Wire cut electrical discharge machining equipment

Abstract

The invention provides wire cut electrical discharge machining equipment, and belongs to the technical field of wire cut electrical discharge machining equipment, the wire cut electrical discharge machining equipment comprises a lower eye mold, an upper eye mold, a movable wire guide pipe, a driving assembly and a conveying assembly, the upper eye mold and the lower eye mold are distributed up and down at intervals, one end of the movable wire guide pipe extends to the position above the lower eye mold, and the other end of the movable wire guide pipe extends to the position above the driving assembly; one end of the movable wire guide pipe is connected with the upper eye mold, the other end of the movable wire guide pipe extends into the lower eye mold and is movably matched with the lower eye mold, the driving assembly is installed on one side of the lower eye mold and used for driving the movable wire guide pipe to move up and down relative to the lower eye mold, the movable wire guide pipe penetrates through a machining hole of a workpiece when moving upwards, a fixed wire guide pipe is arranged on the lower portion of the upper eye mold, and the fixed wire guide pipe is connected with the movable wire guide pipe. The number of the conveying assemblies is two, and the two conveying assemblies are arranged in the upper eye mold and the lower eye mold correspondingly. Compared with the prior art, the automatic wire threading operation of the electrode wire can be achieved, manual wire threading is not needed, and the beneficial effects of being good in wire threading effect and high in wire threading efficiency are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wire cutting equipment, and specifically relates to an electric discharge wire cutting equipment. Background Art

[0002] A traveling wire cutting equipment is an electric discharge wire cutting machine tool. It uses a continuously moving thin metal wire as an electrode to perform pulsed spark discharge on a metal material workpiece, generating high temperature at the contact point between the metal material workpiece and the metal wire, and then eroding the metal to achieve the cutting of the workpiece, which is a numerical control machine tool.

[0003] Currently, when wire cutting a workpiece, a wire threading operation is required, that is, passing the electrode wire through the processing hole of the workpiece. Most traditional wire threading methods rely on manual wire threading. On the one hand, manual wire threading is prone to being scratched by the electrode wire, presenting certain safety hazards. On the other hand, since the electrode wire is relatively thin and soft, it is not easy to control the electrode wire during manual wire threading, and the electrode wire is prone to bending within the processing hole of the workpiece, resulting in unsatisfactory wire threading effect and relatively low wire threading efficiency. Summary of the Invention

[0004] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the embodiments of the present invention is to provide an electric discharge wire cutting equipment.

[0005] To solve the above technical problem, the present invention provides the following technical solutions:

[0006] An electric discharge wire cutting equipment, including a lower eye mold, an upper eye mold, a movable wire guiding tube, a driving component, and a conveying component.

[0007] The upper eye mold and the lower eye mold are arranged at intervals up and down.

[0008] One end of the movable wire guiding tube extends above the lower eye mold, and the other end extends into the lower eye mold and is movably matched with the lower eye mold.

[0009] The driving component is installed on one side of the lower eye mold and is used to drive the movable wire guiding tube to move up and down relative to the lower eye mold. When the movable wire guiding tube moves up, it passes through the processing hole of the workpiece.

[0010] A fixed wire guiding tube is provided at the lower part of the upper eye mold.

[0011] There are two sets of the conveying components, and the two sets of conveying components are respectively arranged inside the upper eye mold and the lower eye mold. The two sets of conveying components are used to convey the electrode wire.

[0012] As a further improvement of the present invention: The movable wire guiding tube includes a tube body.

[0013] The driving assembly includes a driving motor, a driving gear, and a driving rack.

[0014] The driving motor is fixedly installed on the upper part of the lower eye mold. The driving gear is arranged at the output end of the driving motor. The driving rack is fixedly arranged on the side wall of the pipe body and is distributed along the length direction of the pipe body. The driving rack meshes with the driving gear.

[0015] As a further improvement of the present invention: A plurality of guiding sheets are hingedly arranged at the upper end of the pipe body, and the plurality of guiding sheets are annularly and spacedly distributed at the upper end of the pipe body.

