Sheet metal stamping apparatus based on low-temperature embrittlement and pre-marking guidance

Abstract

The application discloses a kind of based on low temperature embrittlement cooperates prefabricated mark guide plate stamping equipment, including base and the shelf plate of being movably arranged on base, the holding module for being clamped and positioning outside the processing area of tensioning the plate to be processed of outside the plate to be processed is arranged between the base and shelf plate, and the groove prefabricated module for processing V-shaped guide groove to outside the plate to be processed preset fracture zone, the low-temperature cooling module for the plate after being processed by groove prefabricated module is arranged on the side of base, to reduce the temperature of plate and maintain low-temperature atmosphere by being used for rapid cooling, and the control cabinet for being respectively communicated connection control with holding module, groove prefabricated module and low-temperature cooling module.The application solves the problem that traditional stamping process handles high-strength alloy plate and the outer ring component of difficult deformation material, because prefabricated mark processing, low-temperature treatment and stamping forming link discrete layout lead to parameter matching, low-temperature embrittlement uncontrollable, difficult to realize the problem of accurate control of fracture surface quality.

Description

Technical Field

[0001] This invention relates to the field of sheet metal stamping equipment technology, specifically to a sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance. Background Technology

[0002] In the field of precision stamping of sheet metal, outer ring components, as key structural units, directly determine the assembly accuracy, mechanical properties, and service life of products due to their cross-sectional quality (such as fracture morphology, burr height, and corner collapse dimensions). This is one of the core technological bottlenecks restricting the quality improvement of key components in high-end equipment manufacturing. Traditional stamping processes often suffer from defects such as cross-sectional tearing and lamellar separation when forming outer rings of high-strength alloy sheets and difficult-to-deform materials due to the limited plastic deformation capacity of the materials. Especially under low-temperature conditions, the uncontrollable embrittlement characteristics of the materials further exacerbate the instability of cross-sectional quality, making it difficult to meet the requirements of high-precision manufacturing in terms of part yield and process reliability.

[0003] Currently, low-temperature embrittlement control technology provides a novel approach to optimizing stamping cross-sectional morphology by precisely intervening in the dynamic fracture behavior of materials. Meanwhile, the pre-mark guidance strategy relies on a preset stress gradient field to directionally constrain crack propagation paths. The synergistic mechanism of these two technologies shows significant potential for solving the cross-sectional quality problem in outer ring forming. However, existing equipment systems lack dedicated designs for such integrated processes. To achieve the synergistic effect of low-temperature embrittlement and pre-mark guidance in current production processes, it is often difficult to overcome the limitations of the discrete layout of pre-mark processing, low-temperature treatment, and stamping stages. This layout leads to poor matching of process parameters in each stage, making synergistic control difficult and preventing precise control of cross-sectional quality under multi-physics coupling. This severely restricts the engineering application of the low-temperature embrittlement-pre-mark guidance synergistic process in precision outer ring forming. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance. This addresses the problem that traditional stamping processes for high-strength alloy sheets and difficult-to-deform outer ring components suffer from poor parameter matching and uncontrollable low-temperature embrittlement due to the discrete layout of pre-mark processing, low-temperature treatment, and stamping forming stages, making it difficult to achieve precise control of cross-sectional quality.

[0005] To achieve the above objectives, the present invention provides a sheet metal stamping device based on low-temperature embrittlement synergistic pre-mark guidance, comprising a base and a frame plate movably disposed on the base. Between the base and the frame plate are a holding module for clamping, positioning and tensioning the sheet metal to be processed in the processing area, and a groove prefabrication module for processing V-shaped guide grooves in the pre-set fracture area of ​​the sheet metal to be processed. On one side of the base are a low-temperature cooling module for rapidly cooling the sheet metal processed by the groove prefabrication module to reduce the sheet metal temperature and maintain a low-temperature atmosphere, and a control cabinet for communicating and controlling the holding module, the groove prefabrication module and the low-temperature cooling module respectively.

[0006] The advantages of adopting the above technical solution are as follows: The integration of the holding module, groove prefabrication module, cryogenic cooling module, and control cabinet into a single unit effectively breaks the limitations of the discrete layout of each stage in traditional processes, achieving synergistic linkage between various functional modules. Specifically, the holding module can precisely clamp and position the sheet metal to be processed and tension the processing area, preventing displacement or deformation of the sheet metal during subsequent processing. This provides a stable processing benchmark for groove prefabrication, cooling, and stamping processes, ensuring consistent precision across all processes. The groove prefabrication module processes V-shaped guide grooves in the pre-set fracture area of ​​the sheet metal, inducing cracks to propagate along a predetermined path through a pre-set structure, structurally laying the foundation for improving the quality of the stamped cross-section. The cryogenic cooling module can rapidly cool the sheet metal after groove prefabrication and maintain a low-temperature atmosphere, enhancing the material's embrittlement effect, suppressing ductile deformation, and reducing defects such as burrs and tear strips during stamping. The control cabinet communicates with each module to achieve centralized control, precisely coordinating the operating rhythm of each module and ensuring the orderly connection of actions such as clamping and positioning, V-groove processing, and cryogenic cooling, avoiding mismatches in process parameters at each stage. By setting up the above structure, the reliability of the process and the product qualification rate are significantly improved. It can adapt to the processing needs of outer ring components of high-strength alloy plates and difficult-to-deform materials, promote the engineering application of low-temperature embrittlement-pre-mark guided collaborative process, and provide equipment support for the high-quality forming of key components in high-end equipment manufacturing.

[0007] The present invention further comprises: the holding module including two sets of symmetrically arranged clamps and a workpiece reference support platform disposed between the two clamps; the clamps are composed of an upper clamping plate and a lower clamping plate; the lower clamping plate is detachably connected to the base; an adjustment shaft is rotatably provided at each of the four corners of the base; an adjustment hole is provided on the frame plate corresponding to each adjustment shaft position; each adjustment shaft is threadedly connected to its corresponding adjustment hole; a drive structure is provided on the frame plate for driving several adjustment shafts to rotate synchronously so that the frame plate moves up and down along the height direction of the base; a connecting shaft is connected between the upper clamping plate and the frame plate; clamping grooves are provided on the bottom wall of the upper clamping plate and the top wall of the lower clamping plate; each clamping groove on the upper clamping plate is combined with the corresponding clamping groove on the lower clamping plate to achieve clamping and positioning of the external material to be processed.

