An automatic positioning and rotating sharpening device for wire needles

Abstract

The application discloses a kind of wire needle automatic positioning rotary sharp grinding equipment, including base, the through disc is arranged on the upper end surface of base, the grinding disc is rotationally arranged on the upper side of base behind disc, and the driving roller that is consistent with the edge of disc is embedded in the base in front of disc;The connecting cylinder that passes through the center is fixed below the disc, and the multiple clamping blocks are uniformly distributed in the connecting cylinder;The rotating sleeve of C type is arranged in the left and right sides of disc, and the rotating sleeve is rotatably connected in base;Compared with prior art, the application realizes the high efficiency, precision and standardization of needle tip grinding process by wedge self-centering, composite rotary motion and link angle adjustment three major core designs.

Description

Technical Field

[0001] This invention relates to the field of integrated circuit test component technology, specifically to an automated positioning and rotary grinding device for wire needles. Background Technology

[0002] In the field of integrated circuit manufacturing and testing, probe tips, as the core contact elements of probe cards, play a crucial role in signal transmission during wafer testing. As semiconductor manufacturing processes continue to miniaturize, the chip pin pitch is shrinking, placing extremely stringent requirements on the geometric accuracy, sharpness, elasticity, and wear resistance of probe tips.

[0003] Under current technological conditions, probe manufacturers typically employ the following methods to achieve tip forming:

[0004] The operator uses magnifying equipment to observe and manually grinds the needle on a high-speed rotating oilstone or micro-grinding wheel. While this method can meet the needs of small-batch, multi-variety sample processing to some extent, its disadvantages are obvious: the processing efficiency is extremely low, making it unsuitable for large-scale production; the needle tip geometry is highly dependent on the operator's personal skills, making it difficult to guarantee product consistency; and manual operation is very prone to chipping or micro-cracks at the needle tip edge, affecting the probe's lifespan and the stability of the test signal.

[0005] These devices operate on the principle of rotating the needle by a pressure roller and grinding from the side or below with a grinding wheel. The grinding speed is adjusted via stepless speed control, and some models are equipped with specialized abrasive wheels to improve wear resistance. However, these devices have inherent limitations when dealing with ICT needles: because ICT needles are typically only tens to hundreds of micrometers in diameter and are mostly made of hard and brittle materials such as tungsten steel and rhenium-tungsten, the rolling clamping method easily leads to needle bending or surface damage. Furthermore, the taper adjustment mechanism of these devices is complex, requiring repeated trial grinding during adjustment, making it difficult to achieve precise control over minute angle changes. This results in significant deviations in the needle tip taper, affecting the probe's puncture performance.

[0006] Therefore, it is necessary to provide an automated positioning and rotary grinding device for needles to solve the problems mentioned in the background art. Summary of the Invention

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automated positioning and rotary grinding device for needles, comprising a base, a turntable extending through the upper surface of the base, a grinding disc rotatably disposed above the base and behind the turntable, and a drive roller embedded on the base and in front of the turntable, which fits against the edge of the turntable.

[0008] A connecting cylinder passing through the center of the turntable is fixed below it, and multiple clamping blocks are evenly distributed around the inner circumference of the connecting cylinder.

[0009] Both sides of the turntable are provided with C-shaped rotating sleeves, which are rotatably connected to the base.

[0010] Furthermore, a sliding cylinder is slidably disposed inside the connecting cylinder, and multiple elastically fixed wedges of different sizes are distributed above the sliding cylinder, with gaps between the wedges;

[0011] The side of each wedge that is in contact with the inner wall of the turntable is a slope, and the inner wall of the central hole of the turntable is also a slope.

[0012] Each clamping block corresponds to one of the wedge blocks, and each clamping block is fixed to the inner wall of each wedge block.

[0013] Furthermore, a threaded cylinder is fixed to the lower end of the sliding cylinder, and a clamping nut is rotatably provided at the lower end of the connecting cylinder, the clamping nut being threadedly connected to the threaded cylinder.

[0014] Furthermore, the outer wall of the sliding cylinder has multiple slots, through which the sliding cylinder slides into the inner wall of the connecting cylinder.

[0015] Furthermore, the outer wall of the connecting cylinder is slidably and rotatably fitted with a sliding sleeve;

[0016] The base is threaded with an adjusting screw that passes through its rear end face. A nut is rotatably provided at the end of the adjusting screw. A connecting rod is hinged in the nut, and the other end of the connecting rod is hinged in a sliding sleeve.

[0017] Furthermore, the outer wall of the turntable is arc-shaped, the drive roller is a rubber roller strip that converges towards the center in the vertical direction, and a drive motor is fixedly mounted on the base above the drive roller.

