A cable processing apparatus and a cable processing method

Abstract

The application provides a cable processing device and a cable processing method, and belongs to the technical field of cable processing. The cable processing device and the cable processing method comprise a stranding cage, a winding drum and a driving device. The winding drum is rotationally arranged on the stranding cage, and the driving device is used for driving the stranding cage to rotate. The cable processing device and the cable processing method further comprise a transmission structure. The transmission structure comprises a gear ring fixed on a base and a rotating shaft horizontally arranged in the stranding cage. The rotating shaft is arranged in parallel with the rotating shaft of the stranding cage, so that the winding drum is actively and synchronously payed out. The problem of excessive stretching, deformation and fracture of metal wires caused by passive traction pay-out is solved, production interruption, material loss and equipment downtime are avoided, and the continuous and stable cable processing is ensured.

Description

Technical Field

[0001] This invention belongs to the field of cable processing technology, specifically relating to a cable processing equipment and a cable processing method. Background Technology

[0002] A power cable is a device for transmitting electrical energy or signals, usually consisting of several or groups of conductors. During the manufacturing process, copper wires of different diameters and shapes are twisted into a cable similar to a rope as needed, which requires the use of a cage twisting device.

[0003] Chinese patent CN120280229B discloses a cable stranding device and method, including a stranding mechanism for winding strands around the outside of a cable. The stranding mechanism is equipped with a clamping mechanism for pressing the strands onto the cable and a grinding mechanism for grinding the strands. The stranding mechanism of this invention can adjust the position of the guide ring by adjusting the rotation of the motor, thereby adjusting the angle and tightness of the strands wound around the cable, and has good adaptability. The grinding mechanism of this invention can fully grind the strands pulled out of the stranding drum, improving the winding quality of the strands. The clamping mechanism of this invention first clamps the strands and cable through the stranding block and the inner slide rod, and then clamps the strands onto the cable a second time through the inclined pressure wheel, with good clamping effect.

[0004] In the aforementioned technical solution, the cable reel's cable release operation typically relies on the pulling force generated by subsequent traction equipment to achieve passive rotation, thereby releasing the wire. However, under actual working conditions, if the front-end traction force is too large, exceeding the tensile strength limit of the wire itself, it can easily cause the wire to be overstretched, deformed, or even break directly. This not only interrupts the normal cable release operation but also causes material loss and equipment downtime. More importantly, the cable reel does not only perform a single rotational motion during operation but also needs to revolve synchronously with the overall equipment, forming a composite motion mode of superimposed rotation and revolution. If the reel's rotation is actively driven by adding a drive device to avoid the risk of wire breakage caused by passive traction, new technical challenges arise: during the reel's revolution, its associated power and signal lines will continuously undergo complex spatial movements with the reel. This can lead to physical entanglement and twisting of the cables, and repeated bending over a long period can cause fatigue fracture. Furthermore, cable entanglement and friction issues can generate signal interference, seriously affecting the stability of electrical transmission and the reliability of equipment control. Summary of the Invention

[0005] The purpose of this invention is to provide a cable processing equipment and a cable processing method, which aims to solve the problem that the cable stranding device drum in the prior art cannot automatically unwind the wire, resulting in the metal wire being prone to breakage.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cable processing device, comprising: a winch, a drum, and a drive device, wherein the drum is rotatably mounted on the winch, and the drive device is used to drive the winch to rotate; the device further comprises: a transmission structure; the transmission structure comprises: a gear ring fixed on a base; a rotating shaft horizontally disposed within the winch, the rotating shaft being parallel to the rotation axis of the winch; a gear mounted on the end of the rotating shaft, the gear meshing with the gear ring; a worm gear disposed on the rotating shaft; and a worm wheel meshing with the worm gear and used to drive the drum to rotate.

[0007] A further technical solution of the present invention includes a fixing structure for fixing the drum to the winch, the fixing structure including: a fixed top block rotatably disposed on the winch; a movable top block, on which a screw is rotatably disposed and threadedly connected to the winch, and a handwheel on the screw; wherein, both the fixed top block and the movable top block have inclined surfaces for abutting against the corners at both ends of the through hole of the drum when tightened.