[0008] The advantages of adopting the above technical solution are as follows: The holding module uses two symmetrically arranged clamps that cooperate with the workpiece reference support platform. Each clamp consists of an upper clamping plate and a lower clamping plate. The lower clamping plate is detachably connected to the base, facilitating flexible replacement according to different sheet metal specifications, thus improving the equipment's adaptability and maintenance convenience. The upper clamping plate is connected to the frame plate via a connecting shaft, ensuring the stability and synchronization of the upper clamping plate during lifting and lowering, preventing uneven force on the sheet metal during clamping. The clamping grooves on the bottom wall of the upper clamping plate and the top wall of the lower clamping plate combine to form a clamping space, enabling omnidirectional positioning that conforms to the sheet metal surface, reducing stress concentration during clamping. Furthermore, the arrangement of two symmetrical clamps further enhances clamping stability, preventing the sheet metal from slipping. The material shifts laterally during processing. The aforementioned workpiece reference support platform is positioned between the two clamps to provide additional support for the sheet metal processing area, preventing deformation caused by the sheet metal being suspended in the middle during processing. The adjusting shafts at the four corners of the base are threadedly connected to the adjusting holes of the frame plate. In conjunction with the drive structure on the frame plate, the frame plate can be driven to rise and fall smoothly along the height direction of the base, thereby causing the upper clamping plate to accurately approach or move away from the lower clamping plate, achieving reliable clamping of sheets of different thicknesses. The design of the above overall structure not only ensures the accuracy and stability of sheet metal clamping, but also creates favorable conditions for improving the accuracy of subsequent V-groove processing and stamping processes, effectively reducing processing defects caused by improper clamping, and improving the stability of the process and the consistency of product quality.

[0009] The invention further comprises: the drive structure including two drive motors mounted on the frame plate; a main drive disk is mounted on the output end of each drive motor; a driven drive disk is mounted on the starting end of each of the four adjusting shafts extending out of the frame plate; a drive belt is mounted on each of the two main drive disks; the four driven drive disks are arranged in pairs to form a transmission group; the two transmission groups are arranged one-to-one with the two drive motors; the two driven drive disks in each transmission group are connected to the corresponding main drive disks via corresponding drive belts; and a thrust bearing is connected between the adjusting shaft and the base.

[0010] The advantages of adopting the above technical solution are as follows: The drive structure uses two drive motors in conjunction with a main drive plate, a driven plate, and a drive belt to transmit power. The four adjusting shafts are paired to form a transmission group corresponding to the drive motors, connected by a belt drive. Belt drives offer smooth transmission and shock absorption, reducing impact loads during the drive process and ensuring uniform rotation of the adjusting shafts. Furthermore, the two drive motors work synchronously, driving the four adjusting shafts to rotate synchronously, ensuring balanced force during the lifting and lowering of the support plate. This prevents the support plate from tilting, which could lead to inaccurate contact between the upper and lower clamping plates, thus ensuring uniform clamping of the plate. The adjustment shaft extends from the frame plate to a drive disc, facilitating the installation and tension adjustment of the drive belt and improving the reliability of the transmission structure. The thrust bearing connecting the adjustment shaft and the base effectively withstands the axial load of the adjustment shaft, reducing frictional resistance during rotation, minimizing component wear, and extending equipment lifespan. Simultaneously, it ensures the flexibility and precision of the adjustment shaft's rotation, enabling rapid and accurate frame plate lifting and lowering, guaranteeing rapid switching and precise control of plate clamping, further improving equipment operating efficiency and processing accuracy, and ensuring smooth transitions between processes.

[0011] The present invention further comprises: the top wall surface of the lower clamping plate is a material support plane for supporting the external plate to be processed, and the height of the workpiece reference support platform is set higher than the material support plane.

[0012] The advantages of adopting the above technical solution are: In this technology, the top wall of the lower clamping plate serves as a material support plane, providing basic support for the sheet metal. The height of the workpiece reference support platform is higher than the material support plane, allowing the processing area to fit tightly against the workpiece reference support platform when the sheet metal is placed on the lower clamping plate, forming a multi-point support structure. This avoids the suspended deformation of the sheet metal processing area caused by relying solely on edge support. Especially during V-groove machining, it effectively disperses the machining load, reduces vibration of the sheet metal during tool cutting, and improves the dimensional accuracy and surface quality of V-groove machining. The tight-fitting support relationship ensures the flatness of the sheet metal processing area. The alignment of the V-groove with the subsequent stamping path is precisely ensured to prevent misalignment of the V-groove due to sheet metal bending, providing a reliable guarantee for the directional propagation of cracks. Simultaneously, the workpiece reference support reduces elastic deformation of the sheet metal during clamping, maintaining structural stability in the processed area and creating conditions for uniform cooling. This avoids localized temperature differences caused by uneven support, ensuring consistent material embrittlement. From the perspective of the support structure, this further enhances the stability of the entire process and the quality of the product cross-section, reducing processing errors and product scrap rates caused by support defects.

[0013] The invention further comprises: the groove prefabrication module including a tool processing structure for processing V-grooves on an external material to be processed, and a feed structure for driving the tool processing structure to contact the external material to be processed. The feed structure includes a servo motor, an upper flange, and a lower flange. The servo motor is mounted on a frame plate, and a drive shaft is coaxially connected to the output end of the servo motor. The drive shaft is perpendicular to the base. The upper flange has a first opening for the drive shaft to pass through. A drive plate is provided between the upper flange and the lower flange. The drive plate has a second opening, which is threadedly connected to the drive shaft. Several couplings are fixedly connected between the drive plate and the lower flange. Several positioning shafts are provided on the upper flange. The beginnings of the positioning shafts are connected to the bottom wall of the frame plate, and the ends of the positioning shafts pass through the lower flange. The tool processing structure is mounted on the lower flange.

