Wire threading structure with replaceable wire guide tube

Abstract

The utility model belongs to the technical field of linear cutting, and particularly relates to a wire threading structure with a replaceable wire guide tube, which comprises a lifting mechanism, a mounting rack, a wire feeding mechanism and the wire guide tube, the lifting end of the lifting mechanism is connected with the mounting rack, and the wire feeding mechanism is arranged on the mounting rack; the wire feeding mechanism comprises a guide sleeve, a connecting sleeve and a pinch roller assembly, and the pinch roller assembly is arranged on the mounting frame; a mounting hole and a mounting cavity are formed in the mounting frame, and the guide sleeve is arranged in the mounting hole; the upper end of the guide sleeve extends to the bottom end of the pinch roller assembly, and the lower end of the guide sleeve is provided with a guide part extending to the mounting cavity; the connecting sleeve is arranged in the mounting cavity, a guide hole is formed in the upper end of the connecting sleeve, a connecting hole is formed in the lower end of the connecting sleeve and communicates with the guide hole, and a limiting surface is formed at the upper end of the connecting hole; the guide hole is sleeved on the guide part, and the guide wire tube detachably and replaceably extends into the connecting hole. And the guide wire pipes can be detached and replaced, so that the guide wire pipes with different lengths can be conveniently replaced, the device is suitable for workpieces with different surface heights, and various production requirements are met.

Description

Technical Field

[0001] This utility model belongs to the field of wire cutting technology, and in particular relates to a wire threading structure with a replaceable guide tube. Background Technology

[0002] A high-speed wire EDM machine uses an electrode wire that reciprocates at high speed. The working principle is as follows: the electrode wire passes through a pre-drilled hole in the workpiece and is driven by a guide wheel and wire drum to move back and forth alternately. The workpiece is mounted on a conductive worktable via an insulating plate. The conductive worktable moves in the X and Y coordinate directions of the horizontal plane according to a given control program, composing an arbitrary planar curve trajectory. A pulse power supply applies a pulse voltage to the electrode wire and the workpiece. The electrode wire is connected to the negative terminal of the pulse power supply, and the workpiece is connected to the positive terminal. When an electrical pulse arrives, a spark discharge is generated between the electrode wire and the workpiece. The temperature at the center of the discharge channel is instantly high, causing the workpiece metal to melt and even partially vaporize. The high temperature also causes partial vaporization of the working fluid between the electrode wire and the workpiece. This vaporized working fluid and metal vapor expand rapidly and instantaneously, exhibiting explosive characteristics. This thermal expansion and localized micro-explosion eject the molten and vaporized metal material, achieving electro-erosion cutting of the workpiece material. In the fast wire EDM production process, a wire guide tube is needed to guide the electrode wire, but most of the wire guide tubes used in existing cutting equipment have a fixed height and cannot be raised or lowered.

[0003] Chinese patent document CN217775807U discloses an automatic wire threading guide mechanism for a wire EDM machine, including a wire guide tube, a wire feeding and tension system arranged sequentially along the wire feeding direction, a wire feeding wheel for conveying the wire, a cutting mechanism, an upper head, a workpiece, a lower head, and a take-up wheel. The machine tool is equipped with a drive device for driving the wire guide tube to move towards the lower head. The upper head is equipped with an opening and closing eye mold for clamping the wire, and the wire guide tube passes through the upper head and the workpiece.

[0004] In the aforementioned patent document's technical solution, because the wire guide mechanism is fixedly set, if the workpiece surface is uneven or the height difference is large, the end of the wire guide tube will not contact the wire threading hole of the workpiece, making it difficult to align and thus impossible to thread the wire accurately in one go, increasing the difficulty of threading the wire and reducing production efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a wire threading structure with a replaceable wire guide tube, which solves the problem that the automatic wire threading mechanism of the existing wire EDM machine is fixedly set, but the workpiece surface is uneven, making it difficult for the wire guide tube of the wire threading mechanism to be accurately aligned with the wire threading hole of the workpiece, thus affecting the wire threading operation.

