A punch tool

Abstract

The application relates to a die cutting tool applied in the field of semiconductor packaging, which comprises a fixed seat arranged on an upper die, a plurality of placing grooves are arranged on the end face of the fixed seat away from the upper die, a plurality of cutting blocks are respectively arranged in the placing grooves, the cutting blocks constitute a cutting part, and a die cutting groove is respectively arranged on each cutting block, and a fixing unit for limiting the cutting blocks on the fixed seat is arranged on the fixed seat. The application has the technical effect that each cutting block becomes an independent module, when local blade edges are worn, only the cutting block at the corresponding worn position needs to be replaced, the fixed seat and other cutting blocks not worn can still be used, material cost is greatly saved, economy is improved, and production flexibility is enhanced.

Description

Technical Field

[0001] This application relates to the field of semiconductor packaging technology, and in particular to a punching tool. Background Technology

[0002] Copper bonding has been widely used in the packaging of semiconductor power devices, serving as a primary means of mechanical support, electrical connection, and heat dissipation.

[0003] In related technologies, the cutting blade is a one-piece blade, which is mounted on the punch holder. The blade holder is mounted on the upper die of the stamping equipment. The stamping force provided by the stamping equipment is transmitted to the punch holder through the upper die holder, and then finally to the one-piece blade to achieve the shearing of the frame copper sheet.

[0004] When the aforementioned blades are used to cut copper sheets, the cutting edge will gradually wear down and become dull. However, since the blades are made of one piece, the wear is usually concentrated in a local area. Local wear can easily damage the one-piece blade, thus requiring the entire blade to be replaced, which is not economical. Summary of the Invention

[0005] To address the issue that wear on a one-piece blade is often concentrated in a localized area, leading to damage and requiring complete blade replacement which is economical, this application provides a punching tool with the following technical solution: It includes a fixed base mounted on an upper die. The fixed base has several placement grooves on its end face away from the upper die. Each of the placement grooves contains a cutting block, which forms a cutting section and has punching grooves on it. The fixed base also has a fixing unit for limiting the cutting blocks on the fixed base.

[0006] In one specific implementation, the fixing unit includes a cover plate connected to a fixing seat via a connecting component. The cover plate has cutting holes corresponding to the cutting section, and several of the cutting blocks are respectively pressed against the bottom of the cover plate and the placement groove.

[0007] In one specific implementation, the connecting assembly includes a mounting bolt passing through the cover plate, and the end face of the fixing seat facing the cover plate has a threaded groove that matches the mounting bolt, with one end of the mounting bolt facing the fixing seat threadedly connected to the threaded groove.

[0008] In one specific implementation, a plurality of the placement slots are arranged along the fixed base array, and a partition is provided between each two adjacent placement slots.

[0009] In one specific implementation, the end of the spacer away from the fixed base is provided with an inclined guide surface.

[0010] In one specific implementation, the slitting block includes a bottom block that matches the placement groove, the punching groove is formed on the bottom block, a limiting block is provided on the bottom block, a limiting groove is formed on the end face of the fixing seat away from the upper mold, the bottom block is mounted in the placement groove and the limiting block is mounted in the limiting groove.

[0011] In one specific implementation, the cover plate has a guide post on the surface facing the fixing seat, and the fixing seat has a guide groove that matches the guide post, with the guide post inserted into the guide groove.

[0012] In one specific implementation scheme, the end face of the cover plate facing the fixed seat is provided with an installation groove, the bottom of the installation groove is provided with a compression spring, and the end of the compression spring away from the cover plate is provided with a pressure block, the pressure block is pressed against the limiting block and the compression spring.

[0013] In one specific implementation, the mounting groove has an annular guide groove at one end facing the fixing seat.

[0014] In one specific implementation, a rubber pad is provided at the end of the pressure block away from the compression spring, and the rubber pad is pressed against the pressure block and the limiting block.

[0015] In summary, this application has the following beneficial technical effects: by replacing the one-piece blade with a cutting section composed of several cutting blocks, each cutting block becomes an independent module. When the local cutting edge is worn, only the cutting block at the corresponding worn position needs to be replaced, while the fixing seat and other unworn cutting blocks can still be used, which greatly saves consumable costs, improves economic efficiency, and enhances production flexibility. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is a schematic diagram illustrating the structure of the placement slot in the embodiments of this application.

[0018] Figure 3 This is a schematic diagram illustrating the structure of the segmented blocks in the embodiments of this application.

[0019] Figure 4 This is a schematic diagram illustrating the structure of the compression spring in the embodiments of this application.