[0016] An active collar and a fixed collar are arranged on the side wall of the pipe body. The active collar is located above the fixed collar. The active collar is movably matched with the pipe body. The fixed collar is fixedly connected to the pipe body. The active collar and the fixed collar are connected by a first elastic member, and the first elastic member is used to provide elastic support for the active collar.

[0017] A set of pull rods are connected to the outer side wall of each group of guiding sheets, and one ends of the plurality of pull rods away from the corresponding guiding sheets are connected to the active collar.

[0018] As a further improvement of the present invention: The pull rod is made of an elastic material.

[0019] As a further improvement of the present invention: The conveying assembly includes two conveying rollers and a power mechanism for driving the two conveying rollers to rotate. The two conveying rollers are oppositely distributed.

[0020] As a further improvement of the present invention: Support plates are arranged on the sides of the two conveying rollers. Rotating rods are fixedly arranged at the ends of the two conveying rollers. One end of the rotating rod away from the conveying roller penetrates through the support plate and is rotatably matched with the support plate.

[0021] The power mechanism includes a first pulley, a transmission belt, a second pulley, and a motor shaft.

[0022] The first pulley is fixedly arranged at one end of the rotating rod away from the conveying roller. One end of the motor shaft is connected to an external motor, and the other end is connected to the second pulley. One end of the transmission belt is sleeved outside the first pulley, and the other end is sleeved outside the second pulley.

[0023] As a further improvement of the present invention: The support plate is obliquely arranged, and a limiting assembly is arranged on the side wall of the support plate.

[0024] When the external motor runs forward, the conveying roller can be driven to rotate by means of the second pulley, the transmission belt and the first pulley to convey the electrode wire. When the external motor runs backward, the limiting component can be used to drive the support plate to rotate, and then drive the conveying roller away from the electrode wire.

[0025] As a further improvement of the present invention: The limiting component includes a rotating shaft, a second elastic member, a first wedge block and a second wedge block.

[0026] The rotating shaft penetrates through the support plate and is rotationally matched with the support plate. The end of the rotating shaft is fixedly connected to the second pulley. The second wedge block is fixedly arranged on the circumferential side wall of the rotating shaft. The first wedge block is slidably installed on the side wall of the support plate. The second elastic member is arranged on one side of the first wedge block and is used to provide elastic support for the first wedge block.

[0027] As a further improvement of the present invention: A guide rail and a fixed seat are fixedly arranged on the side wall of the support plate. The fixed seat is located at one end of the guide rail. The first wedge block is slidably matched with the guide rail. One end of the second elastic member is connected to the fixed seat, and the other end is connected to the first wedge block.

[0028] As a further improvement of the present invention: The first elastic member and the second elastic member are springs or metal shrapnel.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] In the embodiment of the present invention, when threading the wire, the workpiece can be placed on the processing table and clamped and fixed by means of the fixing mechanism on the processing table. At this time, the lower eye mold is located below the workpiece, and the upper eye mold is located above the workpiece. Then, the driving component is used to drive the movable wire guide tube to move upward relative to the lower eye mold. When the movable wire guide tube moves upward, it passes through the processing hole of the workpiece from bottom to top and then docks with the fixed wire guide tube at the lower part of the upper eye mold. Subsequently, the conveying component inside the upper eye mold conveys the electrode wire, so that the electrode wire moves downward along the inside of the fixed wire guide tube. When the electrode wire moves downward, it enters the inside of the movable wire guide tube from the inside of the fixed wire guide tube, then enters the inside of the lower eye mold from the inside of the movable wire guide tube, and finally the conveying component inside the lower eye mold continues to convey the electrode wire, so that the electrode wire passes through the processing hole of the workpiece to complete the wire threading operation. After the wire threading is completed, the driving component drives the movable wire guide tube to move downward relative to the lower eye mold, so that the movable wire guide tube exits from the inside of the processing hole of the workpiece, and then exposes the electrode wire in the processing hole of the workpiece. Compared with the prior art, it can realize the automatic wire threading operation of the electrode wire without manual wire threading, and has the advantages of good wire threading effect and high wire threading efficiency. Description of the Drawings

[0031] Figure 1 Schematic structure of a wire electrical discharge machining device Figure 1 ;

[0032] Figure 2 Schematic structure of a wire electrical discharge machining device Figure 2 ;

