Low-frequency thermal vibration compound prototype for residual stress regulation

Abstract

The application relates to the field of additive manufacturing technology, in particular to a low-frequency thermal vibration composite prototype for residual stress regulation, which comprises a bottom cabinet, the upper end of the bottom cabinet is concave downward to form a groove, a vibrating plate is movably arranged in the groove, a fixed part of a vibration exciter is installed at the top of the bottom cabinet, a movable part of the vibration exciter penetrates through the bottom cabinet and is connected with the vibrating plate, a heat shield is attached to the upper end of the bottom cabinet, a heating element is installed on the inner wall of the heat shield, a functional plate is slidably connected to the inner wall of the heating element, a first magnetic plate is arranged at the lower end of the functional plate, a second magnetic plate is installed directly below the first magnetic plate, the first magnetic plate and the second magnetic plate are arranged to repel each other, a pressing plate is installed at the lower end of the second magnetic plate, a connecting piece is installed at the upper end of the functional plate, a fixed part of lifting equipment is arranged at the middle position of the upper end of an inverted U-shaped frame, and a movable part of the lifting equipment penetrates through the inverted U-shaped frame and is connected with the connecting piece. The design can compensate for the exciting force received by the product, effectively avoid the phenomenon that the upper position of the product is lowered by the exciting force, and improve the regulation effect.

Description

Technical Field

[0001] This invention is a low-frequency thermal vibration composite prototype for residual stress control, belonging to the field of additive manufacturing technology. Background Technology

[0002] In the process of additive manufacturing, in order to ensure product quality, it is generally necessary to control the residual stress of the product. Low-frequency thermal vibration composite prototype is generally used to control the residual stress on the product.

[0003] In order to make the metal laser additive manufacturing process efficient, a conveyor is usually set up on the additive manufacturing equipment, and the testing equipment and low-frequency thermal vibration composite prototype are set on the conveyor. The testing equipment is used to test the product and analyze the product contour data and stress distribution data. Based on the data, the low-frequency thermal vibration composite prototype is controlled to adjust the residual stress on the product.

[0004] Existing low-frequency thermal vibration composite prototypes generally consist of a housing, a heater installed inside the housing, a vibration table installed inside the housing, and an exciter installed outside the housing with its movable part connected to the vibration table. In use, the product is first clamped onto the vibration table, then the heater is used to heat and keep the clamped product warm, and then the exciter is used to drive the vibration table to vibrate, thereby applying excitation force to the product, and then performing thermal vibration treatment on the product, thereby performing residual stress control operations.

[0005] However, the product has a certain height. When an excitation force is applied to the product, the weight and height of the product itself will cause the excitation force applied to the upper part of the product to be consumed, resulting in a difference in the excitation force received by the upper and lower parts of the product, which will affect the control effect.

[0006] Content of this invention

[0007] To address the problems in the prior art, the present invention provides a low-frequency thermal vibration composite prototype for residual stress control.

[0008] The technical solution adopted by the present invention to solve its technical problem is: a low-frequency thermal vibration composite prototype for residual stress regulation, including a base cabinet installed at the outer end of a conveyor, the upper end of the base cabinet being recessed downward to form a groove, a vibrating plate being movably arranged inside the groove, and the upper end of the vibrating plate coinciding with the upper end of the base cabinet, and a fixed part of an exciter being installed at the top inside the base cabinet, and the movable part of the exciter passing through the base cabinet and connected to the vibrating plate;

[0009] The upper end of the base cabinet is provided with two vertical parts of an inverted U-shaped frame. The upper end of the base cabinet is attached to a heat insulation cover, and the heat insulation cover is located inside the inverted U-shaped frame. A heating element is installed on the inner wall of the heat insulation cover, and the groove is located inside the heating element.

[0010] The inner wall of the heating element is slidably connected to a functional plate. A first magnetic plate is provided at the middle of the lower end of the functional plate. A second magnetic plate is installed directly below the first magnetic plate, and the first magnetic plate and the second magnetic plate are arranged to repel each other. A pressure plate is installed at the lower end of the second magnetic plate, and the pressure plate is slidably connected to the inner wall of the heating element. The pressure plate is located directly above the vibrating plate.

