CN115570191B

CN115570191B - Groove milling device of needle cylinder of circular knitting machine

Info

Publication number: CN115570191B
Application number: CN202211212062.XA
Authority: CN
Inventors: 陈玉保
Original assignee: Shaoxing Zhantai Machinery Co ltd
Current assignee: Shaoxing Zhantai Machinery Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-05-30
Anticipated expiration: 2042-09-30
Also published as: CN115570191A

Abstract

The invention discloses a slot milling device of a needle cylinder of a circular knitting machine, which is characterized in that: the automatic milling machine comprises a machine base, wherein a moving seat capable of moving along the length direction of the machine base is arranged on the machine base, a chuck is arranged on the upper portion of the moving seat, an indexing mechanism is arranged between the moving seat and the chuck and used for driving the chuck to rotate at a certain angle gap of the moving seat, a primary milling mechanism is arranged on the right side of the machine base, a guide rail is arranged on the side face of the machine base, a scale is embedded in the middle position of the upper portion of the guide rail, a finish milling mechanism is arranged on the guide rail, a plurality of clamping jaws are arranged on the chuck, adjusting holes are formed in the clamping jaws, the upper portion of each clamping jaw is provided with a tight supporting block, and the inner side of the tight supporting block is connected with a fixed block. The invention divides the groove milling process into rough milling and finish milling, and reduces the single processing amount, thereby reducing the error in processing.

Description

Groove milling device of needle cylinder of circular knitting machine

Technical Field

The invention relates to the technical field of circular knitting machines, in particular to a slot milling device of a needle cylinder of a circular knitting machine.

Background

The circular knitting machine is characterized in that the circular knitting machine has a large number of looping systems, high rotating speed, high yield, quick pattern deformation, good fabric quality, few working procedures and strong product adaptability, so that the development is quick, the needle cylinder of the circular knitting machine is used for placing knitting needles, the needle cylinder needs to be used for milling grooves on the needle cylinder during processing, and the groove milling machine needs to be used for milling grooves. A traditional slotting machine adopts a milling cutter for slotting once, and the processing amount of one-time processing is large and easy to cause errors, so that the precision of the needle slot of the needle cylinder is insufficient.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a groove milling device of a needle cylinder of a circular knitting machine.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the utility model provides a milling flutes device of knitting circular knitting machine cylinder, which comprises a frame, be provided with the removal seat that can follow frame length direction and remove on the frame, remove seat upper portion and be provided with the chuck, be provided with indexing mechanism between removal seat and the chuck, indexing mechanism is used for driving the chuck and is rotated according to certain angle clearance at removing the seat, the frame right side is equipped with and just mills the mechanism, the frame side is provided with the guide rail, guide rail upper portion intermediate position inlays and is equipped with the scale, be provided with finish milling mechanism on the guide rail, be provided with a plurality of jack catchs on the chuck, set up the regulation hole on the jack catch, jack catch upper portion is provided with and supports tight piece, it is connected with the fixed block to support tight piece inboard, the bolt passes the fixed block and screws into in the regulation hole.

Preferably, a first lead screw motor is arranged in the machine base, a first lead screw is connected to the first lead screw motor in a driving mode, a first lead screw sliding block is arranged on the first lead screw, the upper end of the first lead screw sliding block is connected with the lower end of the movable seat, guide seats are arranged on the left side and the right side of the upper portion of the machine base, guide rods are connected between the left guide seat and the right guide seat, and the guide rods penetrate through the movable seat.

Preferably, the primary milling mechanism comprises a frame, a screw motor IV is arranged on the upper portion of the frame, a screw rod IV is connected to the lower portion of the screw motor IV in a driving mode, a screw rod sliding block IV is arranged on the screw rod IV, a lifting block II is connected to the left side of the screw rod sliding block IV, a cutter rest II is arranged on the left side of the lifting block II, a primary milling cutter and a driving motor II are arranged on the cutter rest II, and belt transmission is adopted between the primary milling cutter and the driving motor II.

