Electrode wire guide mechanism convenient to disassemble and assemble

Abstract

The utility model discloses an electrode wire guide mechanism convenient to disassemble and assemble, which comprises a guide assembly and an installation arm for installing the guide assembly, and the installation arm is provided with an assembly hole for installing the guide assembly. The guide assembly comprises a rotating shaft, a guide wheel fixedly arranged in the middle of the rotating shaft, two bearings arranged at the two ends of the rotating shaft and two bearing seats for installing the bearings, and the outer diameter of the guide wheel and the outer diameter of at least one bearing seat are both smaller than the inner diameter of the assembly hole. Therefore, the guide assembly can be detached and taken out from the mounting arm through the assembly hole. According to the technical scheme, the guide assembly is independently disassembled and assembled, and the disassembling and assembling flexibility and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of wire cutting equipment technology, and in particular to an electrode wire guiding mechanism that is easy to assemble and disassemble. Background Technology

[0002] CNC wire EDM machines are generally classified into three categories: fast wire EDM machines, medium wire EDM machines, and slow wire EDM machines. Taking a fast wire EDM machine as an example, the electrode wire performs high-speed reciprocating motion, with a wire feed speed of 8m / s to 10m / s. Its 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, synthesizing 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 is received, a spark discharge is generated between the electrode wire and the workpiece. The temperature at the center of the discharge channel can instantly reach over 10,000°C. This high temperature melts the workpiece metal, and even causes a small amount to 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 undergo rapid thermal expansion and exhibit explosive characteristics. This thermal expansion and localized micro-explosion eject the molten and vaporized metal material, thus achieving electro-erosion cutting of the workpiece.

[0003] The existing wire EDM machine tools use guide mechanisms with complex assembly structures, which are prone to interference between components. When a component malfunctions, disassembly and maintenance are inconvenient, severely impacting production efficiency. The applicant's prior application (Publication No.: CN222344415U) discloses a wire threading mechanism that is easy to disassemble and assemble. By setting a first mounting slot and a second mounting slot, the steering mechanism and clamping mechanism can be detachably connected, respectively. The installation of the two mechanisms does not interfere with each other. When one mechanism malfunctions, only the corresponding mechanism needs to be disassembled for maintenance, significantly improving machine maintenance efficiency and further enhancing production efficiency. While the above structure allows for independent disassembly and assembly of the steering mechanism and clamping mechanism, the steering mechanism includes a steering component (corresponding to the guide component in this application) and a clamping plate. When maintenance requires removing the steering component, the clamping plate must also be removed simultaneously, making the disassembly and assembly efficiency still not ideal. Utility Model Content

[0004] The main purpose of this utility model is to provide an electrode wire guiding mechanism that is easy to disassemble and assemble, thereby solving the problem of independent disassembly and assembly of the guiding components and improving disassembly and assembly efficiency.

[0005] To achieve the above objectives, one aspect of this utility model provides an electrode wire guiding mechanism that is easy to assemble and disassemble, including a guiding assembly and a mounting arm for mounting the guiding assembly. The mounting arm is provided with an assembly hole for mounting the guiding assembly. The guiding assembly includes a rotating shaft, a guide wheel fixed in the middle of the rotating shaft, two bearings at both ends of the rotating shaft, and two bearing seats for mounting the bearings. The outer diameter of the guide wheel and at least one of the bearing seats is smaller than the inner diameter of the assembly hole, so that the guiding assembly can be disassembled and removed from the mounting arm through the assembly hole.

[0006] Furthermore, a limiting unit is provided at the assembly hole so that the guide component can be in a preset position after being assembled into the assembly hole.

[0007] Furthermore, the limiting unit is a limiting flange provided on the inner wall of the assembly hole, the outer diameter of one bearing seat is smaller than the inner diameter of the limiting flange, and the outer diameter of the other bearing seat is larger than the inner diameter of the limiting flange.

[0008] Furthermore, the bearing housing with a smaller outer diameter is movably fitted with a positioning sleeve, the outer diameter of which is adapted to the inner diameter of the assembly hole.

[0009] Furthermore, the mounting arm includes a fastening bolt, and the mounting arm is provided with a fastening hole communicating with the assembly hole. The fastening bolt can penetrate the fastening hole and act on the outer wall of the bearing housing to achieve the limiting and fixing of the guide assembly.

[0010] Furthermore, the bearing housing is threadedly connected to an end cap.

[0011] Furthermore, an insulating isolation layer is provided through both end faces of the bearing housing, and an electrical terminal is provided on the end face of the bearing housing inside the isolation layer. The electrical terminal is electrically connected to the rotating shaft through a carbon brush, and the rotating shaft is electrically connected to the guide wheel.

