Electrode holder for electrospark flank machining

Abstract

The utility model discloses an electrode holder for electric spark lateral processing, including electrode holder body, be equipped with the boss for making electrode in-depth mould part on electrode holder body, the head side of boss is equipped with the connecting structure for installing electrode and the fixed structure for fixing electrode, and the connecting structure is the recess structure along the extension of boss head side, and the fixed structure is the hole -like structure through the boss head side and with the connecting structure intercommunication. Through the electrode holder makes electrode only needs once setting processing, need not twice, three times even five -axis processing, has saved lateral processing electrode cost, and through simplifying electrode processing procedure, cooperation boss head's dovetail groove and pin through -hole, has reduced the size deviation in processing process, has reduced the part rejection rate and the bad rate because of electrode processing difficulty.

Description

Technical Field

[0001] This utility model relates to the field of electrical discharge machining technology, specifically to an electrode holder for lateral electrical discharge machining. Background Technology

[0002] In the machining process of mold parts, many parts require side-direction EDM machining due to product shape issues. Due to the electrode orientation problem, side-direction machining electrodes need to be set up and milled multiple times, at least twice, and sometimes three or four times, or even requiring milling with a five-axis machining center. For example, normal electrode machining only requires one setting and milling downwards in the Z direction, but side-direction EDM electrodes require at least one downward machining in the Z direction, then the electrode is flipped over and set up again, and the side is milled again. Some shapes need to be flipped over and milled again. Therefore, side-direction machining electrodes have relatively low electrode dimensional accuracy, poor relative dimensions, and are prone to machining problems. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides an electrode holder for lateral electrical discharge machining.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An electrode holder for electrical discharge machining includes an electrode holder body, a boss for inserting the electrode into the mold part, and a connecting structure for mounting the electrode and a fixing structure for fixing the electrode on the side of the head of the boss. The connecting structure is a groove structure extending along the side of the boss head, and the fixing structure is a hole-like structure that penetrates the side of the boss head and is connected to the connecting structure.

[0005] Furthermore, the connection structure is a dovetail groove, the cross-section of which is an isosceles trapezoid, and its opening width is smaller than the bottom width. The electrode is provided with a dovetail shape that matches the dovetail groove, and the dovetail shape and the dovetail groove achieve a tight fit through surface contact.

[0006] Furthermore, the dovetail groove extends along the length of the side of the boss head, with its two ends penetrating the two end faces of the boss head respectively, forming a through structure.

[0007] Furthermore, the fixing structure is a cylindrical pin through hole with its axis perpendicular to the extension direction of the connecting structure. A pin that is interference-fitted with the hole wall is disposed in the pin through hole. After the pin passes through the pin through hole, it abuts against the side of the electrode to achieve fixing.

[0008] Furthermore, the number of pin through holes is at least one, and they are spaced apart along the extension direction of the connecting structure.

[0009] Furthermore, the boss and the electrode base body are an integral structure.

[0010] Furthermore, a support column is provided on the end face of the electrode holder body away from the boss.

[0011] This invention offers the following advantages: The electrode holder for lateral EDM provided by this invention requires only one electrode setup and machining, eliminating the need for secondary, tertiary, or even five-axis machining, thus saving on lateral machining electrode costs. Furthermore, by simplifying the electrode machining process and utilizing the dovetail groove and pin through-hole of the boss head, dimensional deviations during machining are reduced, lowering the scrap and defect rates of parts caused by difficulties in electrode machining. In addition, electrodes can be batch-machined and directly installed into the electrode holder for use after machining. Moreover, if the electrode wears out during EDM, the pin can be quickly removed to replace the electrode head, making operation quick and simple, saving machining and replacement time. Attached Figure Description

[0012] Figure 1 This is an assembly diagram of the present invention; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the electrode structure in this utility model; Figures 1 to 3 The reference numerals in the attached drawings are respectively: 1-electrode holder body, 2-electrode, 3-bore, 4-dovetail groove, 5-pin through hole, 6-pin, 7-support column. Detailed Implementation

