A punching die set and a punching tool

Abstract

The application discloses a punching die set, which comprises a bottom plate, a punching assembly arranged on the bottom plate, a guide assembly, a first limiting piece and a second limiting piece; the bottom end of the punching assembly is connected with the bottom plate through an elastic piece, and the first limiting piece is used for blocking the top end of the punching assembly to limit the maximum height of the punching assembly in the vertical direction; the guide assembly is used for guiding the feeding direction of an outer water cutting, and pre-cutting the outer water cutting, so that the punching assembly punches the pre-cutting cut of the outer water cutting in the feeding direction; and the second limiting piece is used for blocking the outer water cutting to limit the maximum feeding stroke of the outer water cutting in the feeding direction. Accordingly, the application also discloses a punching tool.

Description

Technical Field

[0001] This invention belongs to the field of mechanical technology, and in particular relates to a punching module and punching fixture. Background Technology

[0002] As is well known, external water-sealing products are the most common sealing components in the automotive manufacturing industry. They not only have a certain aesthetic effect, but also have good sealing performance.

[0003] The existing manufacturing process for external water-cutting products mainly involves punching and cutting semi-finished products to punch out the required angles and notches at the ends of the external water-cutting products. These notches and angles are mainly to meet the needs of assembly buckles, end injection molding, and overall assembly.

[0004] Currently, the punching of external water-cutting ends requires punching two inner lips and two outer lips. Generally, the cutting edge position is first manually cut with a blade, and then the corresponding punching die is inserted for punching. The cutting edge position is difficult to control. After cutting, the position of the matching die is inconsistent, which leads to overcutting and scrapping of external water-cutting products or manual rework. This not only affects production efficiency, but also greatly increases production costs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a new punching module to solve the problem of difficulty in controlling the cutting position of the existing manual blade and the inconsistency in the position of the die after the cutting is completed.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a punching module, which includes a base plate and a punching component, a guide component, a first limiting component and a second limiting component disposed on the base plate;

[0007] The bottom end of the punching assembly is connected to the base plate via an elastic member, and the first limiting member is used to block the top end of the punching assembly to limit the maximum height of the punching assembly in the vertical direction.

[0008] The guiding component is used to guide the feeding direction of the external water cutter and to pre-cut the external water cutter so that the punching component punches the pre-cut kerf of the external water cutter along the feeding direction; the second limiting member is used to block the external water cutter to limit the maximum feeding stroke of the external water cutter in the feeding direction.

[0009] In current technology, the cutting edge is usually manually cut with a blade before being inserted into the corresponding die for punching. Because the cutting is done manually, it is difficult to control the cutting position, and mismatch between the cut and the die's cutting position is likely to occur.

[0010] Therefore, in the above-mentioned technical solution of the present invention, the inventors designed a brand-new punching die. The structure of the punching die was redesigned to include a guide component, which guides the feeding direction of the outer water cutter. When the outer water cutter feeds into the punching die, the guide component can pre-cut the lip of the outer water cutter. Once the outer water cutter is in place and blocked by the second limiting member, the user can control the punching component to punch the pre-cut cut position of the outer water cutter along the feeding direction, thereby ensuring that the punching position of the punching component is consistent with the pre-cut cutting position of the guide component.

[0011] Therefore, the punching die designed by this invention can change the original manual blade cutting to a pre-cutting of the outer water cutter lip when the material is inserted, and punching after the material is in place. This can ensure that the punching position and the cutting position are consistent, and no manual pre-cutting is required. It can greatly improve production efficiency and increase the yield of products.

[0012] Furthermore, in the punching module of the present invention, the guiding component includes a first guiding member and a second guiding member. The first guiding member includes a guiding support block and a guiding block. One end of the guiding support block is connected to the base plate, and the other end of the guiding support block is detachably connected to the guiding block. The height of the guiding block in the vertical direction is higher than that of the second guiding member.

