Device for adjusting level of electrode

Abstract

The invention discloses a device for adjusting the level of an electrode, and belongs to the technical field of electric spark machining. The device comprises an adjusting block and an adjusting wedge, the adjusting block is connected with an electrode; the adjusting wedge is movably arranged on the peripheral side of the adjusting block, an adjusting seam is formed in the matching position of the adjusting block and the adjusting wedge, the forming direction of the adjusting seam is consistent with the moving direction of the adjusting wedge, the thickness of the adjusting wedge is gradually changed in the moving direction of the adjusting wedge, the adjusting wedge is partially embedded into the adjusting seam, and the depth of the adjusting wedge embedded into the adjusting seam is changed by moving the adjusting wedge. The supporting height of the matched position of the adjusting wedge and the adjusting block is continuously adjusted, and then the levelness of an electrode connected with the adjusting block is adjusted. Through cooperation of the adjusting wedge with the gradually-changed thickness and the adjusting seam, linear motion is converted into continuous supporting height change, stepless precision adjustment of the electrode levelness is achieved, the electrode planeness can be easily corrected to the needed precision, and the precision and efficiency of electric spark machining are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of electrical discharge machining (EDM) technology, and in particular to a device for adjusting electrode level. Background Technology

[0002] In electrical discharge machining (EDM), the clamping accuracy of the electrode, especially its levelness, is one of the key factors determining the dimensional accuracy and surface quality of the machined part. Poor electrode levelness will directly lead to shape errors and dimensional deviations in the machined cavities or holes, and in severe cases, may even result in the scrapping of the workpiece.

[0003] In existing technologies, the methods for adjusting electrode level are typically quite primitive. For example, alignment is achieved by placing copper shims or thin sheets between the electrode holder and the machine tool spindle. The accuracy of this method relies entirely on the operator's experience; the adjustment process is cumbersome, inefficient, and cannot achieve precise, continuous quantitative adjustment. Once fine-tuning is needed, shims of different thicknesses must be replaced, making it difficult to stably align the electrode flatness to the required accuracy, and thus failing to meet the machining requirements of high-precision components (such as electro-hydraulic servo valves).

[0004] Therefore, there is an urgent need for a device with a sophisticated structure that can achieve stepless precision adjustment of the level of the regulating electrode in order to solve the above-mentioned problems in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a device for adjusting the level of electrodes, so as to solve the problems of low precision and inability to achieve continuous precision adjustment in the existing electrode level adjustment methods, and to provide a device for adjusting the level of electrodes with a compact structure that can achieve stepless precision adjustment.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides a device for adjusting the level of an electrode, comprising an adjusting block and an adjusting wedge. The adjusting block is used to connect to the electrode. The adjusting wedge is movably disposed on the outer periphery of the adjusting block. An adjusting slit is formed at the mating point between the adjusting block and the adjusting wedge. The opening direction of the adjusting slit is consistent with the moving direction of the adjusting wedge. The thickness of the adjusting wedge gradually varies along its moving direction. The adjusting wedge is partially embedded in the adjusting slit. By moving the adjusting wedge, its embedding depth in the adjusting slit is changed, thereby continuously adjusting the support height at the mating point between the adjusting wedge and the adjusting block, and thus adjusting the level of the electrode connected to the adjusting block.

[0007] As one embodiment, the outer periphery of the adjusting block is provided with a wedge-shaped hole corresponding to the adjusting wedge. The maximum support height of the adjusting wedge is greater than the maximum opening height of the wedge-shaped hole. The adjusting slot is opened corresponding to the wedge-shaped hole. The adjusting slot extends into the adjusting block and communicates with the wedge-shaped hole. The extension depth of the adjusting slot covers the opening area of ​​the wedge-shaped hole.

[0008] As one embodiment, it also includes an adjusting screw, which is threadedly connected to the adjusting block and engages with the adjusting wedge. Tightening the adjusting screw can cause the adjusting wedge to move linearly along the inclined surface of the wedge-shaped hole.

[0009] As one embodiment, the adjusting screw is a standard part, and the adjusting wedge has a countersunk hole adapted to the adjusting screw.

[0010] As one embodiment, the adjusting block is provided with four adjusting wedges along the circumferential direction.