[0012] Furthermore, it includes a clamping plate adapted to the guide wheel, the inner side of the clamping plate is provided with an arc-shaped turning surface adapted to the outer periphery of the guide wheel, the outer periphery of the guide wheel and the turning surface are clamped together to form a turning channel for passing through the electrode wire, and the electrode wire achieves a preset angle of turning after passing through the turning channel.

[0013] Preferably, the clamping plate is L-shaped.

[0014] Furthermore, the mounting arm is provided with an assembly groove for mounting the clamping plate. The assembly groove is recessed at the end of the mounting arm, and the assembly hole penetrates through both end faces of the mounting arm and communicates with the assembly groove.

[0015] Compared with the prior art, the present invention has the following advantages: the outer diameter of the guide wheel and at least one bearing seat is smaller than the inner diameter of the assembly hole, so that the guide assembly can be disassembled and removed from the mounting arm through the assembly hole, realizing the individual disassembly and assembly of the guide assembly and improving the flexibility and efficiency of disassembly and assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 the structures shown in these drawings without creative effort.

[0017] Figure 1 This is an exploded view of the overall structure of Embodiment 1 of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the guide assembly and clamping plate in Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the wire threading of the guide assembly and clamping plate in Embodiment 1 of this utility model;

[0020] Figure 4 This is a schematic diagram of the clamping plate structure of Embodiment 1 of this utility model;

[0021] Explanation of reference numerals in the attached drawings: 100-Electrode wire; 1-Mounting arm; 2-Assembly hole; 3-Rotating shaft; 4-Guide wheel; 5-Bearing; 6-Bearing seat; 7-Limiting flange; 8-Positioning sleeve; 9-End cap; 10-Isolation layer; 11-Clamping plate; 12-Turn-around surface; 13-Assembly groove; 14-Power connection terminal. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0025] Example 1: Refer to Figures 1 to 4 This utility model proposes an electrode wire guiding mechanism that is easy to disassemble and assemble, including a guiding component and a mounting arm 1 for mounting the guiding component. The mounting arm 1 is provided with an assembly hole 2 for mounting the guiding component. The guiding component includes a rotating shaft 3, a guide wheel 4 fixed in the middle of the rotating shaft 3, two bearings 5 ​​located at both ends of the rotating shaft 3, and two bearing seats 6 for mounting the bearings 5. The outer diameter of the guide wheel 4 and at least one bearing seat 6 is smaller than the inner diameter of the assembly hole 2, so that the guiding component can be disassembled and removed from the mounting arm 1 through the assembly hole 2, realizing the individual disassembly and assembly of the guiding component and improving the flexibility and efficiency of disassembly and assembly.

[0026] Specifically, a limiting unit is provided at the assembly hole 2 to ensure that the guide component is in a preset position after being assembled into the assembly hole 2. In this embodiment, the limiting unit is a limiting flange 7 located on the inner wall of the assembly hole 2. The outer diameter of one bearing seat 6 is smaller than the inner diameter of the limiting flange 7, and the outer diameter of the other bearing seat 6 is larger than the inner diameter of the limiting flange 7. During assembly, the bearing seat 6 with the smaller outer diameter passes directly through the limiting flange 7, while the bearing seat 6 with the larger outer diameter is blocked by the limiting flange 7 and cannot pass through. That is, when it abuts against the limiting flange 7, it indicates that the position has been installed correctly, thus achieving a positioning function.

[0027] More specifically, a positioning sleeve 8 is movably fitted onto the bearing housing 6 with a smaller outer diameter. The outer diameter of the positioning sleeve 8 matches the inner diameter of the mounting hole 2. The smaller outer diameter of the bearing housing 6 facilitates its entry into the mounting hole 2. After installation, the positioning sleeve 8 is fitted to ensure its outer diameter matches the mounting hole 2, providing positioning and stabilization, resulting in a more stable installation. It also includes fastening bolts (not shown in the figure). The mounting arm 1 has fastening holes (not shown in the figure) that connect to the mounting hole 2. The fastening bolts penetrate the fastening holes and act on the outer wall of the bearing housing 6 to limit and fix the guide assembly. The fastening bolts can lock and fix the bearing housing 6, preventing its displacement. An end cap 9 is threadedly connected to the end of the bearing housing 6, further securing it. An insulating isolation layer 10 is provided on both end faces of the bearing housing 6 to provide insulation and achieve electrical insulation between the electrode wire 100 and the mounting arm 1. An electrical terminal 14 is provided on the end face of the bearing housing 6 inside the isolation layer 10. The electrical terminal 14 is electrically connected to the rotating shaft 3 via a carbon brush, and the rotating shaft 3 is electrically connected to the guide wheel 4. During use, the electrode wire 100 must be wound around the guide wheel 4. Current is transmitted to the guide wheel 4 via the electrical terminal 14, carbon brush, and rotating shaft 3, and then to the electrode wire 100. Therefore, the current is directly transmitted to the electrode wire 100 through the guide wheel 4, avoiding the wear problems that occur when using a conductive block. This also reduces wear on the conductive block and the electrode wire 100, and prevents the electrode wire 100 from being broken, thus extending the service life of the electrode wire 100.