[0013] Furthermore, in the punching module of the present invention, the guide block is provided with at least one roller; the second guide member includes a protrusion extending along the feeding direction, and the top of the protrusion is provided with a pre-cutting blade.

[0014] In the above technical solution of the present invention, the guide component may specifically include a first guide member and a second guide member, and the first guide member specifically includes a guide support block and a guide block. The guide block is provided with rollers to facilitate the external water cutter to feed materials along the feeding direction. Furthermore, since the guide support block is set on the base plate, and the guide block and the guide support block are detachably connected, the position of the guide block on the guide support block can be adjusted. The operator can adjust the position of the guide block according to specific needs, which is beneficial for adapting to different external water cutter products.

[0015] It should be noted that the aforementioned guide block is mainly used to guide the material feeding direction of the external water cutter. Unlike the aforementioned guide block, the aforementioned second guide component is mainly used to guide the material feeding direction of the external water cutter while simultaneously pre-cutting the lip of the external water cutter.

[0016] Therefore, in some preferred embodiments, the second guide member is further provided with a protrusion extending in the feeding direction, and the top of the protrusion is provided with a pre-cutting blade that can cut the lip of the outer water cutter when the outer water cutter is guided from the second guide member and fed in the feeding direction.

[0017] Furthermore, in the punching module of the present invention, the second limiting member includes a limiting support block and a positioning block. One end of the limiting support block is connected to the base plate, and a fixing hole is provided on the other end of the limiting support block.

[0018] The positioning block has a strip-shaped hole, and the positioning block is fixed to the other end of the limiting support block by a bolt. One end of the bolt passes through the strip-shaped hole and is threadedly connected to the fixing hole.

[0019] In the above technical solution of the present invention, considering the size of the punching part, a second limiting member is also provided in the punching module to limit the maximum feeding stroke of the external water cutter.

[0020] In the actual installation of the second limiting component, it is preferable to control the second limiting component to include a limiting support block and a positioning block, and to control the positioning block to have a strip hole, the limiting support block to have a fixing hole, and the positioning block to be fixed to the limiting support block by bolts. The bolts can pass through the strip hole on the positioning block and connect with the fixing hole on the limiting support block.

[0021] In practical applications, based on the application principle of bolts, when the bolt nut is pressed tightly against the positioning block, the positioning block can be firmly locked in position on the aforementioned limiting support block. Since the positioning block has a strip-shaped hole, the position of the positioning block on the limiting support block is adjustable before locking with bolts. By adjusting the position of the positioning block on the limiting support block, the distance between the current positioning block and the aforementioned guide component can be adjusted, thereby adjusting the maximum feeding stroke of the external water cutter in the feeding direction.

[0022] Furthermore, in the punching module of the present invention, the punching component includes a mounting block, a punch insert, a baffle plate, and a punch extension block. The bottom end of the mounting block is connected to the elastic member, and the top end of the mounting block is connected to the punch extension block. The punch insert and the baffle plate are both located on the side of the mounting block near the guide component, and one end of the punch insert is connected to the mounting block, while the other end of the punch insert has a cutting edge extending along the feeding direction.

[0023] In the above technical solution of the present invention, the mounting block, punch insert, baffle plate, and punch extension block can together constitute a punch. Specifically, the elastic element can be a spring, and the baffle plate prevents waste material from falling into the spring and damaging the mold. Notably, one end of the punch insert is connected to the mounting block, and the other end of the punch insert has a cutting edge extending along the feeding direction, so that in practical applications, this cutting edge can be used for external water-cutting.

[0024] Furthermore, in the punching module of the present invention, the first limiting member includes a concave platform and a blocking member. The concave platform is disposed on the base plate, one end of the blocking member is connected to the concave platform, and the other end of the blocking member is used to block the mounting block.

[0025] The concave platform has a concave groove, and the mounting block is slidably disposed in the concave groove.

[0026] Furthermore, the punching module of the present invention also includes a die insert, which is detachably disposed on the die plate. The top end of the die insert is provided with a die protrusion extending along the feeding direction, and the die protrusion is coaxially disposed with the cutting edge of the punch insert.