[0011] As one embodiment, the adjustment block is provided with a clamp connection part on the side away from the electrode, and the clamp connection part is used to connect with an external clamp.

[0012] In one embodiment, the electrode is fixed on an electrode holder, and the electrode holder and the adjustment block are detachably connected.

[0013] In one embodiment, the electrode holder is connected to the adjusting block by connecting screws, the connecting screws being correspondingly provided with the adjusting wedges, and a gap is reserved between the contact surfaces of the electrode holder and the adjusting block, the gap being used to provide deformation compensation space for the horizontal fine adjustment of the adjusting block.

[0014] As one embodiment, the adjusting block is made of 45 steel or 20CrMnTi.

[0015] As one embodiment, the adjusting wedge is made of high-carbon chromium bearing steel or Cr12MoV.

[0016] The present invention achieves the following technical effects compared to the prior art: This invention achieves stepless and continuous adjustment of the support height by setting an adjustment slot on the adjustment block and cooperating with a gradually thickening adjustment wedge that moves in the same direction. The operator only needs to push the adjustment wedge to precisely control its insertion depth into the adjustment slot, thereby linearly changing the local support height and achieving precise correction of the electrode levelness. This purely mechanical structure is not only stable and reliable, but also eliminates the discreteness and uncertainty of traditional shim adjustment, enabling stable correction of the electrode flatness to the required accuracy, significantly improving the precision and efficiency of electrical discharge machining. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the device for adjusting the level of electrodes in an embodiment of the present invention, showing the installation of electrodes. Figure 2 This is a schematic diagram of the device for adjusting the electrode level installed on the spindle of an electrical discharge machining equipment in an embodiment of the present invention; Figure 3 for Figure 1 A bottom view; Figure 4 This is a cross-sectional view of the device for adjusting the electrode level in an embodiment of the present invention; Figure 5 This is a schematic diagram of the adjusting wedge from various perspectives in an embodiment of the present invention; Figure 6 This is a schematic diagram showing the adjusting wedge located inside the wedge-shaped hole in an embodiment of the present invention; Figure 7 This is a schematic diagram of the wedge-shaped hole in an embodiment of the present invention.

[0019] Among them, 1. Adjusting block; 11. Adjusting slot; 12. Wedge hole; 13. Fixture connection part; 2. Adjusting wedge; 21. Countersunk hole; 3. Adjusting screw; 4. Electrode fixing frame; 5. Connecting screw; 6. Electrode; 7. Spindle of EDM equipment. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The purpose of this invention is to provide a device for adjusting the level of electrodes, so as to solve the problems of low precision and inability to achieve continuous precision adjustment in the existing electrode level adjustment methods, and to provide a device for adjusting the level of electrodes with a compact structure that can achieve stepless precision adjustment.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-7As shown, this embodiment provides a device for adjusting the level of an electrode, including an adjusting block 1 and an adjusting wedge 2. The adjusting block 1 is used to connect to an electrode 6. The adjusting wedge 2 is movably disposed on the outer periphery of the adjusting block 1. An adjusting slot 11 is provided at the mating point of the adjusting block 1 and the adjusting wedge 2. The opening direction of the adjusting slot 11 is consistent with the moving direction of the adjusting wedge 2. The thickness of the adjusting wedge 2 is gradually set along its moving direction. The adjusting wedge 2 is partially embedded in the adjusting slot 11. By moving the adjusting wedge 2, its embedding depth in the adjusting slot 11 is changed, so as to continuously adjust the support height at the mating point of the adjusting wedge 2 and the adjusting block 1. This fine adjustment of height is ultimately transmitted to the electrode 6 connected to the adjusting block 1, realizing the precise correction of the level of the electrode 6. This embodiment, through the cooperation of the adjusting slot 11 and the gradually thickening adjusting wedge 2, transforms simple linear motion into continuous support height change, realizing stepless precise adjustment of the level of the electrode 6. The structure is simple and the adjustment accuracy is high.

[0024] Optionally, electrode 6 can be directly fixed to adjustment block 1, or indirectly fixed to adjustment block 1 through an intermediate component (such as electrode fixing bracket 4).

