Chip carrier surface grinding device
The mounting cylinder design, which combines a rotary motor and a drive motor, enables automated and uniform grinding of the chip carrier surface, solving the contact resistance problem caused by uneven carrier surface and improving detection results and work efficiency.
Patent Information
- Application Number
- CN202423144431.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Existing chip carriers suffer from uneven surfaces due to wear and impacts during use, affecting the contact resistance and conductivity between the chip and the carrier, which in turn affects the detection results. Manual grinding is time-consuming, labor-intensive, and difficult to control the grinding force evenly.
A grinding device for chip carrier surface was designed. It uses a mounting cylinder with a combination of rotary motor and drive motor for dual motion, and is equipped with a clamping mechanism and central control unit to realize automated control and flexible adjustment, ensuring uniform grinding of carrier surface.
It improves grinding efficiency and precision, reduces manual labor intensity, adapts to carriers of different sizes and shapes, ensures flat carrier contact surfaces, and enhances the accuracy and efficiency of testing.
Smart Images
Figure CN223834131U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chip testing technology, specifically to a grinding device for the surface of a chip carrier. Background Technology
[0002] Scanning electron microscopy (SEM) testing of chips involves observing the morphology of the chip surface, deeply observing the internal structure of the chip, elemental analysis, locating and analyzing the failure points of the chip, and observing the microstructure and compositional changes of the failure area. All of these require the chip to have high conductivity to ensure the accuracy and effectiveness of the test.
[0003] In the aforementioned tests, the chips must be placed on a conductive carrier for subsequent testing. However, during daily use, the carriers often develop irregular surfaces due to wear and tear. This prevents the chip surface from fully adhering to the carrier surface, resulting in lower contact resistance during testing. This further affects the efficiency of electron transfer. As conductivity is compromised, the testing performance of the chip is reduced, and the conductivity between the chip and the carrier is also affected. To address this issue, before placing the chip on the carrier, workers typically polish the carrier's contact surface with sandpaper to make it smooth and increase the adhesion between the carrier and the chip. However, manual polishing is time-consuming and labor-intensive, and it is difficult to evenly control the polishing pressure, resulting in unevenness in some areas of the carrier's contact surface even after polishing. Utility Model Content
[0004] The purpose of this invention is to provide a grinding device for the surface of a chip carrier, so as to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a grinding device for the surface of a chip carrier, comprising a platform for holding the carrier, a lifting mechanism fixedly installed at the rear of the top of the platform, and a connecting bracket fixedly connected to the top of the lifting mechanism. A rotary motor is installed at the top of the connecting bracket, the actuating end of the rotary motor passes through the connecting bracket and is driven by a shaped bracket. A drive motor is fixedly installed on the lower part of the side wall of the shaped bracket away from the rotary motor. The actuating end of the drive motor passes through the shaped bracket and is driven by a mounting cylinder for mounting sandpaper.
[0006] Furthermore, the mounting cylinder includes a mounting base and a cylinder body for transmission connection with the actuator end of the drive motor. A clamping opening is radially formed on the outer wall of the cylinder body. Two clamping strips are integrally and symmetrically arranged inside the cylinder body at the clamping opening. Limiting grooves are provided on the outer walls of the opposite sides of the two clamping strips. The inner walls of the limiting grooves are connected to the inner walls of the cylinder body. A clamping unit is provided inside the cylinder body. The clamping unit includes a connecting strip and clamping pieces integrally and symmetrically arranged on both sides of the connecting strip. The side walls of the clamping pieces near the clamping strips match the outer walls of the clamping strips and are slidably arranged relative to each other. The clamping pieces are flexible.
[0007] Furthermore, the irregular bracket includes a transverse bracket with one end connected to the actuator of the rotary motor and a longitudinal bracket disposed below the transverse bracket. The longitudinal bracket is used to install the drive motor. The top end of the transverse bracket is provided with a first slide rail. The top end of the longitudinal bracket is integrally provided with a first slider whose outer wall is slidably connected to the inner wall of the first slide rail. The top end of the first slider is threadedly connected with a limit bolt.