[0011] A connector is installed at the middle of the upper part of the functional board, and the connector extends out of the upper side of the heat insulation cover. A fixed part of the lifting device is provided at the middle of the upper part of the inverted U-shaped frame, and the movable part of the lifting device passes through the inverted U-shaped frame and is connected to the connector.

[0012] The heat insulation cover is provided with a preheating component at its upper end, and the preheating component is located outside the connector.

[0013] Furthermore, the preheating component includes an air extractor, which is located on the front side of the upper end of the heat insulation cover and on the front side of the inverted U-shaped frame. Multiple air inlet pipes are equidistantly connected to the lower rear end of the heat insulation cover.

[0014] A protective box is installed on the rear side of the upper end of the heat insulation cover, and the protective box is located on the rear side of the inverted U-shaped frame. An airbag is installed on the lower side inside the protective box. The inlet of the air pump is connected to the top of the heat insulation cover, and the outlet of the air pump is connected to a connecting pipe with a one-way valve. The other end of the connecting pipe passes through the protective box and is connected to the airbag. The connecting pipe is located on the outside of the connector.

[0015] Furthermore, multiple jet pipes with a higher front and lower rear are equidistantly arranged at the rear end of the protective box, and control valves are installed on the jet pipes. The jet pipes pass through the protective box and are arranged in communication with the airbag.

[0016] A third magnetic plate is installed at the top inside the protective box, and a fourth magnetic plate is installed directly below the third magnetic plate. The fourth magnetic plate and the third magnetic plate are arranged to repel each other. A movable plate is installed at the lower end of the fourth magnetic plate and is slidably connected inside the protective box. The movable plate is attached to the upper end of the airbag.

[0017] Furthermore, the connector includes a round rod, which is mounted on the upper middle part of the functional plate and extends out of the upper side of the heat insulation cover. The movable part of the lifting device is connected to the round rod.

[0018] The right end of the round rod is recessed to the left to form multiple through grooves, and the through grooves penetrate the round rod. The upper end of the heat insulation cover is attached to the limiting plate, and the limiting plate penetrates the through grooves. The limiting plate is located on the lower side of the connecting pipe. The upper end of the limiting plate is symmetrically threaded with two limiting bolts, and the two limiting bolts are respectively attached to the left and right ends of the round rod.

[0019] Furthermore, two guide rods are symmetrically arranged at the upper end of the heat insulation cover, and the guide rods are arranged vertically. Both guide rods pass through the inverted U-shaped frame, and the guide rods are slidably connected to the inverted U-shaped frame. The two guide rods are located on the left and right sides of the limiting plate.

[0020] Multiple sealing rings are equidistantly fitted onto the outer end of the round rod, and the sealing rings are located in an annular groove, which is formed on the heat insulation cover.

[0021] Furthermore, the heating element includes a heat-conducting cylinder, which is installed on the top of the inside of the heat insulation cover, and the lower end of the heat-conducting cylinder is installed on the inner wall of the heat insulation cover. A functional plate and a pressure plate are movably arranged inside the heat-conducting cylinder.

[0022] The heat-conducting cylinder has a groove inside, and a frame heater is installed at the outer end of the heat-conducting cylinder. The frame heater is located inside the heat insulation cover, and the front end of the air inlet pipe passes through the heat insulation cover and is arranged in communication with the heat-conducting cylinder.

[0023] Furthermore, a U-shaped limiting plate is installed at the upper edge of the vibrating plate, and the lateral part of the U-shaped limiting plate is located at the front edge of the upper edge of the vibrating plate, and the U-shaped limiting plate is located on the lower side of the pressure plate.

[0024] Guide plates are provided at the rear ends of the two longitudinal sections of the U-shaped limiting plate, and the guide plates and the U-shaped limiting plate are integrated into one structure. The two guide plates are arranged in a V-shape with the front narrow and the rear wide, and the guide plates are installed on the rear side of the upper end of the vibrating plate.

