A punching die

Abstract

This application relates to the field of punching technology, and in particular to a punching die for a profile. A punching die for a profile includes a pressing mechanism, comprising an upper film assembly, a pressing plate disposed on the upper film assembly, and a inserter connected to the upper film assembly via the pressing plate; the upper film assembly has a first through hole; the punching mechanism includes a first cutting blade assembly and a second cutting blade assembly disposed on the upper film assembly and abutting against each other, wherein two first cutting blade assemblies are provided, located at opposite ends of the pressing plate, and two second cutting blade assemblies are provided, located at the other opposite ends of the pressing plate; a base mechanism includes a base assembly, a contour block disposed on the base assembly for placing a shell, a first inserter for punching with the first cutting blade assembly, a second inserter for punching with the second cutting blade assembly, and a first guide post for insertion into the first through hole for guidance.

Description

Technical Field

[0001] This application relates to the field of punching technology, and in particular to a punching die for a profile. Background Technology

[0002] In the production process of protective cases (such as mobile phone cases), the cases need to be punched to adapt to the size of the product and the original components on the product. The case to be processed needs to be placed on a guide block, and then punched by a punching device.

[0003] Currently, the punching process of housings mostly involves multiple punching devices punching different sides of a housing. Due to the different punching precision of each punching device, deviations can easily occur on the sides of the housing during the punching process, resulting in a high defect rate. If these housings are subsequently released to the market for sale, it will also affect the user experience of consumers. Summary of the Invention

[0004] In order to solve or partially solve the problems in the related technologies, this application provides a punching die that can improve the problem of deviation of the side of the housing caused by multiple punching of different sides of the housing, thereby improving the yield of the housing.

[0005] The punching die for a profile provided in this application adopts the following technical solution:

[0006] A punching die includes: a blanking mechanism comprising an upper die assembly, a blanking plate disposed on the upper die assembly, and a cutter holder connected to the upper die assembly via the blanking plate, the upper die assembly having a first through hole; a punching mechanism comprising a first cutter assembly and a second cutter assembly disposed on the upper die assembly and abutting against each other, wherein two first cutter assemblies are provided, respectively located at opposite ends of the blanking plate, and two second cutter assemblies are provided, respectively located at the other opposite ends of the blanking plate; and a base mechanism comprising a base assembly, a contour block disposed on the base assembly for placing a housing, a first insert for punching with the first cutter assembly, a second insert for punching with the second cutter assembly, and a first guide post for insertion into the first through hole for guidance.

[0007] By adopting the above technical solution, and by setting up a pressing mechanism, a punching mechanism, and a base mechanism, the pressing upper die assembly can sequentially drive the pressing plate, the insert holder, the first cutting assembly, and the second cutting assembly to move towards the base mechanism. This allows the first cutting assembly to engage with the first insert to punch and cut the waste material on both sides of the housing, and the second cutting assembly to engage with the second insert to punch and cut the waste material on the other two sides of the housing. This enables the use of a single punching die to complete the punching of all four sides of the housing in one go, avoiding the problem of deviations caused by multiple punchings of different sides of the housing, thus improving the housing yield.

[0008] Optionally, the first cutting component includes a first fixing block disposed on the pressure plate; a first engaging member located on the side of the first fixing block near the insert holder, the end of the first engaging member away from the pressure plate having a first cutting surface and an engaging groove, wherein the first insert has a second cutting surface corresponding to the first cutting surface; a first fixing post, one end of which passes through the first fixing block and connects to the end of the first engaging member near the pressure plate, forming an engaging space for the first insert to be inserted, wherein the first fixing post is fitted with a first elastic member, the first elastic member being located at the end of the first fixing block away from the first engaging member; and a first cutting member, one end of which is fixed to the side of the first engaging member away from the first fixing block, the other end having a first concave surface, the first concave surface abutting and engaging with the insert holder, the edge of the first concave surface away from the pressure plate being a first cutting part for punching the shell.