[0028] Furthermore, it also includes a clamping plate 11 adapted to the guide wheel 4. The clamping plate 11 is L-shaped, and the inner side of the clamping plate 11 is provided with an arc-shaped turning surface 12 adapted to the outer periphery of the guide wheel 4. The outer periphery of the guide wheel 4 and the turning surface 12 are clamped together to form a turning channel for passing through the electrode wire 100. After the electrode wire 100 passes through the turning channel, it achieves a preset angle of turning. The mounting arm 1 is provided with an assembly groove 13 for mounting the clamping plate 11. The assembly groove 13 is recessed at the end of the mounting arm 1, and the assembly hole 2 passes through both end faces of the mounting arm 1 and communicates with the assembly groove 13.

[0029] The working principle of this embodiment:

[0030] During assembly, insert one end of the bearing seat 6 with the smaller outer diameter into the assembly hole 2 until the inner side of the bearing seat 6 with the larger outer diameter abuts against the limiting flange 7. The bearing seats 6 on both sides are limited and fixed by the end cover 9, and then locked and fixed by the fastening bolts, so that the guide assembly and the mounting arm 1 are installed and fixed. During disassembly, loosen the fastening bolts, remove the end cover 9, and the guide assembly can be taken out from the assembly hole 2.

[0031] During operation, the electrode wire 100 passes through the guide wheel 4 and the clamping plate 11 to form a turning channel, achieving a preset angle of turning. During cutting, the current is transmitted to the guide wheel 4 through the power terminal 14, carbon brush, and rotating shaft 3, and then to the electrode wire 100. The electrode wire 100 reciprocates at high speed, generating electric spark corrosion with the workpiece and cutting the metal workpiece.

[0032] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electrode wire guide mechanism which is easy to disassemble, characterized by: The guide assembly comprises a rotating shaft, a guide wheel fixed to the middle part of the rotating shaft, two bearings arranged at the two ends of the rotating shaft, and two bearing seats for mounting the bearings.

2. An electrode wire guide mechanism according to claim 1, wherein: The assembly hole is provided with a limiting unit, so that the guide assembly can be in a preset position after being assembled in the assembly hole.

3. An electrode wire guide mechanism according to claim 2, wherein: The limiting unit is a limiting flange arranged on the inner wall of the assembly hole, the outer diameter of one bearing seat is smaller than the inner diameter of the limiting flange, and the outer diameter of the other bearing seat is larger than the inner diameter of the limiting flange.

4. An electrode wire guide mechanism according to claim 3, wherein: The bearing seat with a smaller outer diameter is movably sleeved with a positioning sleeve, and the outer diameter of the positioning sleeve is matched with the inner diameter of the assembly hole.

5. The easily removable electrode guide of claim 1, wherein: The mounting arm is provided with a fastening hole communicated with the assembly hole, and the fastening bolt can act on the outer wall of the bearing seat through the fastening hole to limit and fix the guide assembly.

6. The easily removable electrode guide of claim 1, wherein: The end cap is threadedly connected to the end part of the bearing seat.

7. The easily removable electrode guide of claim 1, wherein: An insulating isolation layer is arranged through the end faces of the bearing seat, and an electricity connection end is arranged on the end face of the bearing seat inside the isolation layer.

8. The easily removable electrode guide of claim 1, wherein: The electrode wire is arranged through the turning channel formed by the clamping of the outer periphery of the guide wheel and the turning surface of the clamping plate, so that the electrode wire is turned by a preset angle.

9. An electrode wire guide mechanism according to claim 8, wherein: The clamping plate is in L shape.

10. An electrode wire guide mechanism according to claim 9, wherein: The mounting arm is provided with an assembly groove for mounting the clamping plate, the assembly groove is arranged in the recessed end of the mounting arm, and the assembly hole is arranged through the end faces of the mounting arm and communicated with the assembly groove.

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