Fixture for shaping pins of integrated circuit chip

Abstract

The invention belongs to the technical field of chip processing, and discloses an integrated circuit chip pin shaping clamp which comprises a base, an air cylinder is fixed to the top end of the base, a workbench is fixed to the top end of the air cylinder, a positioning mechanism is installed at the top end of the workbench, and a shaping mechanism is arranged at one end of the positioning mechanism. Through cooperation of structures such as a positioning groove, a first positioning block and a first reset spring, the integrated circuit chip clamping device can achieve rapid positioning and stable clamping of an integrated circuit chip and is adaptive to chips of different specifications, the positioning groove is obliquely formed by 45 degrees, and when the first positioning block and a second positioning block are pulled open, the clamping efficiency is greatly improved. The first reset spring accumulates force, the hand is loosened after the chip is placed in, the first reset spring pulls the two sets of positioning blocks and the positioning box to be close to each other, preliminary positioning is completed from the two sides of the chip, the first screw is rotated to drive the limiting disc to move downwards, the top of the chip is pressed, double fixing of side clamping and top pressing is formed, and the chip is prevented from deviating in the shaping process.

Description

Technical Field

[0001] This invention belongs to the field of chip processing technology, specifically a fixture for shaping the pins of integrated circuit chips. Background Technology

[0002] Against the backdrop of the rapid development of the integrated circuit industry, chip packaging technology is constantly iterating, from traditional DIP and SOP to high-precision QFP and BGA. The number of chip pins is continuously increasing, and the spacing is constantly decreasing, placing increasingly stringent requirements on the flatness, coplanarity, and positional accuracy of the pins. As the core interface connecting the chip to external circuits, the shape and accuracy of the pins directly determine the electrical performance and reliability of the chip after soldering. If the pins have defects such as bending, misalignment, or height differences, it may lead to poor soldering and signal transmission loss, or even short circuits and chip failure. Therefore, in the process after chip packaging and before soldering, pin shaping is a critical step to ensure chip quality.

[0003] Publication number CN221226205U discloses a pin shaping fixture for SOP-packaged integrated circuits. This fixture allows workers to quickly clamp and fix integrated circuit pins of different sizes without changing the fixture, thus improving the efficiency and effectiveness of pin shaping and enhancing its practicality. The fixture includes a worktable, a fixed plate, a mounting bracket, a threaded cylinder, a first screw, two sets of first sliders, a connecting block, a clamping plate, a spring-loaded assembly, and a shaping mechanism. A fixed plate is located on the top of the worktable, and a mounting bracket is located at the front end of the top of the fixed plate. The mounting bracket has a pre-drilled hole on its top, and a threaded cylinder is installed in the pre-drilled hole. The first screw is threadedly connected to the threaded cylinder, and the connecting block has a groove on its top.

[0004] This device can quickly clamp and fix the chip without changing the clamp, thus improving the efficiency and effectiveness of shaping integrated circuit pins. However, it still cannot position the chip directly for limiting clamping. Therefore, a clamp for shaping integrated circuit chip pins is proposed, which can position and fix the chip and ensure the efficiency of shaping the pins. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides a fixture for shaping the pins of integrated circuit chips.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fixture for shaping the pins of an integrated circuit chip, comprising a base, a cylinder fixed to the top of the base, a worktable fixed to the top of the cylinder, a positioning mechanism installed at the top of the worktable, a shaping mechanism provided at one end of the positioning mechanism, and an auxiliary limiting mechanism movably connected inside the worktable; The positioning mechanism includes a positioning groove, a first positioning block, and a first return spring. The positioning groove is fixed inside the worktable. The first positioning block is movably connected inside the positioning groove. The first return spring is movably connected inside the first positioning block. A second positioning block is fixed outside the first return spring. A positioning box is fixed at the top of the first positioning block. The shaping mechanism includes a limiting box, a nut, and a second screw. The limiting box is fixed to the outside of the positioning box. The top of the limiting box is rotatably connected to the nut, and the bottom of the nut is fixed to the second screw.

[0007] Preferably, the positioning box is internally threaded with a first screw, the bottom end of the first screw is fixed with a limit plate, the positioning groove is fixed at 45° inside the worktable, and the outer wall of the first positioning block fits against the inner wall of the positioning groove.