[0014] The advantages of adopting the above technical solution are as follows: the feed structure of the prefabricated slot module uses a servo motor to drive the transmission shaft. The servo motor has the characteristics of high control precision and rapid response, which can accurately control the speed and rotation angle of the transmission shaft, thereby achieving precise control of the feed amount. The transmission shaft is threadedly connected to the second opening of the transmission disk. The rotational motion of the servo motor is converted into the axial linear motion of the transmission disk through threaded transmission. Threaded transmission has the advantages of high transmission precision and good self-locking performance, which can ensure the accuracy and stability of the feed action and avoid axial movement during the feed process. The upper flange and the lower flange are fixedly connected by a coupling to ensure that the motion of the transmission disk can be synchronously transmitted to the lower flange, driving the tool processing structure to feed smoothly. One end of the positioning shaft on the upper flange is connected to the support plate, and the other end passes through the lower flange, providing guidance for the axial movement of the lower flange and preventing offset or tilting during the lower flange feed, thus ensuring the motion accuracy of the tool machining structure. The tool machining structure is set on the lower flange and feeds synchronously with the lower flange to achieve precise contact with the plate. The design of the overall feed structure not only ensures the accuracy and stability of the tool feed, but also provides a reliable installation and movement foundation for the tool machining structure, ensuring that the depth and position of the V-groove machining are precisely controllable, avoiding groove defects caused by feed deviation, improving the guiding effect of the pre-mark, laying a good foundation for the subsequent low-temperature embrittlement and stamping synergy, and enhancing the machining accuracy and process reliability of the equipment.

[0015] The present invention further comprises: the tool processing structure including an electric spindle, a connector, a connecting seat, and a plurality of cutting tools; the bottom wall of the connecting seat has a plurality of assembly holes; the plurality of cutting tools are arranged one-to-one with the plurality of assembly holes, and the top of each cutting tool is inserted into the corresponding assembly hole; each assembly hole is threaded with a permanent magnet; the permanent magnet is magnetically attracted to the adjacent cutting tool; the top wall of the connector is connected to the output end of the electric spindle; the electric spindle is coaxially connected to the bottom wall of the lower flange; the bottom wall of the connector has an insertion hole; the connecting seat has a pin for inserting into the insertion hole; the outer peripheral wall of the connector has a keyway for communicating with the insertion hole; the keyway has a wedge-shaped fixing key; the pin has a slot for inserting the wedge-shaped fixing key; the wedge-shaped fixing key is inserted into the keyway and the slot.

[0016] The advantages of adopting the above technical solution are as follows: In this technology, the electric spindle provides stable rotational power to the cutting tool. The electric spindle has a stable speed and high output torque, ensuring the stability and efficiency of the cutting process and improving the machining quality of the V-groove. The connector connects to the output end of the electric spindle, and the connector seat achieves quick positioning and installation by mating the pin with the connector head's insertion hole. The keyway on the outer circumferential wall of the connector head mates with the slot on the pin, and a wedge-shaped fixing key is inserted therein, forming a reliable circumferential fixation. This prevents the connector seat from slipping or relative displacement during rotation, ensuring the stability of torque transmission and improving the synchronization and accuracy of the cutting tool's rotation. The assembly hole on the bottom wall of the connector seat connects to the cutting tool insertion hole. The tool is magnetically fixed with a permanent magnet block, which is threaded into the assembly hole. This not only achieves axial positioning of the cutting tool but also facilitates quick tool replacement and disassembly, improving the equipment's adaptability to machining V-grooves of different specifications. The magnetic connection also has a buffering and vibration-absorbing feature, reducing tool vibration during cutting. At the same time, the threaded permanent magnet block allows for easy adjustment of the magnetic attraction force, ensuring reliable tool fixation and avoiding machining defects caused by tool loosening during cutting. The overall structural design ensures the accuracy, stability, and ease of tool installation and disassembly, while also improving the efficiency and quality of cutting processes. This provides a reliable guarantee for the precision machining of V-grooves, thereby improving the quality of the subsequent stamped section.

[0017] The present invention further comprises: the positioning shaft extending out of the lower flange and having a locking screw head; a spring being provided between the locking screw head and the lower flange; the spring being sleeved on the positioning shaft; the beginning of the spring abutting against the bottom wall of the lower flange; and the end of the spring abutting against the bottom wall of the locking screw head.

[0018] The advantages of adopting the above technical solution are as follows: In this technology, the positioning shaft extends through the lower flange and is equipped with a locking screw. The locking screw serves both a limiting function, preventing the positioning shaft from dislodging from the lower flange, and a mounting base for the spring. The spring is sleeved on the positioning shaft, with its starting end abutting against the bottom wall of the lower flange and its ending end abutting against the bottom wall of the locking screw, forming an elastic support structure. When the feed structure drives the lower flange to move axially, the spring can absorb the impact load during the movement, playing a buffering and vibration damping role, reducing the damage to the transmission components and tool machining structure caused by rigid collisions, and extending the service life of the components. At the same time, the elastic feedback force of the spring can make the feed action of the lower flange more stable. To avoid feed impact caused by excessively fast servo motor drive, improve the compliance of the tool when contacting the plate, reduce the impact load in the early stage of tool cutting, protect the tool edge, and improve the surface quality of V-groove machining. At the same time, the preload of the spring can ensure the positional stability of the lower flange during the feeding process, avoid feed lag or swerving caused by transmission backlash, improve the accuracy of feed control, and ensure the consistency of V-groove machining depth. The overall structure, through elastic support and buffering, not only enhances the operational stability and reliability of the feed structure, but also provides a guarantee for improving machining accuracy, reduces the failure rate during equipment operation, and improves the overall performance of the equipment.

[0019] The invention further comprises: a low-temperature cooling module including a cooling box, a base plate, and a cooling medium circulation device; the cooling box is disposed on the base plate, and the cooling box has a hollow cooling chamber that is connected to a cooling port on the bottom wall of the cooling box; a return groove is provided on the base plate, and the return groove and the cooling port are directly opposite each other, forming a cooling processing area; inlets and outlets for external materials to be processed are formed between both ends of the base plate and the bottom wall of the cooling box, and the inlets and outlets are connected to the cooling processing area; two sealing strips are provided opposite each other on the inner peripheral walls of the inlets and outlets, and the two sealing strips are abutting each other; the sealing strips are made of closed-cell foamed polyethylene material; the cooling medium circulation device has an output pipe and a return pipe, the output pipe is connected to the cooling chamber to realize the input of cooling medium, and the return pipe is connected to the return groove.

