A workpiece residual stress heat treatment equipment

Abstract

This invention provides a heat treatment device for residual stress in workpieces, relating to the field of heat treatment technology, to solve the technical problem of poor uniformity in residual stress distribution in workpieces. The device includes a frame, a cooling control unit, a temperature measuring device, and a controller. The cooling control unit includes a gas supply device and multiple jet units connected to the gas supply device. Each jet unit is movably mounted on the frame via a movable module. Each jet unit includes a connected conical hose and a nozzle, with the nozzle facing the workpiece. The nozzle includes a tube body, a telescopic device, and two opposing ear plates. The tube body is formed by winding a wall panel, with overlapping portions at both ends of the wall panel. The two ear plates are respectively located on the outer wall surface of the wall panel near both ends. The telescopic device includes a first lead screw nut, a first lead screw, and a first motor drivenly connected to the first lead screw. The first motor is located on one ear plate, and the first lead screw nut is located on the first lead screw and abuts against the side of the other ear plate opposite to the first motor. This device can improve the uniformity of residual stress distribution.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology, and in particular to a heat treatment device for residual stress in workpieces. Background Technology

[0002] The lifespan of keypad forgings in aero-engines and gas turbines determines the lifespan of the entire machine. However, due to their non-uniform cross-section structure, disc forgings generate uneven residual stress during heat treatment, especially during cooling, which significantly reduces their fatigue life.

[0003] In related technologies, different cooling methods are selected according to the cooling rate during the heat treatment cooling process, such as furnace cooling, air cooling, oil cooling, water cooling, etc. However, these cooling methods are all aimed at controlling the cooling of the entire disc forging, which makes it difficult to improve the uniformity of the microstructure and properties of the disc forging and to bring out the performance potential of the metal material. Summary of the Invention

[0004] The purpose of this invention is to provide a heat treatment device for residual stress in workpieces, so as to solve the technical problem of poor uniformity of residual stress distribution during heat treatment of workpieces.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] This invention provides a heat treatment device for residual stress in workpieces, including a frame, a cooling control device, a temperature measuring device, and a controller. The cooling control device includes a gas supply device and multiple jet units connected to the gas supply device. Each of the jet units is movably mounted on the frame via a movable module.

[0007] The jet unit includes a connected tapered hose and a nozzle, the cross-section of which increases along the direction close to the nozzle, and the nozzle facing the workpiece;

[0008] The nozzle includes a pipe body, a telescopic device, and two opposing lugs. The pipe body is formed by winding a wall panel, and the two ends of the wall panel have overlapping portions. The two lugs are respectively disposed on the outer wall surface of the wall panel near both ends.

[0009] The telescopic device includes a first lead screw nut, a first lead screw, and a first motor that is drivenly connected to the first lead screw. The first motor is disposed on one of the ear plates, and the first lead screw nut is disposed on the first lead screw and abuts against the side of another ear plate opposite to the first motor.

[0010] The temperature measuring device is used to acquire the temperature information of the workpiece, and the temperature measuring device, the moving module and the first motor are all communicatively connected to the controller.

[0011] According to at least one embodiment of the present invention, the jet unit further includes an elastic collar, and the tapered hose is sleeved on the outer wall surface of the tube body through the elastic collar.

[0012] According to at least one embodiment of the present invention, the nozzle further includes a plurality of guide rods, one end of which is fixedly disposed on one of the ear plates, and the other end of which passes through a guide hole on another ear plate.

[0013] According to at least one embodiment of the present invention, the moving module includes a plurality of first tracks extending along a first direction and a plurality of first moving parts movably disposed on the first tracks;

[0014] Each of the jet units is mounted on a corresponding first moving part, which is communicatively connected to the controller.

[0015] According to at least one embodiment of the present invention, the moving module further includes two second rails extending along a second direction and a plurality of second moving parts movably disposed on each of the second rails; wherein the second direction is perpendicular to the first direction;

[0016] Both ends of each of the first wire rails are respectively located on the corresponding second moving parts on the two second wire rails, and the second moving parts are communicatively connected to the controller.

