Vertical precise electric spark finishing structure

Abstract

The utility model relates to the technical field of precision machining, in particular to a vertical precision electric spark finishing structure which comprises a working platform, the working platform comprises a table top, sealing structures are arranged on the upper side and the lower side of the table top, a driving structure is arranged on the bottom face of the table top and comprises a power source, and an output shaft of the power source is connected with a main shaft. The spindle penetrates through the sealing structure and the tabletop and is connected with an electrode assembly. According to the grinding wheel trimming device, the multiple trimming electrodes are arranged, the grinding wheel can be trimmed according to the machining and trimming requirements, and the trimming efficiency is improved; the dressing electrode is fixed through the matching sleeve and the locking nut, the dressing electrode can be conveniently replaced, and maintenance and function expansion are facilitated; by arranging the access cover and the lower sealing sleeve, the anode slip ring can be protected, and meanwhile the working state of the prototype slip ring can be conveniently observed; the electric slip ring is used for supplying power to the electrode assembly, and the complex structure of traditional electric spark finishing is simplified.

Description

Technical Field

[0001] This utility model relates to the field of precision machining technology, specifically a vertical precision electrical discharge machining (EDM) dressing structure. Background Technology

[0002] Electrical discharge machining (EDM) can overcome the shortcomings of traditional mechanical dressing, such as low dressing efficiency and poor precision, and obtain grinding wheels with fine tips that have high sharpness and high shape accuracy to meet the processing requirements of hard and brittle materials with complex surfaces such as free-form surfaces.

[0003] Currently, in related technologies, the magnitude of electrical parameters has a significant impact on the material removal efficiency and surface quality of the grinding wheel during electrical discharge dressing. Therefore, ensuring a stable and continuous power supply to the electrodes is a core technical challenge in the electrical discharge dressing process. The current mainstream technical solution involves using an electrode holder to directly connect the power source to the electrode surface or edge via wires or cables, relying on physical contact to achieve power transmission. However, this approach carries potential risks such as insufficient continuity of power transmission or electrical contact failure. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a vertical precision EDM dressing structure.

[0005] The technical solution of this utility model is:

[0006] A vertical precision electrical discharge machining (EDM) trimming structure includes:

[0007] A working platform includes a tabletop with sealing structures on its upper and lower sides and a driving structure on the bottom surface of the tabletop. The driving structure includes a power source, and the output shaft of the power source is connected to a main shaft. An anode slip ring is connected to the middle of the main shaft and located below the tabletop. The main shaft passes through the sealing structure and the tabletop and is connected to an electrode assembly. The electrode assembly includes an electrode shaft with several trimming electrodes axially arranged on the electrode shaft.

[0008] Preferably, the sealing structure includes an upper sealing sleeve and a lower sealing sleeve, the upper sealing sleeve is fixedly installed above the table surface, the lower sealing sleeve is fixedly installed below the table surface, and the lower sealing sleeve has a half-section structure.

[0009] Preferably, an inspection cover is fixedly installed on the front side of the lower sealing sleeve. The inspection cover is made of transparent material, and the anode slip ring is located inside the lower sealing sleeve.

[0010] Preferably, the top of the main shaft is provided with a mounting sleeve that passes through the lower sealing sleeve, the platform and the upper sealing sleeve. The outer side of the top of the mounting sleeve is provided with a locking bolt, and the inner side of the mounting sleeve is tapered.

[0011] Preferably, the bottom of the electrode shaft is tapered, and the bottom of the electrode shaft is provided with a positioning groove, which corresponds to the locking bolt.

[0012] Preferably, the upper part of the electrode shaft is composed of several concentric cylinders, the diameter of the cylinders increases from top to bottom, and a keyway is provided through the side of each layer of cylinders. The inner side of the trimming electrode is provided with a groove, and the groove is aligned with the keyway.

[0013] Preferably, each of the trimming electrodes is provided with a mating sleeve, which is fitted onto the electrode shaft and inserted into the groove and keyway. The top surface of the uppermost mating sleeve is provided with a locking nut, which is threadedly connected to the electrode shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention, by setting multiple dressing electrodes, allows for dressing of the grinding wheel according to processing needs, improving dressing efficiency; the use of a matching sleeve and locking nut to fix the dressing electrodes facilitates electrode replacement, maintenance, and functional expansion; the inclusion of an inspection cover and a lower sealing sleeve protects the anode slip ring and allows for easy observation of the prototype slip ring's working status; and the use of an electric slip ring to power the electrode assembly simplifies the complex structure of traditional EDM dressing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the electrode assembly structure in this utility model;

[0018] Figure 3 This is a schematic diagram of the working platform structure of this utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of the electrode assembly and working platform structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the overall structure of this utility model.

