Tension buffering machine and wire rewinding production line

Abstract

The utility model provides a tension buffering machine and a wire rewinding production line, and belongs to the field of wire winding devices. The tension buffering machine comprises a rack, a fixed guide wheel and a tension wheel, the rack is further provided with a wire pressing mechanism, the wire pressing mechanism comprises a wire pressing guide wheel and a guide structure, the wire pressing guide wheel and the fixed guide wheel can press the wire from the two sides of the wire, and a gap is reserved between the pressing position of the wire pressing guide wheel on the wire and the pressing position of the fixed guide wheel on the wire. The wire rewinding production line comprises the tension buffering machine. According to the tension buffering machine, the mechanism which can be matched with the fixed guide wheel to press the wire from the two sides of the wire is additionally arranged on the tension buffering machine, so that the wire can be tightened without being wound between the fixed guide wheel and the tension wheel in a reciprocating manner, and the universality of the tension buffering machine is improved.

Description

Technical Field

[0001] This utility model belongs to the field of wire winding equipment, and in particular relates to tension buffer machines and wire rewinding production lines. Background Technology

[0002] Metal wires undergo various processes, including unwinding, processing, and winding, in different manufacturing steps. Maintaining stable tension on the production line is crucial for achieving this. Therefore, tension buffers are installed on the production line to achieve this.

[0003] The constant tension device disclosed in Chinese utility model patent with authorization announcement number CN210788655U is a tension buffer machine. The constant tension device includes a frame, a fixed guide wheel and a tension wheel. The fixed guide wheel is fixed in position relative to the frame, and the tension wheel can move relative to the frame. After the wire enters the frame, it first passes around the fixed guide wheel, then around the tension wheel, and finally passes around the fixed guide wheel again before exiting the frame. A swing arm that can swing is provided on the frame, and the tension wheel is installed on the swing arm. The tension wheel tensions the wire by its own weight.

[0004] Because the wire needs to be repeatedly wound between the guide roller and the tension roller, it needs to have good flexibility to adapt to the bending deformation during the winding process. However, for some stiffer, less flexible wires (such as titanium alloy wires with a diameter greater than 4.2mm), they obviously cannot be wound smoothly in the tension buffer machine, requiring a separate large-scale dedicated buffer machine for buffering and tensioning. To save on investment costs, some production lines need to be able to produce both thinner, more flexible wires and thicker, less flexible wires. When the type of wire produced changes, it is often necessary to disassemble and replace the tension buffer machine on the production line, which consumes more time, affects production efficiency, and also increases production costs. Utility Model Content

[0005] One of the objectives of this utility model is to provide a tension buffer machine to solve the technical problem that the existing tension buffer machine cannot be compatible with the processing of thinner, more flexible wires and thicker, less flexible wires, resulting in the need to replace the tension buffer machine when switching wire types, which is inefficient and costly.

[0006] Another objective of this invention is to provide a wire rewinding production line to solve the aforementioned technical problems.

[0007] To achieve the above objectives, the technical solution of the tension buffer machine provided by this utility model is as follows:

[0008] The tension buffer machine includes a frame, a fixed guide wheel, and a tension wheel. The fixed guide wheel is mounted on the frame, and a swing arm that can swing around a pivot is provided on the frame. The tension wheel is mounted on the swing arm and can move closer to or away from the fixed guide wheel as the swing arm swings. The frame also has a wire pressing mechanism, which includes a swing arm that is hinged to the frame and a wire pressing guide wheel mounted on the swing arm for pressing the wire. The wire pressing guide wheel can switch between a pressing position that can press the wire and a disengaging position that can detach the wire under the drive of the swing arm. The wire pressing guide wheel and the fixed guide wheel can press the wire from both sides, and there is a gap between the pressing position of the wire pressing guide wheel and the pressing position of the fixed guide wheel.

[0009] As a further improvement, the fixed guide wheel is located on the inside of the frame, and the wire pressing mechanism is located on the outside of the frame.

[0010] As a further improvement, the wire pressing position of the wire pressing guide wheel is located below the disengagement position, so that the wire pressing guide wheel can press the wire downward.

