An automatic wire threading and guiding mechanism applied to wire cutting

Abstract

The present invention belongs to the technical field of wire cutting processing, and particularly relates to an automatic wire threading and guiding mechanism applied to wire cutting, including an upper machine head, a lower machine head is arranged below the upper machine head; a clamping and opening mechanism, which is arranged on the upper machine head; a cleaning mechanism, which is arranged on the upper machine head; and a clamping and feeding mechanism, there are two clamping and feeding mechanisms which are respectively located on the upper machine head and the lower machine head. The present invention can, through the design of splitting the complete wire guiding tube into two wire guiding half tubes, facilitate reducing the situation of the electrode wire colliding with the inner sides of the two wire guiding half tubes without increasing the diameter size of the two wire guiding half tubes, and can clean the working fluid attached to the inner sides of the wire guiding half tubes through the cleaning mechanism, and can clamp and move the electrode wire through the clamping and feeding mechanism, facilitating the electrode wire to be located inside the two wire guiding half tubes when the two wire guiding half tubes are combined together.

Description

Technical Field

[0001] The present invention belongs to the technical field of wire cutting processing, and particularly relates to an automatic threading and guiding mechanism applied to wire cutting. Background Art

[0002] In wire cutting processing, after fixing the workpiece, it is necessary to pass the electrode wire through the hole on the workpiece so that the electrode wire forms a closed loop with the workpiece as an electrode to achieve material erosion. When automatically threading the electrode wire, a guiding mechanism is required to guide the process of the electrode wire passing through the hole, reducing the situation that the electrode wire is curled and difficult to pass through the workpiece after deviation.

[0003] In the existing automatic threading and guiding mechanism applied to wire cutting, the wire guiding tube is generally sleeved on the electrode wire. During wire cutting processing, the electrode wire inevitably undergoes lateral vibration, making it easy for the electrode wire to collide with the inner wall of the wire guiding tube, affecting the stability of the electrode wire. Moreover, the diameter size of the wire guiding tube is generally fixed. If the diameter size is increased, although the collision situation can be reduced, the guiding effect decreases, and it is not convenient to pass the wire guiding tube through the hole with a small diameter on the workpiece. Reducing the situation of collision between the electrode wire and the inner wall of the wire guiding tube without increasing the diameter size of the wire guiding tube is a problem that the current guiding mechanism needs to solve. During wire cutting, working fluid is generally sprayed onto the electrode wire. When threading the wire, the electrode wire passing through the wire guiding tube easily adheres the working fluid to the inner wall of the wire guiding tube, making it easy for the electrode wire to be hindered by these working fluids during wire threading, affecting the guiding accuracy, and it needs to be cleaned. However, for the traditional wire guiding tube, in order to facilitate guiding, the inner diameter is usually small, making it difficult for the cleaning tool to reach the inside of the wire guiding tube for cleaning, resulting in insufficient convenience. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic threading and guiding mechanism applied to wire cutting, which can reduce the situation of collision between the electrode wire and the inner sides of two half wire guiding tubes without increasing the diameter size of the two half wire guiding tubes through the design of splitting the complete wire guiding tube into two half wire guiding tubes, and can clean the working fluid attached to the inner sides of the half wire guiding tubes through a cleaning mechanism, and can clamp and move the electrode wire through a clamping and feeding mechanism, facilitating the electrode wire to be located inside the two half wire guiding tubes when the two half wire guiding tubes are combined together.

[0005] The technical solution adopted by the present invention is specifically as follows:

[0006] An automatic threading and guiding mechanism applied to wire cutting, comprising:

[0007] An upper machine head, with a lower machine head arranged below the upper machine head;

[0008] The opening and closing mechanism is arranged on the upper machine head. The opening and closing mechanism includes a lifting plate slidably mounted on the upper machine head in the vertical direction, and wire guiding semi-tubes are slidably mounted at both ends of the lifting plate.

[0009] The cleaning mechanism is arranged on the upper machine head. The cleaning mechanism includes a connecting plate slidably mounted on the upper machine head in the vertical direction, and cleaning rollers are rotatably connected to both ends of the connecting plate. The cleaning rollers are in rolling cooperation with the inner sides of the wire guiding semi-tubes.

[0010] There are two clamping and feeding mechanisms, which are respectively located on the upper machine head and the lower machine head. The clamping and feeding mechanism includes a housing. The upper machine head and the lower machine head are detachably connected to the housing, and a driving wheel and a driven wheel are respectively slidably mounted at both ends inside the housing.

