A batch flattening and slicing device for copper strip with lead frame

Abstract

This utility model discloses a batch leveling and slicing device for copper strips in lead frame technology. It includes a support platform, a first leveling block, a second leveling block, and a motor. The bottom corners of both the first and second leveling blocks are curved. A longitudinal placement groove is formed on the top of the support platform, and a transverse cutting groove is formed on the top of the support platform. The first and second leveling blocks are located on opposite sides of the cutting groove, pressing and leveling the copper strip. A connecting shaft is fixedly connected to the output shaft of the motor. Fixed plates are rotatably connected to both sides of the connecting shaft, and a drive wheel is fixedly connected through the middle of the connecting shaft. The drive wheel is located above the placement groove of the support platform. This invention solves the problem that in traditional copper strip leveling and slicing devices, after the copper strip is cut by a slicer and then punched and leveled by a punch press, the quality of the copper strip cannot be guaranteed during slicing, and the incomplete flatness of the copper strip makes it difficult to control the quality of the cut surface.

Description

Technical Field

[0001] This utility model relates to the field of lead frame technology, specifically a lead frame copper strip batch leveling and slicing device. Background Technology

[0002] Semiconductor lead frames, as chip carriers of integrated circuits, are key structural components that use bonding materials to achieve electrical connections between the internal circuit leads and external leads of the chip, forming an electrical circuit. During the manufacturing process, copper strips need to be flattened and sliced ​​to facilitate subsequent processing.

[0003] However, in the traditional copper strip leveling and slicing device, after the copper strip is cut into the material by a slicer and then punched and leveled by a punch press, the quality of the copper strip cannot be guaranteed during slicing. The incomplete flatness of the copper strip makes it difficult to control the quality of the cut surface. Utility Model Content

[0004] The purpose of this invention is to provide a batch flattening and slicing device for copper strips with lead frames, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a batch flattening and slicing device for copper strips with lead frames, comprising a support platform, and further comprising,

[0006] The first and second leveling blocks have curved corners on one side of their bottoms. The top of the support platform has a longitudinal placement groove and a transverse cutting groove. The first and second leveling blocks are located on both sides of the cutting grooves to extrude and level the copper strip.

[0007] The motor has a connecting shaft fixedly connected to its output shaft end. Fixed plates are rotatably connected to both sides of the connecting shaft. A drive wheel is fixedly connected to the middle of the connecting shaft. The drive wheel is located above the placement groove of the support platform and drives the copper strip forward.

[0008] Preferably, a support plate is fixedly connected to the top of the fixed plate, a fixed rod is fixedly connected to the top of the motor, the tops of the fixed rod, the first leveling block and the second leveling block are all fixedly connected to the bottom of the support plate, the bottom sides of the support plate are fixedly connected to the second side plate, and the bottom of the second side plate is fixedly connected to the bottom plate.

[0009] Preferably, each of the four bottom corners of the support platform is fixedly connected to a pillar, and the bottom of the pillar is fixedly connected to the top of the base plate.

[0010] Preferably, a feeding platform is fixedly connected to one side of the support platform.

[0011] Preferably, the top of the support plate has a through groove, the top of the support plate is fixedly connected to a side plate, the top of the side plate is fixedly connected to a top plate, the bottom of the top plate is fixedly connected to a push rod motor, the bottom of the push rod of the push rod motor is fixedly connected to a connecting plate, the bottom of the connecting plate is fixedly connected to a slicing blade, the slicing blade penetrates the inner wall of the through groove of the sliding connection support plate, and the slicing blade is located between the first leveling block and the second leveling block.

[0012] Preferably, a controller is fixedly connected to the top side of the support plate, and the controller is electrically connected to the push rod motor and the motor via a transmission line.

[0013] Preferably, the corner of the placement groove of the support platform is set as an arc surface and this corner is located inside the groove on the side away from the leveling block.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention uses two leveling blocks to level the copper strip twice. The tip of the slicing blade is flush with the side of the leveling block, so the cutting surface is located at the edge of the leveling block. At this time, the leveling block also restricts the copper strip from shifting, making the cutting surface flush with the edge of the leveling block, improving the cutting surface quality, and ensuring the quality of the copper strip after slicing.

[0016] This invention uses two sets of drive wheels to propel the copper strip forward while simultaneously pressing and fixing it during cutting, thus preventing the copper strip from shifting under force and reducing the quality of the cut surface. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a disassembly diagram of the slicing blade structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the structural distribution at the groove of this utility model;

[0020] Figure 4 This utility model Figure 3 A magnified view of a portion of point A in the middle.

