Multi-core wire stranded wire wrapping machine

Abstract

The invention discloses a multi-core wire stranding and wrapping machine which comprises a center line pay-off machine, a multi-core wire stranding machine, a wrapping device and a take-up machine which are arranged in sequence. The center line pay-off machine releases a center line to the multi-core wire stranding machine, and the multi-core wire stranding machine releases a plurality of core wires and stranded the core wires and the center line to form a stranded wire; a wrapping tape is placed out of the wrapping package, the twisted wire is wrapped to form a cable, and the cable is taken up by a take-up machine; the multi-core-wire stranding machine comprises a rack, a rotating support, a rotating shaft, a driving mechanism and at least two constant-tension pay-off devices. The constant-tension pay-off device is arranged on the rotating bracket; the rotating bracket is coaxially fixed on the rotating shaft; the driving mechanism drives the rotating shaft and the rotating support to rotate, so that the core wire and the center wire are twisted. The core wire pay-off tension of the stranding machine can be automatically controlled, so that the tension and the linear speed of a cable are kept constant, digital and intelligent production is realized, and the production efficiency and the quality of the cable are effectively improved.

Description

Technical Field

[0001] The present invention relates to an intelligent manufacturing device for cables, and particularly to a multi-core wire stranding and wrapping machine. Background Art

[0002] In the field of wire and cable manufacturing, there is a device called a stranding and wrapping machine, which generally includes a pay-off machine, a stranding machine, a wrapping machine, and a take-up machine. When producing wires, the center line is conveyed to the center of the stranding machine through the pay-off machine, and then the stranding machine releases multiple core wires, so that these core wires are stranded with the center line to form a stranded wire. After that, the wrapping machine releases the wrapping tape to wrap the stranded wire to form a cable. Finally, the take-up machine winds up and cuts the cable. However, during the process of the existing stranding machine releasing the core wires, as the core wires on the wire reel are continuously released, the core wire radius of the wire reel becomes smaller and smaller, and the length of the core wire released per revolution of the wire reel becomes shorter and shorter. If the rotation speed of the pay-off motor is not adjusted in time, it will affect the pay-off tension of the core wires, thereby affecting the stability of pay-off and having an impact on the stranding and subsequent wrapping of the core wires. In order to output the core wires more stably, it is necessary to adjust the pay-off speed of the wire reel in time to keep the pay-off tension of the core wires constant, so as to improve the stranding and wrapping quality of the cable. Summary of the Invention

[0003] The purpose of the present invention is to provide a multi-core wire stranding and wrapping machine, which can automatically control the pay-off tension of the core wires of the stranding machine, keep the tension and linear speed of the cable constant, realize digital and intelligent production, and effectively improve production efficiency and the quality of the cable.

[0004] To achieve the above object, the present invention provides a multi-core wire stranding and wrapping machine, which includes a center wire pay-off machine, a multi-core wire stranding machine, a wrapping device and a take-up machine arranged in sequence; the center wire pay-off machine pays off the center wire to the multi-core wire stranding machine, the multi-core wire stranding machine pays off a plurality of core wires and strangles the core wires with the center wire to form a stranded wire; the wrapping device pays off a wrapping tape and wraps the stranded wire to form a cable, and the take-up machine takes up the cable; the multi-core wire stranding machine includes a frame, a rotating bracket, a rotating shaft, a driving mechanism and at least two constant-tension pay-off devices; the constant-tension pay-off devices are uniformly arranged on the rotating bracket around the central axis of the rotating bracket; the rotating bracket is coaxially fixed to the rotating shaft; the rotating shaft is horizontally arranged on the frame, and the rotating shaft is provided with a central hole penetrating through both ends along its central axis, and the center wire passes through the central hole; the rotating shaft is provided with channels corresponding to the constant-tension pay-off devices one by one and deviating from the central hole, and the constant-tension pay-off devices pay off the core wires, so that the core wires pass through the channels and approach the center wire; the driving mechanism is arranged on the frame and drives the rotating shaft and the rotating bracket to rotate, so as to strangle the core wires with the center wire; the constant-tension pay-off device includes a frame and a pay-off reel, a pay-off servo motor, a roller, a flexible connecting piece, a rotating servo motor, a tension take-up wheel, a displacement detection component and a servo controller arranged in the frame, the pay-off reel is pivotally connected in the frame, the output end of the pay-off servo motor is connected to the rotating shaft of the pay-off reel to drive the pay-off reel to rotate and pay off the core wire, the roller rotates around a central axis, and the central axis is linearly arranged in the frame, and the core wire is paid out outward after passing around the roller; one end of the flexible connecting piece is connected to the central axis of the roller, and the other end of the flexible connecting piece is eccentrically connected to the tension take-up wheel; the output shaft of the rotating servo motor is connected to the tension take-up wheel to output torque to the tension take-up wheel, and then pull the roller through the flexible connecting piece to provide tension for the core wire; the displacement detection component detects the rotation angle of the output shaft of the rotating servo motor or detects the displacement of the roller, and then controls the output speed of the pay-off servo motor through the servo controller. The displacement detection component, the rotating servo motor and the pay-off servo motor are respectively electrically connected to the servo controller.