[0011] Among them, the two wire guiding semi-tubes are closed to each other when approaching, for guiding the wire. When the two wire guiding semi-tubes are away from each other, the cleaning rollers clean along the inner sides of the wire guiding semi-tubes.

[0012] As a preferred scheme of the automatic wire threading and guiding mechanism for wire cutting according to the present invention, wherein: the lifting plate is slidably connected to the upper machine head in the vertical direction. A first telescopic cylinder is fixedly connected to the upper machine head, and the output end of the first telescopic cylinder is fixedly connected to the lifting plate. First telescopic rods are fixedly connected to both ends of the lifting plate, and the wire guiding semi-tubes are fixedly connected to the output ends of the first telescopic rods.

[0013] As a preferred scheme of the automatic wire threading and guiding mechanism for wire cutting according to the present invention, wherein: a first sliding hole is formed in the lifting plate, and a first guide rod is fixedly connected to the inner wall of the upper machine head. The first sliding hole and the first guide rod are slidably matched in the vertical direction.

[0014] As a preferred scheme of the automatic wire threading and guiding mechanism for wire cutting according to the present invention, wherein: the connecting plate is slidably connected to the upper machine head in the vertical direction. A second telescopic cylinder is fixedly connected to the upper machine head, and the output end of the second telescopic cylinder is fixedly connected to the connecting plate.

[0015] As a preferred scheme of the automatic wire threading and guiding mechanism for wire cutting according to the present invention, wherein: a second sliding hole is formed in the connecting plate, and a second guide rod is fixedly connected to the inner wall of the upper machine head. The second sliding hole and the second guide rod are slidably matched in the vertical direction.

[0016] As a preferred embodiment of the automatic wire threading and guiding mechanism for wire cutting according to the present invention, the following components are included: The feeding mechanism further includes a second telescopic rod and a third telescopic rod respectively and fixedly installed at both ends of the housing. The output end of the second telescopic rod is fixedly connected to a first mounting plate, and a first motor is fixedly connected to the first mounting plate. The driving wheel is fixedly connected to the output end of the first motor. The output end of the third telescopic rod is fixedly connected to a second mounting plate, and the driven wheel is rotatably connected to the second mounting plate.

[0017] As a preferred embodiment of the automatic wire threading and guiding mechanism for wire cutting according to the present invention, the following components are included: A first sliding column is fixedly connected to the first mounting plate, and a first sliding block is fixedly connected to the housing. The first sliding block is slidably engaged with the first sliding column.

[0018] As a preferred embodiment of the automatic wire threading and guiding mechanism for wire cutting according to the present invention, the following components are included: A second sliding column is fixedly connected to the second mounting plate, and a second sliding block is fixedly connected to the housing. The second sliding block is slidably engaged with the second sliding column.

[0019] As a preferred embodiment of the automatic wire threading and guiding mechanism for wire cutting according to the present invention, the following components are included: A first recessed groove is formed on the driving wheel, and a second recessed groove is formed on the driven wheel. The first recessed groove and the second recessed groove are located in the same vertical plane.

[0020] As a preferred embodiment of the automatic wire threading and guiding mechanism for wire cutting according to the present invention, the following components are included: The cleaning roller includes a shaft portion rotatably connected to a connecting plate. A cleaning portion is slidably connected to the shaft portion. The inner side of the cleaning portion is rotatably engaged with the shaft portion. A retaining ring is provided at one end of the cleaning portion close to the connecting plate, and the retaining ring is fixedly connected to the shaft portion. A limiting ring is provided at one end of the cleaning portion far from the connecting plate, and the limiting ring is threadedly connected to the shaft portion. A second motor is provided at one end of the shaft portion close to the connecting plate, and the output end of the second motor is fixedly connected to one end of the shaft portion close to the connecting plate. The second motor is fixedly connected to the connecting plate. The outer side of the cleaning portion is arc-shaped and curved towards the outside.

[0021] The technical effects achieved by the present invention are:

[0022] The present invention adopts a design in which the complete wire guide tube is split into two wire guide half tubes. When the electrode wire moves during wire cutting processing, both wire guide half tubes move away from the electrode wire, so that when the electrode wire vibrates, it does not collide with the inner side of the wire guide half tubes, reducing the impact of the collision on the stability of the electrode wire. Moreover, the split design does not change the overall diameter size of the original complete wire guide tube. After the two wire guide half tubes are combined, they can still pass through the workpiece holes that the complete wire guide tube can pass through, facilitating the reduction of the collision between the electrode wire and the inner sides of the two wire guide half tubes without increasing the diameter size of the two wire guide half tubes;

