Automatic wire threading device for medium-large aperture linear cutting

Abstract

The invention discloses an automatic wire threading device for medium and large aperture wire cutting, which comprises a wire guiding conduit, a wire guider and a power component, the wire guiding conduit comprises an upper beam wire guiding conduit and a lower beam wire guiding conduit, and the upper beam wire guiding conduit and the lower beam wire guiding conduit are respectively arranged in the length directions of an upper beam and a lower beam of a wire cutting device in an extending manner; the pipe orifices close to one end of the wire guide wheel are oppositely arranged up and down, and a wire guide full path is constructed through combination; a wire guiding full path is constructed through a wire guiding guide pipe, a wire guiding device serves as a conveying body, and a power component drives the wire guiding device to sequentially wind an upper beam and a lower beam of the wire cutting device from the upper end of a wire storage barrel of the wire cutting device to the lower end of the wire storage barrel along the wire guiding full path; and under the driving of the power part, the molybdenum wire is reversely pulled by the wire guiding device along a wire guiding full path and is reset to the upper end of the wire storage cylinder. Full-path guiding is carried out on the molybdenum wire through the wire guiding device, full-path guiding automatic wire threading is achieved, the problem that in the prior art, the molybdenum wire is prone to deviating from the wire threading path is solved, and the device is simple in structure, convenient to install and low in manufacturing and transformation cost.

Description

Technical Field

[0001] The present invention relates to the technical field of wire cutting machines, and particularly relates to an automatic wire threading device for medium and large aperture wire cutting. Background Art

[0002] The basic principle of a wire cutting machine is to use a thin metal wire as an electrode to cut and form a workpiece through pulsed spark discharge. Specifically, during wire cutting, the molybdenum wire does not directly contact the workpiece body; after the molybdenum wire is energized, it is not the metal wire itself that generates high temperature for cutting, but an instantaneous discharge occurs between the wire and the workpiece, generating high temperature to locally melt or vaporize the workpiece, thereby achieving cutting. However, since wire cutting machines all require professional personnel to manually thread the wire, the process is complex. Moreover, during the wire cutting process, if other cuts need to be made on the same workpiece, the staff needs to be on duty. After cutting at one position, the wire needs to be manually threaded again to complete the next round of cutting, resulting in low production efficiency and high processing costs.

[0003] The invention patent with the patent publication number CN114393262A discloses an intelligent automatic wire threading numerical control wire cutting machine. It clamps the lead wire through a wire clamping moving chuck, drives the wire clamping moving chuck to move towards the limit frame of the lower beam by a lifting device, so that the lead wire moves to the wire connector of the lower beam, then makes the wire connector in the wire receiving state, and finally winds the wire connector on the wire coiling cylinder through a driving device and a connecting part.

[0004] The utility model patent with the patent publication number CN220698462U discloses a wire threading conduit limiting mechanism. The sliding seat arranged on the upper beam slides along the slide rail to the lowermost end, driving the wire threading conduit to move downward together. After passing through the limiting hole, it is docked with the wire inlet on the docking seat to form a smooth wire threading channel. The filament electrode enters from the upper end of the wire threading conduit under the clamping of the wire feeding mechanism, passes through the wire threading conduit and exits from the lower end, and then enters the wire threading mechanism of the lower beam from the wire inlet.

[0005] The invention patent with the patent publication number CN113996876B discloses a wire cutting machine automatic wire threading device and an automatic wire threading and automatic wire collecting method. The molybdenum wire is sent to the lower beam through a wire feeding wheel and a wire guiding tube arranged on the upper beam of the wire cutting device, and the molybdenum wire is clamped by a wire clamping component arranged on the lower beam and driven along the sliding guide rail arranged on the lower beam to move the clamping jaw towards the wire storage cylinder, thereby realizing molybdenum wire guiding. The patent publication number CN106964858B also discloses a similar scheme for guiding the molybdenum wire by a guide rail.

[0006] The invention patent with the publication number CN119304289A discloses an automatic wire threading device and a middle-wire EDM machine tool. An active wire feeding wheel, a wire guiding wheel and a wire guiding tube are arranged on the lower beam of the wire cutting device. The end of the molybdenum wire moved to the lower eye mold is transmitted into the wire guiding tube through the active wire feeding wheel and the wire guiding wheel, and under the power of the active wire feeding wheel, the molybdenum wire moves along the wire guiding tube to the wire storage cylinder for fixation.