[0027] In the above-described technical solution of the present invention, the first limiting member may specifically include a concave platform and a blocking member. The concave platform has a concave groove, and the mounting block of the punching assembly can slide in the concave groove to adjust its height in the vertical direction. The blocking member provided on the concave platform can effectively block and limit the maximum height of the mounting block in the vertical direction. In actual installation, it may also specifically include a die insert, which can be detachably provided on the concave platform and can be fixed together with the concave platform on the base plate. The top of the die insert is provided with a die protrusion extending along the feeding direction of the external water-cutting. In some preferred embodiments, the die protrusion, the cutting edge of the punch insert, and the pre-cutting cutting edge on the second guide member all extend along the feeding direction and are coaxially arranged.

[0028] Accordingly, another object of the present invention is to provide a punching fixture that applies the punching module described above, which also has the advantages and beneficial effects of the punching module described above.

[0029] In this invention, the punching fixture includes an upper die holder, a lower die holder, and the punching module described above; the upper die holder and the lower die holder are disposed opposite to each other, the punching module is disposed on the lower die holder, and the punching module is located between the upper die holder and the lower die holder.

[0030] Furthermore, the punching fixture described in this invention also includes an outer guide post, one end of which is connected to the lower die base, and the other end of which passes through the upper die base.

[0031] Furthermore, the punching fixture of the present invention also includes a pressure block, which is disposed on the lower die base, and one end of the pressure block presses the bottom plate of the punching module against the lower die base.

[0032] The beneficial effects of this invention are as follows: This invention optimizes the design of a new punching module. When the outer water-cutting material is guided by the guiding component, the punching module can cut the lip with the cutting edge of the punching component. After the material is fed into place, the lip of the outer water-cutting material can be punched off in one go, so as to ensure that the punching position is consistent with the cutting position, thereby improving the punching accuracy of the product, improving efficiency and yield, effectively reducing the rework rate, and greatly reducing the production cost. It has good promotion prospects and application value.

[0033] Accordingly, the punching fixture designed in this invention adopts the above-mentioned punching module, which also has the above-mentioned advantages and beneficial effects. In addition, in some preferred embodiments, the punching module on the punching fixture can be set on the lower die base in a quick-release manner, that is, the bottom plate of the punching module is pressed against the lower die base by the pressure block. When the punching module is damaged, the user can directly remove the punching module, thereby greatly improving the die repair efficiency. Attached Figure Description

[0034] Figure 1 A schematic diagram of the external water-cutting structure is shown.

[0035] Figure 2 A schematic diagram of the cross-section of the external water shear is shown;

[0036] Figure 3 This is a schematic diagram of the punching module described in one embodiment of the present invention from one perspective.

[0037] Figure 4 This is a schematic diagram of the punching module described in this invention from another perspective in one embodiment.

[0038] Figure 5 This is a schematic diagram of the base plate of the punching module according to one embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the connection between the punch and the elastic element in one embodiment of the punching module of the present invention;

[0040] Figure 7 This is a schematic diagram of the connection and matching structure between the concave platform and the concave die insert in one embodiment of the punching die assembly described in this invention.

[0041] Figure 8 This is a schematic diagram of the structure of the second guide member in one embodiment of the punching module described in this invention.

[0042] Figure 9 This is a schematic diagram of the guide block in one embodiment of the punching module described in this invention.

[0043] Figure 10 This is a schematic diagram of the blocking component in one embodiment of the punching module described in this invention.

[0044] Figure 11 This is a schematic diagram of the punching fixture described in this invention from one perspective in one embodiment.

[0045] Figure 12 This is a front view of the punching fixture described in one embodiment of the present invention.

[0046] Figure 13 This is a side view of the punching fixture described in one embodiment of the present invention.

[0047] Figure 14 This is a schematic diagram of the lower die holder of the punching fixture described in one embodiment of the present invention.