[0033] Figure 3 Schematic diagram of the structure of the conveying component in a wire electrical discharge machining device;

[0034] Figure 4 is Figure 1 Enlarged schematic diagram of area A in;

[0035] Figure 5 is Figure 1 Enlarged schematic diagram of area B in;

[0036] Figure 6 is Figure 2 Enlarged schematic diagram of area C in;

[0037] Figure 7 is Figure 3 Enlarged schematic diagram of area D in;

[0038] In the figure: 10 - lower eye mold, 20 - upper eye mold, 30 - movable wire guide tube, 301 - tube body, 302 - pull rod, 303 - guide piece, 304 - movable collar, 305 - first elastic member, 306 - fixed collar, 40 - fixed wire guide tube, 50 - drive assembly, 501 - drive motor, 502 - drive gear, 503 - drive rack, 60 - workpiece, 70 - conveying component, 701 - conveying roller, 702 - first pulley, 703 - support plate, 704 - transmission belt, 705 - rotating shaft, 706 - second pulley, 707 - motor shaft, 708 - fixed seat, 709 - guide rail, 710 - second elastic member, 711 - first wedge block, 712 - second wedge block. Detailed implementation manners

[0039] The technical solutions of the present invention will be further described in detail below in combination with specific implementation manners.

[0040] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "coupling", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Please refer to Figure 1 , Figure 2 and Figure 3 , this embodiment provides a wire electrical discharge machining device, including a lower eye mold 10, an upper eye mold 20, a movable wire guide tube 30, a driving assembly 50, and a conveying assembly 70. The upper eye mold 20 and the lower eye mold 10 are spaced apart vertically. One end of the movable wire guide tube 30 extends above the lower eye mold 10, and the other end extends into the lower eye mold 10 and is movably engaged with the lower eye mold 10. The driving assembly 50 is installed on one side of the lower eye mold 10 and is used to drive the movable wire guide tube 30 to move up and down relative to the lower eye mold 10. When the movable wire guide tube 30 moves upward, it passes through the machining hole of the workpiece 60. A fixed wire guide tube 40 is provided at the lower part of the upper eye mold 20. There are two sets of the conveying assemblies 70, and the two sets of the conveying assemblies 70 are respectively arranged inside the upper eye mold 20 and the lower eye mold 10. The two sets of the conveying assemblies 70 are used to convey the electrode wire.

[0044] When performing the wire threading operation, the workpiece 60 can be placed on a processing table (not shown in the figure) and clamped and fixed by a fixing mechanism (not shown in the figure) on the processing table. At this time, the lower eye mold 10 is located below the workpiece 60, and the upper eye mold 20 is located above the workpiece 60. Then, the driving assembly 50 is used to drive the movable wire guide tube 30 to move upward relative to the lower eye mold 10. When the movable wire guide tube 30 moves upward, it passes through the processing hole of the workpiece 60 from bottom to top and then docks with the fixed wire guide tube 40 at the lower part of the upper eye mold 20. Subsequently, the conveying assembly 70 inside the upper eye mold 20 conveys the electrode wire, so that the electrode wire moves downward along the inside of the fixed wire guide tube 40. When the electrode wire moves downward, it enters the inside of the movable wire guide tube 30 from the inside of the fixed wire guide tube 40, then enters the inside of the lower eye mold 10 from the inside of the movable wire guide tube 30, and finally, the conveying assembly 70 inside the lower eye mold 10 continues to convey the electrode wire, so that the electrode wire passes through the processing hole of the workpiece 60 to complete the wire threading operation. After the wire threading is completed, the driving assembly 50 drives the movable wire guide tube 30 to move downward relative to the lower eye mold 10, so that the movable wire guide tube 30 exits from the inside of the processing hole of the workpiece 60, and then the electrode wire is exposed inside the processing hole of the workpiece 60.

[0045] Please refer to Figure 4 、 Figure 5 and Figure 6 , in one embodiment, the movable wire guide tube 30 includes a tube body 301, the driving assembly 50 includes a driving motor 501, a driving gear 502 and a driving rack 503. The driving motor 501 is fixedly installed on the upper part of the lower eye mold 10. The driving gear 502 is arranged at the output end of the driving motor 501. The driving rack 503 is fixedly arranged on the side wall of the tube body 301 and is distributed along the length direction of the tube body 301. The driving rack 503 meshes with the driving gear 502.

