A precision forming device for sewing machine needle bar

Abstract

The present application relates to sewing machine needle bar processing technical field, specifically, a kind of precision forming processing device of sewing machine needle bar, it includes machine body, fixture is installed on machine body, fixture is used to clamp sewing machine needle bar, fixture rotatably installed on machine body, linear module is installed on machine body, movable linear slide is provided on linear module, and the side of linear slide is fixed with bar one;Polishing assembly is provided on the machine body, and polishing assembly includes two polishing wheels, the number of two polishing wheels is different, overturning assembly is provided on the machine body, and overturning assembly is used to exchange the position of two polishing wheels, guide assembly is provided on the machine body.The automatic switching of the present application through coarse polishing wheel and fine polishing wheel is matched with the high-speed rotation of needle bar, and coarse polishing and fine polishing operations of sewing machine needle bar can be sequentially completed in single linear movement process, without manual replacement of polishing wheel or re-clamping workpiece, the efficiency and continuity of polishing processing are improved.

Description

Technical Field

[0001] This invention relates to the field of sewing machine needle bar processing technology, and more specifically, to a precision forming processing device for sewing machine needle bars. Background Technology

[0002] Polishing of sewing machine needle bars is a precision finishing process performed on the outer surface, stepped transition areas, and mounting mating surfaces of sewing machine needle bars. It removes tool marks, burrs, and micro-defects remaining from previous processing such as turning and grinding by using flexible abrasives, polishing wheels, grinding media, or chemical-mechanical composite treatments.

[0003] During the process of rough polishing and fine polishing of sewing machine needle bars, since the two processes are completed on two separate machines and require manual transfer and clamping, the workload of the workers is increased. Manual transfer and repeated clamping can easily introduce positioning deviations, which can damage the dimensional and positional accuracy of the needle bar after rough polishing, thereby affecting the surface quality and consistency of the final fine polishing. At the same time, manual transfer and clamping will lengthen the overall processing cycle and reduce the efficiency of continuous processing.

[0004] Based on this, the present invention discloses a precision forming and processing device for sewing machine needle bars. Summary of the Invention

[0005] To address the problem of repeated clamping required during needle bar polishing as mentioned in the background art, this invention provides a precision forming processing device for sewing machine needle bars, comprising a machine body, a clamp mounted on the machine body for clamping sewing machine needle bars, the clamp being rotatably mounted on the machine body, a linear module mounted on the machine body, a movable linear slide on the linear module, and a rod fixed to the side of the linear slide; The machine body is equipped with a polishing assembly, which includes two polishing wheels with different grit numbers. The machine body is also equipped with a flipping assembly for swapping the positions of the two polishing wheels. A guide assembly is also provided on the machine body.

[0006] As a preferred embodiment of the present invention, the polishing assembly includes a bracket and a top plate. The top plate is fixed to the end of the rod away from the linear slide. The bracket is located below the top plate. A rotating shaft is rotatably mounted on the bottom surface of the top plate. The end of the rotating shaft away from the top plate is connected to the bracket. An opening is provided on the rotating shaft. A gear is fixedly sleeved on the rotating shaft. Two motors are mounted on the bracket. The two polishing wheels are respectively fixed to the output shafts of the two motors. The top plate is provided with a positioning component, which is used to provide positioning for the rotating shaft.

[0007] As a preferred embodiment of the present invention, in the initial state, one of the polishing wheels is in contact with the sewing machine needle bar.

[0008] As a preferred embodiment of the present invention, the positioning component includes a side plate, which is fixed to the side of the top plate. The side plate has a through-hole, and a locking rod is slidably disposed in the through-hole, with the locking rod facing the through-hole. A first magnetic block is fixed to the end of the locking rod away from the rotating shaft, and the first magnetic block is connected to the side plate by a spring.

[0009] As a preferred embodiment of the present invention, when the clamp is inserted into the through-hole, the outer surface of the clamp is in contact with the inner wall of the through-hole.

[0010] As a preferred embodiment of the present invention, the flipping assembly includes two rods 2, both rods 2 are fixed to the machine body, and a first guide rail is fixed to the end of each rod 2. A first slide block is slidably disposed on each first guide rail, and a rod 3 is fixed to the top surface of each first slide block. A second slide rail is fixed together on the two rods 3. The flipping assembly also includes a rod 4, which is fixed to the side of the second slide rail. A rack is fixed to the end of the rod 4 away from the second slide rail. The second slide rail is equipped with a magnetic attraction component.