[0048] Label Explanation:

[0049] 1. Punching module;

[0050] 2. Base plate; 21. Through groove;

[0051] 3. Punching assembly; 31. Mounting block; 32. Punch insert; 321. Cutting edge; 33. Material stop plate; 34. Punch extension block;

[0052] 4. Guide assembly; 41. Guide support block; 42. Guide block; 421. Roller; 43. Second guide component; 431. Protrusion;

[0053] 5. First limiting component; 51. Concave platform; 52. Blocking component; 53. Concave mold insert; 531. Concave mold protrusion;

[0054] 6. Second limiting component; 61. Limiting support block; 611. Fixing hole; 62. Positioning block; 621. Strip hole;

[0055] 7. Elastic components;

[0056] 8. External guide post;

[0057] 9. Limiting post;

[0058] 10. Upper mold base;

[0059] 11. Lower mold base; 111. Positioning groove; 112. Scrap material groove;

[0060] 12. Pressing blocks;

[0061] 13. External water cut; 131. First outer lip edge; 132. Second outer lip edge; 133. First inner lip edge; 134. Second inner lip edge. Detailed Implementation

[0062] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0063] In the automotive industry, exterior water deflectors are a very common exterior decorative component. (See also...) Figure 1 and Figure 2 It can be seen that the outer water cutter 13 generally has four lips, namely the first outer lip 131, the second outer lip 132, the first inner lip 133, and the second inner lip 134. When the user actually wants to apply the outer water cutter 13, it is usually necessary to punch the end of the outer water cutter 13 and punch off the lips of the outer water cutter 13.

[0064] Therefore, please refer to Figures 3 to 14 As shown, the present invention designs a new punching module 1 for punching an external water cutter 13. The punching module 1 specifically includes a base plate 2 and a punching component 3, a guide component 4, a first limiting member 5, and a second limiting member 6 disposed on the base plate 2. The bottom end of the punching component 3 is specifically connected to the base plate 2 through an elastic member 7, and the elastic member 7 can be specifically selected as a spring.

[0065] Accordingly, in the above-mentioned punching module 1, the first limiting member 5 is used to block the top of the punching component 3 to limit the maximum height of the punching component 3 in the vertical direction; the above-mentioned guiding component 4 is used to guide the feeding direction of the outer water cutter 13 and pre-cut the outer water cutter 13 so that the punching component 3 punches along the feeding direction against the pre-cut cut position of the outer water cutter 13, thereby ensuring that the punching position is consistent with the cut position; while the above-mentioned second limiting member 6 is used to block and limit the maximum feeding stroke of the outer water cutter 13 in the feeding direction.

[0066] It should be noted that, for reference Figure 3 and Figure 4 As can be seen, in this embodiment, the guide component 4 specifically includes a first guide member and a second guide member 43. The first guide member includes a guide support block 41 and a guide block 42. One end of the guide support block 41 is connected to the base plate 2, and the other end of the guide support block 41 is detachably connected to the guide block 42. The guide block 42 is higher than the second guide member 43 in the vertical direction. Specifically, the guide block 42 is provided with two rollers 421 (e.g., ...). Figure 9 As shown), to facilitate the feeding of materials by the outer water cutter 13 along the feeding direction; at the same time, in this embodiment, the above-mentioned second guide member 43 is fixedly disposed on the first limiting member 5, and the second guide member 42 includes a protrusion 431 extending along the feeding direction of the outer water cutter 13 (as shown). Figure 8 As shown), the top of the protrusion 431 has a pre-cutting kerf.

[0067] In this invention, since the guide support block 41 is mounted on the base plate 2, and the guide block 42 is detachably connected to the guide support block 41, the position of the guide block 42 on the guide support block 41 is adjustable. Operators can adjust the position of the guide block 42 according to specific needs, thus facilitating adaptation to different external water-cutting cutter 13 products. In this invention, the guide block 42 is mainly used to guide the external water-cutting cutter 13 in the feeding direction. Unlike the guide block 42, the second guide member 43 is mainly used to guide the external water-cutting cutter 13 in the feeding direction while simultaneously using its protrusion 431 extending along the feeding direction to pre-cut the lip of the external water-cutting cutter 13.

