Magnesium alloy extrusion welding wire on-line coiling device and method

By designing the online coiling device of magnesium alloy extruded wire, the coordinated work of the main turntable and guide plate is used to solve the problem that the welding wire cannot be wound evenly on the I-bottle or reel, and the rapid and uniform winding of the welding wire is achieved, and the processing efficiency is improved.

CN119609293APending Publication Date: 2025-03-14山西银光华盛镁业股份有限公司
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Patent Information

Application Number
CN202411838432.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-03-14

AI Technical Summary

Technical Problem

The existing wire winding device cannot make the wire evenly wrap around the I-bottle or reel, resulting in accumulated wires and confusing winding, and the rapid winding cannot be achieved, reducing processing efficiency.

Method used

A magnesium alloy extruded wire online coil device is designed, including a fixed frame, a processing assembly and a drive member. Through the coordinated work of the main turntable and the guide wheel, uniform winding of the welding wire is achieved. The main turntable rotates to drive the welding wire to wind, and the guide wheel guides the welding wire by moving to ensure that the welding wire is evenly distributed during the winding process.

Benefits of technology

The uniform winding of the welding wire on the I-bottle or the reel is achieved, avoiding the accumulation and winding of welding wires, and improving the efficiency and quality of welding wire winding.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of welding wire winding, in particular to a magnesium alloy extrusion welding wire on-line coiling device and method.The magnesium alloy extrusion welding wire on-line coiling device comprises a fixed rack and further comprises a machining assembly, the machining assembly comprises a supporting base, a rotating rod, a main rotating disc, a moving frame, a moving rod, a guiding disc, a rotating component and a moving component, and the supporting base is fixedly connected with the fixed rack; the rotating rod is connected with the fixed rack through a rotating component and rotationally connected with the supporting seat, the main rotating disc is arranged on the rotating rod, the movable frame is connected with the fixed rack through a movable component, the movable rod is fixedly connected with the movable frame, the guide disc is rotationally connected with the movable rod, and the rotating component is arranged on the fixed rack and connected with the rotating rod. The movable component is arranged on the fixed machine frame and connected with the movable frame, welding wires can be rapidly wound through guiding of the guiding disc and winding of the main rotating disc, and then the machining efficiency is improved.
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Description

Technical Field

[0001] The invention relates to the technical field of welding wire winding, and in particular to an online winding device and method for magnesium alloy extruded welding wire. Background Art

[0002] Traditional welding wire is usually wound manually, but manual winding is time-consuming and inefficient.

[0003] The existing winding device manually rotates the reel so that the welding wire can be quickly introduced into the reel and manually guided so that the welding wire can be introduced into the reel for winding, thereby achieving the purpose of quickly winding the welding wire. However, during the winding process, the existing winding device cannot make the welding wire evenly wound on the I-shaped drum or the winding drum, and thus welding wire accumulation and winding disorder grooves are likely to occur, thereby failing to achieve the purpose of quickly winding the welding wire, thereby reducing the processing efficiency. Summary of the invention

[0004] The object of the present invention is to provide an online winding device and method for magnesium alloy extruded welding wire, aiming to solve the problem that the existing winding device cannot evenly wind the welding wire on an I-shaped drum or a winding drum during the winding process, which easily leads to welding wire accumulation and chaotic winding grooves, thereby failing to achieve the purpose of quickly winding the welding wire, thereby reducing the processing efficiency.

[0005] To achieve the above object, the present invention provides an online coiling device for magnesium alloy extruded welding wire, comprising a fixed frame,

[0006] Also includes processing components,

[0007] The processing assembly includes a supporting seat, a rotating rod, a main rotating disk, a movable frame, a movable rod, a guide plate, a rotating component and a movable member. The supporting seat is fixedly connected to the fixed frame and is located on one side of the fixed frame. The rotating rod is connected to the fixed frame through the rotating component and is rotatably connected to the supporting seat and is located on a side of the fixed frame close to the supporting seat. The main rotating disk is arranged on the rotating rod and is located on one side of the rotating rod. The movable frame is connected to the fixed frame through the movable member and is located on one side of the fixed frame. The movable rod is fixedly connected to the movable frame and is located on one side of the movable frame. The guide plate is rotatably connected to the movable rod and is located on one side of the movable rod. The rotating member is arranged on the fixed frame and connected to the rotating rod. The movable member is arranged on the fixed frame and connected to the movable frame.