[0007] The invention patent with the publication number CN116786926A discloses a wire cutting automatic wire threading and wire removing method and device. A wire threading tube passes through the workpiece from above the workpiece to guide the molybdenum wire fed upward by the wire feeding device below the workpiece through the workpiece. The molybdenum wire is clamped by a wire clamping device and the molybdenum wire is pulled back to a proper position by a wire winding cylinder, and then a flexible shaft wire pulling hook is used to pull the end of the molybdenum wire to the wire winding cylinder.

[0008] The above-mentioned existing wire cutting device automatic wire threading devices either use a wire feeding wheel for wire feeding, or use a guide rail slider to guide wire feeding, or use a combination of a wire feeding wheel and a catheter for wire feeding, and use a wire hook device to pull the molybdenum wire along the direction of the catheter to realize automatic wire threading of wire cutting; however, both the upper beam wire threading path and the lower beam wire threading path in the above-mentioned wire cutting device automatic wire threading devices are separate half-path wire guiding paths, and the wire threading path between the upper and lower beams is disconnected, and a full-path wire guiding of the wire cutting device is not established, and the molybdenum wire cannot be guided along the full path, and there is still a problem that the molybdenum wire is prone to deviating from the wire threading path.

[0009] At the same time, the existing wire cutting automatic wire threading devices all use molybdenum wire as the transmission main body, but the molybdenum wire is thin and has poor rigidity. When using it as the transmission main body, it is necessary to accurately control its transmission direction to avoid it deviating from the transmission path. Since the wire threading path between the upper and lower beams in the existing wire cutting automatic wire threading devices is disconnected, therefore, in order to ensure that the molybdenum wire can be accurately conducted to the upper beam or the lower beam, a high-precision wire guiding component needs to be established between the upper and lower beams. In this way, not only the cost is high, but also the difficulty of later installation, debugging and maintenance is great.

[0010] Therefore, there is an urgent need to provide a wire cutting automatic wire threading device with a simple structure, convenient installation and low cost to realize full-path guided automatic wire threading and solve the problem that the molybdenum wire is prone to deviating from the wire threading path in the prior art. Summary of the Invention

[0011] The purpose of the present invention is to overcome the above technical deficiencies and provide a wire cutting automatic wire threading device that can realize full-path guided automatic wire threading and has a simple structure and low cost.

[0012] To achieve the above technical purpose, the technical solution of the present invention provides a middle and large aperture wire cutting automatic wire threading device, which includes:

[0013] Wire guiding catheter, the wire guiding catheter includes an upper beam wire guiding catheter and a lower beam wire guiding catheter, the upper beam wire guiding catheter and the lower beam wire guiding catheter are respectively arranged along the length direction of the upper beam and the lower beam of the wire cutting device, and the pipe orifices at one end close to the wire guiding wheel are arranged opposite to each other up and down. The upper beam wire guiding catheter and the lower beam wire guiding catheter are combined to construct a complete wire guiding path;

[0014] Wire guiding device, the wire guiding device has a flexible body with a diameter adapted to the inner diameter of the wire guiding catheter and a length greater than the length of the complete wire guiding path. A wire hanging member is provided at one end of the body;

[0015] Power component, the power component is used to drive the wire guiding device to walk along the complete wire guiding path from the upper end of the wire storage cylinder of the wire cutting device to the lower end of the wire storage cylinder, and reversely pull the wire guiding device to reset to the upper end of the wire storage cylinder.

[0016] Preferably, the pipe body of the upper beam wire guiding catheter extends from a position close to the upper end of the wire storage cylinder to the free end of the upper beam. One end thereof is bent downward and obliquely toward the wire storage cylinder, and the other end is bent downward around the upper wire guiding wheel of the wire cutting device to a vertical angle; the pipe body of the lower beam wire guiding catheter extends from the free end of the lower beam to a position close to the lower end of the wire storage cylinder. One end thereof is oriented toward the wire storage cylinder, and the other end is bent upward around the lower wire guiding wheel of the wire cutting device to a vertical angle.

