A wire feeding and rewinding detection mechanism for a wire threading wire cutting machine tool

Abstract

The present invention relates to the technical field of wire cutting machine tools, and specifically discloses a wire feeding and rewinding detection mechanism for a wire threading wire cutting machine tool, including: a fixed back plate for connecting and fixing with the wire cutting machine tool and a first pulley for wire inlet; further including: a fourth pulley, the fourth pulley is fixedly installed on the right surface of the top of the fixed back plate, and a third pulley is arranged on the left side of the fourth pulley. The central axes of the fourth pulley and the third pulley are arranged on the same horizontal plane, and the side of the third pulley is fitted and inserted into the side of the fourth pulley; a top sleeve, the top sleeve is arranged below the left side of the fourth pulley, and the top sleeve is slidably connected up and down on the outside of the fixed back plate. This wire feeding and rewinding detection mechanism for the wire threading wire cutting machine tool can automatically adjust the limiting use of the wire, is convenient for limiting the wire, can correct the bent and inclined wire, and is beneficial to improving the wire threading success rate.

Description

Technical Field

[0001] The present invention relates to the technical field of wire cutting machines, and more particularly to the technical field of automatic wire threading detection for wire cutting machines, and specifically to a wire feeding and rewinding detection mechanism for a wire cutting machine with wire threading. Background Art

[0002] A wire cutting machine is a high-precision processing equipment widely used in the field of metal cutting and processing. Threading the wire is one of the key steps in the preparatory work of the wire cutting machine. The correct wire threading process directly affects the subsequent cutting accuracy and effect. With the continuous development of industrial technology, using only automatic wire threading can improve industrial processing efficiency. During the automatic wire threading process, it is necessary to detect the correctness of the wire threading to rewind the wire when the wire threading is inclined incorrectly and re-thread the wire;

[0003] For example, in the Chinese patent with the application number 201911203847.9, an automatic wire threading and rewinding detection mechanism for a wire cutting machine is disclosed, including a plate body. A first pulley is rotatably connected to the surface of the plate body through a rotating shaft. A second pulley is rotatably connected to the surface of the plate body and on the left side of the first pulley. A first connecting plate is rotatably connected to the bottom of the second pulley, and a first spring is fixedly connected to the bottom of the first connecting plate; through the setting that the centers of the first pulley and the second pulley are on the same horizontal line, it can ensure that the direction of the electrode wire is vertically downward when it is sent out between the first pulley and the second pulley, so that the molybdenum wire can smoothly enter the limiting mechanism. The through hole inside the limiting mechanism can keep the wire in a vertical state, increasing the success rate of automatic wire threading, and thus effectively solving the problem in the prior art that the direction of the molybdenum wire when it comes out of the tangent point is mostly inclined and cannot be vertically downward, and the molybdenum wire is easily bent during the wire feeding process, reducing the success rate of automatic wire threading;

[0004] However, in the actual automatic wire threading process, the current rewinding detection mechanism still has certain drawbacks, such as:

[0005] Adjusting the pulley through an elastic element to limit the wire, but its elastic effect always applies a force to the wire during both the wire threading process and the rewinding process, affecting the rapid passage of the wire and being not conducive to improving the efficiency of automatic wire feeding;

[0006] Directly performing bending detection, the wire passing through the pulley directly enters the conduit for use, affecting the success rate of wire threading;

[0007] After the wire is bent, the automatic rewinding only rewinds the wire and then re-threads it, and cannot automatically straighten the wire so that the wire can quickly complete the wire threading for use.

[0008] Therefore, we propose a wire feeding and rewinding detection mechanism for a wire cutting machine with wire threading to facilitate solving the problems raised above. Summary of the Invention

[0009] The object of the present invention is to provide a wire feeding and rewinding detection mechanism for a wire threading wire cutting machine, so as to solve the problems in the above-mentioned background technology that in the current wire feeding and rewinding detection mechanism, the wire is always under force, affecting the rewinding and wire threading efficiency, there is no limiting mechanism, and the wire cannot be corrected, which is not conducive to improving the wire threading success rate.