[0008] A further technical solution of the present invention is that it further includes a speed-changing structure, wherein the fixed top block is connected to the worm gear through the speed-changing structure, and the speed-changing structure is used to adaptively adjust the rotation speed of the drum according to the remaining winding amount of the metal wire on the drum.

[0009] A further technical solution of the present invention is that the speed-changing structure includes: The first conical wheel is fixed to the fixed top block; A second cone wheel is disposed opposite to the first cone wheel, and a gap is formed between the first cone wheel and the second cone wheel; Two steel balls are disposed between the first and second conical wheels, and the steel balls abut against the conical surfaces of the first and second conical wheels; A cage used to hold the steel ball in position; A lever mounted on the winch is rotated; one end of the lever is connected to the cage, and the other end is equipped with a ball. Rotate the rotating rod set on the winch, the rotating rod is equipped with a spiral plate, the spiral plate forms a spiral groove, and the ball is located in the spiral groove; And a stop plate fixedly installed on the rotating rod, the stop plate abutting against the metal wire wound on the drum; When the outer diameter of the metal wire on the drum changes, the abutment drives the rotating rod to rotate, which in turn drives the lever to swing through the spiral plate, thereby changing the contact position of the steel ball between the first and second conical wheels and thus changing the transmission ratio.

[0010] A further technical solution of the present invention is that a pressure plate is provided on the side of the abutment near the drum, and the metal wire passes through the abutment and the pressure plate.

[0011] A further technical solution of the present invention is that a cleaning strip is provided on both the abutment plate and the pressure plate, and the cleaning strip is in contact with the surface of the metal wire that passes through it.

[0012] A further technical solution of the present invention is that support seats are provided at both ends of the winch, and the central hollow shaft of the winch is connected to the support seats; an annular disk is also provided at the bottom of the winch, and rollers for supporting the annular disk are installed on the base.

[0013] A cable processing method includes the following steps: S1. Secure the drum with the metal wire wound around it to the installation position of the winch. S2. Turn on the drive device to drive the winch to rotate; S3. During the revolution of the winch, the revolution of the winch is converted into the rotation of the drum by the transmission structure, driving the drum to actively release the metal wire; S4. During the wire feeding process, the rotation speed of the drum is automatically adjusted by the speed-changing structure according to the change in the outer diameter of the metal wire wound on the drum, so as to maintain a constant wire feeding speed. S5. The released metal wire is introduced into the stranding process to complete the cable processing.

[0014] A further technical solution of the present invention is that step S specifically includes: rotating the handwheel to move the movable top block closer to the fixed top block, and using the inclined surface to press against the corner of the through hole of the drum to complete the fixation.

[0015] A further technical solution of the present invention is that, in step S, the method further includes: during the wire feeding process, using the cleaning strips on the abutment plate and the pressure plate that swing with the change of the outer diameter of the metal wire to clean the surface of the moving metal wire in real time.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. Enables active synchronous wire feeding from the drum, completely solving the problems of excessive stretching, deformation, and breakage of metal wires caused by passive traction wire feeding, avoiding production interruptions, material losses, and equipment downtime, and ensuring continuous and stable cable processing.

[0017] 2. The drum rotation is driven by pure mechanical transmission, eliminating the need for external power or signal cables. This fundamentally prevents cable tangling, twisting, fatigue breakage, and signal interference during drum rotation, significantly improving electrical transmission stability and equipment control reliability.

[0018] 3. The variable speed structure can adaptively and dynamically adjust the speed. As the outer diameter of the wire decreases, the drum speed is automatically increased, and the wire feeding speed is always precisely matched with the front-end pulling speed. This further eliminates the risk of uneven wire stress and breakage, and the wire feeding accuracy far exceeds that of conventional active wire feeding structures.

[0019] 4. Surface cleaning is completed simultaneously during the wire laying process, automatically removing oil, impurities and oxide layers. No additional cleaning station is required, simplifying the processing flow and directly improving the quality of the finished cable.