[0008] Furthermore, a servo motor is installed on the side wall of the platform, and a transverse slide is provided at the top of the platform. A bidirectional lead screw is rotatably connected inside the transverse slide. The actuator end of the servo motor passes through the side wall of the platform and is drivenly connected to one end of the bidirectional lead screw. Two lead seats are symmetrically and threadedly connected to the bidirectional lead screw. The outer wall of the lead seat fits against and is slidably connected to the inner wall of the transverse slide. Two clamping mechanisms are symmetrically provided at the top of the platform, and their bottom ends are fixedly connected to the top ends of the two lead seats respectively. The clamping mechanisms are used to clamp the carrier.
[0009] Furthermore, the clamping mechanism includes a U-shaped frame with the openings of the two U-shaped frames facing each other. Two V-shaped grooves are symmetrically arranged on the inner walls of the upper and lower sides of the opening of the U-shaped frame. Two second slide rails are symmetrically arranged on the inner walls of the U-shaped frames on both sides of the opening of the V-shaped grooves. Two clamping blocks are slidably arranged inside the U-shaped frame. The bottom ends of the two clamping blocks are hinged together. Two second sliders are rotatably connected on the outer walls of the upper and lower sides of the clamping blocks away from the intersection. The outer walls of the second sliders are in contact with and slidably connected to the inner walls of the corresponding second slide rails. A pressure spring is provided in the second slide rail. The two ends of the pressure spring are respectively fixedly connected to the end of the second slider near the hinge and the inner wall of the second slide rail near the hinge.
[0010] Furthermore, a rubber pad is provided on the clamping block near the outer wall of the carrier.
[0011] Furthermore, it also includes a central control unit, which is connected to the lifting mechanism, rotary motor, drive motor and servo motor respectively.
[0012] The beneficial effects achieved by this utility model are as follows:
[0013] By combining a rotary motor and a drive motor, the mounting cylinder can rotate clockwise around the surface of the carrier, while the mounting cylinder itself can also rotate. This dual motion mode greatly increases the grinding efficiency, allowing for quick and effective grinding of the carrier surface. Furthermore, mechanical grinding ensures that the contact surface of the carrier is ground evenly, preventing uneven grinding.
[0014] The irregularly shaped bracket design in the device allows operators to flexibly adjust the position of the mounting cylinder as needed to accommodate vehicles of different sizes and shapes. This flexibility enables the device to handle a wider variety of vehicles, improving its practicality and applicability.
[0015] The clamping mechanism is designed to take into full account the differences in shape and size of the carrier. Through the combination of the bidirectional lead screw and the clamping block, it can stably clamp carriers of different shapes and sizes, which not only ensures the stability of the grinding process, but also avoids uneven grinding or damage caused by carrier movement.
[0016] The design of the mounting sleeve makes changing sandpaper very simple and quick. New sandpaper can be easily inserted and fixed inside the mounting sleeve, which greatly improves work efficiency and reduces waste and pollution when changing sandpaper.
[0017] The entire device is connected to each motor signal through a central control unit, achieving a high degree of automated control, reducing the labor intensity of operators, and improving the precision and consistency of grinding. Attached Figure Description
[0018] Figure 1 This is a front view of a grinding apparatus for a chip carrier surface in one embodiment;
[0019] Figure 2 This is a right view of a grinding apparatus for a chip carrier surface in one embodiment;
[0020] Figure 3 This is a schematic diagram of the mounting cylinder in the embodiment;
[0021] Figure 4 This is a cross-sectional view of the mounting cylinder in the embodiment;
[0022] Figure 5 This is a top view of the left clamping mechanism in the embodiment. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings.
[0024] like Figure 1-2As shown, this utility model discloses a grinding device for the surface of a chip carrier, including: a platform 1 for holding the carrier, a lifting mechanism 2 fixedly installed at the rear top of the platform 1, and a connecting bracket 3 fixedly connected to the top of the lifting mechanism 2. A rotary motor 31 is installed at the top of the connecting bracket 3. The actuating end of the rotary motor 31 passes through the connecting bracket 3 and is connected to a shaped bracket 32. A drive motor 4 is fixedly installed on the lower side wall of the shaped bracket 32 away from the rotary motor 31. The actuating end of the drive motor 4 passes through the shaped bracket 32 and is connected to a mounting cylinder 5 for mounting sandpaper.
