Plate preheater plate punching and stamping integrated forming equipment

Abstract

The application discloses a plate-type preheater plate punching and stamping integrated forming equipment, which integrates punching and stamping procedures in the same station and the same die, and punching and stamping actions are completed in turn in a one-time downstroke process of an upper die, so that the plate does not need to be repositioned in the whole forming process, secondary positioning errors are eliminated, and the forming precision and size consistency of the plate are improved; the independent punching equipment and the intermediate conveying link are omitted through integrated design, the equipment covers a smaller area, equipment investment cost is reduced, the punching tool assembly is installed through an elastic buffering device, the punching force can be self-adaptively adjusted, plate edge deformation caused by excessive punching force is avoided, the material can enter a warm forming interval through heating of the heating device, defects such as cracks, wrinkles or insufficient filling are avoided, the plate has sufficient pressure resistance and heat exchange efficiency in use, and the plate-type preheater plate forming precision and production efficiency are improved.

Description

Technical Field

[0001] This invention relates to the technical field of plate preheater plate processing equipment, and in particular to the technical field of an integrated forming equipment for plate preheater plate punching and stamping. Background Technology

[0002] A plate preheater is a high-efficiency preheater composed of a series of metal plates with a certain corrugated shape. Thin rectangular channels are formed between the various plates, and heat exchange occurs through the plates. It is mainly used for heat transfer between two or more fluids that come into thermal contact at different temperatures, or between a solid surface and a fluid, or between solid particles and a fluid. It is an ideal device for liquid-liquid and liquid-vapor heat exchange. In the plate production process of plate preheaters, the plates need to be stamped to form the required corrugated shape. In the existing technology, the conventional forming system mainly consists of a conveying system, a punching system, and a stamping system. The raw material of the plate is conveyed to the punching system and the stamping system in sequence. The punching system first completes the punching of a fixed size, and the punched plate is then transported to the stamping system for stamping and shaping to obtain the formed plate.

[0003] Application number CN202211621373.1 discloses a high-pressure plate heat exchanger plate forming system and processing method. The system uses an integrated uncoiling, leveling, and shearing machine to cut steel plates. A robotic arm picks up the cut steel plates and places them onto an automatic centering and clamping mechanism. A laser detector performs random inspection. Qualified products are laminated by a laminating machine, while unqualified products are placed in a waste collection bin. After lamination, the steel plates are pressed into sheets by a CNC high-pressure hydraulic press, and the film is collected by a first film-tearing machine. The sheets are then punched by a CNC high-pressure blanking machine. The formed sheets are picked up by a robotic arm and placed into a second automatic centering and clamping mechanism. A second laser detector performs random inspection. Qualified products are transported to the next process by an AGV (Automated Guided Vehicle), while unqualified products are placed in a waste collection bin. Steel plates or sheets are transported between different machines via robotic arms.

[0004] Application number CN202322431070.X discloses a preheater plate hydraulic forming device, including a base, a limiting mold seat on the top wall of the base, a lower template on the inner wall of the limiting mold seat, action frames on the left and right side walls of the lower template, an upper template on the inner wall of the action frame, and action springs on the left and right sides of the bottom wall of the inner cavity of the limiting mold seat. This new solution can facilitate the lifting of the formed plate by setting up the base, limiting mold seat and lower template, which makes it easier for workers to load and unload the material.

[0005] However, the existing technology has the following shortcomings: First, the equipment occupies a large space and is costly. Using the above-mentioned stamping forming method, not only is a conveying device required in the input direction of the stamping equipment, but also a separate punching and cutting device is needed, which increases the space occupied by the equipment and the manufacturing cost. Second, the process connection is not smooth. After the sheet metal is punched, it needs to be repositioned and transported to the stamping system. Multiple positioning causes cumulative errors, affecting the forming accuracy of the sheet metal. Multiple clamping results in low production efficiency. Third, it has poor adaptability to thin sheet materials. Plate heat exchanger plates are usually made of stainless steel sheets with a thickness of 0.5mm-1.5mm. Existing equipment is prone to causing the sheet metal to warp and deform during the punching and stamping process, which affects the subsequent stacking assembly and welding quality. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art and to propose an integrated forming equipment for plate preheater plates, which can integrate the punching and stamping processes of plate preheater plates into the same station, reduce the space occupied by the equipment, avoid secondary positioning errors, and improve the forming accuracy and production efficiency of plate preheater plates.

