Miniature part chamfering and polishing tool

Abstract

The application belongs to the field of processing of conduit pumps, and particularly relates to a micro part chamfer polishing tool. The micro part chamfer polishing tool comprises a clamping assembly for clamping a micro part, a posture adjusting unit for driving the clamping assembly to move and / or rotate, a micro part to-be-processed region exposed outside a clamping assembly body, and a chamfer polishing unit arranged above the micro part to-be-processed region. The posture adjusting unit and the chamfer polishing unit cooperate with each other to chamfer and polish the micro part. The application can chamfer and polish the micro part in the conduit pump at high precision, multiple angles and high efficiency, and improve production efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of catheter pump processing, and particularly relates to a micro part chamfer polishing tool. BACKGROUND

[0002] The catheter pump can be used for ventricular assist therapy of various severe heart failure in ICU, and can also be used as a preventive heart function support technology for severe coronary heart disease patients in high-risk coronary stent implantation surgery, to prevent intraoperative hemodynamic instability, reduce perioperative adverse events, and ensure surgical safety. Due to the limitation of the diameter of the blood vessel, the volume of the catheter pump is very small, and the catheter pump is percutaneously inserted into the heart, so the constituent parts on the catheter pump require not only small volume but also high precision, especially the blood flow outlet of the bleeding cage and the blood flow inlet into the bleeding cage.

[0003] After cutting processing, the edges of the blood flow outlet of the bleeding cage and the blood flow inlet into the bleeding cage are often sharp. When blood flows through the edges, the sharp edges not only affect the blood flow, but also may cause serious mechanical hemolysis, which is not allowed for artificial ventricular assist devices. Therefore, chamfer polishing is required for the edges of the blood flow outlet of the bleeding cage and the blood flow inlet into the bleeding cage after cutting processing. Usually, manual chamfering or polishing chamfering tool is used to assist chamfering and polishing.

[0004] However, due to the small volume of the blood flow outlet of the bleeding cage and the blood flow inlet into the bleeding cage, especially the bleeding cage, considering the guidance of blood and the reduction of hemolysis, the chamfer angle of the blood flow outlet is variable and the space at the included angle is small, and the angle is special. The precision of traditional manual chamfering cannot meet the requirements, and the traditional polishing chamfering tool cannot well realize the polishing chamfering of small size and multiple angles, and the production efficiency is low. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a micro part chamfer polishing tool which can perform high-precision, multi-angle and efficient chamfer polishing on micro parts such as bleeding cages.

[0006] To achieve the above purpose, the present application adopts the following technical solutions:

[0007] A micro part chamfer polishing tool, comprising a clamping assembly for clamping a micro part, a posture adjusting unit for driving the clamping assembly to move and / or rotate, and a rack for fixing the clamping assembly and the posture adjusting unit, wherein a to-be-processed region of the micro part is exposed outside the body of the clamping assembly, a chamfer polishing unit is arranged above the to-be-processed region of the micro part, and the posture adjusting unit and the chamfer polishing unit cooperate with each other to perform chamfer polishing on the micro part.

[0008] Preferably, the posture adjusting unit comprises a base plate and a universal index head arranged on the base plate, the universal index head comprises a rotating body clamped in the arc-shaped sliding groove of the base plate and in rotational fit, the rotating body is provided with a main shaft protruding towards the direction of the chamfer polishing unit, the main shaft is in axial limiting and circumferential rotational fit with the rotating body, the front end of the main shaft is provided with the clamping assembly, and the universal index head drives the clamping assembly to rotate circumferentially to any angle.

[0009] Preferably, the rotating body is internally provided with a worm and gear mechanism, wherein the worm gear is coaxially connected with the main shaft, the worm is supported and installed on the rotating body through an eccentric sleeve, one end of the worm protrudes out of the rotating body and is connected with a first hand wheel, and rotating the first hand wheel drives the main shaft to rotate.

