An electrode processing electrode dressing tool

Abstract

The utility model relates to the technical field of electric spark machining equipment relates to an electrode finishing frock of electrode processing, including base and a plurality of correction platform, correction platform includes lifting rod and adjusting nut, base is provided with the guide hole of lifting rod lift, makes lifting rod liftable connection in base, adjusting nut rotatable connection in base and adjusting nut screw thread connection in the outside of lifting rod, to make the lifting rod lift when adjusting nut rotates, lifting rod top is provided with correction electrode. Through the cooperation of lifting rod and adjusting nut can individually adjust the height of each processing electrode, and then make the height adjustment of processing electrode be suitable value, be convenient for the quick correction of processing electrode.

Description

Technical Field

[0001] This utility model relates to the technical field of electrical discharge machining equipment, and more specifically, to an electrode trimming fixture for electrode processing. Background Technology

[0002] In modern manufacturing, electrical discharge machining (EDM) technology, with its non-contact and high-precision machining characteristics, is widely used in the processing of complex surfaces and high-hardness materials. To improve production efficiency, multi-electrode synchronous machining technology has gradually become mainstream. When multiple grooves need to be machined on the surface of a workpiece, by setting two or more machining electrodes, multiple machining points can be operated simultaneously, significantly shortening the machining cycle.

[0003] However, in actual machining processes, factors such as the inhomogeneity of the workpiece material and differences in internal stress lead to significant variations in machining accuracy across different parts. During multi-electrode synchronous machining, it often occurs that the dimension of one machining point exceeds the design standard, while the dimension of another machining point is smaller than the design dimension. This accuracy deviation is particularly problematic for groove machining tasks with fixed depths, severely impacting the final quality and performance of the workpiece. Therefore, precise correction of each machining electrode is necessary to ensure that, after unified feed, the groove depth machined on the workpiece surface by each electrode strictly meets the design requirements.

[0004] Currently, a common electrode correction method involves changing the electrode polarity, connecting the machining electrode to the positive terminal and the correction electrode to the negative terminal, and utilizing the principle of electrochemical corrosion to adjust the electrode size. However, in multi-electrode synchronous machining scenarios, multiple machining electrodes need to be fed synchronously during correction and machining processes. This requires that the height of the correction electrode corresponding to each machining electrode can be flexibly adjusted according to the actual surface conditions of the workpiece. The unevenness of various parts of the workpiece surface necessitates changes in the height of the correction electrode to ensure that the height difference between the various machining electrodes after correction is appropriate. However, existing technologies do not yet offer electrode correction devices that meet these requirements, resulting in complex and cumbersome electrode correction operations that not only consume significant manpower and time but also make it difficult to guarantee correction accuracy. Utility Model Content

[0005] The purpose of this invention is to provide an electrode trimming fixture for electrode processing, which can conveniently trim multiple processing electrodes simultaneously.

[0006] The embodiments of this utility model are achieved through the following technical solutions: An electrode trimming fixture for electrode processing includes a base and several trimming tables; each trimming table includes a lifting rod and an adjusting nut; the base is provided with a guide hole for the lifting rod to move up and down, so that the lifting rod is connected to the base in a way that allows it to move up and down; the adjusting nut is rotatably connected to the base and threaded to the outside of the lifting rod, so that the lifting rod moves up and down when the adjusting nut is rotated; a trimming electrode is provided on the top of the lifting rod.

[0007] Furthermore, a workpiece placement station is provided on one side of the base for placing the workpiece to be processed, so that the processing point of the workpiece is facing upward when it is placed in the placement station; each correction table is provided with a set of correction rods; the correction rods are vertically and flexibly mounted on the base.

[0008] Furthermore, the correction rod is provided with a positioning cone corresponding to the correction table and one of the processing points respectively; the lower end of the positioning cone is conical.

[0009] Furthermore, the positioning cone is provided with a slip ring; the slip ring is slidably sleeved on the outside of the correction rod so that the positioning cone can slide along the correction rod.

[0010] Furthermore, the base is vertically provided with a lifting tube; the correction rod is provided with a guide rod; the guide rod is vertically and flexibly inserted into the lifting tube.

[0011] Furthermore, the lifting tube is also provided with a set screw, so that the set screw can be screwed into the lifting tube and tightened against the guide rod.

[0012] Furthermore, the correction electrode is connected to the top of the lifting rod by a screw.

[0013] Furthermore, the cross-section of the correction rod is rectangular.

[0014] Furthermore, the lifting rod is provided with a guide groove along its length; the guide hole wall is provided with a guide block in cooperation with the guide groove, so that the guide block is embedded in the guide groove.