[0020] The advantages of adopting the above technical solution are as follows: In the above technology, the cooling box of the low-temperature cooling module and the base plate cooperate to form a closed cooling processing area. The cooling chamber of the cooling box is connected to the return groove of the base plate through the cooling port, forming a cooling medium circulation channel. The output pipe of the cooling medium circulation device inputs the cooling medium into the cooling chamber, and the return pipe recovers the cooling medium in the return groove, realizing the recycling of the cooling medium. This reduces the consumption cost of the cooling medium and conforms to the concept of green manufacturing. The plate to be processed enters and exits the cooling processing area through the inlet and outlet between the base plate and the cooling box. The two sealing strips inside the inlet and outlet abut against each other. The sealing strips are made of closed-cell foamed polyethylene material, which has good sealing performance and heat insulation effect, and can effectively reduce the loss of cooling medium. To prevent external heat from entering the cooling processing area and ensure a stable low-temperature atmosphere within the cooling chamber, the enclosed structure of the aforementioned cooling processing area allows for full contact between the cooling medium and the sheet metal, improving cooling efficiency and ensuring rapid cooling of the sheet metal. Simultaneously, the inclusion of a return trough facilitates the centralized recovery of the cooling medium, preventing its accumulation on the bottom plate and improving the smoothness of cooling medium circulation. This overall structural design achieves efficient utilization of the cooling medium and stable maintenance of the cooling atmosphere, ensuring rapid and uniform cooling of the sheet metal, enhancing the material's embrittlement effect, and creating favorable conditions for the directional propagation of cracks and improved cross-sectional quality during subsequent stamping processes. Furthermore, the sealed structure reduces cooling medium waste and environmental impact, improving the equipment's economic efficiency and environmental friendliness.

[0021] The present invention further comprises: two first turbulence-stirring fans symmetrically arranged on the top wall of the cooling box; a first turbulence hole is provided on the cooling box corresponding to the two first turbulence-stirring fans; the first turbulence hole is connected to the cooling chamber; the first turbulence-stirring fans are inclined relative to the bottom plate and the fan blades are oriented towards the center of the cooling chamber; a display controller is provided on the cooling box corresponding to the two first turbulence-stirring fans; the display controller is communicatively connected to the first turbulence-stirring fans; a plurality of temperature sensors for detecting the internal temperature of the cooling box are provided on the cooling box; an integrated temperature display for communicatively connecting to the temperature sensors is provided on the outer wall of the cooling box; the integrated temperature display is communicatively connected to the control cabinet.

[0022] The advantages of adopting the above technical solution are as follows: Two first turbulence-dispersing fans symmetrically arranged on the top wall of the cooling box are connected to the cooling chamber through first turbulence holes. The fan blades are tilted towards the center of the cooling chamber, which can drive the cooling medium in the cooling chamber to form turbulence, breaking the laminar flow state of the cooling medium and ensuring that the cooling medium is evenly distributed in the cooling chamber, avoiding uneven cooling of the plate caused by excessively high local cooling medium temperatures. Furthermore, the temperature sensor on the cooling box can detect the temperature at different locations in the cooling chamber in real time and transmit the temperature data to the integrated temperature display. The integrated temperature display is connected to the control cabinet to achieve real-time feedback and centralized monitoring of temperature data, facilitating real-time operation by the operator. The system monitors the cooling status; simultaneously, the display controller communicates with the first turbulence-stirring fan, enabling it to adjust the fan speed based on data detected by the temperature sensor. This ensures uniform temperature within the cooling chamber, preventing uneven material embrittlement due to temperature differences and guaranteeing consistent stamping section quality. The overall structure design achieves real-time monitoring, feedback, and precise control of the cooling temperature, enhancing the controllability of the cooling process and ensuring uniform embrittlement of the sheet metal. This effectively reduces processing defects caused by improper cooling. Furthermore, the intelligent control method lowers the cost of manual intervention, improves the automation level and operating efficiency of the equipment, and meets the stringent temperature control requirements of high-precision manufacturing.

[0023] The present invention further comprises: a plurality of second turbulence holes are provided on the top wall of the bottom plate along the length of the bottom plate; a second turbulence stirring fan is provided in each of the second turbulence holes; the plurality of second turbulence stirring fans are arranged in pairs and respectively on both sides of the return trough; the plurality of second turbulence holes are connected to the return trough by a return hole; the return hole and the return trough are inclined relative to each other.

[0024] The advantages of adopting the above technical solution are as follows: The several second turbulence holes opened along the length of the top wall of the bottom plate, with second turbulence-stirring fans inside positioned on both sides of the return channel, form a coordinated upper and lower turbulence structure with the first turbulence-stirring fan at the top of the cooling box. This allows the cooling medium to flow simultaneously from both the upper and lower sides of the plate, further improving the uniformity of contact between the cooling medium and the plate surface, accelerating heat transfer efficiency, and ensuring rapid and uniform cooling of the entire plate. Furthermore, the inclined return channel connecting the second turbulence holes and the return channel provides a smooth return channel for the cooling medium and guides its flow direction, allowing it to quickly return to the return channel after sufficient contact with the plate, improving the cooling medium circulation efficiency and avoiding… The design avoids localized temperature increases caused by the stagnation of cooling medium beneath the sheet metal. The second turbulent agitator fan enhances the turbulence of the cooling medium, breaks the thermal boundary layer on the sheet metal surface, reduces thermal resistance, and improves cooling efficiency. This is especially effective for the lower surface of the sheet metal, preventing slow cooling due to poor contact. The overall structural design further improves the utilization efficiency and cooling uniformity of the cooling medium through coordinated upper and lower turbulence and optimized return path, ensuring consistent material embrittlement. This provides a uniform material property basis for the directional propagation of cracks along the V-groove in subsequent stamping processes, effectively reducing defects such as burrs and tears on the cross-section, improving product qualification rate, shortening cooling time, and increasing the overall production efficiency of the equipment. Attached Figure Description

[0025] Figure 1 This is a three-dimensional view of the present invention;

[0026] Figure 2 This is a three-dimensional view of the base and its linkage structure in this invention;

[0027] Figure 3 This is a three-dimensional view of the transmission shaft and its linkage structure in this invention;

[0028] Figure 4 for Figure 3 A sectional view;

[0029] Figure 5 This is a three-dimensional view of the combined state of the upper clamping plate and the lower clamping plate in this invention;

[0030] Figure 6 This is a three-dimensional view of the lower clamping plate in this invention;

[0031] Figure 7 This is a three-dimensional view of the cooling tank and cooling medium circulation device in the present invention in their coordinated state;

[0032] Figure 8 This is a partial perspective three-dimensional view of the cooling box in this invention;

[0033] Figure 9This is a side sectional view of the cooling box in this invention;

[0034] Figure 10 This is a partial perspective view of the base plate in this invention;

[0035] Figure 11 This is a partial perspective view of the connector and its linkage structure in this invention, which is equipped with at least one cutting tool.