[0010] To achieve the above object, the present invention provides the following technical solution: A wire feeding and rewinding detection mechanism for a wire threading wire cutting machine, including: a fixed back plate for connecting and fixing with the wire cutting machine and a first pulley for wire inlet.

[0011] It further includes:

[0012] A fourth pulley, the fourth pulley is fixedly installed on the right side surface of the top of the fixed back plate, and a third pulley is arranged on the left side of the fourth pulley. The central axes of the fourth pulley and the third pulley are arranged on the same horizontal plane, and the side of the third pulley is fittingly inserted into the side of the fourth pulley.

[0013] A top sleeve, the top sleeve is arranged below the left side of the fourth pulley, and the top sleeve is slidably connected up and down on the outside of the fixed back plate.

[0014] A bottom sleeve, the bottom sleeve is located directly below the top sleeve, and a contact funnel is arranged on the top of the bottom sleeve. A sensor is arranged between the bottom sleeve and the contact funnel, and a conduit is connected to the bottom of the bottom sleeve.

[0015] Preferably, a second pulley is arranged at the lower left corner of the fixed back plate. The second pulley, the first pulley, the third pulley and the fourth pulley are used for wire inlet and limiting, and the pulley grooves of the second pulley, the first pulley, the third pulley and the fourth pulley are located in the same vertical plane.

[0016] Preferably, a connecting rod is rotatably installed on the front side of the middle part of the fixed back plate. A fixing frame is fixed at the top end of the connecting rod. The third pulley is rotatably installed inside the fixing frame. The inner end of the connecting rod is rotatably connected to the first telescopic rod, and the end of the first telescopic rod is rotatably connected to the surface of the fixed back plate.

[0017] Preferably, the internal structure of the top sleeve is in a funnel shape. Sliders are symmetrically and fixedly installed on the rear side of the top sleeve, and the top sleeve is slidably connected to the guide rail fixed on the surface of the fixed back plate through the sliders.

[0018] Preferably, it further includes a connecting cylinder. The connecting cylinder is detachably arranged between the top sleeve and the bottom sleeve. The upper and lower ends of the connecting cylinder are threadedly connected to the top sleeve and the bottom sleeve respectively, and the thread structures at the upper and lower ends of the connecting cylinder have opposite screwing directions.

[0019] Preferably, a core plate is integrally and fixedly arranged in the middle of the connecting cylinder, and a threading hole penetrating through the center of the connecting cylinder is arranged in the middle of the core plate. The threading hole corresponds to the inner central through holes of the top sleeve and the bottom sleeve up and down.

[0020] Preferably, an empty groove is formed by enclosing between the threading hole and the connecting cylinder. A support frame is arranged inside the empty groove. A clamping plate is fixedly arranged on the inner side surface of the support frame. The clamping plate is telescopically connected to the inner side of the core plate. The side shape structure of the support frame is an inverted right triangle structure. The inner side surface of the support frame is elastically connected to the core plate through a spring.

[0021] Preferably, an extrusion plate is attached to the outer side of the support frame. The inner side surface of the extrusion plate is inclined. A magnetic plate is embedded in the inner side surface of the extrusion plate. The extrusion plate is magnetically adsorbed to the support frame through the magnetic plate. The extrusion plate is a vertically sliding structure inside the empty groove.

[0022] Preferably, connecting plates are symmetrically and fixedly installed on the side edges of the extrusion plate. An adjusting rod is threadedly connected to the inner sides of the connecting plates. An internal gear is fixedly installed at the top end of the adjusting rod. A gear ring is meshed with the outer side of the internal gear. An external gear is meshed with the outer side of the gear ring. The bottom of the external gear is connected to a driving motor fixed to the top of the connecting cylinder.

