Device and method for regulating and controlling residual stress of casting after heat treatment

Abstract

The invention relates to the technical field of residual stress regulation and control of castings, in particular to a device and a method for regulating and controlling residual stress of a casting after heat treatment. In order to solve the problem that a common method for regulating and controlling the residual stress of the casting after heat treatment is poor in regulating and controlling effect on a stress concentration area or internal residual stress of the casting, the invention provides a device and a method for regulating and controlling the residual stress of the casting after heat treatment. The vibration aging mechanism comprises a vibration reduction platform, an elastic cushion and a vibration exciter, and the elastic cushion is fixed to the upper surface of the vibration reduction platform; the shot peening strengthening mechanism comprises two linear modules, two six-axis mechanical arms and two shot peening assemblies, the two six-axis mechanical arms are fixed to the two linear modules correspondingly, each shot peening assembly comprises a shot peening pipe, and the shot peening pipes are fixed to the tail ends of the six-axis mechanical arms. During use, the vibration aging mechanism and the shot peening strengthening mechanism are used for carrying out synchronous coupling regulation and control on the casting. The regulation and control device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating residual stress of castings, and in particular to a device and method for regulating residual stress of heat-treated castings. Background Art

[0002] In the field of mechanical manufacturing, residual stress in castings is a common problem, which directly affects the dimensional stability, fatigue life and corrosion resistance of castings. The generation of residual stress mainly stems from non-uniform cooling and phase transformation during the heat treatment process of castings. If these residual stresses are not controlled, the castings will deform or even crack during subsequent processing or use. Therefore, how to effectively eliminate or regulate the residual stress of castings has always been the focus of research in the manufacturing industry. Currently, the commonly used methods for regulating residual stress of heat-treated castings mainly include thermal aging, vibration aging and shot peening. Although thermal aging has significant effects, it has a long cycle and is prone to reducing the material properties while reducing residual stress; vibration aging redistributes the internal stress of the casting through mechanical vibration, but its effect is mainly to homogenize the overall residual stress distribution, and the regulation effect on stress concentration areas needs to be improved; shot peening introduces surface compressive stress to offset tensile stress by impacting the surface with high-speed projectiles, but its penetration depth is limited, and the regulation effect on internal residual stress of castings is not good, and it is difficult to reach the internal residual stress of castings. Summary of the Invention

[0003] In order to solve the problem that the commonly used methods for regulating residual stress of heat-treated castings have poor regulation effects on stress concentration areas or internal residual stress of castings, the present invention provides a new device and method for regulating residual stress of heat-treated castings.

[0004] The present invention is implemented by adopting the following technical solutions: A device for regulating residual stress of heat-treated castings includes a vibration aging mechanism and a shot peening mechanism; The vibration aging mechanism includes a vibration damping platform, an elastic pad for supporting the casting, and an exciter installed on the casting through a fixture, and the elastic pad is fixed on the upper surface of the vibration damping platform; The shot peening mechanism includes two linear modules respectively arranged on the left and right sides of the casting, two six-axis robotic arms, and two sets of shot peening components for implementing shot peening process on the casting. The two linear modules are both arranged in the front-rear direction, the two six-axis robotic arms are respectively fixed on the two linear modules, and the two sets of shot peening components both include shot peening pipes communicated with high-pressure pipes, and the shot peening pipes are fixed at the end parts of the corresponding six-axis robotic arms.

[0005] Principle description: During use, the vibration aging mechanism and the shot peening strengthening mechanism operate simultaneously to achieve the coupled processing of vibration aging and shot peening strengthening. Among them, in the vibration aging mechanism, the casting is vibrated by the vibrator, and the vibration damping platform is used to prevent the vibration of the casting from being transmitted to the shot peening strengthening mechanism, affecting the processing accuracy and service life of the shot peening strengthening mechanism; in the shot peening strengthening mechanism, the positioning of the shot peening component is achieved through the linear module and the six-axis robotic arm, and the shot peening processing of the casting is achieved through the shot peening component.

