WO2019044763A1 - Équipement de traitement thermique à haute fréquence - Google Patents

Équipement de traitement thermique à haute fréquence Download PDF

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Publication number
WO2019044763A1
WO2019044763A1 PCT/JP2018/031566 JP2018031566W WO2019044763A1 WO 2019044763 A1 WO2019044763 A1 WO 2019044763A1 JP 2018031566 W JP2018031566 W JP 2018031566W WO 2019044763 A1 WO2019044763 A1 WO 2019044763A1
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Prior art keywords
line
hardening
high frequency
heat treatment
power supply
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PCT/JP2018/031566
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English (en)
Japanese (ja)
Inventor
義也 真野
慎太郎 鈴木
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Ntn株式会社
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Publication of WO2019044763A1 publication Critical patent/WO2019044763A1/fr

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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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • 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
    • 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 high-frequency heat treatment equipment, and more particularly, a high-frequency heat treatment that can be preferably used when induction hardening is performed on steel members having a large number of model numbers, such as the outer joint member of a constant velocity universal joint. It relates to a heat treatment facility.
  • the mechanical strength etc. required for the outer joint member 100 are given.
  • Heat treatment quench hardening treatment
  • the outer joint member 100 does not have to have high mechanical strength in its entirety due to its function, and it is often the case that high mechanical strength is required.
  • a hardened layer H by heat treatment is formed on the inner diameter surface of the cup portion 101 including the track groove and the outer diameter surface of the shaft portion 102.
  • a heating coil is used to target the required quenching area of the work to a target temperature. It is common to adopt so-called induction hardening which cools the region requiring quenching of the work after induction heating.
  • the heating coil corresponds to the shape of the required quenching area of the work after changing the model number
  • the hardening conditions are changed.
  • a quenching sample subjected to induction hardening under a predetermined quenching condition is manufactured and cut, and the quenching is performed.
  • Quality inspection is performed such as measuring depth (hardened layer thickness), surface hardness, etc. and observing the metal structure of the hardened layer with a microscope. Then, after confirming that there is no problem in the shape and installation mode of the heating coil, and the quenching condition etc. by quality inspection, the high frequency heat treatment equipment is practically operated and induction hardening is performed on the workpiece after the model number change. Apply.
  • the time required for replacing the heating coil described above and changing the setting of the quenching conditions (setup time), and the time required for the preparation of a quenched sample and the destructive inspection as a quality inspection (inspection time) are all so-called In the case of a down time, taking the high-frequency heat treatment equipment used for performing induction hardening on the outer joint member 100 shown in FIG. 8 as an example, the down time occurring at the time of model number change may increase to about 120 minutes in total. (Setup time: about 30 minutes, examination time: about 90 minutes). Therefore, particularly as in the outer joint member 100 shown in FIG. 8, there is a problem that the high frequency heat treatment equipment used to apply induction hardening to a work having a large number of model numbers has a low operation rate.
  • Patent Document 1- 3 As a technical means for shortening the down time of the high frequency heat treatment equipment accompanying the model number change, there is a method of shortening the setup time by facilitating replacement of the heating coil and position adjustment (for example, Patent Document 1- 3).
  • Patent Document 4 a method of detecting a tissue change by ultrasonic waves
  • Patent Document 5 a method of measuring a quenching depth using eddy current
  • all the methods described in Patent Documents 4 and 5 are only methods capable of measuring and inspecting some quality characteristics, and whether or not the workpiece is appropriately subjected to induction hardening. It is not enough to judge. Therefore, it is the fact that the technical means described in Patent Documents 4 and 5 can not be adopted as an alternative means of the destructive inspection described above.
  • the present invention has an object to provide a high-frequency heat treatment facility which is compact, has a high facility operation rate, and is capable of appropriately performing induction hardening on a work.
  • the induction heating apparatus (1) invented to achieve the above object is: ⁇ One high frequency power supply (2), A first matching board (3) and a second matching board (4) for generating a resonant current in response to high frequency power output from the high frequency power supply (2); A power supply destination switch (5) for switching the supply destination of high frequency power output from the high frequency power supply (2) between the first matching board (3) and the second matching board (4); A first line (10) having a first hardening device (11) and a second hardening device (14), each capable of performing induction hardening on the required quenching area of the work; A second line (20) having a first hardening device (21) capable of performing induction hardening on a required quenching area of a work; A heating unit (12) provided in the first hardening device (11) of the first line (10), and a heating unit (22) provided in the first hardening device (21) of the second line (20) A first current supply destination switcher (6) for switching the supply destination of the resonance current generated in the first matching board (3)
  • the first line (10) can be obtained by appropriately switching the output destination of the control signal output from the control device (8) while the heat treatment facility (1) is in operation.
