Punching die for hardware sheet

Abstract

The utility model discloses a hardware sheet punching die which comprises a fixed die assembly and a movable die assembly, the fixed die assembly comprises a fixed die base and a fixed die plate, and the movable die assembly comprises a movable die base, a movable die plate and a pre-pressing plate. A positioning groove is formed in one side of the fixed mold plate, a concave mold hole is formed in the other side of the fixed mold plate, an ejection spring is arranged in the concave mold hole in a penetrating mode, one end of the ejection spring is connected with the fixed mold base, and the other end of the ejection spring is connected with an ejection block; a punching head is arranged on one side of the movable die plate, a punching receding hole is formed in the pre-pressing plate, the punching head penetrates through the punching receding hole, an electromagnet is arranged in the pre-pressing plate, the projection of the electromagnet is located in the positioning groove, and an elastic mechanism is connected between the movable die plate and the pre-pressing plate. The hardware sheet punching device can effectively prevent hardware sheets from deviating or tilting in the punching process, and is stable and reliable in punching action, good in punching effect, high in stripping efficiency, good in safety performance and stable and reliable in stripping action.

Description

Technical Field

[0001] The utility model relates to the technical field of sheet punching, in particular to a punching die for hardware sheets. Background Art

[0002] Metal stamping is an important metal processing method, which mainly uses punches and molds to deform or fracture hardware materials such as iron, aluminum, and copper. Punching is a fracture processing method of stamping and is generally used for sheet materials.

[0003] Punching is a common and important process for metal sheets. In related technologies, punching of metal sheets generally adopts a simple mold structure, and the mold is driven by a punch press to close the mold to achieve punching processing. This mold mainly includes a punch and a die for achieving punching fracture. During the punching process, the metal sheet is prone to jumping, which affects the stamping accuracy. In addition, the metal sheet is prone to offset during the punching process, and the punching accuracy is insufficient. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a punching die for metal sheets, which can effectively improve the stability of the position of the metal sheets during the punching process, has high punching accuracy, and high production efficiency.

[0005] According to an embodiment of the present invention, a punching die for metal sheets includes a fixed die assembly and a movable die assembly, wherein the fixed die assembly includes a fixed die base and a fixed die plate connected in sequence, and the movable die assembly includes a movable die base, a movable die plate and a pre-pressing plate connected in sequence, wherein the fixed die plate is opposite to the pre-pressing plate;

[0006] A positioning groove for placing metal sheets is provided on one side of the fixed platen close to the pre-pressing plate, and a die hole connected to the bottom of the positioning groove is provided on the other side of the fixed platen. A ejector spring is passed through the die hole, one end of the ejector spring is connected to the fixed die seat, and the other end of the ejector spring is connected to the ejector block. The ejector spring is used to make the ejector block form a movement trend away from the fixed die seat. The original length of the ejector spring is L, the depth of the die hole is H, the depth of the positioning groove is h, and the thickness of the ejector block is D, H≤(L+D)≤(H+h);

[0007] A punching head matching the die hole is provided on the side of the movable template close to the fixed template, and a punching hole matching the punching head is provided on the pre-pressing plate. The punching head is passed through the punching hole. An electromagnet is provided in the pre-pressing plate, and the projection of the electromagnet is located in the positioning groove. An elastic mechanism is connected between the movable template and the pre-pressing plate, and the elastic mechanism is used to make the pre-pressing plate form a movement trend away from the movable template.

[0008] In this embodiment, the fixed die seat is provided with a ejection guide hole connected to the die hole, and the side of the ejector block away from the pre-pressing plate is provided with an ejector pin passing through the ejection guide hole, the ejector spring is sleeved outside the ejector pin, and the other end of the ejector pin is provided with an ejection limit block located outside the fixed die seat.

[0009] In this embodiment, the fixed mold assembly also includes a fixed plate connected to the side of the fixed mold base away from the fixed mold plate. A top material limiting groove is provided on the side of the fixed plate close to the fixed mold base, and the top material limiting block is slidably connected to the top material limiting groove.