[0021] In the diagram: 1. Support platform; 2. Grooving; 3. Leveling block one; 4. Leveling block two; 5. Support column; 6. Feeding platform; 7. Motor; 8. Fixing rod; 9. Fixing plate; 10. Connecting shaft; 11. Drive wheel; 12. Push rod motor; 13. Top plate; 14. Side plate one; 15. Connecting plate; 16. Slicing blade; 17. Support plate; 18. Side plate two; 19. Bottom plate; 20. Controller. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-4 This utility model provides a technical solution: a batch flattening and slicing device for copper strips with lead frames, including a support platform 1, and further comprising,

[0024] The bottom corners of the first and second leveling blocks 3 and 4 are both set as arc surfaces. The top of the support platform 1 has a longitudinal placement groove and the top of the support platform 1 has a transverse cutting groove 2. The first and second leveling blocks 3 and 4 are located on both sides of the cutting groove 2 to extrude and level the copper strip.

[0025] The motor 7 has a connecting shaft 10 fixedly connected to its output shaft end. The connecting shaft 10 has a fixed plate 9 rotatably connected through both sides. The connecting shaft 10 has a drive wheel 11 fixedly connected through the middle. The drive wheel 11 is located above the placement groove of the support platform 1 and drives the copper strip forward.

[0026] A support plate 17 is fixedly connected to the top of the fixed plate 9, and a fixed rod 8 is fixedly connected to the top of the motor 7. The tops of the fixed rod 8, the first leveling block 3, and the second leveling block 4 are all fixedly connected to the bottom of the support plate 17. Side plates 18 are fixedly connected to both sides of the bottom of the support plate 17. A bottom plate 19 is fixedly connected to the bottom of the side plates 18. The support plate 17 plays a supporting and fixing role, so that the drive wheel 11 is located in the placement groove of the support platform 1 with a certain gap for the copper strip to pass through.

[0027] The bottom four corners of the support platform 1 are fixedly connected to the support column 5. The bottom of the support column 5 is fixedly connected to the top of the base plate 19, so that the height of the support platform 1 is fixed and forms a stable support for the support platform 1.

[0028] A feeding table 6 is fixedly connected to one side of the support table 1 for feeding the leveled and sliced ​​copper strip into the next processing equipment.

[0029] The top of the support plate 17 has a through groove. The top of the support plate 17 is fixedly connected to a side plate 14. The top of the side plate 14 is fixedly connected to a top plate 13. The bottom of the top plate 13 is fixedly connected to a push rod motor 12. The bottom of the push rod of the push rod motor 12 is fixedly connected to a connecting plate 15. The bottom of the connecting plate 15 is fixedly connected to a slicing blade 16. The slicing blade 16 passes through the inner wall of the through groove of the support plate 17. The slicing blade 16 is located between the leveling block 3 and the leveling block 4. The slicing blade 16 moves down to cut the copper strip exposed between the leveling block 3 and the leveling block 4.

[0030] A controller 20 is fixedly connected to the top side of the support plate 17. The controller 20 is electrically connected to the push rod motor 12 and the motor 7 through a transmission line. The controller 20 controls the push rod motor 12 and the motor 7 to start intermittently. When the motor 7 starts, it transports and moves the copper strip. Then the motor 7 is turned off, the position of the copper strip is fixed, and the push rod motor 12 starts to cut the copper strip.

[0031] The corner of the placement groove of the support platform 1 is set as an arc surface and this corner is located inside the cutting groove 2 on the side away from the leveling block 3. When the copper strip extends from the bottom of the leveling block 3 and contacts this corner, the front end of the copper strip can slide along the arc surface because this corner is arc surface, thus avoiding the corner from jamming the copper strip.