[0011] As a preferred embodiment of the present invention, the magnetic suction assembly is used to control the position of the lever. The magnetic suction assembly includes a second slide block, which is slidably disposed on a second slide rail. A second magnetic block is fixed to the side of the second slide block, and the second slide block is connected to the second slide rail by a tension spring.

[0012] As a preferred embodiment of the present invention, the guide assembly includes two rods, which are respectively connected to two first slides. Each end of the two rods is fixed with a guide plate, and each guide plate is provided with an inclined surface.

[0013] As a preferred embodiment of the present invention, when the linear slide moves to one end of the linear module, the top plate contacts the inclined surface of one of the guide plates, and when the linear slide moves to the other end of the linear module, the top plate contacts the inclined surface of the other guide plate.

[0014] As a preferred embodiment of the present invention, the machine body is provided with a damping assembly, the damping assembly includes a cylinder and a rod, the cylinder is fixed inside the machine body, the rod is slidably disposed inside the cylinder, one end of the rod extends to the outside of the cylinder and is connected to the second slide rail, the outer surface of the rod is in contact with the inner wall of the cylinder, and the rod is a metal rod with a rubber-coated surface.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This device automatically switches between coarse and fine polishing wheels in conjunction with the high-speed rotation of the needle bar. It can sequentially complete the coarse and fine polishing operations of the sewing machine needle bar in a single linear movement without the need for manual replacement of polishing wheels or re-clamping of workpieces, thus improving the efficiency and continuity of the polishing process.

[0016] 2. The locking lever, rotating shaft, and through-hole cooperate to form a reliable positioning and locking structure. During polishing operations, it can firmly restrict the rotation of the rotating shaft and the bracket, preventing the polishing wheel from shaking or shifting during processing, and ensuring that the polishing position is accurate and stable. When it is necessary to switch polishing wheels, the locking lever can automatically disengage from the through-hole under magnetic attraction to release the constraint. After the switch is completed, it can automatically reset and lock.

[0017] 3. The damping component provides stable damping for the second slide rail and rack through the friction between the cylinder and the rubber rod. The rack only moves when the top plate is in contact with the guide plate and is subjected to force. In other states, the rack remains stationary. It can precisely control the meshing time of the gear and rack, ensuring that the polishing wheel only completes a 180° rotation and swap at the designated position, effectively preventing gear idling or switching errors caused by the rack moving erroneously. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a structural diagram of the polishing component; Figure 4 This is a schematic diagram of the flip component. Figure 5 A schematic diagram of the structure of two first slide rails, a second slide rail, and a rack; Figure 6 This is a schematic diagram of the damping component.

[0019] The meanings of the labels in the diagram are as follows: 1. Body; 2. Fixture; 3. Linear module; 31. Linear slide; 311. Rod 1; 41. Bracket; 42. Motor; 43. Polishing wheel; 44. Top plate; 441. Side plate; 442. Locking rod; 443. First magnet; 444. Spring; 45. Rotating shaft; 451. Through port; 46. Gear; 51. Rod 2; 52. First guide rail; 53. First slide; 54. Rod 3; 55. Second slide rail; 551. Second slide; 552. Second magnet; 553. Tension spring; 56. Rod 4; 57. Rack; 61. Rod 5; 62. Guide plate; 71. Cylinder; 72. Rod body. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Therefore, the present invention provides a precision forming and processing device for sewing machine needle bars, see [link to device]. Figure 1-6 As shown, it includes a body 1, on which a clamp 2 is mounted. The clamp 2 is used to clamp the sewing machine needle bar. The clamp 2 is rotatably mounted on the body 1. The body 1 is provided with a drive module for driving the clamp 2 to rotate. When the drive module is running, the clamp 2 drives the sewing machine needle bar to rotate at high speed. The specific structure and working principle of the drive module are existing technologies and are not shown in the figure. They will not be described in detail here. A linear module 3 is mounted on the body 1. A movable linear slide 31 is provided on the linear module 3. When the linear module 3 is running, the linear slide 31 moves linearly along the linear module 3. A rod 311 is fixed to the side of the linear slide 31.