[0010] In this embodiment, the elastic mechanism includes a prestress guide pin, a prestress spring and a prestress limit block. The movable template is provided with a prestress guide hole matching the prestress guide pin. A prestress limit groove is provided on the side of the movable mold base close to the movable template. The prestress guide pin is passed through the prestress guide hole. The two ends of the prestress guide pin are respectively connected to the prestress plate and the prestress limit block. The prestress limit block is slidably connected to the prestress limit groove. The prestress spring is sleeved on the outside of the prestress guide pin. The two ends of the prestress spring are respectively connected to the prestress plate and the movable template.

[0011] In this embodiment, a positioning column is provided in the positioning groove, and the height of the positioning column is less than or equal to the thickness of the positioning groove.

[0012] In this embodiment, an inner guide post is provided on one side of the movable template close to the pre-pressing plate, and the pre-pressing plate is provided with an upper guide hole matching the inner guide post, and the inner guide post is passed through the upper guide hole.

[0013] In this embodiment, the fixed template is provided with a lower guide hole matching the inner guide column.

[0014] In this embodiment, a guide sleeve is provided on the side of the movable mold base close to the fixed mold base, and an outer guide pin matching the guide sleeve is provided on the side of the fixed mold base close to the movable mold base, and the outer guide pin is inserted into the guide sleeve.

[0015] The embodiments of the present invention have at least the following beneficial effects:

[0016] The pre-pressing plate can press and position the metal sheet before punching, and the positioning groove can stably limit the position of the metal sheet, which can effectively prevent the metal sheet from deflecting or tilting during the punching process, thereby effectively improving the accuracy of the punching process, and the punching process is stable and reliable, with good punching effect. By arranging a top block connected to a material ejecting spring in the die hole, the top block can be lowered synchronously during the process of the punching head dropping, which can effectively reduce the vibration force on the metal sheet during the punching process, and can significantly reduce the jumping of the metal sheet during punching, which can further improve the stability of the punching process. In addition, the electromagnet in the pre-pressing plate can be powered on after the mold is closed and punched to adsorb and fix the metal sheet. The metal sheet can rise synchronously with the pre-pressing plate when the mold is opened to make the metal sheet out of the positioning groove, which can effectively improve the efficiency of the punching process. After the electromagnet is powered off, the metal sheet can be released to achieve falling and stripping. The stripping efficiency is high, which can effectively reduce manual operation, have high production efficiency and good safety performance. After the mold is opened, the ejector can be raised to the top of the positioning groove by the ejection spring, which can not only effectively eject the punching waste from the die hole, but also prevent the falling metal sheet from completely sinking into the positioning groove. The stripping action is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic structural diagram of the punching die for the metal sheet according to an embodiment of the present utility model when the die is opened;

[0019] Figure 2 This is a schematic structural diagram of the punching die for the metal sheet according to an embodiment of the present utility model during die closing and pre-pressing;

[0020] Figure 3 This is a schematic structural diagram of the punching die for metal sheets according to an embodiment of the present utility model when the die is closed and punching;

[0021] Figure 4 This is a schematic structural diagram of the punching die for metal sheets according to an embodiment of the present utility model when in use.

[0022] Reference numerals:

[0023] Fixed die assembly 100, fixed die base 110, ejection guide hole 111, outer guide pillar 112, fixed die plate 120, positioning groove 121, die hole 122, positioning pillar 123, lower guide hole 124, ejection spring 130, ejector block 140, ejector pin 150, ejection limit block 160, fixed plate 170, ejection limit groove 171;

[0024] Movable mold assembly 200, movable mold base 210, pre-stress limit groove 211, guide sleeve 212, movable mold plate 220, punching head 221, pre-stress guide hole 222, inner guide pin 223, pre-stress plate 230, punching clearance hole 231, electromagnet 232, upper guide hole 233, elastic mechanism 240, pre-stress guide pin 241, pre-stress spring 242, pre-stress limit block 243. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0027] In the description of this utility model, if there is a description of a wire sleeve or a bracket, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Metal stamping is an important metal processing method, which mainly uses punches and molds to deform or fracture hardware materials such as iron, aluminum, and copper. Punching is a fracture processing method of stamping and is generally used for sheet materials. Punching is a common and important process link for hardware sheets. In related technologies, punching of hardware sheets generally adopts a simple mold structure, and the mold is driven by the punch press to close the mold to achieve punching processing. This mold mainly includes a punch and a die for achieving punching fracture. During the punching process, the hardware sheet is prone to jumping, which affects the stamping accuracy. In addition, the hardware sheet is prone to offset during the punching process, and the punching accuracy is insufficient, which seriously affects the quality of the product and production efficiency.

