Cooling device for heat treatment

Abstract

To provide a device that can secure a required cooling capacity for heated metal objects.SOLUTION: The present disclosure relates to a cooling device 100 for heat treatment that performs heat treatment by cooling heated metal objects 10 individually or as a whole. The cooling device includes: a chamber 200 within which multiple objects are disposed; an individual cooling unit 300 configured to individually cover each object and to spray a cooling medium onto the object; and a driving unit 700 configured to be provided on the chamber and to move the individual cooling unit in the vertical direction. With such a configuration, it is possible to secure a required cooling capacity.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cooling device for heat treatment, and more particularly, to a cooling device for heat treatment that individually cools or cools an entire heated metal object for heat treatment.

Background Art

[0002] A cooling device for heat treatment of metal products is used for the purpose of controlling the mechanical properties of metals by utilizing the phase transformation characteristics of metal products. The cooling device mainly uses oil or high-pressure gas fluid with excellent cooling ability as a cooling medium for the purpose of rapid cooling and cooling control of products.

[0003] Recently, there has been a tendency to use more gas as a cooling medium from the aspects of environmental friendliness and ease of controlling the cooling medium. However, there are limitations in overall uniform cooling control for stacked processed products of two or more stages (hereinafter, one stage is referred to as 2D stacking, and two or more stages are referred to as 3D stacking), and a high-pressure gas supply line is required to ensure cooling ability.

[0004] Korean Registered Patent No. 10-2302307 (hereinafter referred to as "Patent Document 1") discloses a method and apparatus for thermally scientifically hardening a workpiece.

[0005] The above Patent Document 1 discloses an apparatus including two or more cementing chambers capable of directly heating a workpiece by thermal radiation, a cooling device, and a transmission system.

[0006] The two or more cementing chambers, cooling device, and transmission system disclosed in the above Patent Document 1 enable rapid heating of the workpiece. In order to prevent complicated post-machining due to the generation of severe thermal distortion of the workpiece stacked in 3D, 2D stacking in which the workpieces are arranged side by side is used so that 30 to 100% of the surface of the workpiece can be heated by the direct thermal radiation of the heating device, and a method for preventing severe thermal distortion of the workpiece is disclosed.

[0007] In addition, Korean Registered Patent Publication No. 10-2395488 (hereinafter referred to as "Patent Document 2") discloses a multi-chamber furnace for vacuum carburizing and quenching of gears, shafts, rings, and similar workpieces.

[0008] The multi-chamber furnace of Patent Document 2 includes two or more process chambers (connected in parallel) by continuous supply of individual workpieces arranged in a vacuum space and configured in a vertical or horizontal arrangement, and an integrated transfer chamber having a loading and unloading system that can cooperate with the individual process chambers through doors provided at the ends of the process chambers, and is configured to include facilities for individual gas quenching of workpieces within the furnace operation cycle in an unloading lock. In addition, the device for individual gas quenching of workpieces is composed of a system of gas nozzles for pressurizing the flow of cooling gas and a two-part nozzle collector including a base. Thereby, a method for minimizing thermal distortion when cooling individual workpieces after heat treatment is disclosed.

[0009] However, these conventional cooling devices have limitations in scalability depending on the shape of the product or limitations in the structure of the cooling chamber depending on the structural form of the heating chamber, and there is a problem that it is difficult to achieve the intended uniform cooling control for various loading forms considering the quantity of processed products and 3D stacking, etc.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0011] The present invention was devised to solve the above problems, and an object thereof is to provide a cooling device for heat treatment that can secure the required cooling capacity by individually cooling or collectively cooling a heated metal object to be heat-treated.

Means for Solving the Problems

[0012] In order to achieve the above object, a cooling device for heat treatment according to a preferred embodiment of the present invention may include a chamber in which a plurality of objects are arranged, an individual cooling unit that individually covers the objects and injects a cooling medium onto the objects, and a drive unit provided in the chamber that moves the individual cooling unit in the vertical direction.