[0020] 5. Purely mechanical with no external electrical structure and no electromagnetic interference, it is suitable for high-precision signal cable processing scenarios, and can also be compatible with wires of different diameters and materials, significantly improving the equipment's versatility and adaptability. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the fixed structure in a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the mounting structure of the gear ring in a specific embodiment of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the speed-changing structure in a specific embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the cleaning strip in a specific embodiment of the present invention.

[0022] In the diagram: 1. Winch; 2. Drum; 3. Drive unit; 4. Transmission structure; 5. Fixed structure; 6. Speed ​​change structure; 7. Metal wire; 8. Cleaning strip; 11. Support seat; 12. Base; 13. Annular disc; 14. Roller; 41. Gear ring; 42. Rotating shaft; 43. Gear; 44. Worm; 45. Worm wheel; 51. Fixed top block; 52. Movable top block; 53. Screw; 54. Handwheel; 61. First conical wheel; 62. Second conical wheel; 63. Mounting plate; 64. Steel ball; 65. Cage; 66. Lever; 67. Ball; 68. Rotating rod; 681. Spiral plate; 682. Abutment plate; 683. Pressure plate. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-6 The present invention provides the following technical solution: a cable processing equipment, including a winch 1, a drum 2, a drive device 3 and a transmission structure 4.

[0025] The drum 2 is rotatably mounted on the auger 1. A drive device 3 is provided on one side of the auger 1. The drive device 3 can drive the auger 1 to rotate. The transmission structure 4 is mounted on the auger 1 and connected to the drum 2. When the auger 1 rotates, the transmission structure 4 can drive the drum 2 to rotate, thereby enabling the drum 2 to achieve the effect of automatic wire feeding.

[0026] Please see Figure 1 and Figure 2 A fixing structure 5 for fixing the drum 2 to the winch 1 is provided on the winch 1. The fixing structure 5 includes a fixed top block 51 and a movable top block 52. The fixed top block 51 is rotatably mounted on the winch 1. A screw 53 is rotatably mounted on the movable top block 52. The screw 53 is threadedly connected to the winch 1, so that the movable top block 52 can move on the winch 1 in the direction of approaching or moving away from the drum 2. The movable top block 52 can rotate with the drum 2. A handwheel 54 is provided on the screw 53. A through hole is provided in the middle of the drum 2. Both the fixed top block 51 and the movable top block 52 have inclined surfaces. By rotating the handwheel 54, the inclined surface of the movable top block 52 abuts against the corners of both ends of the through hole of the drum 2, thereby realizing the fixed clamping of the drum 2.

[0027] Please see Figure 1 Support seats 11 are provided at both ends of the winch 1. The central hollow shaft at the center of the winch 1 extends out of both ends of the winch 1 and is connected to the support seats 11 on both sides. The drive device 3 is provided on one of the support seats 11. The drive device 3 can drive the central hollow shaft to rotate, and at the same time, the central hollow shaft drives the winch 1 to rotate. A base 12 is provided between the two support seats 11. Annular disks 13 are provided at both ends and in the middle of the winch 1. The base 12 is supported on the annular disks 13. Rollers 14 are installed on the base 12. The rollers 14 abut against the annular disks 13, thereby supporting the entire winch 1 and reducing the stress load on the support seats 11 and the central hollow shaft.

[0028] Please see Figures 2-4The transmission structure 4 includes a gear ring 41 fixed on the base 12. A rotating shaft 42 is horizontally arranged inside the winch 1, parallel to the rotation axis of the winch 1 and passing through both ends of the winch 1. Gears 43 are installed at both ends of the rotating shaft 42, and the gears 43 mesh with the gear ring 41. When the winch 1 rotates, the meshing of the gears 43 and the gear ring 41 causes the gears 43 to rotate, thereby causing the rotating shaft 42 connected to them to rotate. A worm 44 is arranged on the rotating shaft 42, and a worm wheel 45 meshes with one side of the worm 44. The fixed top block 51 is connected to the worm wheel 45 through a speed-changing structure 6. In use, the rotation of the winch 1 causes the gears 43 to rotate around the gear ring 41. The gear 43 revolves around the ring gear 41, and because the gear 43 meshes with the ring gear 41, the gear 43 can also rotate on its own axis while revolving around the ring gear. The rotation of the gear 43 can drive the shaft 42 to rotate, which in turn drives the worm gear 44 to rotate. The worm gear 44 can drive the worm wheel 45 to rotate, and the worm wheel 45 can drive the fixed top block 51 to rotate through the speed change structure 6. Finally, the rotation of the fixed top block 51 drives the drum 2 to rotate, thereby achieving the purpose of automatic unwinding. This avoids the risk of the metal wire 7 breaking due to excessive tension. At the same time, this structure also avoids the situation where the power line and signal line of the drive device 3 will continuously make complex spatial movements with the drum 2, resulting in physical entanglement and twisting of the cables.