[0030] To address these issues, a number of improved sheet metal punching devices have emerged on the market. These devices improve the precision and efficiency of punching operations by adding positioning mechanisms, optimizing die structures, and introducing automated control systems. However, these devices are often complex and costly, and in practical applications, they still face technical bottlenecks such as rapid die wear and unstable material positioning. Therefore, developing a sheet metal punching device with a simple structure, easy operation, accurate positioning, and high punching efficiency is particularly important.

[0031] The following is the attached Figure 1 To the attached Figure 4 , describing the punching die for the hardware sheet of the embodiment of the utility model, which can effectively improve the stability of the position of the hardware sheet during the punching process, has high punching accuracy and high production efficiency.

[0032] Reference Figures 1 to 4 The embodiment of the utility model is a punching die for metal sheets, characterized in that it includes a fixed die assembly 100 and a movable die assembly 200, the fixed die assembly 100 includes a fixed die base 110 and a fixed die plate 120 connected in sequence, the movable die assembly 200 includes a movable die base 210, a movable die plate 220 and a pre-pressing plate 230 connected in sequence, the fixed die plate 120 is parallel to and opposite to the pre-pressing plate 230, that is, the fixed die base 110, the fixed die plate 120, the pre-pressing plate 230, the movable die plate 220 and the movable die base 210 are arranged in sequence;

[0033] A positioning groove 121 for placing a metal sheet is provided on one side of the fixed template 120 close to the pre-pressing plate 230, and a die hole 122 connected to the bottom of the positioning groove 121 is provided on the other side of the fixed template 120. The die hole 122 is communicated with the bottom of the positioning groove 121, and a ejection spring 130 is passed through the die hole 122. One end of the ejection spring 130 is connected to the fixed die seat 110, and the other end of the ejection spring 130 is connected to a ejection block 140 slidably connected to the die hole 122. The ejection spring 130 is used to make the ejection block 140 form a movement trend away from the fixed die seat 110, so that the ejection block 140 protrudes from the bottom of the positioning groove 121 without being subjected to other external forces. The original length of the ejecting spring 130 is L, which is the length spanned by the ejecting spring 130 when not subject to other external forces. The depth of the die hole 122 is H, the depth of the positioning groove 121 is h, and the thickness of the ejecting block 140 is D. H≤(L+D)≤(H+h), that is, when not subject to other external forces, the top surface of the ejecting block 140 is located above the bottom of the positioning groove 121, and the top surface of the ejecting block 140 is located below the top surface of the fixed plate 120. This not only effectively prevents the metal sheet from completely sinking into the positioning groove 121 when the mold is opened and the material is removed, but also effectively aligns the edges of the positioning groove 121 when the metal sheet is installed before the mold is closed to improve the accuracy of positioning.

[0034] The movable plate 220 is provided with a punching head 221 matching the die hole 122 on one side thereof close to the fixed plate 120. The pre-pressing plate 230 is provided with a punching hole 231 matching the punching head 221. The punching head 221 is slidably connected to the punching hole 231. The pre-pressing plate 230 is provided with an electromagnet 232. The electromagnet 232 is used to be powered on after the die is closed and punched, thereby adsorbing and fixing the metal sheet, and to be powered off and release the metal sheet when the die is opened after punching. The electromagnet 232 is mainly used to realize the positioning of the metal sheet with magnetism. The projection of 32 on the fixed template 120 is located in the positioning groove 121 to ensure the magnetic positioning effect of the electromagnet 232 on the hardware sheet. An elastic mechanism 240 is connected between the movable template 220 and the pre-pressing plate 230. The elastic mechanism 240 is used to make the pre-pressing plate 230 form a movement trend away from the movable template 220, so that the pre-pressing plate 230 protrudes from the side of the punching head 221 close to the fixed template 120 without being subject to other external forces, that is, without being subject to other external forces, the bottom end of the punching head 221 is received in the punching clearance hole 231.