[0009] By adopting the above technical solution, by setting a first cutting surface on the first engaging member and a second cutting surface corresponding to the first cutting surface on the first insert member, the first insert member can be easily slid into the engaging space to achieve precise punching when the first cutting member is pressing the side of the shell. By setting an engaging groove on the first engaging member and sleeved a first elastic member on the first fixing post, the first cutting member can have a certain amount of rebound after punching, avoiding pressing the side of the shell and causing deformation of the other two sides of the shell, which would lead to punching deviation of the second cutting member. It also ensures that the first engaging member is engaged and fixed to the first insert member so that the second cutting member can continue to punch the other two sides of the shell.

[0010] Optionally, the second cutting component includes: a second fixing block disposed on the pressure plate; a second engaging member located on the side of the second fixing block near the insert holder, the end of the second engaging member away from the pressure plate having a third cut surface, wherein the second insert has a fourth cut surface corresponding to the third cut surface; a second fixing post, one end of which passes through the second fixing block and connects to the end of the second engaging member near the pressure plate, forming an engaging space for the second insert to be inserted, wherein a second elastic member is sleeved on the second fixing post, the second elastic member being located at the end of the second fixing block away from the second engaging member; and a second cutting member, one end of which is fixed to the side of the second engaging member away from the second fixing block, the other end having a second concave surface, the second concave surface abutting and engaging with the insert holder, the edge of the second concave surface away from the pressure plate being a second cutting portion for punching the shell.

[0011] By adopting the above technical solution, by setting a third cutting surface on the second engaging component and a fourth cutting surface on the second inserting component corresponding to the third cutting surface, it is easy for the second inserting component to slide into the engaging space, so as to realize that the second cutting component can accurately punch when pressing the side of the shell. By sleeved a second elastic element on the second fixed post, it is easy for the second cutting component to spring back after punching.

[0012] Optionally, the first cutter assembly further includes a first gasket located between the first fixing block and the pressure plate.

[0013] By adopting the above technical solution, the height of the first fixing block can be adjusted according to the thickness of the shell by setting the first shim, thereby ensuring that the waste material of the shell is completely cut off during the downward movement.

[0014] Optionally, the first cutter assembly further includes a second gasket located between the first cutter and the first engaging member.

[0015] By adopting the above technical solution, and by setting a second shim between the first cutting member and the first engaging member, the distance between the two first cutting members can be adjusted, thereby adjusting the dimensional accuracy of the punched side of the housing according to the size of the housing.

[0016] Optionally, the second cutter assembly further includes a third gasket located between the second fixing block and the pressure plate.

[0017] By adopting the above technical solution, the height of the second fixing block can be adjusted by setting a third shim to ensure the punching of the shell.

[0018] Optionally, the second cutter assembly further includes a fourth gasket located between the second cutter and the second engaging member.

[0019] By adopting the above technical solution, and by setting a fourth shim between the second cutting member and the second engaging member, the distance between the two second cutting members can be adjusted to adjust the dimensional accuracy of the punched shell side.

[0020] Optionally, the base mechanism further includes: positioning posts disposed on the base assembly at both ends of the contour block, and the contour block is provided with a fixing member for fitting the positioning posts.

[0021] By adopting the above technical solution and setting positioning posts, the contour block can be fixed to prevent the contour block from shifting, which would cause the shell to shift and affect the subsequent punching quality.

[0022] Optionally, the upper mold assembly includes: an upper template having a first through hole, a second through hole, and a third through hole; an upper pad located between the upper template and the pressure plate; a second guide post having one end inserted into the second through hole and the other end passing through the upper pad and the pressure plate sequentially to connect to the cutter holder, wherein a third elastic element is sleeved on the end of the second guide post away from the upper pad, and the third elastic element is located in the pressure plate; and a linear bearing having one end inserted into the third through hole and the other end passing through the upper pad and the pressure plate sequentially to connect to the cutter holder.