[0007] To achieve the above objectives, this invention proposes an integrated forming equipment for plate preheater plate punching and stamping, comprising a frame, a hydraulic drive mechanism, an upper die assembly, an upper template, an elastic buffer assembly, a punching tool assembly, a stamping punch, a heating device, a lower die assembly, a lower template, a punching die, and a stamping die. The hydraulic drive mechanism is located at the top of the frame, and the upper die assembly is mounted at the bottom of the hydraulic drive mechanism. The upper die assembly includes an upper template, an elastic buffer assembly, a heating device, a punching tool assembly, and a stamping punch. A high thermal conductivity stamping punch is mounted at the bottom center of the upper template. The stamping punch is embedded with a heating device. Elastic buffer components are evenly arranged around the bottom edge of the upper die plate in an axial direction. A punching tool assembly is installed at the bottom end of the elastic buffer component. The initial height of the bottom end of the punching tool assembly is lower than the initial height of the bottom end of the stamping punch. A lower die assembly is installed at the lower part of the frame, directly opposite the upper die assembly. The lower die assembly includes a lower die plate, a punching die, and a stamping die. A punching die is arranged at the top edge of the lower die plate, directly opposite the punching tool assembly. A stamping die corresponding to the stamping punch is installed at the top center of the lower die plate.

[0008] Preferably, the elastic buffer assembly includes a tool mounting block, a buffer sleeve groove, a buffer spring, and a telescopic guide rod. A plurality of buffer springs are evenly axially arranged in the buffer sleeve groove. The bottom end of the buffer spring is mounted with the tool mounting block, and the bottom end of the tool mounting block is fixedly connected to the punching tool assembly. The upper part of the tool mounting block is slidably fitted in the buffer sleeve groove. A telescopic guide rod is axially inserted in the buffer spring. The top end of the telescopic guide rod is connected to the buffer sleeve groove, and the bottom end of the telescopic guide rod is connected to the tool mounting block.

[0009] Preferably, the lower template has a waste discharge hole that matches the contour shape of the punching die, and a guide isolation structure is provided between the punching tool assembly and the stamping punch.

[0010] Preferably, the lower surface of the stamping punch is provided with a first corrugated forming surface, and the stamping die of the lower die is provided with a second corrugated forming surface corresponding to the first corrugated forming surface. The surfaces of the first corrugated forming surface and the second corrugated forming surface are coated with Teflon coating. Both the first corrugated forming surface and the second corrugated forming surface are periodically undulating corrugated curved surfaces, and the peaks and troughs of the corrugations on the first corrugated forming surface and the second corrugated forming surface are smoothly transitioned.

[0011] Preferably, the first corrugated surface is provided with a plurality of air guiding microholes, which are connected to a compressed air source through a throttling solenoid valve. The bottom of the second corrugated surface is provided with a plurality of telescopic ejector rods, the top of which is provided with an elastic head, and the bottom of which is connected to an electric ejector cylinder.

[0012] Preferably, the punching tool assembly includes a tool template, a tool limiting groove, and a punching blade. The bottom of the tool template is provided with several vertically downward-facing tool limiting grooves. A punching blade of the same size is detachably installed in the tool limiting groove. A positioning threaded hole is provided through the side of the tool limiting groove. A positioning locking bolt is inserted into the positioning threaded hole and the positioning locking bolt laterally locks the punching blade.

[0013] Preferably, a plurality of plate positioning pins are evenly arranged around the top edge of the lower template, and the plate workpiece is provided with positioning holes corresponding to the positions of the plate positioning pins. The plate positioning pins are inserted into the positioning holes one by one, and the upper part of the plate positioning pins is provided with a tapered guide section.

[0014] Preferably, a plate limiting sleeve is provided at the bottom edge of the upper template corresponding to the plate positioning pin position. A sliding groove is provided axially at the bottom of the plate limiting sleeve. The sliding groove is fitted into the plate positioning pin vertically. The initial height of the bottom end of the plate limiting sleeve is lower than the initial height of the bottom end of the punching tool assembly.

[0015] Preferably, the heating device includes a temperature sensor and an electric heating tube. A plurality of heat-conducting perforations are evenly arranged inside the stamping punch. The electric heating tube is fixedly embedded in the heat-conducting perforations. The temperature sensor is embedded in the lower part of the stamping punch and is connected to the electric heating tube.