[0008] Wherein, the rotating component includes a mounting frame, a rotating motor and a transmission component, the mounting frame is fixedly connected to the fixed frame and is located on one side of the fixed frame; the rotating motor is fixedly connected to the mounting frame and is located on one side of the mounting frame; the transmission component is arranged on the rotating motor and is connected to the rotating rod.

[0009] Wherein, the transmission component includes a first transmission wheel, a second transmission wheel and a transmission belt, the first transmission wheel is connected to the output end of the rotating motor and is located on one side of the rotating motor; the second transmission wheel is fixedly connected to the rotating rod and is located on one side of the rotating rod; the transmission belt is mounted on the first transmission wheel and the second transmission wheel.

[0010] Wherein, the movable component includes a fixed frame and a guide motor, the fixed frame is fixedly connected to the fixed frame and is located on one side of the fixed frame; the guide motor is fixedly connected to the fixed frame and connected to the movable frame, and is located on a side of the fixed frame close to the movable frame.

[0011] Wherein, the processing assembly further comprises a limit block, and the limit block is arranged on the rotating rod and is located on a side of the rotating rod close to the main turntable.

[0012] Wherein, the processing assembly also includes a pressing component, which includes a support frame, a pressing frame and a spring. The support frame is fixedly connected to the fixed frame and is located on one side of the fixed frame; the pressing frame is arranged on the support frame and is located on one side of the support frame; the spring is arranged on the support frame and connected to the pressing frame.

[0013] A method for online coiling of magnesium alloy extruded welding wire comprises the following steps:

[0014] The straightening mechanism is used to perform straightening treatment on the wire before it is put on the disc, and after the straightening treatment is completed, the wire is introduced onto the main turntable;

[0015] The main turntable is started to rotate, and at the same time, the guide plate lags behind the main turntable in translation according to a certain ratio, and the ratio is that the guide plate lags behind the main turntable in translation by 1.5 turns;

[0016] When the turntable rotates to near the end, about 3 turns away from the end, the pre-position switch is activated, and the guide motor reaches the end of the turntable at twice the normal speed;

[0017] When the guide plate pauses at the end for 1.5 pulses, it performs a reversing action;

[0018] Set the end point limit switches at both ends with pulses, and use PLC to monitor and adjust the action execution;

[0019] Complete the winding of the welding wire on the winding drum.

[0020] The invention provides an online winding device and method for magnesium alloy extruded welding wire. It is necessary to wind the welding wire by connecting and fixing one end of the welding wire on the main turntable and overlapping the guide disk, and starting the driving component to drive the rotating rod to rotate. The rotation of the rotating rod can drive the rotation of the main turntable, and then the welding wire on the main turntable is wound. At the same time, the moving rod on the moving frame is driven to move by the moving component, and the guide disk is driven to move by the movement of the moving rod, so that the welding wire is guided by the moving guide disk during the winding process of the main turntable, so that the welding wire can be quickly wound by the guidance of the guide disk and the winding of the main turntable, thereby improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0022] Figure 1 It is a schematic structural diagram of an online coiling device for magnesium alloy extruded welding wire according to a first embodiment of the present invention.

[0023] Figure 2 Schematic diagram of the structure of the processing assembly of the first embodiment of the present invention.

[0024] Figure 3 Schematic diagram of the structure of the driving component of the first embodiment of the present invention.

[0025] Figure 4 Schematic diagram of the structure of the moving component of the first embodiment of the present invention.

[0026] Figure 5 Schematic diagram of the structure of a pressing component according to a second embodiment of the present invention.

[0027] Figure 6 It is a flow chart of the steps of the online coiling method of magnesium alloy extruded welding wire according to the third embodiment of the present invention.

