Wire unwinding and rewinding detection mechanism of wire threading linear cutting machine tool

Abstract

The invention relates to the technical field of wire cutting machine tools, and particularly discloses a wire unwinding and rewinding detection mechanism of a wire threading wire cutting machine tool, which comprises a fixed back plate used for being fixedly connected with the wire cutting machine tool and a first pulley used for wire feeding, the device further comprises a fourth pulley, the fourth pulley is fixedly installed on the surface of the right side of the top of the fixed back plate, a third pulley is arranged on the left side of the fourth pulley, the fourth pulley and the center axis of the third pulley are arranged on the same horizontal plane, and the side of the third pulley is arranged on the side of the fourth pulley in an attached and inserted mode. And the top sleeve is arranged below the left side of the fourth pulley, and the top sleeve is connected to the outer side of the fixed back plate in an up-down sliding mode. According to the wire unwinding and rewinding detection mechanism of the wire threading linear cutting machine tool, limiting use of a wire can be automatically adjusted, the wire can be conveniently limited, the bent and inclined wire can be corrected, and the wire threading success rate can be increased.

Description

Technical Field

[0001] The invention relates to the technical field of wire cutting machine tools, and more particularly to the technical field of automatic wire threading detection of wire cutting machine tools, and in particular to a wire unwinding detection mechanism for a wire threading wire cutting machine tool. Background Art

[0002] Wire cutting machine is a kind of high-precision processing equipment, which is widely used in the field of metal cutting and processing. Wire threading is one of the key steps in the preparation of wire cutting machine. The correct wire threading process directly affects the subsequent cutting accuracy and effect. With the continuous development of industrial technology, the use of automatic wire threading can improve the industrial processing efficiency. In the process of automatic wire threading, it is necessary to detect the correctness of wire threading, so as to rewind and rethread the wire when the wire threading is tilted. For example, a Chinese patent with application number 201911203847.9 discloses a wire-cutting and wire-rewinding detection mechanism for an automatic wire-threading wire-cutting machine, comprising a plate body, a surface of the plate body being rotatably connected to a first pulley through a rotating shaft, a surface of the plate body and being rotatably connected to a second pulley located on the left side of the first pulley, a bottom of the second pulley being rotatably connected to a first connecting plate, and a bottom of the first connecting plate being fixedly connected to a first spring; by arranging that the centers of the first pulley and the second pulley are on the same horizontal line, it can be ensured that the electrode wire is sent out from the middle of the first pulley and the second pulley in a vertically downward direction, so that the molybdenum wire can smoothly enter the limiting mechanism, and the through hole inside the limiting mechanism can keep the wire in a vertical state, thereby increasing the success rate of automatic wire threading, thereby effectively solving the problem that the molybdenum wire of the wire threading device in the prior art is mostly inclined when it comes out from the cutting point and cannot be vertically downward, which easily causes the molybdenum wire to bend during the wire release process, thereby reducing the success rate of automatic wire threading; However, in the actual automatic wire threading process, the current rewinding detection mechanism still has certain drawbacks, such as: The pulley is adjusted by an elastic element to limit the position of the wire, but its elastic effect always exerts force on the wire whether in the wire threading process or the rewinding process, which affects the rapid passage of the wire and is not conducive to improving the efficiency of automatic wire threading; Directly conduct bending test, and the wire cut through the pulley directly enters the catheter for use, which affects the success rate of wire threading; After the wire is bent during threading, the automatic rewinding only rewinds the wire and rethreads it, but cannot automatically correct the wire so that the wire can be threaded quickly.

[0003] Therefore, we propose a wire-threading wire cutting machine tool wire unwinding detection mechanism to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to provide a wire-releasing and rewinding detection mechanism for a wire cutting machine to solve the problem of the current wire-releasing and rewinding detection mechanism proposed in the above background technology, in which the wire is always under force, affecting the rewinding and wire threading efficiency, and there is no limiting mechanism, so the wire cannot be corrected, which is not conducive to improving the success rate of wire threading.