[0035] When in use, the fixed die holder 110 is connected to the fixed machine platform of the punching machine, and the movable die holder 210 is connected to the punching drive head of the punching machine. The hardware sheet is placed in the positioning groove 121 to achieve reliable positioning. The structure after the hardware sheet is installed and placed is as shown in FIG. Figure 4 As shown; Punching die open state structure reference Figure 1 As shown, the punching machine drives the movable die holder 210 to move close to the fixed die holder 110 to achieve mold closing. Figure 2 As shown, the pre-pressing plate 230 first contacts the metal sheet. As the movable die holder 210 moves closer to the fixed die holder 110, the pre-pressing plate 230 continuously presses the metal sheet. The top block 140 moves away from the positioning groove 121, and the ejecting spring 130 and the elastic mechanism 240 are both compressed. During this process, the punching head 221 continuously approaches the metal sheet. Figure 3As shown, the punching head 221 cooperates with the die hole 122 to punch the metal sheet. When the punching head 221 reaches the die hole 122, it pushes the ejector block 140 to continuously move away from the positioning groove 121, and the ejector spring 130 and the elastic mechanism 240 are continuously compressed. After the punching is completed, the electromagnet 232 is energized and forms a magnetic adsorption force on the metal sheet. The punching machine drives the movable die base 210 to move away from the fixed die base 110 to realize the mold opening. The metal sheet obtained after the punching follows the pre-pressing plate 230 to rise. , the ejecting spring 130 and the elastic mechanism 240 rebound and reset, and the ejecting block 140 moves away from the fixed die seat 110 to above the bottom of the positioning groove 121; when stripping, the electromagnet 232 is powered off to release the metal sheet, and the metal sheet falls under the action of gravity, and under the action of the ejecting block 140 protruding above the bottom of the positioning groove 121, the metal sheet can be effectively prevented from being completely sunk into the positioning groove 121, which can effectively improve the reliability of the stripping action, the stripping and unloading operation is convenient, and the punching processing efficiency is high.

[0036] The pre-pressing plate 230 is used to press and position the metal sheet before punching, and the positioning groove 121 can stably limit the position of the metal sheet, which can effectively prevent the metal sheet from deflecting or tilting during the punching process, thereby effectively improving the accuracy of the punching process, and the punching process is stable and reliable, with good punching effect. By arranging a top block 140 connected to the ejecting spring 130 in the die hole 122, the top block 140 can be synchronously lowered during the process of the punching head 221 being lowered, which can effectively reduce the vibration force on the metal sheet during the punching process, and can significantly reduce the jumping of the metal sheet during punching, which can further improve the stability of the punching process.

[0037] In addition, the electromagnet 232 in the pre-pressing plate 230 can be powered on after the mold is closed and punched to adsorb and fix the metal sheet. The metal sheet can rise synchronously with the pre-pressing plate 230 when the mold is opened to make the metal sheet disengage from the positioning groove 121, which can effectively improve the efficiency of the punching process. After the electromagnet 232 is powered off, it can release the metal sheet to achieve falling and stripping. The stripping efficiency is high, which can effectively reduce manual operation, has high production efficiency and good safety performance. After the mold is opened, the ejecting block 140 can be driven by the ejecting spring 130 to rise to the top of the positioning groove 121, which can not only effectively eject the punching waste from the die hole 122, but also prevent the falling metal sheet from being completely trapped in the positioning groove 121, thereby effectively improving the reliability of the stripping action.