  • preparation and quality inspection of hardened sample of second work can be performed.
  • induction hardening for the first work in the first line when induction hardening for the first work in the first line is completed, it is possible to smoothly shift to induction hardening for the second work, so the operating rate of the entire heat treatment facility (1) is It can be enhanced.
  • the time required for the inspection does not directly correspond to the downtime of the heat treatment facility (1), so a drastic decrease in the facility operation rate due to the destructive inspection is suppressed. Alternatively, it can be prevented. Therefore, the destructive inspection as a quality inspection can be appropriately implemented. Therefore, in addition to appropriately performing induction hardening on a work, induction hardening can be efficiently performed on a plurality of types of works having different shapes (model numbers).
  • the high-frequency power supply (2) is shared by the heating units (12, 15, 22) provided in the respective quenching devices (11, 14, 21), and the first alignment board (3) is It is shared by the heating parts (12, 22) respectively provided in the first hardening device (11, 21) of the line (10) and the second line (20). Therefore, a compact and inexpensive heat treatment facility (1) is realized as compared to the case where high-frequency power supplies and matching boards are individually connected to the heating parts (12, 15, 22) of the respective quenching devices (11, 14, 21). It can also be done.
  • first line (10) and the second line (20) are accommodated in one frame (9), it is advantageous for realizing a compact high-frequency heat treatment facility (1).
  • the first hardening device of the second line (20) is provided without providing a separate partition or the like. In (21), it is possible to secure the safety when performing setup work such as coil replacement manually.
  • first alignment board (3) is disposed above the first hardening device (11) of the first line (10) and the first hardening device (21) of the second line (20), compact heat treatment is performed. It is advantageous to realize the equipment (1).
  • the second line (20) may further include a second hardening device (24) capable of performing induction hardening on the required quenching area of the work.
  • a second hardening device (24) capable of performing induction hardening on the required quenching area of the work.
  • the heating unit (15) provided in the second hardening device (14) of the first line (10) and the heating unit provided in the second hardening device (24) of the second line (20) (25) is electrically connected to the control device (8), and the destination of the resonance current generated in the second matching board (4) is switched between the two heating units (15, 25) It can be connected to the high frequency power supply (2) through the 2 current supply destination switch (7), and the second matching board (4) and the power supply destination switch (5). In this way, the high frequency power supply (2) is shared by the heating units (12, 15, 22, 25) provided in the respective quenching devices (11, 14, 21, 24), and the second matching is performed.
  • the board (4) is shared by the heating parts (15, 25) provided respectively in the second hardening device (14, 24) of the first line (10) and the second line (20), the whole as a whole It is possible to realize a heat treatment facility (1) which is compact but has high versatility.
  • the second alignment board (4) is disposed above the second hardening device (14) of the first line (10) and the second hardening device (24) of the second line (20), at least four units are provided. It is advantageous in achieving the compactification of the heat treatment equipment (1) equipped with the quenching device of the present invention.
  • a transfer robot (50) for transferring the work in the high-frequency heat treatment facility (1) is disposed between the first line (10) and the second line (20), a simple and compact heat treatment facility can be realized. Can.
  • the heat treatment equipment according to the present invention Since the heat treatment equipment according to the present invention has the above-mentioned features, it has a large number of model numbers, and members that are frequently changed in model number, for example, an outer joint member of a constant velocity universal joint is induction hardened. It can be suitably used as a heat treatment facility for applying. Further, the heat treatment facility according to the present invention comprises a hub ring of a wheel bearing device having a flange portion for wheel attachment and an inner raceway surface, and an outer ring of a wheel bearing device having an outer raceway surface facing the inner raceway surface. It can also be suitably used as a heat treatment facility for performing induction hardening on the above groups.
  • FIG. 1st hardening apparatus It is a perspective view of high-frequency heat treatment equipment concerning a 1st embodiment of the present invention. It is a top view of the induction hardening apparatus installation shown in FIG. It is a figure which shows notionally the apparatus structure of the 1st hardening apparatus of a 1st line. It is a figure which shows notionally the apparatus structure of the 2nd hardening apparatus of a 1st line. It is a figure which shows notionally the apparatus structure of the 1st hardening apparatus of a 2nd line. It is a figure which shows notionally the apparatus structure of the 2nd hardening apparatus of a 2nd line. It is a block diagram which shows the heating system of the high frequency heat-treatment installation shown in FIG.