[0023] By adopting the above technical solution, the upper pad and the third spring on the second guide post, installed between the upper template and the pressure plate, can buffer the excessive downward pressure, allowing the cutter holder to stably press the shell sleeve for punching. The second guide post, passing through the second through hole, can guide the punching process, and when the downward pressure is too high, the second guide post can move upward within the second through hole to avoid damaging the upper template. The linear bearing, passing through the third through hole, can guide the punching process, and when the downward pressure is too high, the linear bearing can move upward within the third through hole to avoid damaging the upper template.

[0024] Optionally, the base assembly includes: a base, with the first guide post disposed on the base; a lower pad fixed on the base, with the contour block, the first inserter and the second inserter fixed on the lower pad at the end away from the base; wherein a limit block is provided between the upper template and the base.

[0025] By adopting the above technical solution, the lower shim on the base can play a certain buffering role in the punching process; by setting a limiting block between the upper template and the base, the downward punching movement of the pressing mechanism and the punching mechanism can be limited to avoid excessive downward pressure of the insert holder and damage to the housing.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By setting up a pressing mechanism, a punching mechanism, and a base mechanism, the pressing upper die assembly can sequentially drive the pressing plate, the insert holder, the first cutting die assembly, and the second cutting die assembly to move towards the base mechanism. This allows the first cutting die assembly to engage with the first insert to punch and cut the waste material on both sides of the housing, and the second cutting die assembly to engage with the second insert to punch and cut the waste material on the other two sides of the housing. This enables the use of a single punching die to complete the punching of all four sides of the housing in one go, avoiding the problem of deviations caused by multiple punchings of different sides of the housing, thus improving the housing yield.

[0028] 2. By providing a first cut surface on the first engaging component and a second cut surface corresponding to the first inserting component, the first inserting component can be easily slid into the engaging space to achieve precise punching when the first cutting component is pressing the side of the housing. By providing an engaging groove on the first engaging component and a first elastic element on the first fixing post, the first cutting component can have a certain amount of rebound after punching, avoiding pressing the side of the housing and causing deformation of the other two sides of the housing, which would lead to punching deviation of the second cutting component. It also ensures that the first engaging component fastens and fixes the first inserting component so that the second cutting component can continue to punch the other two sides of the housing.

[0029] 3. By setting a third cutting surface on the second engaging component and a fourth cutting surface corresponding to the third cutting surface on the second inserting component, the second inserting component can be easily slid into the engaging space, so as to realize that the second cutting component can accurately punch when pressing the side of the shell. By sleeved a second elastic element on the second fixed post, the second cutting component can be easily springed back after punching. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural schematic diagram of a punching die disclosed in an embodiment of this application.

[0031] Figure 2 yes Figure 1 An exploded view of a punching die is shown.

[0032] Figure 3 yes Figure 1 The diagram shows a partial schematic of a punching die.

[0033] Figure 4 yes Figure 1 The image shows a front sectional view of a punching die.

[0034] Figure 5 yes Figure 1 The diagram shows a front view of a punching die.

[0035] Figure 6 yes Figure 1 The diagram shows a partial schematic of a punching die.

[0036] Figure 7 yes Figure 1 The diagram shows a partial schematic of a punching die.

[0037] Figure 8 yes Figure 1 The diagram shows a side view of a punching die.

[0038] Figure 9 yes Figure 1 The diagram shows the state of the first and second cutter assemblies during downward punching.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Pressing mechanism; 11. Upper die assembly; 111. First through hole; 112. Upper template; 1121. Second through hole; 1122. Third through hole; 113. Upper pad; 114. Second guide post; 115. Linear bearing; 116. Limiting block; 12. Pressing plate; 13. Inserting knife seat; 2. Punching mechanism; 21. First cutting knife assembly; 211. First fixing block; 212. First engaging component; 2121. First cutting surface; 2122. Engaging groove; 213. First fixing post; 214. First cutting knife component; 2141. First cutting knife part; 215. First elastic component; 216. First... 217. Second gasket; 22. Second cutter assembly; 221. Second fixing block; 222. Second engaging member; 2221. Third cut surface; 223. Second fixing post; 224. Second cutter member; 2241. Second cutter section; 225. Second elastic member; 226. Third gasket; 227. Fourth gasket; 3. Base mechanism; 31. Base assembly; 311. Base; 312. Lower gasket; 313. Positioning post; 32. Contouring block; 321. Fixing member; 33. First inserting member; 331. Second cut surface; 34. Second inserting member; 341. Fourth cut surface; 35. First guide post. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0042] This application discloses a punching die for a profile. (Refer to...) Figure 1 A punching die includes a pressing mechanism 1, a punching mechanism 2, and a base mechanism 3. The pressing mechanism 1 is used to connect to form a stamping structure. The shell to be cut is placed on the base mechanism 3. The stamping structure reciprocates vertically relative to the base mechanism 3 to achieve the cutting of the edges of each side of the shell.