[0029] Please see Figure 4 and Figure 5 The speed-changing structure 6 is used to adjust the rotation speed of the drum 2. It can adjust the rotation speed in real time and adaptively according to the remaining winding amount of the metal wire 7 on the drum 2, so that the drum 2 can always maintain a constant winding speed during the winding process. Under normal winding conditions, as the metal wire 7 is continuously pulled out, the outer diameter of the metal wire 7 wound on the drum 2 will continuously decrease. If the rotation speed of the drum 2 remains constant, its actual winding speed will gradually slow down. At this time, the winding speed will gradually lag behind the pulling speed of the front metal wire 7. The metal wire 7 will be overstretched due to excessive tension and uneven force, eventually leading to breakage and damage. Through the dynamic speed regulation of the speed-changing structure 6, the fluctuation of the winding rate caused by the change of the winding diameter of the metal wire 7 can be effectively offset, ensuring that the winding speed and the pulling speed are always matched, fundamentally avoiding the situation where the metal wire 7 breaks due to speed mismatch.

[0030] The transmission structure 6 includes a first conical wheel 61 fixed on a fixed top block 51, and a second conical wheel 62 disposed on one side of the first conical wheel 61. The first conical wheel 61 and the second conical wheel 62 are interchanged, forming a gap between their outer surfaces. The gap width is uniform. A mounting plate 63 is disposed on the winch 1. One end of both the first conical wheel 61 and the second conical wheel 62 rotates on the mounting plate 63, and the other end of the second conical wheel 62 rotates on the winch 1. Two steel balls 64 are disposed between the first conical wheel 61 and the second conical wheel 62. Each steel ball 64 abuts against the conical surface of the first conical wheel 61 and the second conical wheel 62, and the two steel balls 64 are symmetrically arranged, with their plane of symmetry located on the rotation axis of the first conical wheel 61 and the second conical wheel 62. The ball 64 is kept in contact with the first conical wheel 61 and the second conical wheel 62 by the retainer 65. The retainer 65 also applies pressure to the ball 64 against the first and second conical wheels 61 and 62, increasing the friction between the ball 64 and these wheels. Simultaneously, friction surfaces or friction materials can be provided on the surfaces of the first and second conical wheels 61 and 62 to further increase friction with the ball 64 and prevent slippage. A lever 66 is rotatably mounted on the winch 1. One end of the lever 66 is mounted on the retainer 65, and the other end has a ball 67 attached to it. The lever 66 extends laterally through the interior of the retainer 65, allowing the retainer 65 to slide on the lever 66, thus maintaining the ball's position. The frame 65 can move closer to or further away from the first conical wheel 61 and the second conical wheel 62. A rotating rod 68 is rotatably mounted on the winch 1. Two spiral plates 681 are mounted on the rotating rod 68, forming a spiral groove between them. A sphere 67 is located between the two spiral plates 681. A stop plate 682 is fixedly mounted on the rotating rod 68, abutting against the metal wire 7 wound on the drum 2 and always in contact with it. When the drum 2 unwinds the metal wire 7, the remaining amount of metal wire 7 on the drum 2 decreases, and the outer diameter of the metal wire 7 wound on the drum 2 gradually decreases. Because the stop plate 682 always abuts against the surface of the metal wire 7 on the drum 2, as the outer diameter of the metal wire 7 decreases, the stop plate 682 will slowly swing, causing the rotating rod 68... The rotation drives two spiral plates 681 to rotate. The rotation of the spiral plates 681 causes one end of the lever 66 to swing through the ball 67, which in turn causes the other end of the lever 66 to swing the retainer 65. The retainer 65 can drive the steel ball 64 to move between the first conical wheel 61 and the second conical wheel 62, causing the contact point between the steel ball 64 and the first and second conical wheels 61 to change. This causes the steel ball 64 to move towards the larger diameter of the second conical wheel 62, while simultaneously contacting the smaller diameter surface of the first conical wheel 61. Thus, the movement of the steel ball 64 changes the transmission ratio between the first and second conical wheels 61 and the second conical wheel 62, increasing the rotation speed of the drum 2. This keeps the unwinding speed of the metal wire 7 constant, preventing the metal wire 7 from breaking due to speed mismatch.