[0010] Preferably, the rack comprises a base, horizontal guide columns, a first screw rod and a second hand wheel, the upper surface of the base is provided with two horizontal guide columns and a first screw rod arranged in the horizontal direction, the horizontal guide columns are arranged on both sides of the first screw rod and are parallel to each other; the lower surface of the base plate is fixedly provided with a first sliding block, the first sliding block is slidingly sleeved on the horizontal guide column, and the first sliding block and the horizontal guide column are in circumferential rotational and axial limiting sliding fit; a threaded hole is formed in the middle of the first sliding block and the first screw rod passes through the threaded hole, and the first screw rod and the threaded hole constitute a screw nut mechanism, one end of the first screw rod extends below the chamfer polishing unit, the end of the first screw rod away from the chamfer polishing unit is connected with the second hand wheel, and rotating the second hand wheel drives the first screw rod to rotate circumferentially and drives the posture adjusting unit to move back and forth along the length direction of the horizontal guide column.

[0011] Preferably, the clamping assembly comprises a three-jaw chuck and a split clamping head, the split clamping head is an open split type clamping section with a cylindrical rear section and a conical columnar front section, the three-jaw chuck clamps the rear section of the split clamping head, and the section is provided with a locking screw, and the tightening or loosening of the locking screw provides a radial constraint force to drive the open split type clamping section to deform radially.

[0012] Preferably, the chamfer polishing unit comprises a motor, the rotating shaft of the motor is arranged in the vertical direction and protrudes downward, a thimble is fixed coaxially on the rotating shaft, and the motor drives the thimble to rotate to chamfer and polish the micro parts.

[0013] Preferably, the rack further comprises a support, two vertical guide columns, a second screw rod and a third hand wheel, the front of the support is provided with the two vertical guide columns and the second screw rod arranged in the vertical direction, the vertical guide columns are arranged on both sides of the second screw rod and are parallel to each other; the motor is fixed on the front of the second sliding block, the second sliding block is slidingly sleeved on the vertical guide column, the second sliding block and the vertical guide column form a sliding fit of circumferential rotation and axial limiting, a threaded hole for the second screw rod to pass through is formed in the middle of the second sliding block and the two form a screw nut mechanism, the top end of the second screw rod in the vertical direction is connected with the third hand wheel, and rotating the third hand wheel drives the second screw rod to rotate circumferentially and drives the posture adjusting unit to move up and down along the length direction of the vertical guide column.

[0014] Preferably, the support is vertically fixed on one end of the upper surface of the base along the length direction of the support, the support and the base are L-shaped, the posture adjusting unit is arranged on the upper surface of the base, and the chamfer polishing unit is arranged on the upper half of the front of the support.

[0015] Preferably, the two ends of the horizontal guide column and the vertical guide column are both provided with limiting baffle plates.

[0016] Preferably, the machining precision of the micro part is 0.01 mm.

[0017] The present application has the advantages that:

[0018] (1) The chamfer polishing tool of the present application is integrated, and the height adjustment of the chamfer polishing unit in the vertical direction and the position adjustment of the posture adjusting unit in the horizontal direction can be realized by rotating the third hand wheel and the second hand wheel to drive the screw nut mechanism, thereby improving the precision of chamfer polishing of the micro part such as the bleeding cage and reducing the operation difficulty of the micro part.

[0019] (2) The posture adjusting unit of the present application further comprises a universal index head, which further improves the flexibility and accuracy of the position and angle adjustment of the micro part to be operated, that is, the micro part such as the bleeding cage can be adjusted to the best posture for chamfering and polishing.

[0020] (3) The micro part such as the bleeding cage is driven by the universal index head to rotate around its own axis without changing the other angles, thereby realizing high-precision circumferential chamfering and polishing of the bleeding cage, solving the problem of insufficient chamfering precision caused by the difficulty in controlling the force during circumferential operation in the traditional manual chamfering, overcoming the difficulty that the traditional polishing and chamfering tool cannot well realize small size and multi-angle polishing and chamfering, and making the polishing and chamfering operation more accurate and flexible.