[0043] The pressing mechanism 1 includes an upper mold assembly 11, a pressing plate 12, and a cutter seat 13. The pressing plate 12 is disposed on the upper mold assembly 11 and is used to move with the downward pressing movement of the upper mold assembly 11. The cutter seat 13 is connected to the upper mold assembly 11 via the pressing plate 12 so as to press the shell sleeve with the downward pressing movement of the upper mold assembly 11.

[0044] The punching mechanism 2 includes a first cutter assembly 21 and a second cutter assembly 22. Two first cutter assemblies 21 are provided, located at opposite left and right ends of the pressure plate 12 (see [link]). Figure 2 (As shown in the diagram), there are two second cutter assemblies 22, located at opposite front and rear ends of the pressure plate 12 (see...). Figure 2 (As shown in the diagram), the two first cutting blade assemblies 21 and the two second cutting blade assemblies 22 surround and abut against each other, forming a punching area corresponding to the edge shape of the shell to be cut. It is worth mentioning that in this embodiment, the corners where the first cutting blade assembly 21 and the second cutting blade assembly 22 abut against each other overlap by 1mm to avoid leaving any remaining cutting edges on the finished shell, i.e., any waste material not being completely removed, which would result in aesthetic defects.

[0045] See Figure 1 and Figure 3 The base mechanism 3 includes a base assembly 31, a contour block 32, a first insert 33, a second insert 34, and a first guide post 35. The base assembly 31 includes a base 311 and a lower pad 312. The lower pad 312 is fixed on the base 311. The first insert 33 and the second insert 34 surround the contour block 32 and are both disposed on the lower pad 312. The lower pad 312 is made of elastic material and can play a certain buffering role when the upper mold assembly 11 is pressed down. The first guide post 35 is disposed on the base 311, and the corresponding upper mold assembly 11 is provided with a first through hole 111 for the first guide post 35 to pass through, so as to guide the upper mold assembly 11 to be pressed down.

[0046] For example, such as Figure 1 As shown, four first guide posts 35 are inserted into four first through holes 111. The pressing mechanism 1 moves up and down along the four first guide posts 35. Of course, the number of first guide posts 35 and first through holes 111 is not limited here. In addition, in order to prevent the upper mold assembly 11 from falling down and damaging the shell, in this embodiment, a limit block 116 is also provided between the first guide posts 35 to limit the upper mold assembly 11 and the base mechanism 3.

[0047] There are two first insert blades 33, which are used to cooperate with the first cutter assembly 21 to cut the left and right sides of the housing (e.g., Figure 1 (as shown in the diagram) punching; there are two second insert blades 34, used to cooperate with the second cutting blade assembly 22 to punch the front and rear sides of the housing (as shown in the diagram); Figure 1 (As shown in the diagram) punching.

[0048] See Figure 1 and Figure 4 The upper mold assembly 11 includes an upper mold plate 112, an upper pad 113, a second guide post 114, and a linear bearing 115. The upper mold plate 112 is provided with a first through hole 111, a second through hole 1121, and a third through hole 1122. The upper pad 113 is located between the upper mold plate 112 and the pressure plate 12. The upper pad 113 is made of a soft material, such as rubber, which can play a buffering role when the downward pressure is too large, so that the cutter holder 13 can stably press the shell for punching.

