JP2019203184A - Heat treatment device - Google Patents

Abstract

To achieve at least one of: capable of enhancing performance for a heat treatment of an article to be treated, reducing manufacturing cost of a heat treatment device by achieving simple configuration of the heat treatment device, and shortening time needed for the heat treatment.SOLUTION: A heat treatment device 1 has a heating member 4 for heating a metal-made article to be treated 100 for a heat treatment, an upper cooling nozzle 11 including an injection port 11a arranged in a heat treatment chamber 2 in which the heating member 4 is arranged, and injecting a cooling gas to the article to be treated 100 for the heat treatment, and a positioning part 7 adjusting relative position of the upper cooling nozzle 11 and the article to be treated 100 during cooling the article to be treated 100.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat treatment apparatus for performing heat treatment and cooling treatment on an object to be processed.

  2. Description of the Related Art Heat treatment apparatuses for performing heat treatment on metal parts (objects to be processed) such as gears are known (for example, see Patent Documents 1 and 2). The heat treatment apparatus described in Patent Documents 1 and 2 is used for performing a quenching process or the like on an object to be processed. This heat treatment apparatus has a heating chamber and a cooling chamber. In the heating chamber, the object to be processed is heated. In the cooling chamber, the workpiece is cooled. The workpiece is transported from the heating chamber to the cooling chamber by the transport mechanism.

International Publication WO2017 / 043137 International Publication WO2017 / 043138

  In a heat treatment apparatus for quenching a metal part, when variations occur in the degree of cooling of each part of the workpiece, distortion (that is, unintended deformation) occurs in the metal part. For this reason, it is preferable to make the cooling degree of each part of a to-be-processed object more uniform. However, in the configurations described in Patent Documents 1 and 2, the heating chamber and the cooling chamber are provided separately. For this reason, when the workpiece is a small part, the quenching timing of each part of the metal part due to the temperature drop of the workpiece when the workpiece is transferred from the heating chamber to the cooling chamber Deviation occurs. As a result, it is difficult to uniformly cool each part of the product to be processed.

  In order to equalize the degree of cooling of each part of the object to be processed, that is, to suppress the distortion of the object to be processed and to improve the heat treatment quality, by a transfer mechanism for transferring the object to be processed from the heating chamber to the cooling chamber. It is also conceivable to increase the conveying speed of the workpiece. However, in order to increase the conveyance speed, it is necessary to improve the capability of the conveyance mechanism, which greatly increases the manufacturing cost of the heat treatment apparatus.

  In addition, if a liquid such as water or oil or a salt is used as a refrigerant during the cooling process in the cooling chamber, a post-cleaning step after the cooling process is required. For this reason, a cleaning device is required separately from the heat treatment device, and the equipment and time required for the heat treatment are increased. Furthermore, the refrigerant gives a load to the global environment.

  In view of the above circumstances, an example of an object of the present invention is to provide a heat treatment apparatus capable of further enhancing the performance of heat treating an object to be processed.

  In addition, an example of the object of the present invention is to lower the manufacturing cost of the heat treatment apparatus by realizing a simple configuration with respect to the heat treatment apparatus.

  Another object of the present invention is to provide a heat treatment apparatus that can shorten the time required for heat treatment.

  (1) In order to solve the above-described problems, a heat treatment apparatus according to an aspect of the present invention is provided in a heat treatment chamber in which a metal workpiece is heated for heat treatment and in the heat treatment chamber in which the heating member is disposed. A cooling nozzle including a jetted nozzle, wherein the cooling nozzle jets a cooling gas to the workpiece for the heat treatment, and the jet nozzle and the workpiece to be treated at the time of cooling the workpiece. A position adjusting unit that adjusts the position.

  According to this configuration, the heating member and the nozzle of the cooling nozzle are arranged in the same heat treatment chamber. Thereby, the cooling process of the to-be-processed object by a cooling nozzle can be started more rapidly after the heating of the to-be-processed object by a heating member is completed. As a result, the unintended temperature decrease amount of the object to be processed during the period from the completion of the heating process to the start of the cooling process can be further reduced. Thereby, the temperature of each part of the said to-be-processed object at the time of the start of cooling of a to-be-processed object can be made more equal. Therefore, the distortion of the workpiece can be more reliably reduced through the reduction in the variation in the cooling degree of the workpiece, that is, the uniformity of the quenching temperature. Furthermore, since the position adjusting unit is provided, the distance between the ejection port and the object to be processed when the object to be processed is cooled can be further shortened. Thereby, since a cooling gas can be injected with a stronger jet from a cooling nozzle toward a processed material, a processed material can be cooled more rapidly. As a result, in the heat treatment apparatus, the performance of heat treating the workpiece can be further increased. Further, in the heat treatment apparatus, the heating member and the nozzle of the cooling nozzle are not arranged in separate rooms. For this reason, the heat treatment apparatus can be made more compact, and the manufacturing cost of the heat treatment apparatus can be reduced through simplification of the structure of the heat treatment apparatus. Further, there is no need for a device that transports the object to be processed from a separately provided heating chamber to a cooling chamber. In addition, since a gas, which is a gas, is used for cooling the object to be processed, the object to be processed does not need to be subjected to a large cleaning process after the cooling process using the cooling nozzle. Furthermore, unlike the case where the object to be processed is cooled using a coolant such as water or oil, the heat treatment chamber can be prevented from being contaminated with the refrigerant, so that the heating member and the nozzle of the cooling nozzle are placed in the same heat treatment chamber. Can be placed. Furthermore, unlike the case of cooling an object to be processed using a coolant such as water or oil, the degree of the load exerted on the global environment by the coolant can be remarkably reduced, and a cleaning device for the cleaning process after the cooling process is unnecessary. Yes, the manufacturing cost and operating cost of the heat treatment apparatus can be reduced. In addition, since the cleaning step after the cooling step is not required, the time required for the heat treatment can be further shortened.

  (2) The heat treatment apparatus may further include a holding member for holding the object to be processed, and a mounting jig for placing the object to be processed may be provided as the holding member.

  According to this configuration, the object to be processed during the heat treatment can be maintained in a stable posture by the mounting jig.

  (3) The holding member may be provided with a pressing jig for suppressing displacement of the workpiece when the heat treatment is performed.

  According to this configuration, the displacement of the object to be processed can be more reliably suppressed when the cooling gas is being injected from the cooling nozzle to the object to be processed.

  (4) The position adjustment unit may include a holding member displacement mechanism that displaces the predetermined holding member with respect to the ejection port.

  According to this configuration, the relative position between the ejection port of the cooling nozzle and the object to be processed can be adjusted with a simple configuration in which the holding member is displaced with respect to the ejection port.

  (5) As the cooling nozzle, an upper cooling nozzle for injecting the cooling gas from above the object to be processed, a lower cooling nozzle for injecting the cooling gas from below the object to be processed, and the object to be processed in the horizontal direction There may be provided at least one side cooling nozzle that injects the cooling gas from the side of the object.

  According to this structure, more cooling gas can be supplied toward the location which faces the circumference | surroundings of the injection opening of a cooling nozzle among to-be-processed objects. Thereby, injection of the appropriate cooling gas according to the shape of the workpiece can be realized.

  (6) A proximity cooling nozzle is provided as the cooling nozzle, and when the workpiece is cooled, the distance between the ejection port of the proximity cooling nozzle and the workpiece is the heating member and the workpiece. The proximity cooling nozzle may be arranged so as to be shorter than the distance to

  According to this configuration, since a stronger jet is applied from the injection port of the proximity cooling nozzle toward the workpiece, the workpiece can be cooled more quickly and evenly.

  (7) The position adjusting unit may include a cooling nozzle displacement mechanism that displaces the ejection port with respect to the object to be processed.

  According to this configuration, the relative position between the cooling nozzle injection port and the object to be processed during cooling of the object to be processed can be adjusted with a simple structure in which the injection port of the cooling nozzle is displaced with respect to the object to be processed.

  (8) The position adjustment unit may include a control unit that controls a relative position between the ejection port and the workpiece.

  According to this configuration, the relative position between the ejection port of the cooling nozzle and the object to be processed can be controlled by the control unit in accordance with characteristics such as the shape of the object to be processed. Thereby, the relative position of the injection port of the cooling nozzle and the object to be processed can be more appropriately set by the control by the control unit for various objects to be processed having different shapes. As a result, the versatility of the heat treatment apparatus can be increased, and the application of the heat treatment apparatus can be broadened without changing specifications.