[0021] (4) the three-jaw chuck of the application clamps and fixes the rear section of the split clamping head in a cylindrical shape, and the front section of the split clamping head is a split open clamping section in a conical column shape, the split open clamping section of the front section is composed of a plurality of elastic metal sheets which are completely the same and circumferentially surround, and the part close to the rear section of the elastic metal sheet is provided with a locking screw, the tightening or loosening of the locking screw changes the radial deformation of the split open clamping section, so that the clamping effect of the micro parts such as the bleeding cage is achieved; in addition, the split open clamping section of the front section of the split clamping head applies uniform and small pressure on the micro parts, which avoids the problems of unstable clamping or uneven stress of the parts caused by unstable clamping when the three-jaw chuck directly clamps the small and fragile parts, and greatly improves the production efficiency of high-precision micro parts. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the first kind of axonometric drawing of the application;

[0023] Figure 2 is the second kind of axonometric drawing of the application;

[0024] Figure 3 is the third kind of axonometric drawing of the application;

[0025] Figure 4 is Figure 3 is an enlarged schematic view at C in the middle;

[0026] The actual correspondence between the various labels and component names of the application is as follows:

[0027] 10, clamping assembly; 101, three-jaw chuck; 102, split clamping head;

[0028] 20, attitude adjusting unit; 201, bottom plate; 202, universal indexing head; 2021, rotating body; 2022, main shaft; 2023, first hand wheel; 203, first sliding block;

[0029] 30, chamfer polishing unit; 301, motor; 302, thimble; 303, second sliding block;

[0030] 40, rack; 401, base; 402, support; 403, horizontal guide column; 404, first lead screw; 405, second hand wheel; 406, second lead screw; 407, third hand wheel; 408, plumb guide column;

[0031] A, micro part; DETAILED DESCRIPTION

[0032] The technical features of the technical solutions of the application obtained by equivalent replacement and routine reasoning of those skilled in the art without creative labor fall within the protection scope of the application.

[0033] The overall structure of the present application is shown in Figures 1-4 The specific structure and working manner of the present application will be further described below in combination with a micro part A (e.g. a bleeding cage).

[0034] A micro part chamfer polishing tool, which is composed of a clamping assembly 10, a posture adjusting unit 20, a chamfer polishing unit 30 and a rack 40.

[0035] The rack 40 includes a base 401 arranged horizontally and a support 402 arranged vertically, both of which are solid hexahedrons, the support 402 is fixed vertically at one end of the upper surface of the base 401 along the length direction, and the entire rack 40 is in L shape.

[0036] The rack 40 further includes a second lead screw 406, a third hand wheel 407 and two vertical guide columns 408. The two vertical guide columns 408 are parallel to the second lead screw 406, have the same length direction as the length direction of the support 402, and are arranged on both sides of the second lead screw 406 respectively. The two parallel vertical guide columns 408 are fixedly arranged on the upper half of the front surface of the support 402, and the two ends of each vertical guide column 408 are provided with horizontal limiting baffle plates. The second lead screw 406 is also arranged on the upper half of the front surface of the support 402, and the third hand wheel 407 is fixedly connected with the top end of the second lead screw 406 in the vertical direction, and the second lead screw 406 rotates circumferentially with the rotation of the third hand wheel 407.

[0037] The chamfer polishing unit 30 includes a motor 301, a top pin 302 and a second sliding block 303. The motor 301 is fixedly arranged on the side of the second sliding block 303 away from the support 402, the rotating shaft of the motor 301 is arranged vertically downward, the top pin 302 is coaxially fixed at the lower end of the rotating shaft in the vertical direction, and the motor 301 drives the top pin 302 to rotate to chamfer and polish the micro part A. The two vertical guide columns 408 pass through the guide holes arranged on the second sliding block 303, i.e. the second sliding block 303 is slidingly arranged on the two vertical guide columns 408, constituting a vertical sliding guide cooperation; a threaded hole is arranged in the middle of the second sliding block 303 for the second lead screw 406 to pass through, i.e. the second sliding block 303 and the second lead screw 406 constitute a lead screw nut mechanism for circumferential rotation and axial limiting. The vertical guide column 408 limits the movement of the second sliding block 303 in the vertical direction.

[0038] The third hand wheel 407 is rotated to drive the second screw rod 406 to rotate circumferentially, the second sliding block 303 threadedly matched with the second screw rod 406 moves up and down along the vertical direction, and drives the chamfer polishing unit 30 to move up and down along the length direction of the vertical guide column 408; the horizontal limiting baffle at both ends of the vertical guide column 408 limits the movement stroke of the second sliding block 303. When the chamfer polishing unit 30 is moved to the best operating position in the vertical direction, the motor 301 drives the top pin 302 to rotate to chamfer and polish the micro part A to be processed.