Preferably, the finish milling mechanism comprises a supporting block arranged on a guide rail, the left side and the right side of the lower part of the supporting block are connected with mounting plates, the inner sides of the mounting plates are respectively provided with a movable ball, the left side and the right side of the guide rail are respectively provided with a ball groove, the movable balls are arranged in the ball grooves, one mounting plate is connected with a fixing bolt through threads, and the inner end of the fixing bolt is connected with a limiting block; the upper portion of the supporting block is connected with a screw rod sliding block II, a screw rod seat is arranged above the supporting block, a screw rod motor II is arranged on the right side of the screw rod seat, a screw rod II is connected to the left side of the screw rod motor II in a driving mode, the screw rod sliding block II is arranged on the screw rod II, a vertical plate is arranged on the left side of the screw rod seat, a screw rod III is arranged in the vertical plate in a rotating mode, the upper end of the screw rod III penetrates out of the vertical plate and is connected with a driven bevel gear, a screw rod motor III is arranged on the upper portion of the screw rod seat, a driving bevel gear is connected to the upper portion of the screw rod motor III in a driving mode, the driving bevel gear is meshed with the driven bevel gear, a screw rod sliding block III is arranged on the upper portion of the screw rod III, a lifting block I is connected to the left side of the lifting block I, a finish milling cutter and a driving motor I are arranged on the left side of the lifting block I, and belt transmission is adopted between the finish milling cutter and the driving motor I.

Preferably, a thrust ball bearing is arranged between the movable seat and the chuck, a lower ring of the thrust ball bearing is fixed on the movable seat, a plurality of protruding blocks are arranged on the upper portion of an upper ring of the thrust ball bearing, a plurality of clamping grooves for embedding the protruding blocks are formed in the lower portion of the chuck, a mounting groove is formed in the movable seat, the indexing mechanism comprises a mounting ring located at the lower portion of the chuck, a worm wheel is connected to the lower portion of the mounting ring and located in the mounting groove, a worm is arranged in the mounting groove, and the worm is meshed with the worm wheel.

Preferably, a center block is arranged in the middle of the mounting groove in the movable seat, a plurality of supporting balls are arranged on the upper portion of the center block, and the bottom surface of the chuck is contacted with the supporting balls.

Compared with the prior art, the invention has the beneficial effects that: the groove milling process is divided into two steps of rough milling and finish milling, the size of the groove to be milled in each step is reduced, the speed of the groove milling in each step can be increased, and meanwhile, the rough milling and the finish milling are synchronously carried out, so that the overall efficiency of the groove milling is increased; because the size of each step of milling groove is reduced, the heat generated in the groove milling process is less, the deformation of the material of the needle cylinder is smaller, errors are not easy to occur, and the accuracy of the milling groove is improved; the finish milling stage can compensate errors possibly existing in the rough milling stage, so that the opportunity for remedying is increased, the error is reduced, and the reliability is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a schematic view of the finish milling mechanism according to the present invention;

FIG. 4 is an enlarged schematic view at B in FIG. 1;

FIG. 5 is a schematic view of the structure of the claw in the invention;

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

FIG. 7 is an enlarged schematic view of FIG. 6 at A;

FIG. 8 is a schematic view of a limiting mechanism according to the present invention;

FIG. 9 is a cross-sectional view of a spacing mechanism of the present invention;

FIG. 10 is an enlarged schematic view of the invention at A in FIG. 9;

fig. 11 is a schematic structural view of a buffer mechanism in the present invention.