  (9) In order to solve the above problems, a heat treatment apparatus according to an aspect of the present invention is arranged in a heat treatment chamber in which a metal workpiece is heated for heat treatment, and the heat treatment chamber in which the heating member is arranged. A cooling nozzle including an injection port, the cooling nozzle supplying a cooling gas to the object to be processed for the heat treatment, and the injection port disposed in the heat treatment chamber for holding the object to be processed. And a provided holding member.

  According to this configuration, the heating member and the nozzle of the cooling nozzle are arranged in the same heat treatment chamber. Thereby, the cooling process of the to-be-processed object by a cooling nozzle can be started more rapidly after the heating of the to-be-processed object by a heating member is completed. As a result, the unintended temperature decrease amount of the object to be processed during the period from the completion of the heating process to the start of the cooling process can be further reduced. Thereby, the temperature of each part of the said to-be-processed object at the time of the start of cooling of a to-be-processed object can be made more equal. Therefore, the distortion of the workpiece can be more reliably reduced through the reduction in the variation in the cooling degree of the workpiece, that is, the uniformity of the quenching temperature. Furthermore, since the holding member is provided with the cooling nozzle injection port, the distance between the injection port and the object to be processed can be further shortened when the object to be processed is cooled. Thereby, since a cooling gas can be injected with a stronger jet from a cooling nozzle toward a processed material, a processed material can be cooled more rapidly. As a result, in the heat treatment apparatus, the performance of heat treating the workpiece can be further increased. Further, in the heat treatment apparatus, the heating member and the nozzle of the cooling nozzle are not arranged in separate rooms. For this reason, the heat treatment apparatus can be made more compact, and the manufacturing cost of the heat treatment apparatus can be reduced through simplification of the structure of the heat treatment apparatus. Further, there is no need for a device that transports the object to be processed from a separately provided heating chamber to a cooling chamber. In addition, since a gas, which is a gas, is used for cooling the object to be processed, the object to be processed does not need to be subjected to a large cleaning process after the cooling process using the cooling nozzle. Furthermore, unlike the case where the object to be processed is cooled using a coolant such as water or oil, the heat treatment chamber can be prevented from being contaminated with the refrigerant, so that the heating member and the nozzle of the cooling nozzle are placed in the same heat treatment chamber. Can be placed. Furthermore, unlike the case of cooling an object to be processed using a coolant such as water or oil, the degree of the load exerted on the global environment by the coolant can be remarkably reduced, and a cleaning device for the cleaning process after the cooling process is unnecessary. Yes, the manufacturing cost and operating cost of the heat treatment apparatus can be reduced.

  (10) When the holding member is provided with at least one of a placing jig for placing the object to be treated and a holding jig for suppressing displacement of the object to be treated when the heat treatment is performed. There is.

  According to this structure, the injection port of a cooling nozzle can be arrange | positioned near the to-be-processed object.

  (11) The heat treatment apparatus further includes a position adjusting unit that adjusts a relative position between the ejection port and the object to be processed when the object to be processed is cooled, and the position adjusting unit displaces the pressing jig. By doing so, the relative position between the ejection port and the object to be processed may be adjusted.

  According to this configuration, the relative position between the injection port of the cooling nozzle and the object to be processed can be adjusted with a simple structure in which the holding jig is displaced.

  ADVANTAGE OF THE INVENTION According to this invention, the heat processing apparatus which can improve the performance which heat-processes to-be-processed object can be provided. In addition, since a simple configuration can be realized for the heat treatment apparatus, the manufacturing cost of the heat treatment apparatus can be further reduced. In addition, the time required for the heat treatment can be further shortened.

It is a typical side view of a heat processing apparatus, Comprising: The to-be-processed object has shown the state arrange | positioned in a heating / cooling position, and has shown partly cut | disconnecting the heat processing apparatus. It is a flowchart for demonstrating an example of the quenching process in a heat processing apparatus. It is a figure which shows the principal part of a 1st modification. It is a figure which shows the principal part of a 2nd modification. It is a figure which shows a 3rd modification. It is a figure which shows a 4th modification. It is a figure which shows a 5th modification. It is a figure which shows the 6th modification. It is a figure which shows the 7th modification.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic side view of the heat treatment apparatus 1, showing a state in which the workpiece 100 is disposed at the heating / cooling position P <b> 2, with a part of the heat treatment apparatus 1 cut away. Yes.

  In the following, the left-right direction X1 (conveying direction A1 of the workpiece 100), the front-rear direction Y1, and the up-down direction Z1 are defined with reference to the state of the heat treatment apparatus 1 viewed from the front.

  Referring to FIG. 1, heat treatment apparatus 1 is provided for subjecting object 100 to heat treatment including heat treatment and cooling treatment. Examples of the heat treatment include quenching, carburizing, and soaking. In addition, the heat processing performed with the heat processing apparatus 1 should just contain heat processing and a cooling process, and a specific example is not specifically limited. Moreover, in this embodiment, the to-be-processed object 100 is a metal component, for example, a ring which becomes an outer ring or an inner ring of a bearing. In addition, the to-be-processed object 100 may be cylindrical members, such as a gearwheel, and may be solid members, such as a shaft.

  Steel materials such as SCM material (chromium molybdenum steel), SCr material (chromium steel material), SNCM material (nickel chrome molybdenum steel material), SUJ (high carbon chrome bearing steel material), etc. as the metal material constituting the workpiece 100 It can be illustrated.

  The workpiece 100 is particularly preferably a small component having a mass of several grams to several tens of kilograms, and the heat treatment apparatus 1 of this embodiment is more suitable for heat treatment of small components.

  The heat treatment apparatus 1 includes a heat treatment chamber 2, a transport mechanism 3, a heating member 4, a holding unit 5, an upper cooling nozzle 11, a gas supply unit 6, and a position adjustment unit 7.

  The heat treatment chamber 2 is a housing portion of the heat treatment apparatus 1 and forms a space for performing heat treatment and cooling treatment on the workpiece 100. That is, in this embodiment, the workpiece 100 is subjected to both heat treatment and cooling treatment in the same space. The heat treatment chamber 2 is formed in a substantially rectangular parallelepiped box shape. In the present embodiment, the pressure in the space in the heat treatment chamber 2 is atmospheric pressure, neither a pressurized state nor a vacuum state. Note that the heat treatment chamber 2 may be configured to heat the workpiece 100 in a state of being evacuated by a vacuum pump (not shown).

  The heat treatment chamber 2 is arranged at four side walls 21 extending in the up-down direction Z1 (illustration of the side wall on the front side of the drawing is omitted), a top wall 22 arranged on the upper side of the side wall 21, and a lower side of the side wall 21. And a bottom wall 23 formed.

  The four side walls 21 are formed in a hollow quadrangular prism shape as a whole. An inlet 24 that is an opening is formed in the right wall 21. The workpiece 100 is carried into the heat treatment chamber 2 from the inlet 24. An outlet 25 that is an opening is formed in the left side wall 21. The workpiece 100 is carried out of the heat treatment chamber 2 through the outlet 25.

  An entrance door 26 is provided at the entrance 24, and an exit door 27 is provided at the exit 25.

  The entrance door 26 closes the entrance 24 by being disposed at the closed position. Moreover, the entrance door 26 opens the entrance 24 by being arrange | positioned in an open position. The entrance door 26 is opened and closed by an opening / closing mechanism (not shown).

  The exit door 27 closes the exit 25 by being arranged at the closed position. Moreover, the exit door 27 opens the exit 25 by arrange | positioning in an open position. The exit door 27 is opened and closed by an opening / closing mechanism (not shown).

  A transfer mechanism 3 is provided in the heat treatment chamber 2 having the above configuration.

  The conveyance mechanism 3 conveys the workpiece 100 in the order of the inlet 24, the lifting position P1, and the outlet 25. In the present embodiment, the transport mechanism 3 is a belt conveyor type transport mechanism.

  The transport mechanism 3 includes a transport tray 31 on which the workpiece 100 is placed and a moving mechanism 32 that moves the transport tray 31 in the left-right direction X1.