[0049] The second guide post 114 has one end inserted into the second through hole 1121, and the other end passes through the upper pad 113 and the pressure plate 12 in sequence and is connected to the cutter seat 13. As shown in the figure, when the upper template 112 is pressed down, it can play a guiding role. At the same time, when the pressure is too high, the second guide post 114 can move upward in the second through hole 1121 to avoid damaging the upper template 112. The end of the second guide post 114 away from the upper pad 113 is fitted with a third elastic element, which is located in the pressure plate 12. When the downward pressure is too high, it can play a buffering role together with the upper pad 113. One end of the linear bearing 115 is inserted into the third through hole 1122, and the other end passes through the upper pad 113 and the pressure plate 12 in sequence and is connected to the cutter seat 13. When the upper template 112 is pressed down, it can play a guiding role. At the same time, when the downward pressure is too high, the linear bearing 115 can move upward in the third through hole 1122 to avoid damaging the upper template 112.

[0050] See Figure 1 and Figure 5 The first cutting blade assembly 21 includes a first fixing block 211, a first engaging member 212, a first fixing post 213, and a first cutting blade 214. The first fixing block 211 is disposed on the pressure plate 12 to move up and down with the pressure plate 12. The first engaging member 212 is located on the side of the first fixing block 211 near the blade holder 13, and the end of the first engaging member 212 away from the pressure plate 12 is provided with a first cutting surface 2121 and an engaging groove 2122. The shape of the engaging groove 2122 can be as follows: Figure 4 As shown, a second cutting surface 331 is provided on the first inserting blade 33 corresponding to the first cutting surface 2121, which facilitates the first inserting blade 33 to slide in. While sliding in, the first engaging member 212 moves towards the side of the housing, so that the first cutting blade 214 squeezes the side of the housing to precisely punch and cut the waste material.

[0051] The first fixing post 213 has one end penetrating through the first fixing block 211 and connected to the end of the first engaging member 212 near the pressure plate 12, forming an engaging space for the first inserting blade 33 to be inserted. A first elastic member 215, which can be a spring, is sleeved on the first fixing post 213 and located at the end of the first fixing block 211 away from the first engaging member 212. When the first engaging member 212 engages the first inserting blade 33, the first engaging member 212 moves, causing the first elastic member 215 to compress the first inserting blade 33. The fixing block 211, and the first elastic element 215 deforms at the same time. In conjunction with the engaging groove 2122 on the first engaging element 212, the first cutting element 214 can continue to move down after punching. The first cutting element 214 has a certain amount of rebound to avoid squeezing the side of the shell, causing deformation of the other two sides of the shell, which in turn causes the second cutting assembly 22 to deviate in punching. It also ensures that the first engaging element 212 engages and fixes the first inserting element 33 so that the second cutting assembly 22 can continue to punch the other two sides of the shell.

[0052] See Figure 5 and Figure 6 The first cutting blade 214 has one end fixed to the side of the first engaging member 212 away from the first fixing block 211, and the other end is provided with a first concave surface. The first concave surface abuts against and engages with, i.e. supports, the insert blade seat 13. The edge of the first concave surface away from the pressure plate 12 is the first cutting blade part 2141 for punching the shell sleeve. The first cutting blade part 2141 is used to cut the left and right ends of the shell sleeve A (see...). Figure 7 ).

[0053] See Figure 1 and Figure 8 The second cutting component 22 includes a second fixing block 221, a second engaging component 222, a second fixing post 223, and a second cutting component 224. The second fixing block 221 is disposed on the pressure plate 12. The second engaging component 222 is located on the side of the second fixing block 221 near the inserting knife seat 13. The end of the second engaging component 222 away from the pressure plate 12 is provided with a third cutting surface 2221. The second inserting knife 34 is provided with a fourth cutting surface 341 corresponding to the third cutting surface 2221, which facilitates the second inserting knife 34 to slide in. While sliding in, the second engaging component 222 moves towards the side of the housing, so as to achieve precise punching by the second cutting component 224 when pressing the side of the housing.