[0021] The meanings of the labels in the diagram are as follows:

[0022] 1. Electrode assembly; 11. Electrode shaft; 12. Keyway; 13. Mating sleeve; 14. Trimming electrode; 141. Coarse trimming electrode; 142. Fine trimming electrode; 143. Micro-trimming electrode; 15. Locking nut; 16. Positioning groove;

[0023] 2. Working platform; 21. Tabletop; 22. Upper sealing sleeve; 23. Lower sealing sleeve; 24. Inspection cover;

[0024] 3. Drive structure; 31. Power source; 32. Main shaft; 33. Anode slip ring; 34. Mounting sleeve; 35. Locking bolt;

[0025] 4. Electric spindle; 5. Grinding wheel; 6. Cathode slip ring; 7. Power supply; 8. Nozzle. Detailed Implementation

[0026] 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.

[0027] Example 1:

[0028] Please see Figure 1-5 The present invention will describe the above technical solution in detail through the following embodiments:

[0029] A vertical precision electrical discharge machining (EDM) trimming structure includes:

[0030] The work platform 2 includes a table 21, with sealing structures on the upper and lower sides of the table 21. The bottom surface of the table 21 is provided with a drive structure 3, which includes a power source 31. The output shaft of the power source 31 is connected to a main shaft 32. The main shaft 32 is connected to an electrode assembly 1 in the middle and below the table 21. The main shaft 32 passes through the sealing structure and the table 21 and is connected to the electrode assembly 1. The electrode assembly 1 includes an electrode shaft 11, and a plurality of trimming electrodes 14 are axially arranged on the electrode shaft 11.

[0031] The power source 31 uses a servo motor. The output shaft of the power source 31 is connected to the main shaft 32 through a coupling. When the power source 31 is working, it can drive the main shaft 32 to rotate through the coupling.

[0032] The sealing structure includes an upper sealing sleeve 22 and a lower sealing sleeve 23. The upper sealing sleeve 22 is fixedly installed on the table 21 above by bolts, and the lower sealing sleeve 23 is fixedly installed on the table 21 below by bolts. The lower sealing sleeve 23 has a half-section structure.

[0033] The upper sealing sleeve 22 and the lower sealing sleeve 23 are coaxial.

[0034] A maintenance cover 24 is fixedly installed on the front side of the lower sealing sleeve 23 by screws. The maintenance cover 24 is made of transparent material, and the anode slip ring 33 is located inside the lower sealing sleeve 23.

[0035] The anode slip ring 33 is connected to the positive terminal of the power supply 7 via a wire, and the wire of the anode slip ring 33 passes through the connection between the inspection cover 24 and the lower sealing sleeve 23.

[0036] The power source 31 is fixedly installed directly below the lower sealing sleeve 23 by bolts. The lower sealing sleeve 23, the inspection cover 24 and the power source 31 form a sealed space to protect the anode slip ring 33.

[0037] A mounting sleeve 34 is provided at the top of the main shaft 32, passing through the lower sealing sleeve 23, the table 21 and the upper sealing sleeve 22. A locking bolt 35 is provided on the outer side of the top of the mounting sleeve 34, and the inner side of the mounting sleeve 34 is tapered.

[0038] The main shaft 32 and the upper sealing sleeve 22 are rotatably connected to the lower sealing sleeve 23 via bearings.

[0039] The bottom of the electrode shaft 11 is tapered, and the bottom of the electrode shaft 11 is provided with a positioning groove 16, which corresponds to the locking bolt 35.

[0040] The inner side of the mounting sleeve 34 is adapted to the bottom of the electrode shaft 11, and the tapered surface facilitates installation.

[0041] After the electrode shaft 11 is inserted into the mounting sleeve 34, the positioning groove 16 is aligned with the locking bolt 35, and then the locking bolt 35 is tightened to fix the electrode shaft 11.

[0042] The upper part of the electrode shaft 11 is composed of several concentric cylinders with the cylinder diameter increasing from top to bottom. Each layer of cylinders has a keyway 12 extending upwards on its side. The trimming electrode 14 has a groove on its inner side, which is aligned with the keyway 12.

[0043] The dressing electrode 14 includes a coarse dressing electrode 141, a fine dressing electrode 142, and a micro dressing electrode 143. The coarse dressing electrode 141, the fine dressing electrode 142, and the micro dressing electrode 143 are made of different materials and are used for coarse dressing, fine dressing, and micro dressing of the grinding wheel 5, respectively.

