CN117444778A

CN117444778A - Automatic polishing machine for medical needle

Info

Publication number: CN117444778A
Application number: CN202311375440.0A
Authority: CN
Inventors: 廖连华; 钟文栋
Original assignee: Shenzhen Aside Technology Co ltd
Current assignee: Shenzhen Aside Technology Co ltd
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-01-26

Abstract

The invention discloses an automatic polishing machine for medical needles, which comprises a discharging device, a rack, a conveying device and clamps, wherein the conveying device comprises four first motors, chain wheels, chains and transmission shafts, the two chains and the two transmission shafts are respectively sleeved on the outer sides of the four chain wheels, the two chains are arranged side by side, the transmission shafts are fixedly connected with the two chain wheels, the first motors are arranged on the rack, the output shafts of the first motors are fixedly connected with one transmission shaft, the clamps are arranged in a plurality, and the clamps are fixed on the two chains at equal intervals.

Description

Automatic polishing machine for medical needle

Technical Field

The invention discloses an automatic polishing machine for medical needles, and belongs to the technical field of medical equipment processing equipment.

Background

The disposable needle is one of the most commonly used medical instruments, as shown in fig. 1, the disposable needle is composed of a needle tip 2, a needle stem and a needle plug 1, wherein the needle tip 2 and the needle stem are formed by processing stainless steel needle tubes, the needle plug 1 is composed of high polymer materials, the needle tip 2 and the needle stem are formed into the needle plug 1 coated on the outer side of the needle stem through injection molding after processing, the needle tip 2 is provided with two side sharp faces 4 and a guide face 3, so that the use requirement of injection can be met, the side sharp faces 4 and the guide face 3 are required to be polished after processing is finished, so that the damage to skin caused by processing residual burrs on the surface of the needle tip 2 is reduced, and because the existing polishing equipment and equipment for processing the side sharp faces 4 and the guide face 3 are separately designed, the production time of the needle is greatly increased by two processing procedures, the production efficiency is reduced, the needle tip is damaged due to repeated feeding and clamping is carried out.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides an automatic polishing machine for medical needles.

The automatic polishing machine for the medical needles comprises a discharging device, a frame, a conveying device and clamps, wherein the conveying device comprises a first motor, chain wheels, chains and transmission shafts, the chain wheels are provided with four, the chains and the transmission shafts are respectively provided with two, the two chains are respectively sleeved on the outer sides of the four chain wheels, the chains are arranged side by side, the transmission shafts are fixedly connected with the two chain wheels, the first motor is arranged on the frame, an output shaft of the first motor is fixedly connected with one transmission shaft, the clamps are provided with a plurality of clamps and are fixed on the two chains at equal intervals, the horizontal section of the chains is provided with at least four clamps, each clamp comprises a mounting seat, a pre-pressing piece, a pressing rod and a driving piece, the mounting seat is provided with a stepped through groove for mounting the needles, the bottoms of the stepped through grooves are of semi-cylindrical structures, the tops of the pressing rod are provided with two ends, the chains are symmetrically and slidingly arranged on the inner sides of the mounting seats, the stepped through grooves are positioned on the two chain wheels, the first motor is fixedly connected with one side of the frame, the clamps are positioned on one side of the polishing device, the two sides of the polishing device can be driven by the milling device, and the milling device is arranged on one side of the milling device for driving the needle.

Preferably, the discharging device comprises a discharging frame, a second motor and a rotating cylinder, wherein a discharging groove with a vertical structure is arranged in the discharging frame, the rotating cylinder is rotatably arranged at the lower end of the discharging frame and is fixedly connected with an output shaft of the second motor, and the rotating cylinder is positioned in the discharging groove and is provided with a receiving baffle with a semi-cylindrical structure.

Preferably, the driving piece includes fly frame, actuating lever, U-shaped frame and supports the pressure post, the actuating lever is provided with two to symmetrical slidable mounting is in the mount pad, the slip direction of pressure post is perpendicular with the actuating lever, and both have the inclined plane of mutually supporting, the one end and the fly frame fixed connection of actuating lever, the other end is located the mount pad and is provided with first spring, the one end that the pressure post is close to the ladder and leads to the groove is arc structure, and the other end is T-shaped structure, be provided with the second spring that is used for applying the effort of keeping away from the ladder and leading to the groove to the pressure post in the mount pad, all be provided with the spacing groove of restriction both sliding distance on pressure post and the actuating lever, the U-shaped frame is fixed on the fly frame, the one end of supporting the pressure post is fixed on the U-shaped frame, the other end is hemispherical structure, be provided with the pin in the frame, the one end that is close to the blowing device has the wedge face, it can slide along the wedge face and drive the fly frame and move towards the direction that the ladder leads to the groove to the pressure post.