[0013] Here, the individual cooling unit may include a cover portion that has a hollow interior so that the object is arranged therein and is open on one side, a cooling medium supply pipe that is provided on the drive unit and moves in the vertical direction and is fastened to the other side of the cover portion to supply a cooling medium into the cover portion, and a cooling medium supply unit that is connected to the cooling medium supply pipe and supplies a cooling medium.

[0014] Further, the cover portion may be formed in a cylindrical shape that is open on one side, formed in a double-wall shape so that a cooling medium flows into the interior, a cover portion body in which an outer wall communicates with the cooling medium supply pipe, and a nozzle portion that communicates with an inner wall of the cover portion body and protrudes inside the cover portion body to inject a cooling medium onto the object.

[0015] Here, the nozzle portion may include a first nozzle portion formed on an inner peripheral surface on the upper side of the cover portion body, and a second nozzle portion formed on an inner peripheral surface in the circumferential direction of the cover portion body and formed to incline upward.

[0016] With such a configuration, a plurality of objects are arranged on a jig tray in a state of being seated on respective object jigs, and after the jig tray is loaded into the chamber via a transfer jig, it may be seated on a support block provided in the chamber.

[0017] Further, the cooling device for heat treatment of the present invention may further include an object rotating unit that is provided in the chamber and rotates the object jig after supporting the object jig separately from the jig tray when the jig tray is seated on the support block.

[0018] More specifically, the object rotating unit may include a rotating shaft that penetrates the jig tray and is fastened to the object jig, and a rotation driving unit that rotates the rotating shaft so as to rotate the object jig.

[0019] With such a configuration, after the jig tray descends and the object jig is supported by the rotating shaft and disposed separately from the jig tray, the cover portion descends and the object is accommodated therein, and then the rotating shaft rotates, so that the cooling medium may be injected through the nozzle portion while the object is rotating.

[0020] Further, the cooling medium supply unit may include a cooling medium storage tank in which the cooling medium is stored, a cooling medium supply line connecting the cooling medium storage tank and the chamber, and a flexible supply pipe having one end fastened to the chamber and connected to the cooling medium supply line and the other end connected to the cooling medium supply pipe, the length of which is variable corresponding to the movement of the cooling medium supply pipe.

[0021] As an example, when the cooling medium is a gas, the cooling medium supply unit may include a cooling medium recovery tank that recovers the cooling medium supplied to the chamber, and a cooling medium compressor that compresses the cooling medium stored in the cooling medium recovery tank and supplies it to the cooling medium storage tank.

[0022] As another example, when the cooling medium is oil, the cooling medium supply unit may include a cooling medium supply pump that supplies the cooling medium stored in the cooling medium storage tank to the cooling medium supply pipe, a cooling medium recovery tank to which the cooling medium supplied to the chamber is recovered, a cooling medium return pump that supplies the cooling medium stored in the cooling medium recovery tank to the cooling medium storage tank, and a cooling medium cooling unit that cools the oil stored in the cooling medium recovery tank.

[0023] Furthermore, the heat treatment cooling device of the present invention may further include a common cooling unit that injects a cooling medium into the chamber when the cooling medium is a gas.

[0024] More specifically, the common cooling unit may be provided inside the chamber and may include a common cooling medium injection nozzle that injects a cooling medium into the chamber and a common cooling medium supply line that connects the cooling medium storage tank and the common cooling medium injection nozzle.

Advantages of the Invention

[0025] According to the heat treatment cooling device of the present invention, by individually cooling or overall cooling the heated metal object, an effect of ensuring the required cooling capacity can be obtained.

[0026] Also, according to the present invention, since the object can be cooled after being separated from the base jig, the total amount of heat to be cooled is reduced, and an effect of being able to cool more quickly and effectively can be obtained.

[0027] Also, according to the present invention, since nitrogen gas or oil is used as the cooling medium, an effect of reducing costs and preventing safety accidents can be obtained without using high-risk and high-cost gases such as hydrogen and helium.

[0028] Furthermore, according to the present invention, by supplying at a sufficient flow rate even under the condition of a low supply pressure of the cooling medium to ensure the required cooling capacity, a desired cooling effect can be obtained.