[0036] Figure 12 This is a cross-sectional view of the connector and its linkage structure in this invention. Detailed Implementation

[0037] This invention provides a sheet metal stamping device based on low-temperature embrittlement synergistic pre-mark guidance, comprising a base 1 and a frame plate 2 movably mounted on the base 1. Between the base 1 and the frame plate 2 are a holding module for clamping, positioning, and tensioning the sheet metal to be processed in a processing area, and a groove pre-fabrication module for processing V-shaped guide grooves in a pre-defined fracture area of ​​the sheet metal. On one side of the base 1 are a low-temperature cooling module for rapidly cooling the sheet metal processed by the groove pre-fabrication module to reduce its temperature and maintain a low-temperature atmosphere, and a control cabinet 13 for communicating and controlling the holding module, the groove pre-fabrication module, and the low-temperature cooling module respectively. The holding module includes two sets of symmetrically arranged clamps and a workpiece reference disposed between the two clamps. The support platform 11 includes a clamping device consisting of an upper clamping plate 3 and a lower clamping plate 31. The lower clamping plate 31 is detachably connected to the base 1. Adjusting shafts 12 are rotatably mounted at each of the four corners of the base 1. Each adjustment shaft 12 is provided with an adjustment hole 21 corresponding to each adjustment shaft 12. Each adjustment shaft 12 is threadedly connected to its corresponding adjustment hole 21. The frame plate 2 is equipped with a drive structure for synchronously rotating several adjustment shafts 12 to allow the frame plate 2 to move up and down along the height direction of the base 1. A connecting shaft connects the upper clamping plate 3 to the frame plate 2. Clamping grooves 32 are provided on the bottom wall of the upper clamping plate 3 and the top wall of the lower clamping plate 31. Each clamping groove 32 on the upper clamping plate 3 is connected to a corresponding clamping groove 32 on the lower clamping plate 31. The combination of two components enables clamping and positioning of the external material to be processed. The drive structure includes two drive motors 22 mounted on the frame plate 2. A main drive disk 51221 is mounted on the output end of each drive motor 22. Four adjusting shafts 12 have slave drive disks 51121 extending from the frame plate 2 at their starting ends. Each of the two main drive disks 51221 has a drive belt 222. The four slave drive disks 51121 are paired to form a transmission group. Each transmission group corresponds to one of the two drive motors 22. The two slave drive disks 51121 in each transmission group are connected to the corresponding main drive disk 51221 via the corresponding drive belt 222. A thrust bearing connects the adjusting shaft 12 to the base 1. The top wall of the clamping plate 31 serves as a material support plane for supporting the external sheet material to be processed. The workpiece reference support platform 11 is positioned higher than the material support plane. The groove prefabrication module includes a tool processing structure for machining V-grooves on the external sheet material and a feed structure for driving the tool processing structure to contact the external sheet material. The feed structure includes a servo motor 23, an upper flange 4, and a lower flange 5. The servo motor 23 is mounted on the frame plate 2, and a drive shaft 231 is coaxially connected to the output end of the servo motor 23. The drive shaft 231 is perpendicular to the base 1. The upper flange 4 has a first opening 41 for the drive shaft 231 to pass through. A drive disc 51 is positioned between the upper flange 4 and the lower flange 5.The transmission disc 51 has a second opening 511, which is threadedly connected to the transmission shaft 231. Several couplings 512 are fixedly connected between the transmission disc 51 and the lower flange 5. Several positioning shafts 42 are provided on the upper flange 4. The starting ends of each positioning shaft 42 are connected to the bottom wall of the support plate 2, and the ends of each positioning shaft 42 pass through the lower flange 5. The tool processing structure is located on the lower flange 5 and includes an electric spindle 6, a connector 61, a connecting seat 62, and several cutting tools 63. Several assembly holes 621 are provided on the bottom wall of the connecting seat 62. Each cutting tool 63 is correspondingly arranged with one of the assembly holes 621, and each cutting tool 63 has a top... The connector 61 is fitted with corresponding assembly holes 621, each of which is threaded with a permanent magnet 622. The permanent magnet 622 magnetically engages with the adjacent cutting tool 63. The top wall of the connector 61 is connected to the output end of the electric spindle 6. The electric spindle 6 is coaxially connected to the bottom wall of the lower flange 5. The bottom wall of the connector 61 has an insertion hole 611. The connector seat 62 has a pin 623 for fitting into the insertion hole 611. The outer peripheral wall of the connector 61 has a keyway 612 for communicating with the insertion hole 611. A wedge-shaped fixing key 64 is provided in the keyway 612. The pin 623 has a slot 624 for inserting the wedge-shaped fixing key 64 into the keyway 612. The positioning shaft 42 extends out of the lower flange 5 and is provided with a locking screw head 43. A spring 44 is provided between the locking screw head 43 and the lower flange 5. The spring 44 is sleeved on the positioning shaft 42. The beginning end of the spring 44 abuts against the bottom wall of the lower flange 5, and the end end of the spring 44 abuts against the bottom wall of the locking screw head 43. The low-temperature cooling module includes a cooling box 7, a base plate 71, and a cooling medium circulation device 72. The cooling box 7 is disposed on the base plate 71. The cooling box 7 has a hollow cooling chamber 73, and the cooling chamber 73 is connected to a cooling port 731 formed on the bottom wall of the cooling box 7. A return groove 711 is provided on the base plate 71. The return groove 711 is directly opposite the cooling port 731 and returns... The flow channel 711 and cooling port 731 combine to form a cooling processing area. Inlet and outlet 712 for external materials to be processed are formed at both ends of the base plate 71 and the bottom wall of the cooling box 7. The inlet and outlet 712 are connected to the cooling processing area. Two sealing strips 713 are arranged opposite each other on the inner peripheral wall of the inlet and outlet 712, and the two sealing strips 713 are abutting each other. The sealing strips 713 are made of closed-cell foamed polyethylene. The cooling medium circulation device 72 has an output pipe 721 and a return pipe 722. The output pipe 721 is connected to the cooling chamber 73 to input the cooling medium, and the return pipe 722 is connected to the return channel 711. Two first turbulence-stirring fans 8 are symmetrically arranged on the top wall of the cooling box 7.The cooling box 7 has first turbulence holes 81 at the positions of the two first turbulence stirring fans 8. These first turbulence holes 81 are connected to the cooling chamber 73. The first turbulence stirring fans 8 are inclined relative to the base plate 71, with their blades facing the center of the cooling chamber 73. A display controller 82 is provided at the positions of the two first turbulence stirring fans 8 on the cooling box 7. The display controller 82 is communicatively connected to the first turbulence stirring fans 8. The cooling box 7 is equipped with several temperature sensors for detecting the internal temperature. An integrated temperature display 83 is installed on the wall for communication with a temperature sensor. The integrated temperature display 83 is also communicationally connected to the control cabinet 13. A plurality of second turbulence holes 714 are formed along the length of the base plate 71 on its top wall. Each second turbulence hole 714 is equipped with a second turbulence stirring fan 715. The second turbulence stirring fans 715 are arranged in pairs on both sides of the return trough 711. Each of the second turbulence holes 714 communicates with the return trough 711 through a return hole 716, which is inclined relative to the return trough 711.