[0011] As a further improvement, the swing arm includes a root section that connects to the frame and a mounting section for mounting the wire guide rollers. The root section and the mounting section are set at an angle, and the swing arm as a whole has an L-shaped structure.

[0012] As a further improvement, the length of the root segment is less than or equal to the length of the mounting segment.

[0013] As a further improvement, the length of the root section is less than or equal to the distance from the hinge position of the swing arm to the wire inlet on the frame.

[0014] As a further improvement, a wire breakage detection proximity switch is installed on the frame. After the wire pressing guide wheel moves from the wire pressing position to a direction away from the disengagement position, the swing arm can approach and trigger the wire breakage detection proximity switch.

[0015] As a further improvement, the tension buffer also includes a speed detection structure for detecting the rotational speed of the guide wheel. The speed detection structure can feed back the detection signal to the frequency converter of the take-up machine in the wire rewinding production line so that the take-up machine can adjust the take-up speed of the wire according to the rotational speed of the guide wheel.

[0016] As a further improvement, the speed detection structure includes a measuring ring and a speed detection proximity switch. The measuring ring is fixed coaxially with the guide wheel and rotates with the guide wheel. Toothed structures are arranged at intervals along the circumference of the outer edge of the measuring ring, and gaps are formed between adjacent toothed structures. The speed detection proximity switch is mounted on the frame and is used to detect the alternation period of the toothed structures and gaps when the measuring ring rotates.

[0017] The beneficial effects are as follows: The tension buffer machine provided by this utility model is an improvement on the existing technology. By adding a wire-pressing mechanism, when processing thicker, less flexible wires, the wire-pressing guide wheel moves to the pressing position, thereby using the cooperation of the wire-pressing guide wheel and the fixed guide wheel to press the wire; when processing thinner, more flexible wires, the fixed guide wheel cooperates with the tension wheel to tension the wire, and the wire-pressing guide wheel moves upward to the disengagement position to avoid interfering with the wire. Through this method, the same production line can produce different types of wires without changing equipment, thereby improving the versatility of the production line, increasing the efficiency of preparation work when producing different types of wires, and reducing preparation costs.

[0018] To achieve the above objectives, the technical solution of the wire rewinding production line provided by this utility model is as follows:

[0019] The wire rewinding production line includes a wire feeding machine, a wire taking machine, wire processing equipment, and a tension buffer machine. The tension buffer machine includes a frame, a fixed guide wheel, and a tension wheel. The fixed guide wheel is mounted on the frame, and a swing arm that can swing around a rotating shaft is provided on the frame. The tension wheel is mounted on the swing arm and can move closer to or away from the fixed guide wheel as the swing arm swings. A wire pressing mechanism is also provided on the frame. The wire pressing mechanism includes a swing arm that is hinged to the frame and a wire pressing guide wheel that is mounted on the swing arm and used to press the wire. The wire pressing guide wheel can switch between a pressing position that can press the wire and a disengaging position that can detach the wire under the drive of the swing arm. The wire pressing guide wheel and the fixed guide wheel can press the wire from both sides, and there is a gap between the pressing position of the wire pressing guide wheel and the pressing position of the fixed guide wheel.

[0020] As a further improvement, the fixed guide wheel is located on the inside of the frame, and the wire pressing mechanism is located on the outside of the frame.

[0021] As a further improvement, the wire pressing position of the wire pressing guide wheel is located below the disengagement position, so that the wire pressing guide wheel can press the wire downward.

[0022] As a further improvement, the swing arm includes a root section that connects to the frame and a mounting section for mounting the wire guide rollers. The root section and the mounting section are set at an angle, and the swing arm as a whole has an L-shaped structure.

[0023] As a further improvement, the length of the root segment is less than or equal to the length of the mounting segment.

[0024] As a further improvement, the length of the root section is less than or equal to the distance from the hinge position of the swing arm to the wire inlet on the frame.