  • FIG. 1 is a perspective view of the high-frequency heat treatment equipment 1 according to the first embodiment of the present invention
  • FIG. 2 is a top view of the heat treatment equipment 1.
  • the high-frequency heat treatment facility 1 shown in FIGS. 1 and 2 has a first line 10 having a first hardening device 11 and a second hardening device 14 each capable of performing induction hardening on a work (first work W1).
  • a second hardening device 21 and a second hardening device 24 each capable of performing induction hardening on a workpiece (in particular, a second workpiece W2 different in shape and model number from the first workpiece W1)
  • a line 20 a carry-in device 30 for carrying the work into the heat treatment equipment 1, a carry-out device 40 for carrying the work after quenching completion out of the heat treatment equipment 1, and disposed between the first line 10 and the second line 20
  • a transfer robot 50 as an internal transfer device.
  • the first line 10, the second line 20, and the transfer robot 50 are housed and arranged inside a frame (housing) 9 having a rounded rectangular shape in a plan view.
  • the loading device 30 of the illustrated example is a conveyer having two rows of convey paths.
  • one of the two rows of transport paths is used to transport the first workpiece W1, and the other is used to transport the second workpiece W2.
  • the unloading device 40 is a transport conveyor having two rows of transport paths.
  • the transfer robot 50 as the internal transfer device, a transfer robot having an extendable, retractable, swingable, and rotatable (pivotal) arm is adopted.
  • the work to be heat-treated both the first work W1 and the second work W2 to be introduced into the heat treatment facility 1 is outside the constant velocity universal joint integrally having the cup portion 101 and the shaft portion 102 shown in FIG.
  • the specific configuration of the heat treatment equipment 1 of the present embodiment will be described by taking the case of the joint member (base material) 100 as an example.
  • the first hardening device 11 provided in the first line 10 performs the induction hardening on the inner diameter surface of the cup portion 101 of the outer joint member 100 as the first work W 1, and the inner diameter side surface layer of the cup portion 101
  • the hardened layer H is formed in the portion, and the second hardening device 14 forms the hardened layer H in the outer diameter side surface layer portion of the shaft portion 102 by performing induction hardening on the outer diameter surface of the shaft portion 102.
  • the first work W 1 that has reached the end position (downstream end) of the loading device 30 is transported by the transport robot 50 in the order of the first hardening device 11 ⁇ the second hardening device 14 ⁇ the unloading device 40.
  • a temperature is aimed at a necessary quenching area of the first work W1 (here, the inner diameter surface of the cup portion 101) in a cylindrical housing.
  • the heating part 12 having a heating coil for induction heating and the cooling part can be jetted toward the required quenching region of the first work W1 which is disposed on the lower side of the heating part 12 and heated by the heating part 12 What provided the cooling part 13 which has a cooling jacket, and the raising / lowering mechanism outside the illustration which raises / lowers and moves in the state holding the 1st workpiece
  • the elevating mechanism moves up and down, the required quenching area of the first workpiece W1 is arranged in the order of the facing area of the heating unit 12 (heating coil) ⁇ the facing area of the cooling unit 13 (cooling jacket).
  • the required quenching area of the first work W 1 (here, the shaft portion A heating area 15 having a heating coil for induction heating to a temperature aimed at an outer diameter surface of 102, and a quenching area of the first work W1 disposed on the lower side of the heating area 15 and heated by the heating area 15
  • a cooling unit 16 having a cooling jacket capable of injecting a coolant and a lifting mechanism (not shown) moving up and down while holding the first workpiece W1 are employed.
  • the required quenching area of the first workpiece W1 is arranged in the order of the facing area of the heating unit 15 (heating coil) ⁇ the facing area of the cooling unit 16 (cooling jacket).
  • the heating coil provided in the heating unit 15 and the cooling jacket provided in the cooling unit 16 respectively heat the first hardening device 11 so that the outside diameter surface of the shaft 102 can be induction heated and cooled.
  • the heating coil and the cooling jacket provided in the portion 12 and the cooling portion 13 respectively have different shapes.
  • the first line 10 mainly has the above configuration, and performs induction hardening on the cup portion 101 and the shaft portion 102 of the outer joint member 100 as the first work W1 in the mode described below.
  • the raising and lowering mechanism is driven again to arrange the inner diameter surface of the cup portion 101 in the opposing region of the cooling portion 13 (cooling jacket)
  • the liquid cools the inner diameter surface of the cup portion 101.
  • the transport robot 50 transports the first workpiece W1 to the workpiece delivery position 14a provided in the second hardening device 14.