[0017] According to at least one embodiment of the present invention, the cooling control device further includes a plurality of interconnected flow valves and bellows, and each of the jet units is connected to the air supply device through a corresponding flow valve and bellows.

[0018] According to at least one embodiment of the present invention, the number of cooling control devices is two, and the two cooling control devices are respectively disposed on both sides of the workpiece.

[0019] According to at least one embodiment of the present invention, the heat treatment equipment further includes a lifting device disposed in the middle part of the frame, the lifting device being used to position the workpiece in the middle position between the two cooling control devices.

[0020] According to at least one embodiment of the present invention, the heat treatment equipment further includes a transfer device, a heating furnace, and a track disposed between the heating furnace and the frame, wherein the heating furnace is used to heat the workpiece;

[0021] The transfer device is movably mounted on the track and is used to transfer the workpiece in the heating furnace to the corresponding position of the controlled cooling device.

[0022] According to at least one embodiment of the present invention, the transfer device includes a base plate, a track plate, a lifting mechanism, and a platform for carrying the workpiece, wherein the lifting mechanism is disposed between the base plate and the track plate;

[0023] The platform is movably mounted on the track plate via track wheels, and the base plate is mounted on the track via rollers.

[0024] In one or more technical solutions provided in the exemplary embodiments of the present invention, at least one of the following beneficial effects can be achieved.

[0025] The residual stress heat treatment equipment for workpieces according to an exemplary embodiment of the present invention includes a frame, a cooling control device, a temperature measuring device, and a controller. The cooling control device includes a gas supply device and multiple jet units connected to the gas supply device. The jet units can move their positions via a moving module. When the temperature measuring device detects the temperature distribution information of the workpiece, the controller controls the moving module to move the jet units to the corresponding parts of the workpiece to be cooled according to the temperature information. This allows for zoned cooling based on the different temperatures of different parts of the workpiece, thereby effectively regulating the residual stress of the workpiece and improving the consistency of the residual stress distribution.

[0026] Furthermore, the jet unit includes a connected conical hose and a nozzle. The nozzle is located at the large end of the conical hose, i.e., in the direction away from the air supply device. The conical hose has a flared opening, and a variable-diameter nozzle is connected to the opening, thereby expanding or shrinking the gas nozzle to control the size of each cooling zone and more precisely control the residual stress at various locations on the workpiece. Specifically, the tube body is formed by winding a wall panel, and the two ends of the wall panel have overlapping portions. By adjusting the distance between two ear plates located on the outer wall of the wall panel, the overlapping portion can be increased or decreased to achieve the variable diameter of the tube body. The two ear plates are connected by a telescopic device, specifically a first lead screw and a first nut that mates with the lead screw. A first motor rotates the first lead screw, thereby changing the position of the first nut on the first lead screw, and thus changing the distance between the two ear plates. The first motor is communicatively connected to a controller, which can control the required diameter of the tube body according to the actual size and temperature of the part of the workpiece to be cooled. The telescopic device uses a lead screw and lead screw nut motion mechanism to achieve higher control precision. Based on this, by coordinating the moving module and the variable diameter nozzle, the residual stress in various parts of the workpiece can be precisely cooled and controlled, thereby achieving the consistency of the overall performance of the workpiece and improving its fatigue life. Attached Figure Description

[0027] The accompanying drawings illustrate exemplary embodiments of the invention and, together with the description thereof, serve to explain the principles of the invention. These drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification.

[0028] Figure 1 This is a schematic front view of a heat treatment apparatus according to an embodiment of the present invention;

[0029] Figure 2 This is a partial structural schematic diagram of a cooling control device according to an embodiment of the present invention;

[0030] Figure 3 This is an isometric structural diagram of a mobile module according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the jet unit according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the nozzle structure according to an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of a transfer device according to an embodiment of the present invention.