[0025] Furthermore, guides are provided at the four corner positions between the lower end of the functional board and the upper end of the pressure plate, and the guides are located outside the first magnetic plate and outside the second magnetic plate.

[0026] Furthermore, a sealing element is provided at the lower end of the heat insulation cover, and the sealing element is attached to the upper end of the base cabinet.

[0027] The beneficial effects of this invention are:

[0028] 1. By using lifting equipment and round rods, the clamping structure formed by the functional plate, the first magnetic plate, the second magnetic plate and the pressure plate is lowered to clamp the product. The clamped product is heated to a predetermined temperature by a frame heater. Through the vibrator, vibrating plate, first magnetic plate, second magnetic plate and pressure plate, the product is subjected to force at both the top and bottom. The force on the upper part of the product is used to compensate for the excitation force, effectively preventing the upper part of the product from being lowered by the excitation force and improving the control effect.

[0029] 2. The function plate can be adjusted by using two limit bolts, a limiting plate, and multiple through slots to accommodate products of different heights, providing good functionality.

[0030] 3. Using a lifting device, components such as the round rod, limiting plate, functional plate, and pressure plate are moved upward. When the functional plate contacts the top of the inside of the heat insulation cover, the round rod, functional plate, and other components continue to move upward, causing the heat insulation cover to move upward along with the functional plate, thereby completely exposing the product. The lifting device is used to drive the clamping operation of the product and to drive the heat insulation cover to move up and down. It can also apply pressure to the heat insulation cover, reducing equipment costs and providing good functionality.

[0031] 4. Two guide plates can guide the product into the U-shaped limiting plate, thereby positioning and pushing the product onto the upper part of the vibration plate, effectively preventing misalignment between the product and the vibration table and ensuring working effect.

[0032] 5. Using an air extractor, hot air from the heat insulation cover is transported to the airbag for temporary storage. Additionally, the repulsive force between the third and fourth magnetic plates causes the movable plate to move downwards, allowing the hot air from the airbag to be blown onto the pushed product through multiple jet pipes, thus preheating the product and reducing the heating time for subsequent product heating operations. This method of using extracted hot air to preheat the product improves energy efficiency. Attached Figure Description

[0033] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of the structure of a low-frequency thermal vibration composite prototype for residual stress control according to the present invention;

[0035] Figure 2 This is a cross-sectional view of a low-frequency thermal vibration composite prototype for residual stress control according to the present invention.

[0036] Figure 3 for Figure 2 Enlarged view of part A;

[0037] Figure 4 This is an assembly drawing of the base cabinet and the vibration plate in a low-frequency thermal vibration composite prototype for residual stress control according to the present invention.

[0038] Figure 5 This is an assembly drawing of the air pump, protective box, jet pipe and connecting pipe in a low-frequency thermal vibration composite prototype for residual stress control according to the present invention.

[0039] Figure 6 for Figure 5 A sectional view;

[0040] Figure 7 This is a perspective view of the heat insulation cover in a low-frequency thermal vibration composite prototype for residual stress control according to the present invention.

[0041] Figure 8 This is an assembly drawing of the round rod, functional plate, first magnetic plate, second magnetic plate, pressure plate and telescopic rod in a low-frequency thermal vibration composite prototype for residual stress control according to the present invention.

[0042] In the diagram: 1. Base cabinet, 2. Heat insulation cover, 3. Inverted U-shaped frame, 4. Electric push rod, 5. Round rod, 6. Vibration plate, 7. Vibrator, 8. Functional plate, 11. Groove, 21. Evacuator, 22. Guide rod, 23. Protective box, 24. Jet pipe, 25. Air inlet pipe, 26. Frame rubber pad, 27. Heat conduction cylinder, 28. Frame heater, 29. Connecting pipe, 51. Through groove, 52. Limiting bolt, 53. Limiting plate, 61. U-shaped limiting plate, 62. Guide plate, 81. First magnetic plate, 82. Second magnetic plate, 83. Pressure plate, 84. Telescopic rod, 201. Sealing ring, 231. Third magnetic plate, 232. Fourth magnetic plate, 233. Movable plate, 234. Airbag. Detailed Implementation

[0043] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0044] Example 1: In order to make the metal laser additive manufacturing process efficient, a conveyor is generally set up on the additive manufacturing equipment, and detection equipment and low-frequency thermal vibration composite prototype are set up on the conveyor. This forms a shape detection area and a residual stress control area on the conveyor. The additively manufactured product is first transported outward by the conveyor.