[0017] Preferably, the end of the upper beam wire guiding catheter is bent downward around the upper wire guiding wheel of the wire cutting device to a vertical angle and aligned with the upper eye mold of the wire cutting device; the end of the lower beam wire guiding catheter is bent upward around the lower wire guiding wheel of the wire cutting device to a vertical angle and aligned with the lower eye mold of the wire cutting device.

[0018] Preferably, the wire guiding catheter is offset relative to the molybdenum wire tensioning position, and wire passing slots are provided on the pipe body on one side of the wire guiding catheter facing the molybdenum wire tensioning position.

[0019] Preferably, the body of the wire guiding device is a spring steel wire sheath.

[0020] Preferably, at least two non-coaxial wire passing holes are provided on the wire hanging member.

[0021] Preferably, a first wire passing hole and a second wire passing hole are provided at the end of the wire guiding device. The first wire passing hole is arranged obliquely from the center of the end face of the wire guiding device to penetrate through the outer wall of the wire guiding device. The second wire passing hole penetrates obliquely from one outer wall of the wire guiding device to the other outer wall of the wire guiding device. The included angle between the second wire passing hole and the first wire passing hole is an acute angle.

[0022] Preferably, the power component is two tangent active wheels, and the active wheels are fixed on the cylinder seat of the wire storage cylinder through a mounting seat.

[0023] Preferably, the large and medium aperture wire cutting automatic wire threading device further includes a guiding member, which is arranged on the lower wire die of the wire cutting device and is used to guide the end of the wire guiding device that penetrates downward from the wire guiding catheter on the upper beam into the wire guiding catheter on the lower beam.

[0024] Preferably, a tension wheel assembly is provided on the entire wire guiding path.

[0025] Compared with the prior art, the beneficial effects of the present invention include:

[0026] For the large and medium aperture wire cutting automatic wire threading device of the present invention, it constructs the entire wire guiding path through the wire guiding catheter, uses the wire guiding device as the transmission main body, and drives the wire guiding device to sequentially wind around the upper beam and the lower beam of the wire cutting device from the upper end of the wire storage cylinder of the wire cutting device to the lower end of the wire storage cylinder along the entire wire guiding path by the power component; and under the drive of the power component, the molybdenum wire is reversely pulled by the wire guiding device along the entire wire guiding path and reset to the upper end of the wire storage cylinder. The molybdenum wire is guided along the entire path by the wire guiding device to realize automatic wire threading along the entire path, and solve the problem that the molybdenum wire is prone to deviation from the wire threading path in the prior art. The large and medium aperture wire cutting automatic wire threading device has a simple structure, is convenient to install, and has extremely low manufacturing and transformation costs, realizes the transformation of low-cost wire cutting automatic wire threading equipment, and greatly reduces the processing cost of wire cutting automatic wire threading.

[0027] For the large and medium aperture wire cutting automatic wire threading device of the present invention, at least two non-coaxial wire threading holes are opened on the wire hanging member, so that the molybdenum wire passes through the two wire threading holes in sequence; since the two wire threading holes are non-coaxial, the wire body of the molybdenum wire will be bent during the perforation process and will not automatically recover, and the end of the molybdenum wire is bent into a hook shape, which forms a self-locking with the wire threading hole, ensuring that the molybdenum wire can be conveniently and firmly arranged on the wire hanging member, and the end of the molybdenum wire can be fixed on the wire guiding device without a complex locking device.

[0028] For the large and medium aperture wire cutting automatic wire threading device of the present invention, it is designed that the wire guiding catheter is offset relative to the molybdenum wire tensioning position, and wire threading slots are opened on the tube body on one side of the wire guiding catheter facing the molybdenum wire tensioning position, so that the molybdenum wire passes through the wire threading slot and exits the wire guiding catheter in a tensioned state, forming an independent molybdenum wire tensioning loop, enabling the molybdenum wire to be completely separated from the inner wall of the tube body of the wire guiding catheter in the molybdenum wire tensioning loop, and avoiding the problem that the molybdenum wire is prone to breakage due to friction between the molybdenum wire and the inner wall of the tube body of the wire guiding catheter in a tensioned state. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional structural schematic diagram of the large and medium aperture wire cutting automatic wire threading device described in the embodiment of the present invention loaded on a wire cutting device.

[0030] Figure 2 is Figure 1 a sectional view of

[0031] Figure 3 It is a schematic diagram of the state of the entire wire guiding path when the wire guiding device described in the embodiment of the present invention walks along the wire guiding conduit.