Preferably, the pre-pressing piece comprises a limit bolt, a push block and a third spring, wherein the push block is positioned in the stepped through groove, one end of the limit bolt penetrates through the movable frame and then is fixedly connected with the push block, the third spring is sleeved on the limit bolt, and two ends of the third spring are respectively abutted against the push block and the movable frame.

Preferably, the milling device comprises a milling cutter, a fixing seat, a third motor, a first sliding seat, a second sliding seat and a first supporting seat, wherein the fixing seat is slidably arranged on the first sliding seat, the third motor is arranged on the fixing seat, the milling cutter is fixed on an output shaft of the third motor, a first screw rod and a fourth motor for driving the fixing seat to move up and down are arranged on the first sliding seat, a first guide rod, a second screw rod and a fifth motor for driving the first sliding seat to horizontally move are arranged on the second sliding seat, and a second guide rod, a sixth motor and a third screw rod for driving the second sliding seat to approach or depart from the clamp are arranged on the first supporting seat.

Preferably, the grinding device comprises a second supporting seat, a grinding disc and a seventh motor, wherein an installation table is arranged on the second supporting seat, the grinding disc is rotationally connected with the installation table, the seventh motor is arranged on the second supporting seat, an output shaft is fixedly connected with the grinding disc, and the top of the grinding disc is provided with a grinding surface in a round table shape.

Preferably, the polishing device comprises a mounting cylinder, a third sliding seat, a fixed shaft, a polishing brush, a driving gear, a driven gear, an eighth motor and a third supporting seat, wherein the mounting cylinder is of a hollow structure and is fixedly connected with the fixed shaft, the polishing brush is provided with a plurality of rows, one end of the polishing brush is fixed on the mounting cylinder, the other end of the polishing brush is positioned in the mounting cylinder, the fixed shaft is rotationally connected with the third sliding seat, the eighth motor is mounted on the third sliding seat, the driving gear is fixed on an output shaft of the eighth motor, the driven gear is fixed on the fixed shaft and meshed with the driving gear, and a third guide rod, a ninth motor and a fourth screw rod, which are used for driving the third sliding seat to be close to or far away from a clamp, are arranged on the third supporting seat.

Compared with the prior art, the invention has the beneficial effects that:

through setting up anchor clamps, conveyer, milling unit, grinding device and burnishing device, anchor clamps can press from both sides the pintle tight, keep the needle point to expose in the outside of anchor clamps, conveyer can carry the distance to anchor clamps for the needle point passes through milling unit, grinding device and burnishing device in proper order, thereby realizes milling of side sharp face, grinding of guide surface and needle point surface burring burnishing treatment, because the syringe needle enters into in the anchor clamps by blowing device control, the anchor clamps can loosen the clamp to the syringe needle automatically after the polishing is accomplished, so can realize automatic discharge, can realize the automatic control of syringe needle processing polishing like this.

Drawings

FIG. 1 is a schematic view of a needle;

FIG. 2 is a schematic view of a medical needle automatic polisher according to the present invention;

FIG. 3 is a schematic view of the structure of the conveyor and the clamp according to the present invention;

FIG. 4 is a schematic diagram of the internal structure of the discharging device in the present invention;

FIG. 5 is a schematic view of the needle and clip of the present invention;

FIG. 6 is a partial cross-sectional view of a clamp of the present invention;

FIG. 7 is a schematic view of the structure of the hold-down bar, driver and pre-press of the present invention;

FIG. 8 is a schematic view of the structure of the fixture and milling device of the present invention;

FIG. 9 is a schematic view of the structure of the jig and the grinding apparatus of the present invention;