[0025] As a further improvement, a wire breakage detection proximity switch is installed on the frame. After the wire pressing guide wheel moves from the wire pressing position to a direction away from the disengagement position, the swing arm can approach and trigger the wire breakage detection proximity switch.

[0026] As a further improvement, the tension buffer also includes a speed detection structure for detecting the rotational speed of the guide wheel. The speed detection structure can feed back the detection signal to the frequency converter of the take-up machine in the wire rewinding production line so that the take-up machine can adjust the take-up speed of the wire according to the rotational speed of the guide wheel.

[0027] As a further improvement, the speed detection structure includes a measuring ring and a speed detection proximity switch. The measuring ring is fixed coaxially with the guide wheel and rotates with the guide wheel. Toothed structures are arranged at intervals along the circumference of the outer edge of the measuring ring, and gaps are formed between adjacent toothed structures. The speed detection proximity switch is mounted on the frame and is used to detect the alternation period of the toothed structures and gaps when the measuring ring rotates.

[0028] The beneficial effects are as follows: The wire rewinding production line provided by this utility model is an improvement on the existing technology. This wire rewinding production line adds a wire pressing mechanism to the tension buffer machine. When processing thicker, less flexible wires, the wire pressing guide wheel moves to the pressing position, thereby using the cooperation of the wire pressing guide wheel and the fixed guide wheel to tension the wire. When processing thinner, more flexible wires, the fixed guide wheel cooperates with the tension wheel to press the wire, and the wire pressing guide wheel moves upward to the disengagement position to avoid interfering with the wire. Through this method, the same production line can produce different types of wires without changing equipment, thereby improving the versatility of the production line, increasing the efficiency of preparation work when producing different types of wires, and reducing preparation costs. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the wire rewinding production line of this utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the tension buffer machine when the pressing guide wheel is in the pressing position in Embodiment 1 of the wire rewinding production line of this utility model;

[0031] Figure 3 This is a schematic diagram of the back structure of the tension buffer machine in Embodiment 1 of the wire rewinding production line of this utility model;

[0032] Figure 4 This is a schematic diagram of the tension buffer machine in the disengaged position in Embodiment 1 of the wire rewinding production line of this utility model.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Wire feeding machine; 2. Wire taking machine; 3. Wire processing equipment; 4. Tension buffer machine; 401. Frame; 402. Fixed guide wheel; 403. Tension wheel; 404. Swing arm; 405. Rotating shaft; 406. Upper limit stop; 407. Lower limit stop; 408. First wire breakage detection proximity switch; 409. Displacement sensor; 410. Tensioning cylinder; 411. Swing arm; 412. Wire pressing guide wheel; 413. Measuring ring; 414. Toothed structure; 415. Speed ​​detection proximity switch; 416. Follower; 5. Wire. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the embodiments.

[0036] The basic concept of this utility model is to add a mechanism to the tension buffer machine that can work with the guide wheel to press the wire from both sides, so that the wire can be compressed without having to repeatedly wind between the guide wheel and the tension wheel, thereby improving the versatility of the tension buffer machine.

[0037] Specific embodiment 1 of the wire rewinding production line provided by this utility model:

[0038] See appendix Figure 1 The wire rewinding production line includes a wire unwinding machine 1, a wire take-up machine 2, a wire processing device 3, and a tension buffer machine 4. The wire unwinding machine 1 is used to unwind the coiled wire 5, and the wire take-up machine 2 is used to wind the wire 5. Both the wire unwinding machine 1 and the wire take-up machine 2 are existing technologies and will not be described in detail here. The wire processing device 3 can be a device for cleaning the wire 5, or it can be other processing equipment that does not require a large traction force on the wire 5.

[0039] See appendix Figure 2 Appendix Figure 3 and appendix Figure 4 The tension buffer machine 4 includes a frame 401, a fixed guide wheel 402, a tension wheel 403, and a wire pressing mechanism. The fixed guide wheel 402 and the tension wheel 403 are both located inside the frame 401, while the wire pressing mechanism is located outside the frame 401. When processing thinner, more flexible wires 5, the fixed guide wheel 402 and the tension wheel 403 work together to tension the wire 5; when processing thicker, less flexible wires 5, the fixed guide wheel 402 and the wire pressing mechanism work together to tension the wire 5.