[0008] Preferably, the first return spring is used to pull the first positioning block and the second positioning block and keep them moving towards the central axis of the positioning groove. The first positioning block and the second positioning block are symmetrically distributed about the central axis of the first return spring.

[0009] Preferably, the second screw is externally threaded with a shaping rod, the shaping rod having a shaping groove on its outer side, and two sets of limiting boxes are provided, the limiting boxes being symmetrically distributed about the central axis of the positioning box.

[0010] Preferably, the outer wall of the shaping rod is fitted to the inner wall of the limiting box, and several sets of shaping grooves are provided, which are arranged at equal intervals about the central axis of the shaping rod.

[0011] Preferably, the auxiliary limiting mechanism includes a limiting cylinder, a suction cup, and a piston. The limiting cylinder is movably connected inside the worktable, the top of the limiting cylinder is fixed with a suction cup, the piston is movably connected inside the limiting cylinder, and a pull rope is fixed outside the piston.

[0012] Preferably, two sets of limiting cylinders are provided, and the limiting cylinders are symmetrically distributed about the central axis of the worktable, with the outer wall of the piston fitting against the inner wall of the limiting cylinder.

[0013] Preferably, a second return spring is fixed inside the workbench, a pull rod is fixed outside the second return spring, and a pull head is fixed outside the pull rod.

[0014] Preferably, the second return spring, pull rod, and pull head are provided in two sets, and the second return spring, pull rod, and pull head are symmetrically distributed about the central axis of the worktable. The second return spring is used to pull the pull rod and keep it moving towards the center of the worktable.

[0015] Preferably, the base is "X" shaped, and four sets of cylinders are provided, with the cylinders symmetrically distributed about the central axis of the base.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the combination of a positioning groove, a first positioning block, and a first reset spring, enables the device to achieve rapid positioning and stable clamping of integrated circuit chips, adapting to chips of different specifications. The positioning groove is set at a 45° angle. When the first positioning block and the second positioning block are pulled apart, the first reset spring stores force. After the chip is placed in, the device is released, and the first reset spring pulls the two sets of positioning blocks and the positioning box together, completing the initial positioning from both sides of the chip. Rotating the first screw drives the limiting plate to move down, pressing the top of the chip, forming a double fixation of "side clamping + top pressing" to prevent the chip from shifting during shaping.

[0017] This invention, through the combination of a limiting box, a nut, and a second screw, enables the device to precisely shape chip pins, ensuring pin shape consistency. Two sets of limiting boxes are symmetrically distributed on both sides of the positioning box. Rotating the nut drives the second screw to rotate, causing the shaping rod to move smoothly downward along the inner wall of the limiting box. The shaping grooves evenly spaced on the outside of the shaping rod can accommodate pins with different spacings. During the downward movement, the pins are squeezed into the preset shape, avoiding pin bending and displacement, thus improving shaping accuracy and efficiency.

[0018] This invention, through the combination of a limiting cylinder, a suction cup, and a piston, enables the device to assist in limiting the bottom of the chip, further enhancing clamping stability. Pulling the piston creates negative pressure inside the limiting cylinder, the suction cup adheres to the bottom edge of the chip, and the pull rope is wrapped around the pull rod. The pull force of the second reset spring fixes the piston position and maintains the negative pressure state. This double limiting prevents the chip from moving up and down during the shaping process, ensuring the positional accuracy of the pins during shaping. It is especially suitable for thin or easily deformable chips. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall right-side structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged cross-sectional view of point A in the middle section; Figure 4 This is a schematic diagram of the positioning mechanism structure of the present invention; Figure 5This is a schematic cross-sectional view of the device structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged cross-sectional view of section B in the middle section; Figure 7 For the present invention Figure 5 Enlarged cross-sectional view of section C.

[0020] In the diagram: 1. Base; 2. Cylinder; 3. Worktable; 4. Positioning mechanism; 401. Positioning groove; 402. First positioning block; 403. First return spring; 404. Second positioning block; 405. Positioning box; 406. First screw; 407. Limiting plate; 5. Shaping mechanism; 501. Limiting box; 502. Nut; 503. Second screw; 504. Shaping rod; 505. Shaping groove; 6. Auxiliary limiting mechanism; 601. Limiting cylinder; 602. Suction cup; 603. Piston; 604. Pull rope; 605. Second return spring; 606. Pull rod; 607. Pull head. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1 to 7 As shown, the present invention provides a fixture for shaping the pins of an integrated circuit chip, including a base 1, a cylinder 2 fixed to the top of the base 1, a worktable 3 fixed to the top of the cylinder 2, a positioning mechanism 4 installed on the top of the worktable 3, a shaping mechanism 5 provided at one end of the positioning mechanism 4, and an auxiliary limiting mechanism 6 movably connected inside the worktable 3. The base 1 is "X" shaped, and four sets of cylinders 2 are provided, which are symmetrically distributed about the central axis of the base 1.