[0016] The beneficial effects of this invention are as follows: This invention integrates the punching and stamping processes into the same station and the same mold. The punching and stamping actions are completed sequentially during a single upper and lower die movement. The sheet metal does not require repositioning during the entire forming process, eliminating secondary positioning errors and improving the forming accuracy and dimensional consistency of the sheet metal. This invention reduces equipment space and manufacturing costs. Compared to existing technologies that require a separate punching device in the input direction of the stamping equipment, this invention eliminates the need for a separate punching device and intermediate conveying links through its integrated design. This reduces the equipment footprint and lowers investment costs. The sheet metal positioning pins and limiting sleeves, in conjunction with positioning holes, limit the sheet metal workpiece, preventing displacement or deformation during punching. The punching tool assembly is installed with an elastic buffer device, which can adaptively adjust the punching force to avoid damage caused by excessive punching force. The edge deformation of the plate material is a concern. Plate heat exchanger plates are commonly made of materials such as stainless steel and titanium alloys, which have high yield strength and significant work hardening at room temperature. Heating the material with a heating device allows it to enter the warm forming range, reducing the yield strength by 30%-50% and significantly improving plasticity. This makes it easier for the corrugations to fill the mold cavity, avoiding defects such as cracks, wrinkles, or insufficient filling. After cold stamping, the plate exhibits elastic recovery, causing the corrugation depth and angle to deviate from the design value. When heated and formed with a heating device, the material stress relaxation is accelerated, and the springback can be reduced by 50%-70%. Combined with pressure holding and cooling, this effectively fixes the shape and improves dimensional accuracy. Excessive local tensile stress during cold stamping can cause the plate to thin or even crack. Heating with a heating device makes the material flow more uniform, ensuring that the plate has sufficient pressure resistance and heat exchange efficiency during use, thus improving the forming accuracy and production efficiency of the plate preheater plates.

[0017] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a plate preheater plate punching and stamping integrated forming equipment according to the present invention; Figure 2 This is a schematic diagram of the assembly structure of the elastic buffer assembly and the punching tool assembly of the integrated forming equipment for plate preheater plate punching and stamping according to the present invention.

[0019] In the diagram: 1-Frame, 2-Hydraulic drive mechanism, 3-Upper mold assembly, 4-Upper template, 5-Elastic buffer assembly, 6-Punching tool assembly, 7-Punching punch, 8-Heating device, 9-Lower mold assembly, 10-Lower template, 11-Punching die, 12-Punching die, 13-Tool mounting block, 14-Buffer sleeve groove, 15-Buffer spring, 16-Telescopic guide sleeve, 17-First corrugated forming surface, 18-Second corrugated forming surface, 19-Air guide micro-hole, 20-Telescopic ejector rod, 21-Tool template, 22-Tool limiting groove, 23-Punching tool, 24-Sheet metal positioning pin, 25-Sheet metal limiting sleeve, 26-Temperature sensor, 27-Electric heating element. Detailed Implementation