[0045] When the product is delivered to the shape detection area, the detection equipment is used to detect the product, thereby analyzing the product contour data and stress distribution data, and transmitting the data to the controller. The controller uses the data to obtain control parameters such as temperature, heat preservation time, vibration frequency, and vibration time.

[0046] When the product is delivered to the residual stress control area, it is pushed onto the vibration table of the low-frequency thermal vibration composite prototype. Then, the low-frequency thermal vibration composite prototype is controlled according to the control parameters to control the residual stress on the product.

[0047] However, when the products conveyed on the conveyor are pushed onto the vibration table, the pushed products are prone to deviation, which causes misalignment between the products and the vibration table. This prevents the products from being properly controlled for residual stress, thus affecting the working effect.

[0048] To solve the above problems, such as Figure 1 , Figure 2 and Figure 4As shown, a low-frequency thermal vibration composite prototype for residual stress regulation is provided, including a base cabinet 1 installed at the outer end of a conveyor. A groove 11 is formed by recessing the upper surface of the base cabinet 1 downwards, and the groove 11 provides installation space for the vibration plate 6.

[0049] The vibrating plate 6, whose upper end face coincides with the upper end face of the base cabinet 1, is movably set inside the groove 11. The movable part of the vibrator 7, whose fixed part is installed at the top of the inside of the base cabinet 1, passes through the base cabinet 1 and is connected to the vibrating plate 6. The vibrating plate 6 is made to vibrate through the vibrator 7.

[0050] A U-shaped limiting plate 61, whose transverse part is located at the upper front edge of the vibrating plate 6 and below the pressure plate 83, is installed on the upper edge of the vibrating plate 6. The U-shaped limiting plate 61 restricts the product placed on the vibrating plate 6.

[0051] Two guide plates 62, which are integrated with the U-shaped limiting plate 61, are respectively set on the two longitudinal parts of the U-shaped limiting plate 61. The two guide plates 62 installed on the upper rear side of the vibration plate 6 have a V-shaped structure with a narrow front and a wide rear. The two guide plates 62 work together to facilitate guiding the product into the U-shaped limiting plate 61.

[0052] When the product is conveyed to the residual stress control area, the product on the conveyor is pushed onto the vibrating plate 6 on the base cabinet 1. The product is first guided by two guide plates 62, so that the product enters the U-shaped limiting plate 61, thereby positioning and pushing the product to the upper end of the vibrating plate 6, effectively avoiding misalignment between the product and the vibrating table, ensuring the working effect, and then the product pushed into the upper end of the vibrating plate 6 is clamped and heated.

[0053] Then the vibrator 7 is activated, which drives the vibrating plate 6 to vibrate continuously, thereby applying a certain frequency and magnitude of excitation force to the product at a specific temperature, thereby regulating the residual stress on the product.

[0054] Example 2, as Figure 1 , Figure 2 and Figure 7 As shown, the two vertical parts of the inverted U-shaped frame 3 are both set on the upper end of the cabinet 1, and the sealing element set at the lower end of the heat insulation cover 2 is attached to the upper end of the cabinet 1. At this time, the heat insulation cover 2 is located inside the inverted U-shaped frame 3. The heat insulation cover 2 and the cabinet 1 are sealed together by the sealing element. The sealing element can be a frame rubber gasket 26.

[0055] The heat-conducting cylinder 27, whose lower end is mounted on the inner wall of the heat insulation cover 2, is installed on the top inside the heat insulation cover 2. The functional plate 8 and the pressure plate 83 are movably set inside the heat-conducting cylinder 27, while the groove 11 is located inside the heat-conducting cylinder 27. Then, the frame heater 28 located inside the heat insulation cover 2 is installed on the outer end of the heat-conducting cylinder 27.