  The transport tray 31 is a transport support member for supporting the workpiece 100 and is formed in a flat plate shape. In the present embodiment, the transfer tray 31 is separated from the workpiece 100 during the heat treatment of the workpiece 100 in the heat treatment apparatus 1, and is prevented from receiving high heat from the heating member 4. A hole 31 a penetrating through the transport tray 31 is formed at the center of the transport tray 31. A plurality of cantilever stays 31b extend from the peripheral edge of the hole 31a.

  The workpiece 100 is received by the stay 31 b, and the lower surface of the workpiece 100 is exposed from the hole 31 a of the transport tray 31 to the lower side of the transport tray 31. Both ends of the transport tray 31 in the front-rear direction Y1 are supported by the moving mechanism 32.

  The moving mechanism 32 includes an annular member 33 extending in the left-right direction X1, a pair of rotating shafts 34 and 35 around which the annular member 33 is wound, and an electric motor 36 that rotationally drives one rotating shaft 35. Yes.

  The annular member 33 is an endless transmission member such as a metal chain or a metal belt, and is provided in a pair in the heat treatment chamber 2 so as to be separated in the front-rear direction Y1 (in the figure, one of the members disposed on the front side of the paper surface). The illustration of the annular member 33 is omitted). A transport tray 31 is placed on the pair of annular members 33. One rotating shaft 35 is disposed near the outlet 25, and the other rotating shaft 34 is disposed near the inlet 24.

  The electric motor 36 is connected to one rotating shaft 35 through a gear mechanism or the like so as to be able to transmit power, and rotationally drives the one rotating shaft 35. With the above configuration, when the electric motor 36 is driven, the one rotation shaft 35 rotates, and the annular member 33 rotates accordingly. As a result, the transport tray 31 moves in the transport direction A1. A lifting position P1 is set, for example, in the center of the heat treatment chamber 2 in the left-right direction X1, and the transport tray 31 is disposed at the lifting position P1 by being transported from the inlet 24. The heating member 4 is disposed above the lifting position P1.

  The heating member 4 is a member that heats the workpiece 100 disposed in the heat treatment chamber 2 so as to be separated from the transport mechanism 3 along the vertical direction Z1 for heat treatment. In the present embodiment, the heating member 4 is an induction heating coil, and is configured to heat the workpiece 100 by induction heating. The heating member 4 is connected to an induction heating oscillator 8 as a power supply unit disposed outside the heat treatment chamber 2, and the workpiece 100 is induction heated by the electric power from the induction heating oscillator 8.

  The heating member 4 is configured by forming a conductive member such as copper in a spiral shape. The spiral portion of the heating member 4 is formed in a size that can surround the workpiece 100. In the present embodiment, the space surrounded by the spiral portion of the heating member 4 is defined as the heating / cooling space, and the heating / cooling position P2 is set in the space surrounded by the spiral portion. . One end and the other end of the heating member 4 extend linearly toward the rear, and are supported by the side wall 21 on the rear side of the heat treatment apparatus 1. One end and the other end of the heating member 4 are electrically connected to the induction heating oscillator 8, and high frequency power is supplied from the induction heating oscillator 8.

  In the present embodiment, the embodiment in which the heating member 4 is an induction heating coil will be described as an example, but this need not be the case. As the heating member, a gas burner, a ceramic heater, an electric heat lamp, a microwave heating device, or other known heating members may be used.

  The workpiece 100 placed on the transport tray 31 that has reached the lifting position P1 is lifted to the heating / cooling position P2 by being held by the holding unit 5, and the heating process and the cooling process are performed at the heating / cooling position P2. Applied. At least a part of the holding unit 5 is disposed in the heat treatment chamber 2.

  The holding unit 5 includes a placing jig 41 and a holding jig 42 as holding members for holding the workpiece 100, and the loading jig 41 and the holding jig 42 cooperate to perform heat treatment. The object 100 to be processed and the object 100 to be processed are held.

  The placing jig 41 is a member on which the workpiece 100 is placed, and extends in the vertical direction Z1 in this embodiment. In order to suppress induction heating by the heating member 4, the mounting jig 41 is preferably formed of a nonmagnetic material such as carbon. The mounting jig 41 is driven by a mounting jig displacement mechanism 51 provided in the position adjusting unit 7 so that the workpiece 100 is reciprocated in the vertical direction Z1 between the lifting position P1 and the heating / cooling position P2. Move. Further, the placing jig 41 is driven by the placing jig displacement mechanism 51 to rotate around the axis S <b> 1 extending in the vertical direction Z <b> 1 together with the workpiece 100.

  The placing jig 41 is arranged at a standby position P3 below the lifting position P1 except when the workpiece 100 is placed. When the workpiece 100 reaches the lifting position P1 by the transport mechanism 3, the placing jig 41 is displaced upward by the placing jig displacement mechanism 51 from the standby position P3. As a result, the loading jig 41 passes through the hole 31a of the transport tray 31 and moves upward above the hole 31a while avoiding the stay 31b, and lifts the workpiece 100 on the transport tray 31. 100 is lifted to the heating / cooling position P2. When the workpiece 100 is heat-treated, the mounting jig 41 can rotate around the axis S1 together with the workpiece 100 by driving the mounting jig displacement mechanism 51 at the heating / cooling position P2. By such rotation operation, each part of the workpiece 100 is heated and cooled more evenly. The placing jig 41 does not have to rotate around the axis S1.

  The mounting jig 41 includes a shaft portion 43 and a pedestal portion 44 provided at the upper end of the shaft portion 43.

  The shaft portion 43 is a shaft portion that extends vertically, and receives power from the mounting jig displacement mechanism 51. The central axis of the shaft portion 43 is the axis S1. The pedestal portion 44 has a shape extending radially in plan view so as to avoid contact with the stay 31b. The workpiece 100 is placed on the upper surface of the pedestal 44. In the heating / cooling position P <b> 2, the pedestal 44 is surrounded by the heating member 4 and is separated from the heating member 4. The diameter of the pedestal 44 is preferably larger than the outer diameter of the workpiece 100, but may be equal to or smaller than the outer diameter of the workpiece 100. A holding jig 42 is arranged so as to face the mounting jig 41 having the above-described configuration in the vertical direction Z1.

  The holding jig 42 is provided to suppress the displacement of the workpiece 100 when the workpiece 100 is subjected to heat treatment. More specifically, the holding jig 42 suppresses the workpiece 100 from being lifted from the mounting jig 41 by the action of a magnetic field generated during induction heating of the workpiece 100 by the heating member 4. Further, the holding jig 42 suppresses the workpiece 100 from moving relative to the mounting jig 41 due to the injection of the cooling gas when the workpiece 100 is cooled by the upper cooling nozzle 11.

  The holding jig 42 is preferably formed of a nonmagnetic material such as carbon in order to suppress induction heating by the heating member 4. The holding jig 42 is driven by a holding jig / cooling nozzle displacement mechanism 52 provided in the position adjustment unit 7, so that the position in the vertical direction Z <b> 1 with respect to the mounting jig 41 (the workpiece 100) is set. . For example, the holding jig 42 moves from the state where it is placed at the standby position P4 above the heating member 4 to the heating / cooling position P2 after the placing jig 41 and the workpiece 100 reach the heating / cooling position P2. Descent. The holding jig 42 is adjacent to the mounting jig 41 and the workpiece 100 at the heating / cooling position P2 when the workpiece 100 is heated and cooled. The holding jig 42 is driven by the holding jig / cooling nozzle displacement mechanism 52 after the heating process and the cooling process of the workpiece 100 are completed, thereby returning to the standby position P4.

  The pressing jig 42 includes a shaft portion 45 and a pressing portion 46 provided at the lower end of the shaft portion 45.

  The shaft portion 45 is a shaft portion extending in the vertical direction, and is supplied with power from the holding jig / cooling nozzle displacement mechanism 52. In the present embodiment, the upper end portion of the shaft portion 45 penetrates the top wall 22 of the heat treatment chamber 2, but the entire shaft portion 45 may be disposed in the heat treatment chamber 2. The pressing portion 46 is formed in, for example, a disk shape, and the lower surface of the pressing portion 46 can contact the upper surface of the workpiece 100. In the present embodiment, the outer diameter of the pressing portion 46 is set to be substantially the same as the outer diameter of the pedestal portion 44. Further, in the heating / cooling position P <b> 2, the pressing portion 46 is surrounded by the heating member 4 and is separated from the heating member 4. In addition, the holding | suppressing part 46 may be arrange | positioned in the regular heating / cooling position P2.