[0031] Please see Figure 6 A pressure plate 683 is provided on the side of the abutment plate 682 near the drum 2. The pressure plate 683 is located near the side of the drum 2. Cleaning strips 8 are provided on both the pressure plate 683 and the abutment plate 682. The metal wire 7 passes between the two cleaning strips 8 and makes the cleaning strips 8 contact the metal wire 7. When the metal wire 7 moves, the cleaning strips 8 can clean the oil stains, impurities or oxide layer on the surface of the metal wire 7 to improve the production quality of the cable. In addition, since the metal wire 7 is passed between the pressure plate 683 and the abutment plate 682, the abutment plate 682 can adhere to the metal wire 7 wound on the drum 2 through the pull of the metal wire 7, so that the abutment plate 682 can monitor the remaining amount on the drum 2 in real time.

[0032] A cable processing method includes the following steps: S1. Place the drum 2 with the wound metal wire 7 in the installation position of the winch 1, rotate the handwheel 54 of the fixed structure to make the movable top block 52 move closer to the fixed top block 51, and press the inclined surface against the corner of the through hole of the drum 2 to complete the positioning and clamping of the drum 2.

[0033] S2. Activate the drive device 3 to drive the central hollow shaft of the winch 1 to rotate, causing the entire winch 1 to make a stable revolution along the support base 11.

[0034] S3. When the winch 1 revolves, the gear 43 of the transmission structure 4 meshes with the fixed gear ring 41 and rotates. Through the worm 44 and worm wheel 45, the speed change structure 6 is driven to operate, which in turn drives the drum 2 to rotate synchronously, so as to realize the active unwinding of the metal wire 7.

[0035] S4. During the unwinding process of the drum 2, the abutment plate 682 always adheres to the surface of the metal wire 7. As the outer diameter of the metal wire 7 decreases during winding, the linkage rod 68 rotates, which drives the steel ball 64 to move through the lever 66, changing the transmission ratio of the speed change structure 6, automatically increasing the speed of the drum 2, and maintaining a constant unwinding speed.

[0036] S5. After the metal wire 7 is released from the drum 2, it passes through the cleaning strip 8 between the pressure plate 683 and the abutment plate 682. The cleaning strip 8 wipes and removes oil, impurities and oxide layer from the surface of the metal wire 7 in real time.

[0037] S6. The cleaned metal wire 7 continues to revolve with the winch 1, and the multiple strands of metal wire 7 are twisted together according to the process requirements to form the cable core structure.

[0038] S7. After the cable processing is completed, turn off the drive device 3. After the winch 1 and drum 2 have completely stopped running, loosen the fixing structure 5, remove the empty drum 2, replace it with a new drum 2, and then restart the processing.

Claims

1. A cable processing equipment, comprising: The winch (1), drum (2) and drive device (3) are characterized in that the drum (2) is rotatably mounted on the winch (1) and the drive device (3) is used to drive the winch (1) to rotate. The winch (1) is characterized in that it further includes a transmission structure (4). The transmission structure (4) includes: a gear ring (41) fixed on the base (12); A rotating shaft (42) is horizontally arranged inside the winch (1), and the rotating shaft (42) is parallel to the rotation axis of the winch (1); A gear (43) is installed at the end of the shaft (42), and the gear (43) meshes with the gear ring (41); A worm (44) is mounted on the shaft (42); and a worm wheel (45) meshes with the worm (44) and drives the drum (2) to rotate.