[0056] After the product is positioned on the upper end of the vibration plate 6, the heat insulation cover 2 is attached to the upper end of the bottom cabinet 1. At this time, the product is located inside the heat conduction cylinder 27. Then, the frame heater 28 is activated, so that the inside of the heat conduction cylinder 27 is heated to a suitable temperature, which will heat the product and thus perform thermal vibration treatment on the product.

[0057] Example 3, as Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, the first magnetic plate 81 is placed on the lower middle part of the functional plate 8, and the second magnetic plate 82 located directly below the first magnetic plate 81 is arranged to repel the first magnetic plate 81. The pressure plate 83 is installed on the lower end of the second magnetic plate 82. The first magnetic plate 81 and the second magnetic plate 82 work together to apply pressure to the pressure plate 83.

[0058] Then, four guides located outside the first magnetic plate 81 and outside the second magnetic plate 82 are respectively set at the four corner positions between the lower end of the functional plate 8 and the upper end of the pressure plate 83. The four guides work together to connect the functional plate 8 and the pressure plate 83 on the one hand, and guide the movement of the pressure plate 83 on the other hand. The guides can be telescopic rods 84.

[0059] The round rod 5 extending from the upper side of the heat insulation cover 2 is installed on the upper middle part of the functional plate 8. The movable part of the lifting device, whose fixing part is located at the upper middle part of the inverted U-shaped frame 3, passes through the inverted U-shaped frame 3 and is connected to the round rod 5. The round rod 5 is driven to move up and down through the lifting device, wherein the lifting device can be an electric push rod 4.

[0060] Multiple through slots 51 are formed by recessing the right end of the round rod 5 to the left. The limiting plate 53, which is attached to the upper end of the heat insulation cover 2 and located below the connecting pipe 29, passes through the through slots 51. The through slots 51 provide installation space for the limiting plate 53 and adjust the installation position of the limiting plate 53 on the round rod 5.

[0061] Two limiting bolts 52, which are respectively attached to the left and right ends of the round rod 5, are symmetrically threaded onto the upper end of the limiting plate 53. The two limiting bolts 52 work together to limit the installation position of the limiting plate 53, preventing the limiting plate 53 from detaching and ensuring good stability.

[0062] Two vertically arranged guide rods 22 located on the left and right sides of the limiting plate 53 are symmetrically set on the upper end of the heat insulation cover 2, and the two guide rods 22 that pass through the inverted U-shaped frame 3 are slidably connected to the inverted U-shaped frame 3. The two guide rods 22 work together to guide the movement of the heat insulation cover 2.

[0063] Multiple sealing rings 201 located in the annular groove are equidistantly fitted onto the outer end of the round rod 5. The annular groove is opened on the heat insulation cover 2. The annular groove provides installation space for the sealing rings 201. Multiple sealing rings 201 work together to make the round rod 5 and the heat insulation cover 2 sealed together.

[0064] After the product is positioned on the upper end of the vibrating plate 6, the lifting device is started, and the round rod 5 is driven to move downward, thereby causing the heat insulation cover 2 to move down and fit against the upper end of the cabinet 1. Then the round rod 5 continues to move downward, causing the limiting plate 53 to move down, so that the limiting plate 53 contacts and presses against the upper end of the heat insulation cover 2, thereby making the heat insulation cover 2 and the cabinet 1 in close contact.

[0065] Additionally, the downward movement of the round rod 5 causes the clamping structure formed by the functional plate 8, the first magnetic plate 81, the second magnetic plate 82, and the pressure plate 83 to move downward along the guide cylinder. When the pressure plate 83 contacts and is blocked from the upper end of the product, the functional plate 8 and the first magnetic plate 81 continue to move downward. After the limiting plate 53 contacts the upper end of the heat insulation cover 2, the functional plate 8 moves downward to the limiting position. At this time, the repulsive force generated between the first magnetic plate 81 and the second magnetic plate 82 will apply pressure to the pressure plate 83, thereby clamping the product.