[0022] The machine body 1 is equipped with a polishing assembly, which includes a bracket 41 and a top plate 44. The top plate 44 is fixed to the end of the rod 311 away from the linear slide 31. The bracket 41 is located below the top plate 44. A rotating shaft 45 is rotatably mounted on the bottom surface of the top plate 44. The end of the rotating shaft 45 away from the top plate 44 is connected to the bracket 41. A through-hole 451 is opened on the rotating shaft 45, and a gear 46 is fixedly sleeved on the rotating shaft 45. Two motors 42 are mounted on the bracket 41. Each motor 42 has a polishing wheel 43 on its output shaft. The two polishing wheels 43 have different grit numbers. One polishing wheel 43 is a coarse polishing wheel, and the other polishing wheel 43 is a fine polishing wheel. In the initial state, one of the polishing wheels 43 is connected to the sewing machine. The needle bar contacts the top plate 44, which is equipped with a positioning component. The positioning component is used to position the rotating shaft 45. The positioning component includes a side plate 441, which is fixed to the side of the top plate 44. The side plate 441 has a through hole, and a locking rod 442 is slidably arranged in the through hole. The locking rod 442 is positioned directly opposite the through hole 451. In the initial state, the locking rod 442 is inserted into the through hole 451. At this time, the locking rod 442 provides a limit to the rotating shaft 45, so that the rotating shaft 45 cannot rotate. A first magnetic block 443 is fixed to the end of the locking rod 442 away from the rotating shaft 45. The first magnetic block 443 is connected to the side plate 441 through a spring 444. Under the action of the spring 444, the first magnetic block 443 always tends to move closer to the side plate 441.

[0023] The machine body 1 is equipped with a flipping assembly for changing the positions of the two polishing wheels 43. The flipping assembly includes two rods 51, both of which are fixed to the machine body 1. A first guide rail 52 is fixed to the end of each rod 51. A first slide block 53 is slidably mounted on each first guide rail 52. A rod 54 is fixed to the top surface of each first slide block 53. A second slide rail 55 is fixed to both rods 54. A magnetic attraction assembly is provided on the second slide rail 55 for controlling the position of the locking lever 442. The magnetic attraction assembly includes a second slide block 551, which is slidably mounted on the second slide rail 55. A second magnet 552 is fixed to the side of the second slide block 551. The second slide block 551 is connected to the second slide rail 55 via a tension spring 553. In the initial state, the second slide block 551 is located at one end of the second slide rail 55. The magnetic poles of the second magnetic block 552 and the first magnetic block 443 are opposite poles. When the first magnetic block 443 moves to a position directly opposite the second magnetic block 552, according to the principle of opposite poles attracting each other, the first magnetic block 443 will move towards the direction closer to the second magnetic block 552 and finally be attracted to the second magnetic block 552. When the first magnetic block 443 moves, the locking rod 442 moves accordingly. The flipping assembly also includes a fourth rod 56, which is fixed to the side of the second slide rail 55. A rack 57 is fixed to the end of the fourth rod 56 away from the second slide rail 55. During the movement, the gear 46 will mesh with the rack 57 and rotate under the action of the rack 57. During the meshing process of the gear 46 and the rack 57, the gear 46 rotates exactly 180 degrees, thereby realizing the swapping of the positions of the two polishing wheels 43.

[0024] The body 1 is equipped with a guide assembly, which includes two rods 61. The two rods 61 are respectively connected to two first slides 53. The ends of the two rods 61 are fixed with guide plates 62. Each guide plate 62 is provided with an inclined surface. When the linear slide 31 moves to one end of the linear module 3, the top plate 44 contacts the inclined surface of one of the guide plates 62. When the linear slide 31 moves to the other end of the linear module 3, the top plate 44 contacts the inclined surface of the other guide plate 62.

[0025] The body 1 is equipped with a damping assembly, which includes a cylinder 71 and a rod 72. The cylinder 71 is fixed inside the body 1, and the rod 72 is slidably disposed inside the cylinder 71. One end of the rod 72 extends to the outside of the cylinder 71 and is connected to the second slide rail 55. The outer surface of the rod 72 is in contact with the inner wall of the cylinder 71, and the rod 72 is a metal rod with a rubber-coated surface. There is a preset friction between the cylinder 71 and the rod 72. This friction can provide damping for the second slide rail 55 and the rack 57. The second slide rail 55 and the rack 57 will only move when the top plate 44 contacts the guide plate 62. Otherwise, the second slide rail 55 and the rack 57 remain stationary.