  In the present embodiment, the holding jig 42 is provided with the upper cooling nozzle 11 as a cooling nozzle.

  The upper cooling nozzle 11 has an injection port 11a. The injection port 11a is disposed in the heat treatment chamber 2 in which the heating member 4 is disposed. The injection port 11a injects cooling gas toward the workpiece 100 for heat treatment. In the present embodiment, most of the upper cooling nozzle 11 is disposed in the heat treatment chamber 2. The upper cooling nozzle 11 rapidly cools the workpiece 100 by injecting a cooling gas toward the workpiece 100 after being heated by the heating member 4. The upper cooling nozzle 11 injects cooling gas from above the workpiece 100. In the present embodiment, the upper cooling nozzle 11 is provided as a proximity cooling nozzle.

  More specifically, when the workpiece 100 is cooled, the injection port 11a of the upper cooling nozzle 11 is disposed at the heating / cooling position P2. Thereby, during the heat treatment (cooling) of the workpiece 100, the distance D1 between the injection port 11a of the upper cooling nozzle 11 and the workpiece 100 is the distance D2 (shortest distance) between the heating member 4 and the workpiece 100. ), The upper cooling nozzle 11 is arranged so as to be shorter (D1 <D2). The upper cooling nozzle 11 sprays a large amount of cooling gas onto the surface of the workpiece 100 by jetting the cooling gas vigorously toward the workpiece 100.

  In the present embodiment, the injection port 11 a of the upper cooling nozzle 11 is formed on the lower surface of the pressing portion 46 of the pressing jig 42, and is disposed at the center of the pressing portion 46, for example. The inner diameter of the injection port 11a of the upper cooling nozzle 11 is appropriately set according to the flow rate of the cooling gas. The injection port 11a of the upper cooling nozzle faces the pedestal 44 disposed at the heating / cooling position P2 vertically. In the present embodiment, since the workpiece 100 is cylindrical, the upper cooling nozzle 11 faces a hole 100 a formed at the center of the workpiece 100. The upper cooling nozzle 11 is a cylindrical portion formed across the pressing portion 46 and the shaft portion 45, and is connected to the gas supply unit 6, and the cooling gas is supplied from the gas supply unit 6.

  Examples of the cooling gas include an inert gas and a reducing gas. Examples of the inert gas include nitrogen gas, helium gas, and argon gas. Examples of the reducing gas include hydrocarbon, carbon monoxide, and hydrogen. As the cooling gas, one or more of the above gases are preferably used. The cooling gas may be formed by mixing water mist with the above gas.

  In the present embodiment, the embodiment in which one injection port 11a is formed in the holding jig 42 is described as an example, but this need not be the case. For example, a plurality of injection holes 11 a may be formed in the holding portion 46 of the holding jig 42. When a plurality of injection ports 11a of the upper cooling nozzle 11 are provided on the lower surface of the pressing portion 46, the injection ports 11a are arranged at equal intervals along the circumferential direction of the workpiece 100 (the circumferential direction around the axis S1). .

  The gas supply unit 6 has a control valve 48 connected to a passage in the upper cooling nozzle 11. The control valve 48 is, for example, an electromagnetic valve, and is set to a predetermined valve opening based on a control signal. The control valve 48 is connected to a cooling gas source 49 such as a tank in which cooling gas is stored. The cooling gas from the cooling gas source 49 is sent to the upper cooling nozzle 11 through the control valve 48 at a predetermined pressure and flow rate. The control valve 48 and the upper cooling nozzle 11 (cooling nozzle) are connected by a pipe including a flexible pipe (not shown). Thereby, the relative displacement of the upper cooling nozzle 11, the control valve 48, and the heat treatment chamber 2 according to the vertical displacement of the upper cooling nozzle 11 is possible.

  When the workpiece 100 is heated, it is preferable to set the relative positions of the placing jig 41 and the holding jig 42 so that the workpiece 100 does not float by magnetic force. Further, when the workpiece 100 is cooled, the injection port 11a of the upper cooling nozzle 11 is disposed closer to the workpiece 100 so that the flow rate of the relatively low-temperature cooling gas toward the workpiece 100 is increased. It is preferable. Therefore, in the present embodiment, the position adjusting unit 7 is provided.

  The position adjusting unit 7 is configured to adjust the relative position between the heating member 4 and the object to be processed 100 and the relative position between the holding jig 42 and the object to be processed 100 when the object to be processed 100 is heated. ing. Further, the position adjustment unit 7 is configured to adjust the relative position between the ejection port 11 a of the upper cooling nozzle 11 and the object to be processed 100 when the object to be processed 100 is cooled.

  The position adjustment unit 7 includes a mounting jig displacement mechanism 51, a holding jig / cooling nozzle displacement mechanism 52, and a control unit 53.

  The mounting jig displacement mechanism 51 is a holding member displacement mechanism that displaces the mounting jig 41 as a holding member with respect to the ejection port 11 a of the upper cooling nozzle 11. The mounting jig displacement mechanism 51 has a function of moving the mounting jig 41 in the vertical direction Z1 and a function of rotating the mounting jig 41 about the axis S1. For example, the mounting jig displacement mechanism 51 is disposed below the transport mechanism 3 and is disposed adjacent to the shaft portion 43 of the mounting jig 41.

  The mounting jig displacement mechanism 51 includes a linear displacement mechanism 56 and a rotation mechanism 57.

  The linear displacement mechanism 56 is provided for linearly moving the mounting jig 41 in the vertical direction Z1. The linear displacement mechanism 56 is formed using, for example, a rack and pinion mechanism, a ball screw mechanism, or the like, and converts the rotational force of the electric motor provided in the linear displacement mechanism 56 into the vertical movement of the mounting jig 41. . With this configuration, the linear displacement mechanism 56 reciprocates the mounting jig 41 between the standby position P1 and the heating / cooling position P2.

  The rotation mechanism 57 rotates the workpiece 100 during the heat treatment by rotating the mounting jig 41 positioned at the heating / cooling position P2 around the axis S1. The rotating mechanism 57 includes, for example, a table on which the linear displacement mechanism 56 and the mounting jig 41 are mounted, a rotating unit that rotates the table around the axis S1, and an electric motor that applies driving force to the rotating unit. The rotational force of the electric motor is converted into the rotational force of the table. The rotation mechanism 57 is not limited as long as it can rotate the mounting jig 41 positioned at the heating / cooling position P2 around the axis S1.

  The holding jig / cooling nozzle displacement mechanism 52 is a holding member displacement mechanism for displacing the holding jig 42 with respect to the mounting jig 41. The holding jig / cooling nozzle displacement mechanism 52 is a cooling nozzle displacement mechanism that displaces the ejection port 11 a of the upper cooling nozzle 11 with respect to the workpiece 100. The holding jig / cooling nozzle displacement mechanism 52 displaces the holding jig 42 and the upper cooling nozzle 11 to adjust the relative position between the ejection port 11 a of the upper cooling nozzle 11 and the workpiece 100.

  More specifically, the holding jig / cooling nozzle displacement mechanism 52 moves the holding jig 42 and the upper cooling nozzle 11 in the vertical direction Z1. The holding jig / cooling nozzle displacement mechanism 52 is disposed, for example, above the heating member 4 and is disposed adjacent to the shaft portion 45 of the holding jig 42.

  The holding jig / cooling nozzle displacement mechanism 52 is formed by using, for example, a rack and pinion mechanism, a ball screw mechanism, or the like, and uses the rotational force of the electric motor provided in the holding jig / cooling nozzle displacement mechanism 52. The vertical movement of the holding jig 42 is converted. With this configuration, the holding jig / cooling nozzle displacement mechanism 52 reciprocates the holding jig 42 and the upper cooling nozzle 11 between the standby position P4 and the heating / cooling position P2.

  With the above configuration, the lifting position P1, the heating / cooling position P2, and the standby positions P3 and P4 are arranged in the vertical direction Z1.