[0034] Figure label:

[0035] 10. Cooling control device; 11. Flow divider; 12. Flow valve; 13. Bellows; 14. Tapered hose; 15. Nozzle; 151. Wall panel; 152. First motor; 153. Ear plate; 154. Guide rod; 155. First lead screw; 156. First nut; 161. First lead rail; 162. Second lead rail; 163. First moving part; 164. Second moving part;

[0036] 20. Gas supply device;

[0037] 30. Transfer device; 31. Platform; 32. Track plate; 331. First rod; 332. Second rod; 333. Third rod; 334. Fourth rod; 34. Second lead screw; 35. Second motor; 36. Pin; 37. Base plate;

[0038] 40. Heating furnace;

[0039] 50. Controller;

[0040] 60. Workpiece. Detailed Implementation

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] In related technologies, the cooling process of heat treatment of workpieces cannot be controlled according to the structure and temperature distribution of the workpieces, resulting in poor consistency of residual stress distribution and difficulty in fully realizing the performance potential of metallic materials.

[0043] To address the aforementioned problems, the exemplary embodiment of this invention provides an air jet unit that can control the air jet unit to move to the corresponding location based on the workpiece's temperature distribution information, and finely control the cooling position and size by superimposing changes in the nozzle diameter, forming a closed-loop control. This achieves consistent residual stress distribution in the workpiece and improves its service life.

[0044] It should be noted that the heat treatment equipment provided in the exemplary embodiments of the present invention is applicable not only to forgings, but also to other workpieces that require heat treatment, such as castings.

[0045] Example 1

[0046] Figure 1 This is a schematic front view of a heat treatment apparatus according to an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of a cooling control device according to an embodiment of the present invention. The residual stress heat treatment equipment for workpiece 60 provided in an exemplary embodiment of the present invention includes a frame, a cooling control device 10, a temperature measuring device, and a controller 50. The cooling control device 10 includes a gas supply device 20 and multiple jet units connected to the gas supply device 20. Each jet unit is movably mounted on the frame via a movable module. Each jet unit includes a connected conical hose 14 and a nozzle 15. Along the direction close to the nozzle 15, the cross-section of the conical hose 14 increases, and the nozzle 15 faces the workpiece 60. The nozzle 15 includes a tube body, a telescopic device, and two opposing ear plates 153. The tube body is wound around a wall plate 151. The wall panel 151 has overlapping portions at both ends, and two ear plates 153 are respectively disposed on the outer wall surface of the wall panel 151 near both ends; the telescopic device includes a first nut 156, a first lead screw 155 and a first motor 152 that is drivenly connected to the first lead screw 155. The first motor 152 is disposed on one ear plate 153, and the first nut 156 is disposed on the first lead screw 155 and abuts against the side of the other ear plate 153 away from the first motor 152; the temperature measuring device is used to acquire the temperature information of the workpiece 60, and the temperature measuring device, the moving module and the first motor 152 are all communicatively connected to the controller 50.

[0047] In practical applications, workpiece 60, such as a disc forging, requires controlled cooling after heat treatment to obtain more uniform residual stress, improve its microstructure and batch stability. The heated workpiece 60 is placed in a frame, with the controlled cooling device 10 located on one side of the workpiece 60, so that all or part of the nozzles 15 in the air jet units face the surface of the workpiece 60 (e.g., the circular end face of a circular disc forging). Cooling is achieved by blowing air at a certain pressure onto the corresponding parts of the workpiece 60. When the temperature measuring device determines the temperature distribution information of the workpiece 60, such as a thermal cloud map, the controller 50 calculates the parameters requiring controlled cooling for each part based on the thermal cloud map, such as the coordinates of each air jet unit and the diameter of the nozzle 15. It then controls the moving module to carry the corresponding air jet unit into position and controls the corresponding telescopic device to change the diameter of the nozzle 15, thereby precisely controlling the temperature of the workpiece 60 by blowing air into specific zones.

