Lead frame stamping die

Abstract

This utility model discloses a lead frame stamping die, including a fixed base, a bottom positioning mechanism, a lower die mechanism, and a connecting frame. The fixed base has a bottom positioning mechanism on its top for easy maintenance and repair. The bottom positioning mechanism is fixedly mounted on its top for stamping the bottom of the lead frame. The connecting frame has an edge positioning mechanism. The bottom positioning mechanism can cooperate with the lower die mechanism for stamping. Furthermore, the bottom positioning mechanism can be disassembled and maintained separately when damaged, eliminating the need for complete replacement and ensuring better fit when reinstalling new and old parts. The edge positioning mechanism positions both ends of the material, preventing wrinkles during stamping.

Description

Technical Field

[0001] This utility model relates to the field of lead frame manufacturing technology, specifically a lead frame stamping die. Background Technology

[0002] As a key component in the semiconductor packaging industry chain, the performance and cost of lead frames directly impact a company's market competitiveness. There are two main manufacturing processes for semiconductor packaging lead frames: etching and stamping. Currently, stamping remains the core manufacturing method for lead frames of mainstream packaging products due to its significant cost advantages in mass production. However, this advantage is increasingly being weakened by the inherent lifespan bottleneck of its core production equipment, the stamping dies, becoming a prominent pain point restricting the company's production efficiency, cost control, and supply chain resilience.

[0003] Stamping dies have a limited lifespan, calculated in terms of the number of stamping cycles. Most dies have a lifespan of 25,000 cycles. This is because during the stamping process, the punch and die inserts wear down. After a certain number of stamping cycles, the die inserts and die fixing plates need maintenance. When the accumulated grinding thickness reaches 3mm after multiple maintenance cycles, the die's lifespan is over, and it needs to be replaced. However, the die fixing plate is replaced and installed on the die by die maintenance personnel. This can lead to incompatibility issues, preventing the die from functioning properly and affecting production. Therefore, we propose a lead frame stamping die. Utility Model Content

[0004] The purpose of this invention is to provide a lead frame stamping die to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lead frame stamping die, comprising a fixed base, a bottom positioning mechanism, and a lower die mechanism. The fixed base has fixed grooves at all four corners, and connecting frames are fixedly connected to both sides of the top of the fixed base. The top of the fixed base is provided with a bottom positioning mechanism for easy maintenance and repair. The bottom positioning mechanism is fixedly mounted on the top of the bottom positioning mechanism to support the stamping of the bottom of the lead frame. The connecting frames are provided with edge positioning mechanisms for positioning materials on both sides of the lower die mechanism.

[0006] Furthermore, the bottom positioning mechanism includes a die fixing plate, a die back plate, a die pad, a die insert, and a wear and polishing layer. The die fixing plate is configured in two sets, with a die back plate between the two sets of die fixing plates. A die insert is provided on the top of the die back plate through the die pad. Both the die fixing plate and the die pad have a wear and polishing layer on their tops.

[0007] Furthermore, the lower mold mechanism includes a fixed plate, a lower mold body, locking bolts, and guide blocks. The fixed plate is installed on the cavity mold fixed plate by multiple sets of locking bolts. The lower mold body is fixedly installed on the top of the fixed plate, and arc-shaped guide blocks are fixedly connected to both sides of the fixed plate.

[0008] Furthermore, the edge positioning mechanism includes a drive cylinder, a drive frame, a rotating shaft, and a positioning roller. The drive cylinder is fixedly mounted on the connecting frame, and the output end of the drive cylinder is fixedly connected to an arc-shaped drive frame. The rotating shaft is rotatably connected to the drive frame, and the positioning roller is fixedly connected to the outside of the rotating shaft.

[0009] Furthermore, the top of the fixed base is fixedly connected to the side wall of the connecting frame by a reinforcing plate made of rigid material, and the positioning roller is made of rubber material.

[0010] Furthermore, the thickness of the wear-reducing layer is set to 3mm.

[0011] Compared with the prior art, the present invention has the following advantages: the fixed base and fixed groove provided by the present invention can fix the entire device in place, and the bottom positioning mechanism provided thereafter can cooperate with the lower mold mechanism for installation. The bottom positioning mechanism can cooperate with the lower mold mechanism and the punch for stamping. When the bottom positioning mechanism is damaged, it can be disassembled and maintained separately without replacing all of them at once, which also ensures that the new and old parts are more compatible when reinstalled. The edge positioning mechanism provided thereafter can position the two ends of the material, thereby preventing wrinkles from appearing during the stamping of the material. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model; Figure 2 This is a three-dimensional structural diagram of the bottom positioning mechanism and the lower mold mechanism of this utility model; Figure 3 This is a three-dimensional structural schematic diagram of the edge positioning mechanism of this utility model; Figure 4 This is a schematic diagram of the front view of this utility model.