[0023] The above solution involves raising and lowering the entire device by starting cylinder 2, thus adapting to the height of different users.

[0024] like Figures 1 to 5As shown, the positioning mechanism 4 includes a positioning groove 401, a first positioning block 402, and a first return spring 403. The positioning groove 401 is fixed inside the worktable 3. The first positioning block 402 is movably connected inside the positioning groove 401. The first return spring 403 is movably connected inside the first positioning block 402. A second positioning block 404 is fixed outside the first return spring 403. The first return spring 403 is used to pull the first positioning block 402 and the second positioning block 404 and keep them moving towards the central axis of the positioning groove 401. The first positioning block 402 and the second positioning block 404 are symmetrically distributed about the central axis of the first return spring 403.

[0025] like Figures 1 to 5 As shown, a positioning box 405 is fixed to the top of the first positioning block 402, and a first screw 406 is threadedly connected to the inside of the positioning box 405. A limit plate 407 is fixed to the bottom of the first screw 406. The positioning groove 401 is fixed at 45° inside the worktable 3, and the outer wall of the first positioning block 402 fits against the inner wall of the positioning groove 401.

[0026] Using the above scheme: by pulling open the first positioning block 402 and the second positioning block 404, the two sets of positioning boxes 405 are pulled open. After placing the chip into the two sets of positioning boxes 405, the release is made. At this time, the restoring force of the first reset spring 403 can tighten the positioning box 405, thereby positioning the chip through the two sets of positioning boxes 405. Then, rotating the first screw 406 drives the limiting plate 407 to move down, thereby fixing the top of the chip.

[0027] like Figures 1 to 5 As shown, the shaping mechanism 5 includes a limiting box 501, a nut 502, and a second screw 503. The limiting box 501 is fixed to the outside of the positioning box 405. The top of the limiting box 501 is rotatably connected to the nut 502, and the bottom of the nut 502 is fixed to the second screw 503. The second screw 503 is threadedly connected to the outside of the second screw 503. The outside of the shaping rod 504 is provided with a shaping groove 505. Two sets of limiting boxes 501 are provided, and the limiting boxes 501 are symmetrically distributed about the central axis of the positioning box 405. The outer wall of the shaping rod 504 is attached to the inner wall of the limiting box 501. Several sets of shaping grooves 505 are provided, and the shaping grooves 505 are arranged at equal intervals about the central axis of the shaping rod 504.

[0028] The above solution is adopted as follows: After the chip is fixed, the rotating nut 502 drives the second screw 503 to rotate, which in turn drives the shaping rod 504 to move down, so that the moving shaping rod 504 squeezes the pin, which facilitates the shaping of the chip, and the shaping groove 505 can make the pin shaping more convenient.

[0029] like Figures 1 to 7As shown, the auxiliary limiting mechanism 6 includes a limiting cylinder 601, a suction cup 602, and a piston 603. The limiting cylinder 601 is movably connected inside the worktable 3. The suction cup 602 is fixed to the top of the limiting cylinder 601. The piston 603 is movably connected inside the limiting cylinder 601. A pull rope 604 is fixed to the outside of the piston 603. Two sets of limiting cylinders 601 are provided, and the limiting cylinders 601 are symmetrically distributed about the central axis of the worktable 3. The outer wall of the piston 603 is in contact with the inner wall of the limiting cylinder 601. A second return spring 605 is fixed inside the worktable 3. A pull rod 606 is fixed outside the second return spring 605. A pull head 607 is fixed outside the pull rod 606. There are two sets of the second return spring 605, pull rod 606 and pull head 607. The second return spring 605, pull rod 606 and pull head 607 are symmetrically distributed about the central axis of the worktable 3. The second return spring 605 is used to pull the pull rod 606 and keep it moving towards the center of the worktable 3.

