An intelligent stamping die for automobile sheet metal

Abstract

The present invention discloses an intelligent stamping die for automobile sheet metal, which belongs to the technical field of stamping dies. An embodiment of the present invention provides an intelligent stamping die for automobile sheet metal, comprising a lower die base, an upper die base, a hydraulic cylinder and an intelligent controller. The diameters of a plurality of heat conductors in the same cooling groove decrease from bottom to top. When the temperature of each heat conductor increases, the portion of the heat conductor located in the cooling groove can expand. By decreasing the diameters of the plurality of heat conductors from bottom to top, the larger the diameter of the heat conductor located at the bottom, the larger the contact area with the coolant is, so as to balance the cooling consumption of the upper heat conductor for the coolant, so that the cooling effects of the coolant on the plurality of heat conductors are close to the same, so that the cooling of the heat expansion body is more uniform, the waiting time for the next stamping operation is accelerated, and the stamping efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent stamping dies, and in particular to an intelligent stamping die for automobile sheet metal. Background Art

[0002] With the development of human society, automobiles play an increasingly important role as the main means of transportation, and the processing and production of automobiles is also particularly important. Among them, the automobile covering parts process is an important part of the automobile manufacturing industry. The relevant automobile sheet metal stamping dies directly affect the quality of the products. Although the existing production process of automobile sheet metal stamping dies is becoming more and more mature, there are still some shortcomings to be improved.

[0003] The automobile sheet metal stamping dies in the prior art have the following problems: the existing automobile sheet metal stamping dies are all equipped with guide rods for guiding operations. Although this structure can improve product quality, the upper mold is prone to high temperature due to long-term movement and friction with the guide rod, shortening the service life of the guide rod and the mold. At the same time, after the sheet metal is repeatedly stamped, the sheet metal will be stuck on the mold, and the surface temperature of the sheet metal is high. It is easy to cause burns if the person takes it directly with hands. It is time-consuming and laborious to take it with tools. After taking it, the temperature of the sheet metal is high after stamping, so it needs to be cooled, which reduces the efficiency of sheet metal stamping. After a sheet metal stamping is completed, the mold has a high temperature. Continuing the next sheet metal stamping is likely to cause the mold to work at a high temperature. The intelligence is low, affecting the service life of the mold, and the high temperature of the mold makes it easy to burn the user after touching it.

[0004] A Chinese invention patent with announcement number CN111558658B in the prior art discloses an automobile sheet metal stamping die, including a workbench and a controller, a lower die seat is arranged above the workbench, a lower die is arranged in the middle position of the lower die seat, and support rods are arranged at the four corners of the lower die seat, guide rods are symmetrically arranged on the left and right sides of the lower die, and an upper die is arranged above the lower die, heat dissipation components are symmetrically arranged on the upper and lower sides of the guide rods, an upper die seat is arranged on the side of the upper die away from the lower die, the upper die seat and the upper die are telescopically connected by a hydraulic cylinder, and the hydraulic cylinder is electrically connected to the controller; the device can push the stamped sheet metal parts out of the lower die, which is convenient for the staff to take, and can effectively cool the sheet metal parts and the lower die, thereby increasing the service life of the lower die and improving the stamping efficiency of the sheet metal parts.

[0005] The above-mentioned device first transfers heat through the heat transfer plate, so that the push plate pushes out the stamped sheet metal, and then cools the heat transfer plate through the coolant to accelerate the contraction of mercury to wait for the next work. However, since the coolant flows from top to bottom and there are multiple heat transfer plates on the same longitudinal axis, this will cause the heat transfer plate closer to the coolant output end to cool down faster, and when the heat transfer plate on the lower side contacts the coolant again, the temperature of the coolant has increased, which ultimately leads to different cooling effects of the coolant on multiple heat transfer plates on the same longitudinal axis, thereby affecting the cooling effect on mercury, making the push plate unable to be reset evenly, and the length of the heat transfer plate is always fixed, which may also cause the heat transfer plate to continue to transfer heat in the mold to the mercury after the stamping is completed, and to a certain extent hinder the coolant from entering the mold, which not only affects the cooling effect on the mold and the stamped sheet metal, but also delays the reduction of the mercury temperature, ultimately affecting the stamping efficiency. Summary of the invention

[0006] The purpose of the present invention is to provide an intelligent stamping die for automobile sheet metal, so as to solve the technical problems that the above-mentioned prior art affects the cooling effect of the die and the stamped sheet metal parts, affects the stamping efficiency, and has low intelligence.