[0015] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects: The height of each machining electrode can be individually adjusted using the lifting rod and adjusting nut, ensuring the electrode height is set to a suitable value for rapid correction. The calibration assembly allows the workpiece to be placed at the workpiece placement station, and the calibration rod quickly transmits the surface irregularities of the workpiece to the calibration electrode, enabling rapid and adaptive adjustment of the electrode height. The positioning cone ensures the calibration rod is accurately positioned at the machining point and the calibration electrode's correction area, preventing environmental factors from affecting positioning accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the modified electrode of this utility model.

[0017] Figure 2 This is a schematic diagram of the electrode trimming fixture of this utility model.

[0018] Figure 3 This is a schematic diagram showing the correction lever rotated to its retracted position.

[0019] Figure 4 A cross-sectional view of the electrode trimming fixture.

[0020] Reference numerals: 1-base, 2-lifting rod, 3-adjusting nut, 4-correction electrode, 5-workpiece, 6-correction rod, 7-positioning cone, 8-slip ring, 9-lifting tube, 10-guide rod, 11-set screw. Detailed Implementation

[0021] like Figures 2-4 As shown, this utility model provides an electrode trimming fixture for electrode processing. Electrode processing, also known as electrical discharge machining (EDM), requires an EDM machine. An EDM machine is a processing device that uses high-temperature erosion generated by pulsed discharge to remove metal materials. It applies a high-frequency pulse voltage between the processing electrode and the workpiece 5, causing the working fluid in the electrode gap to break down, forming an instantaneous high-temperature discharge channel, thereby removing the material. After material removal, a groove or hole is formed, thus achieving the processing purpose of workpiece 5. This device has an electrode direction switching function. During normal processing, workpiece 5 is connected to the positive electrode, and the processing electrode is connected to the negative electrode. At this time, workpiece 5 is rapidly consumed, thus achieving the processing purpose of workpiece 5. The processing electrode is gradually consumed during processing, and with product changes, the processing electrode needs to be adaptively corrected. During electrode correction, the electrode direction of the EDM machine is switched, so that the correction electrode 4 is connected to the negative electrode, and the processing electrode is connected to the positive electrode. This rapidly consumes the processing electrode, achieving the purpose of processing electrode correction. Figure 1 The diagram shows a machining electrode, which is made of copper plate. Excess copper is removed, leaving two or more portions with the same shape and size as the groove to be machined, which serve as electrodes. During machining, the electrodes are brought close to the workpiece 5, causing the workpiece 5 to form a groove with the same shape as the electrodes under the action of a high-frequency pulse voltage. This electrode dressing fixture, by mounting the base 1 on the worktable of the EDM machine, can achieve efficient and precise correction of the machining electrodes by utilizing its pulse discharge function and electrode switching characteristics. like Figure 2As shown, the base 1 serves as the supporting structure for the entire fixture. The guide holes machined on it are precisely fitted with the lifting rod 2 of the correction table, ensuring smooth up-and-down movement of the lifting rod 2 while effectively limiting its radial wobble and preventing the correction electrode 4 from shifting during adjustment. Figure 4 As shown, the adjusting nut 3 of the base 1 correction platform is rotatably connected to the protruding ring of the base 1 through a groove; at the same time, the inner wall of the adjusting nut 3 is machined with a standard trapezoidal thread, which precisely meshes with the thread on the outer wall of the lifting rod 2, forming a stable helical transmission pair. In actual operation, the operator rotates the adjusting nut 3, and according to the principle of helical transmission, the lifting rod 2 will precisely rise or fall by one pitch for each rotation, thereby achieving precise adjustment of the height of the correction electrode 4 at the top of the lifting rod 2. In multi-electrode synchronous machining scenarios, factors such as the inhomogeneity of the workpiece 5 material and differences in internal stress can lead to significant differences in the accuracy of various machining points on the surface of workpiece 5. For example, two machining points on workpiece 5 may have a diameter greater than the design value by 0.1 mm and a diameter less than the design value by 0.2 mm, both within the allowable error range. The required groove depth for these two machining points is 3 mm. Therefore, one electrode needs to be reduced by 0.1 mm, while the other electrode needs to be increased by 0.2 mm. In other words, the actual height difference between the two electrodes needs to be greater than the designed height difference by 0.3 mm.