[0026] Working principle: When using the sewing machine needle bar polishing device proposed in this invention, the operator clamps the needle bar onto the clamp 2, starts the drive module on the machine body 1, causing the clamp 2 to drive the needle bar to rotate at high speed. Simultaneously, the two motors 42 and the linear module 3 are activated. When the two motors 42 are running, they drive the two polishing wheels 43 to rotate. Figure 1 As shown, in the initial state, the small-mesh polishing wheel 43 is in contact with the needle bar, and the rotation direction of the polishing wheel 43 is opposite to the rotation direction of the needle bar. When the linear module 3 operates, it drives the linear slide 31 to move. When the linear slide 31 moves, it drives the two motors 42 to move through the rod 311, the top plate 44, the rotating shaft 45, and the bracket 41. During this process, the small-mesh polishing wheel 43 performs coarse polishing on the needle bar. After the polishing wheel 43 separates from the needle bar, the first magnetic block 443 moves to the position directly opposite the second magnetic block 552. At this time, the first magnetic block 443 will be on the second The first magnetic block 443 moves under the attraction of the magnetic block 552 and is attracted to the second magnetic block 552. When the first magnetic block 443 moves, it drives the locking rod 442 to move, so that the locking rod 442 is disengaged from the through 451. Without the constraint of the locking rod 442, the rotating shaft 45 and the bracket 41 can rotate freely, which makes it easy to exchange the positions of the two polishing wheels 43. Then the first magnetic block 443 can drive the second magnetic block 552 to move. During the movement of the second magnetic block 552, the second slide rail 55 and the second slide block 551 provide limits for it, ensuring the stability of the second magnetic block 552 during the movement.

[0027] As the two motors 42 move, the gear 46 on the rotating shaft 45 meshes with the rack 57 and rotates under the action of the rack 57. When the rotating shaft 45 rotates, it drives the bracket 41 to rotate. During the meshing process of the gear 46 and the rack 57, the gear 46 rotates exactly 180°, thereby realizing the interchange of the positions of the two polishing wheels 43. When the second slide 551 moves to its limit position, the second slide 551 and the second magnetic block 552 can no longer move, but the first magnetic block 443 continues to move. This causes the first magnetic block 443 and the second magnetic block 552 to separate from each other. After the two separate, the first magnetic block 443 is reset under the action of the spring 444, thereby making the card... When lever 442 resets, it re-inserts into port 451, providing a limit for the rotating shaft 45, preventing it from rotating and thus fixing the positions of the two polishing wheels 43 to avoid wobbling during polishing. Subsequently, after gear 46 and rack 57 separate, top plate 44 contacts the inclined surface of one of the guide plates 62 and presses it. Under the action of the inclined surface, guide plate 62 can move when pushed, and drives the first slide block 53 to move through lever 51. When the first slide block 53 moves, it drives the second slide rail 55 to move. When the second slide rail 55 moves, it drives the rack 57 to move through lever 46.

[0028] Furthermore, the linear slide 31 moves in the reverse direction, causing the two polishing wheels 43 to move in the reverse direction. Since the rack 57 and the second slide rail 55 have already moved, the gear 46 will not mesh with the rack 57 during the reverse movement, that is, the gear 46 will not rotate. The second magnetic block 552 moves with the second slide rail 55. Therefore, during the reverse movement of the first magnetic block 443, when the first magnetic block 443 moves to a position directly opposite the second magnetic block 552, the distance between the first magnetic block 443 and the second magnetic block 552 is large enough to prevent the first magnetic block 443 from being subjected to [unspecified force]. Due to the magnetic force of the second magnetic block 552, the clamp 442 will not move out of the through 451. Since the positions of the two polishing wheels 43 have been swapped, the larger mesh polishing wheel 43 will perform fine polishing on the needle bar during the reverse movement of the two polishing wheels 43. When the two polishing wheels 43 move to the initial position, the top plate 44 will press the inclined surface of the other guide plate 62, causing the guide plate 62 to drive the second slide rail 55 and the rack 57 to reset until the second slide rail 55 and the rack 57 are reset to the initial position, completing a complete polishing cycle.