[0025] Optionally, the gradient surface of the adjusting wedge 2 can be an inclined surface or a curved surface, as long as its thickness can change continuously with the direction of movement.

[0026] In one embodiment, a wedge-shaped hole 12 corresponding to the adjusting wedge 2 is provided on the outer periphery of the adjusting block 1. The maximum support height of the adjusting wedge 2 is greater than the maximum opening height of the wedge-shaped hole 12. This ensures that the adjusting wedge 2 can always maintain effective contact with the inner wall of the wedge-shaped hole 12, providing stable support. An adjusting slot 11 is opened corresponding to the wedge-shaped hole 12. The adjusting slot 11 extends into the adjusting block 1 and communicates with the wedge-shaped hole 12. The extension depth of the adjusting slot 11 covers the opening area of ​​the wedge-shaped hole 12. The existence of the adjusting slot 11 gives the peripheral sidewall of the wedge-shaped hole 12 a greater elastic deformation capacity in the support height direction. When the adjusting wedge 2 is inserted, it can more sensitively transmit the wedge force as a change in support height, while also avoiding stress concentration. It is understood that the wedge-shaped hole 12 can be a trapezoidal hole adapted to the shape of the adjusting wedge 2, or a hole of other shapes, as long as it can provide a guiding and supporting surface for the adjusting wedge 2.

[0027] As one implementation, the sidewall of the wedge hole 12 adopts an arc-shaped transition design. On the one hand, it can effectively disperse the stress concentration generated during the adjustment process, prevent the adjustment block 1 from being fatigued due to repeated elastic deformation, and significantly improve the service life of the device. On the other hand, the arc-shaped transition design, together with the adjustment slot 11, forms a deformation unit with good elastic recovery capability, so that the adjustment wedge 2 can obtain a smoother and more linear change in support force when moving, thereby further improving the precision and feel consistency of the horizontal adjustment of the electrode 6.

[0028] As one embodiment, it also includes an adjusting screw 3, which is threadedly connected to the adjusting block 1 and cooperates with the adjusting wedge 2. Tightening the adjusting screw 3 can drive the adjusting wedge 2 to move linearly along the inclined surface of the wedge-shaped hole 12. In this embodiment, the adjusting screw 3 is used as the driving component to convert the rotational motion into the precise linear motion of the adjusting wedge 2, realizing quantitative control of the adjustment amount, which is convenient to operate and has a self-locking function, which can effectively prevent the position from changing after adjustment.

[0029] Optionally, the head of the adjusting screw 3 can be designed as an internal hexagon or a slotted head to accommodate different operating tools.

[0030] Optionally, a guide groove can be provided on the adjusting wedge 2, and a guide post can be provided on the adjusting block 1 to cooperate with it, so as to prevent the adjusting wedge 2 from deflecting during the movement.

[0031] In one embodiment, the adjusting screw 3 is a standard part, and the adjusting wedge 2 has a countersunk hole 21 that matches the adjusting screw 3. In this embodiment, by providing a countersunk hole 21 on the adjusting wedge 2, the head of the adjusting screw 3 can be embedded therein, which not only achieves the drive connection, but also has a compact structure, avoids the interference problem that may be caused by the exposed head of the adjusting screw 3, and reduces manufacturing costs and replacement difficulty by using a standard part.

[0032] Optionally, the countersunk hole 21 can be a cylindrical countersunk hole or a tapered countersunk hole to accommodate adjusting screws 3 with different head shapes.

[0033] In one embodiment, the adjusting block 1 is provided with four adjusting wedges 2 along its circumference. It can be understood that the four adjusting wedges 2 are orthogonally distributed in pairs, corresponding to the height of the adjusting block 1 in four directions. By setting four circumferentially distributed adjusting wedges 2, the levelness of the adjusting block 1 and its electrode 6 in the X and Y orthogonal directions can be independently and precisely corrected, meeting the comprehensive requirements for flatness adjustment in precision machining.

[0034] Optionally, the number of adjusting wedges 2 can be set to two or three depending on the specific shape of adjusting block 1 and the adjustment requirements, as long as multi-directional adjustment can be achieved.