[0038] Overall operation process of sheet metal stamping equipment guided by low-temperature embrittlement synergistic pre-marking:

[0039] After the equipment is started, the control cabinet coordinates the operation of the holding module, the slot prefabrication module, and the cryogenic cooling module, strictly adhering to the functional design of each structure and proceeding in an orderly manner according to the following steps, ultimately providing high-quality pretreatment for the subsequent stamping process of the sheet metal:

[0040] 1. Equipment Initialization and Sheet Material Feeding: After the equipment is powered on, the control cabinet completes self-checks of each module. The shelf is initially raised, and the lower clamping plate is securely installed on the base through a detachable connection structure. The cooling medium circulation device starts preheating, and the first and second turbulence stirring fans are in standby mode. The sheet material to be processed is conveyed at a uniform speed along the preset path to the feeding end of the equipment and gradually enters between the upper and lower clamping plates of the holding module. The lower surface of the sheet material is in contact with the material support plane of the lower clamping plate and is in close contact with the workpiece reference support platform between the two clamps. With the structural design of the workpiece reference support platform being higher than the material support plane, the flatness of the sheet material processing area is ensured, laying a precise reference for subsequent V-groove processing.

[0041] 2. Precise Sheet Holding and Tensioning: The control cabinet sends a command to start the two drive motors on the frame plate. The main transmission disc at the output end of the drive motor drives the driven discs on the four corner adjustment shafts of the base to rotate via the transmission belt. The four adjustment shafts are paired to form a transmission group corresponding to the drive motors, achieving synchronous rotation. The adjustment shafts are threadedly engaged with the adjustment holes of the frame plate, converting the rotational motion into axial motion. The drive frame plate descends smoothly along the adjustment shaft, and the upper clamping plate moves down synchronously with the frame plate via the connecting shaft until the clamping grooves of the upper clamping plate and the lower clamping plate engage with each other. The clamping and positioning of the sheet material is achieved through the contact action of the clamping grooves and the preset interference fit. At the same time, the workpiece reference support table provides additional support for the sheet material processing area, preventing the sheet material from being suspended and deformed. The thrust bearing between the adjustment shaft and the base reduces rotational friction, ensuring the stability and precision of the frame plate's lifting and lowering, ultimately achieving reliable sheet material holding and tensioning of the processing area.

[0042] 3. V-groove Prefabrication (Feed + Cutting Coordination): After the sheet metal is held in place, the control cabinet sends a processing command to the groove prefabrication module. The servo motor starts and drives the drive shaft to rotate. The drive shaft engages with the second opening thread of the drive disc, converting the rotational motion into the axial linear motion of the drive disc. The drive disc drives the lower flange to move synchronously through the coupling. The positioning shaft on the upper flange provides guidance for the axial movement of the lower flange, preventing offset and tilting. The locking screw head of the positioning shaft at the end of the lower flange acts as a limit and prevents disengagement. The spring sleeved on the positioning shaft abuts against the bottom wall of the lower flange, absorbing impact loads and providing buffering and vibration reduction during the feeding process. Function: When the flange moves the tool processing structure to the preset position, the electric spindle starts to rotate. The connector head is firmly connected to the connector seat through the wedge-shaped fixing key to ensure stable torque transmission. The cutting tool in the assembly hole on the bottom wall of the connector seat is axially positioned and circumferentially fixed by the magnetic attraction of the permanent magnet block to avoid loosening and displacement during the cutting process. After the electric spindle speed stabilizes, the servo motor continuously drives the transmission shaft, which moves the cutting tool closer to the plate and processes the V-shaped guide groove according to the preset trajectory. After processing is completed, the servo motor rotates in reverse to drive the tool processing structure to quickly retract the tool, and the electric spindle maintains its speed and is ready to operate.

[0043] 4. Sheet Release and Low-Temperature Cooling Conveying: After the V-groove processing is completed, the drive motor rotates in reverse. Through the transmission action of the main drive plate, drive belt, and driven drive plate, it drives the adjusting shaft to rotate in reverse. The frame plate drives the upper clamping plate to rise, and the upper and lower clamping plates separate to form a channel for conveying the sheet. The sheet moves quickly towards the low-temperature cooling module under the drive of the conveying mechanism. The sheet enters the cooling processing area composed of the cooling box and the base plate through the inlet and outlet between the base and the cooling box. The closed-cell foamed polyethylene sealing strips in the inlet and outlet abut against each other to achieve sealing and heat insulation to reduce the loss of cooling medium and prevent the transfer of external heat. The cooling medium circulation device delivers the cooling medium to the cooling chamber of the cooling box through the output pipe. The cooling medium flows through the cooling outlet. The cooling medium enters the return trough of the bottom plate, while the first turbulence stirring fan tilts and blows air towards the center of the cooling chamber through the first turbulence hole. The second turbulence stirring fan on the bottom plate turbules air from below the plate through the second turbulence hole. The upper and lower parts work together to break the laminar flow state of the cooling medium, so that the cooling medium evenly covers the surface of the plate. The temperature sensor collects the temperature data in the cooling chamber in real time, transmits it to the integrated temperature display and feeds it back to the control cabinet. The display controller adjusts the speed of the first and second turbulence stirring fans according to the temperature data to ensure that the temperature in the cooling chamber is uniform. The cooled medium flows into the return trough through the return hole and then flows back to the cooling medium circulation device through the return pipe to achieve recycling. The plate cools down quickly and evenly in the cooling processing area to complete the low-temperature embrittlement treatment.