[0054] The second fixing post 223 has one end passing through the second fixing block 221 and connected to the end of the second engaging member 222 near the pressure plate 12, forming an engaging space for engaging the second inserting member 34. The second fixing post 223 is fitted with a second elastic member 225, which can be a spring, located at the end of the second fixing block 221 away from the second engaging member 222. When the second engaging member 222 engages the second inserting member 34, the second engaging member 222 moves, causing the second elastic member 225 to press the second fixing block 221. At the same time, the second elastic member 225 deforms, which facilitates the second cutting member 224 to return to its original position after punching by utilizing the rebound force of the second elastic member 225.

[0055] See Figure 6 and Figure 7 The second cutting blade 224 has one end fixed to the side of the second engaging member 222 away from the second fixing block 221, and the other end is provided with a second concave surface. The second concave surface abuts against and engages with, i.e. supports, the insert blade seat 13. The edge of the second concave surface away from the pressure plate 12 is the second cutting blade part 2241 for punching the shell sleeve. The second cutting blade part 2241 is used to cut the front and rear ends of the shell sleeve (see...). Figure 5 Waste materials (in terms of location).

[0056] See Figure 2 and Figure 5 The first cutting assembly 21 also includes a first shim 216 and a second shim 217. The first shim 216 is located between the first fixing block 211 and the pressure plate 12, and the height of the first fixing block 211 can be adjusted according to the thickness of the housing, thereby ensuring that the waste material of the housing is completely cut during the downward movement. The second shim 217 is located between the first cutting blade 214 and the first engaging member 212, and the distance between the two first cutting blades 214 can be adjusted according to the size of the housing, thereby adjusting the cutting of the left and right sides of the housing (see...). Figure 5 (The dimensional accuracy of the orientation).

[0057] See Figure 2 and Figure 8 The second cutting assembly 22 also includes a third shim 226 and a fourth shim 227. The third shim 226 is located between the second fixing block 221 and the pressure plate 12, and the height of the second fixing block 221 can be adjusted according to the thickness of the housing, thereby ensuring that the waste material of the housing is completely cut during the downward movement. The third shim 226 is located between the second cutting blade 224 and the second engaging member 222, and the distance between the two second cutting blades 224 can be adjusted according to the size of the housing, thereby adjusting the cutting of the front and rear sides of the housing (see...). Figure 7 (The dimensional accuracy of the orientation).

[0058] See Figure 3The base mechanism 3 also includes a positioning post 313, which is set on the lower pad 312 and located at both ends of the contour block 32. Correspondingly, a fixing member 321 is provided on the contour block 32 for fitting the positioning post 313, which can fix the contour block 32 to prevent the contour block 32 from shifting, causing the shell to shift and affecting the subsequent punching quality.

[0059] See Figure 9 This refers to the state where the first cutting blade 214 and the second cutting blade 224 punch the waste material at the edge of the shell when they are pressed down. In this embodiment, the pressing heights of the first cutting blade 214 and the second cutting blade 224 are different, so that the two punching processes of the shell can be realized at once. For example, after the waste material at the left and right ends of the shell is punched, the second cutting blade 224 punches the waste material at the front and rear ends of the shell to achieve precise punching of each side of the shell.