[0005] Compared with the prior art, in the present invention, at least two constant-tension wire pay-off devices are arranged on the rotating bracket of the multi-core wire stranding machine, and an unwind servo motor, a roller, a flexible connecting member, a rotating servo motor and a tension take-up wheel are arranged on the constant-tension wire pay-off device. The core wire is paid off by winding around the roller, and at the same time, the roller and the tension take-up wheel are connected by the flexible connecting member. Then, a torque is output to the tension take-up wheel by the rotating servo motor, so that a constant tension is generated between the roller and the tension take-up wheel. Also, a displacement detection component is arranged to automatically detect the rotation angle of the output shaft of the rotating servo motor or the displacement of the roller by the displacement detection component. When the rotation angle of the output shaft or the position of the roller is detected to change, the rotation speed of the unwind servo motor can be adjusted by the servo controller, so as to automatically adjust the wire speed of the core wire, and further achieve automatic control of the tension of the core wire and keep the wire tension and the wire moving speed constant. The whole process only needs to set the output torque of the rotating servo motor by the servo controller and monitor and feedback by using the displacement detection component in combination with the servo controller. Therefore, the parameters of the rotating servo motor, the displacement detection component and the servo controller can be digitally adjusted and set in this solution, which is beneficial to realizing digital and intelligent production, effectively improving production efficiency and improving the quality of the cable.

[0006] Preferably, the displacement detection component is an angular displacement sensor.

[0007] Specifically, the angular displacement sensor is an absolute encoder, and the absolute encoder is arranged on the tail of the output shaft of the rotating servo motor and is electrically connected to the servo controller to detect the rotation angle of the output shaft of the rotating servo motor.

[0008] Preferably, the displacement detection component is a linear displacement sensor.

[0009] Specifically, the linear displacement sensor includes a Hall inductor and an induction plate. The Hall inductor is arranged on the frame and is electrically connected to the servo controller. The induction plate is connected to the central axis and is provided with a magnet, and the Hall inductor detects the position of the induction plate. By arranging the Hall inductor and the induction plate, the displacement of the roller can be detected, so that the rotation speed of the unwind servo motor can also be automatically adjusted by the servo controller, and further the tension of the core wire and the unwind wire speed are automatically controlled and the wire tension and the wire moving speed are kept constant.

[0010] Preferably, the multi-core wire stranding and wrapping machine further includes a forming die, the forming die is arranged between the multi-core wire stranding machine and the wrapping device, and the stranded wire passes through the forming die.

[0011] Preferably, the multi-core wire stranding and wrapping machine further includes a double-wheel drawing device disposed between the wrapping device and the take-up machine, and the cable is wound around two drawing wheels of the double-wheel drawing device respectively.

[0012] Specifically, a transmission mechanism is provided between the wire pay-off servo motor and the rotating shaft of the wire pay-off reel. By providing the transmission mechanism, the transmission mechanism can reduce the output speed of the wire pay-off servo motor, so as to adapt to the wire pay-off speed of the wire pay-off reel.