Reference numerals: 1. a base; 2. a first screw rod; 3. a guide rod; 4. a movable seat; 5. a chuck; 6. a frame; 7. a guide rail; 8. a graduated scale; 9. a screw rod seat; 10. a slide rail; 11. a limiting mechanism; 12. a transmission bevel gear I; 13. a vertical plate; 14. lifting block I; 15. a knife rest I; 16. finish milling cutter; 17. driving a first motor; 18. a pointer; 19. a screw motor III; 20. a drive bevel gear; 21. a driven bevel gear; 22. a screw motor II; 23. a second screw rod; 24. a screw rod sliding block II; 25. a support block; 26. a screw rod III; 27. a screw rod sliding block III; 28. a moving block; 29. a support base; 30. a mounting plate; 31. moving the balls; 32. a ball groove; 33. a limiting block; 34. a fixing bolt; 35. a support column; 36. a guide seat; 37. a screw motor I; 38. a screw rod sliding block I; 39. a mounting groove; 40. a center block; 41. supporting the balls; 42. a screw motor IV; 43. a screw rod IV; 44. a screw rod sliding block IV; 45. lifting blocks II; 46. a second tool rest; 47. rough milling cutter; 48. a second driving motor; 49. a claw; 50. an adjustment aperture; 51. a tightening block; 52. a fixed block; 53. a thrust ball bearing; 54. a bump; 55. a mounting ring; 56. a worm wheel; 57. a worm; 58. an adjusting bolt; 59. an adjusting arm; 60. a rack; 61. an adjusting gear; 62. a cleaning brush; 63. adjusting a motor; 64. a rotating shaft; 65. a transmission bevel gear II; 66. a transmission bevel gear III; 67. a drive shaft; 68. a bearing; 69. a transmission bevel gear IV; 70. a servo motor; 71. driving a bevel gear; 72. a buffer mechanism; 73. a fixing ring; 74. a sleeve; 75. a limiting ring; 76. a fixing plate; 77. a buffer plate; 78. a buffer block; 79. a buffer ball; 80. a first guide post; 81. a second guide post; 82. a receiving groove; 83. a first spring; 84. a second spring; 85. and a sliding groove.

Detailed Description

Embodiments of the present invention are described in detail below with reference to fig. 1-11.

The utility model provides a milling flutes device of knitting circular knitting machine cylinder, including frame 1, be provided with the removal seat 4 that can follow frame 1 length direction and remove on the frame 1, remove seat 4 upper portion and be provided with chuck 5, be provided with indexing mechanism between removal seat 4 and the chuck 5, indexing mechanism is used for driving chuck 5 and rotates according to certain angle clearance on removing seat 4, frame 1 right side is equipped with rough milling mechanism, frame 1 side is provided with guide rail 7, guide rail 7 lower part is connected with support column 35, guide rail 7 upper portion intermediate position inlays and is equipped with scale 8, be provided with finish milling mechanism on the guide rail 7, be provided with a plurality of jack-up 49 on the chuck 5, set up regulation hole 50 on the jack-up 49, jack-up 49 upper portion is provided with supports tight piece 51, support tight piece 51 inboard and be connected with fixed block 52, the bolt passes fixed block 52 and screws into in the regulation hole 50.

The needle cylinder is placed on the chuck 5, and the abutting blocks 51 abut against the inner wall of the needle cylinder, so that the needle cylinder is fixed, and the milling groove treatment on the outer wall of the needle cylinder is not affected. The needle cylinder moves to the rough milling mechanism along with the moving seat 4, and the position of the finish milling mechanism is adjusted according to the included angle of the needle groove, so that the rough milling mechanism and the finish milling mechanism are accurately matched to finish the processing of the needle groove. The groove milling stage is divided into a rough milling stage and a finish milling stage, and the single machining amount is reduced, so that the influence of heat generated during machining on the needle groove is reduced, and the machining quality of the needle groove is better.

The inside of the machine base 1 is provided with a first lead screw motor 37, the first lead screw motor 37 is in driving connection with a first lead screw 2, the first lead screw 2 is provided with a first lead screw sliding block 38, the upper end of the first lead screw sliding block 38 is connected with the lower end of the movable base 4, and the first lead screw motor 37 drives the first lead screw 2 to rotate so as to drive the first lead screw sliding block 38 to move left and right, so that the movable base 4 is driven to move along the length direction of the machine base 1. Guide seats 36 are arranged on the left side and the right side of the upper portion of the machine base 1, a guide rod 3 is connected between the two guide seats 36 which are opposite left and right, and the guide rod 3 penetrates through the movable seat 4. The guide rod 3 plays a role of guiding to limit the moving direction of the moving seat 4 so as to ensure the horizontal movement of the moving seat 4.