[0046] After the workpiece 60 is clamped and fixed by the fixing mechanism on the processing table, the driving motor 501 drives the driving gear 502 to rotate. Then, through the meshing action of the driving gear 502 and the driving rack 503, the tube body 301 moves upward relative to the lower eye mold 10. When the tube body 301 moves upward, it passes through the processing hole of the workpiece 60 from bottom to top and is butted with the fixed wire guide tube 40. After the butting is completed, the conveying assembly 70 inside the upper eye mold 20 conveys the electrode wire, so that the electrode wire enters the inside of the lower eye mold 10 through the fixed wire guide tube 40 and the movable wire guide tube 30. Then, the conveying assembly 70 inside the lower eye mold 10 continues to convey the electrode wire, so that the electrode wire passes through the processing hole of the workpiece 60, realizing the automatic wire threading operation of the electrode wire. After the wire threading of the electrode wire is completed, the driving motor 501 drives the driving gear 502 to rotate in the reverse direction. Then, through the reverse meshing action of the driving gear 502 and the driving rack 503, the tube body 301 moves downward relative to the lower eye mold 10. When the wire guide tube 30 moves downward, it exits from the processing hole of the workpiece 60, so as to expose the electrode wire in the processing hole of the workpiece 60, and then perform wire cutting processing on the workpiece 60.

[0047] Please refer to Figure 4 and Figure 5 In one embodiment, a plurality of guiding pieces 303 are hinged to the upper end of the tube body 301. The plurality of guiding pieces 303 are annularly and spaced apart at the upper end of the tube body 301. An activity collar 304 and a fixed collar 306 are arranged on the side wall of the tube body 301. The activity collar 304 is located above the fixed collar 306. The activity collar 304 is movably matched with the tube body 301. The fixed collar 306 is fixedly connected with the tube body 301. The activity collar 304 and the fixed collar 306 are connected by a first elastic member 305. The first elastic member 305 is used to provide elastic support for the activity collar 304. A set of pull rods 302 are connected to the outer side wall of each group of guiding pieces 303. One ends of the plurality of pull rods 302 far away from the corresponding guiding pieces 303 are connected with the activity collar 304.

[0048] Initially, several guiding pieces 303 are kept vertical at the upper end of the tube body 301. When the driving motor 501 drives the driving gear 502 to rotate, and drives the tube body 301 to move upward relative to the lower eye mold 10 through the meshing action between the driving gear 502 and the driving rack 503, the tube body 301 drives the several guiding pieces 303, several pull rods 302, the movable collar 304, the first elastic member 305, and the fixed collar 306 to move upward as a whole. When the tube body 301 passes through the processing hole of the workpiece 60 from bottom to top, the several guiding pieces 303 move to a position above the workpiece 60, and the movable collar 304 acts on the lower surface of the workpiece 60. As the tube body 301 continues to move upward, the movable collar 304 is subjected to the pressure of the lower surface of the workpiece 60 and then moves downward along the outside of the tube body 301. The first elastic member 305 is compressed under force. When the movable collar 304 moves downward, it pulls the several guiding pieces 303 through the several pull rods 302, causing the several guiding pieces 303 to rotate toward the outside of the tube body 301. When the several guiding pieces 303 rotate outward, a conical structure is formed, and thus the lower end of the fixed wire guide tube 40 is covered therein. In this way, when the conveying component 70 inside the upper eye mold 20 conveys the electrode wire subsequently, the electrode wire can smoothly enter the inside of the tube body 301 by means of this conical structure, thereby completing the transition of the electrode wire between the fixed wire guide tube 40 and the tube body 301, and further improving the wire threading effect. When the electrode wire enters the inside of the lower eye mold 10 from the inside of the tube body 301, the conveying component 70 in the lower eye mold 10 continues to convey the electrode wire, and then the driving motor 501 drives the driving gear 502 to rotate in the reverse direction, and drives the tube body 301 to move downward by means of the reverse meshing action between the driving gear 502 and the driving rack 503. When the tube body 301 moves downward, it drives the fixed collar 306 to move downward, the first elastic member 305 gradually elongates, and the movable collar 304 moves upward along the outside of the tube body 301, and then pushes the several guiding pieces 303 through the several pull rods 302 to make the several guiding pieces 303 rotate toward the inside of the tube body 301, thereby realizing the reset of the several guiding pieces 303. After the several guiding pieces 303 are reset, as the tube body 301 continues to move downward, the tube body 301 drives the several guiding pieces 303 to withdraw from the processing hole of the workpiece 60.

