An automatic wire feeding device for medium-speed wire feeding

Abstract

This application provides an automatic wire feeding device for medium-speed wire cutting, applicable to the field of electrical discharge machining (EDM) technology. The device includes: a lower arm; a guide and guide wheel cylinder mounted on the lower arm; a guide rail located below the lower arm; an adapter plate connected to the guide wheel cylinder and driven by the guide wheel cylinder to move along the guide rail; a guide wheel and conductive block mounted on the adapter plate, with the conductive block positioned above the guide wheel; a rotary cylinder mounted on the guide rail and moving along the guide rail; and a finger cylinder for clamping the wire, connected to the rotary cylinder and rotating around the rotary cylinder as an axis, moving in contact with the adapter plate when clamping the wire. The automatic wire feeding device provided in this application achieves automatic wire feeding, enabling control of the wire height and angle, allowing the wire to stop at any position. Furthermore, the adapter plate further reduces the operational control difficulty during wire feeding.

Description

Technical Field

[0001] This application relates to the field of electrical discharge machining (EDM) technology, and more particularly to an automatic wire feeding device for medium-speed wire cutting. Background Technology

[0002] Electrical discharge machining (EDM) is a machining method that utilizes electro-erosion. This method removes material through pulsed spark discharge between the tool electrode and the workpiece electrode, thereby shaping the material. In wire EDM, the electrode wire serves as the tool electrode, and the workpiece serves as the workpiece electrode. Under the excitation of a pulsed power supply, a spark discharge occurs, generating heat that melts or even vaporizes the workpiece. The resulting explosion ejects the removed material from the workpiece, which is then carried away by the working fluid and filtered.

[0003] Electrical discharge wire cutting (EDM) utilizes electrical discharge machining principles and can process many materials that are difficult to handle using conventional machining methods, such as high-hardness PCD materials. It can also process materials with high melting points, materials that require excessive energy to process using conventional methods, and brittle materials that are difficult to machine mechanically. Due to its wide applicability, high precision, and low cost, it has been widely used in the automotive, aerospace, and machine tool manufacturing industries.

[0004] In existing technologies, the wire feeding process is mainly achieved manually or by a conveyor belt. The conveyor belt clamps the wire and moves it. However, this method can only make the wire move in a straight line. In practical applications, the wire often needs to stop at various different positions, and the positions where the wire needs to stop are often not on the same straight line. Summary of the Invention

[0005] In view of the problems in the prior art, this application provides an automatic wire feeding device for medium-speed wire, which can at least partially solve the problems existing in the prior art.

[0006] The automatic wire feeding device provided in this application includes: a lower arm, a guide, a guide wheel cylinder, a guide rail, an adapter plate, a guide wheel, a conductive block, a rotary cylinder, and a finger cylinder for clamping the wire.

[0007] The guide and guide wheel cylinder are mounted on the lower arm;

[0008] The adapter plate is connected to the guide wheel cylinder and is driven by the guide wheel cylinder to move along the guide rail direction;

[0009] The guide wheel and conductive block are disposed on the adapter plate, with the conductive block located above the guide wheel.

[0010] The guide rail is located below the adapter plate;

[0011] The rotary cylinder is mounted on the guide rail and moves along the direction of the guide rail;

[0012] The finger cylinder is connected to the rotary cylinder and rotates around the rotary cylinder as an axis. When clamping the wire, it rotates in contact with the adapter plate.

[0013] Before the wire is fed, the adapter plate is located below the guide.

[0014] After the wire feeding begins, the guide wheel cylinder drives the adapter plate away from the guide.

[0015] When the finger cylinder moves in contact with the adapter plate, the clamping position of the wire does not change along the guide rail direction.

[0016] It also includes: a detection plate for detecting the potential change of the finger cylinder, which is disposed on the rotary cylinder;

[0017] When the potential of the finger cylinder changes, the rotary cylinder is controlled to move along the guide rail.

[0018] It also includes: an insulating gasket, disposed on the guide rail;

[0019] The rotary cylinder is mounted on the gasket and moves along the guide rail with the gasket.