[0013] Specifically, the transmission mechanism includes a driving pulley, a driven pulley and a transmission belt. The driving pulley is connected to the output end of the wire pay-off servo motor, the driven pulley is connected to one end of the rotating shaft of the wire pay-off reel, and the transmission belt is wound around the driving pulley and the driven pulley respectively.

[0014] Specifically, two parallel and spaced guide rails are provided on the frame. Both ends of the central shaft are connected to sliding sleeves, and the sliding sleeves are slidably sleeved on the guide rails. By providing the guide rails, the rollers can slide along the guide rails to realize position adjustment. At the same time, the flexible connecting member can drive the tension take-up wheel to drive the output shaft of the rotating servo motor to rotate a certain angle, so as to facilitate the detection by the absolute value encoder and realize constant tension output.

[0015] Specifically, the constant-tension wire pay-off device further includes a connecting frame. One end of the connecting frame is fixedly connected to one end of the central shaft, and the other end of the connecting frame is fixedly connected to the other end of the central shaft. The flexible connecting member is connected to the middle of the connecting frame. By providing the connecting frame, the flexible connecting member is located at the middle position of the rollers and is directly opposite to the tension take-up wheel, so as to achieve the purpose of force balance and improve the stability of the equipment operation.

[0016] Specifically, the constant-tension wire pay-off device further includes a guide wheel. The guide wheel is pivotally connected to the frame and is located between the wire pay-off reel and the rollers. The core wire passes around the rollers and then around the guide wheel and is output.

[0017] Specifically, an installation bracket is provided on the outside of the frame, and the servo controller is installed on the installation bracket. In this way, the servo controller can rotate following the rotation of the frame, the connection is simple, and it is avoided that the servo controller is arranged outside the rotating bracket, simplifying the connection structure and making the control very stable. Description of the Drawings

[0018] Figure 1 is a structural diagram of the multi-core wire stranding and wrapping machine of the present invention.

[0019] Figure 2It is a top view of the multi-core wire stranding and wrapping machine of the present invention.

[0020] Figure 3 It is a structural diagram of the multi-core wire stranding machine of the multi-core wire stranding and wrapping machine of the present invention.

[0021] Figure 4 It is a side view of the multi-core wire stranding machine of the multi-core wire stranding and wrapping machine of the present invention.

[0022] Figure 5 It is a structural diagram of the constant-tension wire feeding device of the multi-core wire stranding machine of the present invention.

[0023] Figure 6 It is a top view of the constant-tension wire feeding device of the multi-core wire stranding machine of the present invention.

[0024] Figure 7 It is a schematic diagram of the electrical connection of each module of the multi-core wire stranding machine of the present invention.

[0025] Figure 8 It is a structural diagram of another embodiment of the constant-tension wire feeding device of the multi-core wire stranding machine of the present invention. Detailed implementation manners

[0026] To describe in detail the technical content, structural features, achieved objectives and effects of the present invention, the following is a detailed description in conjunction with the implementation manners and with reference to the accompanying drawings.

[0027] Please refer to Figure 1 , Figure 2 and Figure 7 , the multi-core wire stranding and wrapping machine 100 of the present invention includes a center wire feeding machine (not marked in the figure), a multi-core wire stranding machine 1, a forming die 2, a wrapping device 3, a double-wheel taking device 4, a wire winding machine 5 and a control system 6 arranged in sequence. The center wire feeding machine feeds a center wire 200 to the multi-core wire stranding machine 1. The multi-core wire stranding machine 1 feeds out a plurality of core wires 300 and strangles the core wires with the center wire 200 to form a stranded wire. The wrapping device 3 feeds out a wrapping tape and wraps the stranded wire to form a cable. The wire winding machine 5 winds up the cable. The forming die 2 is arranged between the multi-core wire stranding machine 1 and the wrapping device 3, and the stranded wire passes through the forming die 2. The double-wheel taking device 4 is arranged between the wrapping device 3 and the wire winding machine 5, and the cable is respectively wound around two taking wheels of the double-wheel taking device 4. The center wire feeding machine, the multi-core wire stranding machine 1, the wrapping device 3 and the wire winding machine 5 are respectively communicatively connected to the control system 6. For example, signal transmission can be achieved through wireless connection.