[0032] Figure 4 It is a schematic diagram of the state of the molybdenum wire tensioning circuit described in the embodiment of the present invention.

[0033] Figure 5 It is a sectional view of the wire hanging member described in the embodiment of the present invention.

[0034] The marks of each component in the attached drawings are as follows:

[0035] 1. Wire storage cylinder; 2. Positioning base; 3. Cutting table; 4. Upper beam; 5. Lower beam; 41. Upper wire guiding wheel; 51. Lower wire guiding wheel; 42. Upper eye die; 52. Lower eye die; 6. Upper beam wire guiding conduit; 7. Lower beam wire guiding conduit; 8. Wire guiding device; 9. Power component; 81. Wire hanging member; 811. First wire threading hole; 812. Second wire threading hole; 10. Guide member; 11. Molybdenum wire. Detailed implementation manners

[0036] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] Existing wire cutting automatic wire threading devices use molybdenum wire 11 as the transmission main body. To ensure that the molybdenum wire 11 can be accurately conducted to the upper beam 4 or the lower beam 5, it is necessary to establish a high-precision wire guiding assembly between the upper and lower beams 4 and 5, resulting in high costs and great difficulties in later installation, debugging and maintenance. To solve the above problems, the present invention provides a wire cutting automatic wire threading device with medium and large apertures. By constructing the entire wire guiding path and using the wire guiding device 8 as the transmission main body, the molybdenum wire 11 is guided along the entire path by the wire guiding device 8, with a simple structure, convenient installation and low cost.

[0038] Such as Figure 1As shown in the figure, the wire cutting device includes a wire storage drum 1, a positioning base 2, a cutting table 3, an upper beam 4, and a lower beam 5. The wire storage drum 1 is arranged on one side of the positioning base 2, and the cutting table 3 is arranged on the other side of the positioning base 2. The upper beam 4 and the lower beam 5 are horizontally and parallelly arranged on the positioning base 2. One end of them is fixed to the positioning base 2, and the other free end horizontally extends above the cutting table 3. The free ends of the upper beam 4 and the lower beam 5 are respectively fixed with an upper wire guide wheel 41 and a lower wire guide wheel 51. Among them, the lower beam 5 is flush with the lower end of the wire storage drum 1. When performing wire cutting work, the molybdenum wire 11 wound on the wire storage drum 1 needs to sequentially pass around the upper wire guide wheel 41, the lower wire guide wheel 51 from the upper end of the wire storage drum 1 to the lower end of the wire storage drum 1 and be fixed on the wire storage drum 1, or sequentially pass around the lower wire guide wheel 51, the upper wire guide wheel 41 from the lower end of the wire storage drum 1 to the upper end of the wire storage drum 1 and be fixed on the wire storage drum 1. In this way, the wire threading work for wire cutting is completed.

[0039] As Figures 2 to 4 As shown in the figure, the automatic wire threading device for large and medium-sized aperture wire cutting provided by the present invention includes a wire guiding catheter, a wire guiding device 8, and a power component 9. Among them, the wire guiding catheter includes an upper beam wire guiding catheter 6 and a lower beam wire guiding catheter 7. The upper beam wire guiding catheter 6 and the lower beam wire guiding catheter 7 are respectively arranged along the length directions of the upper beam 4 and the lower beam 5 of the wire cutting device, and the pipe orifices at the ends close to the wire guide wheels are arranged opposite to each other up and down. The upper beam wire guiding catheter 6 and the lower beam wire guiding catheter 7 are combined to construct a complete wire guiding path. The wire guiding device 8 has a flexible body with a diameter adapted to the inner diameter of the wire guiding catheter and a length greater than the length of the complete wire guiding path. The power component 9 is arranged close to the wire storage drum 1 and is used to drive the wire guiding device 8 to walk from the upper end of the wire storage drum 1 of the wire cutting device along the complete wire guiding path to the lower end of the wire storage drum 1, and reversely pull the wire guiding device 8 to reset to the upper end of the wire storage drum 1. Driven by the power component 9, the wire guiding device 8 runs along the complete wire guiding path constructed by the combination of the upper beam wire guiding catheter 6 and the lower beam wire guiding catheter 7 to the lower end of the wire storage drum 1, and under the reverse power action of the power component 9, the molybdenum wire 11 wound on the wire storage drum 1 is reversely pulled along the complete wire guiding path to reset to the upper end of the wire storage drum 1, realizing automatic wire threading.