  • the second hardening device 14 in the heating unit 15 and the cooling unit 16, the same processes as the heating unit 12 and the cooling unit 13 of the first hardening device 11 are performed.
  • the first work W1 in which the hardened layer H is formed on the outer diameter side surface layer portion of the shaft portion 102 is obtained.
  • the hardened first workpiece W1 in which the hardened layer H is formed on each of the inner diameter surface layer portion of the cup portion 101 and the outer diameter side surface layer portion of the shaft portion 102 2) The work is transferred from the work transfer position 14 a of the hardening device 14 to the unloading device 40 and is unloaded out of the heat treatment facility 1.
  • the first hardening device 21 provided in the second line 20 is an outer joint member as the second work W2 (in detail, the shape etc. of the outer joint member 100 as the first work W1 (model number)
  • the hardened layer H is formed on the inner surface side surface layer portion of the cup portion 101 by performing induction hardening on the inner diameter surface of the cup portion 101 among the outer joint members 100 having different
  • the hardened layer H is formed on the outer surface side surface portion of the shaft portion 102.
  • the second workpiece W 2 that has reached the downstream end of the loading device 30 is transported by the transport robot 50 in the order of the first hardening device 21 ⁇ the second hardening device 24 ⁇ the unloading device 40.
  • the heating coil provided in the heating unit 22 and the cooling jacket provided in the cooling unit 23 each have a shape corresponding to the inner diameter surface of the cup portion 101 of the second work W2.
  • a heating unit 25 having a heating coil in a cylindrical housing is provided as the second hardening device 24, as in the second hardening device 14 of the first line 10.
  • a heating unit 25 having a heating coil in a cylindrical housing is provided.
  • a cooling unit having a cooling jacket and a lifting mechanism are adopted.
  • the heating coil provided in the heating unit 25 and the cooling jacket provided in the cooling unit 26 each have a shape corresponding to the outer diameter surface of the shaft portion 102 of the second workpiece W2.
  • the second line 20 performs induction hardening on the cup portion 101 and the shaft portion 102 of the outer joint member 100 as the second work W 2 in the same procedure as the first line 10.
  • the heat treatment equipment 1 of the present embodiment is characterized mainly in the heating system of the work including the heating units 12, 15, 22, 25 described above. If it demonstrates with reference to FIG. 4, the heating part 12 provided in the 1st hardening apparatus 11 of the 1st line 10 and the heating part 22 provided in the 1st hardening apparatus 21 of the 2nd line 20 are respectively The high frequency power supply 2 is electrically connected via the first current supply destination switch 6, the first matching board 3 and the power supply destination switch 5. Further, the heating unit 15 provided in the second hardening device 14 of the first line 10 and the heating unit 25 provided in the second hardening device 24 of the second line 20 respectively switch the second current supply destination.
  • the heating units 12, 15, 22, 25 provided in the heat treatment facility 1 share one high frequency power supply 2.
  • the heating units 12 and 22 share the first alignment board 3, and the heating units 15 and 25 share the second alignment board 4.
  • cooling units 13 and 16 provided in both hardening devices 11 and 14 in the first line 10 and lifting and lowering mechanisms, and hardening devices 21 and 24 in the second line 20, respectively.
  • the cooling units 23 and 26 and the elevating mechanism provided are operated by receiving power supplied from an AC power supply (not shown).
  • each of the first matching board 3 and the second matching board 4 is provided with a resonant circuit that receives high frequency power output from the high frequency power supply 2 and generates a resonant current.
  • the resonant circuit for example, one configured by a plurality of capacitors and a transformer is used.
  • the first alignment board 3 straddles the first hardening device 11 of the first line 10 and the first hardening device 21 of the second line 20 so as to cover both hardening devices. It is disposed on the upper side of 11 and 21 and held by the ceiling of the frame 9.
  • the second alignment board 4 is disposed above the hardening devices 14 and 24 so as to straddle the second hardening device 14 of the first line 10 and the second hardening device 24 of the second line 20. And is held on the ceiling of the frame 9.
  • the power supply destination switch 5 is provided on an electric wire electrically connecting both the matching boards 3 and 4 and the high frequency power source 2, and the high frequency power output from the high frequency power source 2 The supply destination is switched between the first alignment board 3 and the second alignment board 4.
  • the first current supply destination switching device 6 includes the first matching board 3 and the heating portion 12 provided in the first hardening device 11 of the first line 10 and the first of the second line 20.
  • the first line 10 is provided on an electric wire electrically connecting the heating unit 22 provided in the hardening device 21, and a supply destination of the resonance current generated in (the resonance circuit of) the first matching board 3. Switching between (the heating coil of) the heating unit 12 and the (heating coil) of the heating unit 22 of the second line 20.