[0020] It also includes: a detection plate for detecting the potential difference between the finger cylinder and the guide rail, which is disposed on the rotary cylinder;

[0021] When the potential difference between the finger cylinder and the guide rail reaches a preset threshold, the rotary cylinder is controlled to move along the guide rail.

[0022] The guide rail includes: a guide rail body, a slide rail disposed on the guide rail body, and a movable chain;

[0023] One end of the movable chain is engaged with the slide rail and moves along the slide rail, while the other end is connected to the gasket.

[0024] The guide rail body and the slide rail disposed on the upper part of the guide rail body;

[0025] The gasket engages with the slide rail and moves along the slide rail.

[0026] It also includes an angle sensor for detecting the rotation angle of the rotary cylinder, which is mounted on the rotary cylinder.

[0027] It also includes a controller connected to the angle sensor, which controls the movement and rotation of the rotary cylinder based on the detection results of the angle sensor.

[0028] The automatic wire feeding device provided in this application comprises a lower arm, a guide and guide wheel cylinder mounted on the lower arm, a guide rail located below the lower arm, a transfer plate connected to the guide wheel cylinder and driven by the guide wheel cylinder to move along the guide rail direction, guide wheels and conductive blocks mounted on the transfer plate, a rotary cylinder mounted on the guide rail and moving along the guide rail direction, and a finger cylinder for clamping the wire, connected to the rotary cylinder and rotating around the rotary cylinder as an axis. When clamping the wire, the finger cylinder moves in contact with the transfer plate, thus realizing automatic wire feeding. It can control the height and angle of the wire, allowing the wire to stop at any position. At the same time, the setting of the transfer plate further reduces the difficulty of operation and control during wire feeding. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of an automatic wire feeding device for medium-speed wire feeding provided in some embodiments of this application;

[0031] Figure 2 The automatic wire feeding device provided in some embodiments of this application is in... Figure 1 A partial schematic diagram of the area inside the circle;

[0032] Figure 3 A schematic diagram illustrating the state of the automatic wire feeding device for medium-speed wire feeding in some embodiments of this application during the wire clamping process;

[0033] Figure 4 A schematic diagram illustrating the state of the automatic wire feeding device for medium-speed wire feeding in some embodiments of this application during the wire clamping process;

[0034] Figure 5 A schematic diagram illustrating the state of the automatic wire feeding device for medium-speed wire feeding in some embodiments of this application during the wire clamping process;

[0035] Figure 6 A schematic diagram illustrating the state of the automatic wire feeding device for medium-speed wire feeding in some embodiments of this application during the wire clamping process;

[0036] Figure 7 This is a schematic diagram showing the state of the automatic wire feeding device provided in some embodiments of this application during the wire clamping process. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0038] The electrical discharge cutting device mainly consists of a drum, a lower arm, and an upper arm. The guide is located at one end of the lower arm. Wire feeding is the process of feeding the wire through the guide to the drum so that the drum clamps the wire.

[0039] In existing technologies, when using a conveyor belt for yarn feeding, because the rollers are at a certain height compared to the conveyor belt, after the conveyor belt has moved the yarn a certain distance, the operator still needs to manually remove the yarn from the conveyor belt and feed it into the rollers for clamping. Furthermore, after the yarn passes through the guide, the operator also needs to manually place the yarn into the clamping device on the conveyor belt.

[0040] The automatic wire feeding device provided in this application can automatically clamp the wire passing through the guide and adjust the height and angle of the wire while feeding it, so that the wire can stay at any position without manual intervention and can be fed into the roller to clamp the wire.

[0041] Figure 1 This is a schematic diagram of the structure of an automatic wire feeding device provided in some embodiments of this application. Figure 2 The automatic wire feeding device provided in some embodiments of this application is in... Figure 1 A partial schematic diagram of the area inside the circle, as shown below. Figure 1 and Figure 2 As shown, the automatic wire feeding device provided in this application includes: a lower arm 101, a guide 102, a guide wheel cylinder 103, a guide rail 104, an adapter plate 105, a guide wheel 106, a conductive block 107, a rotary cylinder 108, and a finger cylinder 109.

[0042] The guide 102 and the guide wheel cylinder 103 are mounted on the lower arm 101.