[0006] To achieve the above objectives, this utility model provides a wire threading structure with a replaceable guide tube, including a lifting mechanism, a mounting frame, a wire feeding mechanism, and a guide tube. The lifting end of the lifting mechanism is connected to the mounting frame, and the wire feeding mechanism is mounted on the mounting frame. The wire feeding mechanism includes a guide sleeve, a connecting sleeve, and a clamping roller assembly, which is mounted on the mounting frame. The mounting frame has a mounting hole and a mounting cavity, and the guide sleeve is located in the mounting hole. The upper end of the guide sleeve extends to the bottom end of the clamping roller assembly, and the lower end of the guide sleeve has a guide portion extending to the mounting cavity. The connecting sleeve is located in the mounting cavity, and the upper end of the connecting sleeve has a guide hole, and the lower end has a connecting hole. The connecting hole communicates with the guide hole, and the upper end of the connecting hole forms a limiting surface. The guide hole is fitted onto the guide portion, and the guide tube can be detachably and replaceably inserted into the connecting hole.

[0007] Furthermore, the upper end of the guide wire tube is provided with a tapered hole, and the larger end of the tapered hole extends to the end of the guide wire tube.

[0008] Furthermore, a limiting sleeve is provided at the lower end of the mounting cavity to limit the bottom end of the connecting sleeve, and the connecting sleeve is slidably disposed within the mounting cavity; a buffer spring is provided between the connecting sleeve and the top side wall of the mounting cavity to elastically support the connecting sleeve.

[0009] Furthermore, a limit switch extending into the mounting cavity is provided on one side of the mounting bracket to detect the distance the connecting sleeve rises, thereby controlling the stroke of the connecting sleeve.

[0010] Furthermore, a screw is provided on one side of the connecting sleeve, which is used to lock the guide wire tube; a clearance hole is provided on one side of the mounting bracket, which is used to avoid the screw or to provide a tool for adjusting the screw.

[0011] Furthermore, the wall of the connecting hole is provided with multiple elastic grooves, which cause the lower end of the connecting sleeve to form an elastic clamping arm.

[0012] Furthermore, the lower end of the mounting cavity is also provided with an eye mold, the eye mold including an eye mold sleeve and a wear-resistant nozzle, the wear-resistant nozzle being located at the bottom end of the eye mold sleeve, the guide wire passing through the eye mold sleeve and extending out of the wear-resistant nozzle; a water inlet is provided on one side of the mounting cavity, a concave cavity is provided on the outer side of the eye mold sleeve, the concave cavity communicating with the water inlet, the eye mold sleeve also having multiple through holes, the two ends of the through holes communicating with the concave cavity and the wear-resistant nozzle.

[0013] Furthermore, the clamping roller assembly includes two rollers, a rotary drive, a moving block, and a telescopic component. The two rollers are located on both sides above the guide sleeve. The telescopic component is located on the mounting bracket and connected to the moving block. The rotary drive is located on the moving block and connected to one of the rollers, used to drive the roller away from or closer to the other roller.

[0014] Furthermore, each of the two rollers is provided with a gear on one side, and the two gears are meshed together.

[0015] The replacement guide tube wire threading structure provided in this utility model embodiment has at least the following technical effects:

[0016] The lifting end of the lifting mechanism is connected to the mounting frame. The wire feeding mechanism is mounted on the mounting frame, and the top end of the wire guide tube extends into the connecting sleeve inside the mounting frame. The lifting mechanism drives the mounting frame to move downward, aligning the wire guide tube with the wire threading hole of the workpiece. The clamping roller assembly of the wire feeding mechanism is located at the upper end of the guide sleeve, which is situated within the mounting hole of the mounting frame. The lower end of the guide sleeve extends into the mounting cavity. The connecting sleeve is located in the mounting cavity, with its upper guide hole fitted into the guide portion. The lower end has a connecting hole communicating with the guide hole. A limiting surface is formed at the upper end of the connecting hole to limit the wire guide tube extending into the connecting hole, thus creating a connected conveying channel between the guide sleeve, connecting sleeve, and wire guide tube. Therefore, after the wire guide tube is aligned with the wire threading hole, the clamping roller assembly stably feeds the electrode wire through the guide sleeve, connecting sleeve, wire guide tube, and the wire threading hole of the workpiece.

[0017] Because the guide tube can be detachably inserted into the connecting hole of the connecting sleeve, it is convenient to replace guide tubes of different lengths to adapt to workpieces with different surface heights and meet various production needs; when the guide tube is worn, it can be quickly disassembled and replaced, reducing equipment downtime and saving maintenance costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the threading structure of the replaceable guide tube provided in an embodiment of this utility model.

[0020] Figure 2 A perspective view of the wire feeding mechanism and mounting frame of the replaceable wire guide tube wire threading structure provided in the embodiment of this utility model.