  • the first current supply destination switch 6 is disposed between the first hardening device 11 of the first line 10 and the first hardening device 21 of the second line 20.
  • the internal space of the frame 9 as a partition separating the space in which the first hardening device 11 of the first line 10 is disposed and the space in which the first hardening device 21 of the second line 20 is disposed. Also works.
  • the second current supply destination switch 7 includes the second matching board 4 and the heating unit 15 and the second line 20 provided in the second hardening device 14 of the first line 10. It is provided on the electric wire electrically connecting the heating unit 25 provided in the second hardening device 24, and the supply destination of the resonance current generated in (the resonance circuit of) the second matching board 4 is the first Switching is performed between (the heating coil of) the heating portion 15 of the line 10 and (the heating coil of) the heating portion 25 of the second line 20.
  • the second current supply destination switch 7 is disposed between the second hardening device 14 of the first line 10 and the second hardening device 24 of the second line 20. Of the internal space of the frame 9 and a partition that separates the space in which the second hardening device 14 of the first line 10 is disposed and the space in which the second hardening device 24 of the second line 20 is disposed. It also works as
  • the heat treatment facility 1 further includes a control device 8.
  • the control device 8 includes a high frequency power source 2, a first matching board 3, a second matching board 4, a power supply destination switch 5, and The first current supply destination switch 6, the second current supply destination switch 7 and the transfer robot 50 are electrically connected.
  • the control device 8 stores data on heating (quenching) conditions for each model number of the workpiece to be quenched, and when operating the heat treatment facility 1 (the first line 10 and the second line 20) When the operator operates the control panel (not shown) to select the model number of the workpiece to be heat-treated, the control signal related to the quenching condition according to the model number of the workpiece is the high frequency power supply 2 from the controller 8 and the first matching panel 3 and the second alignment board 4 (see dashed arrow in FIG. 4).
  • the high frequency power supply 2 outputs a predetermined amount of high frequency power for a predetermined time based on the control signal output from the control device 8, and the matching boards 3 and 4 use the control signal output from the control device 8, for example
  • the number of capacitors electrically connected to the transformer is increased or decreased to generate a predetermined amount of resonance current.
  • the control device 8 supplies the high-frequency power output from the high-frequency power supply 2 and the resonance current generated in the first matching board 3 as indicated by the broken arrow in FIG.
  • the control signals relating to the supply destinations of the resonance current generated in the first and second matching boards 4 are sent to the power supply destination switch 5, the first current supply destination switch 6, and the second current supply destination switch 7, respectively. Output at a predetermined timing.
  • a program related to the operation mode of the transfer robot 50 is stored in the control device 8, and the transfer robot 50 operates based on a control signal (see a broken arrow in FIG. 4) output from the control device 8.
  • First line 10 is operated, and induction hardening is sequentially performed on the outer joint member 100 as the first workpiece W1 sequentially conveyed by the loading device 30.
  • the control device 8 performs the following for each of the first matching board 3, the second matching board 4, the first current supply destination switch 6, the second current supply destination switch 7, and the transfer robot 50.
  • Output a control signal such as First alignment board 3: A control signal according to the hardening condition of the cup portion 101 of the first work W1.
  • Second alignment board 4 A control signal according to the hardening condition of the shaft portion 102 of the first work W1.
  • First current supply destination switching device 6 electrically connect the first matching board 3 and the heating unit 12 of the first hardening device 11 (the destination of the resonance current generated in the first matching board 3 is the heating unit 12) Control signal.
  • Second current supply destination switch 7 electrically connects the second matching board 4 and the heating unit 15 of the second hardening device 14 (the supply destination of the resonance current generated in the second matching board 4 is the heating unit 15) Control signal.
  • Transport robot 50 downstream end of loading device 30 ⁇ work delivery position 11a of first hardening device 11 (see FIG. 2) ⁇ work delivery position 14a of second hardening device 14 (see FIG. 2) ⁇ unloading device 40 Control signal that makes the upstream end one cycle operation.
  • the control device 8 adjusts the timing of the first work W1 to be input to the first hardening device 11 and applies the first work W1 to the high frequency power source 2 and the power supply destination switch 5 respectively.
  • a control signal according to the hardening condition of the cup portion 101 and a control signal for electrically connecting the high frequency power supply 2 and (the resonance circuit of) the first matching board 3 are output, and the first work W1 is a second baking.