[0038] It can be understood that the fixed mold base 110 is provided with a ejection guide hole 111 connected to the end of the die hole 122 away from the positioning groove 121, and the ejection block 140 is provided with a ejection pin 150 passing through the ejection guide hole 111 on the side away from the pre-pressing plate 230. The ejection spring 130 is sleeved on the outside of the ejection pin 150, and the other end of the ejection pin 150 is provided with a ejection limit block 160 located outside the side of the fixed mold base 110 away from the fixed template 120. The ejection pin 150 can effectively improve the stability of the lifting and lowering action of the ejection block 140, and can effectively improve the collimation of the telescopic trajectory of the ejection spring 130, and can effectively improve the smoothness of the lifting and lowering action of the ejection block 140.

[0039] It can be understood that the fixed mold assembly 100 also includes a fixed plate 170 connected to the side of the fixed mold base 110 away from the fixed mold plate 120. The fixed plate 170 is provided with a top material limiting groove 171 on the side close to the fixed mold base 110. The top material limiting block 160 is slidably connected to the top material limiting groove 171, which can enable the punching mold to form a regular contour for easy installation and use.

[0040] It can be understood that the elastic mechanism 240 includes a pre-stress guide post 241, a pre-stress spring 242 and a pre-stress limit block 243. The movable plate 220 is provided with a pre-stress guide hole 222 that matches the pre-stress guide post 241. The movable mold base 210 is provided with a pre-stress limit groove 211 that matches the pre-stress limit block 243 on one side close to the movable plate 220. The pre-stress guide post 241 is passed through the pre-stress guide hole 222. The pre-stress guide post 241 can be inserted into the pre-stress guide hole 222. Lifting and sliding, the two ends of the pre-stressing guide column 241 are respectively connected to the pre-stressing plate 230 and the pre-stressing limit block 243, the pre-stressing limit block 243 is slidably connected to the pre-stressing limit groove 211, the pre-stressing spring 242 is sleeved outside the pre-stressing guide column 241, and the two ends of the pre-stressing spring 242 are respectively connected to the pre-stressing plate 230 and the movable template 220, so that the pre-stressing plate 230 forms a movement trend away from the movable mold base 210, and the pre-stressing action of the pre-stressing plate 230 is stable and reliable.

[0041] It can be understood that a positioning column 123 is provided in the positioning groove 121, and the height of the positioning column 123 is less than or equal to the thickness of the positioning groove 121. For hardware sheets with positioning holes, the positioning column 123 can cooperate with the positioning holes to further position the hardware sheets, which can effectively improve the reliability of the punching action.

[0042] It can be understood that an inner guide column 223 is provided on the side of the movable template 220 close to the pre-pressing plate 230, and the pre-pressing plate 230 is provided with an upper guide hole 233 matching the inner guide column 223. The inner guide column 223 is passed through the upper guide hole 233. The relative position between the pre-pressing plate 230 and the upper template can be effectively limited by the inner guide column 223 and the upper guide hole 233, which can effectively improve the accuracy of the punching action.

[0043] It can be understood that the fixed template 120 is provided with a lower guide hole 124 that matches the inner guide column 223. When the mold is closed and punching, the bottom of the inner guide column 223 is passed through the lower guide hole 124, which can effectively improve the accuracy of the mold closing and positioning of the movable template 220, the pre-pressing plate 230 and the fixed template 120, and further improve the punching accuracy.

[0044] It can be understood that a guide sleeve 212 is provided on the side of the movable mold base 210 close to the fixed mold base 110, and an outer guide column 112 matching the guide sleeve 212 is provided on the side of the fixed mold base 110 close to the movable mold base 210. The outer guide column 112 is passed through the guide sleeve 212. The guide sleeve 212 can effectively limit the lifting and lowering trajectory of the outer guide column 112, thereby effectively limiting the relative movement trajectory of the fixed mold base 110 and the movable mold base 210, which can effectively improve the reliability of the impulse processing action.