FIG. 10 is a schematic view showing the structure of a jig and a polishing apparatus according to the present invention;

reference numerals: 1. a pintle; 2. a needle tip; 3. a guide surface; 4. a side tip surface; 5. a stop lever; 6. a frame; 7. a transmission shaft; 8. a chain; 9. a sprocket; 10. a first motor; 11. a discharging device; 12. a milling device; 13. a grinding device; 14. a polishing device; 15. a clamp; 16. a wedge surface; 17. a discharge groove; 18. a discharging frame; 19. a second motor; 20. a rotating cylinder; 21. receiving a material baffle plate; 22. a step through groove; 23. a pre-press; 24. a driving member; 25. a mounting base; 26. a pressing rod; 27. a second spring; 28. an inclined plane; 29. a first spring; 30. a driving rod; 31. a pushing block; 32. a movable frame; 33. a third spring; 34. a pressing column; 35. a U-shaped frame; 36. a limit bolt; 37. a limit groove; 38. a milling cutter; 39. a third motor; 40. a second screw; 41. a second sliding seat; 42. a fourth motor; 43. a first sliding seat; 44. a first screw; 45. a fixing seat; 46. a fifth motor; 47. a first guide bar; 48. a first support base; 49. a second guide bar; 50. a third screw; 51. grinding the surface; 52. grinding disc; 53. a second support base; 54. a seventh motor; 55. a mounting table; 56. a mounting cylinder; 57. a polishing brush; 58. a driven gear; 59. a fixed shaft; 60. a ninth motor; 61. a third support base; 62. a drive gear; 63. a third sliding seat; 64. a third guide bar; 65. a fourth screw; 66. and an eighth motor.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1-10, an automatic polishing machine for medical needles comprises a discharging device 11, a frame 6, a conveying device and a clamp 15, wherein the conveying device comprises a first motor 10, a chain wheel 9, chains 8 and a transmission shaft 7, the chain wheels 9 are provided with four, the chains 8 and the transmission shaft 7 are respectively provided with two stepped through grooves 22 for installing needles, the two chains 8 are respectively sleeved outside the four chain wheels 9, the chains 8 are arranged side by side, the transmission shaft 7 and the two chain wheels 9 are fixedly connected, the first motor 10 is installed on the frame 6, an output shaft of the first motor is fixedly connected with one of the transmission shafts 7, the clamp 15 is provided with a plurality of clamps 15 and is fixed on the two chains 8 at equal intervals, the horizontal section of the chains 8 is provided with at least four clamps 15, the clamp 15 comprises a mounting seat 25, a pre-pressing piece 23, a pressing rod 26 and a driving piece 24, the mounting seat 25 is provided with two stepped through grooves 22 for installing needles, the bottoms of the stepped through grooves 22 are respectively sleeved outside the four chain wheels 9, the two ends of the pressing rod 26 are symmetrically and slidingly installed inside the mounting seat 25, the stepped through grooves 23 are positioned on the frame 6, the stepped through grooves 22 are positioned on one side of the driving piece 24 and are positioned on one side of the frame 12 and are in front of the milling device, one side of the milling device is provided with a milling device for driving the needle head 12, and the milling device is arranged on one side of the milling device is provided with one side of the clamp device 12, and the milling device is simultaneously, and one side of the clamp device is provided with one side of the clamp device for milling device is provided with one side 12 is 12, and is driven by the milling device is provided with one side of the milling device is 12 and has one side is 13 and has one side is driven.

As shown in fig. 2 and 4, the discharging device 11 includes a discharging frame 18, a second motor 19 and a rotating cylinder 20, a discharging groove 17 with a vertical structure is arranged in the discharging frame 18, the rotating cylinder 20 is rotatably installed at the lower end of the discharging frame 18 and fixedly connected with an output shaft of the second motor 19, the rotating cylinder 20 is located in the discharging groove 17 and is provided with a receiving baffle 21 with a semi-cylindrical structure, the second motor 19 drives the rotating cylinder 20 to rotate, so that the discharging groove 17 synchronously rotates, and when a stepped through groove 22 on an installation seat 25 is located right below the discharging groove 17, one needle can be carried out from the discharging groove 17 by the rotating cylinder 20 and automatically falls into the stepped through groove 22, so that automatic discharging control of a single needle is realized without manual discharging.