[0040] As Figure 2As shown in the figure, the tube body of the upper beam wire guiding tube 6 extends from a position near the upper end of the wire storage cylinder 1 to the free end of the upper beam. One end of it bends downward and obliquely towards the wire storage cylinder 1, and the other end bends downward around the upper wire guiding wheel 41 of the wire cutting device to a vertical angle; the tube body of the lower beam wire guiding tube 7 extends from the free end of the lower beam to a position near the lower end of the wire storage cylinder 1. One end of it faces the wire storage cylinder 1, and the other end bends upward around the lower wire guiding wheel 51 of the wire cutting device to a vertical angle. The vertical end pipe orifices of the upper beam wire guiding tube 6 and the lower beam wire guiding tube 7 are arranged opposite to each other vertically. When the wire guiding device 8 passes out along the upper beam wire guiding tube 6, it continues to pass out vertically downward along the direction of the free end pipe orifice of the upper beam wire guiding tube 6 until it enters the free end pipe orifice of the vertically arranged lower beam wire guiding tube 7. It enters the lower beam wire guiding tube 7 from the free end pipe orifice of the lower beam wire guiding tube 7 and passes out of the pipe orifice on the side of the lower beam wire guiding tube 7 close to the wire storage cylinder 1 under the guidance of the lower beam wire guiding tube 7, completing the walking of the entire wire guiding path.

[0041] The area vertically opposite between the free end of the upper beam and the free end of the lower beam of the wire cutting device is the perforation working area. The workpiece is fixed on the cutting table 3, and the position to be perforated is extended into the perforation working area; the path that the molybdenum wire 11 walks through the prefabricated wire threading hole on the workpiece from the free end of the upper beam to the free end of the lower beam is the perforation path. During the process of the wire guiding device 8 walking the entire wire guiding path, it also needs to pass through the perforation path; to ensure that the perforation path walked by the wire guiding device 8 is consistent with the perforation path of the molybdenum wire 11, in some preferred embodiments, the end of the upper beam wire guiding tube 6 bends downward around the upper wire guiding wheel 41 of the wire cutting device to a vertical angle and aligns with the upper eye mold 42 of the wire cutting device; the end of the lower beam wire guiding tube 7 bends upward around the lower wire guiding wheel 51 of the wire cutting device to a vertical angle and aligns with the lower eye mold 52 of the wire cutting device. The upper eye mold 42 and the lower eye mold 52 of the wire cutting device are both provided with eye mold through holes through which the wire guiding device 8 can pass. In this way, it is ensured that the perforation path walked by the wire guiding device 8 is consistent with the perforation path of the molybdenum wire 11, and further ensured that the wire guiding device 8 can smoothly pass through the prefabricated wire threading hole on the workpiece. According to the diameter of the wire guiding device 8, the large-aperture wire cutting automatic wire threading device in the present invention can operate the opening work with the same diameter as the wire guiding device 8; preferably, the large-aperture wire cutting automatic wire threading device in the present invention can operate the opening work with a minimum diameter of 6 mm.

[0042] As Figure 3 shown, in some more preferred embodiments, the large-aperture wire cutting automatic wire threading device further includes a guiding member 10. The guiding member 10 is arranged on the lower eye mold 52 of the wire cutting device and is used to guide the end of the wire guiding device 8 that passes out downward from the upper beam wire guiding tube 6 into the lower beam wire guiding tube 7. The guiding member 10 includes a funnel part and a sleeve part. The inner diameter of the sleeve part is matched with the outer diameter of the lower eye mold 52, and the diameter of the funnel part gradually increases upward from the connection end with the sleeve part.

[0043] The body of the wire guiding device 8 of the present invention is preferably a spring steel wire sheath. Since the spring steel wire sheath has both flexibility and wear resistance, as well as good deformation recovery ability, and its self-weight is relatively heavier than that of general pulling ropes, choosing the spring steel wire sheath as the body of the wire guiding device 8 can utilize its flexibility to smoothly pass through the wire guiding catheter. At the same time, due to its good deformation recovery ability, it can also ensure that it is not easily deformed when pulled out from the wire guiding catheter. And under the action of its own weight, it also ensures that the wire guiding device 8 can freely droop from the vertical pipe orifice of the upper beam wire guiding catheter 6 into the vertical pipe orifice of the lower beam wire guiding catheter 7.