[0030] The above solution is adopted as follows: After fixing the top of the chip, the piston 603 is pulled to move to the edge of the bottom of the chip, and the suction cup 602 contacts the chip. At this time, the pull rope 604 is pulled to move the piston 603, thereby drawing pressure inside the limiting cylinder 601. The bottom of the chip is limited and adsorbed by the suction cup 602 and the negative pressure. The pull rod 606 is pulled out by the pull head 607. The pulled rope 604 is wrapped around the limiting cylinder 601 and the pull rod 606, thereby stabilizing the negative pressure inside the limiting cylinder 601.

[0031] The working principle and usage process of this invention are as follows: First, the device is raised and lowered by starting cylinder 2 to accommodate different user heights. Then, the first positioning block 402 and the second positioning block 404 are pulled open, thereby opening the two sets of positioning boxes 405. After placing the chip into the two sets of positioning boxes 405, the cylinder is released. At this time, the restoring force of the first reset spring 403 tightens the positioning boxes 405, thus positioning the chip through the two sets of positioning boxes 405. Then, rotating the first screw 406 moves the limiting plate 407 downwards, thereby positioning the chip... Once the top of the chip is fixed, the piston 603 is moved to the edge of the bottom of the chip, and the suction cup 602 contacts the chip. At this time, the pull rope 604 is pulled to move the piston 603, thereby drawing pressure inside the limiting cylinder 601. The bottom of the chip is limited and adsorbed by the suction cup 602 and the negative pressure. The pull rod 606 is pulled out by the pull head 607, and the pulled rope 604 is wrapped around the limiting cylinder 601 and the pull rod 606, thereby stabilizing the negative pressure inside the limiting cylinder 601.

[0032] Finally, after the chip is fixed, the rotating nut 502 drives the second screw 503 to rotate, which in turn drives the shaping rod 504 to move down, so that the moving shaping rod 504 squeezes the pins, which facilitates the shaping of the chip, and the shaping groove 505 makes it easier to shape the pins.

[0033] When the shaping rod 504 moves down along the inner wall of the limiting box 501 to press the pin, fine adjustments can be made by observing the contact state between the pin and the shaping groove 505. If it is found that some pins are not fully embedded in the shaping groove 505, the downward movement can be paused, and the nut 502 can be slightly rotated to make the second screw 503 drive the shaping rod 504 to rotate slightly. The guiding effect of the shaping groove 505 is used to correct the pin to the correct position. Then, the nut 502 is slowly rotated to ensure that the shaping rod 504 moves down at a uniform speed, avoiding excessive deformation or incomplete shaping of the pin due to uneven pressure. At the same time, since the positioning groove 401 is set at a 45° angle, the first positioning block 402 and the second positioning block 404 are always in contact with the inner wall of the positioning groove 401 under the pulling force of the first reset spring 403, which can counteract the lateral force generated during the shaping process, prevent the chip from shifting to the side, and further ensure the shaping accuracy.

[0034] After the pin shaping is completed, firstly, rotate the nut 502 in the opposite direction to move the second screw 503 and the shaping rod 504 upwards until the shaping rod 504 is completely detached from the chip pins, preventing the pins from rubbing against the shaping groove 505 when removing the chip. Next, pull the pull head 607 to move the pull rod 606 outwards against the tension of the second reset spring 605, unwrap the pull rope 604 wrapped around the limiting cylinder 601 and the pull rod 606, push the piston 603 into the limiting cylinder 601, release the negative pressure in the limiting cylinder 601, and detach the suction cup 602 from the bottom of the chip. Then, rotate the first screw 406 in the opposite direction to move the limiting plate 407 upwards, relieving the pressure on the top of the chip. Finally, pull the first positioning block 402 and the second positioning block 404 outwards to detach the two sets of positioning boxes 405 from the sides of the chip, and the shaped chip can be easily removed.

[0035] When handling thin or easily deformable chips, the rotation force of the first screw 406 must be controlled during the top fixing operation to avoid excessive pressure on the chip top by the limiting plate 407, which could damage the chip. A soft silicone pad can be attached to the bottom of the limiting plate 407 to increase the contact area between the limiting plate 407 and the chip, disperse pressure, and increase friction to further prevent chip slippage. During the auxiliary limiting stage, the moving distance of the piston 603 can be appropriately increased to enhance the negative pressure intensity in the limiting cylinder 601, allowing the suction cup 602 to more firmly adhere to the bottom of the chip. Combined with the dual fixing structure of "side clamp + top pressure", a triple limiting protection is formed, effectively preventing the thin chip from bending or shifting during the shaping process and ensuring the smooth progress of the shaping work. If the chip pins are severely bent or deformed, the shaping operation can be performed in multiple stages. During each shaping, the downward movement of the shaping rod 504 can be controlled to gradually correct the pins to the preset shape, avoiding excessive external force applied at once that could cause the pins to break.