[0040] See appendix Figure 2 and attached Figure 3 The fixed guide wheel 402 is rotatably mounted on the frame 401. The frame 401 is provided with a swing rod 404 that can swing around a fixed axis. The axis around which the swing rod 404 swings is its rotation axis 405. The tension wheel 403 is rotatably mounted on the end of the swing rod 404 away from the rotation axis 405. The swing rod 404 can make the tension wheel 403 move closer to or away from the fixed guide wheel 402 by swinging.

[0041] The fixed guide wheel 402 consists of three coaxial sub-guide wheels, each with an annular groove for guiding the wire 5. The tension wheel 403 consists of two coaxial sub-guide wheels, each with an annular groove for guiding the wire 5. In other embodiments, both the fixed guide wheel 402 and the tension wheel 403 can be made of a single guide wheel, with different numbers of grooves formed on the guide wheel to meet the guiding requirements of the wire 5.

[0042] Tension wheel 403 is located below guide wheel 402. For thinner, more flexible wires 5, see Appendix. Figure 2 The arrow in the diagram indicates the transmission direction of wire 5. Wire 5, passing through the tension buffer machine 4, goes over the fixed guide wheel 402 from above, then around the tension wheel 403 downwards. Wire 5 then goes over the fixed guide wheel 402 again, then around the tension wheel 403 again, and finally exits the tension buffer machine 4 after passing over the fixed guide wheel 402 once more. Four segments of wire 5 pull between the tension wheel 403 and the fixed guide wheel 402. The swing arm 404, by swinging, can tighten the wire 5 using the tension wheel 403.

[0043] The frame 401 is provided with an upper limit member 406 and a lower limit member 407 for limiting the swing of the swing arm 404. The upper limit member 406 and the lower limit member 407 are located on the upper and lower sides of the swing direction of the swing arm 404, respectively, and correspond to the upward swing limit position and the downward swing limit position of the swing arm 404, respectively. The upper limit member 406 and the lower limit member 407 can prevent the swing arm 404 from swinging too much.

[0044] The frame 401 is equipped with an angle detection structure for detecting the rotation angle of the rotating shaft 405 and thus obtaining the swing angle of the swing arm 404. This angle detection structure allows the determination of the position of the swing arm 404. Specifically, the angle detection structure includes a displacement sensor 409 and a follower 416. The displacement sensor 409 is fixedly mounted on the frame 401, and the follower 416 is fixed to the rotating shaft 405 and can swing with the rotation of the rotating shaft 405. The end of the follower 416 radially away from the rotating shaft 405 is an arc-shaped surface, and the detection head of the displacement sensor 409 slides and presses against the arc-shaped surface. The rotating shaft 405 can drive the follower 416 to swing. Since the position of the displacement sensor 409 remains unchanged, during the swing of the follower 416, the movement trajectory of the detection head of the displacement sensor 409 on the arc-shaped surface follows the circumference of the rotating shaft 405. One end of the arc-shaped surface is close to the rotating shaft 405 while the other end is far away from the rotating shaft 405. The distance from the arc-shaped surface to the rotating shaft 405 gradually increases or decreases along the circumferential direction. During the swing of the follower 416, it is in different positions, and the extension amount detected by the detection head of the displacement sensor 409 is different. In this way, the swing angle of the follower 416 can be converted into the linear movement of the detection head of the displacement sensor 409, which is convenient for detection.

[0045] Displacement sensor 409 is connected to the analog input terminal of the frequency converter of the wire feeding machine 1. Displacement sensor 409 can transmit the position information of the swing arm 404 to the drive frequency converter of the wire feeding machine 1 in real time, enabling the wire feeding machine 1 to adjust the feeding speed of the wire 5 according to the position of the swing arm 404. Specifically, when the swing arm 404 swings downwards too much, the wire feeding machine 1 slows down the feeding speed, thereby tauting the wire 5 and causing the swing arm 404 to move upwards under the pull of the wire 5; when the swing arm 404 swings upwards too much, the wire feeding machine 1 speeds up the feeding speed, thereby reducing the tautness of the wire 5 and causing the swing arm 404 to swing downwards under the drive of the tensioning cylinder 410. Therefore, without any wire breakage in the wire 5, this method ensures that the swing arm 404 remains in the middle position between the upper limit member 406 and the lower limit member 407.