[0066] Then, the clamped product is heated to a predetermined temperature using the frame heater 28. Then, the vibrating plate 6 is driven to move up and down in a cyclical manner by the vibrator 7. When the vibrating plate 6 moves up, the product, the pressure plate 83 and the second magnetic plate 82 will move up. When the vibrating plate 6 moves down, the pressure plate 83 and the product will move down under the repulsive force generated between the first magnetic plate 81 and the second magnetic plate 82. In this way, the product is subjected to force at both the top and bottom ends.

[0067] When the product is subjected to excitation force, the residual stress on the product will be regulated, and the force on the upper part of the product will be used to compensate for the excitation force, effectively preventing the upper part of the product from being reduced by the excitation force and improving the regulation effect.

[0068] A limiting bolt 52 can be rotated to separate the limiting bolt 52 from the limiting plate 53. Then the limiting plate 53 can be removed from the through groove 51. The limiting plate 53 can then pass through the through groove 51 at a suitable position. The disassembled limiting bolt 52 can then be re-threaded onto the limiting plate 53. This allows the adjustment function plate 8 to move down to meet the needs of products of different heights, providing good functionality.

[0069] After the residual stress on the product is adjusted, the lifting device is used to move the round rod 5 upward, thereby moving the limiting plate 53, the functional plate 8, the pressure plate 83 and other components upward. When the functional plate 8 contacts the top of the inside of the heat insulation cover 2, the round rod 5, the functional plate 8 and other components continue to move upward, causing the heat insulation cover 2 to move upward along with the functional plate 8, thereby completely exposing the product.

[0070] The lifting device is used to drive the clamping operation of the product on the one hand, and to drive the heat insulation cover 2 to move up and down on the other hand. It can also apply pressure to the heat insulation cover 2, reduce equipment costs, and has good functionality.

[0071] In Example 4, after the residual stress on the product is adjusted, in order to protect the operators who take the product, the hot air generated in the heat shield 2 is usually discharged first and the product is cooled. However, the discharged hot air is wasted and will affect the resource utilization rate.

[0072] To solve the above problems, such as Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the air extractor 21 located in front of the inverted U-shaped frame 3 is set on the upper front side of the heat insulation cover 2, and the top of the heat insulation cover 2 is connected to the inlet of the air extractor 21. The air extractor 21 is used to extract the hot air inside the heat insulation cover 2.

[0073] Multiple air inlet pipes 25, with their front ends passing through the heat insulation cover 2 and connected to the heat conduction cylinder 27, are equidistantly arranged on the lower rear side of the heat insulation cover 2. The multiple air inlet pipes 25 work together to compensate the outside air into the heat insulation cover 2. On the one hand, this avoids the pressure difference between the inside and outside of the heat insulation cover 2, thus protecting the heat insulation cover 2. On the other hand, it generates airflow inside the heat insulation cover 2, and the airflow blows on the product surface, making the product cool down quickly, which is used to assist in the product removal operation.

[0074] The protective box 23 located behind the inverted U-shaped frame 3 is installed on the upper rear side of the heat insulation cover 2, and the airbag 234 is installed inside the lower side of the protective box 23. The airbag 234 can be protected by the protective box 23. Then, the connecting pipe 29, which is connected to the outlet of the air pump 21, is located outside the round rod 5 and has a one-way valve, passes through the protective box 23 and is connected to the airbag 234. The extracted hot air is delivered into the airbag 234 through the connecting pipe 29, so as to temporarily store the hot air.

[0075] Multiple jet pipes 24 with control valves and arranged at an angle with the front higher than the rear are equidistantly placed on the rear end of the protective box 23. The jet pipes 24 passing through the protective box 23 are connected to the airbag 234. The multiple jet pipes 24 work together to discharge the hot air temporarily stored in the airbag 234 for preheating the product.