[0023] Preferably, an installation frame located outside the first pulley is arranged at the upper left corner of the fixed back plate. A pressing block is rotatably installed at the outer bottom of the installation frame. A rubber pad is fixed to the top end of the pressing block. The end of the rubber pad is correspondingly clamped with the wheel groove of the first pulley. A second telescopic rod is rotatably installed at the outer top of the installation frame. The top end of the second telescopic rod is rotatably connected to the top of the pressing block.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects: The wire feeding and rewinding detection mechanism of the wire cutting machine tool can automatically adjust the limit use of the wire, which is convenient for limiting the wire, can correct the bent and inclined wire, and is beneficial to improving the wire threading success rate;

[0025] 1. In this solution, a third pulley, a fixed frame, a connecting rod and a first telescopic rod are provided. By the telescopic use of the first telescopic rod, the connecting rod can be driven to rotate outside the fixed back plate, so as to drive the fixed frame and the third pulley to rotate, the distance between the third pulley and the fourth pulley can be adjusted, and different wires can be used, which is convenient for limiting the use of the wire;

[0026] 2. In this solution, a top sleeve and a bottom sleeve are provided. The top sleeve is arranged below between the third pulley and the fourth pulley. The silk thread is lowered through the funnel structure inside the top sleeve, and the top sleeve can limit the silk thread to facilitate threading. Moreover, the silk thread passing through the top sleeve can enter the inside of the bottom sleeve, and the bottom sleeve is connected to a conduit to lower the silk thread.

[0027] Further, a contact funnel and a sensor are provided at the inner top of the bottom sleeve. The sensor senses the top of the contact funnel. The sensor can be a vibration sensor, a pressure sensor, etc. When sensing the vibration or pressure change of the contact funnel, it judges that the silk thread is inclined and thus controls the rewinding.

[0028] 3. In this solution, a connecting cylinder, a core plate and a threading hole are provided. The connecting cylinder is fixedly connected between the top sleeve and the bottom sleeve by threaded connection, and the thin wire can be limited and unwound through the threading hole penetrating through the inside of the connecting cylinder.

[0029] Further, an elastic structure is formed by a support frame through a spring on the outside of the core plate. The support frame inserts into the inside of the core plate through a clamping plate, and the silk thread is squeezed by the clamping plate, which can correct the silk thread when the silk thread needs to be rewound to facilitate threading again.

[0030] 4. In this solution, a pressing plate, a magnetic plate and an adjusting rod are provided. The pressing plate is adsorbed between the support frame through the magnetic plate. When the pressing plate slides down, it can pull the support frame outward. And through magnetic adsorption, jamming can be avoided. At the same time, the outer gear drives the gear ring to facilitate driving the adjusting rod simultaneously for easy adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0032] Figure 1 is a schematic structural diagram of the left side of the overall front view of the present invention;

[0033] Figure 2 is a schematic structural diagram of the right side of the overall front view of the present invention;

[0034] Figure 3 is a schematic structural diagram of the overall front cross-section of the present invention;

[0035] Figure 4 is a schematic structural diagram of the disassembled top sleeve, connecting cylinder and bottom sleeve of the present invention;

[0036] Figure 5 is a schematic structural diagram of the overall cross-section of the connecting cylinder of the present invention;

[0037] Figure 6 Schematic diagram of the overall structure of the support frame and the extrusion plate of the present invention;

[0038] Figure 7 Schematic diagram of the overall top view with partial section of the present invention;

[0039] Figure 8 Schematic diagram of the disassembled state structure of the connecting cylinder of the present invention.