[0006] Furthermore, the vibration damping platform includes a working plate, a plurality of damping spring shock absorbers, an air-floating shock absorber, and a plurality of conical rubber pads. The air-floating shock absorber includes an air pipe, a plurality of air bags arranged in an array, and an air bag groove for placing the air bags. The working plate is located above the air bags. The plurality of damping spring shock absorbers are adapted to the plurality of air bags and are arranged between the working plate and the corresponding air bags. The plurality of conical rubber pads are distributed below the air-floating shock absorber. The structure of the vibration damping platform is specified and standardized. By setting a four-stage vibration damping structure, namely elastic pads, damping spring shock absorbers, air-floating shock absorbers, and conical rubber pads, among which the air-floating shock absorber provides vibration damping jointly by the flexibility of a plurality of air bags, and the air pressure is adjusted to adapt to castings of different weights, effectively reducing the impact of the vibration brought by the vibrator on other components except the casting.

[0007] Furthermore, there are four elastic pads. During use, the four elastic pads are arranged below the four corners of the casting, and the structure is specified and standardized.

[0008] Furthermore, a plurality of first inverted T-shaped through grooves with their length directions all arranged in the front-rear direction and a plurality of second inverted T-shaped through grooves with their length directions all arranged in the left-right direction are uniformly arranged on the upper surface of the working plate. The four elastic pads are all fixed to the working plate through T-shaped bolts and nuts. The T-shaped bolts are slidably fitted in the first inverted T-shaped through grooves and the second inverted T-shaped through grooves. The structural design of the first inverted T-shaped through grooves and the second inverted T-shaped through grooves on the upper surface of the working plate facilitates the four elastic pads to adjust their positions according to the size and shape of the casting, and is convenient for supporting castings of different sizes and shapes.

[0009] Furthermore, the four elastic pads are all I-shaped rubber pads.

[0010] Furthermore, the vibration aging mechanism further includes a sensor pasted on the surface of the casting and used for monitoring the vibration state of the casting. By monitoring the vibration state of the casting through the sensor, the vibration aging process parameters are adjusted according to the vibration state of the casting, thereby improving its control effect.

[0011] Furthermore, the device further includes an integration mechanism, which includes a sheet metal protective cover. A transparent observation window and a human-machine interaction interface for setting processing instructions are provided in the front of the sheet metal protective cover. A sliding door is provided in the back of the sheet metal protective cover. The vibration aging mechanism and the shot peening strengthening mechanism are placed inside the sheet metal protective cover. An electrical control cabinet and a gas circuit control cabinet are also provided inside the sheet metal protective cover. The design of the integration mechanism makes the device integrated and standardized.

[0012] Furthermore, the fixture is a G-type fixed clamp, which has a simple structure and is easy to implement.

[0013] A method for regulating residual stress of a heat-treated casting is realized by using a device for regulating residual stress of a heat-treated casting as described above, that is, the casting is synchronously and coupledly regulated by a vibration aging mechanism and a shot peening strengthening mechanism.

[0014] A method for regulating residual stress of a heat-treated casting includes the following steps: 1) Establish a three-dimensional model of the casting by using Abaqus finite element simulation software, simulate the temperature field-stress field coupling during the heat treatment process of the casting, and use the obtained heat treatment stress field as the initial stress field during regulation; 2) In the Abaqus finite element simulation software, perform synchronous coupling regulation analysis of the vibration aging process and the shot peening strengthening process with the initial stress field obtained in step 1) as the initial state, and select the vibration aging process parameters and shot peening strengthening process parameters that generate the maximum dynamic stress as the vibration aging process parameters and shot peening strengthening process parameters during the final regulation; 3) Realize the synchronous coupling regulation of the vibration aging process and the shot peening strengthening process by using a device for regulating residual stress of a heat-treated casting as described above, where the vibration aging process parameters and shot peening strengthening process parameters are selected as the vibration aging process parameters and shot peening strengthening process parameters during the final regulation determined in step 2).