[0018] Furthermore, a slide rail is fixed at the rear of the base, and a slide plate is slidably mounted on the slide rail, with the grinding disc rotatably mounted on the slide plate.

[0019] Furthermore, a grinding motor is fixedly mounted on the skateboard, and the grinding motor is connected to the grinding disc via a belt assembly.

[0020] Furthermore, a lead screw is rotatably mounted in the slide rail, and the lead screw is threadedly connected to the slide plate.

[0021] Furthermore, a pointer is rotatably mounted on the side of the base, and the pointer is fixedly connected to the rotating shaft of the rotating sleeve.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] In this invention, when the equipment is working, the grinding disc rotates at high speed, and at the same time the drive roller drives the turntable to rotate around its own axis. The needle tip is ground on the grinding disc while rotating on its own axis. The grinding force is evenly applied to the entire circumference of the needle tip, which solves the problem of planar or eccentric problems that are easy to occur in unidirectional grinding and ensures that the needle tip is a uniform rotating body.

[0024] In this invention, the outer wall of the turntable is designed to be arc-shaped, and the drive roller is made of constricted rubber roller strips. When the turntable tilts due to the adjustment of the taper, its arc-shaped outer wall can still closely fit the surface of the drive roller, ensuring that the power transmission will not be interrupted no matter what angle the turntable is at. This makes the two actions of workpiece rotation and angle adjustment independent of each other, and realizes stable circumferential grinding at any taper.

[0025] In this invention, clamping, angle adjustment, and grinding disc feed are achieved through clamping nuts, adjusting screws, and pushing screws, respectively. All adjustments are mechanical thread transmissions, which are labor-saving and provide a clear feel, ensuring precise and accurate adjustment. Attached Figure Description

[0026] Figure 1 A schematic diagram of the overall structure of an automated positioning and rotary grinding device for needles;

[0027] Figure 2 This is a schematic diagram of the internal structure of the base in this invention;

[0028] Figure 3 A schematic cross-sectional view of an automated positioning and rotary grinding device for needles;

[0029] Figure 4 A schematic diagram of the internal structure of the turntable and connecting cylinder;

[0030] In the diagram: 1. Base; 2. Turntable; 21. Connecting cylinder; 22. Rotating sleeve; 23. Threaded cylinder; 24. Sliding cylinder; 25. Wedge block; 26. Slot; 3. Grinding disc; 31. Slide plate; 32. Grinding motor; 33. Belt assembly; 4. Clamping block; 5. Sliding sleeve; 6. Clamping nut; 7. Adjusting screw; 71. Connecting rod; 72. Rotary cap; 8. Drive roller; 81. Drive motor; 9. Slide rail; 91. Push screw; 10. Pointer. Detailed Implementation

[0031] Please see Figures 1-4 In this embodiment of the invention, an automated positioning and rotary grinding device for needles includes a base 1, a turntable 2 extending through its upper surface on the base 1, a grinding disc 3 rotatably disposed above the base 1 and behind the turntable 2, and a drive roller 8 embedded on the base 1 and in front of the turntable 2, which is in contact with the edge of the turntable 2.

[0032] A connecting cylinder 21 passing through its center is fixed below the turntable 2, and multiple clamping blocks 4 are evenly distributed around the inner circumference of the connecting cylinder 21;

[0033] Both sides of the turntable 2 are provided with C-shaped rotating sleeves 22, which are rotatably connected to the base 1.

[0034] The needle is clamped in the center of the turntable 2 by the clamping block 4. The needle tip can be polished by rotating the grinding disc 3. The drive roller 8 can drive the turntable 2 to rotate, thereby polishing the needle tip circumferentially. The needle tip is polished on the grinding disc 3 while rotating, which ensures that the grinding force is evenly applied to the entire circumference of the needle tip and prevents flatness or eccentricity. The tilt angle of the turntable 2 can be controlled by adjusting the tilt of the rotating sleeve 22, thereby controlling the taper of the needle tip.

[0035] In this embodiment, a sliding cylinder 24 is slidably disposed inside the connecting cylinder 21, and a plurality of elastically fixed upper and lower wedges 25 are distributed above the sliding cylinder 24, with gaps between the wedges 25.

[0036] The side of each wedge 25 that is in contact with the inner wall of the turntable 2 is an inclined surface, and the inner wall of the center hole of the turntable 2 is also an inclined surface;

[0037] The clamping block 4 corresponds one-to-one with the wedge block 25, and each clamping block 4 is fixed to the inner wall of each wedge block 25.