The rough milling mechanism comprises a frame 6, a screw motor IV 42 is arranged on the upper portion of the frame 6, a screw IV 43 is connected to the lower portion of the screw motor IV 42 in a driving mode, a screw slider IV 44 is arranged on the screw IV 43, a lifting block II 45 is connected to the left side of the screw slider IV 44, a tool rest II 46 is arranged on the left side of the lifting block II 45, a rough milling cutter 47 and a driving motor II 48 are arranged on the tool rest II 46, and belt transmission is adopted between the rough milling cutter 47 and the driving motor II 48. The screw motor IV 42 drives the screw IV 43 to rotate, so that the screw slider IV 44 moves. The second driving motor 48 drives the rough milling cutter 47 to rotate through the cooperation of the belt wheels, and when the second tool rest 46 moves downwards, the rough milling cutter 47 cuts the outer circumferential surface of the needle cylinder to finish rough milling.

The finish milling mechanism comprises a supporting block 25 arranged on a guide rail 7, mounting plates 30 are connected to the left side and the right side of the lower part of the supporting block 25, movable balls 31 are rotatably arranged on the inner sides of the mounting plates 30, ball grooves 32 are formed in the left side and the right side of the guide rail 7, the movable balls 31 are arranged in the ball grooves 32, one mounting plate 30 is in threaded connection with a fixing bolt 34, the inner end of the fixing bolt 34 is connected with a limiting block 33, the inner side surface of the limiting block 33 is identical to the radian of the inner side wall of the ball groove 32, the supporting block 25 can move along the guide rail 7 through the cooperation of the ball grooves 32 and the movable balls 31, the included angle between the finish milling mechanism and the rough milling mechanism is adjusted, and is a multiple of the included angle between needle grooves on a needle cylinder, so that the finish milling mechanism can accurately cut on the grooves generated after the rough milling mechanism cuts, and the needle grooves are machined; the included angle between the finish milling mechanism and the rough milling mechanism is changed, so that the time interval between rough milling and finish milling is changed, and enough heat dissipation time is reserved for the needle groove to cool, so that heat accumulation caused by continuous processing in a short time is avoided, and the processing quality is influenced; the upper part of the supporting block 25 is connected with a screw rod sliding block II 24, a screw rod seat 9 is arranged above the supporting block 25, a screw rod motor II 22 is arranged on the right side of the screw rod seat 9, a screw rod II 23 is connected to the left side of the screw rod motor II 22 in a driving way, the screw rod sliding block II 24 is arranged on the screw rod II 23, a vertical plate 13 is arranged on the left side of the screw rod seat 9, a screw rod III 26 is rotatably arranged in the vertical plate 13, the upper end of the screw rod III 26 penetrates out of the vertical plate 13 and is connected with a driven bevel gear 21, a screw rod motor III 19 is arranged on the upper part of the screw rod seat 9, a driving bevel gear 20 is connected to the driving bevel gear 20 in a driving way, the driving bevel gear 20 is meshed with the driven bevel gear 21, a screw rod sliding block III 27 is arranged on the screw rod III 26, a lifting block I14 is connected to the left side of the screw rod sliding block III 27, a cutter rest I15 is arranged on the left side of the lifting block I14, a finish milling cutter 16 and a driving motor I17 are arranged on the cutter rest I15, and belt transmission is adopted between the finish milling cutter 16 and the driving motor I17; the pointer 18 is arranged on the side face of the supporting block 25, the center line of the pointer 18 and the center line of the finish milling cutter 16 are located on the same straight line, and the angle position of the finish milling cutter 16 can be intuitively known through the pointing of the pointer 18, so that the finish milling cutter 16 is accurately positioned.