[0046] The frame 401 is also equipped with a first wire breakage detection proximity switch 408. The detection head of the first wire breakage detection proximity switch 408 faces the follower 416 and is used to detect the approach and departure of the follower 416. Since the follower 416 swings synchronously with the swing arm 404, the position of the follower 416 can be detected to determine whether the swing arm 404 is at its downward swing limit. If the swing arm 404 remains at its downward swing limit for more than a few seconds, it can be considered that the wire 5 has broken.

[0047] The tension buffer machine 4 in this embodiment also includes a tensioning drive mechanism for providing a swinging driving force to the swing arm 404 to tension the wire 5. The tensioning drive mechanism is a tensioning cylinder 410, which is located above the swing arm 404. The cylinder body of the tensioning cylinder 410 is movably connected to the frame 401 by a hinge, and the piston rod end of the tensioning cylinder 410 is movably connected to the swing arm 404 by a hinge. When the piston rod of the tensioning cylinder 410 extends, the swing arm 404 swings downward; when the piston rod of the tensioning cylinder 410 retracts, the swing arm 404 swings upward. The tensioning cylinder 410 is adjusted by a regulating valve to obtain a suitable air pressure, which can balance the tension provided by the four segments of wire 5 connected between the tension wheel 403 and the guide wheel 402 and keep the swing arm 404 in the middle position between the upper limit member 406 and the lower limit member 407.

[0048] The pressing mechanism includes a pressing guide wheel 412 and a swing arm 411. Specifically, the swing arm 411 is an L-shaped crank arm to make its swing more flexible. One end of the swing arm 411 is movably connected to the top of the frame 401 by a hinge, and the pressing guide wheel 412 is rotatably mounted on the other end of the swing arm 411.

[0049] The wire pressing guide wheel 412 has two states, which correspond to two positions of the wire pressing guide wheel 412. The two positions of the wire pressing guide wheel 412 are the pressing position, which can press the wire 5, and the disengagement position, which is below the disengagement position. The wire pressing guide wheel 412 is driven by the swing arm 411 to switch between the pressing position and the disengagement position. Specifically, in this embodiment, the wire pressing guide wheel 412 presses the wire by its own weight and that of the swing arm 411.

[0050] See appendix Figure 4 When processing thicker, less flexible wire 5, the operator manually rotates the wire-pressing guide roller 412 downwards to the pressing position, thereby pressing the wire 5 downwards; see appendix. Figure 2 When processing thin, easily bendable wires 5, the fixed guide wheel 402 and tension wheel 403 work together to tension the wires 5. The operator manually rotates the pressure guide wheel 412 upwards to the disengaged position, and then the swing arm 411 rests on the frame 401. The frame 401 supports the swing arm 411 in the disengaged position, preventing interference with the wires 5. This method allows the same production line to produce different types of wires 5 without changing equipment, thereby improving the versatility of the production line, increasing the efficiency of preparation work when producing different types of wires 5, and reducing preparation costs.

[0051] The thicker, less flexible wire 5 is inserted into the frame 401, rests on the upper side of the fixed guide roller 402, and exits directly from the frame 401 after passing through the fixed guide roller 402, without going around the tension roller 403. The fixed guide roller 402 provides support for the wire 5. The pressure guide roller 412 moves downward, pressing the wire 5 from top to bottom, causing the wire 5 to bend slightly and thus pressing it tightly. Since the wire 5 no longer needs to be wound back and forth at this point, only one groove is needed on the pressure guide roller 412 to guide the wire 5.