  • Control signals according to the hardening conditions of the shaft portion 102 of the first work W 1 to the high frequency power supply 2 and the power supply destination switch 5 in accordance with the timing of being supplied to the insertion device 14, and the high frequency power supply 2 And the second matching board 4 (the resonant circuit thereof) are electrically connected.
  • the high frequency power supply 2 and the two heating units 22 and 25 provided on the second line 20 are electrically In the second line 20, a heating coil corresponding to the shape of the required area of the outer joint member 100 as the second work W2 is set in the heating portion 22, 25 or the like. Carry out work.
  • first hardening device 11 of the first line 10 and the first hardening device 21 of the second line 20 and the second hardening device 14 of the first line 10 and the second line 20. Because the first current supply destination switching device 6 and the second current supply destination switching device 7 functioning as partition walls are disposed between the second hardening device 24 and the second hardening device 24 respectively, The safety of the workers who carry out the work is secured to some extent.
  • the first work W 1 which has been hardened is carried out by the transfer robot 50 so as to pass between the first hardening device 21 and the second hardening device 24 which constitute the second line 20, so that the unloading device 40 is carried out.
  • the operator in the setup work contacts (collision) with the transfer robot 50, and the high temperature coolant adhering to the first work W1 for which the quenching is completed is sent to the worker in the setup work.
  • a situation such as scattering may occur. Therefore, in the heat treatment equipment 1 of the present embodiment, movable partition walls 60 between the first hardening device 11, 21 and the transfer robot 50 and between the second hardening device 21, 24 and the transfer robot 50. are provided respectively.
  • Second alignment board 4 A control signal according to the hardening condition of the shaft portion 102 of the second workpiece W2.
  • First current supply destination switching device 6 electrically connect the first matching board 3 and the heating unit 22 of the first hardening device 21 (the supply destination of the resonance current generated in the first matching board 3 is the heating unit 22) control signal.
  • Second current supply destination switch 7 electrically connects the second matching board 4 and the heating unit 25 of the second hardening device 24 (the supply destination of the resonance current generated in the second matching board 4 is the heating unit 25) control signal.
  • Transport robot 50 downstream end of loading device 30 ⁇ work delivery position 21a of first hardening device 21 (see FIG. 2) ⁇ work delivery position 24a of second hardening device 24 (see FIG. 2) ⁇ unloading device 40 Control signal that makes the upstream end one cycle operation.
  • control device 8 controls the second work W2 for each of the high frequency power supply 2 and the power supply destination switch 5 in accordance with the timing when the second work W2 is put into the first hardening device 21. And a control signal for electrically connecting the high-frequency power supply 2 to the first matching board 3 and a second work W2 to the second hardening device 24.
  • the control signal according to the hardening condition of the shaft portion 102 of the second work W2 and the second matching with the high frequency power supply 2 for each of the high frequency power supply 2 and the power supply destination switch 5 in accordance with the timing of turning on.
  • a control signal for electrically connecting the board 4 is output.
  • Step 5 Hardening the second workpiece and setup work for the next model number
  • induction hardening for the second workpiece W2 is started, in the first line 10, removal work of heating coils attached to the heating parts 12 and 15 of both hardening devices 11 and 14 and the heat treatment equipment 1 concerned
  • a stage of the next model number including an operation of attaching a heating coil corresponding to the shape of a work (for example, the outer joint member 100 having a shape and model number different from that of the second work W2) to be introduced next Removal work is carried out.
  • the first step to the fifth step described above are sequentially performed to complete the hardening of the second workpiece W2. Then, using the first line 10, the high frequency power is applied to the outer joint member 100 of the next model number. Harden.
  • the first line 10 and the second line 20 can be appropriately switched by appropriately switching the output destination of the control signal from the control device 8 while the heat treatment facility 1 is in operation.
  • a workpiece whose shape is different from that of the workpiece being quenched in the other line while induction hardening is performed on the workpiece in any one of the lines It is possible to perform so-called setup work including installation of heating coils for induction hardening on workpieces and setting of quenching conditions, and further, preparation and quality inspection of quenched samples of workpieces of the next model number .
  • induction hardening for the workpiece in one of the lines is completed, transition to induction hardening for the workpiece of the next model number can be made smoothly, so the facility operation rate of the entire heat treatment equipment 1 can be increased.
  • the high frequency power source 2 is provided to the heating units 12 and 15 provided in both hardening devices 11 and 14 of the first line 10 and the heating units 22 provided to both hardening devices 21 and 24 in the second line 20,
  • the heating section 12 is shared by the first aligning plate 3 and provided in the first hardening device 11 of the first line 10, and the heating part provided in the first hardening device 21 of the second line 20.