[0007] The present invention provides an intelligent stamping die for automobile sheet metal, comprising a lower die base, an upper die base, a hydraulic cylinder and an intelligent controller, wherein the lower die base and the upper die base are connected by four supporting columns, a lower die is mounted on the lower die base, two guide rods are mounted between the upper die base and the lower die, a cooling fan is mounted in the guide rods, an upper die is slidably mounted on the guide rods, and the upper die is located between the lower die and the upper die base, a hydraulic cylinder is mounted on the upper die base, an output end of the hydraulic cylinder is fixed to the top end of the upper die, and the hydraulic cylinder is electrically connected to the intelligent controller, a stamping groove is provided in the lower die, a sealing plate is embedded in the stamping groove, a push plate is mounted in the sealing plate, and a stamping groove is provided in the lower die. A cooling groove and a connecting groove are also provided. The connecting groove is filled with a heat expansion body. The heat expansion body can move the push plate upward after being heated and expanded. The cooling groove is located on the side of the connecting groove facing the stamping groove. A number of heat conductors are installed in the cooling groove. The heat conductors are cylindrical, and the axis of the heat conductor is perpendicular to the axis of the cooling groove. One end of each heat conductor is in contact with the internal space of the stamping groove, and the other end is in contact with the heat expansion body in the connecting groove. The heat conductor can transfer the heat in the stamping groove to the heat expansion body, and the diameters of the several heat conductors in the same cooling groove decrease from bottom to top. When the temperature of each heat conductor rises, the part of the heat conductor located in the cooling groove can expand.

[0008] Furthermore, a piston plate 1 is sealingly and slidingly connected in the connecting groove, and the heat expansion body is located at the top of the piston plate 1. A return spring is installed at the bottom of the piston plate 1, and the end of the return spring away from the piston plate 1 is connected to the bottom of the connecting groove. The height of the piston plate 1 is not higher than the height of the lowest heat conductor among the plurality of heat conductors. A power bin is also installed in the lower mold, and a piston plate 2 is installed in the power bin. A connecting column is installed on the top of the piston plate 2, and the end of the connecting column away from the piston plate 2 is fixed to the push plate. A pressure spring is installed on the top of the piston plate 2, and the end of the pressure spring away from the piston plate 2 abuts against the inner top wall of the power bin. A connecting pipe is installed at the bottom of the power bin, and the end of the connecting pipe away from the power bin is connected to the bottom of the connecting groove.

[0009] Furthermore, the heat conductor includes a fixed column and a movable column, the movable column is inserted in the fixed column, and the movable column is slidably connected to the fixed column, the fixed column is located on the side of the cooling groove facing the connecting groove, and the fixed column is sealed to the connecting groove, the movable column is located on the side of the cooling groove facing the stamping groove, and the movable column is frustum-shaped, a heat-resistant rubber membrane is sealed between the movable column and the fixed column, and a filling groove is formed between the heat-resistant rubber membrane and the movable column and the fixed column, and paraffin is filled in the filling groove, and the paraffin is solid at room temperature. When the heat conductor is heated, the paraffin gradually melts and expands, driving the heat-resistant rubber membrane to expand together, and the expanded heat-resistant rubber membrane can pull the movable column toward the fixed column.

[0010] Furthermore, each of the heat conductors is also installed with an auxiliary spring, one end of the auxiliary spring is fixed to the movable column, and the other end of the auxiliary spring is fixed to the fixed column. When the heat conductor is heated, the expanded heat-resistant rubber membrane can pull the movable column toward the fixed column and compress the auxiliary spring. When the temperature gradually drops to room temperature, the expansion degree of the paraffin decreases and gradually solidifies. At this time, the elastic force of the auxiliary spring can reset the movable column before the paraffin is completely solidified.

[0011] Furthermore, the filling groove is also filled with metal powder.

[0012] Furthermore, the content of metal powder in the filling grooves of several heat conductors in the same cooling groove increases from bottom to top.