[0048] Figure 4 This is a schematic diagram of the structure of the jet unit according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the nozzle structure according to an embodiment of the present invention. Figure 4 and Figure 5 As shown, the nozzle 15 is formed by winding a wall plate 151 with a certain elasticity, with the two ends overlapping to form a complete nozzle. Two ear plates 153 are respectively set near the two ends, and the two ear plates 153 are arranged opposite each other on the outer wall surface of the nozzle. The first motor 152 is fixedly set on the outside of one ear plate 153 (the side facing away from the other ear plate 153). The first lead screw 155, which is connected to the first motor 152, passes through the two ear plates 153. The first nut 156 (lead screw nut) on the outside of the other ear plate 153 is set on the first lead screw 155 at that location, so that the first nut 156 fits against the outer surface of the other ear plate 153. When the controller 50 controls the first motor 152, such as a servo motor, to rotate, it drives the first lead screw 155 to rotate. The first nut 156, which is adapted to the first lead screw 155, moves on the lead screw 155. For example, when the first nut 156 moves towards the first motor 152, the distance between the two ear plates 153 decreases, and the nozzle diameter of the tube shrinks. Conversely, when the first nut 156 moves away from the first motor 152, the tube recovers its shape under the elastic action of the wall plate 151, increasing the distance between the two ear plates 153 and expanding the nozzle diameter of the tube, thereby allowing the cooling gas to cover a larger area. For example, the wall plate 151 can be a leaf spring.

[0049] Through the cooperation of the lead screw, lead screw nut, and servo motor, the above-mentioned telescopic device can precisely control the diameter of the nozzle 15, making it easier to accurately achieve the consistency of residual stress in the workpiece 60.

[0050] It should be noted that the tube body can be formed from alloy materials, composite materials or plastics with a certain degree of elasticity. On the one hand, the overlapping of the ends of the elastic wall plates 151 makes it easier to achieve the sealing of the side surface of the tube body; on the other hand, it can be achieved by restoring its own shape when the diameter needs to be expanded.

[0051] In some embodiments, the extension and retraction of the telescopic device can also be achieved by a cylinder. The cylinder is fixed on one ear plate 153, and the extension and retraction end of the cylinder is fixed on another ear plate 153. The nozzle diameter is adjusted by changing the distance between the two ear plates 153 through the extension and retraction of the cylinder.

[0052] For example, the jet unit also includes an elastic collar, through which the tapered hose 14 is fitted onto the outer wall of the tube body.

[0053] Continue as Figure 4 As shown, the opening of the tapered hose 14 is fitted onto the outer wall of the pipe body. Under the elastic action of the elastic collar, the opening of the tapered hose 14 always fits against the pipe body when the diameter of the pipe body changes. The tapered hose 14 has a certain rigidity to support the nozzle 15. The tapered hose 14 can serve as a transition pipe and connect to the nozzle 15 with a larger diameter. At the same time, the tapered hose 14 has a certain elasticity and can change with the diameter of the nozzle 15.

[0054] Combination Figure 4 and Figure 5 As shown, the nozzle 15 also includes a plurality of guide rods 154, one end of which is fixed on a lug 153 and the other end passes through a guide hole on another lug 153.

[0055] For example, there are four guide rods 154, roughly distributed at the four corners of the rectangular ear plate 153. One end of each guide rod 154 is fixed to one ear plate 153, while the other ear plate 153 has four guide holes for the guide rods 154 to slide within these holes, thereby allowing the two ear plates 153 to move stably under the action of the telescopic device. It can be understood that even a small change in the distance between the two ear plates 153 results in a change in the diameter of the nozzle 15, thus achieving the desired adjustment of the jet spray area.

[0056] For example, a linear bearing may also be provided in the guide hole of the ear plate 153 so that the guide rod 154 can slide smoothly on the ear plate 153 to play a guiding role.

[0057] Figure 3 This is an isometric structural schematic diagram of a moving module according to an embodiment of the present invention. (Combined with...) Figure 3 and Figure 1As shown, the mobile module of an exemplary embodiment of the present invention includes multiple first tracks 161 extending along a first direction and multiple first moving parts 163 movably disposed on the first tracks 161; each jet unit is disposed on a corresponding first moving part 163, and the first moving part 163 is communicatively connected to the controller 50.