[0005] To achieve the above object, the present invention provides the following technical solution: a wire threading wire cutting machine tool wire unwinding detection mechanism, comprising: a fixed back plate for connecting and fixing with the wire cutting machine tool and a first pulley for feeding the wire, Also includes: A fourth pulley, the fourth pulley is fixedly mounted on the top right surface of the fixed back plate, and the third pulley is arranged on the left side of the fourth pulley, the fourth pulley is arranged on the same horizontal plane as the central axis of the third pulley, and the side of the third pulley is inserted and arranged on 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 connected to the outer side of the fixed back plate in an up-and-down sliding manner; 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.

[0006] Preferably, a second pulley is provided at the lower left corner of the fixed back plate, and the second pulley, the first pulley, the third pulley and the fourth pulley are used for limiting the entry of the wire, and the wheel grooves of the second pulley, the first pulley, the third pulley and the fourth pulley are located in the same vertical plane.

[0007] Preferably, a connecting rod is rotatably installed on the front middle side of the fixed back plate, a fixing frame is fixed to the top end of the connecting rod, the third pulley is rotatably installed on the inner side of the fixing frame, the inner side of the 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.

[0008] Preferably, the internal structure of the top sleeve is a funnel-shaped structure, a slider is symmetrically fixedly installed on the rear side of the top sleeve, and the top sleeve is correspondingly slidably connected to a guide rail fixed on the surface of the fixed back plate through the slider.

[0009] Preferably, it also includes a connecting tube, which is detachably arranged between the top sleeve and the bottom sleeve, and the upper and lower ends of the connecting tube are connected to the top sleeve and the bottom sleeve by threaded connection, and the thread structures at the upper and lower ends of the connecting tube have opposite screwing directions.

[0010] Preferably, a core plate is integrally fixedly provided in the middle of the connecting tube, and a threading hole penetrating the center of the connecting tube is provided in the middle of the core plate, and the threading hole corresponds to the internal center through hole of the top sleeve and the bottom sleeve in upper and lower directions.

[0011] Preferably, the threading hole and the connecting tube enclose a hollow groove, a support frame is provided on the inner side of the hollow groove, a clamping plate is fixed 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, and the inner side surface of the support frame is elastically connected to the core plate through a spring.

[0012] Preferably, an extrusion plate is fitted on the outer side of the support frame, the inner side of the extrusion plate is inclined, a magnetic plate is embedded in the inner side of the extrusion plate, and the extrusion plate is magnetically adsorbed between the magnetic plate and the support frame, and the extrusion plate is an up and down sliding structure on the inner side of the empty slot.

[0013] Preferably, a connecting plate is symmetrically fixedly installed on the side of the extrusion plate, an adjusting rod is threadedly connected to the inner side of the connecting plate, an internal gear is fixedly installed on the top of the adjusting rod, the outer side of the internal gear is meshingly connected to a gear ring, the outer side of the gear ring is meshingly connected to an external gear, and the bottom of the external gear is connected to a driving motor fixed to the top of the connecting cylinder.