[0028] In the figure: 101-fixed frame, 102-support seat, 103-rotating rod, 104-main turntable, 105-moving frame, 106-moving rod, 107-guide plate, 108-limiting block, 109-mounting frame, 110-rotating motor, 111-first transmission wheel, 112-second transmission wheel, 113-transmission belt, 114-fixed frame, 115-guide motor, 201-support frame, 202-pressing frame, 203-spring. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0030] The first embodiment of the present application is:

[0031] See also Figures 1 to 4 ,in Figure 1 It is a schematic structural diagram of an online coiling device for magnesium alloy extruded welding wire according to a first embodiment of the present invention. Figure 2 Schematic diagram of the structure of the processing assembly of the first embodiment of the present invention. Figure 3 Schematic diagram of the structure of the driving component of the first embodiment of the present invention. Figure 4 Schematic diagram of the structure of the moving component of the first embodiment of the present invention.

[0032] The present invention provides an online winding device for magnesium alloy extruded welding wire, comprising a fixed frame 101 and a processing assembly, wherein the processing assembly comprises a support seat 102, a rotating rod 103, a main rotating disk 104, a moving frame 105, a moving rod 106, a guide disk 107, a rotating member, a moving member and a limit block 108, wherein the rotating member comprises a mounting frame 109, a rotating motor 110 and a transmission component, wherein the transmission component comprises a first transmission wheel 111, a second transmission wheel 112 and a transmission belt 113, and the moving member comprises a fixed frame 114 and a guide motor 115. The above-mentioned scheme solves the problem that the existing winding device cannot make the welding wire evenly wound on the I-shaped drum or the winding drum during the winding process, and then the welding wire is easily accumulated and the winding disorder groove occurs, thereby failing to achieve the purpose of quickly winding the welding wire, thereby reducing the processing efficiency. It can be understood that the above-mentioned scheme can be used in the case where the magnesium alloy extruded welding wire needs to be quickly wound.

[0033] In this embodiment, the fixed frame 101 is used to connect and support the overall structure of the device.

[0034] The support seat 102 is fixedly connected to the fixed frame 101 and is located on one side of the fixed frame 101. The rotating rod 103 is connected to the fixed frame 101 through the rotating member and is rotatably connected to the support seat 102 and is located on a side of the fixed frame 101 close to the supporting seat 102. The main turntable 104 is arranged on the rotating rod 103 and is located on one side of the rotating rod 103. The mobile frame 105 is connected to the fixed frame 101 through the moving member and is located on one side of the fixed frame 101. The moving rod 106 is fixedly connected to the mobile frame 105 and is located on one side of the mobile frame 105. The guide plate 107 is connected to the mobile frame 105. The movable rod 106 is rotatably connected and is located on one side of the movable rod 106. The rotating component is arranged on the fixed frame 101 and is connected to the rotating rod 103. The movable component is arranged on the fixed frame 101 and is connected to the movable frame 105. The support seat 102 is fixedly installed on the fixed frame 101 with bolts. The rotating rod 103 is connected to the fixed frame 101 through the rotating component and is rotatably connected to the support seat 102. The rotating rod 103 can be driven to rotate by the rotating component. The main turntable 104 is arranged on the rotating rod 103. The rotation of the rotating rod 103 can drive the rotation of the main turntable 104. The movable frame 105 is connected to the fixed frame 101 through a moving component, and the moving component can drive the moving frame 105 to move, the moving rod 106 is bolted and fixedly installed on the moving frame 105, and the movement of the moving frame 105 can drive the movement of the moving rod 106, the guide plate 107 is rotatably connected to the moving rod 106, and the movement of the moving rod 106 can drive the movement of the guide plate 107, and at the same time, the guide plate 107 can rotate on the moving rod 106 under the connection of the bearing, and then the rotation and movement of the guide plate 107 can guide the welding wire feeding in the process of the main turntable 104, and the rotating component is arranged on The fixed frame 101 is connected with the rotating rod 103, and the rotating member can provide a corresponding power source for the rotation of the rotating rod 103. The movable member is arranged on the fixed frame 101 and connected with the movable frame 105. The movable member can provide a corresponding power source for the movement of the movable frame 105, thereby realizing the need to wind the welding wire. By connecting and fixing one end of the welding wire to the main turntable 104 and overlapping the guide plate 107, the driving member is started to drive the rotating rod 103 to rotate. The rotation of the rotating rod 103 can drive the rotation of the main turntable 104, and then the welding wire on the main turntable 104 is wound.At the same time, the moving member drives the moving rod 106 on the moving frame 105 to move, and the movement of the moving rod 106 drives the guide plate 107 to move, so that the welding wire is guided by the moving guide plate 107 during the winding process of the main rotating disk 104, so that the welding wire can be quickly wound by the guidance of the guide plate 107 and the winding of the main rotating disk 104, thereby improving the processing efficiency.