[0058] In some embodiments, the mobile module further includes two second rails 162 extending along a second direction and a plurality of second moving parts 164 movably disposed on each of the second rails 162; wherein the second direction is perpendicular to the first direction; both ends of each first rail 161 are respectively disposed on the corresponding second moving parts 164 on the two second rails 162, and the second moving parts 164 are communicatively connected to the controller 50.

[0059] In practical applications, in the initial state, multiple jet units are distributed in an array, and their distribution area can be larger than the size of the workpiece 60. Multiple first guide rails 161 are arranged in parallel and extend along a first direction. Each first guide rail 161 is equipped with multiple first moving parts 163, and each first moving part 163 is equipped with a corresponding jet unit. The first moving parts 163 and second moving parts 164 are both combinations of lead screws and servo motors. The lead screws and nuts are adapted to either the first guide rail 161 or the second guide rail 162, meaning that each first moving part 163 and each second moving part 164 can move independently under the control of the controller 50. In other words, each jet unit can move to a corresponding position in the first direction under the drive of the first moving part 163.

[0060] Each first wire rail 161 has its two ends respectively set on a corresponding set (two) of second moving parts 164 on the two second wire rails 162. That is, each first wire rail 161 moves to the corresponding position in the second direction under the drive of the set of second moving parts 164. In other words, each jet unit can move in two directions, thereby reaching the corresponding position of the workpiece 60 to be cooled.

[0061] like Figure 2 As shown, the cooling control device 10 of the exemplary embodiment of the present invention also includes a plurality of connected flow valves 12 and bellows 13, and each jet unit is connected to the air supply device 20 through a corresponding flow valve 12 and bellows 13.

[0062] For example, a distributor 11, a flow valve 12, and a bellows 13 are sequentially arranged on the pipeline between the air supply device 20 and the jet unit. The air inlet of the distributor 11 is connected to the air supply device 20, and its multiple air outlets are respectively connected to the corresponding jet units through the flow valve 12 and the bellows 13.

[0063] The aforementioned flow valve 12 can be connected to the controller 50 to control the gas flow rate, thereby controlling the cooling rate of the corresponding area of ​​the workpiece 60 by the nozzle 15. The bellows 13 can be a corrugated flexible hose with a certain degree of extensibility. It connects to the conical flexible hose in the jet unit on the first moving part 163. When the jet unit moves, the extensibility of the bellows 13 will not affect the gas flow. It is understood that the outlets of the distributors 11 correspond one-to-one with the jet units. A flow valve 12 and a bellows 13 are provided between the outlet of each distributor 11 and the jet unit, thus allowing independent control of the gas flow rate of each nozzle 15.

[0064] like Figure 1 As shown, the number of cooling control devices 10 in the exemplary embodiment of the present invention is two, and the two cooling control devices 10 are respectively disposed on both sides of the workpiece 60.

[0065] In practical applications, the workpiece 60 to be cooled is placed in the middle position between the two controlled cooling devices 10. For example, the heat treatment equipment also includes a lifting device located in the middle of the frame. The lifting device is used to position the workpiece 60 in the middle position between the two controlled cooling devices 10. The lifting device can be a frame structure supported by multiple hydraulic cylinders. The frame structure can support the part of the workpiece 60 near the edge, thereby detaching it from the platform 31 of the transfer device 30 and lifting it to a suitable height so that the platform 31 of the transfer device 30 can be withdrawn.

[0066] For example, a workpiece 60, such as a disc forging, is placed flat on a frame structure. Two cooling control devices 10 are arranged symmetrically on the upper and lower sides of the disc forging in mirror image. The nozzles 15 are all directed toward the disc forging to cool it from both sides, thereby more precisely controlling the cooling position, cooling area size, and cooling rate of various parts of the workpiece 60, and thus optimizing the residual stress and mechanical properties of the workpiece 60.

[0067] For example, the temperature measuring device can be multiple infrared thermometers, which are set on the frame and located between the two cooling control devices 10 to form a thermal cloud map of the workpiece 60, detect the temperature change of the disc forging in real time, and calculate the cooling parameters at the corresponding position of the workpiece 60 through the controller 50.