Brief Description of the Drawings

[0029]

Figure 1

Figure 2

Figure 3

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Figure 5

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Figure 11

Embodiments for Carrying Out the Invention

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0031] Since the present invention can be subjected to various modifications and can have various embodiments, specific embodiments are illustrated in the drawings and are specifically described in the detailed description. This is not intended to limit the present invention to the specific embodiments, but should be construed as including all modifications, equivalents, or alternatives included in the spirit and technical scope of the present invention.

[0032] The terms used in this application are used only for the purpose of describing specific embodiments and are not intended to limit the present invention. Singular expressions can include plural expressions unless the context clearly indicates otherwise.

[0033] Unless otherwise defined, all terms used herein, including technical and scientific terms, can have the same meaning as commonly understood by those having ordinary knowledge in the technical field to which the present invention belongs. Terms defined as in a commonly used dictionary can be construed to have a meaning consistent with the meaning in the context of the related art, and are not construed as having an ideal or overly formal meaning unless clearly defined in this application.

[0034] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

[0035] Figs. 1 and 2 are a perspective view and a cross-sectional view schematically showing a cooling device for heat treatment according to an embodiment of the present invention. Figs. 3 and 4 are a perspective view and a cross-sectional view schematically showing a cover portion and an object in the cooling device for heat treatment in an extracted manner. Fig. 5 is a cross-sectional view schematically showing a state in which individual cooling portions individually cover an object in the cooling device for heat treatment. Fig. 6 is an enlarged view schematically showing an extracted A region of Fig. 5. Further, Fig. 7 is a view schematically showing a state in which a configuration for supplying a cooling medium to a chamber is connected in the cooling device for heat treatment. Figs. 8 and 9 are views schematically showing supply lines of the cooling medium for individual cooling and common cooling. Further, Fig. 10 is a view schematically showing a configuration for supplying oil as a cooling medium to a chamber in the cooling device for heat treatment. Fig. 11 is a perspective view schematically showing an example of a heating furnace for heat-treating an object.

[0036] Referring to Figs. 1 to 11, a cooling device 100 for heat treatment according to an embodiment of the present invention includes a chamber 200 in which a plurality of objects 10 are arranged, an individual cooling portion 300 that individually covers the object 10 and injects a cooling medium onto the object 10, and a drive portion 700 provided in the chamber 200 that moves the individual cooling portion 300 in the vertical direction.

[0037] Here, the chamber 200 is formed to have a hollow interior in which a plurality of the objects 10 are seated and the individual cooling portion 300 for cooling the object 10 is provided. Also, one side of the chamber 200 is formed to be open so that a plurality of the objects 10 can be loaded into or withdrawn from the interior. Of course, the open side of the chamber 200 may be closed by a separate door portion (not shown).

[0038] As an example, after being heat-treated in the heating furnace 1 shown in FIG. 11, the object 10 may be loaded into the chamber 200 via a transfer chamber (not shown). At this time, the transfer chamber may be disposed in close contact with one open side of the chamber 200, and cooling may be performed with the one open side of the chamber 200 being sealed, or the transfer chamber may be separated from the chamber 200, and cooling may be performed after the door part closes the one open side of the chamber 200.

[0039] Further, the plurality of objects 10 may be disposed on the jig tray 20 in a state of being seated on respective object jigs 30, and the jig tray 20 may be provided so as to be loadable into or pullable out of the chamber 200 via a transfer jig 40 provided in the transfer chamber. Here, the transfer jig 40 may be composed of a telescope. That is, via the telescope provided in the transfer chamber, the object 10 heated in the heating furnace 1 is pulled out and loaded into the transfer chamber, and after moving to the chamber 200, the object 10 may be loaded into the chamber 200 via the telescope.

[0040] At this time, a support block 210 is provided at the inner bottom of the chamber 200, and the jig tray 20 is seated on the support block 210 and the object 10 is cooled. Of course, cooling may be performed with the jig tray 20 being disposed on the transfer jig 40.

[0041] The individual cooling unit 300 is configured to individually cool the plurality of objects 10 by spraying a cooling medium onto the objects 10 after individually covering the plurality of objects 10 loaded into the chamber 200.