[0040] In the figure: 1, fixed back plate; 2, first pulley; 3, second pulley; 4, third pulley; 5, fourth pulley; 6, fixed frame; 7, connecting rod; 8, first telescopic rod; 9, top sleeve; 10, connecting cylinder; 11, bottom sleeve; 12, conduit; 13, contact funnel; 14, sensor; 15, slider; 16, guide rail; 17, core plate; 18, wire threading hole; 19, empty slot; 20, support frame; 21, clamping plate; 22, spring; 23, extrusion plate; 24, magnetic plate; 25, connecting plate; 26, adjusting rod; 27, internal gear; 28, gear ring; 29, external gear; 30, drive motor; 31, mounting bracket; 32, pressing block; 33, rubber pad; 34, second telescopic rod. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention, so as to fully understand how the present application uses technical means to solve technical problems and achieve the realization process of technical effects and implement accordingly. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0042] Please refer to Figure 1-8 , the present invention provides the following technical solutions:

[0043] A wire threading and cutting machine wire feeding and rewinding detection mechanism, comprising: a fixed back plate 1, a first pulley 2, a second pulley 3, a third pulley 4, a fourth pulley 5, a fixed frame 6, a connecting rod 7, a first telescopic rod 8, a top sleeve 9, a connecting cylinder 10, a bottom sleeve 11, a conduit 12, a contact funnel 13, a sensor 14, a slider 15, a guide rail 16, a core plate 17, a wire threading hole 18, an empty slot 19, a support frame 20, a clamping plate 21, a spring 22, an extrusion plate 23, a magnetic plate 24, a connecting plate 25, an adjusting rod 26, an internal gear 27, a gear ring 28, an external gear 29, a drive motor 30, a mounting bracket 31, a pressing block 32, a rubber pad 33 and a second telescopic rod 34;

[0044] Among them: A first pulley 2 is rotatably installed on the left side of the middle part of the fixed backboard 1. A fourth pulley 5 is fixedly installed on the right side surface of the top of the fixed backboard 1. And a third pulley 4 is arranged on the left side of the fourth pulley 5. The central axes of the fourth pulley 5 and the third pulley 4 are arranged on the same horizontal plane. The side of the third pulley 4 is fitted and inserted into the side of the fourth pulley 5. A second pulley 3 is arranged at the lower left corner of the fixed backboard 1. The second pulley 3, the first pulley 2, the third pulley 4 and the fourth pulley 5 are used for limiting the entry of the silk thread. The pulley grooves of the second pulley 3, the first pulley 2, the third pulley 4 and the fourth pulley 5 are located in the same vertical plane.

[0045] In a specific application scenario, the silk thread passes through the second pulley 3 and the first pulley 2 once via the rewinding mechanism and enters between the third pulley 4 and the fourth pulley 5. Through the limitation of the third pulley 4 and the fourth pulley 5, the silk thread is led downward to facilitate automatic threading and wire feeding.

[0046] Among them: A connecting rod 7 is rotatably installed on the front side of the middle part of the fixed backboard 1. A fixing bracket 6 is fixed at the top end of the connecting rod 7. The third pulley 4 is rotatably installed inside the fixing bracket 6. The inner side of the end of the connecting rod 7 is rotatably connected to a first telescopic rod 8. The end of the first telescopic rod 8 is rotatably connected to the surface of the fixed backboard 1.

[0047] In a specific application scenario, through the telescoping of the first telescopic rod 8, the angle of the connecting rod 7 can be adjusted by means of the sequential rotational connection between the fixed backboard 1, the first telescopic rod 8, the connecting rod 7 and the fixed backboard 1, so as to rotate the angle of the fixing bracket 6 and adjust the positions of the fixing bracket 6 and the third pulley 4, so as to adjust the spacing dimension between the third pulley 4 and the fourth pulley 5. And the third pulley 4 is fitted inside the pulley groove of the fourth pulley 5, which can stably limit the silk thread to facilitate the unwinding and threading of the silk thread. And during rewinding, the silk thread can be clamped to prevent the silk thread roll from loosening after rewinding.