[0020] Example 1 See Figure 1 and Figure 2This invention discloses an integrated forming equipment for punching and stamping plates of a plate preheater, comprising a frame 1, a hydraulic drive mechanism 2, an upper die assembly 3, an upper template 4, an elastic buffer assembly 5, a punching tool assembly 6, a stamping punch 7, a heating device 8, a lower die assembly 9, a lower template 10, a punching die 11, and a stamping die 12. The hydraulic drive mechanism 2 is mounted on the top of the frame 1, and the upper die assembly 3 is mounted on the bottom of the hydraulic drive mechanism 2. The upper die assembly 3 includes the upper template 4, the elastic buffer assembly 5, the heating device 8, the punching tool assembly 6, and the stamping punch 7. A high thermal conductivity stamping punch 7 is mounted at the bottom center of the upper template 4. The stamping punch 7 contains... A heating device 8 is embedded in the upper mold plate 4. Elastic buffer components 5 are evenly arranged around the bottom edge of the upper mold plate 4 along the axial direction. A punching tool assembly 6 is installed at the bottom end of the elastic buffer component 5. The initial height of the bottom end of the punching tool assembly 6 is lower than the initial height of the bottom end of the stamping punch 7. A lower mold assembly 9 is installed at the lower part of the frame 1, directly opposite the upper mold assembly 3. The lower mold assembly 9 includes a lower mold plate 10, a punching die 11, and a stamping die 12. The punching die 11 is located at the top edge of the lower mold plate 10, directly opposite the punching tool assembly 6. A stamping die 12, corresponding to the stamping punch 7, is installed at the top center of the lower mold plate 10. The elastic buffer component 8 is embedded in the upper mold plate 4. The buffer assembly 5 includes a tool mounting block 13, a buffer sleeve groove 14, a buffer spring 15, and a telescopic guide rod 16. A plurality of buffer springs 15 are evenly and axially arranged within the buffer sleeve groove 14. The bottom end of each buffer spring 15 is fitted with a tool mounting block 13, which is fixedly connected to the punching tool assembly 6. The upper part of the tool mounting block 13 slides within the buffer sleeve groove 14. A telescopic guide rod 16 is axially inserted within each buffer spring 15. The top end of the telescopic guide rod 16 is connected to the buffer sleeve groove 14, and the bottom end is connected to the tool mounting block 13. A waste material discharge opening is provided on the lower template 10. The waste material discharge hole matches the contour shape of the punching die 11. A guide isolation structure is provided between the punching tool assembly 6 and the stamping punch 7. The lower surface of the stamping punch 7 is provided with a first corrugated forming surface 17. The stamping die 12 of the lower template 10 is provided with a second corrugated forming surface 18 corresponding to the first corrugated forming surface 17. The surfaces of the first corrugated forming surface 17 and the second corrugated forming surface 18 are coated with Teflon coating. Both the first corrugated forming surface 17 and the second corrugated forming surface 18 are periodically undulating corrugated surfaces. The peaks and troughs of the corrugations of the first corrugated forming surface 17 and the second corrugated forming surface 18 are smoothly transitioned.

[0021] Example 2 See Figure 1 and Figure 2The first corrugated forming surface 17 is provided with a plurality of air guiding micro-holes 19, which are connected to a compressed air source through a throttling solenoid valve. The bottom of the second corrugated forming surface 18 is provided with a plurality of telescopic ejector rods 20, the top of which is provided with an elastic top head, and the bottom of which is connected to an electric ejector cylinder. The punching tool assembly 6 includes a tool template 21, a tool limiting groove 22 and a punching blade 23. The bottom of the tool template 21 is provided with a plurality of tool limiting grooves 22 with vertically downward openings. A punching blade 23 of the same size is detachably installed in the tool limiting groove 22. A positioning threaded hole is provided through the side of the tool limiting groove 22, and a positioning locking bolt is inserted in the positioning threaded hole. The positioning locking bolt laterally locks the punching blade 23.

[0022] Example 3 See Figure 1 The lower template 10 has multiple plate positioning pins 24 evenly arranged around its top edge. The plate workpiece has positioning holes corresponding to the plate positioning pins 24. The plate positioning pins 24 are inserted into the positioning holes one by one. The upper part of the plate positioning pins 24 has a tapered guide section. The bottom edge of the upper template 4 has a plate limiting sleeve 25 corresponding to the plate positioning pins 24. The bottom of the plate limiting sleeve 25 has a sliding groove axially arranged. The sliding groove is fitted with the plate positioning pins 24 vertically. The initial height of the bottom end of the plate limiting sleeve 25 is lower than the initial height of the bottom end of the punching tool assembly 6. The heating device 8 includes a temperature sensor 26 and an electric heating tube 27. The stamping punch 7 has a number of heat-conducting perforations evenly arranged inside. The electric heating tube 27 is fixedly embedded in the heat-conducting perforations. The temperature sensor 26 is embedded in the lower part of the stamping punch 7 and is connected to the electric heating tube 27.

