An automatic positioning calibration mechanism for a parallel wire machine

Abstract

The utility model discloses a kind of automatic positioning calibration mechanisms for parallel-wire machine, include first bottom plate and second bottom plate. Telescopic rod is mounted on first bottom plate, and its top is equipped with ranging sensor. Electric push rod is fixed on second bottom plate, and horizontal torus column sleeve is equipped on the top of electric push rod. Torus column sleeve is opened circular column groove in front end to form spring cavity, and cylinder wall is divided into inner and outer cylinder wall, inner cylinder wall front end has inner through slot, and outer cylinder wall front end has outer through slot. Cylindrical sliding shaft is slidably arranged in sleeve, and limiting rod is further arranged on the outer side wall, limiting rod is simultaneously arranged in inner and outer through slots, so that sliding shaft can only slide forward and backward. Spring cavity has spring, rear end abuts spring cavity rear end wall, and front end abuts limiting rod. Torus cover is detachably arranged on sleeve front end, and sliding shaft is arranged in torus cover. Contact head is arranged on the front end of sliding shaft, and the front end is straight cylindrical surface, central axis is horizontal and extends forward and backward, and the junction has circular surface. Ranging sensor is located at the opening of sleeve rear end, and is used for measuring displacement data of sliding shaft rear end surface.

Description

Technical Field

[0001] This utility model relates to the field of copper wire processing technology, and specifically to an automatic positioning and calibration mechanism for a wire drawing machine. Background Technology

[0002] In the field of copper wire processing, parallel-wire copper wire is made by tightly combining multiple fine copper wires, and a parallel-wire machine is needed for winding. The parallel-wire machine mainly consists of two mechanisms: a winding mechanism for fixing and rotating the drum, and a guiding mechanism for mounting the guide wheel on a slide table. During parallel-wire winding, the winding mechanism controls the drum to rotate at different angular velocities within different preset time periods to ensure that the linear speed is the same. The slide table calculates the left and right sliding speed of the guide wheel over time based on parameters such as the drum's rotation speed, drum length, and copper wire diameter, and inputs this time-speed curve parameter into the controller. The controller then controls the slide table in the guiding mechanism to slide the slider left and right according to preset parameters, smoothly winding the copper wire layer by layer onto the drum.

[0003] However, the wire-coupling effect of this method is not ideal. It is impossible to monitor the winding height of the copper wires on the drum in real time, and it is impossible to adjust the moving speed of the slider according to the actual winding height. This results in the copper wires being loosely arranged or over-wound due to the speed being too fast or too slow during the winding process.

[0004] Therefore, an automatic positioning and calibration mechanism for a wire winding machine is designed, which can locate the winding height of the copper wire on the drum in real time, and then send parameters to calibrate the slider movement speed and drum speed on the slide table according to the located winding height, so as to wind the copper wire reasonably. Utility Model Content

[0005] The purpose of this invention is to provide an automatic positioning and calibration mechanism for a wire drawing machine to solve the problems described in the background art.

[0006] The technical solution of this utility model is implemented as follows:

[0007] An automatic positioning and calibration mechanism for a twinning machine includes a first base plate and a second base plate. A telescopic rod is fixedly mounted on the first base plate, and a distance sensor is mounted on the top of the telescopic rod. An electric push rod is fixedly mounted on the second base plate, and a second mounting plate is fixedly connected to the top of the electric push rod. A horizontally placed annular cylindrical sleeve is fixedly mounted on the upper end of the second mounting plate. The sleeve is open at both ends, and an annular cylindrical groove is formed on the rearward side of the front end of the sleeve wall to form a spring cavity. The spring cavity divides the sleeve wall into an inner cylinder wall and an outer cylinder wall. An inner through groove is also formed on the rearward side of the front end of the inner cylinder wall, and an outer through groove is also formed on the rearward side of the front end of the outer cylinder wall. A cylindrical sliding shaft slides through the sleeve, and the outer side wall of the sliding shaft is flush with the inner side wall of the inner cylinder wall. The sidewalls are slidably fitted together, and a limiting rod is fixed on the outer sidewall of the sliding shaft. The limiting rod slides through the inner and outer through grooves, so that the sliding shaft can only slide back and forth within the sleeve. A spring is also slidably installed in the spring cavity. The rear end of the spring abuts against the rear end wall of the spring cavity, and the front end of the spring abuts against the limiting rod. The front end of the sleeve is detachably covered with a circular cover. The sliding shaft slides through the circular cover. The front end of the sliding shaft is also horizontally provided with a contact head. The front end of the contact head is provided with a straight cylindrical surface. The central axis of the straight cylindrical surface is horizontal and extends to the left and right. The joint between the sidewall of the contact head and the straight cylindrical surface is provided with an arc surface. A distance sensor is provided at the opening at the rear end of the sleeve to measure the displacement data of the rear end face of the sliding shaft.