[0032] Working principle: Multiple copper strips are placed into the openings on the side of the support platform 1 away from the feeding platform 6 in the placement groove. The copper strips are pushed forward a certain distance so that the front end of the copper strip extends into the gap between the drive wheel 11 and the placement groove. The motor 7 starts and drives the copper strip forward through the drive wheel 11. The copper strip slides into the gap between the leveling block 3 and the placement groove. Since the bottom of the leveling block 3 has an arc surface that contacts the copper strip first, the possibility of the copper strip being stuck is avoided. The leveling block 3, in conjunction with the placement groove, holds the copper strip in place. The strip is flattened and straightened. Then, the copper strip extends from the bottom of the straightening block 3 into the groove 2. Due to its own weight, the front end of the copper strip contacts the corner of the placement groove on the side of the groove 2 away from the straightening block 3. This corner is curved, which also prevents the copper strip from getting stuck. This allows the copper strip to extend into the bottom of the straightening block 4 for secondary straightening. The copper strip continues to move to the bottom of the drive wheel 11 on the other side for secondary driving. After advancing to the preset distance, the controller 20 controls the motor 7 to turn off and the push rod motor 1 to turn on. 2. The push rod motor 12 pushes the slicing blade 16 downward to slice the copper strip material remaining in the cutting groove 2. The drive wheels 11 on both sides press and fix the copper strip material. The tip of the bottom of the slicing blade 16 is flush with the side of the leveling block 3. Therefore, the cutting surface is located at the edge of the leveling block 3. At this time, the leveling block 3 also plays a role in limiting the deviation of the copper strip material, making the cutting surface flush with the edge of the leveling block 3, thus improving the cutting surface quality. After cutting, the slicing blade 16 moves up to the initial position. The controller 20 controls the push rod motor 12 to turn the motor 7 on and off, thereby transmitting the sliced ​​copper strip material. By repeating the above process, the copper strip material can be continuously leveled and sliced. While ensuring the cutting surface quality, the sliced ​​copper strip material is leveled a second time, improving the processing quality. This solves the problem that in the traditional copper strip leveling and slicing device, after the copper strip is cut by the slicing machine and then punched and leveled by the punch press, the quality of the copper strip cannot be guaranteed during slicing. The incomplete flatness of the copper strip makes it difficult to control the quality of the cutting surface.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] 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 batch flattening and slicing device for copper strips with lead frames, comprising a support platform (1), characterized in that: It also includes, The first leveling block (3) and the second leveling block (4) are both set as arc surfaces at the bottom corners of the first leveling block (3) and the second leveling block (4). The top of the support platform (1) is longitudinally provided with a placement groove, and the top of the support platform (1) is transversely provided with a cutting groove (2). The first leveling block (3) and the second leveling block (4) are located on both sides of the cutting groove (2) to extrude and level the copper strip. The motor (7) has a connecting shaft (10) fixedly connected to its output shaft end. The connecting shaft (10) has a fixed plate (9) rotatably connected through both sides. The connecting shaft (10) has a drive wheel (11) fixedly connected through the middle. The drive wheel (11) is located above the placement groove of the support platform (1) and drives the copper strip forward.

2. The lead frame copper strip batch leveling and slicing device according to claim 1, characterized in that: The top of the fixed plate (9) is fixedly connected to the support plate (17), the top of the motor (7) is fixedly connected to the fixed rod (8), the top of the fixed rod (8), the first leveling block (3) and the second leveling block (4) are all fixedly connected to the bottom of the support plate (17), the bottom sides of the support plate (17) are fixedly connected to the side plate (18), and the bottom of the side plate (18) is fixedly connected to the bottom plate (19).

3. The device for batch leveling and slicing copper strips with lead frames according to claim 2, characterized in that: The bottom four corners of the support platform (1) are fixedly connected to pillars (5), and the bottom of the pillars (5) is fixedly connected to the top of the base plate (19).

4. The device for batch leveling and slicing copper strips with lead frames according to claim 1, characterized in that: A feeding platform (6) is fixedly connected to one side of the support platform (1).

5. The lead frame copper strip batch leveling and slicing device according to claim 2, characterized in that: The top of the support plate (17) is provided with a through groove. The top of the support plate (17) is fixedly connected to a side plate (14). The top of the side plate (14) is fixedly connected to a top plate (13). The bottom of the top plate (13) is fixedly connected to a push rod motor (12). The bottom of the push rod of the push rod motor (12) is fixedly connected to a connecting plate (15). The bottom of the connecting plate (15) is fixedly connected to a slicing blade (16). The slicing blade (16) penetrates the inner wall of the through groove of the sliding connection support plate (17). The slicing blade (16) is located between the first leveling block (3) and the second leveling block (4).

6. The lead frame copper strip batch leveling and slicing device according to claim 5, characterized in that: A controller (20) is fixedly connected to one side of the top of the support plate (17). The controller (20) is electrically connected to the push rod motor (12) and the motor (7) via a transmission line.

7. The device for batch leveling and slicing copper strips with lead frames according to claim 1, characterized in that: The corner of the placement slot of the support platform (1) is set as an arc surface and this corner is located inside the groove (2) on the side away from the leveling block (3).

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