[0022] At this point, the electrode dressing fixture of this embodiment can independently and precisely adjust the height of the correction electrode 4 corresponding to each machining point. When a dimensional deviation occurs at a certain machining point, the operator can raise or lower the height of the corresponding correction electrode 4 by rotating the adjusting nut 3, ensuring that after uniform feed, the groove depth, hole diameter, and other dimensions machined by all machining electrodes on the surface of the workpiece 5 strictly meet the design requirements. This precise height adjustment function fundamentally solves the problem of machining electrode correction caused by uneven workpiece 5 precision in the background technology, and significantly improves the accuracy and production efficiency of multi-electrode synchronous machining. In this embodiment, a high-precision workpiece placement station is specially set on one side of the base 1. The surface of this station is processed by ultra-precision grinding, and appropriate clamping components can be set according to the shape of the workpiece 5 to ensure that the workpiece 5 to be processed is stably clamped and fixed and is in a strictly horizontal state with the processing point facing upwards. Each correction table is equipped with a set of correction rods 6, which are elliptical to the base 1. When performing electrode correction, the workpiece 5 to be processed is first placed stably on the workpiece placement station, and then the correction rods 6 are lowered until they contact the processing point on the surface of the workpiece 5; then the adjusting nut 3 is rotated to raise the lifting rod 2, so that the correction electrode 4 slowly rises and abuts the correction rod 6, thus completing the rapid calibration of the height of the correction electrode 4. For the same batch of workpieces 5 to be processed, since their processing characteristics are the same and the deviations of the workpieces 5 are the same, only one height calibration is needed, and subsequent workpieces 5 can be directly corrected without repeated adjustments, which greatly saves processing preparation time. The actual height information of the machining points on the surface of the workpiece 5 is quickly and accurately transmitted to the correction electrode 4 through the correction rod 6. In traditional multi-electrode synchronous machining, the operation of measuring and adjusting the height of the correction electrode 4 for each machining point is extremely cumbersome, not only consuming a lot of time, but also easily leading to low correction accuracy due to human measurement errors. However, this solution establishes an efficient height transmission relationship through the contact between the correction rod 6 and the workpiece 5 and the correction electrode 4, simplifying the originally complex multi-step operation into a few key steps. Positioning cones 7 are installed at both ends of the correction rod 6, with the lower end of the positioning cone 7 being conical. The bottom of the positioning cone 7 is in close contact with the machining point of the workpiece 5 and the correction electrode 4. In practical applications, when the correction rod 6 descends, the lower positioning cone 7 can accurately position itself at the machining point of the workpiece 5 due to its conical structure, avoiding the influence of undulations around the machining point on the height determination of the correction rod 6. The other positioning cone 7 operates on the same principle, and the combination of the two makes the height adjustment between the machining point and the correction electrode 4 more precise. In this embodiment, a sliding slip ring 8 is fitted onto the positioning cone 7. The inner hole of the slip ring 8 is precisely fitted with the correction rod 6, ensuring that the slip ring 8 can slide freely on the correction rod 6 while avoiding positioning instability caused by excessive clearance. The outer surface of the slip ring 8 is machined with fine knurling, facilitating direct manual sliding by the operator. In actual use, when faced with machining points and correction electrodes 4 at different spacings, the operator can quickly adjust the position of the positioning cone 7 on the correction rod 6 by manually sliding the slip ring 8 according to actual needs.