[0013] In the diagram: 1. Fixed base; 2. Fixed groove; 3. Bottom positioning mechanism; 4. Lower mold mechanism; 5. Connecting frame; 6. Edge positioning mechanism; 7. Die fixing plate; 8. Die back plate; 9. Die pad; 10. Die insert; 11. Wear and polishing layer; 12. Fixing plate; 13. Lower mold body; 14. Locking bolt; 15. Guide block; 16. Drive cylinder; 17. Drive frame; 18. Rotating shaft; 19. Positioning roller; 20. Reinforcing plate. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-4 This utility model provides a technical solution: a lead frame stamping die, including a fixed base 1, a bottom positioning mechanism 3 and a lower die mechanism 4. The fixed base 1 has a fixed groove 2 at each of its four corners. The top two sides of the fixed base 1 are fixedly connected to a connecting frame 5. The top of the fixed base 1 is provided with a bottom positioning mechanism 3 for easy maintenance and repair. The bottom positioning mechanism 4 for bearing and stamping the bottom of the lead frame is fixedly installed on the top of the bottom positioning mechanism 3. The connecting frame 5 is provided with an edge positioning mechanism 6 for positioning the material on both sides of the lower die mechanism 4.

[0016] The fixed base 1 and fixed groove 2 can fix the entire device in place. The bottom positioning mechanism 3 can cooperate with the lower mold mechanism 4. The bottom positioning mechanism 3 can cooperate with the lower mold mechanism 4 and the punch for stamping. When the bottom positioning mechanism 3 is damaged, it can be disassembled and maintained separately without replacing it all at once. This also ensures that the old and new parts are more compatible when reinstalled. The edge positioning mechanism 6 can position the two ends of the material, thereby preventing wrinkles from appearing during the stamping process.

[0017] Please see Figures 1-3 The bottom positioning mechanism 3 includes a die fixing plate 7, a die back plate 8, a die pad 9, a die insert 10, and a wear and polishing layer 11. The die fixing plate 7 is configured in two sets, and the die back plate 8 is provided between the two sets of die fixing plates 7. The die insert 10 is provided on the top of the die back plate 8 through the die pad 9. The top of both the die fixing plate 7 and the die pad 9 is provided with a wear and polishing layer 11, and the thickness of the wear and polishing layer 11 is set to 3mm.

[0018] The die back plate 8 and die pad 9 are positioned between the die fixing plate 7. The die insert 10, which needs to contact the punch, is then positioned on the die pad 9. Both the die fixing plate 7 and the die pad 9 have a 3mm thick wear-reducing layer 11 on their tops. This allows the wear-reducing layer 11 to be polished and repaired when the die insert 10 is repositioned, making it easier to accurately insert and install the die insert 10 and preventing situations where new die inserts 10 cannot be accurately placed.

[0019] Please see Figures 1-3 The lower mold mechanism 4 includes a fixed plate 12, a lower mold body 13, locking bolts 14 and guide blocks 15. The fixed plate 12 is installed on the cavity mold fixed plate 7 by multiple sets of locking bolts 14. The lower mold body 13 is fixedly installed on the top of the fixed plate 12, and arc-shaped guide blocks 15 are fixedly connected to both sides of the fixed plate 12.

[0020] The fixed plate 12 is installed and fixed by locking bolts 14. The lower mold body 13 is then formed by punching through it. The arc-shaped guide blocks 15 on both sides of the fixed plate 12 can prevent scratches when the material is pulled and conveyed.

[0021] Please see Figures 1-3 The edge positioning mechanism 6 includes a drive cylinder 16, a drive frame 17, a rotating shaft 18, and a positioning roller 19. The drive cylinder 16 is fixedly installed on the connecting frame 5. The output end of the drive cylinder 16 is fixedly connected to the arc-shaped drive frame 17. The rotating shaft 18 is rotatably connected to the drive frame 17. The positioning roller 19 is fixedly connected to the outside of the rotating shaft 18.

[0022] After the material is conveyed, the drive cylinder 16 drives the drive frame 17, the rotating shaft 18 and the positioning roller 19 to descend. This allows the positioning roller 19 to squeeze and position the material, preventing the material from becoming too loose. When the material is being pulled and moved, the positioning roller 19 and the rotating shaft 18 can rotate along the drive frame 17, facilitating timely feeding.