[0025] Furthermore, such as Figure 3-4 As shown, the mounting cylinder 5 includes a mounting base 51 for transmission connection with the actuator end of the drive motor 4 and a cylinder body 52. A clamping port 521 is radially opened on the outer wall of the cylinder body 52. Two clamping strips 522 are symmetrically and integrally arranged inside the cylinder body 52 located at the clamping port 521. A limiting groove 523 is provided on the outer wall of the opposite side of the two clamping strips 522. The inner wall of the limiting groove 523 communicates with the inner wall of the cylinder body 52. A clamping unit 53 for clamping and fixing the two ends of the new sandpaper is provided inside the cylinder body 52. The clamping unit 53 includes a connecting strip 531 and clamping pieces 532 that are symmetrically and integrally arranged on both sides of the connecting strip 531. The side wall of the clamping piece 532 near the clamping strip 522 matches the outer wall of the clamping strip 522 and is slidably arranged relative to it. The clamping piece 532 is flexible.
[0026] Furthermore, such as Figure 1-2 As shown, the irregular bracket 32 includes a transverse bracket 321 with one end connected to the actuator of the rotary motor 31 and a longitudinal bracket 322 disposed below the transverse bracket 321. The longitudinal bracket 322 is used to install the drive motor 4. The top end of the transverse bracket 321 is provided with a first slide rail 3211. The top end of the longitudinal bracket 322 is integrally provided with a first slider 3221 whose outer wall is slidably connected to the inner wall of the first slide rail 3211. The top end of the first slider 3221 is threadedly connected with a limit bolt 33. The bottom end of the bolt head of the limit bolt 33 is slidably disposed between the top end of the transverse bracket 321 and the top end of the longitudinal bracket 322 is slidably disposed between the bottom end of the transverse bracket 321.
[0027] Furthermore, such as Figure 1-2 As shown, a servo motor 6 is installed on the side wall of platform 1, and a transverse slide rail 11 is provided at the top of platform 1. A bidirectional lead screw 12 is rotatably connected inside the transverse slide rail 11. The execution end of the servo motor 6 passes through the side wall of platform 1 and is connected to one end of the bidirectional lead screw 12. Two lead seats 13 are symmetrically and threadedly connected on the bidirectional lead screw 12. The outer wall of the lead seat 13 is in contact with and slidably connected to the inner wall of the transverse slide rail 11. Two clamping mechanisms 7 are symmetrically provided at the top of platform 1, and their bottom ends are fixedly connected to the top ends of the two lead seats 13 respectively. The clamping mechanisms 7 are used to clamp the carrier.
[0028] Furthermore, such as Figure 5 As shown, the clamping mechanism 7 includes a U-shaped frame 71 with its openings facing each other. Two V-shaped grooves 711 are symmetrically arranged on the inner walls of the upper and lower sides of the opening of the U-shaped frame 71. Two second slide rails 712 are symmetrically arranged on the inner walls of the U-shaped frame 71 on both sides of the opening of the V-shaped grooves 711. Two clamping blocks 72 are slidably arranged inside the U-shaped frame 71. The bottom ends of the two clamping blocks 72 are hinged together. Two second sliders 721 are rotatably connected to the outer walls of the upper and lower sides of the clamping blocks 72 away from the hinge. The outer walls of the second sliders 721 are in contact with and slidably connected to the inner walls of the corresponding second slide rails 712. A pressure spring 713 is provided inside the second slide rail 712. The two ends of the pressure spring 713 are fixedly connected to the end of the second slider 721 near the hinge and the inner wall of the second slide rail 712 near the hinge, respectively.
[0029] Furthermore, such as Figure 5 As shown, a rubber pad 73 is provided on the clamping block 72 near the outer wall of the vehicle.
[0030] Furthermore, it also includes a central control unit (not shown in the figure), which is connected to the lifting mechanism 2, the rotary motor 31, the drive motor 4 and the servo motor 6 via signals.