[0043] Specifically, the guide 102 is located at one end of the lower arm 101, and the guide wheel cylinder 103 is also located on the lower arm 101, with a horizontal gap between it and the guide 102, so as to drive the adapter plate 105 to move between the fixed position of the guide wheel cylinder 103 and directly below the guide 102.

[0044] The adapter plate 105 is connected to the guide wheel cylinder 103 and is driven by the guide wheel cylinder 103 to move along the direction of the guide rail 104; the adapter plate 105 is provided with a guide wheel 106 and a conductive block 107, with the conductive block 107 located above the guide wheel 106;

[0045] Specifically, the guide wheel cylinder 103 drives the adapter plate 105 to move along the guide rail 104, thereby moving the guide wheel 106 and conductive block 107 on the adapter plate 105. The guide wheel 106 is located below the conductive block 107, and the guide wheel 106 and conductive block 107 are not vertically arranged. The guide wheel 106 is farther from the guide 102 than the conductive block 107, and the line connecting the edge of the conductive block 107 and the guide wheel 106 near the guide 102 is an arc. The wire passing through the guide 102 can be arranged along the outer edge of the guide wheel 106 and conductive block 107. The guide wheel 106 and conductive block 107 provide support for the wire, thereby smoothly changing the wire from a vertical direction to a horizontal direction. This achieves the change of wire direction while preventing wire breakage, wear, etc., due to sudden changes in direction. The number of conductive blocks 107 can be set according to actual needs, such as two, but this application is not limited to this.

[0046] In one embodiment, before wire feeding, the adapter plate 105 is located below the guide 102; after wire feeding begins, the guide wheel cylinder 103 drives the adapter plate 105 away from the guide 102.

[0047] Specifically, before wire feeding, the adapter plate 105 is located directly below the guide 102. The wire passing through the guide 102 is tangent to the conductive block 107 and changes from a vertical to a horizontal direction via the conductive block 107 and the guide wheel 106. When feeding the wire, the guide wheel cylinder 103 drives the adapter plate 105 to move away from the guide 102 to prevent it from affecting the wire clamping of the finger cylinder 109. The finger cylinder 109 clamps the wire directly below the guide 102.

[0048] After the finger cylinder 109 stops rotating and is no longer in contact with the adapter plate 105, the adapter plate 105, the guide wheel 106 and the conductive block 107 on the adapter plate move towards the guide 102 under the drive of the guide wheel cylinder 103, and provide support for the wire again, so that the wire can maintain the trend of gradually changing from the vertical direction, and avoid the occurrence of wire breakage, wear and other situations due to sudden change in direction.

[0049] The guide rail 104 is located below the adapter plate 105;

[0050] Specifically, both the guide rail 104 and the lower arm 101 are connected to the frame of the electrical discharge cutting device. The guide rail 104 is located below the adapter plate 105 and is arranged parallel to the lower arm 101. The guide rail 104 is used to realize the horizontal movement of the wire.

[0051] The rotary cylinder 108 is mounted on the guide rail 104 and can move along the direction of the guide rail 104;

[0052] Specifically, the rotary cylinder 108 can be directly or indirectly mounted on the guide rail 104 and move along the guide rail.

[0053] In one embodiment, the automatic wire feeding device provided in this application further includes: an insulating pad 110 disposed on a guide rail 104; and a rotary cylinder 108 disposed on the pad 110 and moving along the guide rail 104 with the pad 110.

[0054] Specifically, the gasket 110 engages with the guide rail 104, thereby moving along the guide rail 104. The rotary cylinder 108 is fixedly connected to the gasket 110, thereby moving along the direction of the guide rail 104 under the drive of the gasket 110.

[0055] In one embodiment, such as Figure 1 As shown, the guide rail 104 includes a guide rail body 1040, a slide rail 1041 disposed on the guide rail body 1040, and a movable chain 1042; one end of the movable chain 1042 is engaged with the slide rail 1041 and moves along the slide rail 1041, and the other end is connected to the gasket 110.