[0039] The rack 40 further comprises a first screw rod 404, a second hand wheel 405 and horizontal guide columns 403. The two horizontal guide columns 403 are parallel to the first screw rod 404, the length directions of the two horizontal guide columns 403 are the same as the length direction of the base 401, and the two horizontal guide columns 403 are arranged on the two sides of the first screw rod 404 respectively. The two horizontal guide columns 403 are fixedly arranged on the one end of the upper surface of the base 401 away from the support 402, and the two ends of the horizontal guide column 403 are provided with vertical limiting baffle plates. The first screw rod 404 is also arranged on the one end of the upper surface of the base 401 away from the support 402, and the one end of the first screw rod 404 close to the chamfer polishing unit 30 extends to the lower side of the chamfer polishing unit 30. The one end of the first screw rod 404 away from the support 402 is fixedly connected with the second hand wheel 405, and the first screw rod 404 rotates circumferentially along with the rotation of the second hand wheel 405.

[0040] The posture adjusting unit 20 comprises a position base plate 201, a universal indexing head 202 and a first sliding block 203. The universal indexing head 202 is fixedly arranged on the upper surface of the base plate 201, and the first sliding block 203 is arranged on the lower surface of the base plate 201. The universal indexing head 202 comprises a rotary body 2021, a main shaft 2022 and a first hand wheel 2023, the rotary body 2021 is clamped in the arc-shaped sliding slot of the base plate 201 and constitutes a rotating fit, a worm and gear mechanism is arranged in the rotary body 2021, the main shaft 2022 protrudes from the rotary body 2021 towards the chamfer polishing unit 30. The worm is supported and installed on the rotary body 2021 through an eccentric sleeve, and one end of the worm protrudes out of the rotary body 2021 and is connected with the first hand wheel 2023, and the main shaft 2022 is driven to rotate by rotating the first hand wheel 2023. The main shaft 2022 and the rotary body 2021 constitute axial limiting and circumferential rotating fit. The main shaft 2022 can rotate within the range of 90° upward and 10° downward in the vertical plane along with the rotary body 2021.

[0041] The front end of the main shaft 2022 is provided with a clamping assembly 10 for fixing the clamped parts, and the universal indexing head 202 drives the clamping assembly 10 to rotate circumferentially to any angle. The clamping assembly 10 comprises a three-jaw chuck 101 and a split clamping head 102. The three-jaw chuck 101 is fixedly arranged at the front end of the main shaft 2022, and the three-jaw chuck 101 clamps and positions the rear segment of the split clamping head 102 by adjusting the radial movement of the movable clamping jaws uniformly arranged on the chuck body. The rear segment of the split clamping head 102 is cylindrical, and the front segment is an open split clamping segment in the shape of a tapered column. The open split clamping segment of the front segment is composed of a plurality of elastic metal sheets that are completely identical and circumferentially arranged. The part of the elastic metal sheet of the front segment of the split clamping head 102 close to the rear segment is provided with a locking screw. The tightening or loosening of the locking screw changes the radial deformation of the open split clamping segment, so that a multi-segment uniform and tiny pressure is applied to the micro part A, which can clamp the micro part A with a small volume without damaging the micro part A.

[0042] The universal indexing head 202 adjusts the micro part A clamped on the clamping assembly 10 to any angle by using the indexing scale ring and the vernier, the positioning pin and the indexing disc, and the exchange gear. Or the circumference where the micro part A is located is divided into any equal parts to complete the multi-directional machining of the micro part A, which belongs to the prior art and will not be described here.

[0043] The lower surface of the bottom plate 201 is fixedly provided with a first sliding block 203, and two horizontal guide columns 403 pass through the guide holes opened on the first sliding block 203, that is, the first sliding block 203 is slidably sleeved on the two horizontal guide columns 403, forming a sliding guide cooperation in the horizontal direction. The middle part of the first sliding block 203 is provided with a threaded hole for the first screw rod 404 to pass through, that is, the first sliding block 203 and the first screw rod 404 form a screw nut mechanism for circumferential rotation and axial limiting. The horizontal guide column 403 limits the first sliding block 203 to move linearly in the horizontal direction parallel to the length direction of the base 401 to approach or away from the chamfer polishing unit 30.