[0048] Among them: The top sleeve 9 is arranged below the left side of the fourth pulley 5. And the top sleeve 9 is slidably connected up and down on the outside of the fixed backboard 1. The internal structure of the top sleeve 9 is in a funnel shape. The rear side of the top sleeve 9 is symmetrically fixedly installed with sliders 15. And the top sleeve 9 is slidably connected correspondingly with a guide rail 16 fixed on the surface of the fixed backboard 1 through the sliders 15. The bottom sleeve 11 is located directly below the top sleeve 9. And a contact funnel 13 is arranged at the top of the bottom sleeve 11. A sensor 14 is arranged between the bottom sleeve 11 and the contact funnel 13. A conduit 12 is connected to the bottom of the bottom sleeve 11.

[0049] In a specific application scenario, the internal funnel-shaped structure of the top sleeve 9 first limits the silk thread below. When the silk thread is bent to a certain extent, it can slide down through the funnel limit to the central through hole, limiting and straightening the silk thread to a certain degree. When the silk thread is lowered into the bottom sleeve 11, threading is carried out through the through hole inside the bottom sleeve 11, so as to continue to lower the thread through the conduit 12 to ensure the completion of automatic threading. When the silk thread is bent, the silk thread will contact the contact funnel 13. A sensor 14 is arranged between the contact funnel 13 and the bottom sleeve 11. The sensor 14 can be a pressure sensor, a vibration sensor, etc. When the sensor 14 senses a continuous variable on the surface of the contact funnel 13, the unwinding mechanism automatically rewinds to rewind the silk thread for reuse of threading.

[0050] Wherein: The connecting cylinder 10 is detachably arranged between the top sleeve 9 and the bottom sleeve 11. The connection methods between the upper and lower ends of the connecting cylinder 10 and the top sleeve 9 and the bottom sleeve 11 are both threaded connections, and the screwing directions of the threaded structures at the upper and lower ends of the connecting cylinder 10 are opposite. An inner core plate 17 is integrally and fixedly arranged in the middle of the connecting cylinder 10, and a threading hole 18 penetrating through the center of the connecting cylinder 10 is arranged in the middle of the inner core plate 17. The threading hole 18 corresponds to the internal central through holes of the top sleeve 9 and the bottom sleeve 11 up and down.

[0051] In a specific application scenario, due to the threaded connection between the connecting cylinder 10 and the top sleeve 9 and the bottom sleeve 11, it is convenient to disassemble the connecting cylinder 10 between the top sleeve 9 and the bottom sleeve 11. And the connecting cylinder 10 can slide inside the guide rail 16 through the slider 15, so as to facilitate the installation and disassembly of the connecting cylinder 10. At the same time, a threading hole 18 is arranged inside the connecting cylinder 10 for convenient threading.

[0052] Wherein: An empty groove 19 is formed by enclosing between the threading hole 18 and the connecting cylinder 10. A support frame 20 is arranged inside the empty groove 19. A clamping plate 21 is fixed on the inner side surface of the support frame 20. The clamping plate 21 is telescopically connected to the inner side of the inner core plate 17. The side shape structure of the support frame 20 is an inverted right triangle structure. The inner side surface of the support frame 20 is elastically connected to the inner core plate 17 through a spring 22. An extrusion plate 23 is attached to the outside of the support frame 20. The inner side surface of the extrusion plate 23 is inclined. A magnetic plate 24 is embedded in the inner side surface of the extrusion plate 23. And the extrusion plate 23 is magnetically adsorbed to the support frame 20 through the magnetic plate 24. The extrusion plate 23 is a vertical sliding structure inside the empty groove 19. Connecting plates 25 are symmetrically and fixedly installed on the side of the extrusion plate 23. An adjusting rod 26 is threadedly connected to the inside of the connecting plate 25. The top of the adjusting rod 26 is fixedly installed with an internal gear 27. The outside of the internal gear 27 is meshed with a gear ring 28. The outside of the gear ring 28 is meshed with an external gear 29. And the bottom of the external gear 29 is connected to a driving motor 30 fixed on the top of the connecting cylinder 10.