[0013] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0014] like Figures 1 to 3 As shown, an electrode holder for electrical discharge machining includes an electrode holder body 1. The electrode holder body 1 is provided with a boss 3 for inserting an electrode 2 into a mold part. The head side of the boss 3 is provided with a connecting structure for mounting the electrode 2 and a fixing structure for fixing the electrode 2. The electrode holder body 1 serves as the basic load-bearing structure for the entire electrode holder 2, providing stable support for the boss 3. It is the main frame of the electrode holder 2, ensuring the structural stability of the entire device during electrical discharge machining. The boss 3 and the electrode holder body 1 are an integral structure. This integral structure (such as one-piece molding) ensures that there are no splicing gaps between them, that the materials are consistent, and that the structure is more rigid. By eliminating connection gaps and reducing assembly errors, relative displacement or deformation between the boss 3 and the body due to vibration, stress, or other factors during electrical discharge machining is avoided.

[0015] A support column 7 is provided on the end face of the electrode holder body 1 away from the boss 3. The support column 7, in cooperation with the processing equipment, fixes the electrode holder 2 as a whole in the preset processing position, ensuring that the electrode 2 and the lateral processing surface of the mold part are in the correct relative position. In addition, the support column 7 can disperse the impact force and vibration generated during the processing, preventing the electrode holder body 1 from tilting or displacing due to uneven force, further ensuring the stability of the electrical discharge machining between the electrode 2 and the mold part.

[0016] The boss 3 is 50mm long. Its main function is to enable the electrode 2 installed on it to penetrate into the mold part, meet the requirements of the depth of the electrode 2 for electrical discharge machining, and solve the problem that conventional electrodes 2 are difficult to penetrate into the part for lateral machining.

[0017] Electrode 2, as the actuator of electrical discharge machining, generates electrical spark discharge with the mold parts during the machining process, realizing the lateral machining of the parts. It only needs to be set to machining downwards in the Z direction once. After machining, it is connected to the electrode 2 holder through a dovetail structure, and can be easily replaced when worn out.

[0018] The connecting structure is a groove extending along the side of the head of the boss 3. This connecting structure, located on the side of the head of the boss 3, is used to achieve precise installation and positioning of the electrode 2 and the boss 3. Specifically, the connecting structure is a dovetail groove 4. The cross-section of the dovetail groove 4 is an isosceles trapezoid, with its opening width smaller than the bottom width. The electrode 2 has a dovetail shape that matches the dovetail groove 4. The dovetail shape and the dovetail groove 4 achieve a tight fit through surface contact. The dovetail groove 4 extends along the length of the side of the head of the boss 3, with its two ends penetrating the two end faces of the head of the boss 3, forming a through-type structure. This through-type structure facilitates the insertion of the electrode 2 from either end of the dovetail groove 4 for assembly, simplifying the assembly process, and is particularly suitable for the installation of electrodes 2 in batch processing. Simultaneously, the through-type structure also facilitates the processing and inspection of the dovetail shape of the dovetail groove 4 and the electrode 2, reducing manufacturing difficulty and helping to ensure the fitting accuracy of both.

[0019] After machining, electrode 2 is wire-cut to form a dovetail shape that matches the dovetail groove 4. This fits together to ensure electrode 2 is accurately installed in the preset position on boss 3, guaranteeing the installation accuracy of electrode 2. The machined electrode 2 is then positioned and installed by fitting its dovetail shape into the dovetail groove 4 on the side of the head of boss 3. Subsequently, pin 6 is inserted into pin through hole 5, and pin 6 abuts against the side of electrode 2, completing the fixation of electrode 2 and ensuring it is securely mounted on the electrode 2 holder.