[0042] Therefore, the individual cooling unit 300 has a hollow interior for arranging the object 10 therein, and includes a cover part 310 with one side open, a cooling medium supply pipe 320 provided on the driving unit 700 and moving in the vertical direction, fastened to the other side of the cover part 310 and supplying a cooling medium into the cover part 310, and cooling medium supply parts 510, 520 connected to the cooling medium supply pipe 320 and supplying a cooling medium.

[0043] That is, the individual cooling unit 300 is configured to be able to cool the plurality of objects 10 individually by supplying a cooling medium into the cover part 310 after the cover part 310 individually covers the object 10.

[0044] As an example, as shown in FIGS. 3 and 4, the object 10 may be provided as a pinion gear. At this time, the cover part 310 may be formed in a form capable of accommodating the circular pinion gear.

[0045] More specifically, the cover part 310 is formed in a cylindrical shape with one side open, formed in a double-wall shape so that a cooling medium flows into the interior, a cover part body 311 with an outer wall communicating with the cooling medium supply pipe 320, and a nozzle part 312, 313 communicating with the inner wall of the cover part body 311 and protruding inside the cover part body 311 to inject a cooling medium onto the object 10.

[0046] Here, the nozzle parts 312, 313 are formed on the upper inner circumferential surface of the cover part body 311, and include a first nozzle part 312 that injects a cooling medium onto the upper side of the object 10 provided inside the cover part body 311, and a second nozzle part 313 that is formed on the inner circumferential surface in the circumferential direction of the cover part body 311, formed to incline upward, and injects a cooling medium onto the lower side of the object 10 provided inside the cover part body 311.

[0047] That is, a plurality of the first nozzle portions 312 and the second nozzle portions 313 are provided on the inner peripheral surface of the cover portion body 311, and a cooling medium is injected along the upper and lower outer peripheral surfaces of the object 10 accommodated inside the cover portion body 311, so that the object 10 can be cooled as a whole in the same manner.

[0048] In addition, since the cover portions 310 are arranged for each of the objects 10 and the objects 10 can be cooled individually, all of them are cooled in the same manner regardless of their positions arranged inside the chamber 200, so that the uniformity of the cooling quality of the objects 10 can be ensured.

[0049] Here, the drive unit 700 may be provided outside the chamber 200 and may be provided as an actuator in which a linearly moving rod 710 penetrates the chamber 200.

[0050] In addition, the cooling medium supply pipe 320 may be fastened to the end of the rod 710, connected to communicate with the plurality of cover portions 310, and connected to the cooling medium supply portions 510 and 520.

[0051] That is, the cooling medium supply pipe 320 has a hollow interior through which the cooling medium flows, and when the cooling medium is supplied from the cooling medium supply portions 510 and 520, it is configured to branch and supply the cooling medium to each of the cover portions 310.

[0052] With such a configuration, when the drive unit 700 operates and the rod 710 moves, correspondingly, the cooling medium supply pipe 320 and the cover portions 310 both move in the vertical direction. When the cooling medium is supplied to the cooling medium supply portions 510 and 520 with the object 10 arranged inside the cover portions 310, the cooling medium is supplied to each of the plurality of cover portions 310 through the cooling medium supply pipe 320, so that the objects 10 can be cooled individually.

[0053] Further, the present invention may further include an object rotating unit 600 that rotates the object 10 so that cooling is performed more uniformly.

[0054] More specifically, the object rotating unit 600 may be provided in the chamber 200 and configured to rotate the object jig 30 after separating and supporting the object jig 30 from the jig tray 20 when the jig tray 20 is seated on the support block 210.

[0055] For this purpose, the object rotating unit 600 may include a rotating shaft 610 that passes through the jig tray 20 and is fastened to the object jig 30, and a rotation driving unit 620 that rotates the rotating shaft 610 so as to rotate the object jig 30. Here, the jig tray 20 is formed with a shaft through-hole 21 so that the rotating shaft 610 is inserted into a portion where the object jig 30 is disposed.