[0049] In one embodiment, the pull rod 302 is made of an elastic material, such as rubber or elastic metal, etc. When the movable collar 304 acts on the lower surface of the workpiece 60 and then moves downward relative to the outside of the tube body 301, the pull rod 302 made of an elastic material can generate adaptive deformation when pulling the guiding piece 303, so as to ensure that the guiding piece 303 can be smoothly pulled and then smoothly rotate toward the outside of the tube body 301.

[0050] Please refer to Figure 3 , in one embodiment, the conveying component 70 includes two sets of conveying rollers 701 and a power mechanism for driving the two sets of conveying rollers 701 to rotate. The two sets of conveying rollers 701 are distributed oppositely.

[0051] When the tube body 301 passes through the processing hole of the workpiece 60 from bottom to top and several guiding pieces 301 rotate outward to form a conical structure, the power mechanism corresponding to the conveying component 70 in the upper eye mold 20 drives the corresponding two sets of conveying rollers 701 to rotate. The two sets of conveying rollers 701 clamp the electrode wire and then convey the electrode wire downward, so that the electrode wire enters the inside of the tube body 301 from the inside of the fixed wire guide tube 40, and then enters the inside of the lower eye mold 10 from the inside of the tube body 301. Subsequently, the power mechanism corresponding to the conveying component 70 in the lower eye mold 10 drives the corresponding two sets of conveying rollers 701 to rotate. The two sets of conveying rollers 701 clamp the electrode wire and then continue to convey the electrode wire downward.

[0052] Please refer to Figure 3 In one embodiment, support plates 703 are arranged on the sides of the two sets of conveying rollers 701. Rotating rods are fixedly arranged at the ends of the two sets of conveying rollers 701. One end of the rotating rod far away from the conveying roller 701 penetrates through the support plate 703 and is rotationally matched with the support plate 703. The power mechanism includes a first pulley 702, a transmission belt 704, a second pulley 706, and a motor shaft 707. The first pulley 702 is fixedly arranged at one end of the rotating rod far away from the conveying roller 701. One end of the motor shaft 707 is connected to an external motor (not shown in the figure), and the other end is connected to the second pulley 706. One end of the transmission belt 704 is sleeved outside the first pulley 702, and the other end is sleeved outside the second pulley 706.

[0053] The external motor drives the motor shaft 707 to rotate, thereby driving the second pulley 706 to rotate. When the second pulley 706 rotates, it drives the rotating rod to rotate through the transmission of the transmission belt 704 and the first pulley 702, thereby driving the two sets of conveying rollers 701 to rotate relatively. When the two sets of conveying rollers 701 rotate relatively, they drive the electrode wire to move downward through the frictional conveying action with the electrode wire, realizing the wire threading operation of the electrode wire.

[0054] Please refer to Figure 3 and Figure 7 In one embodiment, the support plate 703 is obliquely arranged. A limiting component is arranged on the side wall of the support plate 703. When the external motor runs forward, the second pulley 706, the transmission belt 704, and the first pulley 702 can be used to drive the conveying roller 701 to rotate to convey the electrode wire. When the external motor runs in reverse, the limiting component can be used to drive the support plate 703 to rotate, thereby driving the conveying roller 701 away from the electrode wire, so that the electrode wire will not damage the conveying roller 701 due to the high-speed movement of the electrode wire during the subsequent wire cutting of the workpiece 60.