[0035] As one embodiment, the adjusting block 1 is provided with a clamping connection part 13 on the side away from the electrode 6. The clamping connection part 13 is used to connect with an external clamp (such as a 3R clamp) to fix the entire device on the spindle 7 of the electrical discharge machining equipment, thereby improving the versatility and clamping efficiency of the device.

[0036] Optionally, the fixture connection 13 can be a standard threaded hole, a positioning groove, or an interface structure adapted to a specific quick-change fixture.

[0037] As one embodiment, the clamp connection part 13 has a threaded hole structure, and the position of the threaded hole is offset from the position of the adjusting wedge 2 in the vertical direction, and the mating surfaces of the external clamp and the adjusting block 1 are in a gapless fit.

[0038] In one embodiment, electrode 6 is fixed on electrode holder 4, and electrode holder 4 is detachably connected to adjusting block 1. By using electrode holder 4, compatible installation of electrodes 6 of different shapes and sizes is achieved. Operators can configure corresponding electrode holders 4 for different electrodes 6 without replacing the entire adjusting device, thus improving processing efficiency and tooling versatility.

[0039] In one embodiment, the electrode holder 4 is connected to the adjusting block 1 via connecting screws 5. The connecting screws 5 and adjusting wedges 2 are correspondingly positioned. A gap is provided between the contact surfaces of the electrode holder 4 and the adjusting block 1, providing deformation compensation space for fine-tuning the horizontal position of the adjusting block 1. When the adjusting screw 3 is rotated to move the adjusting wedge 2, the adjusting block 1 undergoes a slight elastic deformation under the pushing force of the adjusting wedge 2. This gap provides clearance for the deformation of the adjusting block 1, preventing the rigid constraint of the electrode holder 4 from hindering the adjustment, thus enabling the adjustment action to be accurately and effectively transmitted to the electrode 6. This embodiment, by correspondingly positioning the connecting screws 5 and the adjusting wedge 2 and providing a deformation compensation gap, solves the problem of the adjusting block 1 being constrained by external connecting parts during adjustment, ensuring the sensitivity and effectiveness of the adjustment mechanism.

[0040] Optionally, the size of the gap can be optimized according to the material of the adjusting block 1 and the expected deformation, for example, set to between 0.1mm and 0.5mm.

[0041] As one implementation, the adjusting block 1 is made of 45 steel or 20CrMnTi. 45 steel has good comprehensive mechanical properties and processing performance, and is relatively inexpensive; 20CrMnTi has higher strength and wear resistance, and is suitable for applications requiring higher durability.

[0042] As one implementation, the adjusting wedge 2 is made of high-carbon chromium bearing steel or Cr12MoV. Cr12MoV has high hardness, high wear resistance and good fatigue resistance, and can withstand the friction and pressure caused by repeated adjustments, ensuring that the adjusting wedge 2 does not deform or wear during long-term use, thereby maintaining the precision of adjustment.

[0043] Optionally, the adjusting wedge 2 is made of 9Cr18MoV material.

[0044] The method of using the device for adjusting the electrode level in a preferred embodiment of the present invention is as follows: Step 1: Clamping Preparation. First, select a suitable electrode holder 4 according to the shape and size of the electrode 6 to be processed, and firmly install the electrode 6 on the electrode holder 4. Then, pre-connect the electrode holder 4 with the electrode 6 to the adjusting block 1 using the connecting screws 5, ensuring that there is a preset gap between the contact surfaces of the two. Next, use the clamping connection part 13 at the bottom of the adjusting block 1 to install and fix the entire device, along with the electrode 6, onto the 3R clamp of the EDM spindle 7.

[0045] Step Two: Initial Adjustment and Measurement. Set up the dial indicator on the machine tool worktable, ensuring the dial indicator tip contacts the lower surface of electrode 6. Manually move the machine tool spindle or worktable, measuring the height of electrode 6 at multiple diagonal positions on its plane. Based on the dial indicator readings, determine which direction electrode 6 is currently too low and which direction is too high.