[0053] In a specific application scenario, the outer gear 29 is driven to rotate by the driving motor 30, which facilitates the outer gear 29 to drive the toothed ring 28 to rotate on the top of the connecting cylinder 10, thereby driving the inner gear 27 to rotate in the same direction, and further causing the adjusting rod 26 to rotate. The adjusting rod 26 drives the pressing plate 23 to lift inside the empty slot 19 through the threaded connection with the connecting plate 25. When the pressing plate 23 rises, since its inner side fits with the support frame 20 and the pressing plate 23 is adsorbed and connected to the support frame 20 through the magnetic plate 24, it can squeeze the support frame 20, causing the support frame 20 and the clamping plate 21 to extend into the inner side of the core plate 17, so as to clamp and correct the silk thread during the silk thread rewinding, facilitating the passage of the silk thread when threading again. At the same time, when the pressing plate 23 descends, the support frame 20 automatically drives the clamping plate 21 to pop out inside the core plate 17 through the elastic action of the spring 22 to avoid colliding with the silk thread and affecting the release of the silk thread.

[0054] Among them: An installation frame 31 is arranged at the upper left corner of the fixed back plate 1 outside the first pulley 2. The outer bottom of the installation frame 31 is rotatably installed with a pressing block 32. The top end of the pressing block 32 is fixed with a rubber pad 33. The end of the rubber pad 33 is correspondingly engaged with the groove of the first pulley 2. The outer top of the installation frame 31 is rotatably installed with a second telescopic rod 34. The top end of the second telescopic rod 34 is rotatably connected to the top of the pressing block 32.

[0055] In a specific application scenario, by the elongation of the second telescopic rod 34, the pressing block 32 can be rotated outside the installation frame 31, so that the arc-shaped structure at the top section of the pressing block 32 contacts the first pulley 2 through the rubber pad 33. When the telescopic amount of the second telescopic rod 34 increases, the distance between the rubber pad 33 and the first pulley 2 becomes smaller, thus facilitating the pressing of the silk thread during the silk thread rewinding to avoid the silk thread from loosening during rewinding and being beneficial for re-threading and use.

[0056] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention; the content not described in detail in this specification belongs to the prior art well-known to those of ordinary skill in the art. In addition, the directional terms such as up, down, left, right, front, and back in the text only represent their relative positions rather than absolute positions.