[0035] Secondly, the mounting frame 109 is fixedly connected to the fixed frame 101 and is located on one side of the fixed frame 101; the rotating motor 110 is fixedly connected to the mounting frame 109 and is located on one side of the mounting frame 109; the transmission component is arranged on the rotating motor 110 and is connected to the rotating rod 103, the mounting frame 109 is bolted and fixedly installed on the fixed frame 101, the rotating motor 110 is bolted and fixedly installed on the mounting frame 109, the transmission component is arranged on the rotating motor 110 and is connected to the rotating rod 103, and the rotating rod 103 can be driven to rotate through the driving output of the rotating motor 110 and the transmission of the transmission component.

[0036] At the same time, the first transmission wheel 111 is connected to the output end of the rotating motor 110 and is located at one side of the rotating motor 110; the second transmission wheel 112 is fixedly connected to the rotating rod 103 and is located at one side of the rotating rod 103; the transmission belt 113 is sleeved on the first transmission wheel 111 and the second transmission wheel 112, the first transmission wheel 111 is connected to the output end of the rotating motor 110, the second transmission wheel 112 is connected and fixed to the rotating rod 103, the transmission belt 113 is sleeved on the first transmission wheel 111 and the second transmission wheel 112, the driving output of the rotating motor 110 can drive the rotation of the first transmission wheel 111, and the rotation of the second transmission wheel 112 is driven by the transmission belt 113, and then the purpose of driving the rotating rod 103 to rotate is achieved through the rotation of the second transmission wheel 112.

[0037] In addition, the fixed frame 114 is fixedly connected to the fixed frame 101 and is located on one side of the fixed frame 101; the guide motor 115 is fixedly connected to the fixed frame 114 and connected to the movable frame 105, and is located on a side of the fixed frame 114 close to the movable frame 105. The fixed frame 114 is bolted fixedly installed on the fixed frame 101, and the guide motor 115 is bolted fixedly installed on the fixed frame 114. The output end of the guide motor 115 is connected to the movable frame 105, and the movable frame 105 can be driven to move through the driving output of the guide motor 115.

[0038] Finally, the limit block 108 is arranged on the rotating rod 103 and is located on the side of the rotating rod 103 close to the main turntable 104. There are two limit blocks 108, and the two limit blocks 108 are arranged on the rotating rod 103. The limit blocks 108 can prevent the main turntable 104 on the rotating rod 103 from shifting or falling off during the rotation process.

[0039] When using the magnesium alloy extruded welding wire online winding device and method of the present embodiment, it is necessary to wind the welding wire, by connecting and fixing one end of the welding wire to the main turntable 104 and overlapping the guide plate 107, starting the driving component to drive the rotating rod 103 to rotate, and the rotation of the rotating rod 103 can drive the rotation of the main turntable 104, and then the welding wire on the main turntable 104 is wound, and at the same time, the moving rod 106 on the moving frame 105 is driven to move by the moving component, and the guide plate 107 is driven to move by the movement of the moving rod 106, so that the welding wire is guided by the moving guide plate 107 during the winding process of the main turntable 104, so that the welding wire can be quickly wound by the guidance of the guide plate 107 and the winding of the main turntable 104, thereby improving the processing efficiency.

[0040] The second embodiment of the present application is:

[0041] Based on the first embodiment, please refer to Figure 5 , Figure 5 Schematic diagram of the structure of a pressing component according to a second embodiment of the present invention.