[0044] 5. Pre-treatment Completion and Continuous Batch Processing: After V-groove pre-forming and low-temperature embrittlement pre-treatment, the sheet metal is removed from the outlet of the low-temperature cooling module and immediately conveyed to the subsequent independent stamping process, ensuring precise controlled tearing along the V-groove and improving the cross-sectional quality. At the same time, new sheet metal to be processed is continuously fed into the base through external conveying equipment. The control cabinet repeats the entire process of equipment initialization, sheet metal holding, V-groove pre-forming, and low-temperature cooling, realizing continuous, batch, and high-precision pre-treatment of sheet metal. Each module is centrally controlled by the control cabinet to ensure smooth connection of each action and accurate matching of process parameters.

[0045] In the above technology, the clamping groove has a certain slope θ and 0° < θ < 0.5°. The clamping groove has an interference fit ε. Through the slope and interference fit, the upper clamping plate can convert part of the axial force into a tensile force along the plate to be processed and away from the V-groove processing area during the pressing process, so as to achieve the purpose of tensioning the V-groove processing area of ​​the plate and thereby improving the processing accuracy of the V-groove.

[0046] In the above technology, the height of the workpiece reference support platform is higher than the material support plane, that is, the workpiece reference support platform protrudes from the material support plane by an amount of e, so that the plate to be processed can be tightly fitted with the workpiece reference support platform.

[0047] In the above technology, the wedge-shaped fixing key has a certain slope, and this slope is ,1°< <5°, while the half-angle of the longitudinal section of the cutting tool is ,

[0048]

[0049] ,in This is the tuning factor for the angle parameter, with a value ranging from 0.1 to 1.0. It is recommended... , The fracture toughness (MPa) of the plate to be processed. The tensile strength (MPa) of the sheet material to be processed.

[0050] In the aforementioned technology, when the drive shaft axially feeds the cutting tool via the upper and lower flanges, and the distance between the tip of the cutting tool and the workpiece is s, the electric spindle starts rotating. When its rotational speed reaches... The rear servo motor rapidly feeds the cutting tool to the cutting position of the material to be processed, and the linear velocity of the cutting tool tip...

[0051]

[0052] Then, with an axial feed speed v and a machining depth h, a V-groove is machined, and the machining time is...

[0053]

[0054] Processing depth is

[0055]

[0056] ,in The depth parameter tuning coefficients range from 0.1 to 1.0. The ambient temperature (°C) is generally set at 20~25°C. After processing, the servo motor causes the cutting tool to retract while the electric spindle maintains a speed of n. s Without stopping the machine, the drive motor rotates in reverse to loosen the upper and lower clamping plates, allowing the sheet material to be fed in. The vertical distance between the upper and lower clamping plates is x millimeters. x should be as small as possible while ensuring that the sheet material can be fed in smoothly. Here, x=0.5t is recommended.

[0057] In the aforementioned technology, the control cabinet transmits the average temperature data displayed by five temperature sensors at different locations within the cooling chamber via an integrated temperature display controller. ,

[0058]

[0059] This is used to regulate the flow rate of the cooling medium in the cooling medium circulation device, and at the same time, the dispersion of temperature data at five different locations is compared. ,

[0060]

[0061] Controlling the rotational speed of the two first-stage flow-around stirring fans, so that s 2 The temperature is controlled within 5°C, thus achieving a constant and uniform temperature atmosphere inside the cooling chamber.

[0062] In the above technical solution, the control cabinet is an existing technology product commonly used in the industrial field. Its core function is to act as a centralized control hub, realizing communication and coordinated control with various electronic components of the equipment. Specifically, it establishes a stable communication link with electronic equipment such as the drive motor of the holding module, the servo motor and electric spindle of the slot prefabrication module, the first and second turbulence stirring fans of the cryogenic cooling module, the cooling medium circulation device, temperature sensors, display controllers, and integrated temperature displays. Through preset control programs and real-time signals fed back by various components, it accurately controls the start, stop, and operating parameters of each electronic device (such as motor speed, electric spindle speed, feed speed, fan speed, cooling medium delivery flow rate, etc.), ensuring that the holding, V-slot prefabrication, cryogenic cooling, and other modules are connected and work together in an orderly manner according to the preset process. Since this type of control cabinet for multi-component communication and centralized control of industrial equipment is already very mature in the field of automated production, its communication protocol, control logic and basic structure are all existing technologies known to those skilled in the art. For example, Siemens' PLC control cabinet also has the functions of multi-device communication connection, centralized parameter adjustment and collaborative control, and is widely used in industrial equipment such as machine tools and automated production lines. Therefore, this application will not elaborate on its specific internal structure, circuit layout and detailed operating principle.

[0063] The cooling medium circulation device mentioned above is a widely used existing technology product in the industrial cooling field. Its core function is to realize the storage, directional transportation, recovery, and recycling of the cooling medium. Specifically, it can stably transport the cooling medium to the cooling chamber of the low-temperature cooling module, while recovering the cooling medium that returns after heat exchange. It can also regulate the flow rate of the cooling medium according to the control signal to adapt to the cooling requirements of the plate. This type of cooling medium circulation device is very mature in industrial production, and its basic structure and working principle are well known to those skilled in the art. For example, Wilo's industrial closed-loop cooling circulation device also has the functions of circulating transportation, flow regulation, and recycling of the cooling medium, and is widely used in cooling systems in fields such as machining and automated production lines. Therefore, this application will not elaborate on its specific internal structure, fluid pipeline layout, and detailed operating principle.

[0064] In the above technology, the material to be processed is identified as 9 in the accompanying drawings of the specification.