[0056] Specifically, the guide rail body 1040 is a long strip-shaped track, the gasket 110 is engaged with the guide rail body 1040, and the slide rail 1041 is a protrusion on the surface of the guide rail body, which can be located on the two sides adjacent to the side engaged with the gasket 110, or on the side opposite to the gasket 110. One end of the chain 1042 is engaged with the slide rail 1041 at the lower part of the guide rail 104, and bends upward at one end of the guide rail body 1040 so that the other end of the chain 1042 is connected to the gasket 110 above the guide rail 104. When the portion of chain 1042 engaged with slide rail 1041 moves to the left in the figure, the pad 110 moves to the right in the figure under the tension of chain 1042; when the portion of chain 1042 engaged with slide rail 1041 moves to the right in the figure, the pad 110 moves to the left in the figure under the thrust of chain 1042. The direction of movement of chain 1042 along slide rail is opposite to the direction of movement of pad 110.

[0057] In another embodiment, the guide rail includes: a guide rail body 1040 and a slide rail (not shown) disposed on the upper part of the guide rail body; the gasket 110 engages with the slide rail and moves along the slide rail.

[0058] Specifically, a slide rail can be provided on the upper part of the guide rail body 1040, and a driving device can be provided on the shim 110, so that the shim 110 can move along the slide rail under its own power.

[0059] The rotary cylinder 108 and the gasket 110 can also move along the guide rail 104 in other ways, such as by a conveyor belt. This application does not limit the specific movement of the rotary cylinder 108 and the gasket 110.

[0060] The finger cylinder 109 is used for clamping the wire and is connected to the rotary cylinder 108. It rotates around the rotary cylinder 108 as an axis. When clamping the wire, it rotates in contact with the adapter plate 105.

[0061] Specifically, the finger cylinder 109 clamps the wire by opening and closing the finger portion. After clamping the wire, the finger cylinder 109 rotates around the rotary cylinder 108 as an axis under the drive of the rotary cylinder 108, and moves along the guide rail 104 with the rotary cylinder 108. After clamping the wire, the finger cylinder 109 rotates and translates for a period of time while adhering to the edge of the adapter plate 105, and is tangent to the edge of the adapter plate 105 during the rotation.

[0062] By setting the edge of the adapter plate 105 to a suitable shape and rotating the finger cylinder 109 in contact with the adapter plate 105, the finger cylinder 109 can automatically move along a reasonable path without requiring control of changes in angle or position. During the movement, the wire clamping position is always at a suitable height, and the rotary cylinder 108 always has a suitable horizontal displacement. This prevents the rotation angle or horizontal displacement of the rotary cylinder 108 from being unreasonable, which could lead to excessive or insufficient wire tension, causing wire feeding failure or even safety accidents. This improves the success rate of wire feeding and greatly reduces the difficulty of control.

[0063] In one embodiment, when the finger cylinder 109 moves in contact with the adapter plate 105, the clamping position does not change along the direction of the guide rail 104.

[0064] Specifically, the edge of the adapter plate 105 near the guide 102 can be set into a specific arc shape according to the length of the finger cylinder 109. This ensures that when the finger cylinder 109 moves in contact with the adapter plate 105, the wire clamping position only undergoes vertical displacement, without any change in position along the guide rail 104. This allows the wire to precisely engage with the returning conductive block 107 and guide wheel 106 when the adapter plate 105 moves back to the right after the finger cylinder 109 has moved a certain distance, thus preventing sudden tension changes.

[0065] However, this application is not limited to this. For example, an angle sensor can be set to detect the current rotation angle of the rotary cylinder 108, and a controller can be set to store a motion curve in advance. The motion curve includes the rotation angle of the rotary cylinder 108 at each displacement, and the movement and rotation of the rotary cylinder 108 can be controlled according to the detection result of the angle sensor. In addition, a certain threshold can be set for the movement distance of the wire clamping position, so that when the finger cylinder 109 rotates, the movement distance is controlled within the threshold, rather than necessarily keeping the wire clamping position completely unchanged in the direction along the guide rail 104.

[0066] In one embodiment, the automatic wire feeding device provided in this application further includes a detection plate 111, which is disposed on a rotary cylinder 108.

[0067] When the rotary cylinder 108 is directly mounted on the guide rail 104, the detection plate 111 is used to detect the potential change of the finger cylinder 109. When the conductive wire reaches the finger cylinder 109, the potential of the finger cylinder 109 changes. After the detection plate 111 detects the potential change of the finger cylinder 109, it controls the open finger cylinder 109 to clamp and causes the rotary cylinder 108 to move along the guide rail 104 towards the roller.