[0068] Accordingly, in this embodiment, considering the size of the punch, a second limiting member 6 is also provided in the punching module 1 to limit the maximum feeding stroke of the outer water cutter 13.

[0069] It should be pointed out that, such as Figure 4 As shown, when the second limiting member 6 is actually set, the second limiting member 6 designed in this embodiment includes a limiting support block 61 and a positioning block 62. One end of the limiting support block 61 is fixedly connected to the base plate 2, and a fixing hole 611 is opened on the other end of the limiting support block 61. The positioning block 62 is provided with a strip hole 621. The positioning block 62 can be fixed to the other end of the limiting support block 61 by bolts, and one end of the bolt can pass through the strip hole 621 and be threadedly connected to the fixing hole 611 on the limiting support block 61.

[0070] In practical applications, based on the application principle of bolts, when the bolt nut is tightly pressed against the positioning block 62, the positioning block 62 can be firmly locked on the position of the limiting support block 61. Since the positioning block 62 has a strip hole 621, the position of the positioning block 62 on the limiting support block 61 is adjustable before locking with bolts. By adjusting the position of the positioning block 62 on the limiting support block 61, the distance between the current positioning block 62 and the guide component 4 can be adjusted, thereby adjusting the maximum feeding stroke of the outer water cutter 13 in the feeding direction.

[0071] In addition, it should be noted that, such as Figure 4 and Figure 6As shown, in this invention, the designed punching assembly 3 specifically includes: a mounting block 31, a punch insert 32, a baffle plate 33, and a punch extension block 34. The bottom end of the mounting block 31 is connected to an elastic member 7, one end of which is connected to the mounting block 31, and the other end of which is connected to the base plate 2 of the punching module 1. The punch extension block 34 is specifically disposed at the top of the mounting block 31, and both the punch insert 32 and the baffle plate 33 are disposed on the side of the mounting block 31 near the guide assembly 4. Simultaneously, one end of the punch insert 32 is connected to the mounting block 31, and the other end of the punch insert 32 has a cutting edge 321 extending along the feeding direction.

[0072] In addition, it should be pointed out that, such as Figure 7 As shown, in this invention, the first limiting member 5 specifically includes: a concave platform 51 and a blocking member 52. The concave platform 51 is disposed on the base plate 2 of the punching module 1, and one end of the blocking member 52 is connected to the upper surface of the concave platform 51, and the other end of the blocking member 52 is used to block the mounting block 31 of the punching assembly 3; as Figure 4 He Ru Figure 10 As shown, the other end of the blocking member 52 can effectively limit the maximum height of the mounting block 31 in the vertical direction.

[0073] The concave platform 51 is specifically provided with a concave groove, which extends along the vertical height direction, and the mounting block 31 is slidably disposed in the concave groove so that the mounting block 31 can be correspondingly disposed in the concave groove, and the mounting block 31 can move up and down along the vertical height direction.

[0074] Furthermore, referring to reference 7, it can be seen that in this embodiment, the punching module 1 is further provided with a die insert 53. The die insert 53 is detachably connected to the concave platform 51, and the top of the die insert 53 is provided with a die protrusion 531 extending along the feeding direction of the outer water cutter 13. In this embodiment, the die protrusion 531, the cutting edge 321 of the punch insert 32, and the pre-cutting cutting edge on the second guide 43 all extend along the feeding direction of the outer water cutter 13, and the three are coaxially arranged so that after the outer water cutter 13 cuts from the pre-cutting cutting edge on the protrusion 431 of the second guide 43, it can accurately extend along the feeding direction and correspond to the cutting edge 321 of the punch insert 32, thereby ensuring that the subsequent punching position is consistent with the pre-cutting cut position.