[0008] A further technical solution is that the telescopic rod includes a threaded tube vertically fixed to the upper end of the first base plate, the inner wall of the threaded tube is provided with internal threads, and also includes a threaded rod screwed into the threaded tube from top to bottom, and the distance measuring sensor is located at the top of the threaded rod.

[0009] A further technical solution is that a horizontally set first mounting plate is fixed to the top of the threaded rod, and a strap is provided at the upper end of the first mounting plate. The distance sensor is fixed to the upper end of the first mounting plate by the strap.

[0010] A further technical solution is that a vertical support rod is fixedly provided at the upper end of the second mounting plate, and a mounting ring is fixedly provided at the top of the support rod. The central axis of the mounting ring is horizontal and set in the front-back direction. A threaded hole communicating with the inner wall of the mounting ring is also opened inward on the outer wall of the mounting ring. A fastening bolt is threaded through the threaded hole. The sleeve slides through the mounting ring. The outer wall of the outer cylinder wall slides and fits against the inner wall of the mounting ring. A positioning hole is also opened on the outer wall of the outer cylinder wall. When the sleeve moves to the preset position, the fastening bolt passes through the threaded hole and enters the positioning hole, so that the sleeve can no longer rotate inside the mounting ring.

[0011] A further technical solution is that the inner cylinder wall of the sleeve extends forward beyond the outer cylinder wall, and the outer wall of the forward-extending part of the inner cylinder wall is provided with external threads, and the annular cover is screwed onto the inner cylinder wall through the external threads.

[0012] A further technical solution is that the sleeve and the annular cover are both made of polytetrafluoroethylene plastic, and the sliding shaft, the limiting rod and the contact head are all made of polytetrafluoroethylene plastic.

[0013] A further technical solution is that the ranging sensor is a spectral confocal displacement sensor or a laser displacement sensor.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. Precise Measurement and Calibration: By contacting the contact head with the drum core, the displacement data of the rear end face of the sliding shaft is measured using a distance sensor, and then converted into the diameter change of the drum core, achieving precise measurement. Through calculation and conversion, the angular velocity of the drum during operation and the moving speed of the guide wheel can be obtained, which helps to achieve automatic positioning and calibration.

[0016] 2. Reasonable structural design: The contact head features both a straight cylindrical surface and an arc surface, increasing the contact area with the copper wire layer and improving measurement accuracy, while ensuring smooth entry of the copper wire into the contact head. The design of components such as the sliding shaft, sleeve, and spring ensures the stability of the sliding shaft during movement, and the spring provides forward elastic force, ensuring the contact head always presses against the copper wire layer. The circular cover facilitates the disassembly, assembly, and maintenance of the sliding shaft and spring.

[0017] 3. Easy Adjustment: The telescopic rod design makes height adjustment of the distance sensor more convenient. The sleeve is fixed by the mounting ring, positioning hole, and fastening bolts, making installation convenient and stable. The circular cover is screwed onto the inner cylinder wall by external threads, making installation convenient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0019] Figure 2 for Figure 1 Top view;

[0020] Figure 3 This is a three-dimensional structural diagram of the sliding shaft and the contact head;

[0021] Figure 4 for Figure 1 Enlarged view of the middle part;

[0022] Figure 5 Front view of the outer sleeve.

[0023] In the diagram, 1. First base plate, 2. Threaded tube, 3. Threaded rod, 4. First mounting plate, 5. Distance sensor, 6. Strap, 7. Second base plate, 8. Electric push rod, 9. Second mounting plate, 10. Support rod, 11. Sleeve, 12. Spring cavity, 13. Spring, 14. Inner through groove, 15. Outer through groove, 16. Circular cover, 17. Sliding shaft, 18. Limiting rod, 19. Contact head, 20. Drum core, 21. Guide wheel, 22. Bracket, 23. Slide table, 24. Slider, 25. Straight cylindrical surface, 26. Arc surface, 27. Mounting ring, 28. Fastening bolt, 29. Positioning hole, 30. Threaded hole. Detailed Implementation

[0024] To better understand the technical content of this utility model, specific embodiments are provided below, and the utility model will be further described in conjunction with the accompanying drawings.