[0042] The present invention provides an online coiling device for magnesium alloy extruded welding wire, which also includes a pressing component. The pressing component includes a support frame 201, a pressing frame 202 and a spring 203.

[0043] The support frame 201 is fixedly connected to the fixed frame 101 and is located on one side of the fixed frame 101; the pressing frame 202 is arranged on the support frame 201 and is located on one side of the support frame 201; the spring 203 is arranged on the support frame 201 and is connected to the pressing frame 202, the support frame 201 is bolted and fixedly installed on the fixed frame 101, the pressing frame 202 is arranged on the support frame 201 and can rotate on the support frame 201, and the spring 203 is arranged on the support frame 201 and the pressing frame 202 The deformation ability of the spring 203 can drive the pressing frame 202 to move, so that the pressing frame 202 can always abut against the welding wire reel that has been wound on the main turntable 104. The pressing of the pressing frame 202 can give the welding wire a certain constraint, so that it can be tightly and neatly arranged on the welding wire reel in circles according to predetermined rules, thereby ensuring that the welding wire is arranged neatly and orderly. At the same time, the already wound welding wire can be appropriately compressed by pressing to reduce the gap between them, so that more welding wire can be wound in the limited space of the welding wire reel, thereby increasing the winding density of the welding wire reel.

[0044] The third embodiment of the present application is:

[0045] Based on the second embodiment, please refer to Figure 6 , Figure 6 It is a flow chart of the steps of the online coiling method of magnesium alloy extruded welding wire according to the third embodiment of the present invention.

[0046] A magnesium alloy extruded welding wire online coiling method according to the present embodiment comprises the following steps:

[0047] S301: The straightening mechanism is used to perform straightening treatment on the wire before it is put on the disk. After the straightening treatment is completed, the wire is introduced onto the main turntable 104;

[0048] S302: The main turntable 104 is started to rotate, and the guide plate 107 is translated behind the main turntable 104 at a certain ratio, and the ratio is that the translation of the guide plate 107 lags behind the translation of the main turntable 104 by 1.5 turns;

[0049] S303: When the turntable rotates to near the end, about 3 turns away from the end, the pre-position switch is activated, and the guide motor 115 quickly reaches the end of the turntable at twice the normal speed;

[0050] S304: After the guide plate 107 pauses at the end for 1.5 pulses, it performs a reversing action;

[0051] S305: The end point limit switches at both ends are matched with the pulse mechanism, and the action execution is monitored and adjusted through the PLC;

[0052] S306: Complete the winding of the welding wire on the winding drum.

[0053] Furthermore, the straightening mechanism is used to perform straightening treatment on the wire before it is coiled, and after the straightening treatment is completed, the wire is introduced into the main turntable 104. The online coiling has high requirements on the straightness of the welding wire, but during normal extrusion, the interface of the welding wire is prone to bending. For welding wires with larger wire diameters, it may not have much impact, but for welding wires with very small wire diameters, a small bend may cause a miss in the arrangement of a circle. Therefore, before the welding wire is coiled, it must undergo online straightening treatment to ensure the stability of the coil. Qualitatively, the main turntable 104 is started to rotate, and the guide plate 107 is translated at a certain ratio lagging behind the main turntable 104, and the ratio is that the translation of the guide plate 107 lags behind the main turntable 104 by 1.5 turns. Because the wire diameter is very thin, the welding wire will be easily affected by external forces during the coiling process. Therefore, the translation speed of the guide plate 107 should lag slightly behind the main turntable 104. The translation of the guide plate 107 lags behind the main turntable 104 by 1.5 turns. The coiling effect is best when When the turntable rotates to near the end, about 3 turns away from the end, the pre-position switch is activated, and the guide motor 115 quickly reaches the end of the turntable at twice the normal speed. When the guide plate 107 pauses for 1.5 turns of pulses at the end, it performs a reversing action. To ensure that the guide plate 107 still lags behind in translation after reversing, pre-position switches need to be set at both ends of the turntable. After reaching the pre-position, the guide motor 115 needs to quickly reach the end of the turntable, and then pause for 1.5 turns of pulses before reversing. Toward action, the endpoint limit switches at both ends are coordinated with the pulse mechanism, and the action execution is monitored and adjusted through PLC. Endpoint limit switches are set at both ends, coordinated with the pulse mechanism, and the action execution is adjusted through PLC. When the number of pulses reaches the upper limit value first but does not reach the pre-position, it means that the wire diameter is small, and the action needs to be continued at this time; when the number of pulses does not reach the upper limit value, and the guide has been translated to the pre-position, it means that the wire diameter is large, and it is necessary to switch to the adjustment action before the guide, and finally complete the winding of the welding wire by the main turntable 104.