[0055] Please refer to Figure 3 and Figure 7, in one embodiment, the limiting component includes a rotating shaft 705, a second elastic member 710, a first wedge block 711, and a second wedge block 712. The rotating shaft 705 penetrates through the support plate 703 and is rotationally engaged with the support plate 703. The end of the rotating shaft 705 is fixedly connected to the second pulley 706. The second wedge block 712 is fixedly arranged on the circumferential side wall of the rotating shaft 705. The first wedge block 711 is slidably installed on the side wall of the support plate 703. The second elastic member 710 is arranged on one side of the first wedge block 711 and is used to provide elastic support for the first wedge block 711.

[0056] When the external motor moves forward to drive the motor shaft 707 and the second pulley 706 to rotate forward, the support plate 703 is inclined. The two conveying rollers 701 are attached to the opposite sides of the electrode wire. The forward rotation of the second pulley 706 drives the transmission belt 704 and the first pulley 702 to rotate forward. When the first pulley 702 rotates forward, it drives the conveying roller 701 to rotate forward through the rotating rod, thereby conveying the electrode wire downward. During this process, the second pulley 706 drives the rotating shaft 705 to rotate forward synchronously. The inclined surface of the second wedge block 712 on the circumferential side wall of the rotating shaft 705 repeatedly acts on the inclined surface of the first wedge block 711, thereby repeatedly pushing the first wedge block 711 so that the first wedge block 711 slides repeatedly along the side wall of the support plate 703, and the second elastic member 710 is repeatedly compressed; when the electrode wire conveying is completed, the external motor runs in reverse to drive the motor shaft 707 to rotate in reverse. The motor shaft 707 drives the second pulley 706 and the rotating shaft 705 to rotate in reverse. When the rotating shaft 705 rotates in reverse, it drives the second wedge block 712 on its circumferential side wall to rotate in reverse. At this time, the vertical surface of the second wedge block 712 acts on the vertical surface of the first wedge block 711, thereby pushing the first wedge block 711 to rotate the support plate 703. When the support plate 703 rotates, it drives the conveying roller 701 away from the electrode wire, so that the conveying roller 701 is separated from the electrode wire, facilitating the wire cutting process of the electrode wire for the workpiece 60 in the subsequent process without being interfered by the conveying roller 701, and at the same time avoiding damage to the conveying roller 701.

[0057] Please refer to Figure 7 , in one embodiment, a guide rail 709 and a fixed seat 708 are fixedly arranged on the side wall of the support plate 703. The fixed seat 708 is located at one end of the guide rail 709. The first wedge block 711 is slidably engaged with the guide rail 709. One end of the second elastic member 710 is connected to the fixed seat 708, and the other end is connected to the first wedge block 711.

[0058] When the rotating shaft 705 rotates forward to drive the second wedge block 712 to rotate forward, the inclined surface of the second wedge block 712 repeatedly acts on the inclined surface of the first wedge block 711, thereby pushing the first wedge block 711 to slide back and forth along the guide rail 709, and the second elastic member 710 is repeatedly compressed.

[0059] In one embodiment, the first elastic member 305 and the second elastic member 710 may be springs or metal shrapnel, and there is no limitation here.

[0060] The working principle of the present invention is as follows:

[0061] Place the workpiece 60 to be cut on the workbench and clamp it with the fixing mechanism. Then start the driving motor 501, drive the driving gear 502 to rotate forward through the driving motor 501, and drive the pipe body 301 to move upward by the meshing action of the driving gear 502 and the driving rack 503. When the pipe body 301 moves upward, it passes through the processing hole of the workpiece 60 from bottom to top. After the upper end of the pipe body 301 extends above the workpiece 60, the movable collar 304 acts on the lower surface of the workpiece 60 and then slides downward relative to the outside of the pipe body 301. The movable collar 304 pulls a plurality of guide pieces 303 through a plurality of pull rods 302, so that the plurality of guide pieces 303 rotate outward and form a conical structure outside the lower end of the fixed wire guide tube 40. Then the power mechanism in the upper eye mold 20 drives the two sets of conveying rollers 701 to rotate relatively, thereby conveying the electrode wire downward, so that the electrode wire penetrates into the pipe body 301 from the inside of the fixed wire guide tube 40, and then penetrates into the lower eye mold 10 from the inside of the pipe body 301. After the electrode wire penetrates into the lower eye mold 10, the power mechanism in the lower eye mold 10 drives the two sets of conveying rollers 701 to rotate relatively, thereby continuing to convey the electrode wire downward. After the electrode wire is conveyed, the driving rod motor 501 drives the driving gear 502 to rotate reversely, and drives the pipe body 301 to move downward by the reverse meshing action of the driving gear 502 and the driving rack 503. When the pipe body 301 moves downward, the movable collar 304 slides upward along the outside of the pipe body 301 under the push of the first elastic member 305, and then pushes a plurality of guide pieces 303 through a plurality of pull rods 302, so that the plurality of guide pieces 303 rotate toward the inner side of the pipe body 301, realizing the reset of the plurality of guide pieces 303. After the reset, the plurality of guide pieces 303 withdraw from the processing hole of the workpiece 60 together with the pipe body 301, thereby exposing the electrode wire in the processing hole of the workpiece 60, and then completing the automatic wire threading operation of the electrode wire; after the electrode wire is threaded, the external motor corresponding to the power mechanism drives the motor shaft 707, the second belt pulley 706, the rotating shaft 705 and the second wedge block 712 to rotate reversely, and the vertical surface of the second wedge block 712 acts on the vertical surface of the first wedge block 711, thereby pushing the support plate 703 to rotate, and the support plate 703 drives the conveying roller 701 away from the electrode wire to prevent the electrode wire from damaging the conveying roller 701 during the subsequent wire cutting of the workpiece 60.

[0062] In the embodiment of the present invention, when the wire threading operation is performed, the workpiece 60 can be placed on a processing table (not shown in the figure) and clamped and fixed by a fixing mechanism (not shown in the figure) on the processing table. At this time, the lower eye mold 10 is located below the workpiece 60, and the upper eye mold 20 is located above the workpiece 60. Then, the driving assembly 50 is used to drive the movable wire guide tube 30 to move upward relative to the lower eye mold 10. When the movable wire guide tube 30 moves upward, it passes through the processing hole of the workpiece 60 from bottom to top and then docks with the fixed wire guide tube 40 at the lower part of the upper eye mold 20. Subsequently, the conveying assembly 70 inside the upper eye mold 20 conveys the electrode wire, so that the electrode wire moves downward along the inside of the fixed wire guide tube 40. When the electrode wire moves downward, it enters the inside of the movable wire guide tube 30 from the inside of the fixed wire guide tube 40, then enters the inside of the lower eye mold 10 from the inside of the movable wire guide tube 30, and finally the conveying assembly 70 inside the lower eye mold 10 continues to convey the electrode wire, so that the electrode wire passes through the processing hole of the workpiece 60 to complete the wire threading operation. After the wire threading is completed, the driving assembly 50 drives the movable wire guide tube 30 to move downward relative to the lower eye mold 10, so that the movable wire guide tube 30 exits from the inside of the processing hole of the workpiece 60, and then exposes the electrode wire in the processing hole of the workpiece 60. Compared with the prior art, the automatic wire threading operation of the electrode wire can be realized, manual wire threading is not required, and it has the advantages of good wire threading effect and high wire threading efficiency.

[0063] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0064] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric spark wire cutting device, characterized in that: It comprises a lower eye mold (10), an upper eye mold (20), a movable wire guide tube (30), a driving component (50) and a conveying component (70). The upper eye mold (20) and the lower eye mold (10) are spaced apart from each other in an upper and lower direction. One end of the movable wire guide tube (30) extends to the top of the lower eye mold (10), and the other end extends to the inside of the lower eye mold (10) and movably cooperates with the lower eye mold (10). The driving assembly (50) is mounted on one side of the lower eye mold (10) and is used to drive the movable wire guide tube (30) to move up and down relative to the lower eye mold (10); when the movable wire guide tube (30) moves up, it passes through the processing hole of the workpiece (60). A fixed wire guide tube (40) is provided at the lower part of the upper eye mold (20). The conveying components (70) are provided in two groups, and the two groups of the conveying components (70) are respectively arranged inside the upper eye mold (20) and the lower eye mold (10), and the two groups of the conveying components (70) are used to convey the electrode wire.