[0028] Please refer to Figure 3 and Figure 4, the multi-core wire stranding machine 1 includes a frame 11, a rotating bracket 12, a rotating shaft 13, a driving mechanism 14 and at least two constant-tension wire feeding devices 15; in this embodiment, the number of the constant-tension wire feeding devices 15 is four; the four constant-tension wire feeding devices 15 are evenly distributed around the central axis of the rotating bracket 12 and arranged on the rotating bracket 12, and the structures of the four constant-tension wire feeding devices 15 are the same. The rotating bracket 12 is coaxially fixed to the rotating shaft 13. The rotating shaft 13 is horizontally arranged on the frame 11 and both ends are rotatably arranged on the frame 11 through bearings. The rotating shaft 13 is provided with a central hole 131 penetrating through both ends along its central axis, and the center line 200 passes through the central hole 131. The rotating shaft 13 is provided with channels 132 corresponding to the constant-tension wire feeding devices 15 one by one and deviating from the central hole 131. Each constant-tension wire feeding device 15 releases the core wire 300 at the same time, so that each core wire 300 passes through each channel 132 and finally extends out from the outlet and approaches the center line 200. The driving mechanism 14 is arranged on the frame 11 and drives the rotating shaft 13 and the rotating bracket 12 to rotate, so that all the core wires 300 are stranded with the center line 200.

[0029] Again, Figure 4 As shown, the driving mechanism 14 includes a motor 141, a first driving pulley 142, a first driven pulley 143 and a first belt 144. The motor 141 is arranged on the frame 11. The first driving pulley 142 is connected to the output end of the motor 141. The first driven pulley 143 is connected to the rotating shaft 13. The first belt 144 is wound between the first driving pulley and the first driven pulley 143.

[0030] Please refer to Figures 5 to 7, the constant-tension wire pay-off device 15 includes a frame 151 and a wire reel 152, a wire pay-off servo motor 153, a roller 154, a flexible connecting member 155, a rotation servo motor 156, a tension take-up wheel 157, a displacement detection component and a servo controller 159 disposed within the frame 151. In this embodiment, the displacement detection component is an angular displacement sensor. Specifically, the angular displacement sensor is an absolute encoder 158. The frame 151 is in a long-shaped structure and is fixedly connected to the rotation bracket 12 at both ends respectively. The wire reel 152 is pivotally connected within the frame 151. The output end of the wire pay-off servo motor 153 is connected to the rotating shaft 1521 of the wire reel 152 to drive the wire reel 152 to rotate and pay off the core wire 300. The rotating shaft 1521 of the wire reel 152 is perpendicular to the central axis of the central hole 131. The roller 154 rotates around a central axis 1541, and the central axis 1541 is linearly movably disposed within the frame 151. The central axis of the central axis 1541 is perpendicular to the central axis of the central hole 131. The core wire is output in a direction opposite to the conveying direction of the center line 200, and after surrounding the roller 154 from the outside and then being paid off from the inside in the same direction as the conveying direction of the center line 200, it enters the channel 132. One end of the flexible connecting member 155 is connected to the central axis 1541 of the roller 154, and the other end of the flexible connecting member 155 is eccentrically connected to the tension take-up wheel 157; the flexible connecting member 155 is a steel wire rope. The output shaft of the rotation servo motor 156 is connected to the tension take-up wheel 157 to output torque to the tension take-up wheel 157, and then pull the roller 154 through the flexible connecting member 155 to provide tension for the core wire. The absolute encoder 158 is disposed on the tail of the output shaft of the rotation servo motor 156 and is electrically connected to the servo controller to detect the rotation angle of the output shaft of the rotation servo motor 156; the absolute encoder 158, the rotation servo motor 156 and the wire pay-off servo motor 153 are respectively electrically connected to the servo controller 159. Specifically, the absolute encoder 158 can detect how many degrees the output shaft of the rotation servo motor 156 has rotated. The origin of the output shaft, that is, the 0-degree angle, can be defined as half of this angle on the absolute encoder 158. Rotation in the clockwise direction from the 0-degree angle is set as positive. When the absolute encoder 158 detects that the output shaft rotates to this angle, it outputs a positive value. Rotation in the counterclockwise direction from the 0-degree position is set as negative. When the absolute encoder 158 detects that the output shaft rotates to this angle, it is a negative value. Then this positive value or negative value is fed back to the servo controller 159. The servo controller 159 is communicatively connected to the control system 6. In this embodiment, the angular displacement sensor can also adopt other known forms of angular displacement sensors, such as inductive angular displacement sensors, potentiometer-type angular displacement sensors, incremental encoders, etc.