[0023] Please see Figures 1-3 The top of the fixed base 1 is fixedly connected to the side wall of the connecting frame 5 by a reinforcing plate 20 made of rigid material. The positioning roller 19 is made of rubber material. The reinforcing plate 20 made of rigid material can prevent the connecting frame 5 from deforming, while the positioning roller 19 is made of rubber material to prevent damage to the material.

[0024] In use, firstly, the fixed base 1 and fixed groove 2 can fix the entire device in place. Then, the bottom positioning mechanism 3 can cooperate with the lower mold mechanism 4 for installation. The bottom positioning mechanism 3 can cooperate with the lower mold mechanism 4 and the punch for stamping. Furthermore, if the bottom positioning mechanism 3 is damaged, it can be disassembled and maintained separately, without needing to replace it all at once, ensuring a better fit when reinstalling new and old parts. The edge positioning mechanism 6 can then position both ends of the material, preventing wrinkles during stamping. The die back plate 8 and die pad 9 are positioned between the die fixing plate 7. The die insert 10, which needs to contact the punch, is placed on the die pad 9. Both the die fixing plate 7 and the die pad 9 have 3mm thick wear marks on their tops. The grinding layer 11 is designed to be ground and repaired when the die insert 10 is repositioned, thus facilitating the accurate insertion and installation of the die insert 10 and preventing the inaccurate placement of new die inserts 10. The fixing plate 12 is fixed by locking bolts 14, and the lower die body 13 can be formed by punching through it. The arc-shaped guide blocks 15 on both sides of the fixing plate 12 can prevent scratches caused by material pulling and conveying. After the material is conveyed, the drive cylinder 16 drives the drive frame 17, the rotating shaft 18 and the positioning roller 19 to descend, so that the positioning roller 19 can squeeze and position the material to prevent the material from becoming too loose. When the material is pulled and moved, the positioning roller 19 and the rotating shaft 18 can rotate along the drive frame 17 for timely feeding.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lead frame stamping die, comprising a fixed base (1), a bottom positioning mechanism (3), and a lower die mechanism (4), wherein fixed slots (2) are provided at the four corners of the fixed base (1), and connecting brackets (5) are fixedly connected to both sides of the top of the fixed base (1), characterized in that: The top of the fixed base (1) is provided with a bottom positioning mechanism (3) for easy maintenance and repair. The bottom positioning mechanism (3) is fixedly installed with a lower mold mechanism (4) for bearing and stamping the bottom of the lead frame. The connecting frame (5) is provided with an edge positioning mechanism (6) for positioning the materials on both sides of the lower mold mechanism (4).

2. The lead frame stamping die according to claim 1, characterized in that: The bottom positioning mechanism (3) includes a die fixing plate (7), a die back plate (8), a die pad plate (9), a die insert (10), and a wear and polishing layer (11). The die fixing plate (7) is set in two sets, and a die back plate (8) is provided between the two sets of die fixing plates (7). A die insert (10) is provided on the top of the die back plate (8) through the die pad plate (9). A wear and polishing layer (11) is provided on the top of both the die fixing plate (7) and the die pad plate (9).

3. The lead frame stamping die according to claim 2, characterized in that: The lower mold mechanism (4) includes a fixed plate (12), a lower mold body (13), locking bolts (14) and guide blocks (15). The fixed plate (12) is installed on the cavity mold fixed plate (7) by multiple sets of locking bolts (14). The lower mold body (13) is fixedly installed on the top of the fixed plate (12), and arc-shaped guide blocks (15) are fixedly connected to both sides of the fixed plate (12).

4. The lead frame stamping die according to claim 3, characterized in that: The edge positioning mechanism (6) includes a drive cylinder (16), a drive frame (17), a rotating shaft (18), and a positioning roller (19). The drive cylinder (16) is fixedly installed on the connecting frame (5). The output end of the drive cylinder (16) is fixedly connected to the arc-shaped drive frame (17). The rotating shaft (18) is rotatably connected to the drive frame (17). The positioning roller (19) is fixedly connected to the outside of the rotating shaft (18).

5. A lead frame stamping die according to claim 4, characterized in that: The top of the fixed base (1) is fixedly connected to the side wall of the connecting frame (5) by a reinforcing plate (20) made of rigid material, and the positioning roller (19) is made of rubber material.

6. A lead frame stamping die according to claim 4, characterized in that: The thickness of the wear-reducing layer (11) is set to 3 mm.

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