[0023] The present invention adopts the design of a cleaning mechanism. The cleaning mechanism can clean the working fluid attached to the inner side of the wire guide half tube through a cleaning roller that moves up and down, reducing the situation where the electrode wire is hindered by this working fluid during wire threading and affecting the guiding accuracy. Moreover, due to the two wire guide half tubes with a split design, compared with the integral wire guide tube in the prior art, it avoids the situation where it is difficult for the cleaning tool to penetrate deep into the wire guide tube with a smaller aperture for cleaning, facilitating the cleaning of the working fluid during the time interval between wire removal and wire threading and improving the convenience;

[0024] The present invention adopts the design of a pinch-feed mechanism. The pinch-feed mechanism can clamp and move the electrode wire. It not only limits the electrode wire by clamping it, facilitating the electrode wire to be in a straight line in the vertical direction, so that when the two wire guide half tubes are combined, the electrode wire is located inside the two wire guide half tubes, reducing the situation where the inner wall clamps the electrode wire when the two wire guide half tubes are combined, but also moves the electrode wire by rotating the driving wheel, facilitating the electrode wire to pass through the workpiece holes during wire removal or wire threading and improving the convenience. Brief Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of the present invention;

[0026] Figure 2 is the cross-sectional schematic diagram of the upper head and the pinch-feed mechanism of the present invention;

[0027] Figure 3 is the cross-sectional schematic diagram of the upper head and the opening / closing mechanism of the present invention;

[0028] Figure 4 is the cross-sectional schematic diagram of the upper head and the cleaning mechanism of the present invention;

[0029] Figure 5 is the cross-sectional schematic diagram of the opening / closing mechanism and the cleaning mechanism of the present invention;

[0030] Figure 6 is the cross-sectional schematic diagram of the wire guide half tube and the cleaning roller of the present invention;

[0031] Figure 7 is the structural schematic diagram of the connecting plate and the cleaning roller of the present invention;

[0032] Figure 8 It is a schematic cross-sectional view of the pinch mechanism in the present invention.

[0033] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0034] 10. Upper machine head; 11. Lower machine head; 20. Opening and closing mechanism; 21. Lifting plate; 22. Half wire guide tube; 30. Cleaning mechanism; 31. Connecting plate; 32. Cleaning roller; 40. Pinch mechanism; 41. Housing; 42. Driving wheel; 43. Driven wheel; 51. First telescopic cylinder; 52. First telescopic rod; 53. First sliding hole; 54. First guide rod; 55. Second telescopic cylinder; 56. Second sliding hole; 57. Second guide rod; 61. Second telescopic rod; 62. Third telescopic rod; 63. First mounting plate; 64. First motor; 65. Second mounting plate; 66. First sliding column; 67. First slider; 68. Second sliding column; 69. Second slider; 71. Shaft part; 72. Cleaning part; 73. Retaining ring; 74. Limiting ring; 75. Second motor; 81. First recessed groove; 82. Second recessed groove. Specific embodiments

[0035] In order to make the purpose and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present invention, and does not strictly limit the scope of protection specifically claimed by the present invention.

[0036] As Figures 1 to 8 shown, it is the first embodiment of the present invention. This embodiment provides an automatic wire threading and guiding mechanism applied to wire cutting, including an upper machine head 10, and a lower machine head 11 is arranged below the upper machine head 10; an opening and closing mechanism 20, the opening and closing mechanism 20 is arranged on the upper machine head 10, the opening and closing mechanism 20 includes a lifting plate 21 slidably installed on the upper machine head 10 in the vertical direction, and half wire guide tubes 22 are slidably installed at both ends of the lifting plate 21; a cleaning mechanism 30, the cleaning mechanism 30 is arranged on the upper machine head 10, the cleaning mechanism 30 includes a connecting plate 31 slidably installed on the upper machine head 10 in the vertical direction, and cleaning rollers 32 are rotatably connected to both ends of the connecting plate 31, and the cleaning rollers 32 are in rolling cooperation with the inner sides of the half wire guide tubes 22; pinch mechanisms 40, there are two pinch mechanisms 40 and they are respectively located on the upper machine head 10 and the lower machine head 11, the pinch mechanism 40 includes a housing 41, both the upper machine head 10 and the lower machine head 11 are detachably connected to the housing 41, and a driving wheel 42 and a driven wheel 43 are respectively slidably installed at both ends inside the housing 41.