[0044] The coarse trimming electrode 141, the fine trimming electrode 142, and the micro trimming electrode 143 are installed sequentially from bottom to top.

[0045] Each trimming electrode 14 is provided with a mating sleeve 13, which is fitted onto the electrode shaft 11 and inserted into the groove and keyway 12. The top surface of the uppermost mating sleeve 13 is provided with a locking nut 15, which is threadedly connected to the electrode shaft 11.

[0046] The sleeve 13 is used to separate different trimming electrodes 14, and the groove and keyway 12 are used to fix the trimming electrodes 14.

[0047] Working principle;

[0048] The negative terminal of the power supply 7 is connected to the electric spindle 4 through the cathode slip ring 6, and the grinding wheel 5 is fixedly installed on the output shaft of the electric spindle 4.

[0049] The positive terminal of the power supply 7 is connected to the anode slip ring 33, and supplies power to the dressing electrode 14 through the main shaft 32 and the electrode shaft 11.

[0050] During dressing, the grinding wheel 5 and the dressing electrode 14 maintain a small gap and rotate relative to each other. The nozzle 8 sprays electrolyte to fill the gap, and the grinding wheel 5 is dressed under the pulse voltage of the power supply 7.

[0051] According to the processing requirements, the grinding wheel 5 is aligned with different dressing electrodes 14, and the rough dressing electrode 141, fine dressing electrode 142 and micro dressing electrode 143 are used to achieve rough dressing, fine dressing and micro dressing of the grinding wheel 5.

[0052] When the dressing electrode 14 needs to be replaced, the locking nut 15 can be unscrewed, the mating sleeve 13 can be removed, and the dressing electrode 14 can be replaced.

[0053] Alternatively, the locking bolt 35 can be loosened and the entire electrode assembly 1 can be replaced.

[0054] During operation, the working status of the anode slip ring 33 can be observed through the transparent inspection cover 24.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vertical precision electrical discharge machining (EDM) trimming structure, characterized in that, include: The work platform (2) includes a table (21), the table (21) has sealing structures on its upper and lower sides, and a drive structure (3) is provided on the bottom surface of the table (21). The drive structure (3) includes a power source (31), the output shaft of the power source (31) is connected to a spindle (32), the spindle (32) is connected to an anode slip ring (33) in the middle and below the table (21), the spindle (32) passes through the sealing structure and the table (21) and is connected to an electrode assembly (1). The electrode assembly (1) includes an electrode shaft (11), and a plurality of trimming electrodes (14) are axially arranged on the electrode shaft (11).

2. The vertical precision electric spark trimming structure according to claim 1, wherein: The sealing structure includes an upper sealing sleeve (22) and a lower sealing sleeve (23). The upper sealing sleeve (22) is fixedly installed above the table surface (21), and the lower sealing sleeve (23) is fixedly installed below the table surface (21). The lower sealing sleeve (23) has a half-section structure.

3. The vertical precision electro-discharge dressing structure according to claim 2, wherein: A maintenance cover (24) is fixedly installed on the front side of the lower sealing sleeve (23). The maintenance cover (24) is made of transparent material, and the anode slip ring (33) is located inside the lower sealing sleeve (23).

4. The vertical precision electro-discharge dressing structure of claim 2, wherein: The top of the main shaft (32) is provided with a mounting sleeve (34) that passes through the lower sealing sleeve (23), the table (21) and the upper sealing sleeve (22). The mounting sleeve (34) has a locking bolt (35) on the outer side of its top and a tapered surface on the inner side.

5. The vertical precision electro-discharge dressing structure according to claim 4, characterized in that: The bottom of the electrode shaft (11) is tapered, and the bottom of the electrode shaft (11) is provided with a positioning groove (16), which corresponds to the locking bolt (35).

6. The vertical precision electro-discharge dressing structure according to claim 5, wherein: The upper part of the electrode shaft (11) is composed of several concentric cylinders with the cylinder diameter increasing from top to bottom. Each layer of cylinders has a keyway (12) extending upward through its side. The trimming electrode (14) has a groove on its inner side, which is aligned with the keyway (12).

7. The vertical precision electro-discharge dressing structure of claim 6, wherein: Each of the trimming electrodes (14) is provided with a mating sleeve (13) above it. The mating sleeve (13) is fitted on the electrode shaft (11) and inserted into the groove and keyway (12). The top surface of the uppermost mating sleeve (13) is provided with a locking nut (15), which is threadedly connected to the electrode shaft (11).

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