[0031] Based on the above structure, such as Figure 1-5 As shown, during use, the carrier is placed on the platform 1 between the two clamping mechanisms 7. Then, the servo motor 6 is rotated by the central control unit, thereby driving the bidirectional lead screw 12 to rotate. The bidirectional lead screw 12 drives the two lead seats 13 to move to opposite sides through a threaded connection. The lead seats 13 drive the clamping mechanism 7 to move towards the carrier until the hinge of the two clamping blocks 72 abuts against the outer wall of the carrier. After that, the servo motor 6 continues to control the two clamping mechanisms 7 to move towards the carrier through the bidirectional lead screw 12. The carrier generates a reaction force on the hinge of the two clamping blocks 72. The hinge of the two clamping blocks 72 is bent towards the angle of the V-groove 711 on the same side under the force. At the same time, the end of the clamping block 72 away from the V-groove 711 moves towards the carrier with the hinge as the center. The device rotates to adapt to the curvature of the outer wall of the vehicle. Two clamping mechanisms 7 clamp the vehicle. Then, the central control unit controls the execution end of the lifting mechanism 2 to retract. The execution end of the lifting mechanism 2 drives the mounting cylinder 5 to move downward through the connecting bracket 3, the transverse bracket 321 and the longitudinal bracket 322 until the sandpaper on the mounting cylinder 5 abuts against the top of the vehicle. Then, the central control unit starts the rotary motor 31 and the drive motor 4. The execution end of the rotary motor 31 drives the mounting cylinder 5 to rotate clockwise around the vehicle through the transverse bracket 321 and the longitudinal bracket 322. The sandpaper on the mounting cylinder 5 grinds the top of the vehicle. At the same time, the execution end of the drive motor 4 drives the mounting cylinder 5 to rotate. The mounting cylinder 5 drives the sandpaper to rotate, thereby increasing the grinding efficiency.
[0032] During the process of bending at the angle between the hinge of the two clamping blocks 72 and the V-groove 711 on the same side, the second slider 721 moves along the second slide 712 towards the V-groove 711 as the end of the clamping block 72 moves. At the same time, the second slider 721 applies pressure to the pressure spring 713 on the same side, and the pressure spring 713 contracts.
[0033] During the process of releasing the two clamping mechanisms 7 from clamping the carrier, the servo motor 6 drives the bidirectional lead screw 12 to rotate in the opposite direction, and the two lead screw seats 13 drive the two clamping mechanisms 7 to move in the opposite direction. At this time, the pressure spring 713 rebounds, the second slider 721 resets, and the angle at the hinge of the two clamping blocks 72 returns to 180°.
[0034] When the radius of the carrier is greater than the radial length of the mounting cylinder 5, the mounting cylinder 5 cannot grind the entire top of the carrier at once. In this case, it is necessary to adjust the contact surface between the mounting cylinder 5 and the top of the carrier. The operator first loosens the threaded connection between the limiting bolt 33 and the first slider 3221, and then drives the first slider 3221 to slide along the first slide rail 3211 by pushing the bolt head of the limiting bolt 33. The first slider 3221 drives the drive motor 4 and the mounting cylinder 5 to move through the longitudinal bracket 322. After the mounting cylinder 5 moves to the required position, the threaded connection between the limiting bolt 33 and the first slider 3221 is tightened again.
[0035] When it is necessary to replace the sandpaper, pull out the clamping unit 53 inside the cylinder 52, release the clamping unit 53 from the original sandpaper, and pull out the original sandpaper. Then, prepare a new piece of sandpaper with a width equal to the radial length of the cylinder 52. Insert one end of the new sandpaper into the cylinder 52 through the clamping port 521, and let the other end of the new sandpaper go around the cylinder 52. Then, insert the other end of the new sandpaper into the cylinder 52 through the clamping port 521. Then, press the two ends of the new sandpaper in the cylinder 52 so that the two ends of the new sandpaper are respectively attached to the surface of the clamping strip 522, the inner wall of the limiting groove 523, and the inner wall of the cylinder 52. Then, insert the clamping unit 53 and the two clamping strips 522 into the cylinder 52. The clamping piece 532 clamps the two ends of the new sandpaper and the two clamping strips 522, thereby completing the fixation of the new sandpaper.
