Die for opening electrode machining

Abstract

The die comprises an electrode and a molybdenum wire, an upper opening is designed in the upper end of a female die block body, a lower opening is correspondingly designed in the lower end of the female die block body, the upper opening and the lower opening have the same edge number, and the area of the lower opening is scaled to the upper opening in an equal ratio, so that the upper opening and the lower opening communicate with each other to form a conical channel for the electrode and the molybdenum wire to penetrate through. According to the machining device, a plurality of opening electrodes can be machined at the same time, tedious machining procedures are reduced, the machining efficiency of the opening electrodes is improved, the electrodes with the multiple openings can be machined according to the geometric edge number only by changing the appearance of the female die block, the degree of finish after cutting is high, follow-up grinding and other treatment work does not need to be manually conducted again, and the machining efficiency is improved. The electrode can be directly clamped on the electric discharge machine for use, the situation that copper-tungsten alloy with higher hardness needs to be adopted due to process limitation in the prior art is avoided, a copper rod can be adopted as the electrode, and cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of electrode processing, and in particular to a mold for processing an open electrode. Background Art

[0002] In the field of electrospark machining, electrodes are key tools used to manufacture workpieces of complex shapes. Traditional electrodes are often made of copper or copper alloys. When in use, the electrode is brought close to the object to be cut and a small gap is maintained. Pulse spark discharge is performed under a strong pulse electric field in the small gap. The discharge process produces a metal corrosion effect, thereby forming the workpiece. Under conditions such as electrospark drilling, the electrode needs to be opened. At this time, the electrode usually used is a hollow copper rod, and a groove is cut on the outer circumference of the hollow copper rod along the length direction.

[0003] At present, when processing this kind of electrode with cutting groove (referred to as open electrode), we first need to perform lathe outer diameter cutting processing, and then use the cutting disc to groove the copper-tungsten alloy by controlling the CNC machine tool, and finally use the saw blade to cut. At this time, the electrode cutting groove formed will have many burrs, and the electrode cutting groove needs to be processed again manually. The whole processing process takes a long time, consumes manpower, and is difficult to handle.

[0004] In response to the problems existing in the above-mentioned technology, CN107649757A discloses a combined electrode fixture used for electrospark machining. The combined electrode fixture used for electrospark machining serves to extend the electrode assembly through the setting of columns. There is no need for each electrode to have a correspondingly large size, which saves materials, reduces costs and reduces the weight of the electrode assembly. It is convenient to take and install the electrode and reduces the duration of the machining process.

[0005] Although the above-mentioned related technologies reduce the processing time and solve the problem of single-piece electrode processing production efficiency, the electrode opening is difficult to process and requires multiple procedures such as CNC cutting and manual polishing. The electrode cutting groove after processing has many burrs and large surface roughness, and there are limitations on the hardness of the electrode material. The commonly used copper-tungsten alloy electrode is still expensive. Problems such as high cost still exist. Utility Model Content

[0006] In order to be able to perform multiple opening processing on the electrode and improve the smoothness of the electrode after cutting, the present application provides a mold for processing an open electrode.

[0007] The present application provides a mold for processing an open electrode using the following technical solution:

[0008] A mold for processing open electrodes, characterized in that an upper opening is designed at the upper end of a concave module body, and a lower opening is correspondingly designed at the lower end, so that they are interconnected to form a conical channel for the processed electrode and the molybdenum wire assembly to pass through, and a tapered clamping block for clamping the electrode is installed in the conical channel.

[0009] Furthermore, the upper opening and the lower opening have the same number of opening sides, the concave module corresponds to the number of opening sides of the electrode being processed, and the shape is an equilateral polygon.

[0010] Furthermore, the electrode is a vertical hollow metal tube with equal upper and lower areas.

[0011] Furthermore, the conical channel has the same taper as the tapered clamping block, and an electrode for processing is clamped in the tapered clamping block, and the electrode is a vertical hollow metal tube with equal upper and lower areas.

[0012] Furthermore, a first electrode clamping hole is opened at the center point of the top surface of the tapered clamping block, and a second electrode clamping hole of the same size is set at the center point of the bottom surface of the tapered clamping block, which is connected to the first electrode clamping hole to form a hollow accommodating chamber, and the processed electrode is located in the accommodating chamber.