[0076] The third magnetic plate 231 is placed on the top of the inside of the protective box 23, while the fourth magnetic plate 232, located directly below the third magnetic plate 231, is arranged to repel each other. The movable plate 233, which is slidably connected inside the protective box 23, is placed on the lower end of the fourth magnetic plate 232. The airbag 234 is then attached to the lower end of the movable plate 233. The third magnetic plate 231 and the fourth magnetic plate 232 work together to apply pressure to the airbag 234.

[0077] After the residual stress on the product is adjusted, the vacuum pump 21 is started to extract the hot air from the heat insulation cover 2. The extracted hot air is then transported to the airbag 234 through the connecting pipe 29, causing the airbag 234 to expand. This drives the movable plate 233 and the fourth magnetic plate 232 to move upward, reducing the distance between the third magnetic plate 231 and the fourth magnetic plate 232. This results in a gradually increasing repulsive force between the third magnetic plate 231 and the fourth magnetic plate 232. At this time, the airbag 234 is used to temporarily store the extracted hot air.

[0078] When the products on the conveyor are pushed onto the vibrating plate 6 on the base cabinet 1, the control valve on the jet pipe 24 is opened. At this time, the repulsive force generated between the third magnetic plate 231 and the fourth magnetic plate 232 will cause the movable plate 233 to move down, thereby applying pressure to the air bag 234. This causes the hot air in the air bag 234 to blow onto the pushed products through multiple jet pipes 24, thereby preheating the products and reducing the heating time of subsequent products. This is used to assist in the subsequent heating operation of the products. The extracted hot air is used to preheat the products, thereby improving energy utilization.

[0079] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-frequency thermal vibration composite prototype for residual stress control, characterized in that: Includes a base cabinet (1) installed at the outer end of the conveyor. The upper end of the base cabinet (1) is recessed downward to form a groove (11). A vibrating plate (6) is movably installed inside the groove (11), and the upper end of the vibrating plate (6) coincides with the upper end of the base cabinet (1). The fixed part of the vibrator (7) is installed at the top inside the base cabinet (1), and the movable part of the vibrator (7) passes through the base cabinet (1) and is connected to the vibrating plate (6). The upper end of the cabinet (1) is provided with two vertical parts of the inverted U-shaped frame (3), the upper end of the cabinet (1) is attached to the heat insulation cover (2), and the heat insulation cover (2) is located inside the inverted U-shaped frame (3). The inner wall of the heat insulation cover (2) is equipped with a heating element, and the groove (11) is located inside the heating element. The inner wall of the heating element is slidably connected to a functional plate (8). A first magnetic plate (81) is provided at the middle of the lower end of the functional plate (8). A second magnetic plate (82) is installed directly below the first magnetic plate (81). The first magnetic plate (81) and the second magnetic plate (82) are arranged to repel each other. A pressure plate (83) is installed at the lower end of the second magnetic plate (82). The pressure plate (83) is slidably connected to the inner wall of the heating element. The pressure plate (83) is located directly above the vibrating plate (6). The upper middle part of the functional board (8) is equipped with a connector, and the connector extends out of the upper side of the heat insulation cover (2). The upper middle part of the inverted U-shaped frame (3) is provided with a fixed part of the lifting device, and the movable part of the lifting device passes through the inverted U-shaped frame (3) and is connected to the connector. The heat insulation cover (2) is provided with a preheating component at its upper end, and the preheating component is located outside the connector; The preheating component includes an air extractor (21), which is located on the front side of the upper end of the heat insulation cover (2) and on the front side of the inverted U-shaped frame (3). Multiple air inlet pipes (25) are equidistantly connected to the lower rear end of the heat insulation cover (2). A protective box (23) is installed on the rear side of the upper end of the heat insulation cover (2), and the protective box (23) is located on the rear side of the inverted U-shaped frame (3). An airbag (234) is installed on the lower side inside the protective box (23). The inlet of the air pump (21) is connected to the top of the heat insulation cover (2), and the outlet of the air pump (21) is connected to a connecting pipe (29) with a one-way valve. The other end of the connecting pipe (29) passes through the protective box (23) and is connected to the airbag (234). The connecting pipe (29) is located on the outside of the connector.