[0060] In summary, the punching die disclosed in this application, by setting up a pressing mechanism 1, a punching mechanism 2, and a base mechanism 3, can realize that by pressing down the upper die assembly 11, the pressing plate 12, the insert holder 13, the first cutter assembly 21, and the second cutter assembly 22 are sequentially driven to press down on the base mechanism 3. This allows the first cutter assembly 21 to engage with the first insert 33 to punch and cut the waste material on both sides of the housing, and the second cutter assembly 22 to engage with the second insert 34 to punch and cut the waste material on the other two sides of the housing. This enables the punching of the housing around the perimeter to be completed in one go using a single punching die, avoiding the problem of deviation on the sides of the housing caused by multiple punchings on different sides of the housing, thereby improving the housing yield.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A punching die for a profile, characterized in that, include: The pressing mechanism includes an upper mold assembly, a pressing plate disposed on the upper mold assembly, and a cutter holder connected to the upper mold assembly via the pressing plate. The upper mold assembly is provided with a first through hole. The punching mechanism includes a first cutter assembly and a second cutter assembly that abut against each other on the upper die assembly. The first cutter assembly is provided in two parts, which are located at opposite ends of the pressure plate, and the second cutter assembly is provided in two parts, which are located at the other opposite ends of the pressure plate. The base mechanism includes a base assembly and a contour block disposed on the base assembly for placing the shell, a first insert for punching with the first cutter assembly, a second insert for punching with the second cutter assembly, and a first guide post for insertion into the first through hole for guidance; wherein the corners of the first cutter assembly and the second cutter assembly that abut against each other overlap by 1mm; The first cutter assembly includes: A first fixing block is disposed on the pressure plate; The first engaging component is located on the side of the first fixing block near the inserter seat. The end of the first engaging component away from the pressure plate is provided with a first cut surface and an engaging groove. The first inserter is provided with a second cut surface corresponding to the first cut surface. The first fixing post has one end penetrating through the first fixing block and connected to the end of the first engaging member near the pressure plate, forming an engaging space for the first inserting knife to be inserted. The first fixing post is fitted with a first elastic member, which is located at the end of the first fixing block away from the first engaging member. The first cutting blade has one end fixed to the side of the first engaging member away from the first fixing block, and the other end provided with a first concave surface. The first concave surface abuts against and engages with the insert blade seat. The edge of the first concave surface away from the pressure plate is the first cutting part for punching the shell. When the first engaging member engages the first insert blade, the first engaging member moves, causing the first elastic member to press against the first fixing block. At the same time, the first elastic member deforms. The engaging groove on the first engaging member cooperates with the protrusion on the first insert blade, which facilitates the first cutting blade to continue moving downward after punching. The first cutting blade has a certain degree of rebound to avoid pressing against the side of the shell. The second cutting blade assembly includes: The second fixing block is disposed on the pressure plate; The second locking component is located on the side of the second fixing block near the inserter seat. The end of the second locking component away from the pressure plate is provided with a third cut surface. The second inserter is provided with a fourth cut surface corresponding to the third cut surface. The second fixing post has one end penetrating through the second fixing block and connected to the end of the second engaging member near the pressure plate, forming an engaging space for the second inserting member to be inserted. The second fixing post is fitted with a second elastic member, which is located at the end of the second fixing block away from the second engaging member. The second cutting blade has one end fixed to the side of the second engaging member away from the second fixing block, and the other end is provided with a second concave surface. The second concave surface abuts against and engages with the insert blade seat. The edge of the second concave surface away from the pressure plate is the second cutting part of the punching shell sleeve. The first cutter and the second cutter have different downward pressure heights; The first cutter assembly further includes a first gasket located between the first fixing block and the pressure plate, and a second gasket located between the first cutter and the first engaging member; The second cutter assembly further includes a third gasket located between the second fixing block and the pressure plate, and a fourth gasket located between the second cutter and the second engaging member; The upper mold assembly includes: The upper template is provided with the first through hole, the second through hole and the third through hole; The upper pad is located between the upper template and the pressure plate; The second guide post has one end inserted into the second through hole, and the other end passes through the upper pad and the pressure plate in sequence and is connected to the inserter seat. A third elastic element is sleeved on the end of the second guide post away from the upper pad, and the third elastic element is located in the pressure plate. A linear bearing, one end of which is inserted into the third through hole, and the other end of which passes through the upper pad and the pressure plate in sequence and is connected to the cutter seat.

2. The punching die for a profile according to claim 1, characterized in that, The base mechanism further includes: positioning posts located at both ends of the contour block on the base assembly, and the contour block is provided with a fixing member for fitting the positioning posts.

3. The punching die for a profile according to claim 1, characterized in that, The base assembly includes: A base, wherein the first guide post is disposed on the base; The lower pad is fixed on the base, and the contour block, the first inserter and the second inserter are fixed on the lower pad at the end away from the base. A limit block is provided between the upper template and the base.

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