[0014] Preferably, a mounting bracket located outside the first pulley is provided at the upper left corner of the fixed back plate, a pressure block is rotatably installed on the outer bottom of the mounting bracket, a rubber pad is fixed to the top of the pressure block, the end of the rubber pad is correspondingly engaged with the wheel groove of the first pulley, and a second telescopic rod is rotatably installed on the outer top of the mounting bracket, and the top of the second telescopic rod is rotatably connected to the top of the pressure block.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: the wire-threading wire cutting machine tool wire unwinding and rewinding detection mechanism can automatically adjust the limit use of the wire, which is convenient for limiting the wire, and can correct the bent and tilted wire, which is conducive to improving the success rate of wire threading; 1. In this solution, a third pulley, a fixed frame, a connecting rod and a first telescopic rod are provided. By extending and retracting the first telescopic rod, the connecting rod can be driven to rotate outside the fixed back plate, thereby driving the fixed frame and the third pulley to rotate, and the distance between the third pulley and the fourth pulley can be adjusted, so that different threads can be used, which is convenient for limiting the thread; 2. In this scheme, a top sleeve and a bottom sleeve are provided. The top sleeve is provided below the third pulley and the fourth pulley. The silk thread is lowered through the funnel structure inside the top sleeve, and the silk thread can be limited by the top sleeve for easy threading. The silk thread passing through the top sleeve can enter the bottom sleeve, and the silk thread is lowered by connecting the conduit through the bottom sleeve; Furthermore, a contact funnel and a sensor are provided on the inner top of the bottom sleeve, and the top of the contact funnel is sensed by the sensor. The sensor may be a vibration, pressure or other sensor. When the vibration or pressure change of the contact funnel is sensed, the inclination of the wire is determined, thereby controlling the rewinding. 3. This solution is provided with a connecting tube, a core plate and a threading hole. The connecting tube is fixedly connected between the top sleeve and the bottom sleeve by a threaded connection, and the thin wire can be unwound by limiting the position through the threading hole provided through the inside of the connecting tube; Furthermore, the support frame forms an elastic structure on the outer side of the core plate through the spring, and the support frame is inserted into the inner side of the core plate through the clamping plate, and the wire is squeezed through the clamping plate, so that the wire can be corrected when the wire needs to be rewound, so as to facilitate threading and use again; 4. This solution is provided with an extrusion plate, a magnetic plate and an adjusting rod. The extrusion plate is adsorbed between the magnetic plate and the support frame. When the extrusion plate slides down, the support frame can be pulled outward, and the magnetic adsorption can avoid jamming. At the same time, the external gear drives the gear ring to drive the adjusting rod at the same time, which is convenient for adjustment and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the overall front left side structure of the present invention; Figure 2 It is a schematic diagram of the overall front right structure of the present invention; Figure 3 It is a schematic diagram of the overall front cutaway structure of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of the top sleeve, the connecting sleeve and the bottom sleeve of the present invention; Figure 5 It is a schematic diagram of the overall cross-section structure of the connecting tube of the present invention; Figure 6 It is a schematic diagram of the overall structure of the support frame and the extruded plate of the present invention; Figure 7 It is a schematic diagram of the overall top view and partial cutaway structure of the present invention; Figure 8 It is a schematic structural diagram of the disassembled state of the connecting tube of the present invention.

[0017] 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 tube; 11. bottom sleeve; 12. guide tube; 13. contact funnel; 14. sensor; 15. slider; 16. guide rail; 17. core plate; 18. 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. driving motor; 31. mounting frame; 32. pressure block; 33. rubber pad; 34. second telescopic rod. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0019] See also Figure 1-8 , the present invention provides the following technical solutions: A wire-threading wire cutting machine tool wire unwinding 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 tube 10, a bottom sleeve 11, a guide tube 12, a contact funnel 13, a sensor 14, a slider 15, a guide rail 16, a core plate 17, a 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 inner gear 27, a gear ring 28, an outer gear 29, a driving motor 30, a mounting frame 31, a pressing block 32, a rubber pad 33 and a second telescopic rod 34; Wherein: the first pulley 2 is rotatably installed on the left middle part of the fixed back plate 1, the fourth pulley 5 is fixedly installed on the top right surface of the fixed back plate 1, and the third pulley 4 is arranged on the left side of the fourth pulley 5, the fourth pulley 5 is arranged on the same horizontal plane as the central axis of the third pulley 4, the side of the third pulley 4 is fitted and inserted on the side of the fourth pulley 5, and the second pulley 3 is arranged at the lower left corner of the fixed back plate 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, and the wheel grooves of the second pulley 3, the first pulley 2, the third pulley 4 and the fourth pulley 5 are located on the same vertical plane.

[0020] In a specific application scenario, the silk thread passes through the second pulley 3 and the first pulley 2 once through the winding mechanism and enters between the third pulley 4 and the fourth pulley 5. The silk thread is moved downward through the limiting of the third pulley 4 and the fourth pulley 5 for automatic threading and use.

[0021] Among them: a connecting rod 7 is rotatably installed on the front middle side of the fixed backboard 1, a fixing frame 6 is fixed to the top end of the connecting rod 7, the third pulley 4 is rotatably installed on the inner side of the fixing frame 6, and the inner side of the end of the connecting rod 7 is rotatably connected to the first telescopic rod 8, and the end of the first telescopic rod 8 is rotatably connected to the surface of the fixed backboard 1.