[0023] The slip ring 8 enhances the flexibility and adaptability of adjusting the position of the positioning cone 7. In multi-electrode synchronous machining, the layout and spacing of machining points on different workpieces 5 vary greatly, and the traditional fixed-position positioning cone 7 cannot meet diverse machining needs. The slip ring 8 allows the positioning cone 7 to be quickly adjusted according to the actual situation. This flexible adjustment method avoids the time waste and increased costs associated with replacing different specifications of the correction rod 6, greatly improving the versatility and efficiency of the tooling. In this embodiment, a lifting tube 9 is vertically mounted on the base 1. The lifting tube 9 is made of steel pipe. The guide rod 10 of the correction rod 6 is precisely clearance-fitted with the lifting tube 9 to ensure that the guide rod 10 can rise and fall smoothly within the lifting tube 9. The cross-section of the guide rod 10 is designed to be circular. During the rising and falling of the correction rod 6, the precise fit between the guide rod 10 and the lifting tube 9 effectively limits the radial swing of the correction rod 6, ensuring the stability and accuracy of its movement. When the correction rod 6 is not in use, it can be rotated to a safe position away from the workpiece 5 and the correction electrode 4 to avoid interference during the loading and unloading of the workpiece 5 or electrode processing. Figure 3 As shown. The precise guiding cooperation between the lifting tube 9 and the guide rod 10 ensures the stability, accuracy, and flexibility of the lifting of the correction rod 6. In actual processing, the correction rod 6 requires frequent lifting and positioning operations. A stable lifting structure ensures consistent positioning accuracy each time, avoiding height adjustment errors of the correction electrode 4 caused by unstable lifting. The rotatable function greatly optimizes the tooling's operating space. When it is necessary to change the workpiece 5 or maintain the correction electrode 4, rotating the correction rod 6 provides more operating space for the operator, reducing operational difficulty and interference risks. In this embodiment, the lifting tube 9 is machined with threaded holes for installing set screws 11. Set screws 11 are hexagonal socket head cap screws. During use, the set screw 11 is screwed in using an Allen wrench, causing its end to gradually press against the guide rod 10. The set screw 11 locks the position of the guide rod 10, ensuring the stability and positioning accuracy of the correction rod 6 during processing. In this embodiment, the correction electrode 4 is connected to the top of the lifting rod 2 by a screw. The top of the lifting rod 2 has a threaded hole, and the correction electrode 4 has a through hole at the corresponding position. During connection, the correction electrode 4 is placed on the top of the lifting rod 2, so that the through hole and the threaded hole are precisely aligned, and then a screw is screwed into the threaded hole through the through hole. During electrical discharge machining (EDM), the correction electrode 4 will continuously wear down due to discharge corrosion and needs to be replaced periodically. The screw connection method is simple to operate and easy to disassemble, effectively reducing downtime caused by electrode replacement. In this embodiment, the cross-section of the correction rod 6 is designed to be rectangular. This rectangular cross-section design, in conjunction with the rectangular inner hole of the slip ring 8, forms a reliable anti-rotation structure. When the positioning cone 7 is subjected to an external force and attempts to rotate, the contact plane between the rectangular cross-section correction rod 6 and the slip ring 8 can generate sufficient resistance to limit the rotational freedom of the positioning cone 7, ensuring that the positioning cone 7 always maintains the correct orientation, thereby avoiding significant errors caused by the rotation of the positioning cone 7. In this embodiment, the lifting rod 2 is machined with a high-precision guide groove along its length, and the guide groove adopts a T-shaped groove design. A guide block mounting groove is correspondingly machined on the wall of the guide hole in the base 1. The guide block is embedded in the guide groove, and the two are precisely clearance-fitted to ensure that the guide block can slide freely within the guide groove while effectively restricting the rotational movement of the lifting rod 2. Through the precise fit between the guide groove and the guide block, precise guidance and anti-rotation functions are provided for the lifting rod 2, preventing the lifting rod 2 from rotating along with the adjusting nut 3.

Claims

1. An electrode trimming fixture for electrode processing, characterized in that: The device includes a base and several correction tables; each correction table includes a lifting rod and an adjusting nut; the base is provided with a guide hole for the lifting rod to move up and down, so that the lifting rod is connected to the base in a way that allows it to move up and down; the adjusting nut is rotatably connected to the base and threaded to the outside of the lifting rod, so that the lifting rod moves up and down when the adjusting nut is rotated; a correction electrode is provided at the top of the lifting rod.

2. The electrode trimming fixture for electrode processing according to claim 1, characterized in that: The base has a workpiece placement station on one side, so that the processing point of the workpiece is facing upward when it is placed in the placement station; each correction table is provided with a set of correction rods; the correction rods are raised and lowered on the base.

3. The electrode trimming fixture for electrode processing according to claim 2, characterized in that: The correction rod is provided with a positioning cone corresponding to the correction table and one of the processing points respectively; the lower end of the positioning cone is conical.

4. The electrode trimming fixture for electrode processing according to claim 3, characterized in that: The positioning cone is provided with a slip ring; the slip ring is slidably sleeved on the outside of the correction rod so that the positioning cone can slide along the correction rod.

5. The electrode trimming fixture for electrode processing according to claim 4, characterized in that: The base is vertically equipped with a lifting tube; the correction rod is equipped with a guide rod; the guide rod is vertically and flexibly inserted into the lifting tube.

6. The electrode trimming fixture for electrode processing according to claim 5, characterized in that: The lifting tube is also equipped with a set screw, so that the set screw can be screwed into the lifting tube and tightened against the guide rod.

7. The electrode trimming fixture for electrode processing according to claim 6, characterized in that: The correction electrode is connected to the top of the lifting rod by screws.

8. The electrode trimming fixture for electrode processing according to claim 7, characterized in that: The cross-section of the correction rod is rectangular.

9. The electrode trimming fixture for electrode processing according to claim 8, characterized in that: The lifting rod is provided with a guide groove along its length; the guide hole is provided with a guide block in cooperation with the guide groove, so that the guide block is embedded in the guide groove.

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