[0068] For example, two air supply devices 20 are respectively installed at the top and bottom of the frame. The air supply devices 20 can be air compressors and air tanks, and are connected to the air inlet of the distributor 11 through hoses.

[0069] Example 2

[0070] Based on Embodiment 1, the heat treatment equipment of the exemplary embodiment of the present invention further includes a transfer device 30, a heating furnace 40, and a track disposed between the heating furnace 40 and the frame. The heating furnace 40 is used to heat the workpiece 60. The transfer device 30 is movably disposed on the track and is used to transfer the workpiece 60 in the heating furnace 40 to the corresponding position of the cooling control device 10.

[0071] In practical applications, the heating furnace 40 can strictly control the heating time of the disc forging, and the transfer device 30 can strictly control the transfer time through a CNC servo motor. Specifically, under the control of the controller 50, the heating furnace 40 heats the disc forging according to a set program. When the time is up, the furnace door is opened and the disc forging is removed using the transfer device 30. It is then transferred to the position of the cooling device 10 via a track. The forging is then lifted by the frame structure on the lifting device, thereby detaching it from the transfer device 30.

[0072] Figure 6 This is a schematic diagram of the transfer device according to an embodiment of the present invention. See also... Figure 6 The transfer device 30 of the exemplary embodiment of the present invention includes a base plate 37, a track plate 32, a lifting mechanism, and a platform 31 for carrying the workpiece 60. The lifting mechanism is located between the base plate 37 and the track plate 32. The platform 31 is movably mounted on the track plate 32 via track wheels, and the base plate 37 is mounted on the track via rollers.

[0073] In some embodiments, the rollers on the base plate 37 are connected to a servo motor for transmission. The controller 50 controls the rollers to move the base plate 37 on the track. For example, the rollers can be H-shaped track wheels, of which there are four, arranged on the bottom of the base plate 37 respectively.

[0074] In some embodiments, the bottom of the platform 31 has four T-shaped track wheels, each track wheel is connected to a servo motor, and the track plate 32 is provided with a track that cooperates with the T-shaped track wheels. Driven by the track wheels, the platform 31 can move relative to the track plate 32, and can move to the top of the lifting device in the frame with the cooperation of the track on the frame, so that the frame structure can lift the workpiece 60.

[0075] See also Figure 6 The base plate 37 and the track plate 32 are connected by a lifting mechanism so that the platform 31 can be raised and lowered to meet the needs of picking up and placing workpieces 60.

[0076] Specifically, the lifting mechanism includes two link assemblies arranged in a mirror-symmetric manner. Each link assembly includes a first link 331, a second link 332, a third link 333, a fourth link 334, and a pin 36. One end of the first link 331 is hinged to the track plate 32, and the other end is hinged to the first end of the pin 36. One end of the second link 332 is hinged to the base plate 37, and the other end is hinged to the first end of the pin 36. One end of the third link 333 is hinged to the track plate 32, and the other end is hinged to the second end of the pin 36. One end of the fourth link 334 is hinged to the base plate 37, and the other end is hinged to the second end of the pin 36.

[0077] A drive device is also provided between the two linkage assemblies, specifically including two lead screw nuts, a second lead screw 34, and a second motor 35. The second motor 35 can be a through-type stepper motor. The two lead screw nuts are respectively located at the middle positions of the two pins 36, and the two ends of the lead screw after passing through the stepper motor are respectively adapted to the two lead screw nuts. When the through-type stepper motor drives the second lead screw 34 to rotate, the distance between the two lead screw nuts increases or decreases, thereby pushing the height of the two linkage assemblies to rise or fall, realizing the lifting and lowering of the platform 31. Based on this, the lifting and lowering distance of the platform can be more precisely controlled by the cooperation of the lead screw, lead screw nut, and stepper motor.