[0025] It should be noted in advance that, if Figure 1 The drum, drum core 20, slide table 23, slider 24, guide wheel 21, and bracket 22 shown are merely simplified illustrations of existing yarn-coating machines. Their purpose is to demonstrate the orientational coordination between the automatic positioning calibration mechanism and the yarn-coating machine, facilitating the arrangement of the automatic positioning calibration mechanism by those skilled in the art. The existing yarn-coating machine itself has a controller to control the drum's rotational speed and the direction and speed of the servo motor in the slide table 23. Therefore, the controller belongs to the internal system of the yarn-coating machine. The distance sensor 5 in the automatic positioning calibration mechanism of this disclosure needs to be electrically connected to the controller in the yarn-coating machine, but the controller should not be considered as included within the scope of protection of this disclosure.

[0026] pass Figure 1 It is understood that when arranging the automatic positioning and calibration mechanism in this disclosure, the contact head 19 should be arranged on the opposite side of the winding contact point so as not to affect the winding of the drum core 20.

[0027] The following section will describe the specific structure of the automatic positioning and calibration mechanism.

[0028] See Figures 1 to 5 An automatic positioning and calibration mechanism for a wire drawing machine includes a first base plate 1 and a second base plate 7.

[0029] It should be noted that the first base plate 1 and the second base plate 7 can be fixed at the bottom by various methods such as welding, bonding, and screwing. These are common methods in the prior art. Those skilled in the art can fully implement the fixing of the first base plate 1 and the second base plate 7 according to the prior art. Therefore, the fixing methods of the first base plate 1 and the second base plate 7 will not be described in detail here.

[0030] A telescopic rod is fixedly mounted on the first base plate 1, and a distance sensor 5 is mounted on the top of the telescopic rod. An electric push rod 8 is fixedly mounted on the second base plate 7, and a second mounting plate 9 is fixedly connected to the top of the electric push rod 8. A horizontally placed annular cylindrical sleeve 11 is fixedly mounted on the upper end of the second mounting plate 9. The sleeve 11 is open at both ends, and an annular cylindrical groove is formed on the rearward side of the front end of the sleeve 11, thus forming a spring cavity 12. The spring cavity 12 divides the sleeve 11 into an inner cylinder wall and an outer cylinder wall. An inner through groove 14 is also formed on the rearward side of the front end of the inner cylinder wall, and an outer through groove 15 is also formed on the rearward side of the front end of the outer cylinder wall. A cylindrical sliding shaft 17 is also slidably inserted through the sleeve 11. The outer side wall of the sliding shaft 17 is slidably fitted and connected to the inner side wall of the inner cylinder wall. A limiting rod 18 is also fixed on the outer side wall of the sliding shaft 17. The limiting rod 18 slides through both the inner through groove 14 and the outer through groove 15, so that the sliding shaft 17 can only slide back and forth within the sleeve 11. A spring 13 is also slidably installed in the spring cavity 12. The rear end of the spring 13 abuts against the rear end wall of the spring cavity 12, and the front end of the spring 13 abuts against the limiting rod 18. The front end of the sleeve 11 is detachably covered with a circular cover 16. The sliding shaft 17 slides through the circular cover 16. The front end of the sliding shaft 17 is also horizontally provided with a contact head 19. The front end of the contact head 19 is provided with a straight cylindrical surface 25. The central axis of the straight cylindrical surface 25 is horizontal and extends in the front and left and right directions. The junction between the side wall of the contact head 19 and the straight cylindrical surface 25 is provided with an arc surface 26. The distance sensor 5 is provided at the opening at the rear end of the sleeve 11 to measure the displacement data of the rear end face of the sliding shaft 17.

[0031] When using the above scheme, the sleeve 11 is adjusted to a suitable height using the electric push rod 8, so that the central axis of the straight cylindrical surface 25 of the contact head 19 is adjusted to be at approximately the same level as the central axis of the drum core 20, so that the straight cylindrical surface 25 abuts against the drum core 20. The optimal implementation is to set an automatic positioning and calibration mechanism at each end of the drum core 20, using the two contact heads 19 for monitoring. The distance sensor 5 is adjusted to a position capable of measuring the height of the rear end face of the slide shaft 17 using the telescopic rod. When there is no copper wire on the drum core 20, the measured distance to the rear end face of the slide shaft 17 is the initial position.

[0032] When the winding core 20 begins to wind the copper wire, as the number of winding layers of copper wire increases, the diameter of the winding core 20 continuously increases, thereby squeezing the contact head 19. After the contact head 19 is squeezed, it drives the sliding shaft 17 to move backward. The distance sensor 5 measures the displacement of the rear end face of the sliding shaft 17, and through calculation and conversion, the displacement can be converted into the change in the diameter of the winding core 20.