[0044] After the wire guiding device 8 passes through the orifice on the side of the lower beam wire guiding catheter 7 close to the wire storage cylinder 1, it is necessary to fix the end of the molybdenum wire 11 wound around the wire storage cylinder 1 on the wire hanging member 81. To ensure that the molybdenum wire 11 can be conveniently and firmly set on the wire hanging member 81, at least two non-coaxial wire passing holes can be provided on the wire hanging member 81, and the molybdenum wire 11 passes through the two wire passing holes in sequence; since the two wire passing holes are non-coaxial, the wire body of the molybdenum wire 11 will be bent during the perforation process and will not automatically recover. The end of the molybdenum wire is bent into a hook shape and forms a self-locking with the wire passing hole, so that the end of the molybdenum wire can be fixed on the wire guiding device 8 without a complex locking device. As Figure 5 (a) shows that in some preferred embodiments, the end of the wire guiding device 8 is provided with a first wire passing hole 811 and a second wire passing hole 812. Both the first wire passing hole 811 and the second wire passing hole 812 are vertically arranged through the body length direction of the wire guiding device 8, and the first wire passing hole 811 and the second wire passing hole 812 are parallel to each other. As Figure 5 (b) shows that in some more excellent embodiments, the end of the wire guiding device 8 is provided with a first wire passing hole 811 and a second wire passing hole 812. The first wire passing hole 811 is inclined from the center of the end face of the wire guiding device 8 to the outer wall of the wire guiding device 8 and penetrates through. The second wire passing hole 812 is inclined from one outer wall of the wire guiding device 8 to penetrate through to the other outer wall of the wire guiding device 8, and the included angle between the second wire passing hole 812 and the first wire passing hole 811 is an acute angle.

[0045] After the end of the molybdenum wire is fixed on the wire hanging member 81, under the reverse power action of the power component 9, the wire guiding device 8 pulls the molybdenum wire 11 in the reverse direction along the entire wire guiding path, passes through the lower beam 5 and the upper beam 4 of the wire cutting device in sequence, resets to the upper end of the wire storage cylinder 1, and fixes the end of the molybdenum wire on the wire storage cylinder 1 to complete the wire threading work of the molybdenum wire 11. To ensure that the molybdenum wire 11 will not break due to excessive tension during the subsequent wire cutting process, a tension wheel assembly can be set on the entire wire guiding path to adjust the tension of the molybdenum wire 11; after the tension of the molybdenum wire 11 is adjusted by the tension adjustment assembly, it remains in a tensioned state.

[0046] During the wire cutting and hole opening process, the molybdenum wire 11 always remains in a tensioned state. Further, to avoid the problem that the molybdenum wire 11 is prone to breakage due to friction between the molybdenum wire 11 and the inner wall of the wire guiding conduit under the tensioned state, the present invention designs the wire guiding conduit to be offset relative to the molybdenum wire tensioning position, and wire passing slots are provided on the tube body of one side of the wire guiding conduit facing the molybdenum wire tensioning position, so that the molybdenum wire 11 passes through the wire guiding conduit from the wire passing slot under the tensioned state, forming an independent molybdenum wire tensioning loop, and the molybdenum wire 11 is completely separated from the wire guiding conduit in the molybdenum wire tensioning loop. As shown in FIGS. 2 and Figure 4 As shown, in some preferred embodiments, the upper beam wire guiding conduit 6 is offset upward relative to the molybdenum wire tensioning position, and the lower beam wire guiding conduit 7 is offset downward relative to the molybdenum wire tensioning position; and the wire passing slot of the upper beam wire guiding conduit 6 is provided on its lower side wall, and the wire passing slot of the tube body of the upper guide wire wheel 41 of the upper beam wire guiding conduit 6 that bends downward is provided on the side facing the upper guide wire wheel 41. The wire passing slot of the lower beam wire guiding conduit 7 is provided on its upper side wall, and the wire passing slot of the tube body of the lower beam wire guiding conduit 7 that bends upward around the lower guide wire wheel 51 is provided on the side facing the upper guide wire wheel 41. As shown in Figure 4 FIG. 4, when the molybdenum wire 11 is tensioned, the molybdenum wire 11 in the upper beam wire guiding conduit 6 passes through the wire guiding conduit from the wire passing slot and winds around the upper guide wire wheel 41, and the molybdenum wire 11 in the lower beam wire guiding conduit 7 passes through the wire guiding conduit from the wire passing slot and winds around the lower guide wire wheel 51, so that the tensioned molybdenum wire 11 is completely separated from the wire guiding conduit, avoiding the problem that the molybdenum wire 11 is prone to breakage due to friction with the conduit during the subsequent wire cutting and hole opening process.