  The placing jig displacement mechanism 51 and the holding jig / cooling nozzle displacement mechanism 52 are controlled by the control unit 53.

  The control unit 53 has a configuration for outputting a predetermined output signal based on a predetermined input signal, and can be formed using, for example, a safe programmable controller (PLC). The safe programmable controller refers to a publicly certified programmable controller having a safety function of SIL2 or SIL3 of JIS (Japanese Industrial Standard) C 0508-1. The control unit 53 may be formed using a computer including a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory).

  The controller 53 is configured to control the relative position between the heating member 4 and the object to be processed 100 and the relative position between the holding jig 42 and the object to be processed 100 when the object to be processed 100 is heated. Yes. The control unit 53 is configured to control the relative position between the ejection port 11 a of the upper cooling nozzle 11 and the object to be processed 100 when the object to be processed 100 is cooled. For example, the control unit 53 is disposed outside the heat treatment chamber 2.

  The control unit 53 includes an induction heating oscillator 8 as a device, an electric motor 36 of the conveyance mechanism 3, an electric motor of the linear displacement mechanism 56 of the mounting jig displacement mechanism 51, an electric motor of the rotation mechanism 57, a holding jig / cooling nozzle displacement. The electric motor of the mechanism 52 and the control valve 48 of the gas supply unit 6 are electrically connected to control these devices.

  Next, an example of the heat treatment operation in the heat treatment apparatus 1 will be described. FIG. 2 is a flowchart for explaining an example of the quenching process in the heat treatment apparatus 1. In addition, below, when it demonstrates with reference to a flowchart, it demonstrates, referring also to figures other than a flowchart suitably.

  Referring to FIGS. 1 and 2, in the standby state before the heat treatment operation by heat treatment apparatus 1 is performed, transfer tray 31 and workpiece 100 are arranged in the vicinity of inlet 24 in heat treatment chamber 2. Furthermore, the placing jig 41 and the holding jig 42 are disposed at corresponding standby positions P1 and P4. The atmosphere in the heat treatment chamber 2 is the same gas atmosphere as the cooling gas by supplying a predetermined amount of cooling gas from the cooling gas supply unit 6 to the upper cooling nozzle 11 in advance. That is, the cooling gas supply unit 6 is also a gas supply unit for adjusting the atmosphere in the heat treatment chamber 2.

  When the heat treatment operation in the heat treatment apparatus 1 is started, the control unit 53 drives the electric motor 36 of the transfer mechanism 3 to transfer the transfer tray 31 to the lifting position P1 (step S1).

  Next, the control unit 53 drives the electric motor of the linear displacement mechanism 56. Thereby, the mounting jig 41 lifts the workpiece 100 from the standby position P1 through the hole 31a of the transport tray 31, and moves up to the heating / cooling position P2 together with the workpiece 100 (step S2). At this time, the electric motor of the linear displacement mechanism 56 is controlled by the program of the control unit 53 so that the workpiece 100 reaches the position where the workpiece 100 is most efficiently heated by the heating member 4. For example, the placing jig 41 is raised so that the workpiece 100 is arranged at the center of the heating / cooling position P2 in the vertical direction Z1.

  Next, the control unit 53 drives the electric motor of the holding jig / cooling nozzle displacement mechanism 52 to lower the holding jig 42 and the upper cooling nozzle 11 from the standby position P4 to the heating / cooling position P2 ( Step S3). At this time, the control unit 53 sets the relative position between the injection port 11a of the upper cooling nozzle 11 and the object to be processed 100 so that the cooling gas from the upper cooling nozzle 11 is injected most efficiently into the object to be processed 100. To do. For example, the holding jig 42 and the upper cooling nozzle 11 are arranged so that the distance between the ejection port 11a of the upper cooling nozzle 11 and the workpiece 100 is about several mm.

  The operation of raising the workpiece 100 to the heating / cooling position P2 (step S2) and the operation of lowering the holding jig 42 and the upper cooling nozzle 11 to the heating / cooling position P2 (step S3) are performed simultaneously. It may be broken. Further, by keeping the holding jig 42 and the upper cooling nozzle 11 at the constant heating / cooling position P2, the operation of lowering the holding jig 42 and the upper cooling nozzle 11 from the standby position P4 to the heating / cooling position P2 ( Step S3) may not be performed.

  Next, the control unit 53 instructs the induction heating oscillator 8 to supply power for induction heating to the heating member 4, thereby performing the heating process of the workpiece 100 by the heating member 4 (step S4). ). Thereby, the heating member 4 causes the workpiece 100 to perform induction heating and heats the workpiece 100 to a predetermined heating temperature. At this time, the controller 53 may heat each part of the workpiece 100 more evenly by driving the electric motor of the rotation mechanism 57 to rotate the workpiece 100. After the workpiece 100 is heated to a predetermined temperature for a predetermined time, the control unit 53 instructs the induction heating oscillator 8 to stop power supply to the heating member 4, so that the processing by the heating member 4 is performed. The heat treatment of the object 100 is completed. When the electric motor (object 100) of the rotation mechanism 57 is rotating, this rotation is maintained.

  Next, a cooling process for the workpiece 100 is performed (step S5). Specifically, the control unit 53 outputs a command signal to the control valve 48 so that the control valve 48 has a predetermined opening, thereby allowing the control unit 53 to pass through the injection port 11a of the upper cooling nozzle 11 from the cooling gas supply unit 6. Cooling gas is sprayed onto the workpiece 100. Thereby, as shown by arrow F1, the cooling gas is jetted from the jetting port 11a to the workpiece 100, thereby rapidly cooling the workpiece 100. At this time, the controller 53 can cool each part of the workpiece 100 more evenly by driving the electric motor of the rotation mechanism 57 to rotate the workpiece 100. Then, when the flow rate of the cooling gas from the upper cooling nozzle 11 reaches a predetermined value, the control unit 53 controls the control valve 48 so as to close the control valve 48. Thereby, the cooling process of the workpiece 100 is completed. That is, the heat treatment of the workpiece 100 is completed. When the electric motor (object 100) of the rotation mechanism 57 is rotating, this rotation is also stopped.

  Next, the control unit 53 drives the electric motor of the holding jig / cooling nozzle displacement mechanism 52 to raise the holding jig 42 and the upper cooling nozzle 11 to the standby position P4 (step S6).

  Next, the control unit 53 drives the electric motor of the linear displacement mechanism 56 to lower the workpiece 100 to the lifting position P1 (step S7). Thereby, the workpiece 100 is again placed on the peripheral edge of the stay 31b of the transport tray 31. At this time, the placing jig 41 is lowered to the standby position P3.

  The operation of raising the holding jig 42 and the upper cooling nozzle 11 to the standby position P4 (step S6) and the operation of lowering the workpiece 100 to the lifting position P1 (step S7) may be performed simultaneously. . Further, by keeping the holding jig 42 and the upper cooling nozzle 11 at the constant heating / cooling position P2, the operation of raising the holding jig 42 and the upper cooling nozzle 11 to the standby position P4 (step S6) is not performed. May be.

  Next, the control part 53 conveys the conveyance tray 31 from the lifting position P1 to the exit 25 by driving the electric motor 36 of the conveyance mechanism 3 (step S8). Thereafter, the exit door 27 is opened, and the workpiece 100 is unloaded from the heat treatment chamber 2.