As shown in fig. 2, 5, 6 and 7, the driving member 24 includes a movable frame 32, a driving rod 30, a U-shaped frame 35 and a pressing column 34, the driving rod 30 is provided with two driving rods, and symmetrically and slidably mounted in the mounting seat 25, the pressing rod 26 is perpendicular to the sliding direction of the driving rod 30, and has mutually matched inclined planes 28, one end of the driving rod 30 is fixedly connected with the movable frame 32, the other end is located in the mounting seat 25 and is provided with a first spring 29, one end of the pressing rod 26 close to the stepped through groove 22 is in an arc structure, the other end is in a T-shaped structure, the mounting seat 25 is internally provided with a second spring 27 for applying a force to the pressing rod 26 away from the stepped through groove 22, both the pressing rod 26 and the driving rod 30 are provided with limiting grooves for limiting the sliding distance of the pressing rod 26 and the driving rod 30, the U-shaped frame 35 is fixed on the movable frame 32, one end of the pressing column 34 is fixed on the U-shaped frame 35, the other end is in a hemispherical structure, a stop lever 5 is arranged on the frame 6, one end of the stop lever 5, which is close to the discharging device 11, is provided with a wedge-shaped surface 16, a pressing column 34 can slide along the wedge-shaped surface 16 and drive a movable frame 32 to move towards the direction close to the stepped through groove 22, when the pressing column 34 is driven by a chain 8 to move horizontally, the pressing column slides along the wedge-shaped surface 16 and pushes the movable frame 32 to move towards the stepped through groove 22, so that a pre-pressing piece 23 and a driving rod 30 move synchronously, the driving rod 30 slides in a mounting seat 25, a pressing rod 26 moves towards the direction close to the pintle 1 by virtue of the cooperation of an inclined surface 28, and finally, the pintle 1 is clamped by virtue of two pressing rods 26, so that the pintle 1 is prevented from rotating in the needle processing, at the moment, the first spring 29 and the second spring 27 are in a compressed state, when the pressing column 34 is separated from the interference with the stop lever 5, the first spring 29 and the second spring 27 drive the driving rod 30 and the pressing rod 26 to reset respectively, so that the clamping of the pintle 1 can be released, and when the chain 8 drives the clamp 15 to rotate from the upper part to the lower part, the needle head can automatically fall from the opening of the stepped through groove 22, thereby realizing automatic discharging.

As shown in fig. 2 and 7, the pre-pressing piece 23 includes a limit bolt 36, a push block 31 and a third spring 33, the push block 31 is located in the stepped through groove 22, one end of the limit bolt 36 passes through the movable frame 32 and is fixedly connected with the push block 31, the third spring 33 is sleeved on the limit bolt 36, two ends of the third spring respectively abut against the push block 31 and the movable frame 32, the limit bolt 36 and the push block 31 can move synchronously along with the movable frame 32, when the push block 31 abuts against the end of the pintle 1, the push block 31 can push the pintle 1 to slide in the stepped through groove 22 first, and when the pintle 1 abuts against the stepped through groove 22 and cannot move, the push block 31 starts to compress the third spring 33 at the moment, so that the push block 31 is prevented from overpressure on the pintle 1 until the movable frame 32 drives the driving rod 30 to slide, and the pressing rod 26 clamps the pintle 1.

As shown in fig. 2 and 8, the milling device 12 includes a milling cutter 38, a fixed seat 45, a third motor 39, a first sliding seat 43, a second sliding seat 41 and a first supporting seat 48, the fixed seat 45 is slidably mounted on the first sliding seat 43, the third motor 39 is mounted on the fixed seat 45, the milling cutter 38 is fixed on an output shaft of the third motor 39, the first sliding seat 43 is provided with a first screw 44 and a fourth motor 42 for driving the fixed seat 45 to move up and down, the second sliding seat 41 is provided with a first guide rod 47, a second screw 40 and a fifth motor 46 for driving the first sliding seat 43 to move horizontally, the first supporting seat 48 is provided with a second guide rod 49, a sixth motor and a third screw 50 for driving the second sliding seat 41 to approach or depart from the clamp 15, the sixth motor drives the third screw 50 to rotate, so that the second sliding seat 41 moves towards a direction approaching the clamp 15, the fourth motor 42 and the fifth motor 46 drive the first screw 44 and the second screw 40 to rotate respectively, and the right and the left and the right screws 38 can control the positions of the milling cutter 38 to rotate smoothly, and the milling cutter 4 on the left and the lower sides of the milling cutter is completed.

As shown in fig. 2 and 9, the grinding device 13 includes a second supporting seat 53, a grinding disc 52 and a seventh motor 54, the second supporting seat 53 is provided with an installation table 55, the grinding disc 52 is rotationally connected with the installation table 55, the seventh motor 54 is installed on the second supporting seat 53, the output shaft is fixedly connected with the grinding disc 52, the top of the grinding disc 52 is provided with a grinding surface 51 in a truncated cone shape, the seventh motor 54 drives the grinding disc 52 to rotate, the inclination of the section of the grinding surface 51 is the same as the inclination of the guide surface 3, and thus the guide surface 3 can be processed at the end part of the needle point 2.