[0075] Accordingly, see Figures 11 to 14As can be seen, the punching module 1 designed in this invention can be specifically applied in a punching fixture, and is specifically arranged between the upper die holder 10 and the lower die holder 11, which are arranged opposite to each other. For ease of use, the lower die holder 11 of the punching fixture has four positioning grooves 111 for fixing the punching module 1, and three of these positioning grooves 111 are used to accommodate three of the aforementioned punching modules 1. These three punching modules 1 can be used to punch different lips of the outer water-cutting cutter 13. One punching module 1 can be used to punch the two inner lips of the outer water-cutting cutter 13 (first inner lip 133 and second inner lip 134); and since the two outer lips have significantly different shapes, the other two punching modules 1 can be used to punch the first outer lip 131 and the second outer lip 132 of the outer water-cutting cutter 13, respectively.

[0076] It should be noted that four external guide posts 8 are also provided between the upper die base 10 and the lower die base 11. One end of the external guide post 8 is connected to the lower die base 11, and the other end of the external guide post 8 passes through the upper die base 10, so that the upper die base 10 can move closer to or further away from the punching module 1 provided on the lower die base 11 along the extension direction of the external guide post 8 under the drive of the external drive device.

[0077] Furthermore, in this embodiment, limiting posts 9 are provided on both the upper die holder 10 and the lower die holder 11, and the limiting posts 9 on the upper die holder 10 and the lower die holder 11 are arranged opposite to each other. The height of the limiting post 9 in the vertical direction is less than the height of the punching die 1 in the vertical direction; when the upper die holder 10 approaches the lower die holder 11 along the extension direction of the outer guide post 8 under the drive of the external drive device, if the limiting post 9 of the upper die holder 10 contacts the limiting post 9 of the lower die holder 11, the two limiting posts 9 will prevent the upper die holder 10 from pressing down further.

[0078] In addition, during installation, a pressure block 12 is provided in the positioning groove 111. One end of the pressure block 12 is beveled, and the end of the base plate 2 of the punching die 1 near the pressure block 12 is also beveled. The pressure block is fixedly mounted on the lower die base 11, and the bevel of the pressure block 12 corresponds to the bevel of the base plate 2 of the punching die 1, so as to press the base plate 2 of the punching die 1 against the lower die base 11. At the same time, the end of the base plate 2 away from the pressure block 12 is specifically fixed to the lower die 11 with screws to achieve front and rear locking of the base plate 2. When the punching die 1 is damaged, the punching die 1 can be disassembled simply by loosening the screws, thus enabling quick replacement.

[0079] Accordingly, further reading Figure 5 and Figure 14It is easy to see that in this embodiment, the bottom plate 2 of the punching module 1 is also provided with a through groove 21, and the lower die base 11 is provided with a waste groove 112 corresponding to the through groove 21, so that the waste generated by the punching component 3 punching the external water cutter 13 can pass through the through groove 21 on the bottom plate 2 and the waste groove 112 on the lower die base 11 in sequence, thereby being recycled.

[0080] It should be noted that in practical applications, the outer water cutter 13 can feed materials along the feeding direction under the guidance of the first guide and the second guide 43. At this time, the lip of the outer water cutter 13 can be pre-cut by the pre-cutting blade of the protrusion 431 of the second guide 43 until the movement of the outer water cutter 13 is blocked by the positioning block 62 of the second limit member 6. At this time, the outer water cutter 13 reaches the maximum feeding stroke.

[0081] Under the action of the driving device, the upper die holder 10 approaches the punching module 1 on the lower die holder 11 along the extension direction of the outer guide post 8, so that the upper die holder 10 contacts the punch extension block 34 of the punching assembly 3. It pushes the punch extension block 34 and the mounting block 31 connected to the punch extension block 34 together to press down and up along the concave groove of the concave table 51 in the vertical height direction, so that the cutting edge 321 on the end of the punch insert 32 moves downward, and then uses the cutting edge 321 to punch the pre-cut outer water cutter 13. The waste material punched off by the punch insert 32 can pass through the through groove 21 on the base plate 2 and the waste groove 112 on the lower die holder 11 in sequence, so as to be recycled. Since the cutting edge 321 of the punch insert 32 and the pre-cutting edge of the second guide 43 both extend along the feeding direction of the outer water cutter 13 and are coaxial, the punching position of the punch insert 32 is the same as the cutting position of the pre-cutting edge on the outer water cutter 13.