[0031] As Figure 8 shown, in another embodiment, the displacement detection component is a linear displacement sensor. Specifically, the linear displacement sensor includes a Hall inductor 160 and an induction plate 161. The Hall inductor 160 is disposed on the frame 151 and electrically connected to the servo controller 159. The induction plate 161 is connected to the central axis 1541 and is provided with a magnet. The induction plate 161 has an induction inclined surface, and the magnet is disposed on the induction inclined surface. The distances from each point to the Hall inductor 160 are gradually changed. Specifically, the distance between the above two gradually decreases along the moving direction of the roller 154 approaching the wire pay-off reel 152. The Hall inductor 160 detects the position of the induction plate 161. Specifically, when the roller 154 moves a certain displacement amount, half of this displacement amount can be defined as the origin of the roller 154, that is, the 0-point position. The side close to the wire pay-off reel 152 of the 0-point position is set as positive. When the Hall inductor 160 detects the roller 154 at this position, it is a positive value. The opposite side of the 0-point position is set as negative. When the Hall inductor 160 detects the roller 154 at this position, it is a negative value. Then, this positive value or negative value is fed back to the servo controller 159. By setting the Hall inductor 160 and the induction plate 161, the displacement amount of the roller 154 can be detected, and thus the rotation speed of the wire pay-off servo motor 153 can be automatically adjusted through the servo controller 159, thereby achieving automatic control of the tension of the core wire and the wire pay-off speed and keeping the wire tension and the wire moving speed constant. Of course, the linear displacement sensor can also adopt other known forms of linear displacement sensors, such as inductive linear displacement sensors, capacitive linear displacement sensors, etc.

[0032] Again, such as Figure 5 and Figure 6 shown, a transmission mechanism 162 is provided between the wire pay-off servo motor 153 and the rotating shaft of the wire pay-off reel 152. By setting the transmission mechanism 162, the transmission mechanism 162 can reduce the output rotation speed of the wire pay-off servo motor 153, so as to adapt to the wire pay-off speed of the wire pay-off reel 152. Specifically, the transmission mechanism 162 includes a second driving pulley 1621, a second driven pulley 1622 and a transmission belt 1623. The second driving pulley 1621 is connected to the output end of the wire pay-off servo motor 153, the second driven pulley 1622 is connected to one end of the rotating shaft of the wire pay-off reel 152, and the transmission belt 1623 is respectively wound around the second driving pulley 1621 and the second driven pulley 1622.

[0033] Please refer to again Figure 5 and Figure 6, two parallel and spaced guide rails 1511 are provided on the frame 151. Both ends of the central shaft 1541 are connected to sliding sleeves 1542, and the sliding sleeves 1542 are respectively slidably sleeved on the two guide rails 1511. The guide rails 1511 are cylindrical polished rods, and the sliding sleeves 1542 are linear bearings. By providing the guide rails 1511, the roller 154 can slide along the guide rails 1511 to achieve position adjustment. At the same time, the flexible connecting member 155 can drive the output shaft of the tension take-up wheel 157 to drive the rotary servo motor 156 to rotate a certain angle, so as to facilitate the detection by the absolute value encoder 158 and achieve constant tension output.