  As described above, according to the present embodiment, the heating member 4 and the injection port 11a of the upper cooling nozzle 11 are arranged in the same heat treatment chamber 2. Thereby, the cooling process of the to-be-processed object 100 by the upper cooling nozzle 11 can be started more rapidly after the heating of the to-be-processed object 100 by the heating member 4 is completed. As a result, the unintended temperature decrease amount of the workpiece 100 from the completion of the heating process to the start of the cooling process can be further reduced. Thereby, the temperature of each part of the said to-be-processed object 100 at the time of the cooling start of the to-be-processed object 100 can be made more equal. Therefore, the distortion of the workpiece can be more reliably reduced through the reduction in the variation in the cooling degree of the workpiece 100, that is, the uniformity of the quenching temperature. Further, a position adjusting unit 7 is provided. Moreover, the injection hole 11a of the upper cooling nozzle 11 is provided in the pressing jig 42 as a holding member. Thereby, the distance of the to-be-processed object 100 and the injection hole 11a of the upper cooling nozzle 11 at the time of cooling the to-be-processed object 100 can be shortened. As a result, the cooling gas can be injected with a stronger jet from the upper cooling nozzle 11 toward the object to be processed 100, so that the object to be processed 100 can be cooled more quickly. As a result, in the heat treatment apparatus 1, the performance of heat treating the workpiece 100 can be further increased. Moreover, in the heat processing apparatus 1, it is not the structure which arrange | positions the heating member 4 and the injection outlet 11a of the upper cooling nozzle 11 in a separate room. Therefore, the heat treatment apparatus 1 can be made more compact, and the manufacturing cost of the heat treatment apparatus 1 can be reduced through simplification of the configuration of the heat treatment apparatus 1. Further, an apparatus for transporting the workpiece 100 from the heating chamber provided separately to the cooling chamber at a high speed is unnecessary. In addition, since a gas, which is a gas, is used for cooling the object to be processed 100, the object to be processed 100 does not need to be subjected to a large cleaning process after the cooling process using the upper cooling nozzle 11. Further, unlike the case where the object to be processed 100 is cooled using a coolant such as water or oil, the inside of the heat treatment chamber 2 can be prevented from being contaminated with the coolant (cooling gas), so that the heating member 4 and the upper cooling nozzle 11 can be prevented. Can be arranged in the same heat treatment chamber 2. Furthermore, unlike the case where the workpiece 100 is cooled using a coolant such as water or oil, the degree to which the coolant (cooling gas) exerts a burden on the global environment can be remarkably reduced, and the cleaning step for the cooling step can be performed. A cleaning apparatus is unnecessary, and the manufacturing cost and operation cost of the heat treatment apparatus 1 can be further reduced. In addition, since the cleaning step after the cooling step is not required, the time required for the heat treatment can be further shortened.

  Further, according to the present embodiment, the workpiece 100 during the heat treatment can be maintained in a stable posture by the mounting jig 41.

  Further, according to the present embodiment, the holding jig 42 for suppressing the displacement of the workpiece 100 when the heat treatment is performed is provided. According to this configuration, when the cooling gas is injected from the upper cooling nozzle 11 to the workpiece 100, it is possible to more reliably suppress the workpiece 100 from being displaced.

  Moreover, according to this embodiment, the mounting jig displacement mechanism 51 is provided. According to this configuration, the injection jig 11a of the upper cooling nozzle 11 and the object to be processed 100 at the time of cooling the object to be processed 100 are simply configured to displace the mounting jig 41 with respect to the injection hole 11a of the upper cooling nozzle 11. The relative position of can be adjusted.

  Further, according to the present embodiment, the upper cooling nozzle 11 injects the cooling gas from above the workpiece 100 toward the workpiece 100. According to this configuration, it is possible to supply more cooling gas toward the entire workpiece 100 including the portion of the workpiece 100 that is close to the injection port 11a of the upper cooling nozzle 11.

  Further, according to the present embodiment, when the workpiece 100 is cooled, the distance D1 between the ejection port 11a of the upper cooling nozzle 11 and the workpiece 100 is larger than the distance D2 between the heating member 4 and the workpiece 100. The upper cooling nozzle 11 is arranged so as to be shorter. According to this configuration, since a stronger jet is applied from the injection port 11a of the upper cooling nozzle 11 toward the workpiece 100, the workpiece 100 can be cooled more quickly and evenly.

  Further, according to the present embodiment, the holding jig / cooling nozzle displacement mechanism 52 of the position adjusting unit 7 displaces the ejection port 11 a of the upper cooling nozzle 11 with respect to the workpiece 100. According to this configuration, the injection port 11a of the upper cooling nozzle 11 and the workpiece 100 can be displaced with a simple configuration in which the injection port 11a of the upper cooling nozzle 11 is displaced with respect to the workpiece 100. The relative position of can be adjusted.

  Further, according to the present embodiment, the position adjustment unit 7 includes the control unit 53. According to this configuration, the control unit 53 can control the relative position between the ejection port 11 a of the upper cooling nozzle 11 and the object to be processed 100 according to characteristics such as the shape of the object to be processed 100. As a result, the relative position between the ejection port 11a of the upper cooling nozzle 11 and the object to be processed 100 can be set more appropriately under the control of the control unit 53 for various objects to be processed 100 having different shapes. As a result, the versatility of the heat treatment apparatus 1 can be further increased, and the application of the heat treatment apparatus 1 can be broadened without changing specifications.

  Further, according to the present embodiment, the upper cooling nozzle 11 is provided in the holding jig 42. According to this configuration, since the injection port 11a of the upper cooling nozzle 11 can be disposed closer to the lower surface of the holding jig 42, the injection port 11a of the upper cooling nozzle 11 can be disposed closer to the workpiece 100. . As a result, a stronger jet of cooling gas can be supplied from the upper cooling nozzle 11 to the object 100 to be processed 100. Further, since the holding jig 42 and the injection port 11a of the upper cooling nozzle 11 can be displaced collectively, the configuration of the heat treatment apparatus 1 is compared with the configuration in which the position of the holding jig 42 and the upper cooling nozzle 11 is separately controlled. Can be made simpler.

  Further, according to the present embodiment, the holding jig / cooling nozzle displacement mechanism 52 adjusts the relative position between the ejection port 11 a of the upper cooling nozzle 11 and the workpiece 100 by displacing the holding jig 42. According to this configuration, the relative position between the ejection port 11a of the upper cooling nozzle 11 and the object to be processed 100 when the object to be processed 100 is cooled can be adjusted with a simple structure in which the holding jig 42 is displaced.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment. The present invention can be variously modified as long as it is described in the claims. In the following, differences from the above-described embodiment will be mainly described, and the same components as those in the above-described embodiment may be denoted by the same reference numerals and detailed description thereof may be omitted.

  (1) In the above-described embodiment, the distance D1 between the injection port 11a of the upper cooling nozzle 11 and the workpiece 100 is shorter than the distance D2 (shortest distance) between the heating member 4 and the workpiece 100 (D1). <D2) As described above, an example in which the upper cooling nozzle 11 is arranged has been described. However, this need not be the case. The upper cooling nozzle 11 is arranged so that the distance D1 between the ejection port 11a of the upper cooling nozzle 11 and the object to be processed 100 is not less than the distance D2 between the heating member 4 and the object to be processed 100 (D1 ≧ D2). Forms may be implemented. In this case, the cooling gas from the injection port 11a of the upper cooling nozzle 11 is sprayed on the workpiece 100 from the upper side of the heating member 4 outside the heating member 4, for example. According to this embodiment, similarly to the above-described embodiment, it is possible to provide a heat treatment apparatus that can further improve the performance of heat treating the workpiece 100, and to reduce the manufacturing cost of the heat treatment apparatus through simplification of the configuration of the heat treatment apparatus. it can.

  (2) In the above-described embodiment, an example in which the upper surface of the base portion 44 of the mounting jig 41 is flat has been described. However, this need not be the case. For example, referring to FIG. 3 showing the main part of the first modified example, the cooling gas guide part 60 may be formed in the pedestal part 44 of the mounting jig 41. The cooling gas guide unit 60 is provided to diffuse the cooling gas injected from the upper cooling nozzle 11 more evenly around the workpiece 100 in the space between the pressing jig 42 and the mounting jig 41. The cooling gas guide part 60 includes, for example, a recess 61 formed by recessing the upper surface of the pedestal 44. The hollow portion 61 is disposed at the center of the pedestal portion 44 and faces the upper cooling nozzle 11 in the up-down direction Z1. The hollow portion 61 is formed in a tapered shape that becomes shallower as it goes from the center of the upper surface of the pedestal portion 44 outward in the radial direction of the pedestal portion 44. The object to be processed 100 may be arranged so as to surround the depression 61 in plan view, or may be arranged so that a part of the lower surface of the object to be processed 100 faces the depression 61 in the vertical direction. If it is such a structure, as shown by arrow F2, the direction of the cooling gas injected downward from the upper cooling nozzle 11 will be smoothly changed in the hollow portion 61, and more toward the inner peripheral surface of the workpiece 100. Head evenly. As a result, the cooling rate of each part of the workpiece 100 with the cooling gas can be made more uniform.