[0056] Further, the rotating shaft 610 is disposed so as to pass through the chamber 200, the object jig 30 is coupled to one end portion disposed inside the chamber 200 through the chamber 200, and the other end portion disposed outside the chamber 200 is rotated by the rotation driving unit 620. At this time, the chamber 200 may be provided with a bearing 220 so as to rotatably support the rotating shaft 610.

[0057] Further, the same number of rotating shafts 610 as the cover portions 310 are provided and are provided in the chamber 200 so as to be concentric with the cover portions 310.

[0058] Further, the rotational drive unit 620 may include a driven gear 621 provided at the other end of the rotary shaft 610, and a drive gear 622 that rotates by a drive motor 623 to rotate the driven gear 621. Further, the driven gears 621 provided at the other end of the rotary shaft 610 may be meshed with each other, and when one driven gear 621 is rotated by the drive gear 622, all the rotary shafts 610 may be provided to rotate together.

[0059] The cooling medium supply units 510 and 520 are configured to be connected to the cooling medium supply pipe 320 to supply a cooling medium.

[0060] Further, in the present invention, gas or oil can be used as the cooling medium that is supplied to the cover portion 310 and cools the object 10.

[0061] As an example, when gas is used as the cooling medium, the cooling medium supply unit 510 includes a cooling medium storage tank 511 in which the cooling medium is stored, a cooling medium supply line 512 that connects the cooling medium storage tank 511 and the chamber 200, and one side end is fastened to the chamber 200 and connected to the cooling medium supply line 512, and the other side end is connected to the cooling medium supply pipe 320, and a flexible supply pipe 513 whose length is variable corresponding to the movement of the cooling medium supply pipe 320.

[0062] Further, the cooling medium supply unit 510 may include a cooling medium recovery tank 514 in which the cooling medium supplied to the chamber 200 is recovered, and a cooling medium compressor 515 that compresses the cooling medium stored in the cooling medium recovery tank 514 and supplies it to the cooling medium storage tank 511. Further, pipes through which the cooling medium flows by connecting each component may be provided with valves for opening and closing the pipes.

[0063] With such a configuration, when individually cooling the object 10 through the cover portion 310, as shown in FIG. 8, when the cooling medium stored in the cooling medium storage tank 511 is supplied to the flexible supply pipe 513 provided inside the chamber 200 through the cooling medium supply line 512, the cooling medium is supplied to the cover portion 310 through the cooling medium supply pipe 320 to cool the object 10. Further, the cooling medium that has cooled the object 10 is recovered into the cooling medium recovery tank 514, compressed by the cooling medium compressor 515, and then supplied to and recovered in the cooling medium storage tank 511.

[0064] Further, the chamber 200 may further include a vent portion 230 that discharges the cooling medium filled inside to the outside.

[0065] The vent portion 230 can be opened when the pressure exceeds a certain pressure in order to prevent the overpressure cooling medium from flowing into the chamber 200, and can operate to lower the pressure inside the chamber 200.

[0066] Alternatively, the vent portion 230 may be opened at the initial stage of supplying the cooling medium to the chamber 200 and may be opened until the inside of the chamber 200 is completely replaced with the cooling medium. Thereby, it is possible to prevent gas or foreign matter other than the cooling medium from being mixed into the circulating cooling medium.

[0067] In addition, the heat treatment cooling device 100 of the present invention may further include a common cooling portion 400 that injects a cooling medium into the chamber 200 when the cooling medium is a gas.

[0068] That is, the common cooling portion 400 may not be configured to directly inject the cooling medium into each of the objects 10, but may be configured to inject the cooling medium into the chamber 200 to cool the objects 10 provided inside the chamber 200 as a whole.

[0069] Therefore, the common cooling unit 400 may be provided inside the chamber 200 and may include a common cooling medium injection nozzle 410 that injects a cooling medium inside the chamber 200, and a common cooling medium supply line 420 that connects the cooling medium storage tank 511 and the common cooling medium injection nozzle 410.