A thrust ball bearing 53 is arranged between the movable seat 4 and the chuck 5, the lower ring of the thrust ball bearing 53 is fixed on the movable seat 4, a plurality of convex blocks 54 are arranged at the upper part of the upper ring of the thrust ball bearing 53, the thrust ball bearing 53 plays a supporting role between the movable seat 4 and the chuck 5, the chuck 5 can smoothly rotate above the movable seat 4, a plurality of clamping grooves for embedding the convex blocks 54 are arranged at the lower part of the chuck 5, a mounting groove 39 is arranged in the movable seat 4, an indexing mechanism comprises a mounting ring 55 positioned at the lower part of the chuck 5, the mounting ring 55 is fixed below the chuck 5 through bolts, a worm wheel 56 is connected at the lower part of the mounting ring 55, the worm wheel 56 is positioned in the mounting groove 39, a worm 57 is arranged in the mounting groove 39, teeth are arranged at the periphery of the worm wheel 56, the worm 57 is meshed with the worm wheel 56, the worm 57 is driven by a motor arranged in the mounting groove 39, the worm 57 is matched with the worm wheel 56 to drive the chuck 5 to rotate on the movable seat 4,

the center block 40 is arranged in the middle of the mounting groove 39 in the movable seat 4, a plurality of supporting balls 41 are rotatably arranged on the upper portion of the center block 40, the bottom surface of the chuck 5 is contacted with the supporting balls 41, the middle position of the chuck 5 is supported by the supporting balls 41 on the center block 40, the auxiliary thrust ball bearing 53 is realized, and the pressure of the thrust ball bearing 53 is reduced so as to prolong the service life of the chuck.

The machine seat 1 is provided with a sliding rail 10, the sliding rail 10 is provided with a limiting mechanism 11 in a sliding way, the limiting mechanism 11 comprises a moving block 28, the bottom of the moving block 28 is provided with a sliding groove 85, the sliding rail 10 is positioned in the sliding groove 85, the front side of the moving block 28 is in threaded connection with an adjusting bolt 58, the inner end of the adjusting bolt 58 is rotationally connected with a rotating shaft 64, and the rotating shaft 64 is driven to move back and forth by screwing the adjusting bolt 58, so that the moving block 28 is clamped on the sliding rail 10 to be fixed or loosened, and the position of the limiting mechanism 11 is adjusted; the rear side of the moving block 28 is provided with a supporting seat 29, a rotating shaft 64 is rotatably arranged in the supporting seat 29, an adjusting arm 59 is arranged on the upper portion of the supporting seat 29, a driving shaft 67 is rotationally arranged in the adjusting arm 59, the rear end of the driving shaft 67 penetrates out of the adjusting arm 59 and is connected with a cleaning brush 62, the front end of the driving shaft 67 is positioned in the adjusting arm 59 and is connected with a fourth transmission bevel gear 69, a bearing 68 is arranged at the joint of the driving shaft 67 and the adjusting arm 59, the upper end of the rotating shaft 64 penetrates out of the supporting seat 29 and stretches into the adjusting arm 59 and is connected with a third transmission bevel gear 66, the third transmission bevel gear 66 is meshed with the fourth transmission bevel gear 69, an adjusting motor 63 is arranged on the supporting seat 29, the adjusting motor 63 is in driving connection with an adjusting gear 61, the front side of the adjusting arm 59 is semicircular, a rack 60 is arranged on the surface of the adjusting gear 61 and the rack 60 on the adjusting arm 59, a second transmission bevel gear 65 is connected with the lower end of the rotating shaft 64, a servo motor 70 is arranged at a position below the second transmission bevel gear 65 on the supporting seat 29, the servo motor 70 is in driving connection with a driving bevel gear 71, the right end of the moving seat 4 is provided with a first transmission bevel gear 12, the first transmission bevel gear 12 stretches into the supporting bevel gear 29 and can be meshed with the second transmission bevel gear 71.