[0046] Step 3: Precision Adjustment. Based on the measurement results from Step 2, use an Allen wrench to tighten the adjusting screw 3 in the corresponding direction. For example, if the left side of electrode 6 is too low, tighten the adjusting screw 3 located on the left side of adjusting block 1. As the adjusting screw 3 advances, it pushes the adjusting wedge 2, which it engages with, deeper into the adjusting slot 11. Due to the increasing thickness of the adjusting wedge 2, its depth embedded in the adjusting slot 11 increases, thereby raising the left side of the adjusting block 1. This slight increase is transmitted to electrode 6 through the electrode holder 4, increasing its left side height. While tightening, observe the dial indicator reading in real time until the flatness of electrode 6 reaches the required range (e.g., ≤0.001mm).

[0047] Step Four: Tightening and Machining. After completing the precision adjustments in all directions, confirm that the dial indicator reading is within acceptable limits. At this point, further tighten the connecting screws 5 at each location to ensure the relative positions of all components are fixed. Then, remove the dial indicator, start the electrical discharge machining (EDM) machine, and begin machining the workpiece.

[0048] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A device for adjusting the level of electrodes, characterized in that, include: Adjustment block (1), the adjustment block (1) is used to connect to electrode (6); And an adjusting wedge (2), the adjusting wedge (2) is movably disposed on the outer periphery of the adjusting block (1), an adjusting slot (11) is provided at the mating point of the adjusting block (1) and the adjusting wedge (2), the opening direction of the adjusting slot (11) is consistent with the moving direction of the adjusting wedge (2), the thickness of the adjusting wedge (2) is gradually set along its moving direction, the adjusting wedge (2) is partially embedded in the adjusting slot (11), by moving the adjusting wedge (2) to change its embedding depth in the adjusting slot (11), so as to continuously adjust the support height at the mating point of the adjusting wedge (2) and the adjusting block (1), thereby adjusting the level of the electrode (6) connected to the adjusting block (1).

2. The device for adjusting the level of the electrodes according to claim 1, characterized in that, The outer periphery of the adjusting block (1) is provided with a wedge-shaped hole (12) corresponding to the adjusting wedge (2). The maximum support height of the adjusting wedge (2) is greater than the maximum opening height of the wedge-shaped hole (12). The adjusting slot (11) is opened corresponding to the wedge-shaped hole (12). The adjusting slot (11) extends into the adjusting block (1) and communicates with the wedge-shaped hole (12). The extension depth of the adjusting slot (11) covers the opening area of ​​the wedge-shaped hole (12).

3. The device for adjusting the level of the electrodes according to claim 2, characterized in that, It also includes an adjusting screw (3), which is threadedly connected to the adjusting block (1) and cooperates with the adjusting wedge (2). Tightening the adjusting screw (3) can drive the adjusting wedge (2) to move linearly along the inclined surface of the wedge hole (12).

4. The device for adjusting the level of the electrodes according to claim 3, characterized in that, The adjusting screw (3) is a standard part, and the adjusting wedge (2) has a countersunk hole (21) that matches the adjusting screw (3).

5. The device for adjusting the level of the electrodes according to claim 1, characterized in that, The adjusting block (1) is provided with four adjusting wedges (2) along the circumferential direction.

6. The device for adjusting the level of the electrodes according to claim 1, characterized in that, The adjustment block (1) is provided with a clamp connection part (13) on the side away from the electrode (6), and the clamp connection part (13) is used to connect with an external clamp.

7. The device for adjusting the level of the electrodes according to claim 1, characterized in that, The electrode (6) is fixed on the electrode holder (4), and the electrode holder (4) and the adjusting block (1) are detachably connected.

8. The device for adjusting the level of the electrodes according to claim 7, characterized in that, The electrode holder (4) is connected to the adjusting block (1) by a connecting screw (5). The connecting screw (5) is correspondingly set with the adjusting wedge (2). A gap is reserved between the contact surfaces of the electrode holder (4) and the adjusting block (1). The gap is used to provide deformation compensation space for the horizontal fine adjustment of the adjusting block (1).

9. The device for adjusting the level of the electrodes according to claim 1, characterized in that, The material of the adjusting block (1) is 45 steel or 20CrMnTi.

10. The device for adjusting the level of the electrodes according to claim 1, characterized in that, The adjusting wedge (2) is made of high carbon chromium bearing steel or Cr12MoV.

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