[0068] When the rotary cylinder 108 is positioned on the pad 110, the detection plate 111 detects the potential difference between the finger cylinder 109 and the guide rail 104. When the conductive wire reaches the finger cylinder 109, the potential of the finger cylinder 109 changes. However, since the pad 110 is non-conductive, the potential of the guide rail 104 remains constant, creating a potential difference between the finger cylinder 109 and the guide rail 104. Once the detection plate 111 detects this potential difference, it controls the open finger cylinder 109 to clamp, and moves the pad 110 and the rotary cylinder 108 along the guide rail 104 towards the roller. Furthermore, a threshold value can be set as needed. When the potential difference between the finger cylinder 109 and the guide rail 104 reaches the threshold and remains stable, the finger cylinder 109 is then clamped, thus preventing clamping failure as soon as the wire reaches the finger cylinder 109.

[0069] In one embodiment, the automatic wire feeding device provided in this application further includes a protective drag chain 112, which is disposed at one end of the guide rail 104.

[0070] Specifically, the protective drag chain 112 is used to wrap the air pipes and electrical wires of the air circuit, preventing the air pipes and wires from getting stuck due to the reciprocating motion of the guide rail 104, which could lead to equipment failure. At the same time, it also reduces the degree of external influence on the air pipes and wires.

[0071] The automatic wire feeding device provided in this application comprises a lower arm, a guide and guide wheel cylinder mounted on the lower arm, a guide rail located below the lower arm, a transfer plate connected to the guide wheel cylinder and driven by the guide wheel cylinder to move along the guide rail direction, guide wheels and conductive blocks mounted on the transfer plate, a rotary cylinder mounted on the guide rail and moving along the guide rail direction, and a finger cylinder for clamping the wire, connected to the rotary cylinder and rotating around the rotary cylinder as an axis. When clamping the wire, the finger cylinder moves in contact with the transfer plate, thus realizing automatic wire feeding. It can control the height and angle of the wire, allowing the wire to stop at any position. At the same time, the setting of the transfer plate further reduces the difficulty of operation and control during wire feeding.

[0072] Figures 3 to 7This is a schematic diagram illustrating the state of the automatic wire feeding device provided in some embodiments of this application during the wire clamping process. Figures 3 to 7 The diagram within the box shows the opening and closing of the rollers in the corresponding states. Below, we will combine... Figures 3 to 7 The working principle of the automatic wire feeding device provided in this application is explained as follows:

[0073] Before wire feeding, when the EDM device is in normal processing mode, the guide wheel cylinder 103 is closed, and the adapter plate 105 is located below the guide 102. At this time, the wire passes through the guide 102, contacts the conductive block 107, and is then guided by the guide wheel 106 to change the wire from a vertical direction to a horizontal direction. At this time, the rotary cylinder 108 is closed, and the finger cylinder 109 does not affect the normal operation of the wire.

[0074] When feeding the silk, such as Figure 3 As shown, the guide wheel cylinder 103 is activated, causing the adapter plate 105 to move away from the guide 102, so that the position below the guide 102 is not affected by the guide wheel 106, etc. At this time, the rotary cylinder 108 is activated, lifting the finger cylinder 109 below the guide 102. The finger cylinder 109 is activated, and the fingers are spread to clamp the wire. When the wire passes through the guide 102 and reaches the finger cylinder 109, the detection plate 111 detects a change in the potential of the finger cylinder 109 or a potential difference between the finger cylinder 109 and the guide rail 104, controls the finger cylinder 109 to close, clamping the wire, and activates the rotary cylinder 108 to rotate and move along the guide rail 104. During the rotation of the rotary cylinder 108, the finger cylinder 109 moves close to the adapter plate 105, while the wire clamping position moves basically vertically downward. Figure 4 As shown, subsequently, the rotary cylinder 108 closes, and the guide wheel cylinder 103 opens, moving the adapter plate 105 towards the guide 102. The guide wheel 106 re-constrains the position of the wire, while the wire continues to move towards the roller 200 with the finger cylinder 109. After the wire is fed below the roller 200, as... Figure 5 , Figure 6 and Figure 7 As shown, the rotary cylinder 108 is activated, driving the finger cylinder 109 to rotate, lifting the finger cylinder 109 and raising the wire. The roller 200 then opens to clamp the wire. After the roller 200 clamps the wire, the finger cylinder 109 starts to open, releasing the wire and allowing it to detach from the wire feeding device.