[0070] With such a configuration, when injecting a cooling medium inside the chamber 200, as shown in FIG. 9, the cooling medium supply line 512 is closed, and when the cooling medium stored in the cooling medium storage tank 511 is supplied to the common cooling medium injection nozzle 410 provided inside the chamber 200 via the common cooling medium supply line 420, the cooling medium is injected inside the chamber 200 via the common cooling medium injection nozzle 410, and the object 10 is cooled in common. Further, the cooling medium that has cooled the object 10 can be recovered in the cooling medium recovery tank 514, compressed by the cooling medium compressor 515, and then supplied to and recovered in the cooling medium storage tank 511.

[0071] Further, the cooling medium supply pipe 320 may be configured to be separable from the rod 710 of the drive unit 700. That is, when injecting and cooling a cooling medium inside the chamber 200 via the common cooling unit 400, the cooling medium supply pipe 320 may be separated from the rod 710 so as not to be interfered with by the cooling medium supply pipe 320 and the cover unit 310, and then the cooling medium may be injected inside the chamber 200.

[0072] As another example, when using oil as the cooling medium, referring to FIG. 10, the cooling medium supply unit 520 may include a cooling medium storage tank 521 in which the cooling medium is stored, a cooling medium supply line 522 connecting the cooling medium storage tank 521 and the chamber 200, a cooling medium supply pump 524 for supplying the cooling medium stored in the cooling medium storage tank 521 to the cooling medium supply pipe 320, and a flexible supply pipe 523 having one end fastened to the chamber 200 and connected to the cooling medium supply line 522 and the other end connected to the cooling medium supply pipe 320, the length of which is variable corresponding to the movement of the cooling medium supply pipe 320.

[0073] Further, the cooling medium supply unit 520 may include a cooling medium recovery tank 525 for recovering the cooling medium supplied to the chamber 200, a cooling medium return pump 526 for supplying the cooling medium stored in the cooling medium recovery tank 525 to the cooling medium storage tank 521, and a cooling medium cooling unit 527 for cooling the oil stored in the cooling medium recovery tank 525. Here, the cooling medium cooling unit 527 may be provided as a chiller.

[0074] With such a configuration, when using oil as the cooling medium, as shown in FIG. 10, when the cooling medium supply pump 524 operates, the cooling medium stored in the cooling medium storage tank 511 is supplied to the flexible supply pipe 513 provided inside the chamber 200 through the cooling medium supply line 512, and then the cooling medium is supplied to the cover part 310 through the cooling medium supply pipe 320 to cool the object 10. Also, the cooling medium that has cooled the object 10 is recovered in the cooling medium recovery tank 514, and when the cooling medium return pump 526 operates, it can be recovered in the cooling medium storage tank 511. Further, since the cooling medium recovered in the cooling medium storage tank 511 is in a heated state, the cooling medium stored in the cooling medium storage tank 511 can be cooled through the cooling medium cooling unit 527.

[0075] As described above, the present invention has been described in detail through specific embodiments. However, this is for specifically describing the present invention, and the present invention is not limited thereto. It is obvious that the present invention can be modified and improved by those with ordinary knowledge in the art within the technical idea of the present invention.

[0076] Any simple changes or modifications of the present invention all belong to the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

Explanation of Reference Numerals

[0077] 10: Object 20: Fixture Tray 21: Shaft Through-Hole 30: Object Fixture 40: Transfer Fixture 100: Cooling Device for Heat Treatment 200: Chamber 210: Support Block 220: Bearing 230: Vent Port 300: Individual Cooling Unit 310: Cover Unit 311: Cover Unit Body 312: First Nozzle Unit 313: Second Nozzle Unit 320: Cooling Medium Supply Pipe 400: Common Cooling Unit 410: Common Cooling Medium Injection Nozzle 420: Common Cooling Medium Supply Line 510: Cooling Medium Supply Unit 511: Cooling Medium Storage Tank 512: Cooling Medium Supply Line 513: Flexible Supply Pipe 514: Cooling Medium Recovery Tank 515: Cooling Medium Compressor 520: Cooling Medium Supply Unit 521: Cooling Medium Storage Tank 522: Cooling Medium Supply Line 523: Flexible Supply Pipe 524: Cooling Medium Supply Pump 525: Cooling Medium Recovery Tank 526: Cooling Medium Return Pump 527: Cooling Medium Cooling Unit 600: Object Rotation Unit 610: Rotation Shaft 620: Rotation Drive Unit 621: Driven Gear 622: Driving Gear 623: Driving Motor 700: Driving unit 710: Rod