[0036] 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.

[0037] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixture for shaping the pins of an integrated circuit chip, comprising a base (1), characterized in that: A cylinder (2) is fixed to the top of the base (1), a worktable (3) is fixed to the top of the cylinder (2), a positioning mechanism (4) is installed on the top of the worktable (3), a shaping mechanism (5) is provided at one end of the positioning mechanism (4), and an auxiliary limiting mechanism (6) is movably connected inside the worktable (3). The positioning mechanism (4) includes a positioning groove (401), a first positioning block (402) and a first return spring (403). The positioning groove (401) is fixed inside the worktable (3). The first positioning block (402) is movably connected inside the positioning groove (401). The first return spring (403) is movably connected inside the first positioning block (402). A second positioning block (404) is fixed outside the first return spring (403). A positioning box (405) is fixed at the top of the first positioning block (402). The shaping mechanism (5) includes a limiting box (501), a nut (502), and a second screw (503). The limiting box (501) is fixed to the outside of the positioning box (405). The top of the limiting box (501) is rotatably connected to the nut (502), and the bottom of the nut (502) is fixed to the second screw (503).

2. The integrated circuit chip pin shaping fixture according to claim 1, characterized in that: The positioning box (405) is internally threaded with a first screw (406), and a limit plate (407) is fixed at the bottom end of the first screw (406). The positioning groove (401) is fixed at 45° inside the workbench (3), and the outer wall of the first positioning block (402) fits against the inner wall of the positioning groove (401).

3. The integrated circuit chip pin shaping fixture according to claim 1, characterized in that: The first reset spring (403) is used to pull the first positioning block (402) and the second positioning block (404) and keep them moving towards the central axis of the positioning groove (401). The first positioning block (402) and the second positioning block (404) are symmetrically distributed about the central axis of the first reset spring (403).

4. The integrated circuit chip pin shaping fixture according to claim 1, characterized in that: The second screw (503) is externally threaded with a shaping rod (504), and the shaping rod (504) has a shaping groove (505) on its outside. The limiting box (501) is provided in two sets, and the limiting box (501) is symmetrically distributed about the central axis of the positioning box (405).

5. The integrated circuit chip pin shaping fixture according to claim 4, characterized in that: The outer wall of the shaping rod (504) is attached to the inner wall of the limiting box (501), and several sets of shaping grooves (505) are provided. The shaping grooves (505) are arranged at equal intervals about the central axis of the shaping rod (504).

6. The integrated circuit chip pin shaping fixture according to claim 1, characterized in that: The auxiliary limiting mechanism (6) includes a limiting cylinder (601), a suction cup (602) and a piston (603). The limiting cylinder (601) is movably connected inside the worktable (3). The suction cup (602) is fixed at the top of the limiting cylinder (601). The piston (603) is movably connected inside the limiting cylinder (601). A pull rope (604) is fixed outside the piston (603).

7. The integrated circuit chip pin shaping fixture according to claim 6, characterized in that: Two sets of limiting cylinders (601) are provided. The limiting cylinders (601) are symmetrically distributed about the central axis of the worktable (3). The outer wall of the piston (603) is attached to the inner wall of the limiting cylinder (601).

8. The integrated circuit chip pin shaping fixture according to claim 6, characterized in that: The workbench (3) is internally fixed with a second return spring (605), and externally fixed with a pull rod (606). Externally fixed with a pull head (607) is the pull rod (606).

9. The integrated circuit chip pin shaping fixture according to claim 8, characterized in that: The second return spring (605), pull rod (606) and pull head (607) are provided in two sets. The second return spring (605), pull rod (606) and pull head (607) are symmetrically distributed about the central axis of the worktable (3). The second return spring (605) is used to pull the pull rod (606) and keep it moving towards the center of the worktable (3).

10. The integrated circuit chip pin shaping fixture according to claim 1, characterized in that: The base (1) is "X" shaped, and there are four sets of cylinders (2). The cylinders (2) are symmetrically distributed about the central axis of the base (1).

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