[0034] Please refer to again Figure 5 and Figure 6 , the constant tension wire pay-off device 15 further includes a connecting frame 163. One end of the connecting frame 163 is fixedly connected to one end of the central shaft 1541, and the other end of the connecting frame 163 is fixedly connected to the other end of the central shaft 1541. The flexible connecting member 155 is connected to the middle of the connecting frame 163. The connecting frame 16 is a U-shaped rod. By providing the connecting frame 163, the connection point of the flexible connecting member 155 is at the middle position of the roller 154 and is directly opposite to the tension take-up wheel 157, so as to achieve the purpose of force balance and improve the stability of the equipment operation.

[0035] Please refer to again Figure 5 and Figure 6 , the constant tension wire pay-off device 15 further includes a guide wheel 164. The guide wheel 164 is pivotally connected to the frame 151 and is located between the wire pay-off reel 152 and the roller 154. In addition, the guide wheel 164 is located inside the frame 151 close to the rotary bracket 12, and the core wire 300 passes around the roller 154 and then around the guide wheel 164 and enters the channel 132.

[0036] Again, as Figure 5 shown, an installation bracket 1512 is provided on one side of the middle of the frame 151, and the servo controller 159 is installed on the installation bracket 1512. In this way, the servo controller 159 can rotate following the rotation of the frame 151, the connection is simple, and it is avoided that the servo controller 159 is arranged outside the rotary bracket 12, simplifying the connection structure and making the control very stable.

[0037] Again, as Figure 5 shown, a counterweight wheel 1522 is provided at one end of the rotating shaft 1521 away from the second driven pulley 1622. In this way, the wire pay-off reel 152 can be evenly stressed, which is beneficial to reducing vibration and prolonging the service life of the rotating shaft of the wire pay-off reel 152.

[0038] Combining the above andFigure 1 and Figure 2 , the working principle of the multi-core wire stranding and wrapping machine 100 of the present invention will be described in detail as follows: First, before working, pre-threading is carried out. Specifically, the center line 200 of the center line pay-off machine is sequentially passed through the center hole 131, the forming die 2, the wrapping device 3, the double-wheel take-up device 4 and the take-up machine 5 of the multi-core wire stranding machine 1. At the same time, each constant-tension pay-off device 15 on the multi-core wire stranding machine 1 releases a section of core wire 300, so that these core wires 300 respectively pass through the center hole 131 of the multi-core wire stranding machine 1, the forming die 2, the wrapping device 3, the double-wheel take-up device 4 and are stranded with the center line 200 to form a section of cable, and finally are taken up by the take-up machine 5. During operation, the control system 6 controls the start of the center line pay-off machine, the multi-core wire stranding machine 1, the wrapping device 3 and the take-up machine 5. The center line pay-off machine releases the center line 200, and the four constant-tension pay-off devices 15 release the core wires 300 at the same time. At the same time, the driving mechanism 14 drives the rotation shaft 13 to rotate, and then drives the rotation bracket 12 to rotate. During the rotation process, the four core wires 300 are released and converge with the center line 200 at the forming die 2. Under the action of the rotation of the rotation bracket 12, the four core wires 300 are stranded together around the center line 200 to form a stranded wire. Then, the stranded wire moves forward through the center hole 131 of the wrapping device 3. At the same time, the wrapping device 3 releases the wrapping tape, and the wrapping tape rotates around the stranded wire under the drive of the rotation bracket 12 of the wrapping device 3 and is wrapped on the outer surface of the stranded wire to form a cable. Then, the cable moves forward and winds around the double-wheel take-up device 4 and is taken up by the take-up machine 5.