[0015] The beneficial effects of the present invention are as follows: 1) The vibration aging - shot peening strengthening coupling regulation device is proposed for the first time, breaking through the bottleneck that it is difficult to balance between "surface - interior" in traditional processes, and is especially suitable for high - end castings in fields such as aerospace and heavy machinery; 2) Through the structural design of the vibration damping platform, a sufficient suspended structure is provided for the vibration aging process, enabling the casting to vibrate while reducing the vibration conduction to the six - axis robotic arm and ensuring the movement accuracy of the six - axis robotic arm; 3) High - speed shot is synchronously sprayed during vibration, using the vibration energy to enhance the shot impact effect, forming a deeper compressive stress layer on the surface. At the same time, vibration assists in the uniformization of the surface compressive stress, making the connection between the surface stress and the internal stress relatively smooth and making the compressive stress layer introduced by the shot peening strengthening process more stable; 4) Through the synchronous coupling regulation of vibration aging and shot peening strengthening, the casting effectively regulates the stress on the surface and inside at the same time, that is, not only realizes the uniform distribution regulation of the internal stress layer, but also utilizes the high - frequency micro - strain of vibration aging to promote the recombination of the dislocation structure introduced by shot peening, enhancing the uniformity and stability of the compressive stress layer. At the same time, the depth of the compressive stress is indirectly increased through the stress field redistribution effect caused by the transmission of vibration energy through the elastic medium, and the residual stress in the stress concentration area is also reduced, to a certain extent improving the stress regulation efficiency; 5) The regulation device has a simple structure and is easy to operate, suitable for industrial applications; 6) The regulation device can also perform vibration aging processing or shot peening strengthening processing on the workpiece alone according to the processing needs of the workpiece, with high resource utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments in line with the present invention, and are used together with the specification to explain the principles of the present invention.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is the overall structural schematic diagram of the regulation device described in the present invention; Figure 2 is Figure 1 the top view of; Figure 3 is the assembly structural schematic diagram of the vibration aging mechanism and the shot peening strengthening mechanism; Figure 4 is the enlarged structural schematic diagram of the shot peening component and the end part of the six - axis robotic arm; Figure 5 is the schematic diagram of the vibration damping platform after removing the workpiece plate; Figure 6Schematic structural diagram of a damping spring shock absorber; Figure 7 Schematic structural diagram of an air-floating shock absorber; Figure 8 Schematic diagram of the effective stress distribution after heat treatment of the casting; Figure 9 Schematic diagram of the stress distribution in the S11 direction after heat treatment of the casting; Figure 10 Schematic diagram of the effective stress distribution of the machined casting before and after vibratory stress relief and shot peening strengthening; Figure 11 Schematic diagram of the stress distribution in the S11 direction of the machined casting before and after vibratory stress relief and shot peening strengthening; Figure 12 Schematic diagram of the effective stress distribution of the casting after the combined coupling processing of vibratory stress relief and shot peening strengthening; Figure 13 Schematic diagram of the stress distribution in the S11 direction of the casting after the combined coupling processing of vibratory stress relief and shot peening strengthening; Figure 14 Schematic diagram of the stress distribution law in the S11 direction at the center line position of the casting (surface - interior - surface).

[0019] In the figure: 1 - vibratory stress relief mechanism, 101 - elastic pad, 102 - vibrator, 103 - working plate, 104 - damping spring shock absorber, 105 - air-floating shock absorber, 1051 - air pipe, 1052 - airbag, 1053 - airbag groove, 106 - conical rubber pad, 107 - first inverted T-shaped through groove, 108 - second inverted T-shaped through groove, 109 - sensor, 2 - shot peening strengthening mechanism, 201 - linear module, 202 - six-axis robotic arm, 203 - shot peening pipe, 3 - sheet metal protective cover, 4 - transparent observation window, 5 - human-machine interaction interface, 6 - sliding door, 7 - casting, 8 - electrical control cabinet, 9 - gas circuit control cabinet. Specific implementation manners

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the solution of the present invention will be further described below. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance. It should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0023] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] As Figures 1 to 7 shown, a device for regulating the residual stress of a heat-treated casting includes a vibration aging mechanism 1 and a shot peening strengthening mechanism 2; The vibration aging mechanism 1 includes a vibration damping platform, an elastic pad 101 for supporting the casting 7, and an exciter 102 installed on the casting 7 through a fixture. The elastic pad 101 is fixed on the upper surface of the vibration damping platform; The shot peening strengthening mechanism 2 includes two linear modules 201 respectively arranged on the left and right sides of the casting 7, two six-axis robotic arms 202, and two sets of shot peening assemblies for performing shot peening on the casting 7. The two linear modules 201 are both arranged in the front-rear direction, the two six-axis robotic arms 202 are respectively fixed on the two linear modules 201, and both sets of shot peening assemblies include a shot peening pipe 203 communicated with a high-pressure pipe. The shot peening pipe 203 is fixed at the end of the corresponding six-axis robotic arm 202.