[0037] It should be noted that the upper head 10 and the lower head 11 are both prior arts. A first through hole is provided at the bottom of the upper head 10, and a second through hole is provided at the top of the lower head 11. The first through hole and the second through hole are vertically aligned. Both the upper head 10 and the lower head 11 are detachably connected to the housing 41 by bolts (not shown in the figure). An electrode wire is provided inside the upper head 10. The electrode wire is a prior art. The electrode wire vertically passes through the upper head 10, the lower head 11, and the wire feeding mechanism 40. Two wire guiding half tubes 22 are respectively located on both sides of the electrode wire. Each of the two wire guiding half tubes 22 is half of a complete wire guiding tube. The wire guiding tube is a prior art. The wire guiding tube is in the shape of a long cylinder and is used to guide the electrode wire through the hole in the workpiece. The two wire guiding half tubes 22 form a complete wire guiding tube when combined together, and the complete wire guiding tube is vertically aligned with the first through hole. The driving wheel 42 and the driven wheel 43 are respectively located on both sides of the electrode wire. A workpiece (not shown in the figure) is provided between the upper head 10 and the lower head 11. A hole (not shown in the figure) is provided in the workpiece. The first through hole and the second through hole are both vertically aligned with the hole.

[0038] It should also be noted that both the upper head 10 and the lower head 11 are fixedly installed on a wire cutting machine tool (not shown in the figure). The wire cutting machine tool is a prior art. An automatic wire threading and breaking mechanism (not shown in the figure) is provided on the wire cutting machine tool. The automatic wire threading and breaking mechanism is a prior art and includes a breaking component for breaking the electrode wire in a fusing or cutting manner, and also includes a traction component for pulling the electrode wire passing through the hole in the workpiece to the wire storage cylinder and fixing it on the wire storage cylinder. Details are not described here. In the initial state, the two wire guiding half tubes 22 are away from the electrode wire, and neither of the two wire guiding half tubes 22 extends downward outside the upper head 10. The electrode wire passes through the wire feeding mechanism 40 connected to the upper head 10, the upper head 10, the hole in the workpiece, the lower head 11, and the wire feeding mechanism 40 connected to the lower head 11. Both the driving wheel 42 and the driven wheel 43 are away from the electrode wire.

[0039] When the present invention is in use and wire removal is required, the driving wheels 42 and the driven wheels 43 in the two wire feeding mechanisms 40 approach each other and clamp the electrode wire to limit the electrode wire, so that the electrode wire is in a straight line in the vertical direction, facilitating the electrode wire to be exactly in the middle inside the two wire guiding half tubes 22 when the two wire guiding half tubes 22 are combined together, reducing the situation where the inner walls of the two wire guiding half tubes 22 clamp the electrode wire when they are combined together. After the two wire guiding half tubes 22 slide inwards along the lifting plate 21, the two wire guiding half tubes 22 approach the electrode wire from both sides of the electrode wire respectively, so that the two wire guiding half tubes 22 are combined together to form a complete wire guiding tube. At this time, the electrode wire is located inside the complete wire guiding tube, that is, inside the two wire guiding half tubes 22. The driving wheels 42 and the driven wheels 43 in the wire feeding mechanism 40 connected to the lower machine head 11 move away from the electrode wire and no longer limit the electrode wire. After the driving wheel 42 in the wire feeding mechanism 40 connected to the upper machine head 10 rotates, it drives the electrode wire to move upwards, so that the end of the electrode wire moves away from the lower machine head 11 and passes through the hole of the workpiece and moves into the interior of the upper machine head 10. At this time, the electrode wire is located inside the two wire guiding half tubes 22, thereby realizing the removal of the electrode wire from the workpiece. When wire threading is required, the lifting plate 21 moves downwards along the upper machine head 10, and the lifting plate 21 drives the wire guiding half tubes 22 to move downwards in the vertical direction, so that the wire guiding half tubes 22 extend out of the lower end of the upper machine head 10 and pass through the hole of the workpiece. The lifting plate 21 continues to move downwards, so that the lower end of the wire guiding half tubes 22 contacts the lower machine head 11, so that a channel is formed between the upper machine head 10 and the lower machine head 11 through the two wire guiding half tubes 22, and the channel is located inside the hole of the workpiece. After the driving wheel 42 in the wire feeding mechanism 40 connected to the upper machine head 10 rotates, it drives the electrode wire to move downwards, so that the electrode wire passes through the hole of the workpiece along the inside of the two wire guiding half tubes 22 and moves to the lower machine head 11. Since the two wire guiding half tubes 22 prevent the electrode wire from deviating outwards, it is convenient to guide the process of the electrode wire passing through the hole of the workpiece. The wire guiding half tubes 22 continue to move downwards into the wire feeding mechanism 40 connected to the lower machine head 11, and the driving wheels 42 and the driven wheels 43 approach each other and clamp the electrode wire, thereby realizing the threading of the electrode wire through the workpiece. The lifting plate 21 moves upwards along the upper machine head 10, so that the two wire guiding half tubes 22 move upwards and retract into the interior of the upper machine head 10. The two wire guiding half tubes 22 move away from the electrode wire, and the driving wheels 42 and the driven wheels 43 of the two wire feeding mechanisms 40 all move away from the electrode wire to achieve reset. Compared with the integral wire guiding tube in the prior art, since the complete wire guiding tube is split into two wire guiding half tubes 22, both wire guiding half tubes 22 are far away from the electrode wire during the wire cutting process, so that even if the electrode wire vibrates during movement, it will not collide with the inner sides of the two wire guiding half tubes 22. For the workpiece hole that the original complete wire guiding tube could pass through, after the two wire guiding half tubes 22 are combined together, the overall diameter size of the complete wire guiding tube remains unchanged and it can still pass through the workpiece hole.It is convenient to reduce the collision between the electrode wire and the inner sides of the two wire guide half tubes 22 without increasing the diameter size of the two wire guide half tubes 22, that is, while reducing the collision, it is also convenient for the two wire guide half tubes 22 to pass through the holes of the workpiece. When the two wire guide half tubes 22 move away from the electrode wire, the connecting plate 31 moves up and down along the upper machine head 10, and the connecting plate 31 drives the cleaning roller 32 to move up and down along the inner side of the wire guide half tube 22, so that the cleaning roller 32 rolls along the inner side of the wire guide half tube 22 and cleans the working fluid attached to the inner side of the wire guide half tube 22, reducing the situation that the electrode wire is hindered by these working fluids during wire threading and affecting the guiding accuracy. Compared with the integral wire guide tube in the prior art, since the complete wire guide tube is split into two wire guide half tubes 22, there is no need to extend the cleaning tool into the wire guide tube for cleaning, which is convenient for cleaning the working fluid during the time interval between wire removal and wire threading, improving the convenience. And after the wire feeding mechanism 40 works, it not only moves the electrode wire, facilitating the electrode wire to pass through the holes of the workpiece during wire removal and wire threading, but also limits the electrode wire, facilitating the electrode wire to be located inside the two wire guide half tubes 22 when the two wire guide half tubes 22 are put together.,