[0020] The dovetail groove 4 has an isosceles trapezoidal cross-section, with the opening width being smaller than the bottom width. The electrode 2, which mates with it, has a matching dovetail shape at its tail. This "narrow opening and wide bottom" structure provides mechanical restraint. When the dovetail shape of the electrode 2 is embedded in the dovetail groove 4, the trapezoidal sides fit together, limiting the displacement of the electrode 2 in the direction perpendicular to the extension of the groove. This prevents the electrode 2 from falling off or shifting due to force during processing, ensuring the stability of the assembly.

[0021] Furthermore, the dovetail shape and the dovetail groove 4 achieve a tight fit through surface contact. Compared to point contact or line contact, surface contact increases the contact area, making the force on electrode 2 more uniform and reducing deformation caused by local stress concentration. At the same time, surface contact ensures the positioning accuracy of electrode 2 during assembly, ensuring that the machining direction of electrode 2 is consistent with the preset direction, thereby improving the dimensional accuracy of electrical discharge machining and avoiding part machining defects caused by positioning deviation of electrode 2.

[0022] The fixing structure is a hole-like structure that penetrates the side of the head of the boss 3 and communicates with the connecting structure. Specifically, the fixing structure is a cylindrical pin through-hole 5, the axis of which is perpendicular to the extension direction of the connecting structure. A pin 6 is arranged in the pin through-hole 5, which is interference-fitted with the hole wall. After the pin 6 passes through the pin through-hole 5, it abuts against the side of the electrode 2 to achieve fixation. There is at least one pin through-hole 5, which is distributed at intervals along the extension direction of the connecting structure. The pin through-hole 5 is opened on the side of the head of the boss 3 and communicates with the dovetail groove 4. The pin 6 is assembled in the pin through-hole 5 to firmly fix the electrode 2 installed in the dovetail groove 4. After the electrode 2 is installed in place, the pin 6 passes through the pin through-hole 5 and abuts against the electrode 2 to prevent the electrode 2 from shifting due to vibration or other reasons during processing, thus ensuring processing stability.

[0023] Additionally, it should be noted that components not described in detail in this article are existing technologies.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An electrode holder for lateral electrical discharge machining, characterized in that, The electrode base body (1) is provided with a boss (3) for inserting the electrode (2) into the mold part. The head side of the boss (3) is provided with a connection structure for mounting the electrode (2) and a fixing structure for fixing the electrode (2). The connecting structure is a groove structure extending along the side of the head of the boss (3), and the fixing structure is a hole-like structure that penetrates the side of the head of the boss (3) and is connected to the connecting structure.

2. The electrode holder for lateral electrical discharge machining according to claim 1, characterized in that, The connection structure is a dovetail groove (4). The cross-section of the dovetail groove (4) is an isosceles trapezoid, and its opening width is smaller than the bottom width of the groove. The electrode (2) is provided with a dovetail shape that matches the dovetail groove (4). The dovetail shape and the dovetail groove (4) are closely matched through surface contact.

3. The electrode holder for lateral electrical discharge machining according to claim 2, characterized in that, The dovetail groove (4) extends along the length of the side of the head of the boss (3), and its two ends penetrate the two end faces of the head of the boss (3) to form a through structure.

4. The electrode holder for lateral electrical discharge machining according to claim 1, characterized in that, The fixing structure is a cylindrical pin through hole (5), the axis of which is perpendicular to the extension direction of the connecting structure, and a pin (6) that is interference fit with the hole wall is arranged in the pin through hole (5). After the pin (6) passes through the pin through hole (5), it abuts against the side of the electrode (2) to achieve fixation.

5. The electrode holder for lateral electrical discharge machining according to claim 4, characterized in that, The number of pin through holes (5) is at least one, and they are distributed at intervals along the extension direction of the connecting structure.

6. The electrode holder for lateral electrical discharge machining according to claim 1, characterized in that, The boss (3) and the electrode base body (1) are an integral structure.

7. The electrode holder for lateral electrical discharge machining according to claim 1, characterized in that, A support column (7) is provided on the end face of the electrode base body (1) away from the boss (3).

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