[0013] Furthermore, a cooling box is installed on the top of the lower mold, the cooling box is connected to the cooling groove, and the cooling box can input coolant into the cooling groove. A sealing groove is opened in the lower mold base, and a reflux groove is opened on the lower side of the sealing groove. The reflux groove is connected to the cooling box through a pipeline, and a water pump is also installed on the pipeline. The sealing groove is connected to the bottom of the cooling groove, and a plurality of circulation grooves are also opened in the lower mold, one end of the circulation groove is connected to the stamping groove, and the other end of the circulation groove is connected to the sealing groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] Firstly, the present invention reduces the diameters of the heat conductors from bottom to top in sequence, so that the heat conductors at the bottom have larger diameters and larger contact areas with the coolant, thereby balancing the cooling consumption of the upper heat conductors for the coolant, so that the cooling effects of the coolant on the heat conductors are close to the same, so that the cooling of the thermal expansion body is more uniform, the waiting time for the next stamping operation is shortened, and the stamping efficiency is improved;

[0016] Secondly, when the stamping operation is not carried out, the paraffin is solid at room temperature. At this time, the moving column extends into the stamping groove. As the stamping operation proceeds, the temperature gradually increases, and the heat conductor transfers the heat in the stamping groove to the heat expansion body. At this time, the paraffin melts and expands, and drives the heat-resistant rubber film to expand together, so that the moving column moves toward the fixed column. At this time, the coolant can not only flow more into the stamping groove through the moving connection between the moving column and the lower mold to cool the inside of the stamping groove, but also the retracted moving column can reduce its heat transfer from the stamping groove to the heat expansion body, further speed up the cooling of the heat expansion body, and then speed up the stamping efficiency. The expanded heat-resistant rubber film can also increase its contact area with the coolant, further speed up the cooling of the heat expansion body, so that the device can be put into the next stamping operation faster;

[0017] Thirdly, when the heat conductor is heated, the expanded heat-resistant rubber film of the present invention can pull the movable column toward the fixed column and compress the auxiliary spring. When the temperature gradually drops to room temperature, the expansion degree of the paraffin decreases and gradually solidifies. At this time, the elastic force of the auxiliary spring can reset the movable column before the paraffin is completely solidified. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a three-dimensional structural cross-sectional view of the first working state of the lower mold of the present invention;

[0021] Figure 3 It is a three-dimensional structural cross-sectional view of the second working state of the lower mold of the present invention;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 is a cross-sectional view of the heat conductor of the present invention in a first working state;

[0024] Figure 6 is a cross-sectional view of the heat conductor of the present invention in a second working state;

[0025] Figure 7 It is a cross-sectional view of the heat conductor located in the same cooling groove of the present invention.

[0026] Reference numerals:

[0027] 100, lower die base; 110, upper die base; 111, hydraulic cylinder; 112, support column; 113, guide rod; 114, upper die; 120, lower die; 121, stamping groove; 122, cooling groove; 123, connecting groove; 124, thermal expansion body; 125, piston plate 1; 126, return spring; 130, sealing plate; 140, push plate; 150, power compartment; 151, piston plate 2; 152, connecting column; 153, pressure spring; 160, cooling box; 161, connecting pipe; 162, sealing groove; 163, reflux groove; 164, pipeline; 165, water pump; 166, circulation groove;

[0028] 200, heat conductor; 210, fixed column; 220, movable column; 230, heat-resistant rubber membrane; 240, filling groove; 250, auxiliary spring. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0031] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Combine the following Figures 1 to 7As shown, an embodiment of the present invention provides an intelligent stamping die for automobile sheet metal, comprising a lower die base 100, an upper die base 110, a hydraulic cylinder 111 and an intelligent controller (not shown in the figure), the lower die base 100 and the upper die base 110 are connected by four support columns 112, a lower die 120 is installed on the lower die base 100, two guide rods 113 are installed between the upper die base 110 and the lower die 120, a cooling fan (not shown in the figure) is installed in the guide rods 113, an upper die 114 is slidably installed on the guide rods 113, and the upper die 114 is located between the lower die 120 and the upper die base 110, a hydraulic cylinder 111 is installed on the upper die base 110, the output end of the hydraulic cylinder 111 is fixed to the top end of the upper die 114, and the hydraulic cylinder 111 is electrically connected to the intelligent controller, a stamping groove 121 is opened in the lower die 120, a sealing plate 130 is embedded and installed in the stamping groove 121, and a push plate 140 is installed in the sealing plate 130, The lower mold 120 is also provided with a cooling groove 122 and a connecting groove 123. The connecting groove 123 is filled with a thermal expansion body 124. The thermal expansion body 124 is mercury. After the thermal expansion body 124 is heated and expanded, it can move the push plate 140 upward. The cooling groove 122 is located on the side of the connecting groove 123 facing the stamping groove 121. A plurality of heat conductors 200 are installed in the cooling groove 122. The heat conductors 200 are cylindrical, and the axis of the heat conductors 200 is aligned with the cooling groove 123. 2 is perpendicular to the axis of the stamping groove 121; one end of each heat conductor 200 is in contact with the internal space of the stamping groove 121, and the other end is in contact with the thermal expansion body 124 in the connecting groove 123. The heat conductor 200 can transfer the heat in the stamping groove 121 to the thermal expansion body 124, and the diameters of the heat conductors 200 in the same cooling groove 122 decrease from bottom to top. When the temperature of each heat conductor 200 increases, the part of the heat conductor 200 located in the cooling groove 122 can expand.