[0020] Reference numerals: 1. Fixing base; 2. Placement groove; 3. Punching groove; 4. Cover plate; 5. Spacer; 6. Bottom block; 7. Limiting block; 8. Limiting groove; 9. Guide post; 10. Guide groove; 11. Mounting groove; 12. Compression spring; 13. Annular guide groove; 14. Rubber pad; 15. Pressure block. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0022] This application discloses a punching tool.

[0023] Reference Figure 1 , Figure 2 and Figure 3 The punching tool includes a fixed seat 1 set on the upper mold. The fixed seat 1 has a plurality of placement grooves 2 on the end face away from the upper mold. Each of the placement grooves 2 has a slitting block. The slitting blocks constitute a cutting part and each of the slitting blocks has a punching groove 3. In the embodiments of this application, the replaceable slitting blocks are made of superhard wear-resistant materials such as cemented carbide, polycrystalline diamond or cubic boron nitride. The fixed seat 1 is provided with a fixing unit for limiting the slitting blocks on the fixed seat 1.

[0024] Therefore, by replacing the one-piece blade with a cutting section composed of several cutting blocks, each cutting block becomes an independent module. When the local cutting edge wears, only the cutting block at the corresponding wear location needs to be replaced, while the fixing seat 1 and other unworn cutting blocks can still be used, which greatly saves consumable costs and improves economic efficiency. At the same time, the modular cutting blocks facilitate maintenance and replacement without disassembling the overall punching tool, enhancing production flexibility.

[0025] Reference Figure 1 , Figure 2 and Figure 3 Several placement slots 2 are arranged in an array along the fixed base 1. In this embodiment, four placement slots 2 are arranged along the length of the fixed base 1 as an example. A partition block 5 is provided between each two adjacent placement slots 2. The partition block 5 separates the slitting blocks and reduces the possibility of interference between adjacent slitting blocks during processing. An inclined guide surface is provided at the end of the partition block 5 away from the fixed base 1. The inclined guide surface guides the slitting blocks, making it easier for the slitting blocks to be assembled into the placement slots 2 along the inclined guide surface.

[0026] Reference Figure 1 , Figure 2 and Figure 3The slitting block includes a bottom block 6 that matches the size of the placement groove 2. The placement groove 2 limits the position of the bottom block 6, reducing the possibility of positional deviation. A punching groove 3 is formed on the bottom block 6. In this embodiment, the shape of the punching groove 3 is set according to the copper sheet to be cut, and the punching groove 3 matches the punching clearance of the lower die of the stamping equipment. Limiting blocks 7 are fixedly connected to both ends of the bottom block 6 along the length direction. A limiting groove 8 is formed on the end face of the fixing seat 1 away from the upper die. The bottom block 6 is mounted in the placement groove 2 and the limiting blocks 7 are mounted in the limiting groove 8. The limiting groove 8 limits the position of the limiting blocks 7 and provides a balanced radial locking force to the slitting block, further improving the stability of the slitting block mounted on the fixing seat 1.

[0027] Reference Figure 1 , Figure 2 and Figure 3 The fixing unit includes a cover plate 4 connected to the fixing base 1 via a connecting assembly. The cover plate 4 has cutting holes corresponding to the cutting section positions. Several slits are respectively pressed against the cover plate 4 and the bottom of the placement groove 2. The cover plate 4 limits the position of the slits, reducing the possibility of them falling off the fixing base 1. The connecting assembly includes mounting bolts passing through the cover plate 4. The end face of the fixing base 1 facing the cover plate 4 has a threaded groove matching the size of the mounting bolt. One end of the mounting bolt facing the fixing base 1 is threaded into the threaded groove. Operators can remove the cover plate 4 from the fixing base 1 by unscrewing the bolts, achieving a detachable connection of the cover plate 4, increasing flexibility and facilitating subsequent replacement of the slits.

[0028] Reference Figure 1 , Figure 2 and Figure 4 A guide post 9 is fixedly connected to the surface of the cover plate 4 facing the fixed base 1. The fixed base 1 has a guide groove 10 that matches the size of the guide post 9. The guide post 9 is inserted into the guide groove 10. When installing the cover plate 4, the guide post 9 will be inserted into the guide groove 10 before the mounting bolts, guiding the cover plate 4 to fall accurately to the predetermined position, so that the cutting hole on the cover plate 4 corresponds to the position of the cutting part composed of cutting blocks on the fixed base 1.

[0029] Reference Figure 1 , Figure 2 and Figure 4 A mounting groove 11 is provided on the end face of the cover plate 4 facing the fixed seat 1. A compression spring 12 is fixedly connected to the bottom of the mounting groove 11. A pressure block 15 is connected to the end of the compression spring 12 away from the cover plate 4. The pressure block 15 is pressed between the limiting block 7 and the compression spring 12. In this embodiment, the pressure block 15 and the limiting block 7 are located on the same straight line in the vertical direction. The elastic compression force of the compression spring 12 can compensate for the small height difference that may exist in each cutting block, so that the limiting block 7 is tightly attached to the bottom of the limiting groove 8, reducing the possibility of the cutting block loosening during the stamping process.