[0052] In this embodiment, the pressure guide roller 412 and the fixed guide roller 402 can press the wire 5 from both sides, and there is a gap between the pressing position of the pressure guide roller 412 on the wire 5 and the pressing position of the fixed guide roller 402 on the wire 5. Moreover, since the fixed guide roller 402 is located on the inner side of the frame 401 and the pressure mechanism is located on the outer side of the frame 401 in this embodiment, there can be a large gap between the pressure guide roller 412 and the fixed guide roller 402, which improves the tensioning effect of the wire 5.

[0053] The swing arm 411 specifically includes a root section connected to the frame 401 and an mounting section for mounting the wire guide wheel 412. The length of the root section is less than the length of the mounting section, and the length of the root section is also less than the distance from the hinge position of the swing arm 411 to the wire inlet on the frame 401.

[0054] If the wire exerts an upward force on the pressure guide roller 412 due to tension changes during use, the pressure guide roller 412 is prone to springing upward. The lever arm of this force is the horizontal distance from the contact point between the pressure guide roller 412 and the wire to the hinge point between the cantilever 411 and the frame 401. When the pressure guide roller 412 is in the pressure position, the root section is close to horizontal and the mounting section is close to vertical, meaning the lever arm length is close to the length of the root section. This design allows for a shorter root section of the swing arm 411, resulting in a shorter lever arm. With the force exerted by the wire on the pressure guide roller 412 remaining constant, a shorter lever arm reduces the torque on the swing arm 411, making it less likely for the pressure guide roller 412 to spring upward, thus ensuring safe and reliable use.

[0055] A second wire breakage detection proximity switch is installed at the top of the frame 401. The position of the second wire breakage detection proximity switch is lower than the position of the swing arm 411 when the wire pressing guide wheel 412 is in the wire pressing position. When the wire 5 breaks, the swing arm 411 will continue to swing downward, causing the wire pressing guide wheel 412 to exceed the wire pressing position, and triggering the second wire breakage detection proximity switch, causing the entire system to stop automatically.

[0056] Whether it is a thicker, less flexible wire or a thinner, more flexible wire, since they are in close contact with the fixed guide wheel 402, they can drive the fixed guide wheel 402 to rotate. The rotation speed of the fixed guide wheel 402 is related to the transmission speed of the wire 5. Therefore, by measuring the rotation speed of the fixed guide wheel 402, the transmission speed of the wire 5 can be obtained.

[0057] The tension buffer 4 in this embodiment also includes a speed detection structure for detecting the rotational speed of the fixed guide wheel 402. The speed detection structure includes a measuring ring 413 and a speed detection proximity switch 415. The measuring ring 413 is coaxially fixed with the fixed guide wheel 402 and rotates with the fixed guide wheel 402. Toothed structures 414 are arranged circumferentially at intervals along the outer edge of the measuring ring 413, forming gaps between adjacent toothed structures 414. The detection head of the speed detection proximity switch 415 faces the toothed structures 414. During the rotation of the measuring ring 413, the toothed structures 414 and the gaps between adjacent toothed structures 414 alternately approach the detection head of the proximity switch, thereby causing the proximity switch to obtain a pulse signal. The period of this pulse signal is the alternation period of the toothed structures 414 and the gaps. The rotational speed of the measuring ring 413 can be calculated based on the period of the pulse signal, and thus the rotational speed of the fixed guide wheel 402 can be obtained. In this speed detection structure, the speed detection proximity switch 415 and the measuring ring 413 do not directly contact each other, thus avoiding wear during use and ensuring a longer service life. For the measurement principle of the speed measurement structure, please refer to the spindle rotation speed end detection mechanism in Chinese Utility Model Patent No. CN207964861U.

[0058] The speed detection proximity switch 415 in the speed measurement structure is connected to the pulse input terminal of the drive inverter of the take-up machine 2. The speed detection proximity switch 415 can transmit the speed information of the fixed guide wheel 402 to the drive inverter of the take-up machine 2 in real time, so that the take-up machine 2 can adjust the take-up speed of the wire 5 according to the speed of the fixed guide wheel 402. For example, as the take-up machine 2 takes up the wire 5, the diameter of the wire 5 roll will increase, and the linear speed of the wire 5 will increase accordingly. After the linear speed of the wire 5 increases, the speed of the fixed guide wheel 402 will increase accordingly. At this time, the take-up machine 2 reduces the take-up speed of the wire 5 according to the speed information of the fixed guide wheel 402, thereby bringing the transmission speed of the wire 5 back to near the set value.