As shown in fig. 2 and 10, the polishing device 14 includes a mounting cylinder 56, a third sliding seat 63, a fixed shaft 59, a polishing brush 57, a driving gear 62, a driven gear 58, an eighth motor 66 and a third supporting seat 61, the mounting cylinder 56 is of a hollow structure and is fixedly connected with the fixed shaft 59, the polishing brush 57 is provided with a plurality of rows, one end of the polishing brush 57 is fixed on the mounting cylinder 56, the other end of the polishing brush is located in the mounting cylinder 56, the fixed shaft 59 is rotationally connected with the third sliding seat 63, the eighth motor 66 is mounted on the third sliding seat 63, the driving gear 62 is fixed on an output shaft of the eighth motor 66, the driven gear 58 is fixed on the fixed shaft 59 and is meshed with the driving gear 62, the third supporting seat 61 is provided with a third guide rod 64 for driving the third sliding seat 63 to be close to or far away from the clamp 15, a ninth motor 60 and a fourth screw 65, the ninth motor 60 drives the fourth screw 65 to rotate, so that the third sliding seat 63 can horizontally slide along the third guide rod 64 to drive the mounting cylinder 56 and the polishing brush 57 to be close to 2, and simultaneously the eighth motor 66 drives the driving gear 62 to rotate, so that the driven gear 58 drives the driven gear 58 to rotate, and the driven gear 58 to drive the driven gear 7 to rotate to the needle point 2, and the needle point can be removed from the needle point 2, and the needle point can be processed, and the needle point can be removed, and the needle point can be processed, and the needle point can be a needle point can be processed, and the needle point can be processed.

Working principle: the needle to be processed is placed in the discharge groove 17, the second motor 19 drives the rotary cylinder 20 to rotate, so that after one needle enters the material receiving baffle piece 21, the needle rotates 180 degrees and automatically falls into the stepped through groove 22, the mounting seat 25 moves along with the chain 8, the pressing column 34 slides along the wedge-shaped surface 16 and drives the movable frame 32 to move so that the driving rod 30 and the pre-pressing piece 23 move towards the direction close to the stepped through groove 22, the limit bolt 36 firstly drives the push block 31 to press the needle bolt 1 into the stepped through groove 22, the exposed length of one end of the needle point 2 is kept consistent, the driving rod 30 can drive the pressing rod 26 to clamp the needle bolt 1, then the needle sequentially passes through the milling cutter 38, the grinding disc 52 and the circumference polishing of the polishing brush 57, the needle point can be processed and polished by one-time clamping, the production efficiency is effectively improved, and meanwhile, the needle point 2 cannot be damaged due to secondary clamping.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides an automatic burnishing machine of medical needle, includes blowing device (11), frame (6), conveyer and anchor clamps (15), its characterized in that, conveyer includes first motor (10), sprocket (9), chain (8) and transmission shaft (7), sprocket (9) are provided with four, chain (8) and transmission shaft (7) all are provided with two, two chain (8) are overlapped respectively and are established in the outside of four sprocket (9), and chain (8) are according to setting up side by side, transmission shaft (7) and two sprocket (9) fixed connection, first motor (10) are installed on frame (6), and its output shaft and one of them transmission shaft (7) fixed connection, anchor clamps (15) are provided with a plurality of to fix on two chains (8) according to equidistant, have at least four anchor clamps (15) on the horizontal segment of chain (8), anchor clamps (15) include mount pad (25), piece (23), hold-down lever (26) and driving piece (24), have one on the mount pad (25) and be used for two seal down groove (22) are the top of two seal-pressing groove structures, two seal pin structures are set up, and symmetry slidable mounting is in the inboard of mount pad (25), pre-compaction piece (23) are located the one end of ladder logical groove (22) to be connected with driving piece (24), driving piece (24) are installed on mount pad (25) to can drive driving piece (24) to support the syringe needle and press against in ladder logical groove (22), drive two hold-down bars (26) simultaneously and press from both sides tight syringe needle both sides, blowing device (11) are located directly over one of them anchor clamps (15), one side of frame (6) is provided with milling unit (12) that are used for carrying out milling to the syringe needle, one side of milling unit (12) is provided with grinding device (13) that grinds the syringe needle, one side of grinding device (13) is provided with burnishing device (14) that carry out circumference polishing to the syringe needle.