[0082] Therefore, after the outer water cutter 13 is punched, the external force applied to the upper die holder 10 will cause the upper die holder 10 to rise. At this time, the elastic element 7 will move the mounting block 31 and the punch insert 32 together in the vertical direction under its own elastic force until it is reset. At this time, the user can remove the outer water cutter 13 and proceed to the next step.

[0083] Correspondingly, the punching action of the two outer lips of the outer water cutter 13 using the punching fixture described above is similar, and will not be elaborated further here.

[0084] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A punching module, characterized in that, It includes a base plate and a punching assembly, a guide assembly, a first limiting member, and a second limiting member disposed on the base plate; The bottom end of the punching assembly is connected to the base plate via an elastic member, and the first limiting member is used to block the top end of the punching assembly to limit the maximum height of the punching assembly in the vertical direction. The guiding component is used to guide the feeding direction of the external water cutter and to pre-cut the external water cutter so that the punching component punches the pre-cut kerf of the external water cutter along the feeding direction; the second limiting member is used to block the external water cutter to limit the maximum feeding stroke of the external water cutter in the feeding direction. The punching assembly includes a mounting block, a punch insert, a baffle plate, and a punch extension block. The bottom end of the mounting block is connected to the elastic element, and the top end of the mounting block is connected to the punch extension block. Both the punch insert and the baffle plate are located on the side of the mounting block near the guide assembly, and one end of the punch insert is connected to the mounting block, while the other end of the punch insert has a cutting edge extending along the feeding direction.

2. The punching module according to claim 1, characterized in that, The guiding assembly includes a first guide member and a second guide member. The first guide member includes a guide support block and a guide block. One end of the guide support block is connected to the base plate, and the other end of the guide support block is detachably connected to the guide block. The guide block is higher than the second guide member in the vertical direction.

3. The punching module according to claim 2, characterized in that, The guide block is provided with at least one roller; the second guide member includes a protrusion extending along the feeding direction, and the top of the protrusion is provided with a pre-cutting blade.

4. The punching module according to claim 1, characterized in that, The second limiting component includes a limiting support block and a positioning block. One end of the limiting support block is connected to the base plate, and a fixing hole is provided on the other end of the limiting support block. The positioning block has a strip-shaped hole, and the positioning block is fixed to the other end of the limiting support block by a bolt. One end of the bolt passes through the strip-shaped hole and is threadedly connected to the fixing hole.

5. The punching module according to claim 1, characterized in that, The first limiting member includes a concave platform and a blocking member. The concave platform is disposed on the base plate, one end of the blocking member is connected to the concave platform, and the other end of the blocking member is used to block the mounting block. The concave platform has a concave groove, and the mounting block is slidably disposed in the concave groove.

6. The punching module according to claim 5, characterized in that, It also includes a die insert, which is detachably mounted on the die platform. The top of the die insert has a die protrusion extending along the feeding direction, and the die protrusion is coaxially arranged with the cutting edge of the punch insert.

7. A punching fixture, characterized in that, Includes an upper die holder, a lower die holder, and a punching die assembly as described in any one of claims 1-6; The upper die base and the lower die base are arranged opposite to each other, the punching die assembly is disposed on the lower die base, and the punching die assembly is located between the upper die base and the lower die base.

8. The punching fixture according to claim 7, characterized in that, It also includes an outer guide post, one end of which is connected to the lower mold base, and the other end of which passes through the upper mold base.

9. The punching fixture according to claim 7, characterized in that, It also includes a pressure block, which is disposed on the lower die base, and one end of the pressure block presses the bottom plate of the punching module against the lower die base.

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