[0025] Principle description: During use, the vibration aging mechanism 1 and the shot peening strengthening mechanism 2 act simultaneously to achieve the coupled processing of vibration aging and shot peening. Among them, in the vibration aging mechanism 1, the casting 7 is vibrated by the exciter 102, and the vibration damping platform is used to prevent the vibration of the casting 7 from being transmitted to the shot peening strengthening mechanism 2, affecting the processing accuracy and service life of the shot peening strengthening mechanism 2; in the shot peening strengthening mechanism 2, the positioning of the shot peening assembly is achieved through the linear module 201 and the six-axis robotic arm 202, and the shot peening of the casting 7 is achieved through the shot peening assembly.

[0026] In specific implementation, the vibration damping platform includes a working plate 103, a plurality of damping spring shock absorbers 104, an air-floating shock absorber 105, and a plurality of conical rubber pads 106. The air-floating shock absorber 105 includes an air pipe 1051, a plurality of air bags 1052 distributed in an array, and an air bag groove 1053 for placing the air bags 1052. The working plate 103 is located above the air bags 1052. The plurality of damping spring shock absorbers 104 are adapted to the plurality of air bags 1052 and are arranged between the working plate 103 and the corresponding air bags 1052. The plurality of conical rubber pads 106 are distributed below the air-floating shock absorber 105. The structure of the vibration damping platform is specific and standardized. By setting a four-stage vibration damping structure, namely an elastic pad 101, a damping spring shock absorber 104, an air-floating shock absorber 105, and a conical rubber pad 106, among which the air-floating shock absorber 105 provides vibration damping jointly through the flexibility of the plurality of air bags 1052, and by adjusting the air pressure to adapt to castings 7 of different weights, the influence of the vibration brought by the vibrator 102 on other components except the castings 7 is effectively reduced.

[0027] In specific implementation, there are four elastic pads 101. During use, the four elastic pads 101 are arranged below the four corners of the casting 7, and the structure is specific and standardized.

[0028] In specific implementation, a plurality of first inverted T-shaped through grooves 107 whose length directions are all arranged in the front-rear direction and a plurality of second inverted T-shaped through grooves 108 whose length directions are all arranged in the left-right direction are uniformly arranged on the upper surface of the working plate 103. The four elastic pads 101 are all fixed to the working plate 103 through T-shaped bolts and nuts. The T-shaped bolts are slidably adapted in the first inverted T-shaped through grooves 107 and the second inverted T-shaped through grooves 108. The structural design of the first inverted T-shaped through grooves 107 and the second inverted T-shaped through grooves 108 on the upper surface of the working plate 103 facilitates the four elastic pads 101 to adjust their positions according to the size and shape of the casting 7, and is convenient for supporting castings 7 of different sizes and shapes.

[0029] In specific implementation, the four elastic pads 101 are all I-shaped rubber pads.

[0030] In specific implementation, the vibration aging mechanism 1 further includes a sensor 109 pasted on the surface of the casting 7 and used for monitoring the vibration state of the casting 7. By monitoring the vibration state of the casting 7 through the sensor 109 and setting the vibration aging process parameters according to the vibration state of the casting 7, the control accuracy is improved.

[0031] During specific implementation, the device further includes an integration mechanism. The integration mechanism includes a sheet metal protective cover 3. A transparent observation window 4 and a human-machine interaction interface 5 for setting processing instructions are provided in the front of the sheet metal protective cover 3. A sliding door 6 is provided in the back of the sheet metal protective cover 3. The vibration aging mechanism 1 and the shot peening strengthening mechanism 2 are placed inside the sheet metal protective cover 3. An electrical control cabinet 8 and a gas circuit control cabinet 9 are also provided inside the sheet metal protective cover 3. The design of the integration mechanism makes the device integrated and standardized.