Claims

1. A chamber in which a plurality of objects are arranged; An individual cooling unit that individually covers the objects and injects a cooling medium onto the objects; A drive unit provided in the chamber for moving the individual cooling unit in the vertical direction; comprising; A plurality of objects are arranged on a jig tray in a state where each object is seated on its respective object jig. After the jig tray is loaded into the chamber via a transfer jig, it is seated on a support block provided in the chamber. An object rotating unit provided in the chamber that, when the jig tray is seated on the support block, separates and supports the object jig from the jig tray and then rotates it. A heat treatment cooling device further comprising.

2. The individual cooling unit is: A cover part having a hollow interior such that the object is arranged therein and having one side open; A cooling medium supply pipe provided on the drive unit and moving in the vertical direction, fastened to the other side of the cover part and supplying a cooling medium into the interior of the cover part; A cooling medium supply unit connected to the cooling medium supply pipe for supplying a cooling medium; The heat treatment cooling device according to claim 1, characterized by comprising.

3. The cover part is: Formed in a cylindrical shape with one side open, formed in a double-wall shape such that a cooling medium flows into the interior, and having an outer wall communicating with the cooling medium supply pipe; a cover part body; A nozzle part communicating with the inner wall of the cover part body, protruding inside the cover part body, and injecting a cooling medium onto the object; The heat treatment cooling device according to claim 2, characterized by comprising.

4. The nozzle part is: A first nozzle part formed on the inner peripheral surface above the cover part body; A second nozzle part formed on the inner peripheral surface in the circumferential direction of the cover part body and formed to incline upward; The heat treatment cooling device according to claim 3, characterized by comprising.

5. The object rotating unit is: A rotating shaft that penetrates the jig tray and is fastened to the object jig; A rotation drive unit that rotates the rotating shaft so as to rotate the object jig; The heat treatment cooling device according to claim 4, characterized by comprising.

6. After the jig tray descends and the object jig is supported by the rotating shaft and is disposed at a distance from the jig tray, the cover part descends and the object is accommodated inside, and the rotating shaft rotates, so that the cooling medium is jetted through the nozzle part while the object is rotating. The cooling device for heat treatment according to claim 5, characterized in that.

7. The cooling medium supply unit A cooling medium storage tank in which the cooling medium is stored, A cooling medium supply line connecting the cooling medium storage tank and the chamber, A flexible supply pipe having one side end fastened to the chamber and connected to the cooling medium supply line, and the other side end connected to the cooling medium supply pipe, and having a variable length corresponding to the movement of the cooling medium supply pipe, The cooling device for heat treatment according to claim 2, characterized in that it includes.

8. When the cooling medium is gas, the cooling medium supply unit A cooling medium recovery tank for recovering the cooling medium supplied to the chamber, A cooling medium compressor for compressing the cooling medium stored in the cooling medium recovery tank and supplying it to the cooling medium storage tank, The cooling device for heat treatment according to claim 7, characterized in that it includes.

9. When the cooling medium is oil, the cooling medium supply unit A cooling medium supply pump for supplying the cooling medium stored in the cooling medium storage tank to the cooling medium supply pipe, A cooling medium recovery tank for recovering the cooling medium supplied to the chamber, A cooling medium return pump for supplying the cooling medium stored in the cooling medium recovery tank to the cooling medium storage tank, A cooling medium cooling unit for cooling the oil stored in the cooling medium recovery tank, The cooling device for heat treatment according to claim 7, characterized in that it includes.

10. When the cooling medium is gas, a common cooling unit for injecting the cooling medium into the chamber The cooling device for heat treatment according to claim 7, further characterized by including.

11. The common cooling unit A common cooling medium injection nozzle provided inside the chamber for injecting the cooling medium into the chamber, A common cooling medium supply line connecting the cooling medium storage tank and the common cooling medium injection nozzle, The cooling device for heat treatment according to claim 10, characterized in that it includes.

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