[0013] Furthermore, the second electrode clamping hole on the bottom surface of the tapered clamping block is connected to the midpoints of each side through the cutting groove.

[0014] Further, the molybdenum wire assembly is in a cutting groove on the bottom surface of the tapered channel.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. By designing a concave module with a tapered channel, multiple open electrodes can be processed at the same time, reducing cumbersome processing procedures and improving the processing efficiency of open electrodes.

[0017] 2. By using molybdenum wire to perform wire cutting on the lower part of the electrode, the smoothness after cutting is improved, and no subsequent grinding and other processing work is required. It can be directly clamped on the EDM machine for use, and avoids the need to use copper-tungsten alloy with higher hardness due to process limitations. Now copper rods can be used as electrodes, reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a mold for processing an open electrode according to an embodiment of the present application.

[0019] Figure 2 It is a front view of the mold for processing the open electrode according to an embodiment of the present application.

[0020] Figure 3 yes Figure 2 AA section view of the processing mold shown.

[0021] Figure 4 It is a schematic top plan view of the processing mold of an embodiment of the present application.

[0022] Figure 5 It is a lower plan schematic diagram of the processing mold of an embodiment of the present application.

[0023] Figure 6 It is a schematic diagram of an open electrode processed by an embodiment of the present application.

[0024] Figure 7 yes Figure 6 Schematic diagram of the upper surface of the electrode after processing.

[0025] Figure 8 yes Figure 6 A schematic side view of the upper surface of the electrode after machining is shown.

[0026] Fig. 9 yes Figure 6 Schematic diagram of the lower surface of the electrode after processing.

[0027] Fig.10 yes Figure 6 Schematic side view of the lower surface of the electrode after processing.

[0028] Fig.11 yes Figure 6 Schematic diagram of the cutting surface of the electrode after machining.

[0029] Fig.12 yes Figure 6 The enlarged view of the cut surface B of the electrode after machining is shown.

[0030] Explanation of the reference numerals: 1. concave module; 11. upper opening; 12. lower opening; 13. conical channel; 2. electrode; 3. molybdenum wire assembly; 4. tapered clamping block; 41. top surface; 42. bottom surface; 411. first electrode clamping hole; 422. second electrode clamping hole; 421. cutting groove; 43. accommodating chamber. DETAILED DESCRIPTION

[0031] In order to better understand the purpose, structure and function of the present invention, a mold for processing an open electrode of the present application is further described in detail below with reference to the accompanying drawings.

[0032] like Figure 1-12 As shown:

[0033] Reference Figure 1-Figure 3The set of molds can clamp a concave module (1), an upper opening (11) is set at the upper end of the concave module (1), and a lower opening (12) with the same number of opening edges but a proportionally reduced cross-section is set at the lower end of the concave module (1), so that the edge angle of the concave module (1) deviates to produce a taper, thereby forming a tapered channel (13) between the upper opening (11) and the lower opening (12), and a plurality of tapered channels (13) can be set, and the tapered channels (13) are symmetrically and equidistantly distributed on the concave module (1), and are used to assemble a plurality of tapered clamping blocks (4), the taper of the tapered clamping blocks (4) is consistent with the taper of the tapered channels (13), so that after the clamping blocks with the same taper are inserted, they can automatically fit tightly and bite to reach the processing positioning point. When in use, by changing the number of geometric edges of the upper opening surface (11) and the lower opening surface (12) of the concave module (1), the number of openings of the processed electrode (2) is correspondingly changed, such as a triangle, a quadrilateral, a pentagon, etc., so that an electrode with 3 to 6 openings or even more openings can be processed.

[0034] Reference Figure 4 The tapered clamping block (4) is assembled in the tapered channel (13), and a first electrode clamping hole (411) is arranged at the center point of the top surface (41) of the tapered clamping block (4). The tapered clamping block (4) is processed by a tapered cutting process, so that a gap is left between the tapered clamping block (4) and the first electrode clamping hole (411), which plays a surrounding and fixing role on the electrode, and the molybdenum wire component (3) contacts the groove in the top surface (41), but is still a distance away from the electrode clamping hole (411), that is, the molybdenum wire component (3) penetrates the top surface (41) but does not contact the upper part of the electrode (2). The processed electrode maintains the original ring structure, which is convenient for subsequent electric spark clamping.