2. The automatic medical needle polishing machine according to claim 1, wherein the discharging device (11) comprises a discharging frame (18), a second motor (19) and a rotating cylinder (20), a discharging groove (17) with a vertical structure is arranged in the discharging frame (18), the rotating cylinder (20) is rotatably arranged at the lower end of the discharging frame (18) and is fixedly connected with an output shaft of the second motor (19), and the rotating cylinder (20) is positioned in the discharging groove (17) and is provided with a receiving baffle (21) with a semi-cylindrical structure.

3. The automatic polishing machine for medical needles according to claim 1, wherein the driving piece (24) comprises a movable frame (32), a driving rod (30), a U-shaped frame (35) and a pressing column (34), the driving rod (30) is provided with two second springs (27) which are symmetrically and slidably arranged in the mounting seat (25), the pressing rod (26) and the driving rod (30) are perpendicular to each other in sliding direction, the two driving rod (30) are provided with mutually matched inclined planes (28), one end of the driving rod (30) is fixedly connected with the movable frame (32), the other end of the driving rod (30) is positioned in the mounting seat (25) and provided with a first spring (29), one end of the pressing rod (26) close to the stepped through groove (22) is of an arc-shaped structure, the other end of the pressing rod (26) is of a T-shaped structure, the mounting seat (25) is internally provided with a second spring (27) which is used for applying acting force away from the stepped through groove (22), the pressing rod (26) and the driving rod (30) are provided with limiting grooves (37) which limit sliding distance between the pressing rod and the pressing rod, the U-shaped frame (35) is fixedly connected with the movable frame (32), the other end of the pressing rod (30) is provided with a stop bar (5) on the mounting seat (5), the other end of the pressing rod (35) is provided with a stop bar (5), the pressing column (34) can slide along the wedge-shaped surface (16) and drive the movable frame (32) to move towards the direction approaching the stepped through groove (22).

4. A medical needle automatic polishing machine according to claim 3, wherein the pre-pressing piece (23) comprises a limit bolt (36), a push block (31) and a third spring (33), the push block (31) is located in the stepped through groove (22), one end of the limit bolt (36) penetrates through the movable frame (32) and then is fixedly connected with the push block (31), the third spring (33) is sleeved on the limit bolt (36), and two ends of the third spring are respectively abutted against the push block (31) and the movable frame (32).

5. The automatic medical needle polishing machine according to claim 1, wherein the milling device (12) comprises a milling cutter (38), a fixed seat (45), a third motor (39), a first sliding seat (43), a second sliding seat (41) and a first supporting seat (48), the fixed seat (45) is slidably mounted on the first sliding seat (43), the third motor (39) is mounted on the fixed seat (45), the milling cutter (38) is fixed on an output shaft of the third motor (39), a first screw (44) and a fourth motor (42) for driving the fixed seat (45) to move up and down are arranged on the first sliding seat (43), a first guide rod (47), a second screw (40) and a fifth motor (46) for driving the first sliding seat (43) to move horizontally are arranged on the second sliding seat (41), and a second guide rod (49), a third screw (50) for driving the second sliding seat (41) to approach or depart from the clamp (15) are arranged on the first supporting seat (48).

6. The automatic polishing machine for medical needles according to claim 1, characterized in that the grinding device (13) comprises a second supporting seat (53), a grinding disc (52) and a seventh motor (54), a mounting table (55) is arranged on the second supporting seat (53), the grinding disc (52) is rotationally connected with the mounting table (55), the seventh motor (54) is arranged on the second supporting seat (53), an output shaft is fixedly connected with the grinding disc (52), and the top of the grinding disc (52) is provided with a grinding surface (51) in the shape of a round table.

7. The automatic polishing machine for medical needles according to claim 1, wherein the polishing device (14) comprises a mounting cylinder (56), a third sliding seat (63), a fixed shaft (59), a polishing brush (57), a driving gear (62), a driven gear (58), an eighth motor (66) and a third supporting seat (61), the mounting cylinder (56) is of a hollow structure and is fixedly connected with the fixed shaft (59), the polishing brush (57) is provided with a plurality of rows, one end of the polishing brush is fixed on the mounting cylinder (56), the other end of the polishing brush is positioned in the mounting cylinder (56), the fixed shaft (59) is rotatably connected with the third sliding seat (63), the eighth motor (66) is mounted on the third sliding seat (63), the driving gear (62) is fixed on an output shaft of the eighth motor (66), the driven gear (58) is fixed on the fixed shaft (59) and is meshed with the driving gear (62), and a third guide rod (64) and a fourth screw (65) for driving the third sliding seat (63) to be close to or far from the clamp (15) are arranged on the third supporting seat (61).