[0038] In this embodiment, a threaded cylinder 23 is fixed at the lower end of the sliding cylinder 24, and a clamping nut 6 is rotatably provided at the lower end of the connecting cylinder 21. The clamping nut 6 is threadedly connected to the threaded cylinder 23.

[0039] Rotating the clamping nut 6 causes the sliding cylinder 24 to slide downwards, thereby causing each wedge block 25 to move closer to the center, thus clamping the needle between the clamping blocks 4.

[0040] In this embodiment, the outer wall of the sliding cylinder 24 has multiple slots 26, and the sliding cylinder 24 is slidably embedded into the inner wall of the connecting cylinder 21 through the slots 26.

[0041] The slot 26 can restrict the rotation between the sliding cylinder 24 and the connecting cylinder 21 without affecting their mutual sliding.

[0042] In this embodiment, the outer wall of the connecting cylinder 21 is slidably and rotatably fitted with a sliding sleeve 5;

[0043] The base 1 is threaded with an adjusting screw 7 that passes through its rear end face. The end of the adjusting screw 7 is rotatably provided with a nut 72. A connecting rod 71 is hinged in the nut 72. The other end of the connecting rod 71 is hinged in the sliding sleeve 5.

[0044] In other words, by rotating the adjusting screw 7, the connecting rod 71 can push the connecting cylinder 21 and the turntable 2 to tilt, thereby precisely adjusting the taper of the needle tip.

[0045] In this embodiment, the outer wall of the turntable 2 is arc-shaped, the drive roller 8 is a rubber roller strip that converges towards the center in the vertical direction, and a drive motor 81 fixedly mounted on the base 1 is provided above the drive roller 8.

[0046] In other words, when the turntable 2 is tilted to different angles, its outer wall can fit against the surface of the drive roller 8 to ensure that the drive roller 8 can drive the turntable 2 to rotate.

[0047] In this embodiment, a slide rail 9 is fixed behind the base 1, and a slide plate 31 is slidably disposed on the slide rail 9. The grinding disc 3 is rotatably disposed on the slide plate 31.

[0048] The position of the grinding disc 3 can be changed by sliding the sliding plate 31, thereby ensuring that the grinding disc 3 can fit against the tip of the needle.

[0049] In this embodiment, a grinding motor 32 is fixedly mounted on the slide plate 31, and the grinding motor 32 is connected to the grinding disc 3 via a belt assembly 33.

[0050] The grinding motor 32 can drive the grinding disc 3 to rotate to grind the needle tip.

[0051] In this embodiment, a push screw 91 is rotatably disposed in the slide rail 9, and the push screw 91 is threadedly connected to the slide plate 31.

[0052] Rotating the lead screw 91 can drive the slide plate 31 to slide, thereby controlling the feed amount of the grinding disc 3.

[0053] In this embodiment, a pointer 10 is rotatably mounted on the side of the base 1, and the pointer 10 is fixedly connected to the rotating shaft of the rotating sleeve 22.

[0054] The pointer 10 is surrounded by markings, and the tilt angle of the turntable can be determined by the position of the pointer 10.

[0055] In practice, the needle to be polished is vertically inserted into the connecting cylinder 21 at the center of the turntable 2, so that it passes between multiple clamping blocks 4. The clamping nut 6 located below the turntable 2 is rotated. When the clamping nut 6 rotates, it will drive the threaded cylinder 23 connected to it to move downward, thereby driving the sliding cylinder 24 to slide downward along the groove 26 on the inner wall of the connecting cylinder 21. When the sliding cylinder 24 moves downward, the inclined surface on the back of the wedge 25 above it interacts with the inclined surface of the center hole of the turntable 2, forcing multiple elastically fixed upper and lower wedges 25 to retract towards the center. The clamping block 4 fixed on the inner wall of the wedge 25 then clamps the needle, completing the centering and positioning.

[0056] Rotate the adjusting screw 7 located on the back of the base 1. The adjusting screw 7 pushes the rotating cap 72, and the rotating cap 72 drives the connecting rod 71 to move. The other end of the connecting rod 71 is hinged to the sliding sleeve 5, and the sliding sleeve 5 is fitted on the outer wall of the connecting cylinder 21. As the screw 7 is pushed forward, the connecting rod 71 pushes and pulls the connecting cylinder 21 through the sliding sleeve 5, causing the turntable 2 to tilt around the axis of the rotating sleeves 22 on both sides. Observe the pointer 10 on the side of the base 1. Since the pointer 10 is fixedly connected to the rotating shaft of the rotating sleeve 22, the scale value it points to is the tilt angle of the current turntable 2 (i.e., the needle), thereby accurately controlling the taper of the needle tip.