[0040] Referring to Figures 1 to 8 , this is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0041] As Figure 3 、 Figure 5 and Figure 6 shown, the lifting plate 21 is slidably connected to the upper machine head 10 in the vertical direction. A first telescopic cylinder 51 is fixedly connected to the upper machine head 10, the output end of the first telescopic cylinder 51 is fixedly connected to the lifting plate 21, and both ends of the lifting plate 21 are fixedly connected with first telescopic rods 52. The wire guide half tube 22 is fixedly connected to the output end of the first telescopic rod 52.

[0042] It should be noted that the first telescopic cylinder 51 is preferably a telescopic hydraulic cylinder in the present invention, and the first telescopic rod 52 is preferably an electric telescopic rod in the present invention.

[0043] According to the above structure, after the first telescopic cylinder 51 works, the output end drives the lifting plate 21 to move up and down along the upper machine head 10, and the lifting plate 21 drives the wire guide half tube 22 to move up and down in the vertical direction through the first telescopic rod 52. When the wire guide half tube 22 moves downward, it is convenient for the wire guide half tube 22 to pass through the workpiece. When the wire guide half tube 22 moves upward, it is convenient for the wire guide half tube 22 to retract into the upper machine head 10. After the first telescopic rod 52 works, the output end drives the wire guide half tube 22 to move in the horizontal direction. When the two wire guide half tubes 22 approach each other, it is convenient for the two wire guide half tubes 22 to be put together to form a complete wire guide tube. When the two wire guide half tubes 22 move away from each other, since the wire guide half tube 22 is far from the electrode wire, it is not only convenient to reduce the collision between the electrode wire and the wire guide half tube 22 when the electrode wire vibrates, but also convenient to reduce the collision between the cleaning roller 32 and the electrode wire when the cleaning roller 32 cleans the wire guide half tube 22.

[0044] As Figure 3 , Figure 5 and Figure 6 shown, a first sliding hole 53 is formed in the lifting plate 21, and a first guide rod 54 is fixedly connected to the inner wall of the upper machine head 10. The first sliding hole 53 and the first guide rod 54 are slidably matched in the vertical direction.

[0045] According to the above structure, the cooperation between the first guide rod 54 and the first sliding hole 53 makes the process of the lifting plate 21 sliding up and down along the upper machine head 10 more stable.