[0039] In addition, the wire pay-off principle of the constant-tension wire pay-off device 15 is as follows: The pay-off servo motor 153 and the rotation servo motor 156 are started. The rotation servo motor 156 outputs a certain value of torque, and through the tension take-up wheel 157 and the flexible connecting member 155, tension is provided for the core wire. The pay-off servo motor 153 drives the pay-off reel 152 to rotate through the transmission mechanism 162. The pay-off reel 152 continuously pays off the core wire 300, which passes around the roller 154 and the guide wheel and then enters the channel 132, and finally converges near the center line 200 after coming out of the channel 132. As the pay-off reel 152 continuously pays off the core wire 300, the diameter of the core wire 300 around the pay-off reel 152 in one circle becomes smaller and smaller, and the length of the core wire paid off in each circle becomes smaller and smaller, and the pay-off tension becomes larger, thereby driving the roller 154 to move towards the pay-off reel 152. The roller 154 drives the tension take-up wheel 157 to rotate a certain angle through the flexible connecting member 155, and the tension take-up wheel 157 drives the output shaft of the rotation servo motor 156 to rotate a certain angle. At this time, after the absolute encoder 158 detects the rotation of the output shaft, it sends a positive signal to the servo controller 159 (in another embodiment, a positive signal can be sent to the servo controller 159 by the Hall inductor 160 after detecting the position of the roller 154). The servo controller 159 controls the pay-off servo motor 153 to increase the output speed, so that the rotation speed of the pay-off reel 152 increases and the pay-off speed is accelerated, ensuring that the pay-off speed tends to be consistent with the initial speed until the output shaft of the rotation servo motor 156 returns to the initial position, so that the tension and pay-off speed of the core wire 300 are always kept constant.

[0040] Compared with the prior art, in the present invention, at least two constant-tension wire pay-off devices 15 are provided on the rotating bracket 12 of the multi-core wire stranding machine 1, and a wire pay-off servo motor 153, a roller 154, a flexible connecting member 155, a rotating servo motor 156 and a tension take-up wheel 157 are provided on the constant-tension wire pay-off device 15. The core wire is paid off by surrounding the roller 154. At the same time, the roller 154 and the tension take-up wheel 157 are connected by the flexible connecting member 155, and then a torque is output to the tension take-up wheel 157 by the rotating servo motor 156, so that a constant tension is generated between the roller 154 and the tension take-up wheel 157. Further, an absolute encoder 158 is provided at the output end of the rotating servo motor 156, and the rotation angle of the output shaft of the rotating servo motor 156 is automatically detected by the absolute encoder 158. When it is detected that the rotation angle of the output shaft changes, the rotation speed of the wire pay-off servo motor 153 can be adjusted through the control system 6, so as to automatically adjust the linear velocity of the core wire 300, and further achieve automatic control of the tension of the core wire 300 and keep the wire tension and the wire moving speed constant. The whole process only needs to set the output torque of the rotating servo motor 156 through the servo controller 159 and monitor and feedback the output shaft of the rotating servo motor 156 by using the absolute encoder 158 in combination with the servo controller 159. Therefore, the parameters of the rotating servo motor 156 and the absolute encoder 158 can be digitally adjusted and set in this solution, which is beneficial to realizing digital and intelligent production, effectively improving production efficiency and improving the quality of the wire and cable.

[0041] The above-disclosed are only the preferred embodiments of the present invention, and of course, the scope of rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of rights of the present invention still fall within the scope covered by the present invention.