[0059] Using this method, the wire 5 can be kept passing through the production line at a set speed. There is no need to set up a traction machine on the production line that can provide traction force to the wire 5 and keep the wire 5 transmitted at a constant speed, thereby reducing the floor space of the entire wire rewinding production line and reducing processing costs.

[0060] Specific embodiment 2 of the wire rewinding production line provided by this utility model:

[0061] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the tensioning drive mechanism in this embodiment is a tension spring. The tension spring is located below the swing arm, and its upper end is fixed to the swing arm and its lower end is fixed to the frame.

[0062] Specific embodiment 3 of the wire rewinding production line provided by this utility model:

[0063] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that no tensioning drive structure is set in this embodiment. The tensioning of the wire is achieved by the weight of the swing arm and the tensioning wheel. If the tension is insufficient, a counterweight can be configured to increase the tension.

[0064] Specific embodiment 4 of the wire rewinding production line provided by this utility model:

[0065] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that no displacement sensor is set in this embodiment. Instead, an upper limit proximity switch is set on the frame at the position corresponding to the upper swing limit position of the swing arm. Both the upper limit proximity switch and the wire breakage detection proximity switch are connected to the frequency converter of the wire feeding machine.

[0066] In this embodiment, when the swing arm swings upward and approaches the upper limit proximity switch, the wire feeding machine accelerates the wire feeding speed. When the swing arm swings downward and approaches the wire breakage detection proximity switch, the wire feeding machine slows down the wire feeding speed. This method can also be used to control the position of the swing arm. However, if the swing arm remains at the lower swing limit position for an extended period, for example, if the swing arm remains at the lower swing limit position for more than 2.5 seconds, it can be assumed that the wire has broken, and the control system will stop.

[0067] Specific embodiment 5 of the wire rewinding production line provided by this utility model:

[0068] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the speed detection structure in this embodiment is an encoder.

[0069] Specific embodiment 6 of the wire rewinding production line provided by this utility model:

[0070] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that no speed detection structure is set in this embodiment. Instead, a traction machine is set on the production line to ensure a constant transmission speed of the wire.

[0071] Specific embodiment 7 of the wire rewinding production line provided by this utility model:

[0072] This embodiment is based on Embodiment 1, but differs in that the pressure point of the pressure guide roller in this embodiment is above the disengagement point, allowing the pressure guide roller to press the wire from bottom to top. Correspondingly, the wire needs to pass under the fixed guide roller, allowing the fixed guide roller to press the wire from top to bottom.

[0073] Specific embodiment 8 of the wire rewinding production line provided by this utility model:

[0074] This embodiment is based on Embodiment 1, but differs in that the swing arm's swing is driven by a telescopic drive device. One end of the telescopic drive device is hinged to the frame, and the other end is hinged to the swing arm. The extension and retraction of the telescopic drive device can drive the swing arm to swing up and down, thereby moving the wire guide roller up and down. Specifically, the telescopic drive device is a top-pressure cylinder. Because gas is compressible, the top-pressure cylinder can adaptively adjust according to the wire tension, ensuring continuous wire tension. In other embodiments, the telescopic drive device can also be an electric actuator. In this case, a pressure sensor needs to be installed on the wire guide roller so that the electric actuator adjusts its extension / retraction state according to the pressure applied to the wire guide roller.

[0075] Specific embodiment 9 of the wire rewinding production line provided by this utility model:

[0076] This embodiment is based on Embodiment 1, but the difference is that the swing arm in this embodiment is a straight arm.

[0077] Specific embodiment 10 of the wire rewinding production line provided by this utility model:

[0078] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the guide structure in this embodiment can also be a slide rail extending vertically on the frame and a sliding seat with vertical guides on the slide rail, with the pressure guide wheel located below the sliding seat.