[0033] Theoretically, the initial position of the rear end face of the sliding shaft 17 is r(0). The drum rotates at a constant linear velocity Vroll, and the angular velocity ω(t) decreases as the radius r(t) increases, expressed by the formula ω(t) = Vroll / r(t). The displacement data measured in real time by the ranging sensor 5 is d(t), which is ω(t) = Vroll / [r(0) + d(t)]. The angular velocity of the drum during operation can be calculated based on this formula.

[0034] The moving speed of the guide wheel should be Vguide, which is adjusted according to the real-time radius r(t) of the drum. The formula is Vguide = W × Vdrum / 2π × r(t), where W is the sum of the diameters d of the multiple copper wires, i.e., W = d × N. Taking six copper wires wound together as an example, the guide wheel needs to move laterally by six copper wire diameters for each revolution of the drum. Based on this formula, the moving speed of the guide wheel can be calculated.

[0035] The reciprocating motion of the slider 24 on the slide table 23 can be changed in several ways. One method is to set a trigger sensor at a corresponding position. When the slider 24 moves to a preset position, it contacts the trigger sensor to change the direction of the servo motor of the slide table 23. This is the best implementation method. Alternatively, the direction-turning time T of the servo motor can be controlled by calculating the movement time of the slider 24. Since the unidirectional movement stroke S of the slider 24 is fixed, the direction-turning time of the servo motor can be calculated according to the formula T=S / V.

[0036] This solution utilizes a specially designed contact head 19, taking advantage of the characteristics of the straight cylindrical surface 25, to ensure a line contact between the contact head 19 and the copper wire layer, increasing the contact area and improving measurement accuracy. Simultaneously, the characteristics of the side arc surface 26 allow the copper wire to enter the contact head 19 without jamming.

[0037] As the sliding shaft 17 moves backward, the spring 13 abuts against the limiting rod 18, thereby providing a forward elastic force to the sliding shaft 17, ensuring that the contact head 19 always abuts against the copper wire layer. By placing the spring 13 inside the spring cavity 12 and separating the spring 13 from the inner wall of the sleeve 11, the spring 13 is prevented from affecting the testing of the ranging sensor 5, thus improving the measurement accuracy and reliability.

[0038] Furthermore, by setting up a circular cover 16, the disassembly, assembly, and maintenance of the sliding shaft 17 and the spring 13 are made more convenient.

[0039] Specifically, the telescopic rod includes a threaded tube 2 vertically fixed to the upper end of the first base plate 1, the inner wall of the threaded tube 2 is provided with internal threads, and also includes a threaded rod 3 screwed into the threaded tube 2 from top to bottom, and the distance measuring sensor 5 is located at the top of the threaded rod 3.

[0040] When using the above scheme, by setting the connection method between the threaded tube 2 and the threaded rod 3, the height adjustment of the distance sensor 5 becomes more convenient.

[0041] Preferably, a horizontally arranged first mounting plate 4 is also fixed to the top of the threaded rod 3, and a strap 6 is provided at the upper end of the first mounting plate 4. The distance sensor 5 is fixed to the upper end face of the first mounting plate 4 by the strap 6.

[0042] Using the above scheme facilitates the installation of the ranging sensor 5.

[0043] Specifically, a vertical support rod 10 is fixed to the upper end of the second mounting plate 9, and a mounting ring 27 is fixed to the top of the support rod 10. The central axis of the mounting ring 27 is horizontal and set in the front-back direction. A threaded hole 30 communicating with the inner wall of the mounting ring 27 is also opened inward on the outer wall of the mounting ring 27. A fastening bolt 28 is threaded through the threaded hole 30. The sleeve 11 is slidably inserted into the mounting ring 27. The outer wall of the outer cylinder wall is slidably attached to the inner wall of the mounting ring 27. A positioning hole 29 is also opened on the outer wall of the outer cylinder wall. When the sleeve 11 moves to the preset position, the fastening bolt 28 passes through the threaded hole 30 and enters the positioning hole 29, so that the sleeve 11 can no longer rotate inside the mounting ring 27.

[0044] When using the above scheme, the installation of sleeve 11 is made more convenient by setting the mounting ring 27, positioning hole 29 and fastening bolt 28.

[0045] Specifically, the inner wall of the sleeve 11 extends forward beyond the outer wall, and the outer wall of the forward-extending part of the inner wall is provided with external threads. The annular cover 16 is screwed onto the inner wall through the external threads.

[0046] Using the above solution makes the installation of the circular cover 16 more convenient.