[0029] In summary, the needle bar polishing device proposed in this invention can first perform rough polishing on the needle bar, and then perform fine polishing on the needle bar. The whole process is automated, eliminating the need for repeated clamping of the needle bar, making it convenient to operate and improving efficiency.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision forming and processing device for a sewing machine needle bar, characterized in that: It includes a body (1), on which a clamp (2) is installed. The clamp (2) is used to clamp the sewing machine needle bar. The clamp (2) is rotatably installed on the body (1). A linear module (3) is installed on the body (1). A movable linear slide (31) is provided on the linear module (3). A rod (311) is fixed on the side of the linear slide (31). The machine body (1) is provided with a polishing assembly, which includes two polishing wheels (43) with different mesh counts. The machine body (1) is provided with a flipping assembly, which is used to switch the positions of the two polishing wheels (43). The machine body (1) is provided with a guide assembly.

2. The precision forming and processing device for sewing machine needle bar according to claim 1, characterized in that: The polishing assembly includes a bracket (41) and a top plate (44). The top plate (44) is fixed to one end of the rod (311) away from the linear slide (31). The bracket (41) is located below the top plate (44). A rotating shaft (45) is rotatably mounted on the bottom surface of the top plate (44). One end of the rotating shaft (45) away from the top plate (44) is connected to the bracket (41). A through-hole (451) is opened on the rotating shaft (45). A gear (46) is fixedly sleeved on the rotating shaft (45). Two motors (42) are mounted on the bracket (41). The two polishing wheels (43) are respectively fixed to the output shafts of the two motors (42). The top plate (44) is provided with a positioning component, which is used to provide positioning for the rotating shaft (45).

3. The precision forming and processing device for sewing machine needle bar according to claim 2, characterized in that: In the initial state, one of the polishing wheels (43) is in contact with the sewing machine needle bar.

4. The precision forming and processing device for sewing machine needle bar according to claim 2, characterized in that: The positioning component includes a side plate (441), which is fixed to the side of the top plate (44). The side plate (441) has an opening, and a locking rod (442) is slidably disposed in the opening. The locking rod (442) is positioned opposite the through-hole (451). A first magnetic block (443) is fixed to one end of the locking rod (442) away from the rotating shaft (45). The first magnetic block (443) is connected to the side plate (441) by a spring (444).

5. The precision forming and processing device for sewing machine needle bar according to claim 4, characterized in that: When the lever (442) is inserted into the opening (451), the outer surface of the lever (442) is in contact with the inner wall of the opening (451).

6. The precision forming and processing device for sewing machine needle bar according to claim 4, characterized in that: The flipping assembly includes two rods (51), both rods (51) are fixed on the body (1), and the ends of the two rods (51) are fixed with a first guide rail (52). A first slide block (53) is slidably arranged on each first guide rail (52), and a rod (54) is fixed on the top surface of each first slide block (53). A second slide rail (55) is fixed on both rods (54). The flipping assembly also includes a rod (56), which is fixed to the side of the second slide rail (55). A rack (57) is fixed to the end of the rod (56) away from the second slide rail (55). The second slide rail (55) is provided with a magnetic suction component.

7. The precision forming and processing device for sewing machine needle bar according to claim 6, characterized in that: The magnetic suction assembly is used to control the position of the lever (442). The magnetic suction assembly includes a second slide (551), which is slidably mounted on a second slide rail (55). A second magnet (552) is fixed to the side of the second slide (551), and the second slide (551) is connected to the second slide rail (55) by a tension spring (553).

8. The precision forming and processing device for sewing machine needle bar according to claim 6, characterized in that: The guide assembly includes two rods (61), which are respectively connected to two first slides (53). The ends of the two rods (61) are fixed with guide plates (62), and each guide plate (62) is provided with an inclined surface.

9. The precision forming and processing device for sewing machine needle bar according to claim 8, characterized in that: When the linear slide (31) moves to one end of the linear module (3), the top plate (44) contacts the inclined surface of one of the guide plates (62), and when the linear slide (31) moves to the other end of the linear module (3), the top plate (44) contacts the inclined surface of the other guide plate (62).

10. The precision forming and processing device for sewing machine needle bar according to claim 6, characterized in that: The body (1) is provided with a damping assembly, which includes a cylinder (71) and a rod (72). The cylinder (71) is fixed inside the body (1), and the rod (72) is slidably disposed inside the cylinder (71). One end of the rod (72) extends to the outside of the cylinder (71) and is connected to the second slide rail (55). The outer surface of the rod (72) is in contact with the inner wall of the cylinder (71), and the rod (72) is a metal rod with a rubber-coated surface.

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