The moving seat 4 moves rightwards on the machine base 1 to enable the needle cylinder to reach a processing station, the adjusting motor 63 drives the adjusting gear 61 to rotate, and the adjusting gear 61 can drive the adjusting arm 59 to rotate through matching with the front end teeth of the adjusting arm 59, so that the position of the cleaning brush 62 is changed to enable the cleaning brush to be in contact with the outer wall of the needle cylinder.

The first transmission bevel gear 12 at the right end of the movable seat 4 can extend into the supporting seat 29 and is meshed with the second transmission bevel gear 65 and the second transmission bevel gear 71 respectively, the servo motor 70 drives the second transmission bevel gear 71 to rotate, the second transmission bevel gear 71 drives the rotating shaft 64 to rotate through the transmission of the first transmission bevel gear 12 and the second transmission bevel gear 65, the rotating shaft 64 drives the driving shaft 67 to rotate through the transmission of the third transmission bevel gear 66 and the fourth transmission bevel gear 69, and finally the cleaning brush 62 is driven to rotate, the periphery of the needle cylinder is cleaned through the cleaning brush 62, impurities are removed, and the influence of the impurities on the cutting of the needle cylinder is avoided.

The adjusting arm 59 and the supporting seat 29 are provided with through holes for the rotating shaft 64 to pass through, a sleeve 74 is arranged in the through holes of the adjusting arm 59 and the supporting seat 29, the lower end of the sleeve 74 is connected with a fixed ring 73, the fixed ring 73 is fixed on the top wall of the supporting seat 29 through bolts, a limiting ring 75 is fixed on the upper end of the sleeve 74 through bolts, the outer edge of the limiting ring 75 is positioned above the adjusting arm 59, and the adjusting arm 59 is arranged on the supporting seat 29 and can rotate around the sleeve 74 through the cooperation of the limiting ring 75 and the fixed ring 73.

The buffer mechanism 72 is arranged at a position between the second transmission bevel gear 65 and the drive bevel gear 71 in the support seat 29, and the buffer mechanism 72 is used for playing a buffer role when the first transmission bevel gear 12 stretches into the support seat 29, so that the situation that the second transmission bevel gear 65 and the drive bevel gear 71 cannot be meshed due to the fact that the impact force of the first transmission bevel gear 12 is too large is avoided.

The buffer mechanism 72 comprises a fixed plate 76 fixed on the inner wall of the supporting seat 29, a buffer plate 77 is arranged on the left side of the fixed plate 76, a second spring 84 is connected between the fixed plate 76 and the buffer plate 77, a plurality of second guide posts 81 are connected on the left side of the fixed plate 76, and the second guide posts 81 penetrate through the buffer plate 77. The buffer plate 77 left side is provided with buffer block 78 and is connected with a plurality of first springs 83 between buffer block 78 and the buffer plate 77, and buffer block 78 right side is provided with holding tank 82, and first spring 83 left end is located this holding tank 82, and buffer block 78 right side is connected with guide post one 80, and guide post one 80 passes buffer plate 77 setting, and buffer block 78 left side is provided with buffer ball 79.

The buffer ball 79 first contacts the first transmission bevel gear 12 to perform a first buffer function. The buffer block 78 recompresses the first spring 83, and the first spring 83 serves as a second buffer. After the buffer block 78 abuts against the buffer plate 77, the second spring 84 is pressed, and the second spring 84 plays a third role in buffering. The three buffering combined actions can effectively slow down the impact force of the first transmission bevel gear 12, and the protection effect is achieved.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims

1. The utility model provides a milling flutes device of knitting circular knitting machine cylinder which characterized in that: the automatic milling machine comprises a machine base, wherein a movable seat capable of moving along the length direction of the machine base is arranged on the machine base, a chuck is arranged at the upper part of the movable seat, an indexing mechanism is arranged between the movable seat and the chuck and used for driving the chuck to rotate at a certain angle clearance of the movable seat, a primary milling mechanism is arranged on the right side of the machine base, a guide rail is arranged on the side surface of the machine base, a scale is embedded in the middle position of the upper part of the guide rail, a finish milling mechanism is arranged on the guide rail, a plurality of clamping claws are arranged on the chuck, adjusting holes are formed in the clamping claws, a tight supporting block is arranged at the upper part of the clamping claws, a fixed block is connected to the inner side of the tight supporting block, and a bolt penetrates through the fixed block and is screwed into the adjusting holes;

the primary milling mechanism comprises a frame, a screw motor IV is arranged at the upper part of the frame, a screw rod IV is connected to the lower part of the screw motor IV in a driving way, a screw rod sliding block IV is arranged on the screw rod IV, a lifting block II is connected to the left side of the screw rod sliding block IV, a tool rest II is arranged on the left side of the lifting block II, a primary milling cutter and a driving motor II are arranged on the tool rest II, and belt transmission is adopted between the primary milling cutter and the driving motor II;

the finish milling mechanism comprises a supporting block arranged on a guide rail, the left side and the right side of the lower part of the supporting block are connected with mounting plates, the inner sides of the mounting plates are respectively provided with a movable ball, the left side and the right side of the guide rail are respectively provided with a ball groove, the movable balls are arranged in the ball grooves, one mounting plate is connected with a fixing bolt through threads, and the inner end of the fixing bolt is connected with a limiting block; the upper portion of the supporting block is connected with a screw rod sliding block II, a screw rod seat is arranged above the supporting block, a screw rod motor II is arranged on the right side of the screw rod seat, a screw rod II is connected to the left side of the screw rod motor II in a driving mode, the screw rod sliding block II is arranged on the screw rod II, a vertical plate is arranged on the left side of the screw rod seat, a screw rod III is arranged in the vertical plate in a rotating mode, the upper end of the screw rod III penetrates out of the vertical plate and is connected with a driven bevel gear, a screw rod motor III is arranged on the upper portion of the screw rod seat, a driving bevel gear is connected to the upper portion of the screw rod motor III in a driving mode, the driving bevel gear is meshed with the driven bevel gear, a screw rod sliding block III is arranged on the upper portion of the screw rod III, a lifting block I is connected to the left side of the lifting block I, a finish milling cutter and a driving motor I are arranged on the left side of the lifting block I, and belt transmission is adopted between the finish milling cutter and the driving motor I.

2. The slot milling device for the needle cylinder of the circular knitting machine according to claim 1, wherein: the machine seat is internally provided with a first lead screw motor, the first lead screw motor is connected with a first lead screw in a driving way, a first lead screw sliding block is arranged on the first lead screw, the upper end of the first lead screw sliding block is connected with the lower end of the movable seat, guide seats are arranged on the left side and the right side of the upper portion of the machine seat, a guide rod is connected between the left guide seat and the right guide seat, and the guide rod penetrates through the movable seat.

3. The slot milling device for the needle cylinder of the circular knitting machine according to claim 1, wherein: a thrust ball bearing is arranged between the movable seat and the chuck, a lower ring of the thrust ball bearing is fixed on the movable seat, a plurality of protruding blocks are arranged on the upper portion of an upper ring of the thrust ball bearing, a plurality of clamping grooves for embedding the protruding blocks are formed in the lower portion of the chuck, a mounting groove is formed in the movable seat, the indexing mechanism comprises a mounting ring located at the lower portion of the chuck, a worm wheel is connected to the lower portion of the mounting ring and located in the mounting groove, and a worm is arranged in the mounting groove and meshed with the worm wheel.

4. A slot milling apparatus for a circular knitting machine needle cylinder as claimed in claim 3, characterized in that: the center block is arranged in the middle of the mounting groove in the movable seat, a plurality of supporting balls are arranged on the upper portion of the center block, and the bottom surface of the chuck is contacted with the supporting balls.