[0035] Reference Figure 5A second electrode clamping hole (422) is arranged at the center point, and the first electrode clamping hole (411) and the second electrode clamping hole (422) form a hollow accommodating chamber (43), so that the electrode (2) to be processed is surrounded and fixed in the middle from top to bottom, and the second electrode clamping hole (422) is connected to the midpoint of each side through a cutting groove (421) to allow the processing electrode (2) and the molybdenum wire assembly (3) for taper processing to pass through, thereby performing three-side cutting processing on the electrode. When in use, the processing electrode (2) is placed vertically in the accommodating chamber (43), and the molybdenum wire assembly (3) passes through the cutting groove (421) of the lower opening surface to perform wire cutting on the working electrode (2). The tapered processing molybdenum wire assembly (3) is in the middle and lower part of the accommodating chamber (43), providing wire cutting and supporting force for the electrode. After cutting one side, the triangular tapered clamping block (4) is taken out of the mold, and the position of the clamping block (4) is rotated to process the next side. After all three sides are cut, the molybdenum wire assembly (3) will leave an inclination at the intersection of the cutting, which increases the supporting force of the three separate electrode sheets cut by the molybdenum wire assembly (3) below, so that the three independent copper electrodes do not need to be reassembled.

[0036] Reference Figure 6-Figure 12 The figure shows the structure of the electrode (2) after processing. The upper part of the electrode (2) does not contact the molybdenum wire assembly (3) and no wire cutting is performed. Since the electrode is a vertical hollow metal tube structure, the upper part still maintains an intact ring shape, which is convenient for subsequent EDM machine clamping. The lower part of the electrode (2) is cut into three pieces due to the action of the cutting groove (421) on the bottom surface (42), and then three openings (21) are generated at the lower end of the electrode, which can be processed by EDM. The cutting intersection of the molybdenum wire assembly (3) leaves an inclination angle for the electrode (2), which increases the support force of the electrode (2) after being cut. When in use, the EDM machine directly clamps the upper part, and uses the molybdenum wire assembly (3) to perform wire cutting on the electrode (2). The diameter of the molybdenum wire assembly (3) is extremely fine, the finish of the cut part is high, and the shape complexity and precision of the electrode are guaranteed. After the opening, the electrode (2) can be directly processed by EDM.

[0037] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A mold for processing an open electrode, characterized in that: An upper opening (11) is designed at the upper end of the concave module (1) body, and a lower opening (12) is correspondingly designed at the lower end, so that they are interconnected to form a conical channel (13) for the processed electrode (2) and the molybdenum wire assembly (3) to pass through, and a tapered clamping block (4) for clamping the electrode (2) is installed in the conical channel (13).

2. The mold for machining an open electrode according to claim 1, characterized in that: The upper opening (11) and the lower opening (12) have the same number of opening edges, the concave module (1) corresponds to the number of opening edges of the electrode to be processed (2), and the shape is an equilateral polygon.

3. The mold for machining an open electrode according to claim 1, characterized in that: The conical channel (13) has the same taper as the tapered clamping block (4), and an electrode (2) for processing is clamped inside the tapered clamping block (4), wherein the electrode (2) is a vertical hollow metal tube with equal upper and lower areas.

4. The mold for machining an open electrode according to claim 1, characterized in that: A first electrode clamping hole (411) is provided at the center point of the top surface (41) of the tapered clamping block (4), and a second electrode clamping hole (422) of the same size is provided at the center point of the bottom surface (42) of the tapered clamping block (4), which is connected to the first electrode clamping hole (411) to form a hollow accommodating chamber (43), and the electrode (2) to be processed is located in the accommodating chamber (43).

5. The mold for machining an open electrode according to claim 1, characterized in that: The second electrode clamping hole (422) on the bottom surface (42) of the tapered clamping block (4) is connected to the midpoint of each side through the cutting groove (421).

6. The mold for machining an open electrode according to claim 1, characterized in that: The molybdenum wire assembly (3) is in a cutting groove (421) of the bottom surface (42) of the tapered channel (13).

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