[0054] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An online coiling device for magnesium alloy extruded welding wire, comprising a fixed frame, characterized in that: Also includes processing components, The processing assembly includes a supporting seat, a rotating rod, a main rotating disk, a movable frame, a movable rod, a guide plate, a rotating component and a movable member. The supporting seat is fixedly connected to the fixed frame and is located on one side of the fixed frame. The rotating rod is connected to the fixed frame through the rotating component and is rotatably connected to the supporting seat and is located on a side of the fixed frame close to the supporting seat. The main rotating disk is arranged on the rotating rod and is located on one side of the rotating rod. The movable frame is connected to the fixed frame through the movable member and is located on one side of the fixed frame. The movable rod is fixedly connected to the movable frame and is located on one side of the movable frame. The guide plate is rotatably connected to the movable rod and is located on one side of the movable rod. The rotating member is arranged on the fixed frame and connected to the rotating rod. The movable member is arranged on the fixed frame and connected to the movable frame.

2. The magnesium alloy extruded welding wire online coiling device according to claim 1, characterized in that: The rotating component includes a mounting frame, a rotating motor and a transmission component. The mounting frame is fixedly connected to the fixed frame and is located on one side of the fixed frame; the rotating motor is fixedly connected to the mounting frame and is located on one side of the mounting frame; the transmission component is arranged on the rotating motor and is connected to the rotating rod.

3. The magnesium alloy extruded welding wire online coiling device according to claim 2, characterized in that: The transmission component includes a first transmission wheel, a second transmission wheel and a transmission belt. The first transmission wheel is connected to the output end of the rotating motor and is located on one side of the rotating motor; the second transmission wheel is fixedly connected to the rotating rod and is located on one side of the rotating rod; the transmission belt is sleeved on the first transmission wheel and the second transmission wheel.

4. The magnesium alloy extruded welding wire online coiling device according to claim 1, characterized in that: The movable member comprises a fixed frame and a guide motor, wherein the fixed frame is fixedly connected to the fixed frame and is located at one side of the fixed frame; the guide motor is fixedly connected to the fixed frame and is connected to the movable frame and is located at one side of the fixed frame close to the movable frame.

5. The magnesium alloy extruded welding wire online coiling device according to claim 1 is characterized in that: The processing assembly further comprises a limit block, which is arranged on the rotating rod and located at a side of the rotating rod close to the main rotating disk.

6. The magnesium alloy extruded welding wire online coiling device according to claim 1, characterized in that: The processing assembly also includes a pressing component, which includes a support frame, a pressing frame and a spring. The support frame is fixedly connected to the fixed frame and is located on one side of the fixed frame; the pressing frame is arranged on the support frame and is located on one side of the support frame; the spring is arranged on the support frame and connected to the pressing frame.

7. A method for online winding of magnesium alloy extruded welding wire, applicable to the online winding device for magnesium alloy extruded welding wire as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: The straightening mechanism is used to perform straightening treatment on the wire before it is put on the disc, and after the straightening treatment is completed, the wire is introduced onto the main turntable; The main turntable is started to rotate, and at the same time, the guide plate lags behind the main turntable in translation according to a certain ratio, and the ratio is that the guide plate lags behind the main turntable in translation by 1.5 turns; When the turntable rotates to near the end, about 3 turns away from the end, the pre-position switch is activated, and the guide motor reaches the end of the turntable at twice the normal speed; When the guide plate pauses at the end for 1.5 pulses, it performs a reversing action; Set the end point limit switches at both ends with pulses, and use PLC to monitor and adjust the action execution; Complete the winding of the welding wire on the winding drum.