[0044] Rotating the second hand wheel 405 drives the first screw rod 404 to rotate circumferentially, and the first sliding block 203 threaded with the first screw rod 404 moves forward and backward along the length direction of the horizontal guide column 403, and drives the posture adjusting unit 20 to move along the length direction of the horizontal guide column 403; the vertical limiting baffle at both ends of the horizontal guide column 403 limits the movement stroke of the first sliding block 203. After the posture adjusting unit 20 is moved to the best operating position in the horizontal direction, the orientation of the main shaft 2022 of the universal indexing head 202 is adjusted, and after all the adjustments are completed, the chamfer polishing unit 30 is driven to chamfer and polish the micro part A to be machined.

[0045] Rotating the third hand wheel 407, the second screw rod 406 is rotated circumferentially, driving the second sliding block 303 threaded with it to move up and down along the length direction of the plumb guide column 408, the vertical limiting baffle at both ends of the plumb guide column 408 limits the movement stroke of the second sliding block 303. After the second screw rod sliding block mechanism drives the chamfer polishing unit 30 to move up and down in the length direction of the plumb guide column 408 to the best operating position, the motor 301 drives the top pin 302 to rotate to chamfer and polish the micro part A to be processed.

[0046] The horizontal limiting baffle at both ends of the plumb guide column 408 limits the movement stroke of the second sliding block 303. After the chamfer polishing unit 30 moves to the best operating position in the vertical direction, the motor 301 drives the top pin 302 to rotate to chamfer and polish the micro part A to be processed.

[0047] The micro part chamfer polishing tool of the application is integrated. The operator only needs to adjust the rotation of the third hand wheel 407 and the second hand wheel 405 to easily realize the height adjustment of the chamfer polishing unit 30 in the vertical direction and the position adjustment of the posture adjusting unit 20 in the horizontal direction; combined with the universal dividing head 202, the micro part A is rotated upward or downward in the vertical plane with the universal dividing head 202, or the micro part A is rotated around its axis, so that the micro part A to be processed and the top pin 302 are in the best posture, which is convenient for chamfering and polishing the micro part A. The application realizes high-precision circumferential chamfering and polishing of the micro part A by rotating the micro part A around its axis with the universal dividing head 202 under the condition that other angles are unchanged, solves the problem of insufficient chamfering precision caused by poor control of force during circumferential operation in traditional manual chamfering, and overcomes the difficulty that traditional polishing and chamfering tools cannot well realize small size and multi-angle polishing and chamfering, so that the polishing and chamfering operation is more accurate and flexible. At the same time, the application is not a micro part such as a micro part A directly clamped and fixed by the three-jaw chuck 101, but a cylindrical split clamping head 102 rear section clamped and fixed by the three-jaw chuck 101, and the front section of the split clamping head 102 is a split open clamping section in the form of a tapered column, the split open clamping section in the form of a tapered column is composed of a plurality of elastic metal sheets which are completely the same and circumferentially surround the split clamping head 102, and the part close to the rear section of the elastic metal sheet is provided with a locking screw, and the tightening or loosening of the locking screw changes the radial deformation of the split open clamping section in the form of a tapered column, thereby achieving the clamping effect of the micro part A such as a bleeding cage; the split open clamping section in the form of a tapered column of the front section of the split clamping head 102 applies uniform and small pressure on the micro part A, clamps the small micro part A, avoids the problems of unstable clamping or damage of the part due to unstable clamping when the three-jaw chuck 101 directly clamps the small and fragile part, and greatly improves the production efficiency of the high-precision micro part A.