[0022] In a specific application scenario, by extending and retracting the first telescopic rod 8, the angle of the connecting rod 7 can be adjusted by utilizing the sequential rotation connection between the fixed back plate 1, the first telescopic rod 8, the connecting rod 7 and the fixed back plate 1, thereby rotating the fixed frame 6 at an angle, adjusting the position of the fixed frame 6 and the third pulley 4 to adjust the spacing size between the third pulley 4 and the fourth pulley 5, and the third pulley 4 is fittedly arranged on the inner side of the wheel groove of the fourth pulley 5, which can stably limit the silk thread for easy unwinding and threading of the silk thread, and can clamp the silk thread when rewinding to prevent the silk thread roll from loosening after rewinding.

[0023] Among them: the top sleeve 9 is arranged at the lower left side of the fourth pulley 5, and the top sleeve 9 is connected to the outer side of the fixed back plate 1 in an up and down sliding manner, the internal structure of the top sleeve 9 is a funnel-shaped structure, and a slider 15 is symmetrically fixedly installed on the rear side of the top sleeve 9, and the top sleeve 9 is correspondingly slidably connected with a guide rail 16 fixed on the surface of the fixed back plate 1 through the slider 15, 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.

[0024] In a specific application scenario, the internal funnel-shaped structure of the top sleeve 9 is first used to limit the position of the wire below. When the wire has a certain bend, it can slide down to the central through hole through the funnel limiter, limiting and straightening the wire to a certain extent. After the wire is lowered to the inside of the bottom sleeve 11, it is threaded through the through hole inside the bottom sleeve 11, so that the wire can be continued downward through the conduit 12 to ensure the completion of automatic threading. When the wire is bent, the wire will contact the contact funnel 13. A sensor 14 is provided 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 the continuous variable on the surface of the contact funnel 13, the unwinding mechanism automatically rewinds the wire to facilitate threading again.

[0025] Among them: the connecting tube 10 is detachably arranged between the top sleeve 9 and the bottom sleeve 11, the upper and lower ends of the connecting tube 10 are connected to the top sleeve 9 and the bottom sleeve 11 by threaded connection, and the threaded structures at the upper and lower ends of the connecting tube 10 are screwed in opposite directions, the middle part of the connecting tube 10 is integrally fixed with a core plate 17, and the middle part of the core plate 17 is provided with a threading hole 18 that passes through the center of the connecting tube 10, and the threading hole 18 corresponds to the internal center through hole of the top sleeve 9 and the bottom sleeve 11 up and down.

[0026] In a specific application scenario, the threaded connection between the connecting tube 10 and the top sleeve 9 and the bottom sleeve 11 facilitates the disassembly of the connecting tube 10 between the top sleeve 9 and the bottom sleeve 11, and the connecting tube 10 can slide on the inner side of the guide rail 16 through the slider 15 to facilitate the installation and removal of the connecting tube 10. At the same time, a threading hole 18 is provided inside the connecting tube 10 to facilitate threading.

[0027] Among them: the threading hole 18 and the connecting tube 10 enclose a hollow groove 19, a support frame 20 is arranged on the inner side of the hollow groove 19, a clamping plate 21 is fixed on the inner side of the support frame 20, the clamping plate 21 is telescopically connected to the inner side of the core plate 17, the side shape structure of the support frame 20 is an inverted right triangle structure, the inner side of the support frame 20 is elastically connected to the core plate 17 through a spring 22, an extrusion plate 23 is fitted on the outer side of the support frame 20, the inner side of the extrusion plate 23 is inclined, and the inner side of the extrusion plate 23 is embedded with a The magnetic plate 24 and the extrusion plate 23 are magnetically adsorbed between the magnetic plate 24 and the support frame 20. The extrusion plate 23 is an up and down sliding structure on the inner side of the empty slot 19. The side of the extrusion plate 23 is symmetrically fixed with a connecting plate 25. The inner side of the connecting plate 25 is threadedly connected with an adjusting rod 26. The top of the adjusting rod 26 is fixedly installed with an internal gear 27. The outer side of the internal gear 27 is meshedly connected with a ring gear 28. The outer side of the ring gear 28 is meshedly connected 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 tube 10.