[0046] As Figure 4 and Figure 5 shown, the connecting plate 31 is slidably connected to the upper machine head 10 in the vertical direction, and a second telescopic cylinder 55 is fixedly connected to the upper machine head 10. The output end of the second telescopic cylinder 55 is fixedly connected to the connecting plate 31.

[0047] It should be noted that the second telescopic cylinder 55 is preferably a telescopic hydraulic cylinder in the present invention.

[0048] According to the above structure, after the second telescopic cylinder 55 works, the output end drives the connecting plate 31 to move up and down along the upper machine head 10, and the connecting plate 31 drives the cleaning roller 32 to move up and down in the vertical direction, facilitating the cleaning roller 32 to roll along the wire guiding semi-tube 22 and clean the working fluid attached to the inner side of the wire guiding semi-tube 22.

[0049] As Figure 4 , Figure 5 and Figure 7 shown, a second sliding hole 56 is formed in the connecting plate 31, and a second guide rod 57 is fixedly connected to the inner wall of the upper machine head 10. The second sliding hole 56 and the second guide rod 57 are slidably matched in the vertical direction.

[0050] According to the above structure, the cooperation between the second guide rod 57 and the second sliding hole 56 makes the process of the connecting plate 31 sliding along the upper machine head 10 more stable.

[0051] As Figure 8 shown, the pinch mechanism 40 further includes a second telescopic rod 61 and a third telescopic rod 62 respectively fixedly installed at both ends of the housing 41. The output end of the second telescopic rod 61 is fixedly connected to a first mounting plate 63, a first motor 64 is fixedly connected to the first mounting plate 63, the driving wheel 42 is fixedly connected to the output end of the first motor 64, the output end of the third telescopic rod 62 is fixedly connected to a second mounting plate 65, and the driven wheel 43 is rotatably connected to the second mounting plate 65.

[0052] It should be noted that the second telescopic rod 61 and the third telescopic rod 62 are preferably electric telescopic rods in the present invention.

[0053] According to the above structure, when it is necessary to clamp the electrode wire, after the second telescopic rod 61 works, the output end drives the driving wheel 42 to move inward through the second telescopic rod 61, and after the third telescopic rod 62 works, the output end drives the driven wheel 43 to move inward through the second mounting plate 65, so that the driving wheel 42 and the driven wheel 43 approach each other and clamp the electrode wire. When it is necessary to move the electrode wire, the output end of the first motor 64 drives the driving wheel 42 to rotate, so that the driving wheel 42 drives the electrode wire to move. At this time, the driven wheel 43 also rotates as the electrode wire moves. When it is not necessary to clamp the electrode wire, after the second telescopic rod 61 works, the output end drives the driving wheel 42 to move outward through the second telescopic rod 61, and after the third telescopic rod 62 works, the output end drives the driven wheel 43 to move outward through the second mounting plate 65, so that the driving wheel 42 and the driven wheel 43 move away from each other and no longer clamp the electrode wire.

[0054] As Figure 8 shown, a first sliding column 66 is fixedly connected to the first mounting plate 63, and a first sliding block 67 is fixedly connected to the housing 41. The first sliding block 67 is slidably engaged with the first sliding column 66.

[0055] It should be noted that a third through hole is formed inside the first sliding block 67, and the third through hole is slidably engaged with the first sliding column 66 in the horizontal direction.

[0056] According to the above structure, the cooperation between the first sliding column 66 and the first sliding block 67 makes the process of the first mounting plate 63 sliding along the housing 41 more stable.

[0057] As Figure 8 shown, a second sliding column 68 is fixedly connected to the second mounting plate 65, and a second sliding block 69 is fixedly connected to the housing 41. The second sliding block 69 is slidably engaged with the second sliding column 68.

[0058] It should be noted that a third through hole is formed inside the second sliding block 69, and the third through hole is slidably engaged with the second sliding column 68 in the horizontal direction.

[0059] According to the above structure, the cooperation between the second sliding column 68 and the second sliding block 69 makes the process of the second mounting plate 65 sliding along the housing 41 more stable.

[0060] As Figure 8 shown, a first concave groove 81 is formed on the driving wheel 42, and a second concave groove 82 is formed on the driven wheel 43. The first concave groove 81 and the second concave groove 82 are located in the same vertical plane.

[0061] It should be noted that the cross-sectional shapes of the first concave groove 81 and the second concave groove 82 are both "V" shaped, and the first concave groove 81 and the second concave groove 82 are both in fitting cooperation with the electrode wire.

[0062] According to the above structure, the first recessed groove 81 and the second recessed groove 82 are provided to limit the electrode wire, facilitating the electrode wire to be kept in a straight line in the vertical direction.