[0045] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A punching die for metal sheets, characterized in that: The invention comprises a fixed mold assembly (100) and a movable mold assembly (200), wherein the fixed mold assembly (100) comprises a fixed mold base (110) and a fixed mold plate (120) connected in sequence, and the movable mold assembly (200) comprises a movable mold base (210), a movable mold plate (220) and a pre-pressing plate (230) connected in sequence, and the fixed mold plate (120) is opposite to the pre-pressing plate (230); The fixed die plate (120) is provided with a positioning groove (121) for placing metal sheets on one side close to the pre-pressing plate (230), and the other side of the fixed die plate (120) is provided with a die hole (122) connected to the bottom of the positioning groove (121), and a ejection spring (130) is passed through the die hole (122), one end of the ejection spring (130) is connected to the fixed die seat (110), and the other end of the ejection spring (130) is connected to a ejection block (140), and the ejection spring (130) is used to make the ejection block (140) form a movement trend away from the fixed die seat (110), the original length of the ejection spring (130) is L, the depth of the die hole (122) is H, the depth of the positioning groove (121) is h, and the thickness of the ejection block (140) is D, H≤(L+D)≤(H+h); The movable plate (220) is provided with a punching head (221) matching the die hole (122) on one side close to the fixed plate (120); the pre-pressing plate (230) is provided with a punching clearance hole (231) matching the punching head (221); the punching head (221) is passed through the punching clearance hole (231); an electromagnet (232) is provided in the pre-pressing plate (230); the projection of the electromagnet (232) is located in the positioning groove (121); an elastic mechanism (240) is connected between the movable plate (220) and the pre-pressing plate (230); the elastic mechanism (240) is used to make the pre-pressing plate (230) form a movement trend away from the movable plate (220).

2. A punching die for metal sheets according to claim 1, characterized in that: The fixed die seat (110) is provided with a material ejection guide hole (111) connected to the die hole (122); a ejector pin (150) is provided on the side of the ejector block (140) away from the pre-pressing plate (230) and is passed through the material ejection guide hole (111); the ejector spring (130) is sleeved outside the ejector pin (150); and the other end of the ejector pin (150) is provided with a material ejection limit block (160) located outside the fixed die seat (110).

3. A punching die for metal sheets according to claim 2, characterized in that: The fixed die assembly (100) further comprises a fixed plate (170) connected to a side of the fixed die base (110) away from the fixed die plate (120); a material ejection limiting groove (171) is provided on a side of the fixed die base (110) close to the fixed die base (110); and the material ejection limiting block (160) is slidably connected to the material ejection limiting groove (171).

4. The punching die for metal sheets according to claim 1, characterized in that: The elastic mechanism (240) includes a pre-stress guide column (241), a pre-stress spring (242) and a pre-stress limit block (243); the movable plate (220) is provided with a pre-stress guide hole (222) matching the pre-stress guide column (241); the movable die base (210) is provided with a pre-stress limit groove (211) on a side close to the movable plate (220); the pre-stress guide column (241) is passed through the pre-stress guide hole (222); the two ends of the pre-stress guide column (241) are respectively connected to the pre-stress plate (230) and the pre-stress limit block (243); the pre-stress limit block (243) is slidably connected to the pre-stress limit groove (211); the pre-stress spring (242) is sleeved outside the pre-stress guide column (241); the two ends of the pre-stress spring (242) are respectively connected to the pre-stress plate (230) and the movable plate (220).

5. The punching die for metal sheets according to claim 1, characterized in that: A positioning column (123) is provided in the positioning groove (121), and the height of the positioning column (123) is less than or equal to the thickness of the positioning groove (121).

6. The punching die for metal sheets according to claim 1, characterized in that: An inner guide column (223) is provided on one side of the movable plate (220) close to the pre-pressing plate (230), and an upper guide hole (233) matching the inner guide column (223) is provided on the pre-pressing plate (230), and the inner guide column (223) is passed through the upper guide hole (233).

7. The punching die for metal sheets according to claim 6, characterized in that: The fixed template (120) is provided with a lower guide hole (124) matching the inner guide column (223).

8. The punching die for metal sheets according to claim 1, characterized in that: A guide sleeve (212) is provided on one side of the movable mold base (210) close to the fixed mold base (110), and an outer guide post (112) matching the guide sleeve (212) is provided on one side of the fixed mold base (110) close to the movable mold base (210), wherein the outer guide post (112) is inserted into the guide sleeve (212).

Images