  (3) In the first modified example described above, an example in which the upper surface of the pedestal portion 44 of the mounting jig 41 is depressed has been described. However, this need not be the case. For example, referring to FIG. 4 showing the main part of the second modified example, a cooling gas guide part 60 ′ may be formed in the base part 44 of the mounting jig 41. The cooling gas guide section 60 ′ is provided to diffuse the cooling gas injected from the upper cooling nozzle 11 more evenly around the workpiece 100 in the space between the pressing jig 42 and the mounting jig 41. . The cooling gas guide portion 60 ′ includes a raised portion 62 formed by raising the upper surface of the pedestal portion 44, for example. The raised portion 62 is disposed at the center of the pedestal portion 44 and faces the upper cooling nozzle 11 in the up-down direction Z1. The raised portion 62 is formed in a sharp protrusion shape whose height decreases from the center of the upper surface of the pedestal portion 44 to the outer side in the radial direction of the pedestal portion 44. The raised portion 62 may be formed in a conical taper shape. Further, the raised portion 62 may have a shape in which a circular arc surface 62b having a center 62a at a position separated from the pedestal portion 44 and the raised portion 62 in a vertical cross section perpendicular to the front-rear direction Y1 is arranged symmetrically. In the configuration in which the raised portion 62 is provided, as indicated by an arrow F2 ′, the cooling gas injected downward from the upper cooling nozzle 11 is smoothly changed in direction by the raised portion 62, and the workpiece 100 is processed. Head more evenly to the inner surface of the. As a result, the cooling rate of each part of the workpiece 100 with the cooling gas can be made more uniform.

  (4) Moreover, in the above-mentioned embodiment and modification, it demonstrated to the example the form by which the one upper cooling nozzle 11 is provided as a cooling nozzle. However, this need not be the case. For example, referring to FIG. 5 showing a third modification, side cooling nozzles 12 and 13 may be further provided as cooling nozzles.

  The side cooling nozzles 12 and 13 are elongated shaft-like nozzles disposed in the heat treatment chamber 2 and inject a cooling gas onto the workpiece 100 for heat treatment. The side cooling nozzles 12 and 13 inject cooling gas from the side of the workpiece 100 in the horizontal direction toward the workpiece 100. In the present embodiment, the side cooling nozzles 12 and 13 extend along the left-right direction X1. The side cooling nozzles 12 and 13 extend from the outside of the heating member 4 into the heating / cooling position P2 through a gap E1 formed in the winding portion of the induction heating coil of the heating member 4. The side cooling nozzles 12 and 13 are provided as proximity cooling nozzles, and the injection ports 12a and 13a of the side cooling nozzles 12 and 13 are disposed in the heating / cooling position P2 during the heat treatment of the workpiece 100. The When the workpiece 100 is cooled, the distance D3 between the ejection ports 12a and 13a of the side cooling nozzles 12 and 13 and the workpiece 100 is shorter than the distance D2 between the heating member 4 and the workpiece 100. Lateral cooling nozzles 12 and 13 are arranged on the side. The injection ports 12a and 13a of the side cooling nozzles 12 and 13 respectively face the outer peripheral surface 100b side of the workpiece 100 at the heating / cooling position P2. The cooling gas that has passed through the control valve 48 is supplied to the side cooling nozzles 12 and 13.

  The side cooling nozzles 12 and 13 spray a large amount of cooling gas directly over substantially the entire surface of the workpiece 100 by vigorously injecting the cooling gas toward the workpiece 100 as indicated by an arrow F3. In particular, the side cooling nozzles 12 and 13 inject the cooling gas onto the outer peripheral surface 100 b of the workpiece 100.

  According to this modification, it is possible to supply more cooling gas toward the entire workpiece 100 including the portion facing the side cooling nozzles 12 and 13 in the workpiece 100.

  (5) In addition, with reference to FIG. 6 which shows a 4th modification, the side cooling nozzles 12 and 13 may be arrange | positioned on the outer side of the heating member 4. FIG. In this case, the cooling gas from the injection ports 12a and 13a of the side cooling nozzles 12 and 13 passes through the gap E1 of the heating member 4 from the outer peripheral portion of the heating member 4 as shown by the arrow F3, and the heating / cooling position P2 Inwardly, the workpiece 100 is sprayed.

  If it is the structure of this 4th modification, cooling gas can be used also as cooling gas which prevents the heating member 4 from overheating.

  (6) In the above-described third modification and fourth modification, the side cooling nozzles 12 and 13 have been described as examples. However, this need not be the case. For example, referring to FIG. 7 showing a fifth modification, the side cooling nozzles 12 and 13 may be movable.

  In this case, the injection ports 12a and 13a of the side cooling nozzles 12 and 13 are placed between the standby positions P5 and P6 and the heating / cooling position P2 by the side cooling nozzle displacement mechanisms 54 and 55 provided in the position adjusting unit 7. Is reciprocated. The control valve 48 and the side cooling nozzles 12 and 13 are connected by piping including flexible piping (not shown). Thereby, the side cooling nozzle 12 can be relatively displaced with the displacement of the side cooling nozzle 12, the control valve 48 and the heat treatment chamber 2, and the side cooling nozzle 13 can be displaced with the displacement of the side cooling nozzle 13. 13 and the relative displacement between the control valve 48 and the heat treatment chamber 2 are possible.

  The side cooling nozzle displacement mechanisms 54 and 55 are cooling nozzle displacement mechanisms that displace the side cooling nozzles 12 and 13 with respect to the workpiece 100. The side cooling nozzle displacement mechanisms 54 and 55 adjust the relative positions of the ejection ports 12 a and 13 a of the side cooling nozzles 12 and 13 and the workpiece 100 by displacing the side cooling nozzles 12 and 13. At the time of cooling the workpiece 100, the distance D3 between the side cooling nozzles 12, 13 injection ports 12a, 13a and the workpiece 100 is shorter than the distance D2 between the heating member 4 and the workpiece 100. Side cooling nozzles 12 and 13 are arranged.

  The side cooling nozzle displacement mechanisms 54 and 55 are disposed, for example, radially outward of the heating member 4 and are disposed adjacent to the corresponding side cooling nozzles 12 and 13.

  The side cooling nozzle displacement mechanisms 54 and 55 are formed using, for example, a rack and pinion mechanism, a ball screw mechanism, or the like, and the rotational force of the electric motor provided in the side cooling nozzle displacement mechanisms 54 and 55 is used. , To the horizontal movement of the corresponding side cooling nozzles 12 and 13. With this configuration, the side cooling nozzle displacement mechanisms 54 and 55 reciprocate the side cooling nozzles 12 and 13 between the standby positions P5 and P6 and the heating / cooling position P2.

  The side cooling nozzle displacement mechanisms 54 and 55 are controlled by the control unit 53. The control unit 53 controls the side cooling nozzle displacement mechanism 54, so that the injection ports 12a, 13a of the side cooling nozzles 12, 13 are positioned at the standby positions P5, P6 except when the workpiece 100 is cooled. 55 electric motors are controlled. In addition, the controller 53 determines that the distance between the ejection ports 12a and 13a of the side cooling nozzles 12 and 13 and the outer peripheral surface 100b of the workpiece 100 is an appropriate value during the cooling process of the workpiece 100 (step S5). Thus, the rotation amount of the electric motor of the side cooling nozzle displacement mechanisms 54 and 55 is controlled.

  According to the fifth modification, the side cooling nozzles 12 and 13 do not get in the way when the workpiece 100 is displaced between the heating / cooling position P2 and the lifting position P1. In addition, when the workpiece 100 is cooled, the injection ports 12 a and 13 a of the side cooling nozzles 12 and 13 can be arranged in the immediate vicinity of the workpiece 100. Thereby, the cooling rate of the to-be-processed object 100 by cooling gas can be made higher.

  (7) In the above-described embodiment and each modification, the position where the workpiece 100 is heated and the position where the workpiece 100 is cooled are the same at the heating / cooling position P2. However, this need not be the case. For example, referring to FIG. 8 showing a sixth modified example, the position where workpiece 100 is heated may be different from the position where workpiece 100 is cooled.