[0028] In a specific application scenario, the outer gear 29 is driven to rotate by the driving motor 30, so that the outer gear 29 drives the gear ring 28 to rotate on the top of the connecting tube 10, thereby driving the inner gear 27 to rotate in the same direction, and then the adjusting rod 26 rotates. The adjusting rod 26 is threadedly connected to the connecting plate 25 to drive the extrusion plate 23 to rise and fall on the inner side of the empty groove 19. When the extrusion plate 23 rises, due to the fit between its inner side and the support frame 20, and the extrusion plate 23 is adsorbed and connected to the support frame 20 through the magnetic plate 24, the support frame 20 can be squeezed, so that the support frame 20 and the clamping plate 21 extend into the inner side of the core plate 17, so as to clamp and correct the wire when the wire is rewound, so as to facilitate the wire to pass through when it is threaded again. At the same time, when the extrusion plate 23 descends, the support frame 20 automatically drives the clamping plate 21 to pop out on the inner side of the core plate 17 through the elastic action of the spring 22, so as to avoid collision with the wire and affect the lowering of the wire.

[0029] Wherein: a mounting frame 31 located on the outer side of the first pulley 2 is provided at the upper left corner of the fixed back plate 1, a pressure block 32 is rotatably installed on the outer bottom of the mounting frame 31, a rubber pad 33 is fixed on the top of the pressure block 32, and the end of the rubber pad 33 is correspondingly engaged with the wheel groove of the first pulley 2, and a second telescopic rod 34 is rotatably installed on the outer top of the mounting frame 31, and the top of the second telescopic rod 34 is rotatably connected to the top of the pressure block 32.

[0030] In a specific application scenario, the pressure block 32 can be rotated on the outside of the mounting frame 31 by extending the second telescopic rod 34, so that the top arc structure of the pressure block 32 contacts the first pulley 2 through the rubber pad 33. When the extension amount of the second telescopic rod 34 increases, the distance between the rubber pad 33 and the first pulley 2 becomes smaller, thereby facilitating pressing down the silk thread when the silk thread is rewound, so as to avoid loosening of the silk thread roll during rewinding, which is conducive to threading the silk thread again.

[0031] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention; the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in the field. In addition, the directional nouns such as up, down, left, right, front and back in the text only represent their relative positions rather than absolute positions.

[0032] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, 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 described in detail here.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wire feeding wire cutting machine tool wire unwinding and rewinding detection mechanism, comprising: A fixed back plate (1) for connecting and fixing to the wire cutting machine tool and a first pulley (2) for feeding the wire; It is characterized by further comprising: a fourth pulley (5), the fourth pulley (5) being fixedly mounted on the top right surface of the fixed back plate (1), and a third pulley (4) being arranged on the left side of the fourth pulley (5), the fourth pulley (5) being arranged on the same horizontal plane as the central axis of the third pulley (4), and the side of the third pulley (4) being arranged to fit and insert on the side of the fourth pulley (5); A top sleeve (9), the top sleeve (9) being arranged below the left side of the fourth pulley (5), and the top sleeve (9) being connected to the outer side of the fixed back plate (1) in an up-and-down sliding manner; A bottom sleeve (11), the bottom sleeve (11) is located directly below the top sleeve (9), a contact funnel (13) is provided on the top of the bottom sleeve (11), a sensor (14) is provided between the bottom sleeve (11) and the contact funnel (13), and a conduit (12) is connected to the bottom of the bottom sleeve (11).

2. The wire feeding wire cutting machine tool wire unwinding and rewinding detection mechanism according to claim 1 is characterized in that: A second pulley (3) is arranged at the lower left corner of the fixed back plate (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 wire; the wheel grooves of the second pulley (3), the first pulley (2), the third pulley (4) and the fourth pulley (5) are located on the same vertical plane.