[0079] In this embodiment, the pressure guide wheel can press the wire downward under its own weight and the gravity of the sliding seat. Alternatively, a cylinder can be installed between the slide rail and the sliding seat to control the up and down sliding of the sliding seat, thereby completing the pressing operation on the wire.

[0080] Specific embodiment 11 of the wire rewinding production line provided by this utility model:

[0081] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the wire pressing mechanism is located inside the frame, but there is still a gap between the pressing position of the wire guide wheel on the wire and the pressing position of the fixed guide wheel on the wire to ensure that the wire is pressed.

[0082] Specific embodiments of the tension buffer machine provided by this utility model:

[0083] The tension buffer machine is the tension buffer machine in the specific embodiment of the wire rewinding production line mentioned above, and will not be described in detail again.

[0084] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tension buffer comprising a frame, a fixed guide wheel and a tension wheel, the fixed guide wheel being mounted on the frame, a swing lever being provided on the frame and being able to swing about a swing axis, the tension wheel being mounted on the swing lever and being able to approach or move away from the fixed guide wheel with the swing of the swing lever, characterized in that, The rack is further provided with a wire pressing mechanism, which comprises a swing arm hingedly mounted on the rack and a wire pressing guide wheel mounted on the swing arm and used for pressing the wire, the wire pressing guide wheel being capable of being switched between a wire pressing position for pressing the wire and a disengaging position for disengaging the wire under the drive of the swing arm, the wire pressing guide wheel and the fixed guide wheel being capable of pressing the wire from two sides of the wire, and a space being left between the wire pressing position of the wire pressing guide wheel and the wire pressing position of the fixed guide wheel.

2. The tension buffer machine of claim 1, wherein, The fixed guide wheel is arranged on the inner side of the rack, and the wire pressing mechanism is arranged on the outer side of the rack.

3. The tension buffer machine according to claim 1 or 2, characterized in that, The wire pressing position of the wire pressing guide wheel is below the disengaging position, so that the wire pressing guide wheel can press the wire downward.

4. The tension buffer machine of claim 3, wherein, The swing arm comprises a root section connected with the rack and a mounting section used for mounting the wire pressing guide wheel, the root section being arranged at an angle with the mounting section, and the swing arm as a whole has an L-shaped structure.

5. The tension buffer machine of claim 4, wherein, The length of the root section is less than or equal to the length of the mounting section.

6. The tension buffer machine of claim 4, wherein, The length of the root section is less than or equal to the distance from the hinged position of the swing arm with the rack to the wire inlet on the rack.

7. The tension buffer machine according to claim 1 or 2, wherein The rack is provided with a wire breakage detection proximity switch, and the swing arm can approach and trigger the wire breakage detection proximity switch after the wire pressing guide wheel moves from the wire pressing position to a direction away from the disengaging position.

8. The tension buffer machine according to claim 1 or 2, wherein The tension buffer machine further comprises a rotation speed detection structure used for detecting the rotation speed of the fixed guide wheel, the rotation speed detection structure being capable of feeding a detection signal to a frequency converter of a take-up machine in a wire rewinding production line, so that the take-up machine can adjust the take-up speed of the wire according to the rotation speed of the fixed guide wheel.

9. The tension buffer machine of claim 8, wherein, The rotation speed detection structure comprises a measuring ring and a rotation speed detection proximity switch, the measuring ring being coaxially fixed with the fixed guide wheel and rotating with the fixed guide wheel, tooth-shaped structures being arranged at the outer edge of the measuring ring in a circumferential direction, and a space being formed between adjacent tooth-shaped structures, the rotation speed detection proximity switch being mounted on the rack and used for detecting the alternating period of the tooth-shaped structures and the space when the measuring ring rotates.

10. A wire rewinding production line comprising a wire unwinding machine, a wire winding machine, a wire processing device and a tension buffer machine, characterized in that, The tension buffer machine is the tension buffer machine according to any one of claims 1-9.

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