[0065] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance, characterized in that: The device includes a base and a frame plate movably mounted on the base. Between the base and the frame plate are a holding module for clamping, positioning, and tensioning the external material to be processed in a processing area, and a groove prefabrication module for processing V-shaped guide grooves in the pre-set fracture area of ​​the external material to be processed. On one side of the base are a low-temperature cooling module for rapidly cooling the material processed by the groove prefabrication module to reduce the material temperature and maintain a low-temperature atmosphere, and a control cabinet for communicating and controlling the holding module, the groove prefabrication module, and the low-temperature cooling module respectively. The holding module includes two sets of symmetrically arranged clamps and a workpiece reference support platform disposed between the two clamps. The clamps consist of an upper clamping plate and a lower clamping plate. The top wall of the lower clamping plate is a material support plane for supporting the external material to be processed. The height of the workpiece reference support platform is higher than the material support plane.

2. The sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance according to claim 1, characterized in that: The lower clamping plate is detachably connected to the base. Adjustment shafts are rotatably provided at the four corners of the base. The frame plate is provided with adjustment holes corresponding to each adjustment shaft position. Each adjustment shaft is threadedly connected to its corresponding adjustment hole. The frame plate is provided with a drive structure for driving several adjustment shafts to rotate synchronously so that the frame plate moves up and down along the height direction of the base. A connecting shaft connects the upper clamping plate to the frame plate. Clamping grooves are provided on the bottom wall of the upper clamping plate and the top wall of the lower clamping plate. Each clamping groove on the upper clamping plate is combined with the clamping groove on the corresponding lower clamping plate to achieve clamping and positioning of the external material to be processed.

3. The sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance as described in claim 2, characterized in that: The drive structure includes two drive motors mounted on a frame plate. A main drive disc is mounted on the output end of each drive motor. A slave drive disc is mounted on the starting end of each of the four adjustment shafts extending out of the frame plate. A drive belt is mounted on each of the two main drive discs. The four slave drive discs are paired up to form a transmission group. The two transmission groups are configured one-to-one with the two drive motors. The two slave drive discs in each transmission group are connected to the corresponding main drive discs via corresponding drive belts. A thrust bearing is connected between the adjustment shaft and the base.

4. The sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance as described in claim 1, characterized in that: The groove prefabrication module includes a tool processing structure for machining V-grooves on an external material to be processed, and a feed structure for driving the tool processing structure to contact the external material to be processed. The feed structure includes a servo motor, an upper flange, and a lower flange. The servo motor is mounted on a frame plate, and a drive shaft is coaxially connected to the output end of the servo motor. The drive shaft is perpendicular to the base. The upper flange has a first opening for the drive shaft to pass through. A drive plate is provided between the upper flange and the lower flange. The drive plate has a second opening, which is threaded to the drive shaft. Several couplings are fixedly connected between the drive plate and the lower flange. Several positioning shafts are provided on the upper flange. The beginnings of the positioning shafts are connected to the bottom wall of the frame plate, and the ends of the positioning shafts pass through the lower flange. The tool processing structure is mounted on the lower flange.

5. A sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance as described in claim 4, characterized in that: The tool processing structure includes an electric spindle, a connector, a connecting seat, and several cutting tools. The bottom wall of the connecting seat has several assembly holes. Each cutting tool is correspondingly positioned with one of the assembly holes, and the top of each cutting tool is inserted into the corresponding assembly hole. A permanent magnet is threaded into each assembly hole, and the permanent magnet magnetically engages with the adjacent cutting tool. The top wall of the connector is connected to the output end of the electric spindle. The electric spindle is coaxially connected to the bottom wall of the lower flange. The bottom wall of the connector has an insertion hole. The connecting seat has a pin for insertion into the insertion hole. The outer peripheral wall of the connector has a keyway for communication with the insertion hole. A wedge-shaped fixing key is provided in the keyway. The pin has a slot for inserting the wedge-shaped fixing key. The wedge-shaped fixing key is inserted into the keyway and slot.

6. A sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance as described in claim 4, characterized in that: The positioning shaft extends out of the lower flange and is provided with a locking screw head. A spring is provided between the locking screw head and the lower flange. The spring is sleeved on the positioning shaft. The beginning end of the spring is in abutting and cooperating with the bottom wall of the lower flange, and the end end of the spring is in abutting and cooperating with the bottom wall of the locking screw head.

7. A sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance as described in claim 1, characterized in that: The low-temperature cooling module includes a cooling box, a base plate, and a cooling medium circulation device. The cooling box is mounted on the base plate and has a hollow cooling chamber that connects to a cooling outlet on the bottom wall of the cooling box. A return channel is formed on the base plate, which is directly opposite the cooling outlet, and the combination of the return channel and the cooling outlet forms a cooling processing area. Inlet and outlet ports for external materials to be processed are formed between both ends of the base plate and the bottom wall of the cooling box. The inlet and outlet ports are connected to the cooling processing area. Two sealing strips are arranged opposite each other on the inner peripheral walls of the inlet and outlet ports, and the two sealing strips are abutting each other. The sealing strips are made of closed-cell foamed polyethylene. The cooling medium circulation device has an output pipe and a return pipe. The output pipe is connected to the cooling chamber to input the cooling medium, and the return pipe is connected to the return channel.

8. A sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance as described in claim 7, characterized in that: Two first turbulence-stirring fans are symmetrically arranged on the top wall of the cooling box. A first turbulence hole is provided on the cooling box corresponding to each of the two first turbulence-stirring fans, and the first turbulence-stirring fans are connected to the cooling chamber. The first turbulence-stirring fans are inclined relative to the bottom plate, and their blades face the center of the cooling chamber. A display controller is provided on the cooling box corresponding to each of the two first turbulence-stirring fans, and the display controller is communicatively connected to the first turbulence-stirring fans. Several temperature sensors are provided on the cooling box for detecting the internal temperature. An integrated temperature display is provided on the outer wall of the cooling box for communicating with the temperature sensors, and the integrated temperature display is communicatively connected to the control cabinet.

9. A sheet metal stamping equipment based on low-temperature embrittlement synergistic pre-mark guidance as described in claim 7, characterized in that: The bottom plate has a plurality of second turbulence holes along its length on the top wall. Each second turbulence hole is provided with a second turbulence stirring fan. The plurality of second turbulence stirring fans are arranged in pairs and on both sides of the return trough. The plurality of second turbulence holes are connected to the return trough by return holes. The return holes are inclined relative to the return trough.

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