[0035] Preferably, a piston plate 125 is sealingly and slidably connected in the connecting groove 123, the heat expansion body 124 is located on the top of the piston plate 125, a return spring 126 is installed at the bottom of the piston plate 125, and one end of the return spring 126 away from the piston plate 125 is connected to the bottom of the connecting groove 123, and the height of the piston plate 125 is not higher than the height of the lowest position heat conductor 200 among the plurality of heat conductors 200. A power chamber 150 is also installed in the lower mold 120, and a piston plate 126 is installed in the power chamber 150. 51. A connecting column 152 is installed on the top of the piston plate 151, and one end of the connecting column 152 away from the piston plate 151 is fixed to the push plate 140. A pressure spring 153 is installed on the top of the piston plate 151, and one end of the pressure spring 153 away from the piston plate 151 abuts against the inner top wall of the power bin 150. A connecting pipe 161 is installed at the bottom of the power bin 150, and an electric control valve (not shown in the figure) is installed on the connecting pipe 161. One end of the connecting pipe 161 away from the power bin 150 is connected to the bottom of the connecting groove 123.

[0036] Preferably, a cooling box 160 is also installed on the top of the lower mold 120, the cooling box 160 is connected to the cooling groove 122, and the cooling box 160 can input coolant into the cooling groove 122, a sealing groove 162 is opened in the lower mold base 100, a reflux groove 163 is opened on the lower side of the sealing groove 162, the reflux groove 163 is connected to the sealing groove 162, the reflux groove 163 is connected to the cooling box 160 through a pipe 164, a water pump 165 is also installed on the pipe 164, the sealing groove 162 is connected to the bottom of the cooling groove 122, and a plurality of circulation grooves 166 are also opened in the lower mold 120, one end of the circulation groove 166 is connected to the stamping groove 121, and the other end of the circulation groove 166 is connected to the sealing groove 162.

[0037] During operation, the staff first places the sheet metal on the lower mold 120, and then the intelligent controller controls the hydraulic cylinder 111 to drive the upper mold 114 to move downward, and cooperates with the lower mold 120 to perform stamping operations on the sheet metal. A large amount of heat will be generated during the stamping operation. At this time, the intelligent controller also controls the cooling fan in the guide rod 113 to work for preliminary heat dissipation. The heat of the stamping groove 121 is transferred to the heat expansion body 124 by the heat conductor. The expansion of the heat expansion body 124 drives the piston plate 125 to move downward and compresses the air on the lower side of the connecting groove 123. After the stamping is completed, the intelligent controller controls the electric control valve to open, and the compressed air in the connecting groove 123 enters the power compartment 150 through the connecting pipe 161, thereby pushing the piston plate 2 151 and the push plate 140 to move upward and compress the pressure spring 153. , the stamped sheet metal parts are pushed out, and the setting of the pressure spring 153 not only facilitates the reset of the piston plate 151 and the push plate 140, but also prevents the gas from suddenly entering the power bin 150, causing the push plate 140 to move up too quickly, and the impact force of the push plate 140 to damage the sheet metal parts that have not been completely cooled down. During the process of pushing the push plate 140 out, the intelligent controller also controls the cooling box 160 to inject coolant into the cooling groove 122. The coolant can quickly cool the sheet metal and the thermal expansion body 124. The coolant after the cooling operation enters the reflux groove 163, and finally returns to the cooling box 160 through the water pump 165 to complete the cycle, and the sheet metal and the thermal expansion body 124 can be cooled faster by the coolant, so as to efficiently perform the stamping operation. This is the prior art and will not be elaborated on.

[0038] By reducing the diameters of the heat conductors 200 from bottom to top, the diameter of the heat conductor 200 located at the bottom is larger, and the contact area with the coolant is larger, so as to balance the cooling consumption of the coolant by the upper heat conductor 200, so that the cooling effect of the coolant on the heat conductors 200 is almost the same, the cooling of the thermal expansion body 124 is more uniform, the waiting time for the next stamping operation is shortened, and the stamping efficiency is improved.