  • the second alignment board 4 is provided in the heating unit 15 provided in the second hardening device 14 of the first line 10 and in the second hardening device 24 of the second line 20. It is shared with the heating unit 25. Therefore, compared with the case where a high frequency power supply and a matching board are individually connected to the heating part of each of the hardening devices 11, 12, 21 and 22, the compact and inexpensive heat treatment equipment 1 can be realized.
  • the heat treatment facility 1 of the present embodiment accommodates the first line 10 and the second line 20 in one frame 9, and the inside disposed between the first line 10 and the second line 20.
  • a further compact heat treatment facility 1 can be realized by carrying the work introduced into each of the first line 10 and the second line 20 by the transfer robot 50 as the transfer device.
  • the installation 1 can be preferably used also when performing induction hardening on other works.
  • FIG. 5 shows a top view of the high-frequency heat treatment equipment 1 according to the second embodiment of the present invention.
  • this embodiment is a specific example in the case where the work to be quenched is changed to a work consisting of a set of a hub ring of the wheel bearing device and an outer ring of the wheel bearing device.
  • the entire configuration is substantially the same as the heat treatment equipment 1 shown in FIGS. 1 and 2. That is, the work (first work W11) according to the present embodiment is a set of one outer ring W11a and one hub ring W11b, and the outer ring W11a and the hub ring W11b form a pair in the heat treatment equipment 1 It is carried in.
  • the wheel bearing device 200 includes a hub wheel 201, an outer ring 202 and an inner member 203 each having a cylindrical shape, a plurality of rolling elements (balls) 204 arranged in two rows, and a ball. And a holder 205 for holding 204.
  • the hub wheel 201 has a flange portion 201a for wheel attachment and an inner raceway surface 201b on which balls 204 of one row of the balls 204 arranged in two rows roll and includes the inner raceway surface 201b.
  • a hardened layer H (shown by cross hatching in FIG. 6) is formed on the outer diameter side surface layer portion.
  • the outer ring 202 has an outer raceway surface 202a facing the inner raceway surface 201b of the hub wheel 201 (and the inner raceway surface provided on the outer diameter surface of the inward member 203), and includes an inner raceway surface 202a.
  • a hardened layer H is formed on the side surface layer portion. The high-frequency heat treatment equipment 1 shown in FIG. 5 is used to form the hardened layer H on the hub wheel W11b and the outer ring W11a corresponding to the hub ring 201 and the outer ring 202 shown in FIG.
  • the outer ring W11a that has reached the downstream end of the loading device 30 is transported by the transport robot 50 in the order of (the work delivery position 11a of the first hardening device 11 of the first line 10) ⁇ the unloading device 40.
  • the induction hardening is performed on the inner diameter surface (outer raceway surface) of the outer ring W11a loaded into the first hardening device 11.
  • the hub wheel W11b that has reached the downstream end of the loading device 30 is transported by the transport robot 50 in the order of (the work delivery position 14a of the second hardening device 14 of the first line 10) ⁇ the unloading device 40, Induction hardening is performed on the outer diameter surface of the hub wheel W11b inserted into the insertion device 14.
  • control from the control device 8 to each of the high frequency power supply 2, the first matching board 3, the second matching board 4, the first current supply destination switch 6, the second current supply destination switch 7 and the transfer robot 50 The output aspect of the signal is basically the same as the output aspect of the control signal in the first step described above.
  • the outer ring W11a that has reached the downstream end of the loading device 30 is transferred to the workpiece delivery position 11a of the first hardening device 11 ⁇ at the downstream end of the loading device 30
  • Transport the hub wheel W11b that has reached to the work delivery position 14a of the second hardening device 14 ⁇ transport the hardened outer ring W11a returned to the work delivery position 11a of the first hardening device 11 to the unloading device 40 ⁇ the first 2
  • Step work required for induction hardening of the next model number (the second work consisting of an outer ring different in shape and model number from the outer ring W11a and a hub wheel different in shape and model number from the hub wheel W11b) carry out. Thereafter, the above-described second to fifth steps are sequentially performed. In this way, induction hardening can be performed efficiently and accurately on a plurality of types of workpieces each consisting of a set of one outer ring and one hub ring.
  • the second line 20 is one hardening device (first hardening It is also possible to comprise only the device 21).
  • the block diagram of the heating system of high frequency heat-treatment installation 1 ' which comprised 2nd line 20 only by one hardening apparatus (1st hardening apparatus 21) is shown in FIG.