[0032] During specific implementation, the fixture is a G-type fixed clamp, which has a simple structure and is easy to implement.

[0033] A method for regulating residual stress of a heat-treated casting is realized by using a device for regulating residual stress of a heat-treated casting as described above, that is, the casting 7 is synchronously and coupledly regulated by the vibration aging mechanism 1 and the shot peening strengthening mechanism 2.

[0034] A method for regulating residual stress of a heat-treated casting includes the following steps: 1) Use Abaqus finite element simulation software to establish a three-dimensional model of the casting 7, simulate the temperature field-stress field coupling during the heat treatment process of the casting 7, and obtain the heat treatment stress field as the initial stress field during regulation; 2) In the Abaqus finite element simulation software, take the initial stress field obtained in step 1) as the initial state to perform synchronous and coupled regulation analysis of the vibration aging process and the shot peening strengthening process, and select the vibration aging process parameters and shot peening strengthening process parameters that generate the maximum dynamic stress as the vibration aging process parameters and shot peening strengthening process parameters during the final regulation; 3) Use a device for regulating residual stress of a heat-treated casting as described above to realize the synchronous and coupled regulation of the vibration aging process and the shot peening strengthening process, where the vibration aging process parameters and shot peening strengthening process parameters are selected as the vibration aging process parameters and shot peening strengthening process parameters during the final regulation determined in step 2).

[0035] To verify the effectiveness of the residual stress regulation method described in the present invention, the stress distribution diagram processed by the method of the present invention is now compared with the stress distribution diagrams of the methods of first vibration aging and then shot peening strengthening and after heat treatment (the stress distribution after heat treatment is the initial stress distribution during regulation described in the regulation method of the present invention): From Figure 8 it can be seen that the internal distribution of the equivalent residual stress after heat treatment is uneven. From Figure 9 it can be seen that peak tensile stress is formed inside the casting 7 after heat treatment, and compressive stress is formed on the surface of the casting 7. The stress distribution is uneven from the inside to the surface, forming a high stress gradient. From Figure 7 and Figure 8 it can be seen the necessity of regulating the residual stress of the casting 7 after heat treatment by the present invention. Figure 10 and Figure 12 Comparing with Figure 12The internal stress homogenization effect is more effective, and the depth of the introduced compressive stress on the surface is deeper; Figure 11 and Figure 13 Comparing with Figure 11 and Figure 13 , it is found that: due to the intervention of vibration, the connection between the surface stress and the internal stress is relatively smooth, optimizing the stress gradient on the surface of casting 7. The surface strengthening shows that the residual compressive stress gradually decreases from the surface to the inside, and the residual stress homogenization effect is significant. In addition, Figure 9 the stress peak value in the S11 direction in Figure 9 is 164.8 MPa, Figure 11 the stress peak value in the S11 direction in Figure 11 is 321 MPa, Figure 13 the stress peak value in the S11 direction in Figure 13 is 150 MPa. From this, it can be seen that the stress in the stress concentration area of casting 7 decreases after being regulated by the regulation method described in the present invention.

[0036] In addition, from Figure 14 the schematic diagram of the stress field distribution law, it can be seen that: the stress distribution diagram after heat treatment shows that the residual compressive stress on the surface of casting 7 is relatively large, and the residual tensile stress inside is relatively large, forming a large stress gradient. Comparing the coupling regulation method described in the present invention with the methods of vibration aging and shot peening strengthening before and after processing, it can be known that after processing casting 7 by the coupling regulation method described in the present invention, the value of the residual compressive stress on the surface increases by 60%, the depth of the surface compressive stress increases by 21%, and the overall stress homogenization effect increases by 16%.

[0037] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Although the above embodiments have been described in detail, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the above embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the above embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A device for regulating residual stress of a heat-treated casting, characterized in that, It includes a vibratory stress relieving mechanism (1) and a shot peening strengthening mechanism (2); The vibratory stress relieving mechanism (1) includes a vibration damping platform, an elastic pad (101) for supporting a casting (7), and a vibrator (102) installed on the casting (7) through a fixture. The elastic pad (101) is fixed on the upper surface of the vibration damping platform; The shot peening strengthening mechanism (2) includes two linear modules (201) respectively arranged on the left and right sides of the casting (7), two six-axis robotic arms (202), and two sets of shot peening assemblies for performing a shot peening process on the casting (7). The two linear modules (201) are both arranged in the front-back direction. The two six-axis robotic arms (202) are respectively fixed on the two linear modules (201). Each set of shot peening assemblies includes a shot peening pipe (203) communicated with a high-pressure pipe. The shot peening pipe (203) is fixed at the end of the corresponding six-axis robotic arm (202).