[0039] Preferably, the heat conductor 200 includes a fixed column 210 and a movable column 220, the movable column 220 is inserted into the fixed column 210, and the movable column 220 is slidably connected to the fixed column 210, the fixed column 210 is located on the side of the cooling groove 122 facing the connecting groove 123, and the fixed column 210 is sealed and connected to the connecting groove 123, the movable column 220 is located on the side of the cooling groove 122 facing the stamping groove 121, and the movable column 220 is frustum-shaped, a heat-resistant rubber film 230 is sealed between the movable column 220 and the fixed column 210, and a filling groove 240 is formed between the heat-resistant rubber film 230, the movable column 220 and the fixed column 210, and the filling groove 240 is filled with paraffin, which is solid at room temperature. When the heat conductor 200 is heated, the paraffin gradually melts and expands, driving the heat-resistant rubber film 230 to expand together, and the expanded heat-resistant rubber film 230 can pull the movable column 220 toward the fixed column 210.

[0040] Through the above arrangement, when the stamping operation is not performed, the paraffin is solid at room temperature, and the movable column 220 extends into the stamping groove 121. As the stamping operation proceeds, the temperature gradually increases, and the heat conductor 200 transfers the heat in the stamping groove 121 to the heat expansion body 124. At this time, the paraffin melts and expands, and drives the heat-resistant rubber film 230 to expand together, so that the movable column 220 moves toward the fixed column 210. At this time, the coolant can not only pass more through the movable column 220 and the lower mold, but also The moving connection of 120 flows into the stamping groove 121, cooling the inside of the stamping groove 121, and the retracted moving column 220 can reduce the heat transfer from the stamping groove 121 to the thermal expansion body 124, further accelerating the cooling of the thermal expansion body 124, and thus accelerating the stamping efficiency. The expanded heat-resistant rubber film 230 can also increase its contact area with the coolant, further accelerating the cooling of the thermal expansion body 124, so that the device can be put into the next stamping operation more quickly.

[0041] Preferably, each of the heat conductors 200 is also installed with an auxiliary spring 250, one end of the auxiliary spring 250 is fixed to the movable column 220, and the other end of the auxiliary spring 250 is fixed to the fixed column 210. When the heat conductor 200 is heated, the expanded heat-resistant rubber membrane 230 can pull the movable column 220 toward the fixed column 210 and compress the auxiliary spring 250. When the temperature gradually drops to room temperature, the expansion degree of the paraffin decreases and gradually solidifies. At this time, the elastic force of the auxiliary spring 250 can be used to reset the movable column 220 before the paraffin is completely solidified.

[0042] Preferably, the filling groove 240 is also filled with metal powder. In order to prevent the cooling liquid from cooling the heat conductor 200 too quickly, the auxiliary spring 250 cannot reset the movable column 220 before the paraffin solidifies. The metal powder is mixed in the filling groove 240, which not only speeds up the temperature transfer from the heat conductor 200 to the stamping groove 121 to the thermal expansion body 124 in the early stage of stamping, but also when the cooling operation is performed, the metal powder can retain the temperature so that the auxiliary spring 250 can drive the movable column 220 to reset in time, so as to avoid affecting the next stamping operation.