[0047] Specifically, the sleeve 11 and the annular cover 16 are both made of polytetrafluoroethylene plastic, and the sliding shaft 17, the limiting rod 18 and the contact head 19 are all made of polytetrafluoroethylene plastic.

[0048] When using the above solution, the slide shaft 17, the limiting rod 18, the sleeve 11, the annular cover 16 and the contact head 19 are made of polytetrafluoroethylene plastic. The good surface lubricity of polytetrafluoroethylene plastic makes the movement of the slide shaft 17 smoother and the friction of the contact head 19 less.

[0049] Specifically, the ranging sensor 5 is a spectral confocal displacement sensor or a laser displacement sensor.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic positioning and calibration mechanism for a twinning machine, characterized in that: The device includes a first base plate and a second base plate. A telescopic rod is fixedly mounted on the first base plate, and a distance sensor is mounted on the top of the telescopic rod. An electric push rod is fixedly mounted on the second base plate, and a second mounting plate is fixedly connected to the top of the electric push rod. A horizontally placed annular cylindrical sleeve is fixedly mounted on the upper end of the second mounting plate. The sleeve is open at both ends, and an annular cylindrical groove is formed on the rearward side of the front end of the sleeve wall to form a spring cavity. The spring cavity divides the sleeve wall into an inner cylinder wall and an outer cylinder wall. An inner through groove is also formed on the rearward side of the front end of the inner cylinder wall, and an outer through groove is also formed on the rearward side of the front end of the outer cylinder wall. A cylindrical sliding shaft slides through the sleeve, and the outer side wall of the sliding shaft is slidably fitted and connected to the inner side wall of the inner cylinder wall. A limiting rod is fixed on the outer wall of the sliding shaft. The limiting rod slides through both the inner and outer through grooves, allowing the sliding shaft to slide back and forth only within the sleeve. A spring slides inside the spring cavity, with its rear end abutting against the rear end wall of the spring cavity and its front end abutting against the limiting rod. A ring cover is detachably mounted on the front end of the sleeve, through which the sliding shaft slides. A contact head is horizontally mounted on the front end of the sliding shaft, with a straight cylindrical surface at its front end. The central axis of the straight cylindrical surface is horizontal and extends to the left and right. An arc surface is provided at the junction between the side wall of the contact head and the straight cylindrical surface. A distance sensor is located at the opening at the rear end of the sleeve to measure the displacement data of the rear end face of the sliding shaft.

2. The automatic positioning and calibration mechanism for a twinning machine according to claim 1, characterized in that: The telescopic rod includes a threaded tube vertically fixed to the upper end of the first base plate, the inner wall of the threaded tube is provided with internal threads, and also includes a threaded rod screwed into the threaded tube from top to bottom, and the distance measuring sensor is located at the top of the threaded rod.

3. An automatic positioning and calibration mechanism for a twinning machine according to claim 2, characterized in that: A horizontally positioned first mounting plate is also fixed to the top of the threaded rod. A strap is provided at the upper end of the first mounting plate, and the distance sensor is fixed to the upper end of the first mounting plate by the strap.

4. An automatic positioning and calibration mechanism for a twinning machine according to claim 3, characterized in that: The upper end of the second mounting plate is also fixed with a vertical support rod, and the top of the support rod is fixed with a mounting ring. The central axis of the mounting ring is horizontal and set in the front-back direction. The outer wall of the mounting ring is also provided with a threaded hole that connects to the inner wall of the mounting ring. A fastening bolt is threaded through the threaded hole. The sleeve slides through the mounting ring. The outer wall of the outer cylinder slides against the inner wall of the mounting ring. The outer wall of the outer cylinder is also provided with a positioning hole. When the sleeve moves to the preset position, the fastening bolt passes through the threaded hole and enters the positioning hole, so that the sleeve cannot rotate inside the mounting ring.

5. An automatic positioning and calibration mechanism for a twinning machine according to any one of claims 1-4, characterized in that: The inner cylinder wall of the sleeve extends forward beyond the outer cylinder wall. The outer wall of the forward-extending part of the inner cylinder wall is provided with external threads, and the annular cover is screwed onto the inner cylinder wall through the external threads.

6. An automatic positioning and calibration mechanism for a twinning machine according to claim 5, characterized in that: The sleeve and the annular cover are both made of polytetrafluoroethylene (PTFE) plastic, and the sliding shaft, the limiting rod, and the contact head are all made of PTFE plastic.

7. An automatic positioning and calibration mechanism for a twinning machine according to claim 1, characterized in that: The ranging sensor is a spectral confocal displacement sensor or a laser displacement sensor.

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