[0048] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A chamfering and polishing fixture for miniature parts, characterized in that: The device includes a clamping assembly (10) for clamping a micro part (A), an attitude adjustment unit (20) for driving the clamping assembly (10) to move and / or rotate, and a frame (40) for fixing the clamping assembly (10) and the attitude adjustment unit (20). The area of ​​the micro part (A) to be processed is exposed outside the body of the clamping assembly (10). A chamfering and polishing unit (30) is disposed above the area of ​​the micro part (A) to be processed. The attitude adjustment unit (20) and the chamfering and polishing unit (30) cooperate with each other to chamfer and polish the micro part (A). The attitude adjustment unit (20) includes a base plate (201) and a universal indexing head (202) disposed on the base plate (201). The universal indexing head (202) includes a rotating body (2021) that is fitted into an arc-shaped groove in the base plate (201) and forms a rotational fit. The rotating body (2021) has a main shaft (2022) protruding towards the chamfering and polishing unit (30). The main shaft (2022) and the rotating body (2021) form an axial limiting and circumferential rotational fit. The clamping assembly (10) is disposed at the front end of the main shaft (2022). The universal indexing head (202) drives the clamping assembly (10) to rotate circumferentially to any angle. The rotating body (2021) is equipped with a worm gear mechanism inside, wherein the worm gear is coaxially connected to the main shaft (2022), and the worm is supported and installed on the rotating body (2021) by an eccentric sleeve. One end of the worm protrudes out of the rotating body (2021) and is connected to the first handwheel (2023). Rotating the first handwheel (2023) drives the main shaft (2022) to rotate. The clamping assembly (10) includes a three-jaw chuck (101) and a split clamping head (102). The rear section of the split clamping head (102) is cylindrical and the front section is conical, forming an open split clamping section. The three-jaw chuck (101) clamps the rear section of the split clamping head (102), and a locking screw is provided at this position. Tightening or loosening the locking screw provides a radial constraint force to drive the open split clamping section to undergo radial deformation.

2. The micro-part chamfering and polishing fixture according to claim 1, characterized in that: The frame (40) includes a base (401), horizontal guide columns (403), a first lead screw (404), and a second handwheel (405). The upper surface of the base (401) is provided with two horizontal guide columns (403) and a horizontally arranged first lead screw (404). The horizontal guide columns (403) are located on both sides of the first lead screw (404) and are parallel to each other. The lower surface of the base plate (201) is fixedly provided with a first slider (203), which slides on the horizontal guide columns (403). The first slider (203) and the horizontal guide columns (405) are connected. 403) forms a sliding fit that allows circumferential rotation and axial positioning; the first slider (203) has a threaded hole in the middle for the first lead screw (404) to pass through, and the two form a lead screw and nut mechanism. One end of the first lead screw (404) extends to the bottom of the chamfering and polishing unit (30). The end of the first lead screw (404) away from the chamfering and polishing unit (30) is connected to the second handwheel (405). Rotating the second handwheel (405) drives the first lead screw (404) to rotate circumferentially and drives the attitude adjustment unit (20) to move back and forth along the length direction of the horizontal guide post (403).

3. The micro-part chamfering and polishing fixture according to claim 2, characterized in that: The chamfering and polishing unit (30) includes a motor (301), the shaft of which is arranged vertically and extends downwards, and a pin (302) is coaxially fixed on the shaft. The motor (301) drives the pin (302) to rotate to chamfer and polish the micro part (A).

4. The micro-part chamfering and polishing fixture according to claim 3, characterized in that: The frame (40) further includes a support (402), vertical guide columns (408), a second lead screw (406), and a third handwheel (407). The support (402) has two vertical guide columns (408) and a second lead screw (406) arranged vertically on its front side. The vertical guide columns (408) are located on both sides of the second lead screw (406) and are parallel to each other. The motor (301) is fixed to the front side of the second slider (303), which is slidably mounted on the vertical guide columns (408). The second slider (303) and the vertical guide post (408) form a sliding fit that allows for circumferential rotation and axial limiting. The middle part of the second slider (303) is provided with a threaded hole through which the second lead screw (406) passes, and the two together form a lead screw and nut mechanism. The top of the second lead screw (406) in the vertical direction is connected to the third handwheel (407). Rotating the third handwheel (407) drives the second lead screw (406) to rotate circumferentially and drives the attitude adjustment unit (20) to move up and down along the length direction of the vertical guide post (408).

5. The micro-part chamfering and polishing fixture according to claim 4, characterized in that: The support (402) is vertically fixed at one end of the upper surface of the base (401) along its length direction. The support (402) and the base (401) are L-shaped. The posture adjustment unit (20) is disposed on the upper surface of the base (401). The chamfering and polishing unit (30) is disposed on the upper half of the front side of the support (402).

6. The micro-part chamfering and polishing fixture according to claim 4, characterized in that: Limiting baffles are provided at both ends of the horizontal guide post (403) and the vertical guide post (408).

7. The micro-part chamfering and polishing fixture according to claim 1, characterized in that: The machining accuracy of the micro part (A) is 0.01 mm.

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