[0021] Figure 3 Another perspective view of the wire feeding mechanism and mounting frame of the replaceable wire guide tube wire threading structure provided in the embodiment of this utility model.

[0022] Figure 4 A cross-sectional view of the wire feeding mechanism and mounting bracket of the replaceable wire guide tube wire threading structure provided in this embodiment of the utility model.

[0023] Figure 5 The wire threading structure with replaceable guide tube provided in this embodiment of the utility model Figure 4 A magnified view of A in the middle.

[0024] Figure 6 A structural diagram of the guide sleeve for the wire threading structure of the replaceable guide tube provided in this embodiment of the utility model.

[0025] Figure 7 A structural diagram of the connecting sleeve of the replaceable guide tube wire threading structure provided in this embodiment of the utility model.

[0026] Figure 8 This is a cross-sectional view of a first embodiment of the connecting sleeve of the wire threading structure for the replaceable guide tube provided in this utility model.

[0027] Figure 9 A cross-sectional view of a second embodiment of the connecting sleeve with a replaceable guide tube wire threading structure provided in this utility model.

[0028] Figure 10 A cross-sectional view of the mounting bracket for the wire threading structure with replaceable guide tube provided in an embodiment of this utility model.

[0029] In the diagram, 100 represents the lifting mechanism.

[0030] 200. Wire feeding mechanism; 210. Guide sleeve; 211. Guide part; 220. Connecting sleeve; 221. Guide hole; 222. Connecting hole; 223. Screw; 224. Elastic groove; 230. Clamping roller assembly; 231. Roller; 232. Rotary drive component; 233. Moving block; 234. Telescopic component; 235. Gear.

[0031] 300, mounting bracket; 310, mounting hole; 320, mounting cavity; 321, limit sleeve; 330, buffer spring; 340, limit switch; 350, clearance hole; 360, eye mold; 361, eye mold sleeve; 362, wear-resistant sleeve; 363, recessed cavity; 370, water inlet.

[0032] 400, guide wire tube; 410, tapered hole. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0034] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0037] In one embodiment of the wire threading structure of the replaceable guide tube of this utility model, please refer to... Figures 1 to 10The replaceable wire guide tube threading structure includes a lifting mechanism 100, a mounting frame 300, a wire feeding mechanism 200, and a wire guide tube 400. The lifting end of the lifting mechanism 100 is connected to the mounting frame 300, and the wire feeding mechanism 200 is mounted on the mounting frame 300. The wire feeding mechanism 200 includes a guide sleeve 210, a connecting sleeve 220, and a clamping roller assembly 230, which is mounted on the mounting frame 300. The mounting frame 300 has a mounting hole 310 and a mounting cavity 320, and the guide sleeve 210 is located in the mounting hole 310. The upper end of the guide sleeve 210 extends to the bottom end of the clamping roller assembly 230, and the lower end of the guide sleeve 210 has a guide portion 211 extending to the mounting cavity 320. The connecting sleeve 220 is disposed within the mounting cavity 320. The upper end of the connecting sleeve 220 is provided with a guide hole 221, and the lower end is provided with a connecting hole 222. The connecting hole 222 communicates with the guide hole 221, and the upper end of the connecting hole 222 forms a limiting surface. The guide hole 221 is fitted onto the guide part 211, and the guide wire tube 400 can be detachably and replaceably inserted into the connecting hole 222.

[0038] Specifically, the lifting end of the lifting mechanism 100 is connected to the mounting frame 300, the wire feeding mechanism 200 is mounted on the mounting frame 300, and the top end of the wire guide tube 400 extends into the connecting sleeve 220 inside the mounting frame. The lifting mechanism 100 drives the mounting frame 300 to move downward so that the wire guide tube 400 is aligned with the wire threading hole of the workpiece. Because the clamping roller assembly 230 of the wire feeding mechanism is located at the upper end of the guide sleeve 210, the guide sleeve 210 is located in the mounting hole 310 of the mounting frame, and the lower end is provided with a guide portion 211 extending into the mounting cavity. The connecting sleeve 220 is located in the mounting cavity 320, and the upper end of the guide hole 221 is fitted onto the guide portion 211. The lower end is provided with a connecting hole 222 communicating with the guide hole 221. The upper end of the connecting hole 222 forms a limiting surface to limit the wire guide tube 400 extending into the connecting hole 222, so that the guide sleeve 210, the connecting sleeve 220 and the wire guide tube 400 together form a connected conveying channel. Therefore, after the wire guide tube 400 is aligned with the wire threading hole, the clamping roller assembly 230 delivers the electrode wire to pass stably through the guide sleeve 210, the connecting sleeve 220, the wire guide tube 400 and the wire threading hole of the workpiece.