[0043] Preferably, since the coolant has a better cooling effect on the upper heat conductor 200, the content of metal powder in the filling grooves 240 of several heat conductors 200 in the same cooling groove 122 increases from bottom to top to avoid the situation where the auxiliary spring 250 cannot drive the movable column 220 to reset in time.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent stamping die for automobile sheet metal, comprising a lower die base (100), an upper die base (110), a hydraulic cylinder (111) and an intelligent controller, wherein the lower die base (100) and the upper die base (110) are connected by four support columns (112), a lower die (120) is installed on the lower die base (100), two guide rods (113) are installed between the upper die base (110) and the lower die (120), a cooling fan is installed in the guide rods (113), an upper die (114) is slidably installed on the guide rods (113), and the upper die (114) is located between the lower die (120) and the upper die base (110), a hydraulic cylinder (111) is installed on the upper die base (110), an output end of the hydraulic cylinder (111) is fixed to the top end of the upper die (114), and the hydraulic cylinder (111) is electrically connected to the intelligent controller, characterized in that: The lower mold (120) is provided with a stamping groove (121), a sealing plate (130) is embedded in the stamping groove (121), a push plate (140) is installed in the sealing plate (130), the lower mold (120) is also provided with a cooling groove (122) and a connecting groove (123), the connecting groove (123) is filled with a thermal expansion body (124), the thermal expansion body (124) can move the push plate (140) upward after being heated and expanded, the cooling groove (122) is located on the side of the connecting groove (123) facing the stamping groove (121), and the cooling groove (122) is installed with a plurality of The heat conductor (200) is cylindrical, and the axis of the heat conductor (200) is perpendicular to the axis of the cooling groove (122); one end of each heat conductor (200) is in contact with the internal space of the stamping groove (121), and the other end is in contact with the thermal expansion body (124) in the connecting groove (123); the heat conductor (200) can transfer the heat in the stamping groove (121) to the thermal expansion body (124), and the diameters of the heat conductors (200) in the same cooling groove (122) decrease from bottom to top, and when the temperature of each heat conductor (200) increases The heat conductor (200) is located in the cooling groove (122) and the portion thereof is capable of expanding; the heat conductor (200) comprises a fixed column (210) and a movable column (220); the movable column (220) is inserted into the fixed column (210), and the movable column (220) is slidably connected to the fixed column (210); the fixed column (210) is located on the side of the cooling groove (122) facing the connecting groove (123), and the fixed column (210) is sealedly connected to the connecting groove (123); the movable column (220) is located on the side of the cooling groove (122) facing the stamping groove (121), and the movable column (220) is slidably connected to the fixed column (210); The column (220) is in a frustum shape, and a heat-resistant rubber film (230) is sealed between the movable column (220) and the fixed column (210), and a filling groove (240) is formed between the heat-resistant rubber film (230), the movable column (220) and the fixed column (210), and the filling groove (240) is filled with paraffin wax, which is solid at room temperature. When the heat conductor (200) is heated, the paraffin wax gradually melts and expands, driving the heat-resistant rubber film (230) to expand together, and the expanded heat-resistant rubber film (230) can pull the movable column (220) to move toward the fixed column (210); An auxiliary spring (250) is also installed in each of the heat conductors (200), one end of the auxiliary spring (250) is fixed to the movable column (220), and the other end of the auxiliary spring (250) is fixed to the fixed column (210). When the heat conductor (200) is heated, the expanded heat-resistant rubber membrane (230) can pull the movable column (220) toward the fixed column (210) and compress the auxiliary spring (250). When the temperature gradually drops to room temperature, the expansion degree of the paraffin wax decreases and gradually solidifies. At this time, the elastic force of the auxiliary spring (250) can be used to reset the movable column (220) before the paraffin wax is completely solidified. The filling groove (240) is also filled with metal powder; The content of metal powder in the filling grooves (240) of a plurality of heat conductors (200) in the same cooling groove (122) increases sequentially from bottom to top.

2. The intelligent stamping die for automobile sheet metal according to claim 1, characterized in that: The connecting groove (123) is sealed and slidably connected with a piston plate (125), the heat expansion body (124) is located at the top of the piston plate (125), and a return spring (126) is installed at the bottom of the piston plate (125). The end of the return spring (126) away from the piston plate (125) is connected to the bottom of the connecting groove (123), and the height of the piston plate (125) is not higher than the height of the lowest position heat conductor (200) among the plurality of heat conductors (200). A power chamber (150) is also installed in the lower mold (120), and a heat expansion body (124) is installed in the power chamber (150). A second piston plate (151) is installed, a connecting column (152) is installed on the top of the second piston plate (151), and one end of the connecting column (152) away from the second piston plate (151) is fixed to the push plate (140), a pressure spring (153) is installed on the top of the second piston plate (151), and one end of the pressure spring (153) away from the second piston plate (151) abuts against the inner top wall of the power chamber (150), and a connecting pipe (161) is installed at the bottom of the power chamber (150), and one end of the connecting pipe (161) away from the power chamber (150) is connected to the bottom of the connecting groove (123).

3. The intelligent stamping die for automobile sheet metal according to claim 1, characterized in that: A cooling box (160) is also installed on the top of the lower mold (120). The cooling box (160) is connected to the cooling groove (122), and the cooling box (160) can input cooling liquid into the cooling groove (122). A sealing groove (162) is provided in the lower mold base (100). A reflux groove (163) is provided on the lower side of the sealing groove (162). The reflux groove (163) is connected to the cooling box (160) through a pipeline (164). A water pump (165) is also installed on the pipeline (164). The sealing groove (162) is connected to the bottom of the cooling groove (122). A plurality of circulation grooves (166) are also provided in the lower mold (120). One end of the circulation groove (166) is connected to the stamping groove (121), and the other end of the circulation groove (166) is connected to the sealing groove (162).

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