Claims

1. A multi-core wire stranding and wrapping machine, characterized in that: It includes a center line pay-off machine, a multi-core wire stranding machine, a wrapping device and a take-up machine arranged in sequence; the center line pay-off machine pays out the center line to the multi-core wire stranding machine, the multi-core wire stranding machine pays out multiple core wires and strangles the core wires with the center line to form a stranded wire; the wrapping device pays out a wrapping tape and wraps the stranded wire to form a cable, and the take-up machine takes up the cable; the multi-core wire stranding machine includes a frame, a rotating bracket, a rotating shaft, a driving mechanism and at least two constant-tension pay-off devices; the constant-tension pay-off devices are arranged on the rotating bracket around the central axis of the rotating bracket in a uniformly distributed manner; the rotating bracket is coaxially fixed to the rotating shaft; the rotating shaft is horizontally arranged on the frame, and the rotating shaft is provided with a central hole penetrating through both ends along its central axis, and the center line passes through the central hole; the rotating shaft is provided with channels corresponding to the constant-tension pay-off devices one by one and deviating from the central hole, and the constant-tension pay-off devices pay out core wires so that the core wires pass through the channels and approach the center line; the driving mechanism is arranged on the frame and drives the rotating shaft and the rotating bracket to rotate so as to strangle the core wires with the center line. The constant-tension pay-off device includes a frame and a pay-off reel, a pay-off servo motor, a roller, a flexible connecting piece, a rotating servo motor, a tension take-up wheel, a displacement detection component and a servo controller arranged in the frame. The pay-off reel is pivotally connected in the frame. The output end of the pay-off servo motor is connected to the rotating shaft of the pay-off reel to drive the pay-off reel to rotate and pay out the core wire. The roller rotates around a central axis, and the central axis is linearly movably arranged in the frame, and the core wire is paid out outward after surrounding the roller; one end of the flexible connecting piece is connected to the central axis of the roller, and the other end of the flexible connecting piece is eccentrically connected to the tension take-up wheel; the output shaft of the rotating servo motor is connected to the tension take-up wheel to output torque to the tension take-up wheel, and then the flexible connecting piece is used to pull the roller to provide tension for the core wire; the displacement detection component detects the rotation angle of the output shaft of the rotating servo motor or detects the displacement of the roller, and then controls the output speed of the pay-off servo motor through the servo controller; the displacement detection component, the rotating servo motor and the pay-off servo motor are respectively electrically connected to the servo controller.

2. The multi-core wire stranding and wrapping machine according to claim 1, characterized in that: The displacement detection component is an angular displacement sensor, the angular displacement sensor is an absolute encoder, and the absolute encoder is arranged on the tail of the output shaft of the rotating servo motor and is electrically connected to the servo controller to detect the rotation angle of the output shaft of the rotating servo motor.

3. The multi-core wire stranding and wrapping machine according to claim 1, characterized in that: The displacement detection component is a linear displacement sensor. The linear displacement sensor includes a Hall inductor and an induction plate. The Hall inductor is arranged on the frame and is electrically connected to the servo controller. The induction plate is connected to the central axis and is provided with a magnet, and the Hall inductor detects the position of the induction plate.

4. The multi-core wire stranding and wrapping machine according to claim 1, characterized in that: The multi-core wire stranding and wrapping machine further includes a forming die, which is arranged between the multi-core wire stranding machine and the wrapping device, and the stranded wire passes through the forming die.

5. The multi-core wire stranding and wrapping machine according to claim 1, wherein: The multi-core wire stranding and wrapping machine further includes a double-wheel taking device, which is arranged between the wrapping device and the wire take-up machine, and the cable is respectively wound around the two taking wheels of the double-wheel taking device.

6. The multi-core wire stranding and wrapping machine according to claim 1, wherein: A transmission mechanism is provided between the wire pay-off servo motor and the rotating shaft of the wire pay-off reel.

7. The multi-core wire stranding and wrapping machine according to claim 4, characterized in that: The transmission mechanism includes a second driving pulley, a second driven pulley and a transmission belt. The second driving pulley is connected to the output end of the wire pay-off servo motor, the second driven pulley is connected to one end of the rotating shaft of the wire pay-off reel, and the transmission belt respectively surrounds the second driving pulley and the second driven pulley.

8. The multi-core wire stranding and wrapping machine according to claim 1, characterized in that: Two parallel and spaced rails are provided on the frame. Both ends of the central shaft are connected to sliding sleeves, and the sliding sleeves are slidably sleeved on the rails.

9. The multi-core wire stranding and wrapping machine according to claim 1, characterized in that: The constant-tension wire pay-off device further includes a connecting frame. One end of the connecting frame is fixedly connected to one end of the central shaft, and the other end of the connecting frame is fixedly connected to the other end of the central shaft. The flexible connecting member is connected to the middle of the connecting frame.

10. The multi-core wire stranding and wrapping machine according to claim 1, characterized in that: The constant-tension wire pay-off device further includes a guide pulley, which is pivotally connected to the frame and is located between the wire pay-off reel and the roller. The core wire passes around the roller and then around the guide pulley and is output.

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