3. The wire feeding wire cutting machine tool wire unwinding and rewinding detection mechanism according to claim 1, characterized in that: A connecting rod (7) is rotatably mounted on the front middle part of the fixed back plate (1); a fixing frame (6) is fixed to the top end of the connecting rod (7); the third pulley (4) is rotatably mounted on the inner side of the fixing frame (6); a first telescopic rod (8) is rotatably connected to the inner side of the end of the connecting rod (7); and the end of the first telescopic rod (8) is rotatably connected to the surface of the fixed back plate (1).

4. The wire feeding wire cutting machine tool wire unwinding and rewinding detection mechanism according to claim 1, characterized in that: The internal structure of the top sleeve (9) is a funnel-shaped structure, a slider (15) is symmetrically fixedly mounted on the rear side of the top sleeve (9), and the top sleeve (9) is correspondingly slidably connected to a guide rail (16) fixed to the surface of the fixed back plate (1) via the slider (15).

5. The wire unwinding and rewinding detection mechanism of a wire cutting machine according to claim 1, characterized in that: It also comprises a connecting tube (10), the connecting tube (10) being detachably arranged between the top sleeve (9) and the bottom sleeve (11), the upper and lower ends of the connecting tube (10) being connected to the top sleeve (9) and the bottom sleeve (11) by threaded connection, and the threaded structures at the upper and lower ends of the connecting tube (10) being screwed in opposite directions.

6. The wire feeding wire cutting machine tool wire unwinding and rewinding detection mechanism according to claim 5, characterized in that: A core plate (17) is integrally fixedly provided in the middle of the connecting tube (10), and a threading hole (18) penetrating the center of the connecting tube (10) is provided in the middle of the core plate (17), and the threading hole (18) corresponds vertically to the internal center through holes of the top sleeve (9) and the bottom sleeve (11).

7. The wire unwinding and rewinding detection mechanism of a wire cutting machine according to claim 6, characterized in that: The threading hole (18) and the connecting tube (10) enclose a hollow groove (19), a support frame (20) is arranged on the inner side of the hollow groove (19), a clamping plate (21) is fixed to the inner side of the support frame (20), the clamping plate (21) is telescopically connected to the inner side of the core plate (17), the side surface of the support frame (20) is in the shape of an inverted right triangle structure, and the inner side surface of the support frame (20) is elastically connected to the core plate (17) via a spring (22).

8. The wire unwinding and rewinding detection mechanism of a wire cutting machine according to claim 7, characterized in that: An extrusion plate (23) is fitted on the outer side of the support frame (20), the inner side of the extrusion plate (23) is inclined, a magnetic plate (24) is embedded and installed on the inner side of the extrusion plate (23), and the extrusion plate (23) is magnetically adsorbed between the magnetic plate (24) and the support frame (20), and the extrusion plate (23) is an up and down sliding structure on the inner side of the empty slot (19).

9. The wire feeding wire cutting machine tool wire unwinding and rewinding detection mechanism according to claim 8, characterized in that: A connecting plate (25) is symmetrically fixedly mounted on the side of the extrusion plate (23); an adjusting rod (26) is threadedly connected to the inner side of the connecting plate (25); an internal gear (27) is fixedly mounted on the top of the adjusting rod (26); a gear ring (28) is meshedly connected to the outer side of the internal gear (27); an external gear (29) is meshedly connected to the outer side of the gear ring (28); and a driving motor (30) fixed to the top of the connecting tube (10) is connected to the bottom of the external gear (29).

10. The wire unwinding and rewinding detection mechanism of a wire cutting machine according to claim 1, characterized in that: A mounting frame (31) located outside the first pulley (2) is provided at the upper left corner of the fixed back plate (1); a pressure block (32) is rotatably mounted on the outer bottom of the mounting frame (31); a rubber pad (33) is fixed to the top of the pressure block (32); an end of the rubber pad (33) is correspondingly engaged with a wheel groove of the first pulley (2); a second telescopic rod (34) is rotatably mounted on the outer top of the mounting frame (31); and the top of the second telescopic rod (34) is rotatably connected to the top of the pressure block (32).

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