[0023] The working process of this invention is as follows: The sheet metal workpiece is fed into the upper surface of the lower template 10. The sheet metal workpiece is positioned by the sheet metal positioning pin 24 and the positioning hole. The hydraulic drive mechanism 2 drives the upper mold assembly 3 to move downward. The sheet metal limiting sleeve 25 contacts the sheet metal positioning pin 24 to engage and press down, pressing the sheet metal workpiece down and limiting it on the lower template 10. The hydraulic drive mechanism 2 drives the upper mold assembly 3 to continue moving downward. The punching tool assembly 6 contacts the sheet metal workpiece and engages with the punching die 11 on the lower template 10 to complete the punching of the outer contour of the sheet metal workpiece. The waste generated by punching is discharged through the waste discharge hole. The hydraulic drive mechanism 2 drives the upper mold assembly 3 to continue moving downward. The punching punch 7 contacts the punched sheet metal workpiece. The heating device 8 counteracts the punching... The stamping punch 7 is heated to raise the temperature of the contact area between the sheet metal workpiece and the stamping punch 7 to a preset temperature. The stamping punch 7 cooperates with the stamping die 12 on the lower template 10 to extrude the sheet metal workpiece, causing it to undergo plastic deformation and form a preset corrugated shape. After the corrugation is formed, the hydraulic drive mechanism 2 drives the upper die assembly 3 to move upward. The air guide micro-hole 19 is connected to the compressed air source. When the upper die assembly 3 moves upward to demold, the compressed air is sprayed onto the surface of the sheet metal workpiece through the air guide micro-hole 19 to form an air cushion layer. The stamping punch 7, the punching tool assembly 6 and the sheet metal limiting sleeve 25 are separated from the sheet metal workpiece in sequence. The telescopic ejector rod 20 pushes the sheet metal workpiece out of the stamping die 12 for demolding and removes the formed plate preheater plate.

[0024] This invention integrates the punching and stamping processes into the same station and mold. The punching and stamping actions are completed sequentially during a single upper die descent. The sheet metal does not require repositioning during the entire forming process, eliminating secondary positioning errors and improving the forming accuracy and dimensional consistency of the sheet metal. This invention reduces equipment space and manufacturing costs. Compared to existing technologies that require a separate punching device in the input direction of the stamping equipment, this invention eliminates the need for a separate punching device and intermediate conveying links through its integrated design, reducing the equipment footprint and investment costs. The sheet metal positioning pin 24 and the sheet metal limiting sleeve 25, in conjunction with the positioning hole, limit the sheet metal workpiece, preventing displacement or deformation during punching. The punching tool assembly 6 is installed with an elastic buffer device, which can adaptively adjust the punching force to avoid damage caused by excessive punching force. Excessive shear force can cause edge deformation of the plate. Plate heat exchanger plates are commonly made of materials such as stainless steel and titanium alloy, which have high yield strength and significant work hardening at room temperature. Heating with heating device 8 allows the material to enter the warm forming range, reducing the yield strength by 30%-50% and significantly improving plasticity. The corrugations are more likely to fill the mold cavity, avoiding defects such as cracks, wrinkles, or insufficient filling. After cold stamping, the plate exhibits elastic recovery, causing the corrugation depth and angle to deviate from the design value. When heated by heating device 8, the material stress relaxation is accelerated, and the springback can be reduced by 50%-70%. Combined with pressure holding and cooling, the shape can be effectively fixed, and the dimensional accuracy can be improved. Excessive local tensile stress during cold stamping can cause the plate to thin or even crack. After heating with heating device 8, the material flows more evenly, ensuring that the plate has sufficient pressure resistance and heat exchange efficiency during use.

[0025] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A plate preheater plate punching and stamping integrated forming equipment, characterized in that: The machine includes a frame (1), a hydraulic drive mechanism (2), an upper die assembly (3), an upper template (4), an elastic buffer assembly (5), a punching tool assembly (6), a stamping punch (7), a heating device (8), a lower die assembly (9), a lower template (10), a punching die (11), and a stamping die (12). The frame (1) is equipped with a hydraulic drive mechanism (2) at its top. The upper die assembly (3) is installed at the bottom of the hydraulic drive mechanism (2). The upper die assembly (3) includes an upper template (4), an elastic buffer assembly (5), a heating device (8), a punching tool assembly (6), and a stamping punch (7). A high thermal conductivity stamping punch (7) is installed at the bottom center of the upper template (4). The stamping punch (7) is embedded with a heating device. The upper template (4) is uniformly surrounded by an elastic buffer assembly (5) at its bottom edge. A punching tool assembly (6) is installed at the bottom end of the elastic buffer assembly (5). The initial height of the bottom end of the punching tool assembly (6) is lower than the initial height of the bottom end of the stamping punch (7). A lower die assembly (9) is installed at the lower part of the frame (1) directly opposite the upper die assembly (3). The lower die assembly (9) includes a lower template (10), a punching die (11), and a stamping die (12). A punching die (11) is provided at the top edge of the lower template (10) directly opposite the punching tool assembly (6). A stamping die (12) corresponding to the stamping punch (7) is installed at the top middle position of the lower template (10).