[0063] As Figure 7 shown, the cleaning roller 32 includes a shaft portion 71 rotatably connected to the connecting plate 31. A cleaning portion 72 is slidably connected to the shaft portion 71. The inner side of the cleaning portion 72 is rotatably engaged with the shaft portion 71. A retaining ring 73 is provided at one end of the cleaning portion 72 close to the connecting plate 31. The retaining ring 73 is fixedly connected to the shaft portion 71. A limiting ring 74 is provided at one end of the cleaning portion 72 away from the connecting plate 31. The limiting ring 74 is threadedly connected to the shaft portion 71. A second motor 75 is provided at one end of the shaft portion 71 close to the connecting plate 31. The output end of the second motor 75 is fixedly connected to the end of the shaft portion 71 close to the connecting plate 31. The second motor 75 is fixedly connected to the connecting plate 31. The outer side of the cleaning portion 72 is arc-shaped and is bent outward.

[0064] It should be noted that the inner side of the limiting ring 74 is provided with internal threads, and the outer side of the shaft portion 71 close to the limiting ring 74 is provided with external threads. The internal threads are in threaded engagement with the external threads. The cleaning portion 72 is made of a deformable water-absorbing material, and is preferably a sponge sleeve in the present invention.

[0065] According to the above structure, during the process that the connecting plate 31 drives the cleaning roller 32 to move along the wire guiding semi-tube 22, the cleaning roller 32 rolls along the inner side of the wire guiding semi-tube 22, so that the shaft portion 71 and the cleaning portion 72 roll along the inner side of the wire guiding semi-tube 22. At this time, the shaft portion 71 and the cleaning portion 72 are rotated passively along the connecting plate 31. When it is necessary to actively rotate the shaft portion 71 and the cleaning portion 72, after the second motor 75 works, the output end drives the shaft portion 71 and the cleaning portion 72 to rotate, so that the shaft portion 71 and the cleaning portion 72 actively roll along the inner side of the wire guiding semi-tube 22, facilitating the cleaning of the working fluid attached to the inner side of the wire guiding semi-tube 22. And the retaining ring 73 and the limiting ring 74 limit the cleaning portion 72 at both ends of the cleaning portion 72, preventing the cleaning portion 72 from being separated from the shaft portion 71. And since the limiting ring 74 is threadedly connected to the shaft portion 71, it is convenient to disassemble and assemble the cleaning portion 72 by disassembling and assembling the limiting ring 74 and the shaft portion 71, facilitating the replacement of the cleaning portion 72. And the cleaning portion 72 with an arc-shaped outer side is convenient for the outer side of the cleaning portion 72 to fit with the inner side of the wire guiding semi-tube 22, improving the contact between the cleaning portion 72 and the inner side of the wire guiding semi-tube 22, and facilitating the cleaning portion 72 to clean the working fluid attached to the inner side of the wire guiding semi-tube 22.

[0066] The working principle of the present invention is as follows: Two wire guide half-tubes 22 approach each other and combine to form a complete wire guide tube. Compared with the integral wire guide tube in the prior art, there is no need to change the diameter size of the wire guide tube, which facilitates the wire guide tube to pass through the holes of the workpiece. After the two wire guide half-tubes 22 move away from each other, they also move away from the electrode wire, avoiding the situation where the electrode wire collides with the inner wall of the wire guide half-tube 22 when the electrode wire vibrates. Thus, without increasing the diameter size of the two wire guide half-tubes 22, the situation where the electrode wire collides with the inner sides of the two wire guide half-tubes 22 is reduced. And after the two wire guide half-tubes 22 move away from each other, the cleaning roller 32 of the cleaning mechanism 30 cleans the working fluid adhering to the inner sides of the wire guide half-tubes 22, reducing the situation where the electrode wire is hindered by these working fluids during wire threading and affecting the guiding accuracy. Compared with the prior art, it avoids the situation where it is difficult for the cleaning tool to reach into the integral wire guide tube for cleaning, improving the convenience. And after the wire feeding mechanism 40 works, it clamps the electrode wire, making the electrode wire keep a vertical state, which is convenient for the electrode wire to be located inside the two wire guide half-tubes 22 after the two wire guide half-tubes 22 are combined together.