  In this case, the heating / cooling position P2 in the embodiment is the heating position P2. The workpiece 100 is heated by the heating member 4 at the heating position P2 in step S4 shown in FIG. 2 and then lowered to the cooling position P7 together with the mounting jig 41 by driving the electric motor of the mounting jig displacement mechanism 51. A cooling process (step S5) is performed at the cooling position P7. At this time, it is preferable that the pressing jig 42 is lowered to the cooling position P <b> 7 side by driving the electric motor of the pressing jig / cooling nozzle displacement mechanism 52, and the relative position with respect to the workpiece 100 is maintained. The cooling position P7 may be below the heating / cooling position P2, may be above the lifting position P1, or may be the lifting position P1. When the cooling position P7 is the same as the lifting position P1, the workpiece 100 is cooled on the transport tray 31. The side cooling nozzles 12 and 13 are installed at positions avoiding contact with the transport tray 31 and the workpiece 100 transported by the transport mechanism 3. In this modification, the side cooling nozzles 12 and 13 may be fixed in position, and can be displaced in the horizontal direction by the side cooling nozzle displacement mechanisms 54 and 55 (not shown in FIG. 8). Also good.

  (8) In the above-described embodiment and each modification, an example in which the cooling gas is not injected from the mounting jig 41 has been described. However, this need not be the case. For example, referring to FIG. 9 showing a seventh modified example, a lower cooling nozzle 14 that injects a cooling gas from below the workpiece 100 may be provided as a cooling nozzle.

  The injection port 14a of the lower cooling nozzle 14 is disposed in the heat treatment chamber 2, and injects a cooling gas toward the workpiece 100 for the heat treatment. In this embodiment, the injection port 14 a of the lower cooling nozzle 14 is formed on the upper surface of the pedestal portion 44 of the mounting jig 41, and is disposed at the center of the pedestal portion 44, for example. The inner diameter of the injection port 14a of the lower cooling nozzle 14 is appropriately set according to the flow rate of the cooling gas. The injection port 14a of the lower cooling nozzle 14 faces the injection port 11a of the upper cooling nozzle 11 vertically.

  In this modification, the object 100 to be processed is cylindrical, so that the lower cooling nozzle 14 faces a hole 100 a formed at the center of the object 100 to be processed. The lower cooling nozzle 14 is a cylindrical portion formed across the pedestal 44 and the shaft 43, and is connected to the gas supply unit 6, and the cooling gas is supplied from the gas supply unit 6. The control valve 48 and the lower cooling nozzle 14 are connected by a pipe including a flexible pipe (not shown). Thereby, relative displacement of the lower cooling nozzle 14 with the displacement of the lower cooling nozzle 14, the control valve 48 and the heat treatment chamber 2 is possible.

  In this modification, the holding jig / cooling nozzle displacement mechanism 52 functions as a holding member displacement mechanism for displacing the holding jig 42 as a holding member with respect to the injection port 14 a of the lower cooling nozzle 14.

  In addition, in this modification, although the form in which one injection port 14a is formed in the mounting jig 41 is described as an example, this need not be the case. For example, a plurality of injection holes 14 a may be formed in the pedestal portion 44 of the mounting jig 41. When a plurality of injection ports 14a of the lower cooling nozzle 14 are provided on the upper surface of the pedestal portion 44, the injection ports 14a are arranged at equal intervals along the circumferential direction of the workpiece 100 (the circumferential direction around the axis S1). .

  In addition, when the lower cooling nozzle 14 is provided on the mounting jig 41, the upper cooling nozzle 11 may or may not be provided.

  According to this modification, the lower cooling nozzle 14 injects the cooling gas from the lower side of the workpiece 100 toward the workpiece 100. According to this configuration, it is possible to supply more cooling gas toward the entire object to be processed 100 including the part close to the lower cooling nozzle in the object to be processed 100.

  (9) In the above-described embodiment and the modification, an example in which at least one of the upper cooling nozzle 11, the side cooling nozzles 12, 13 and the lower cooling nozzle 14 is provided as the cooling nozzle has been described. In this case, cooling nozzles other than the upper cooling nozzle 11, the side cooling nozzles 12 and 13, and the lower cooling nozzle 14 may be provided.

  (10) Further, the position of the upper cooling nozzle 11, the side cooling nozzles 12, 13, and the lower cooling nozzle 14 is not limited to the configuration in which the position is adjusted by the control of the control unit 53, but the position is adjusted by a manual operation by an operator. May be.

  (11) Further, in the above-described embodiments and modifications, other actuators such as a hydraulic cylinder may be used for at least one electric motor.

  The present invention can be widely applied as a heat treatment apparatus.

DESCRIPTION OF SYMBOLS 1 Heat processing apparatus 2 Heat processing chamber 4 Heating member 7 Position adjustment part 11 Upper cooling nozzle (cooling nozzle, proximity cooling nozzle)
12 Side cooling nozzle (cooling nozzle, proximity cooling nozzle)
13 Side cooling nozzle (cooling nozzle, proximity cooling nozzle)
14 Lower cooling nozzle (cooling nozzle, proximity cooling nozzle)
11a, 12a, 13a, 14a Injection port 41 Mounting jig (holding member)
42 Holding jig (holding member)
51 Mounting jig displacement mechanism (holding member displacement mechanism)
52 Holding jig / cooling nozzle displacement mechanism (holding member displacement mechanism, cooling nozzle displacement mechanism)
53 Control Unit 100 Object D1, D3 Distance D2 between Cooling Nozzle and Object D2 Distance between Heating Member and Object

Claims (11)

A heating member that heats a metal workpiece for heat treatment;
A cooling nozzle including an injection port arranged in a heat treatment chamber in which the heating member is arranged, and a cooling nozzle for injecting a cooling gas to the object to be processed for the heat treatment;
A position adjusting unit that adjusts a relative position between the ejection port and the object to be processed at the time of cooling the object to be processed;
A heat treatment apparatus comprising: The heat treatment apparatus according to claim 1,
A holding member for holding the object to be processed;
A heat treatment apparatus, wherein a mounting jig on which the workpiece is placed is provided as the holding member. The heat treatment apparatus according to claim 2,
A heat treatment apparatus, wherein a holding jig is provided as the holding member for suppressing displacement of the workpiece when the heat treatment is performed. A heat treatment apparatus according to claim 2 or claim 3, wherein
The heat treatment apparatus, wherein the position adjustment unit includes a holding member displacement mechanism that displaces the predetermined holding member with respect to the ejection port. The heat treatment apparatus according to any one of claims 1 to 4,
As the cooling nozzle, an upper cooling nozzle that jets the cooling gas from above the workpiece, a lower cooling nozzle that jets the cooling gas from below the workpiece, and the side of the workpiece in the horizontal direction At least one of the side cooling nozzles for injecting the cooling gas from the side is provided. The heat treatment apparatus according to any one of claims 1 to 5,
As the cooling nozzle, a proximity cooling nozzle is provided,
The proximity cooling nozzle is disposed so that a distance between the ejection port of the proximity cooling nozzle and the object to be processed is shorter than a distance between the heating member and the object to be processed when the object to be processed is cooled. The heat processing apparatus characterized by the above-mentioned. The heat treatment apparatus according to any one of claims 1 to 6,
The heat treatment apparatus, wherein the position adjusting unit includes a cooling nozzle displacement mechanism for displacing the injection port with respect to the object to be processed. The heat treatment apparatus according to any one of claims 1 to 7,
The heat treatment apparatus, wherein the position adjustment unit includes a control unit that controls a relative position between the injection port and the workpiece. A heating member that heats a metal workpiece for heat treatment;
A cooling nozzle including an injection port disposed in a heat treatment chamber in which the heating member is disposed, and a cooling nozzle for supplying a cooling gas to the object to be processed for the heat treatment;
A holding member disposed in the heat treatment chamber to hold the object to be processed and provided with the injection port;
A heat treatment apparatus comprising: The heat treatment apparatus according to claim 9,
As the holding member, at least one of a mounting jig for placing the object to be processed and a pressing jig for suppressing displacement of the object to be processed when the heat treatment is performed is provided. Heat treatment equipment. The heat treatment apparatus according to claim 10,
A position adjusting unit for adjusting a relative position between the ejection port and the object to be processed when the object to be processed is cooled;
The said position adjustment part adjusts the relative position of the said injection port and the said to-be-processed object by displacing the said pressing jig, The heat processing apparatus characterized by the above-mentioned.

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