2. The cable processing equipment according to claim 1, characterized in that: It also includes a fixing structure (5) for fixing the drum (2) to the winch (1), the fixing structure (5) comprising: Rotate the fixed top block (51) set on the winch (1); The movable top block (52) has a screw (53) rotatably mounted on it and threadedly connected to the winch (1), and a handwheel (54) on the screw (53). The fixed top block (51) and the movable top block (52) both have inclined surfaces, which are used to press against the corners of the two ends of the through hole of the drum (2) when tightened.

3. The cable processing equipment according to claim 2, characterized in that: It also includes a speed-changing structure (6), the fixed top block (51) is connected to the worm gear (45) through the speed-changing structure (6), and the speed-changing structure (6) is used to adaptively adjust the rotation speed of the drum (2) according to the remaining winding amount of the wire (7) on the drum (2).

4. The cable processing equipment according to claim 3, characterized in that: The speed-changing structure (6) includes: The first conical wheel (61) is fixed on the fixed top block (51); A second cone wheel (62) is disposed opposite to the first cone wheel (61), and a gap is formed between the first cone wheel (61) and the second cone wheel (62); Two steel balls (64) are disposed between the first conical wheel (61) and the second conical wheel (62), and the steel balls (64) abut against the conical surfaces of the first conical wheel (61) and the second conical wheel (62); A retainer (65) for holding the position of the steel ball (64); Rotate the lever (66) set on the winch (1). One end of the lever (66) is connected to the cage (65), and the other end is provided with a ball (67). Rotate the rotating rod (68) set on the winch (1), the rotating rod (68) is provided with a spiral plate (681), the spiral plate (681) forms a spiral groove, and the ball (67) is located in the spiral groove; And a stop plate (682) fixedly installed on the rotating rod (68), the stop plate (682) abutting against the metal wire (7) wound on the drum (2); When the outer diameter of the metal wire (7) on the drum (2) changes, the abutment (682) drives the rotating rod (68) to rotate, and drives the lever (66) to swing through the spiral plate (681) to change the contact position of the steel ball (64) between the first cone wheel (61) and the second cone wheel (62), thereby changing the transmission ratio.

5. The cable processing equipment according to claim 4, characterized in that: The abutment (682) is provided with a pressure plate (683) on the side near the drum (2), and the metal wire (7) passes between the abutment (682) and the pressure plate (683).

6. The cable processing equipment according to claim 5, characterized in that: Cleaning strips (8) are provided on both the abutment plate (682) and the pressure plate (683), and the cleaning strips (8) are in contact with the surface of the metal wire (7) that passes through them.

7. The cable processing equipment according to claim 1, characterized in that: The winch (1) is provided with support seats (11) at both ends, and the central hollow shaft of the winch (1) is connected to the support seats (11); the bottom of the winch (1) is also provided with an annular disk (13), and the base (12) is equipped with rollers (14) for supporting the annular disk (13).

8. A cable processing method, characterized in that: The cable processing equipment as described in claim 7 is used, comprising the following steps: S1. The drum (2) with the metal wire (7) wound around it is clamped and fixed to the installation position of the winch (1); S2. Turn on the drive device (3) to drive the winch (1) to revolve; S3. During the revolution of the winch (1), the revolution of the winch (1) is converted into the rotation of the drum (2) by the transmission structure (4), and the drum (2) is driven to actively release the metal wire (7). S4. During the wire feeding process, the rotation speed of the drum (2) is automatically adjusted by the speed change structure (6) according to the change of the outer diameter of the metal wire (7) wound on the drum (2) to keep the wire feeding speed constant. S5. The released metal wire (7) is introduced into the stranding process to complete the cable processing.

9. A cable processing method according to claim 8, characterized in that: The specific steps of step S1 include: rotating the handwheel (54) to move the movable top block (52) closer to the fixed top block (51), and using the inclined surface to press against the corner of the through hole of the drum (2) to complete the fixation.

10. A cable processing method according to claim 8, characterized in that: In step S4, the method further includes: during the wire feeding process, cleaning strips (8) on the abutment plate (682) and pressure plate (683) that swing with the change of the outer diameter of the wire (7) are used to clean the surface of the moving wire (7) in real time.

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