[0057] The push screw 91 in the rotating slide rail 9 drives the slide plate 31 to slide forward along the slide rail 9, so that the grinding disc 3 gradually approaches and slightly contacts the needle tip of the needle, and the grinding motor 32 is started, which drives the grinding disc 3 to rotate at high speed through the belt assembly 33, in preparation for grinding the needle tip.

[0058] Start the drive motor 81 to drive the drive roller 8 to rotate. Since the outer wall of the turntable 2 is arc-shaped and the drive roller 8 is a constricted rubber roller strip, no matter what angle the turntable 2 is tilted to in the second step, its outer wall can be closely attached to the surface of the drive roller 8. The drive roller 8 drives the turntable 2 to rotate around its own central axis by friction. While the grinding disc 3 is rotating and grinding, it is also rotating at high speed. This compound motion ensures that the grinding force is evenly applied to the entire circumference of the needle tip, preventing the grinding of a flat surface or the generation of eccentricity.

[0059] During the grinding process, the lead screw 91 can be finely adjusted to control the feed of the grinding disc 3, and the needle tip can be gradually ground to the required size and sharpness. After grinding is completed, the grinding motor 32 and the drive motor 81 are turned off in sequence, the clamping nut 6 is rotated in the opposite direction, the sliding cylinder 24 is moved up, the wedge 25 rebounds and opens under its own elasticity, the clamping block 4 is released, and finally the processed needle is taken out.

[0060] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automated positioning and rotary grinding device for needles, comprising a base (1), characterized in that, A turntable (2) is provided on the base (1) through its upper end surface. A grinding disc (3) is rotatably provided above the base (1) and behind the turntable (2). A drive roller (8) is embedded on the base (1) and in front of the turntable (2) and fits against the edge of the turntable (2). Below the turntable (2) is a connecting cylinder (21) that runs through its center, and multiple clamping blocks (4) are evenly distributed around the inner circumference of the connecting cylinder (21). C-shaped rotating sleeves (22) are provided on both the left and right sides of the turntable (2), and the rotating sleeves (22) are rotatably connected to the base (1); A sliding cylinder (24) is slidably disposed inside the connecting cylinder (21). Above the sliding cylinder (24) are multiple elastically fixed upper and lower wedges (25), and there is a gap between the wedges (25). The side of each wedge (25) that is in contact with the inner wall of the turntable (2) is an inclined surface, and the inner wall of the center hole of the turntable (2) is also an inclined surface; The clamping blocks (4) correspond one-to-one with the wedge blocks (25), and each clamping block (4) is fixed to the inner wall of each wedge block (25); The outer wall of the connecting cylinder (21) is slidably and rotatably fitted with a sliding sleeve (5); The base (1) is threaded with an adjusting screw (7) that passes through its rear end face. The end of the adjusting screw (7) is rotatably provided with a nut (72). A connecting rod (71) is hinged in the nut (72). The other end of the connecting rod (71) is hinged in the sliding sleeve (5). The outer wall of the turntable (2) is arc-shaped, and the drive roller (8) is a rubber roller strip that converges towards the middle in the vertical direction. A drive motor (81) is fixedly mounted on the base (1) above the drive roller (8).

2. The automated positioning and rotary grinding device for needles according to claim 1, characterized in that, The lower end of the sliding cylinder (24) is fixed with a threaded cylinder (23), and the lower end of the connecting cylinder (21) is rotatably provided with a clamping nut (6), which is threadedly connected to the threaded cylinder (23).

3. The automated positioning and rotary grinding device for needles according to claim 1, characterized in that, The outer wall of the sliding cylinder (24) has multiple slots (26), and the sliding cylinder (24) slides into the inner wall of the connecting cylinder (21) through the slots (26).

4. The automated positioning and rotary grinding device for needles according to claim 1, characterized in that, A slide rail (9) is fixed behind the base (1), and a slide plate (31) is slidably mounted on the slide rail (9). The grinding disc (3) is rotatably mounted on the slide plate (31).

5. The automated positioning and rotary grinding device for needles according to claim 4, characterized in that, A grinding motor (32) is fixedly mounted on the slide plate (31), and the grinding motor (32) is connected to the grinding disc (3) via a belt assembly (33).

6. The automated positioning and rotary grinding device for needles according to claim 4, characterized in that, A push screw (91) is rotatably provided in the slide rail (9), and the push screw (91) is threadedly connected to the slide plate (31).

7. The automated positioning and rotary grinding device for needles according to claim 1, characterized in that, The base (1) has a pointer (10) rotatably mounted on its side, and the pointer (10) is fixedly connected to the shaft of the rotating sleeve (22).

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