[0057] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0058] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A wire feeding and rewinding detection mechanism for a wire threading wire cutting machine tool, comprising: A fixed backplate (1) for connecting and fixing to a wire cutting machine tool and a first pulley (2) for incoming wire; It is characterized in that it further includes: A fourth pulley (5), the fourth pulley (5) is fixedly installed on the right surface of the top of the fixed backplate (1), and a third pulley (4) is arranged on the left side of the fourth pulley (5). The central axes of the fourth pulley (5) and the third pulley (4) are arranged on the same horizontal plane, and the side of the third pulley (4) is fitted and inserted into the side of the fourth pulley (5); A top sleeve (9), the top sleeve (9) is arranged below the left side of the fourth pulley (5), and the top sleeve (9) is slidably connected up and down on the outside of the fixed backplate (1); A bottom sleeve (11), the bottom sleeve (11) is located directly below the top sleeve (9), and a contact funnel (13) is arranged on the top of the bottom sleeve (11). A sensor (14) is arranged between the bottom sleeve (11) and the contact funnel (13), and a conduit (12) is connected to the bottom of the bottom sleeve (11); It further includes a connecting cylinder (10), the connecting cylinder (10) is detachably arranged between the top sleeve (9) and the bottom sleeve (11). A core plate (17) is integrally and fixedly arranged in the middle of the connecting cylinder (10), and a threading hole (18) penetrating through the center of the connecting cylinder (10) is arranged in the middle of the core plate (17). The threading hole (18) corresponds to the internal central through holes of the top sleeve (9) and the bottom sleeve (11) up and down; An empty groove (19) is formed by enclosing between the threading hole (18) and the connecting cylinder (10). A support frame (20) is arranged on the inner side of the empty groove (19), and a clamping plate (21) is fixed on the inner side surface of the support frame (20). The clamping plate (21) is telescopically connected to the inner side of the core plate (17); 2. The wire feeding and rewinding detection mechanism of a wire threading wire cutting machine tool according to claim 1, characterized in that: A second pulley (3) is arranged at the lower left corner of the fixed backplate (1). The second pulley (3), the first pulley (2), the third pulley (4) and the fourth pulley (5) are used for limiting the incoming wire. The pulley grooves of the second pulley (3), the first pulley (2), the third pulley (4) and the fourth pulley (5) are located in the same vertical plane; 3. The wire feeding and rewinding detection mechanism of a wire threading wire cutting machine tool according to claim 1, characterized in that: A connecting rod (7) is rotatably installed on the front side of the middle of the fixed backplate (1). A fixed frame (6) is fixed at the top end of the connecting rod (7). The third pulley (4) is rotatably installed on the inner side of the fixed frame (6). The inner side of the end of the connecting rod (7) is rotatably connected to a first telescopic rod (8), and the end of the first telescopic rod (8) is rotatably connected to the surface of the fixed backplate (1); 4. A wire feeding and rewinding detection mechanism for a wire threading wire cutting machine tool according to claim 1, characterized in that: The internal structure of the top sleeve (9) is in a funnel shape. Sliders (15) are symmetrically and fixedly installed on the rear side of the top sleeve (9), and the top sleeve (9) is slidably connected to the guide rail (16) fixed on the surface of the fixed backplate (1) through the sliders (15); 5. The wire feeding and rewinding detection mechanism of a wire threading wire cutting machine tool according to claim 1, wherein: The connection methods between the upper and lower ends of the connecting cylinder (10) and the top sleeve (9) and the bottom sleeve (11) are both threaded connections, and the screwing directions of the threaded structures at the upper and lower ends of the connecting cylinder (10) are opposite; 6. The wire feeding and rewinding detection mechanism of a wire threading wire cutting machine tool according to claim 1, characterized in that: The side shape structure of the support frame (20) is an inverted right triangle structure, and the inner side of the support frame (20) is elastically connected to the core plate (17) through a spring (22).

7. A wire feeding and rewinding detection mechanism for a wire threading wire cutting machine tool according to claim 6, characterized in that: An extrusion plate (23) is attached to the outer side of the support frame (20). The inner side of the extrusion plate (23) is inclined. A magnetic plate (24) is embedded in the inner side of the extrusion plate (23), and the extrusion plate (23) is magnetically adsorbed to the support frame (20) through the magnetic plate (24). The extrusion plate (23) is a vertical sliding structure inside the empty groove (19).

8. The wire feeding and rewinding detection mechanism of a wire threading wire cutting machine tool according to claim 7, characterized in that: Connecting plates (25) are symmetrically and fixedly installed on the sides of the extrusion plate (23). An adjusting rod (26) is threadedly connected to the inside of the connecting plate (25). The top of the adjusting rod (26) is fixedly installed with an internal gear (27). The outside of the internal gear (27) is meshed with a toothed ring (28). The outside of the toothed ring (28) is meshed with an external gear (29), and the bottom of the external gear (29) is connected to a driving motor (30) fixed to the top of the connecting cylinder (10).

9. The wire feeding and rewinding detection mechanism of a wire threading wire cutting machine tool according to claim 1, characterized in that: An installation frame (31) located outside the first pulley (2) is provided at the upper left corner of the fixed back plate (1). A pressing block (32) is rotatably installed at the outer bottom of the installation frame (31). A rubber pad (33) is fixed to the top of the pressing block (32). The end of the rubber pad (33) is correspondingly engaged with the wheel groove of the first pulley (2). A second telescopic rod (34) is rotatably installed at the outer top of the installation frame (31), and the top of the second telescopic rod (34) is rotatably connected to the top of the pressing block (32).

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