A1 (en) | 2012-11-14 |
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