[0078] Example 3

[0079] Based on Embodiment 2, the lifting mechanism is replaced with a hydraulic cylinder or an electric cylinder. For example, multiple hydraulic cylinders are fixed on the base plate 37, and the hydraulic rods of the hydraulic cylinders are connected to the track plate 32. The lifting of the track plate 32 and the platform 31 is controlled by the controller 50.

[0080] As can be seen from the above, the heat treatment equipment provided by the exemplary embodiment of the present invention can realize closed-loop control of heating, transferring and cooling of workpieces. The cooling control device can dynamically adjust the cooling position, cooling area size and cooling speed according to real-time temperature monitoring. Therefore, it can effectively control the residual stress and mechanical properties of disc forgings, so that the residual stress has consistency and improves the stability of workpiece batches.

[0081] Those skilled in the art should understand that the above embodiments are merely for illustrating the present invention and are not intended to limit the scope of the invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A heat treatment device for residual stress in workpieces, characterized in that, It includes a frame, a cooling control device, a temperature measuring device, and a controller. The cooling control device includes an air supply device and multiple jet units connected to the air supply device. Each of the jet units is movably mounted on the frame via a movable module. The jet unit includes a connected tapered hose and a nozzle, the cross-section of which increases along the direction close to the nozzle, and the nozzle facing the workpiece; The nozzle includes a pipe body, a telescopic device, and two opposing lugs. The pipe body is formed by winding a wall panel, and the two lugs are respectively disposed on the outer wall surface of the wall panel near both ends. The telescopic device includes a first lead screw nut, a first lead screw, and a first motor that is drivenly connected to the first lead screw. The first motor is disposed on one of the ear plates, and the first lead screw nut is disposed on the first lead screw and abuts against the side of another ear plate opposite to the first motor. The temperature measuring device is used to acquire the temperature information of the workpiece, and the temperature measuring device, the moving module and the first motor are all communicatively connected to the controller.

2. The heat treatment equipment according to claim 1, characterized in that, The jet unit also includes an elastic collar, and the tapered hose is fitted onto the outer wall of the tube body through the elastic collar.

3. The heat treatment equipment according to claim 1, characterized in that, The nozzle also includes multiple guide rods, one end of which is fixed to one of the ear plates, and the other end of which passes through a guide hole on another ear plate.

4. The heat treatment equipment according to any one of claims 1-3, characterized in that, The mobile module includes multiple first tracks extending along a first direction and multiple first moving parts movably disposed on the first tracks. Each of the jet units is mounted on a corresponding first moving part, which is communicatively connected to the controller.

5. The heat treatment equipment according to claim 4, characterized in that, The mobile module further includes two second rails extending along a second direction and a plurality of second moving parts movably disposed on each of the second rails; wherein the second direction is perpendicular to the first direction; Both ends of each of the first wire rails are respectively located on the corresponding second moving parts on the two second wire rails, and the second moving parts are communicatively connected to the controller.

6. The heat treatment equipment according to any one of claims 1-3, characterized in that, The cooling control device also includes multiple connected flow valves and bellows, and each jet unit is connected to the air supply device through the corresponding flow valve and bellows.

7. The heat treatment equipment according to claim 6, characterized in that, The number of cooling control devices is two, and the two cooling control devices are respectively located on both sides of the workpiece.

8. The heat treatment equipment according to claim 7, characterized in that, The heat treatment equipment also includes a lifting device located in the middle of the frame, which is used to position the workpiece in the middle between the two cooling control devices.

9. The heat treatment equipment according to claim 6, characterized in that, The heat treatment equipment also includes a transfer device, a heating furnace, and a track between the heating furnace and the frame, wherein the heating furnace is used to heat the workpiece; The transfer device is movably mounted on the track and is used to transfer the workpiece in the heating furnace to the corresponding position of the controlled cooling device.

10. The heat treatment equipment according to claim 9, characterized in that, The transfer device includes a base plate, a track plate, a lifting mechanism, and a platform for carrying the workpiece. The lifting mechanism is located between the base plate and the track plate. The platform is movably mounted on the track plate via track wheels, and the base plate is mounted on the track via rollers.

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