[0047] The power component 9 includes two driving wheels, and the two driving wheels are tangentially arranged on the base of the wire storage cylinder 1 through a mounting seat. The wire guiding device 8 is clamped between the two driving wheels, and by driving the driving wheels to rotate forward or backward, the wire guiding device 8 is controlled to perform a wire passing walking action or a reset traction molybdenum wire 11 action.

[0048] The wire passing process of the large and medium aperture wire cutting automatic wire threading device provided by the present invention is as follows:

[0049] Drive the power component 9, insert one end of the wire guiding device 8 with the wire hanging member 81 into the upper beam wire guiding conduit 6, and under the drive of the driving component, the wire guiding device 8 walks along the upper beam wire guiding conduit 6 to the free end of the upper beam, and walks vertically downward along the tube body and passes through the upper eye mold 42. The wire guiding device 8 continues to walk downward, passes through the prefabricated wire passing hole of the workpiece placed on the cutting table 3, enters the lower beam wire guiding conduit 7 from the lower eye mold 52 under the guidance of the guiding member 10, and is bent and deflected under the guidance of the lower beam wire guiding conduit 7, and walks along the lower beam wire guiding conduit 7 to a position near the lower end of the wire storage cylinder 1.

[0050] The end of the molybdenum wire wound around the wire storage cylinder 1 is sequentially passed through the first wire threading hole 811, the second wire threading hole 812, and the first wire threading hole 811 on the wire hanging member 81 to form a circuitous winding, thereby locking the end of the molybdenum wire. The power component 9 is driven in the reverse direction to drive the wire drawing device 8 to pull the molybdenum wire 11 in turn and pass through the lower beam wire guiding conduit 7, the prefabricated wire threading hole of the workpiece, and the upper beam wire guiding conduit 6 to the upper end of the wire storage cylinder 1, so as to realize full-path guiding automatic wire threading. Finally, the end of the molybdenum wire is fixed on the wire tightening bolt on the wire storage cylinder 1 to complete the construction of the molybdenum wire loop.

[0051] The molybdenum wire 11 forming the loop is hung on the tension wheel to make the molybdenum wire 11 taut. At this time, the molybdenum wire 11 in the upper beam wire guiding conduit 6 passes out of the upper beam wire guiding conduit 6 through the wire threading notch and winds around the upper wire guiding wheel 41, and the molybdenum wire 11 in the lower beam wire guiding conduit 7 passes out of the lower beam wire guiding conduit 7 through the wire threading notch and winds around the lower wire guiding wheel 51 to form an independent molybdenum wire tensioning loop.

[0052] The automatic wire threading device for large and medium-sized aperture wire cutting provided by the present invention constructs a full wire guiding path through the wire guiding conduit, uses the wire drawing device 8 as the transmission main body, and the power component 9 drives the wire drawing device 8 to sequentially wind around the upper beam 4 and the lower beam 5 of the wire cutting device from the upper end of the wire storage cylinder 1 of the wire cutting device to the lower end of the wire storage cylinder 1 along the full wire guiding path; and under the action of the power component 9, the wire drawing device 8 pulls the molybdenum wire 11 in the reverse direction along the full wire guiding path and resets it to the upper end of the wire storage cylinder 1, and the wire drawing device 8 conducts full-path guiding on the molybdenum wire 11 to realize full-path guiding automatic wire threading, so as to solve the problem that the molybdenum wire 11 is prone to deviating from the wire threading path in the prior art. The automatic wire threading device for large and medium-sized aperture wire cutting has a simple structure, is convenient to install, and has extremely low manufacturing and transformation costs, realizes the transformation of low-cost wire cutting automatic wire threading equipment, and greatly reduces the processing cost of wire cutting automatic wire threading.