2. The low-frequency thermal vibration composite prototype for residual stress control according to claim 1, characterized in that: The protective box (23) has multiple jet pipes (24) arranged at equal intervals at the rear end, with the front higher and the rear lower, and a control valve is installed on the jet pipes (24). The jet pipes (24) pass through the protective box (23) and are arranged in communication with the airbag (234). The protective box (23) has a third magnetic plate (231) at the top inside, and a fourth magnetic plate (232) is installed directly below the third magnetic plate (231). The fourth magnetic plate (232) and the third magnetic plate (231) are arranged to repel each other. The lower end of the fourth magnetic plate (232) has a movable plate (233) which is slidably connected inside the protective box (23). The movable plate (233) is attached to the upper end of the airbag (234).

3. The low-frequency thermal vibration composite prototype for residual stress control according to claim 1, characterized in that: The connector includes a round rod (5), which is installed in the middle of the upper end of the functional plate (8) and extends out of the upper side of the heat insulation cover (2). The movable part of the lifting device is connected to the round rod (5). The right end of the round rod (5) is recessed to the left to form multiple through grooves (51), and the through grooves (51) penetrate the round rod (5). The upper end of the heat insulation cover (2) is attached to the limiting plate (53), and the limiting plate (53) penetrates the through grooves (51). The limiting plate (53) is located on the lower side of the connecting pipe (29). The upper end of the limiting plate (53) is symmetrically threaded with two limiting bolts (52), and the two limiting bolts (52) are respectively attached to the left and right ends of the round rod (5).

4. A low-frequency thermal vibration composite prototype for residual stress control according to claim 3, characterized in that: Two guide rods (22) are symmetrically arranged at the upper end of the heat insulation cover (2), and the guide rods (22) are arranged vertically. Both guide rods (22) pass through the inverted U-shaped frame (3), and the guide rods (22) are slidably connected to the inverted U-shaped frame (3). The two guide rods (22) are located on the left and right sides of the limiting plate (53). Multiple sealing rings (201) are equidistantly fitted on the outer end of the round rod (5), and the sealing rings (201) are located in the annular groove, which is opened on the heat insulation cover (2).

5. A low-frequency thermal vibration composite prototype for residual stress control according to claim 1, characterized in that: The heating element includes a heat-conducting cylinder (27), which is installed on the top of the inside of the heat insulation cover (2), and the lower end of the heat-conducting cylinder (27) is installed on the inner wall of the heat insulation cover (2). A functional plate (8) and a pressure plate (83) are movably arranged inside the heat-conducting cylinder (27). The heat-conducting cylinder (27) has a groove (11) inside. A frame heater (28) is installed at the outer end of the heat-conducting cylinder (27), and the frame heater (28) is located inside the heat insulation cover (2). The front end of the air inlet pipe (25) passes through the heat insulation cover (2) and is connected to the heat-conducting cylinder (27).

6. A low-frequency thermal vibration composite prototype for residual stress control according to claim 1, characterized in that: A U-shaped limiting plate (61) is installed at the upper edge of the vibrating plate (6), and the lateral part of the U-shaped limiting plate (61) is located at the upper front edge of the vibrating plate (6). The U-shaped limiting plate (61) is located below the pressure plate (83). The two longitudinal ends of the U-shaped limiting plate (61) are provided with guide plates (62), and the guide plates (62) and the U-shaped limiting plate (61) are integrated. The two guide plates (62) are arranged in a V-shape with a narrow front and a wide rear, and the guide plates (62) are installed on the rear side of the upper end of the vibration plate (6).

7. A low-frequency thermal vibration composite prototype for residual stress control according to claim 1, characterized in that: Guides are provided at the four corner positions between the lower end of the functional plate (8) and the upper end of the pressure plate (83), and the guides are located outside the first magnetic plate (81) and outside the second magnetic plate (82).

8. A low-frequency thermal vibration composite prototype for residual stress control according to claim 1, characterized in that: The heat insulation cover (2) is provided with a sealing element at the lower end, and the sealing element is attached to the upper end of the cabinet (1).

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