  • the second hardening device 24 provided in the second line 20 of the heat treatment equipment 1 shown in FIGS. 1, 2 and 5 is omitted. Therefore, in the heating system of the heat treatment facility 1 ′, the second current supply destination switch 7 provided in the heating system of the heat treatment facility 1 is omitted.
  • the high frequency power source 2 is provided by the heating units 12 and 15 provided in both hardening devices 11 and 14 in the first line 10 and the heating unit 22 provided in the first hardening device 21 in the second line 20.
  • the heating unit 12 shared by the first alignment board 3 is provided in the first hardening device 11 of the first line 10, and the heating unit 22 provided in the first hardening device 21 of the second line 20. Shared. Therefore, it becomes compact and cheap heat treatment equipment 1 '.
  • each of the quenching devices 11, 14, 21, 24 performs so-called non-oxidative burning which performs induction hardening on a work in a non-oxidizing gas atmosphere. It is also possible to use an insertion device. In this way, it is possible to prevent, as much as possible, the generation of an oxide scale that degrades the appearance quality of the workpiece on the workpiece surface, and therefore, it is possible to obtain a high quality quenched and finished workpiece.
  • the high-frequency heat treatment equipment 1 according to the present invention is used when performing high-frequency hardening on the outer joint member of a constant velocity universal joint or a combination of a hub ring and an outer ring.
  • the high-frequency heat treatment equipment 1 according to the invention is also preferable when performing high-frequency hardening on other work (for example, slide bearing, inner joint member of constant velocity universal joint, bearing ring of rolling bearing, etc.) having many model numbers. It can apply.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electromagnetism (AREA)
  • Heat Treatment Of Articles (AREA)
  • General Induction Heating (AREA)

Abstract

La présente invention comprend une source d'alimentation à haute fréquence (2), une première plaque de réglage (3), une seconde plaque de réglage (4), un commutateur de destination d'alimentation électrique (5), une première ligne (10) ayant des premier et second dispositifs de trempe (11, 14), et une seconde ligne ayant un premier dispositif de trempe (21). Des unités de chauffage (12, 22), qui équipent respectivement les premiers dispositifs de trempe (11, 2), des deux lignes (10, 20), sont connectées électriquement à la source d'alimentation haute fréquence par l'intermédiaire d'un premier commutateur de destination d'alimentation en courant (6), de la première plaque de réglage (3) et du commutateur de destination d'alimentation électrique (5), qui commutent la destination d'alimentation d'un courant de résonance généré par la première plaque de réglage 3 entre les unités de chauffage (12, 22). Une unité de chauffage (15), qui équipe le second dispositif de trempe (14) de la première ligne (10), est connectée électriquement à la source d'alimentation haute fréquence par l'intermédiaire de la seconde plaque de réglage (4) et du commutateur de destination d'alimentation (5). Chacun(e) de la source d'alimentation haute fréquence (2), de la première plaque de réglage (3), de la seconde plaque de réglage (4), du commutateur de destination d'alimentation électrique (5) et du premier commutateur de destination d'alimentation en courant (6) est connecté(e) électriquement à un dispositif de commande (8) qui délivre des signaux de commande.
PCT/JP2018/031566 2017-08-28 2018-08-27 Équipement de traitement thermique à haute fréquence WO2019044763A1 (fr)

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JP2017-163349 2017-08-28
JP2017163349A JP6832812B2 (ja) 2017-08-28 2017-08-28 高周波熱処理設備

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1121620A (ja) * 1997-07-01 1999-01-26 High Frequency Heattreat Co Ltd 誘導加熱による自動焼入装置
JP2001226717A (ja) * 2000-02-10 2001-08-21 Fuji Electronics Industry Co Ltd 高周波焼入装置
JP2004169133A (ja) * 2002-11-20 2004-06-17 Fuji Electronics Industry Co Ltd 等速ジョイント用高周波焼入装置
EP2957530A1 (fr) * 2014-06-17 2015-12-23 Saet S.p.A. Appareil de chauffage par induction de composants mécaniques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1121620A (ja) * 1997-07-01 1999-01-26 High Frequency Heattreat Co Ltd 誘導加熱による自動焼入装置
JP2001226717A (ja) * 2000-02-10 2001-08-21 Fuji Electronics Industry Co Ltd 高周波焼入装置
JP2004169133A (ja) * 2002-11-20 2004-06-17 Fuji Electronics Industry Co Ltd 等速ジョイント用高周波焼入装置
EP2957530A1 (fr) * 2014-06-17 2015-12-23 Saet S.p.A. Appareil de chauffage par induction de composants mécaniques

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JP6832812B2 (ja) 2021-02-24

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