[0053] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to form equivalent embodiments with equivalent changes, but as long as it does not depart from the technical content of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An automatic wire threading device for medium and large aperture wire cutting, characterized in that: include: A wire guiding conduit, the wire guiding conduit comprising an upper beam wire guiding conduit (6) and a lower beam wire guiding conduit (7), the upper beam wire guiding conduit (6) and the lower beam wire guiding conduit (7) are respectively extended along the length direction of the upper beam (4) and the lower beam (5) of the wire cutting device, and the pipe openings close to one end of the wire guide wheel are arranged opposite to each other up and down, and the upper beam wire guiding conduit (6) and the lower beam wire guiding conduit (7) are combined to form a full wire guiding path; A wire guide (8), the wire guide (8) comprising a flexible body with a diameter matching the inner diameter of the wire guide tube and a length greater than the length of the entire wire guide path, and a wire hanging piece (81) being provided at one end of the body; A power component (9) is used to drive the wire guide (8) from the upper end of the wire storage barrel (1) of the wire cutting device along the entire wire guiding path to the lower end of the wire storage barrel (1), and to pull the wire guide (8) in the reverse direction to reset it to the upper end of the wire storage barrel (1).

2. The automatic wire threading device for medium and large aperture wire cutting according to claim 1 is characterized in that: The tube body of the upper beam wire guide tube (6) extends from a position close to the upper end of the wire storage barrel (1) to the free end of the upper beam, one end of which is inclined and bent downward toward the wire storage barrel (1), and the other end of which is bent downward to a vertical angle by an upper wire guide wheel (41) of a wire cutting device; the tube body of the lower beam wire guide tube (7) extends from the free end of the lower beam to a position close to the lower end of the wire storage barrel (1), one end of which is inclined and bent toward the wire storage barrel (1), and the other end of which is bent upward to a vertical angle by a lower wire guide wheel (51) of a wire cutting device.

3. The automatic wire threading device for medium and large aperture wire cutting according to claim 2 is characterized in that: The upper wire guide wheel (41) of the wire cutting device at the end of the upper beam wire guiding duct (6) is bent downward to a vertical angle and aligned with the upper eye mold (42) of the wire cutting device; the lower wire guide wheel (51) of the wire cutting device at the end of the lower beam wire guiding duct (7) is bent upward to a vertical angle and aligned with the lower eye mold (52) of the wire cutting device.

4. The automatic wire threading device for medium and large aperture wire cutting according to claim 1 is characterized in that: The wire guiding conduit is offset relative to the molybdenum wire tensioning position, and a wire threading slot is provided on the tube body of the wire guiding conduit on one side facing the molybdenum wire tensioning position.

5. The automatic wire threading device for medium and large aperture wire cutting according to claim 1 is characterized in that: The main body of the wire guide (8) is a spring steel wire sheath.

6. The automatic wire threading device for medium and large aperture wire cutting according to claim 1, characterized in that: The wire hanging member (81) is provided with at least two wire threading holes with different axes.

7. The automatic wire threading device for medium and large aperture wire cutting according to claim 6, characterized in that: The end of the wire guide (8) is provided with a first wire threading hole (811) and a second wire threading hole (812), the first wire threading hole (811) is obliquely arranged from the center of the end face of the wire guide (8) to penetrate the outer wall of the wire guide (8), and the second wire threading hole (812) is obliquely arranged from the outer wall of one side of the wire guide (8) to penetrate the outer wall of the other side of the wire guide (8), and the angle between the second wire threading hole (812) and the first wire threading hole (811) is an acute angle.

8. The automatic wire threading device for medium and large aperture wire cutting according to claim 1, characterized in that: The power component (9) is arranged close to the wire storage barrel (1), and comprises two tangentially arranged driving wheels, and the wire guide (8) is clamped between the two driving wheels.

9. The automatic wire threading device for medium and large aperture wire cutting according to claim 1, characterized in that: The medium and large aperture wire cutting automatic wire threading device also includes a guide member (10), which is arranged on a lower eye mold (52) of the wire cutting device and is used to guide the end of the wire guide (8) passing downward from the upper beam wire guide tube (6) into the lower beam wire guide tube (7).

10. The automatic wire threading device for medium and large aperture wire cutting according to claim 1, characterized in that: A tension wheel assembly is provided on the entire wire drawing path.

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