[0036] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A grinding apparatus for the surface of a chip carrier, characterized in that, include: The platform (1) for holding the vehicle, the lifting mechanism (2) fixedly installed at the rear of the top of the platform (1), and the connecting bracket (3) fixedly connected to the top of the lifting mechanism (2). A rotary motor (31) is installed at the top of the connecting bracket (3). The actuating end of the rotary motor (31) passes through the connecting bracket (3) and is connected to a shaped bracket (32). A drive motor (4) is fixedly installed on the lower side wall of the shaped bracket (32) away from the rotary motor (31). The actuating end of the drive motor (4) passes through the shaped bracket (32) and is connected to a mounting cylinder (5) for installing sandpaper.
2. The grinding apparatus for the surface of a chip carrier according to claim 1, characterized in that: The mounting cylinder (5) includes a mounting base (51) for transmission connection with the actuator end of the drive motor (4) and a cylinder (52). A clamping port (521) is radially opened on the outer wall of the cylinder (52). Two clamping strips (522) are symmetrically and integrally arranged inside the cylinder (52) located at the clamping port (521). A limiting groove (523) is provided on the outer wall of the opposite side of the two clamping strips (522). The inner wall of the limiting groove (523) is connected to the inner wall of the cylinder (52). A clamping unit (53) is provided inside the cylinder (52). The clamping unit (53) includes a connecting strip (531) and clamping pieces (532) symmetrically and integrally arranged on both sides of the connecting strip (531). The side wall of the clamping piece (532) close to the clamping strip (522) matches the outer wall of the clamping strip (522) and is relatively slidably arranged. The clamping piece (532) is flexible.
3. The grinding apparatus for the surface of a chip carrier according to claim 1, characterized in that: The irregular bracket (32) includes a transverse bracket (321) with one end connected to the actuator of the rotary motor (31) and a longitudinal bracket (322) disposed below the transverse bracket (321). The longitudinal bracket (322) is used to install the drive motor (4). The top end of the transverse bracket (321) is provided with a first slide rail (3211). The top end of the longitudinal bracket (322) is integrally provided with a first slider (3221) whose outer wall is slidably connected to the inner wall of the first slide rail (3211). The top end of the first slider (3221) is threaded with a limit bolt (33).
4. The grinding apparatus for the surface of a chip carrier according to claim 1, characterized in that: A servo motor (6) is installed on the side wall of the platform (1). A transverse slide (11) is provided at the top of the platform (1). A bidirectional lead screw (12) is rotatably connected inside the transverse slide (11). The execution end of the servo motor (6) passes through the side wall of the platform (1) and is connected to one end of the bidirectional lead screw (12). Two lead seats (13) are symmetrically and threadedly connected on the bidirectional lead screw (12). The outer wall of the lead seat (13) is in contact with and slidably connected to the inner wall of the transverse slide (11). Two clamping mechanisms (7) are symmetrically provided at the top of the platform (1) and their bottom ends are fixedly connected to the top ends of the two lead seats (13). The clamping mechanisms (7) are used to clamp the carrier.
5. The grinding apparatus for the surface of a chip carrier according to claim 4, characterized in that: The clamping mechanism (7) includes a U-shaped frame (71), with the openings of the two U-shaped frames (71) facing each other. Two V-shaped grooves (711) are symmetrically arranged on the inner walls of the upper and lower sides of the opening of the U-shaped frame (71). Two second slide rails (712) are symmetrically arranged on the inner walls of the U-shaped frames (71) on both sides of the opening of the V-shaped grooves (711). Two clamping blocks (72) are slidably arranged inside the U-shaped frame (71). The bottom ends of the two clamping blocks (72) are hinged to each other. Two second sliders (721) are rotatably connected to the outer walls of the upper and lower sides of the clamping blocks (72) away from the intersection. The outer wall of the second slider (721) is in contact with and slidably connected to the inner wall of the corresponding second slide rail (712). A pressure spring (713) is provided inside the second slide rail (712). The two ends of the pressure spring (713) are fixedly connected to the end of the second slider (721) near the hinge and the inner wall of the second slide rail (712) near the hinge, respectively.
6. The grinding apparatus for the surface of a chip carrier according to claim 5, characterized in that: The clamping block (72) is provided with a rubber pad (73) near the outer wall of the vehicle.
7. The grinding apparatus for the surface of a chip carrier according to claim 5, characterized in that: It also includes a central control unit, which is connected to the lifting mechanism (2), the rotary motor (31), the drive motor (4) and the servo motor (6) respectively.