[0075] The opening and closing of the finger cylinder 109 and the opening of the rotary cylinder 108 can also be manually controlled.

[0076] As described above, the automatic wire feeding device provided in this application comprises a lower arm, a guide and guide wheel cylinder mounted on the lower arm, a guide rail mounted below the lower arm, a transfer plate connected to the guide wheel cylinder and driven by the guide wheel cylinder to move along the guide rail direction, a guide wheel and conductive block mounted on the transfer plate, a rotary cylinder mounted on the guide rail and moving along the guide rail direction, and a finger cylinder for clamping the wire, connected to the rotary cylinder and rotating around the rotary cylinder as an axis. When clamping the wire, the finger cylinder moves in contact with the transfer plate, thus realizing automatic wire feeding. It can control the height and angle of the wire, allowing the wire to stop at any position. At the same time, the setting of the transfer plate further reduces the difficulty of operation and control during wire feeding.

[0077] In the description of this specification, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0078] The terms "an embodiment," "a specific embodiment," "some embodiments," "for example," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of this application, and the order of steps is not limited and may be adjusted appropriately as needed.

[0079] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0080] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An automatic wire feeding device for medium-speed wire, characterized in that, include: Lower arm, guide, guide wheel cylinder, guide rail, adapter plate, guide wheel, conductive block, rotary cylinder and finger cylinder for wire clamping; The guide and guide wheel cylinder are mounted on the lower arm; The adapter plate is connected to the guide wheel cylinder and is driven by the guide wheel cylinder to move along the guide rail direction; The guide wheel and conductive block are disposed on the adapter plate, with the conductive block located above the guide wheel. The guide rail is located below the adapter plate; The rotary cylinder is mounted on the guide rail and moves along the direction of the guide rail; The finger cylinder is connected to the rotary cylinder and rotates around the rotary cylinder as an axis. When clamping the wire, it rotates in contact with the adapter plate. It also includes: a detection plate for detecting the potential change of the finger cylinder, which is disposed on the rotary cylinder; When the potential of the finger cylinder changes, the rotary cylinder is controlled to move along the guide rail.

2. The automatic wire feeding device according to claim 1, characterized in that, Before wire feeding, the adapter plate is located below the guide. After the wire feeding begins, the guide wheel cylinder drives the adapter plate away from the guide.

3. The automatic wire feeding device according to claim 1, characterized in that, When the finger cylinder moves in contact with the adapter plate, the clamping position does not change along the guide rail direction.

4. The automatic wire feeding device according to claim 1, characterized in that, Also includes: An insulating gasket is provided on the guide rail; The rotary cylinder is mounted on the gasket and moves along the guide rail with the gasket.

5. The automatic wire feeding device according to claim 4, characterized in that, Also includes: A detection plate for detecting the potential difference between the finger cylinder and the guide rail is disposed on the rotary cylinder; When the potential difference between the finger cylinder and the guide rail reaches a preset threshold, the rotary cylinder is controlled to move along the guide rail.

6. The automatic wire feeding device according to claim 4, characterized in that, The guide rail includes: a guide rail body, a slide rail disposed on the guide rail body, and a movable chain; One end of the movable chain is engaged with the slide rail and moves along the slide rail, while the other end is connected to the gasket.

7. The automatic wire feeding device according to claim 4, characterized in that, The guide rail includes: a guide rail body and a slide rail disposed on the upper part of the guide rail body; The gasket engages with the slide rail and moves along the slide rail.

8. The automatic wire feeding device according to claim 1, characterized in that, Also includes: An angle sensor for detecting the rotation angle of the rotary cylinder is installed on the rotary cylinder.

9. The automatic wire feeding device according to claim 8, characterized in that, Also includes: The controller is connected to the angle sensor and controls the movement and rotation of the rotary cylinder based on the detection results of the angle sensor.

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