2. The integrated forming equipment for plate cutting and stamping of plate preheater sheets as described in claim 1, characterized in that: The elastic buffer assembly (5) includes a tool mounting block (13), a buffer sleeve groove (14), a buffer spring (15), and a telescopic guide rod (16). Several buffer springs (15) are evenly axially arranged in the buffer sleeve groove (14). The bottom end of the buffer spring (15) is equipped with a tool mounting block (13). The bottom end of the tool mounting block (13) is fixedly connected to the punching tool assembly (6). The upper part of the tool mounting block (13) is slidably fitted in the buffer sleeve groove (14). The telescopic guide rod (16) is axially inserted in the buffer spring (15). The top end of the telescopic guide rod (16) is connected to the buffer sleeve groove (14), and the bottom end of the telescopic guide rod (16) is connected to the tool mounting block (13).

3. The integrated forming equipment for plate cutting and stamping of plate preheater sheets as described in claim 1, characterized in that: The lower template (10) has a waste discharge hole, which matches the outline shape of the punching die (11). A guide isolation structure is provided between the punching tool assembly (6) and the stamping punch (7).

4. The integrated forming equipment for plate cutting and stamping of plate preheater sheets as described in claim 1, characterized in that: The lower surface of the stamping punch (7) is provided with a first corrugated forming surface (17), and the stamping die (12) of the lower template (10) is provided with a second corrugated forming surface (18) corresponding to the first corrugated forming surface (17). The surfaces of the first corrugated forming surface (17) and the second corrugated forming surface (18) are coated with Teflon coating. The first corrugated forming surface (17) and the second corrugated forming surface (18) are both periodically undulating corrugated surfaces. The corrugations of the first corrugated forming surface (17) and the second corrugated forming surface (18) are smoothly transitioned between the crests and troughs.

5. The integrated forming equipment for plate cutting and stamping of plate preheater sheets as described in claim 4, characterized in that: The first corrugated surface (17) is provided with a plurality of air guiding microholes (19), which are connected to the compressed air source through a throttling solenoid valve. The bottom of the second corrugated surface (18) is provided with a plurality of telescopic ejector rods (20), the top of the telescopic ejector rods (20) is provided with an elastic top, and the bottom of the telescopic ejector rods (20) is connected to an electric ejector cylinder.

6. The integrated forming equipment for plate cutting and stamping of plate preheater sheets as described in claim 1, characterized in that: The punching tool assembly (6) includes a tool template (21), a tool limiting groove (22), and a punching blade (23). The bottom of the tool template (21) is provided with several tool limiting grooves (22) with vertical openings facing downwards. A punching blade (23) of the same size is detachably installed in the tool limiting groove (22). A positioning threaded hole is provided through the side of the tool limiting groove (22). A positioning locking bolt is inserted in the positioning threaded hole. The positioning locking bolt locks the punching blade (23) laterally.

7. The integrated forming equipment for plate cutting and stamping of plate preheater sheets as described in claim 1, characterized in that: The lower template (10) is uniformly surrounded by multiple plate positioning pins (24) at the top edge. The plate workpiece is provided with positioning holes corresponding to the plate positioning pins (24). The plate positioning pins (24) are inserted into the positioning holes one by one. The upper part of the plate positioning pins (24) is provided with a tapered guide section.

8. The integrated forming equipment for plate cutting and stamping of plate preheater sheets as described in claim 7, characterized in that: The bottom edge of the upper template (4) is provided with a plate limiting sleeve (25) corresponding to the plate positioning pin (24). The bottom of the plate limiting sleeve (25) is provided with a sliding sleeve groove, which is fitted with the plate positioning pin (24) in a corresponding manner. The initial height of the bottom end of the plate limiting sleeve (25) is lower than the initial height of the bottom end of the punching tool assembly (6).

9. The integrated forming equipment for plate cutting and stamping of plate preheater sheets as described in claim 7, characterized in that: The heating device (8) includes a temperature sensor (26) and an electric heating tube (27). A plurality of heat-conducting perforations are uniformly arranged inside the stamping die (7). The electric heating tube (27) is fixedly embedded in the heat-conducting perforations. The temperature sensor (26) is embedded in the lower part of the stamping die (7). The temperature sensor (26) is connected to the electric heating tube (27).

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