[0067] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. An automatic wire threading and guiding mechanism applied to wire cutting, characterized in that, Including: Upper head (10), a lower head (11) is arranged below the upper head (10); Opening and closing mechanism (20), the opening and closing mechanism (20) is arranged on the upper head (10), the opening and closing mechanism (20) includes a lifting plate (21) slidably installed on the upper head (10) in the vertical direction, and wire guiding semi-tubes (22) are slidably installed at both ends of the lifting plate (21); Cleaning mechanism (30), the cleaning mechanism (30) is arranged on the upper head (10), the cleaning mechanism (30) includes a connecting plate (31) slidably installed on the upper head (10) in the vertical direction, and cleaning rollers (32) are rotatably connected at both ends of the connecting plate (31), and the cleaning rollers (32) are in rolling cooperation with the inner sides of the wire guiding semi-tubes (22); Pinch and feed mechanism (40), there are two pinch and feed mechanisms (40) which are respectively located on the upper head (10) and the lower head (11), the pinch and feed mechanism (40) includes a housing (41), the upper head (10) and the lower head (11) are detachably connected to the housing (41), and a driving wheel (42) and a driven wheel (43) are respectively slidably installed at both ends inside the housing (41); Wherein, the two wire guiding semi-tubes (22) are closed to each other when approaching for wire guiding, and when the two wire guiding semi-tubes (22) are far away from each other, the cleaning rollers (32) clean along the inner sides of the wire guiding semi-tubes (22); The lifting plate (21) is slidably connected to the upper head (10) in the vertical direction, a first telescopic cylinder (51) is fixedly connected to the upper head (10), the output end of the first telescopic cylinder (51) is fixedly connected to the lifting plate (21), first telescopic rods (52) are fixedly connected to both ends of the lifting plate (21), and the wire guiding semi-tubes (22) are fixedly connected to the output ends of the first telescopic rods (52); The pinch and feed mechanism (40) further includes a second telescopic rod (61) and a third telescopic rod (62) respectively fixedly installed at both ends of the housing (41), the output end of the second telescopic rod (61) is fixedly connected to a first mounting plate (63), a first motor (64) is fixedly connected to the first mounting plate (63), the driving wheel (42) is fixedly connected to the output end of the first motor (64), the output end of the third telescopic rod (62) is fixedly connected to a second mounting plate (65), and the driven wheel (43) is rotatably connected to the second mounting plate (65); A first sliding column (66) is fixedly connected to the first mounting plate (63), a first sliding block (67) is fixedly connected to the housing (41), and the first sliding block (67) is slidably matched with the first sliding column (66); The cleaning roller (32) includes a shaft portion (71) rotatably connected to a connecting plate (31). A cleaning portion (72) is slidably connected to the shaft portion (71). The inner side of the cleaning portion (72) is rotationally engaged with the shaft portion (71). A retaining ring (73) is provided at one end of the cleaning portion (72) close to the connecting plate (31), and the retaining ring (73) is fixedly connected to the shaft portion (71). A limiting ring (74) is provided at one end of the cleaning portion (72) away from the connecting plate (31), and the limiting ring (74) is threadedly connected to the shaft portion (71). A second motor (75) is provided at one end of the shaft portion (71) close to the connecting plate (31), and the output end of the second motor (75) is fixedly connected to one end of the shaft portion (71) close to the connecting plate (31). The second motor (75) is fixedly connected to the connecting plate (31). The outer side of the cleaning portion (72) is arc-shaped and is curved towards the outside.

2. The automatic wire threading and guiding mechanism for wire cutting according to claim 1, characterized in that: A first sliding hole (53) is formed in the lifting plate (21), and a first guide rod (54) is fixedly connected to the inner wall of the upper machine head (10). The first sliding hole (53) and the first guide rod (54) are slidably engaged in the vertical direction.

3. The automatic wire threading and guiding mechanism applied to wire cutting according to claim 1, characterized in that: The connecting plate (31) is slidably connected to the upper machine head (10) in the vertical direction. A second telescopic cylinder (55) is fixedly connected to the upper machine head (10), and the output end of the second telescopic cylinder (55) is fixedly connected to the connecting plate (31).

4. The automatic wire threading and guiding mechanism for wire cutting according to claim 1, characterized in that: A second sliding hole (56) is formed in the connecting plate (31), and a second guide rod (57) is fixedly connected to the inner wall of the upper machine head (10). The second sliding hole (56) and the second guide rod (57) are slidably engaged in the vertical direction.

5. The automatic wire threading and guiding mechanism for wire cutting according to claim 1, characterized in that: A second sliding column (68) is fixedly connected to the second mounting plate (65), and a second sliding block (69) is fixedly connected to the housing (41). The second sliding block (69) is slidably engaged with the second sliding column (68).

6. The automatic wire threading and guiding mechanism applied to wire cutting according to claim 1, characterized in that: A first concave groove (81) is formed in the driving wheel (42), and a second concave groove (82) is formed in the driven wheel (43). The first concave groove (81) and the second concave groove (82) are located in the same vertical plane.

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