[0039] Since the guide tube 400 can be detachably inserted into the connecting hole 222 of the connecting sleeve, it is convenient to replace the guide tube 400 of different lengths to adapt to workpieces with different surface heights and meet various production needs; when the guide tube 400 is worn, it can be quickly disassembled and replaced, reducing equipment downtime and saving maintenance costs.

[0040] Furthermore, the upper end of the guide wire tube 400 is provided with a tapered hole 410, the larger end of which extends to the end of the guide wire tube 400. Specifically, the tapered hole 410 guides the electrode wire to enter the guide wire tube 400 through the guide hole 221 of the connecting sleeve.

[0041] Furthermore, a limiting sleeve 321 is provided at the lower end of the mounting cavity 320 to limit the bottom end of the connecting sleeve 220, which is slidably disposed within the mounting cavity 320. A buffer spring 330 is provided between the connecting sleeve 220 and the top side wall of the mounting cavity 320 to elastically support the connecting sleeve 220. Specifically, the limiting sleeve 321 prevents the connecting sleeve 220 from detaching from the mounting cavity 320 when the guide tube 400 separates from it, thus avoiding interference with the subsequent replacement and installation of the guide tube 400. The lifting mechanism 100 moves the mounting frame 300 and the guide tube 400 up and down, causing the guide tube 400 to collide with the uneven workpiece surface. The buffer spring 330 elastically supports the connecting sleeve 220, reducing the impact of collisions between the mounting frame 300, the connecting sleeve 220, and the guide tube 400.

[0042] Furthermore, a limit switch 340 extending into the mounting cavity 320 is provided on one side of the mounting bracket 300 to detect the distance the connecting sleeve 220 rises, thereby controlling the stroke of the connecting sleeve 220. Specifically, the limit switch 340 detects and controls the rising stroke of the connecting sleeve 220, helping to reduce the impact between the rising connecting sleeve 220 and the mounting bracket 300 and the guide sleeve 210, further improving the buffering effect; and after detecting that the rising of the connecting sleeve 220 is stable, it determines that the wire guide tube 400 has made contact and aligned with the workpiece, and the clamping roller assembly 230 delivers the electrode wire.

[0043] Furthermore, a screw 223 is provided on one side of the connecting sleeve 220 for locking the guide wire tube 400. A clearance hole 350 is provided on one side of the mounting bracket to allow the screw 223 or tools for adjusting the screw 223 to pass through. Specifically, the screw 223 securely and detachably connects the guide wire tube 400 to the connecting sleeve 220. The clearance hole 350 facilitates adjustment of the tightness of the guide wire tube 400 via the screw 223.

[0044] Furthermore, the wall of the connecting hole 222 is provided with multiple elastic grooves 224, which form an elastic clamping arm at the lower end of the connecting sleeve 220. Specifically, the elastic clamping arm formed by the multiple elastic grooves 224 has radial elastic deformation capability, and the elastic clamping arm can adapt to guide wire tubes 400 of different diameters and stably and uniformly clamp and fix the guide wire tube 400.

[0045] Furthermore, the lower end of the mounting cavity 320 is also provided with an eye mold 360, which includes an eye mold sleeve 361 and a wear-resistant nozzle 362. The wear-resistant nozzle 362 is located at the bottom end of the eye mold sleeve 361, and the lower end of the guide wire tube 400 passes through the eye mold sleeve 361 and extends out of the wear-resistant nozzle 362. A water inlet 370 is provided on one side of the mounting cavity 320, and a recess 363 is provided on the outer side of the eye mold sleeve 361. The recess 363 is connected to the water inlet 370. The eye mold sleeve 361 is also provided with multiple through holes, the two ends of which are connected to the recess 363 and the wear-resistant nozzle 362. Specifically, when the electrode wire cuts the workpiece, water or coolant enters the recess 363 from the water inlet 370, and then flows through the through holes, the wear-resistant nozzle 32, and the contact point between the electrode wire and the workpiece, effectively controlling the processing temperature.