2. The electric spark wire cutting equipment according to claim 1, characterized in that: The movable wire guide tube (30) comprises a tube body (301), The driving assembly (50) comprises a driving motor (501), a driving gear (502) and a driving rack (503). The driving motor (501) is fixedly mounted on the upper part of the lower eye mold (10); the driving gear (502) is arranged at the output end of the driving motor (501); the driving rack (503) is fixedly arranged on the side wall of the tube body (301) and distributed along the length direction of the tube body (301); and the driving rack (503) is meshed with the driving gear (502).

3. The electric spark wire cutting equipment according to claim 2, characterized in that: A plurality of guide plates (303) are hingedly provided at the upper end of the tube body (301), and the plurality of guide plates (303) are distributed at intervals in a ring shape at the upper end of the tube body (301). A movable collar (304) and a fixed collar (306) are provided on the side wall of the tube body (301); the movable collar (304) is located above the fixed collar (306); the movable collar (304) and the tube body (301) are movably matched; the fixed collar (306) and the tube body (301) are fixedly connected; the movable collar (304) and the fixed collar (306) are connected via a first elastic member (305); the first elastic member (305) is used to provide elastic support for the movable collar (304); A group of pull rods (302) are connected to the outer side wall of each group of guide plates (303), and one end of a plurality of pull rods (302) away from the corresponding guide plates (303) is connected to the movable collar (304).

4. The electric spark wire cutting equipment according to claim 3, characterized in that: The pull rod (302) is made of elastic material.

5. The electric spark wire cutting equipment according to claim 3, characterized in that: The conveying assembly (70) comprises two groups of conveying rollers (701) and a power mechanism for driving the two groups of conveying rollers (701) to rotate, and the two groups of conveying rollers (701) are arranged relative to each other.

6. The electric spark wire cutting equipment according to claim 5, characterized in that: Support plates (703) are arranged on the sides of the two groups of conveying rollers (701), and rotating rods are fixedly arranged at the ends of the two groups of conveying rollers (701), and one end of the rotating rod away from the conveying rollers (701) passes through the supporting plate (703) and rotates with the supporting plate (703). The power mechanism comprises a first pulley (702), a transmission belt (704), a second pulley (706) and a motor shaft (707). The first pulley (702) is fixedly arranged at one end of the rotating rod away from the conveying roller (701); one end of the motor shaft (707) is connected to an external motor, and the other end is connected to the second pulley (706); one end of the transmission belt (704) is sleeved on the outside of the first pulley (702), and the other end is sleeved on the outside of the second pulley (706).

7. The electric spark wire cutting equipment according to claim 6, characterized in that: The support plate (703) is arranged to be cut obliquely, and a limit position component is arranged on the side wall of the support plate (703). When the external motor runs in the forward direction, the second pulley (706), the transmission belt (704) and the first pulley (702) can be used to drive the conveying roller (701) to rotate so as to convey the electrode wire. When the external motor runs in the reverse direction, the limiting assembly can be used to drive the support plate (703) to rotate, thereby driving the conveying roller (701) away from the electrode wire.

8. The electric spark wire cutting equipment according to claim 7, characterized in that: The limiting assembly comprises a rotating shaft (705), a second elastic member (710), a first wedge block (711) and a second wedge block (712). The rotating shaft (705) passes through the supporting plate (703) and is rotatably engaged with the supporting plate (703); the end of the rotating shaft (705) is fixedly connected to the second pulley (706); the second wedge block (712) is fixedly arranged on the circumferential side wall of the rotating shaft (705); the first wedge block (711) is slidably mounted on the side wall of the supporting plate (703); and the second elastic member (710) is arranged on one side of the first wedge block (711) for providing elastic support to the first wedge block (711).

9. The electric spark wire cutting equipment according to claim 8, characterized in that: A guide rail (709) and a fixing seat (708) are fixedly arranged on the side wall of the support plate (703); the fixing seat (708) is located at one end of the guide rail (709); the first wedge block (711) is slidably matched with the guide rail (709); one end of the second elastic member (710) is connected to the fixing seat (708), and the other end is connected to the first wedge block (711).

10. The electric spark wire cutting equipment according to claim 8, characterized in that: The first elastic member (305) and the second elastic member (710) are springs or metal springs.

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