2. The device for regulating the residual stress of a heat-treated casting according to claim 1, wherein The vibration damping platform includes a working plate (103), a plurality of damping spring shock absorbers (104), an air-floating shock absorber (105), and a plurality of conical rubber pads (106). The air-floating shock absorber (105) includes an air pipe (1051), a plurality of air bags (1052) distributed in an array, and an air bag groove (1053) for placing the air bags (1052). The working plate (103) is located above the air bags (1052). The plurality of damping spring shock absorbers (104) are adapted to the plurality of air bags (1052) and arranged between the working plate (103) and the corresponding air bags (1052). The plurality of conical rubber pads (106) are distributed below the air-floating shock absorber (105).

3. A device for regulating residual stress of a heat-treated casting according to claim 2, characterized in that, There are four elastic pads (101).

4. A device for regulating residual stress of a heat-treated casting according to claim 3, characterized in that, On the upper surface of the working plate (103), a plurality of first inverted T-shaped through grooves (107) whose length directions are all arranged in the front-back direction and a plurality of second inverted T-shaped through grooves (108) whose length directions are all arranged in the left-right direction are uniformly arranged. The four elastic pads (101) are all fixed on the working plate (103) through T-shaped bolts and nuts. The T-shaped bolts are slidably adapted in the first inverted T-shaped through grooves (107) and the second inverted T-shaped through grooves (108).

5. The residual stress control device for a heat-treated casting according to claim 4, characterized in that, The four elastic pads (101) are all I-shaped rubber pads.

6. The device for regulating the residual stress of a heat-treated casting according to claim 5, wherein, The vibratory stress relieving mechanism (1) further includes a sensor (109) pasted on the surface of the casting (7) and used for monitoring the vibration state of the casting (7).

7. A device for regulating residual stress of a heat-treated casting according to claim 6, characterized in that, The device further includes an integration mechanism. The integration mechanism includes a sheet metal protective cover (3). A transparent observation window (4) and a human-machine interaction interface (5) for setting processing instructions are provided on the front of the sheet metal protective cover (3). A sliding door (6) is provided on the back of the sheet metal protective cover (3). The vibratory stress relieving mechanism (1) and the shot peening strengthening mechanism (2) are placed in the sheet metal protective cover (3). An electrical control cabinet (8) and a gas circuit control cabinet (9) are also provided in the sheet metal protective cover (3).

8. A device for regulating the residual stress of a heat-treated casting according to claim 7, characterized in that, The fixture is a G-type fixed clamp.

9. A method for regulating the residual stress of a heat-treated casting, characterized in that, It is realized by using a device for regulating the residual stress of a heat-treated casting as described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, that is, the casting (7) is synchronously and coupledly regulated by the vibratory stress relieving mechanism (1) and the shot peening strengthening mechanism (2).

10. A method for regulating residual stress of a heat-treated casting, characterized in that, It includes the following steps: 1) Use Abaqus finite element simulation software to establish a three-dimensional model of the casting (7), simulate the temperature field-stress field coupling during the heat treatment of the casting (7), and use the obtained heat treatment stress field as the initial stress field during regulation; 2) In the Abaqus finite element simulation software, take the initial stress field obtained in step 1) as the initial state to conduct synchronous coupling regulation analysis of the vibration aging process and the shot peening process, and select the vibration aging process parameters and shot peening process parameters that generate the maximum dynamic stress as the vibration aging process parameters and shot peening process parameters during the final regulation; 3) Use a device for regulating the residual stress of a heat-treated casting as described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 to achieve synchronous coupling regulation of the vibration aging process and the shot peening process, wherein the vibration aging process parameters and shot peening process parameters are selected as the vibration aging process parameters and shot peening process parameters during the final regulation determined in step 2).

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