[0030] Reference Figure 1 , Figure 2 and Figure 4 An annular guide groove 13 is provided at the end of the mounting groove 11 facing the fixed base 1. The annular guide groove 13 guides the movement of the pressure block 15. When the compression spring 12 is compressed or rebounds, the annular guide groove 13 guides the pressure block 15 to move up and down in the vertical direction, reducing the possibility of accidental deviation that could cause accidental interference between the pressure block 15 and the fixed base 1. A rubber pad 14 is installed at the end of the pressure block 15 away from the compression spring 12. The rubber pad 14 is pressed between the pressure block 15 and the limiting block 7. Pressing the rubber pad 14 against the limiting block 7 of the slitting block can greatly increase the static friction between the contact surfaces. At the same time, the elasticity of the rubber pad 14 can absorb some of the high-frequency vibration and impact energy, further improving the stability of the slitting block's position on the fixed base 1.

[0031] The implementation principle of this application embodiment is as follows: the one-piece blade is replaced with a cutting part composed of several cutting blocks, so that each cutting block becomes an independent module. When the local cutting edge is worn, the operator removes the cover plate 4 from the fixed seat 1 by bolting. Only the cutting block at the corresponding worn position needs to be replaced, so that the bottom block 6 of the cutting block at that position is set in the placement groove 2 and the limiting block 7 is set in the limiting groove 8. After replacing the cutting block, the cover plate 4 is bolted back to the fixed seat 1. The fixed seat 1 and other unworn cutting blocks can still be used, which greatly saves consumable costs and improves economy. At the same time, the modular cutting blocks facilitate the maintenance and replacement of the cutting blocks without disassembling the overall punching tool, which enhances production flexibility.

[0032] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A punching tool, characterized in that: It includes a fixed seat (1) set on the upper mold, the fixed seat (1) having a plurality of placement grooves (2) on the end face away from the upper mold, each of the plurality of placement grooves (2) having a cutting block, the plurality of cutting blocks forming a cutting part and each of the plurality of cutting blocks having a punching groove (3), the fixed seat (1) having a fixing unit for limiting the cutting block on the fixed seat (1).

2. The punching tool according to claim 1, characterized in that: The fixing unit includes a cover plate (4) connected to the fixing seat (1) via a connecting component. The cover plate (4) has a cutting hole corresponding to the cutting part. Several of the cutting blocks are respectively pressed against the bottom of the cover plate (4) and the placement groove (2).

3. The punching tool according to claim 2, characterized in that: The connecting assembly includes a mounting bolt that passes through the cover plate (4). The end face of the fixing seat (1) facing the cover plate (4) has a threaded groove that matches the mounting bolt. One end of the mounting bolt facing the fixing seat (1) is threaded into the threaded groove.

4. The punching tool according to claim 1, characterized in that: Several of the placement slots (2) are arranged in an array along the fixed base (1), and a partition block (5) is provided between two adjacent placement slots (2).

5. The punching tool according to claim 4, characterized in that: The partition block (5) has an inclined guide surface at one end away from the fixed base (1).

6. The punching tool according to claim 1, characterized in that: The slitting block includes a bottom block (6) that matches the placement groove (2), the punching groove (3) is opened on the bottom block (6), the bottom block (6) is provided with a limiting block (7), the fixing seat (1) is provided with a limiting groove (8) on the end face away from the upper mold, the bottom block (6) is mounted in the placement groove (2) and the limiting block (7) is mounted in the limiting groove (8).

7. The punching tool according to claim 2, characterized in that: The cover plate (4) has a guide post (9) on the surface facing the fixed seat (1), and the fixed seat (1) has a guide groove (10) that matches the guide post (9), and the guide post (9) is inserted into the guide groove (10).

8. The punching tool according to claim 7, characterized in that: The cover plate (4) has an installation groove (11) on the end face facing the fixed seat (1). A compression spring (12) is provided at the bottom of the installation groove (11). A pressure block (15) is provided at the end of the compression spring (12) away from the cover plate (4). The pressure block (15) is pressed between the limiting block (7) and the compression spring (12).

9. The punching tool according to claim 8, characterized in that: The mounting groove (11) has an annular guide groove (13) at one end facing the fixed base (1).

10. The punching tool according to claim 8, characterized in that: The pressure block (15) has a rubber pad (14) at one end away from the compression spring (12), and the rubber pad (14) is pressed against the pressure block (15) and the limiting block (7).

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