[0046] Furthermore, the clamping roller assembly 230 includes two rollers 231, a rotary drive 232, a moving block 233, and a telescopic member 234. The two rollers 231 are located on both sides above the guide sleeve 210. The telescopic member 234 is located on the mounting bracket 300 and is connected to the moving block 233. The rotary drive 232 is located on the moving block 233 and is connected to one roller 231, used to drive the roller 231 away from or closer to the other roller 231. Specifically, the telescopic member 234 drives the moving block 233 to move closer, reducing the distance between the two rollers 231 for clamping the electrode wire; then the rotary drive 232 drives the roller 231 to rotate, conveying the electrode wire.

[0047] Furthermore, each of the two rollers 231 is provided with a gear 235 on one side, and the two gears 235 are meshed together. Specifically, because the two gears 235 are meshed, when the rotary drive 232 drives one roller 231 to rotate, the gear 235 drives the other roller 231 to rotate in the opposite direction, thereby accelerating the delivery of the electrode wire.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wire threading structure with a replaceable guide tube, characterized in that, The device includes a lifting mechanism, a mounting frame, a wire feeding mechanism, and a wire guide tube. The lifting end of the lifting mechanism is connected to the mounting frame, and the wire feeding mechanism is mounted on the mounting frame. The wire feeding mechanism includes a guide sleeve, a connecting sleeve, and a clamping roller assembly, which is mounted on the mounting frame. The mounting frame has a mounting hole and a mounting cavity, and the guide sleeve is located in the mounting hole. The upper end of the guide sleeve extends to the bottom end of the clamping roller assembly, and the lower end of the guide sleeve has a guide portion extending to the mounting cavity. The connecting sleeve is located in the mounting cavity, and the upper end of the connecting sleeve has a guide hole, and the lower end has a connecting hole. The connecting hole communicates with the guide hole, and the upper end of the connecting hole forms a limiting surface. The guide hole fits onto the guide portion, and the wire guide tube can be detachably and replaceably inserted into the connecting hole.

2. The wire threading structure for the replaceable guide tube according to claim 1, characterized in that: The upper end of the guide wire tube is provided with a tapered hole, and the larger end of the tapered hole extends to the end of the guide wire tube.

3. The wire threading structure for the replaceable guide tube according to claim 1, characterized in that: The lower end of the mounting cavity is also provided with a limiting sleeve to limit the bottom end of the connecting sleeve, and the connecting sleeve is slidably disposed in the mounting cavity; a buffer spring is provided between the connecting sleeve and the top side wall of the mounting cavity to elastically support the connecting sleeve.

4. The wire threading structure for the replaceable guide tube according to claim 3, characterized in that: One side of the mounting bracket is provided with a limit switch that extends into the mounting cavity to detect the distance the connecting sleeve rises, thereby controlling the stroke of the connecting sleeve.

5. The wire threading structure of the replaceable guide tube according to any one of claims 1 to 4, characterized in that: A screw is provided on one side of the connecting sleeve, which is used to lock the guide wire tube; a clearance hole is provided on one side of the mounting bracket, which is used to avoid the screw or a tool for adjusting the screw.

6. The wire threading structure of the replaceable guide tube according to any one of claims 1 to 4, characterized in that: The wall of the connecting hole is provided with multiple elastic grooves, which make the lower end of the connecting sleeve form an elastic clamping arm.

7. The wire threading structure of the replaceable guide tube according to any one of claims 1 to 4, characterized in that: The lower end of the mounting cavity is also provided with an eye mold, which includes an eye mold sleeve and a wear-resistant nozzle. The wear-resistant nozzle is located at the bottom end of the eye mold sleeve. The guide wire passes through the eye mold sleeve and extends out of the wear-resistant nozzle. A water inlet is provided on one side of the mounting cavity. A concave cavity is provided on the outer side of the eye mold sleeve. The concave cavity is connected to the water inlet. The eye mold sleeve is also provided with multiple through holes. The two ends of the through holes are connected to the concave cavity and the wear-resistant nozzle.

8. The wire threading structure for the replaceable guide tube according to claim 1, characterized in that: The clamping roller assembly includes two rollers, a rotary drive, a moving block, and a telescopic component. The two rollers are located on both sides above the guide sleeve. The telescopic component is located on the mounting frame and is connected to the moving block. The rotary drive is located on the moving block and is connected to one of the rollers, used to drive the roller away from or closer to the other roller.

9. The wire threading structure for the replaceable guide tube according to claim 8, characterized in that: Both rollers are provided with gears on one side, and the two gears are meshed together.

Images