Electric discharge machining jig

Abstract

The utility model relates to the technical field of horn gate machining, in particular to an electric discharge machining jig. The utility model provides an electric discharge machining jig. The electric discharge machining jig comprises a positioning part, a connecting part, a sleeve locking part, an electrode fixing block and an ox horn electrode. The positioning part is used for being connected with a main shaft of an electric spark machine tool; the connecting part is fixedly connected with the positioning part; the electrode fixing block is detachably and fixedly connected with the connecting part through the sleeve locking part, and the sleeve locking part is configured to lock and fix the electrode fixing block through self rotation; the ox horn electrode is detachably and fixedly connected with the electrode fixing block, and the center line of the ox horn electrode coincides with the axis of the sleeve locking part. The positioning precision can be improved, the universality is high, the productivity can be improved, and the product quality can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of bull horn gate processing, and more specifically, to an electric discharge machining fixture. Background Art

[0002] The horn gate is similar to a bull's horn, has a smooth curve, and is in a cone shape. The cross-sectional diameter of the horn gate gradually decreases from the head end to the tail end, and the tail end of the horn gate is connected to the bottom surface of the cavity.

[0003] In plastic molds, bull horn gates can be divided into integral bull horn gates and flap-type bull horn gates; flap-type bull horn gates are generally formed by splicing two bull horn gate inserts. As the requirements for product appearance continue to increase, integral bull horn gates are gradually used for glue injection.

[0004] The integral bull horn gate is generally processed by an EDM (Electrical Discharge Machining) machine using electrodes. The C-axis of the EDM machine can achieve 360° rotation. When making the integral bull horn gate, the center line of the bull horn electrode is made to be collinear with the C-axis of the EDM machine. The integral bull horn gate is processed on the mold cavity by rotating the C-axis. However, in order to achieve the collinearity of the center line of the bull horn electrode and the C-axis of the EDM machine, a special fixture needs to be designed. However, there are many types of fixtures currently, which lack versatility and affect positioning accuracy.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] The purpose of the embodiments of the present application is to provide a device to solve the technical problem of affecting the positioning accuracy due to the large number of fixtures and lack of versatility when the center line of the bull horn electrode and the C-axis of the EDM machine are colinear.

[0007] To achieve the above purpose, the technical solution adopted in this application is:

[0008] The present application provides an electrical discharge machining tool, which comprises: a positioning portion, a connecting portion, a sleeve locking portion, an electrode fixing block and a bull horn electrode;

[0009] The positioning part is used to connect with the spindle of the electric discharge machining machine;

[0010] The connecting portion is fixedly connected to the positioning portion;

[0011] The electrode fixing block is detachably fixedly connected to the connecting portion through the sleeve locking portion, wherein the sleeve locking portion is configured to lock and fix the electrode fixing block by rotating itself;

[0012] The horn electrode is detachably fixedly connected to the electrode fixing block, and the center line of the horn electrode coincides with the axis of the sleeve locking portion.

[0013] In a possible design, the connection portion includes a mounting block and a connecting column, the mounting block is fixedly connected to the positioning portion, and the connecting column is fixedly connected to the mounting block;

[0014] The sleeve locking portion is detachably fixedly connected to the connecting column.

[0015] In a possible design, the sleeve locking portion includes a rotating sleeve and a tapered sleeve;

[0016] The connecting column is provided with a tapered hole, and a part of the structure of the tapered sleeve extends into the tapered hole;

[0017] The electrode fixing block includes a plug-in column, the plug-in column is inserted into the conical sleeve, and the rotating sleeve is threadedly connected to the connecting column;

[0018] The rotating sleeve is used to gradually extend the tapered sleeve into the tapered hole when rotating relative to the connecting column, so that the tapered sleeve contracts to clamp the plug-in column.

[0019] In a possible design, the conical sleeve includes a frustum portion and a plurality of clamping blocks connected to the frustum portion, and the plurality of clamping blocks are evenly distributed on the annular surface of the frustum portion to form an insertion hole for inserting the insertion column.

[0020] In a possible design, the electrode fixing block further includes a transverse portion and a vertical portion connected to the transverse portion, and a length extension direction of the transverse portion is perpendicular to a length extension direction of the vertical portion;

[0021] The plug-in column is fixedly connected to the transverse portion.

[0022] In a possible design, the horn electrode is detachably fixedly connected to the vertical portion.

[0023] In a possible design, one end of the vertical portion is fixedly connected to the transverse portion, and the other end of the vertical portion has a mounting hole, the bull-horn electrode is inserted into the mounting hole, and the bull-horn electrode and the vertical portion are fixed by fasteners.

[0024] In a possible design, the mounting hole is a polygonal hole or an elliptical hole.

[0025] In a possible design, the positioning portion has a first side surface and a second side surface that are opposite to each other, the first side surface has a mounting groove and a plurality of positioning grooves, and the plurality of positioning grooves are distributed along the circumference of the mounting groove;

[0026] The connecting portion is connected to the second side surface.

[0027] In a possible design, a groove wall of the installation groove is provided with a plurality of stop blocks, and the plurality of stop blocks are distributed along the circumference of the installation groove.

[0028] The beneficial effects of the electric discharge machining fixture provided by the present application are mainly:

[0029] The electric discharge machining jig of the present application is installed on the spindle of the electric discharge machining machine through the positioning part; and the connecting part facilitates the detachable connection between the positioning part and the electrode fixing block, thereby facilitating the replacement of different electrode fixing blocks or bull-horn electrodes, and the center line of the bull-horn electrode coincides with the axis of the sleeve locking part. In this way, after the positioning part is connected to the spindle, the center line of the bull-horn electrode can coincide with the axis of the spindle, which is beneficial to improving the positioning accuracy, and has the characteristics of strong versatility, and is also beneficial to improving productivity and ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is a structural diagram of the zero-point fixture;

[0032] Figure 2 It is a structural schematic diagram of the connection between the electric discharge machining fixture and the zero point fixture provided in the embodiment of the present application;

[0033] Figure 3 is an assembly diagram of an electrical discharge machining jig provided in an embodiment of the present application;

[0034] Figure 4 is an exploded view of an electrical discharge machining jig provided in an embodiment of the present application;

[0035] Figure 5 yes Figure 3 A structural schematic diagram from another perspective;

[0036] Figure 6 It is a structural schematic diagram of the connecting portion in the embodiment of the present application;

[0037] Figure 7 It is a schematic structural diagram of a tapered sleeve in an embodiment of the present application;

[0038] Figure 8 is a schematic structural diagram of a rotating sleeve in an embodiment of the present application;

[0039] Fig. 9 is a schematic structural diagram of an electrode fixing block in an embodiment of the present application;

[0040] Fig.10 It is a schematic diagram of the structure of the horn electrode in the embodiment of the present application.

[0041] Description of main reference numerals:

[0042] 101. Positioning portion; 102. Connecting portion; 103. Sleeve locking portion; 104. Horn electrode; 105. Electrode fixing block; 106. First side surface; 107. Second side surface; 108. Mounting groove; 109. Positioning groove; 110. Stop block; 111. Mounting block; 112. Connecting column; 113. Rotating sleeve; 114. Conical sleeve; 115. Conical hole; 116. Plug-in column; 117. First through hole; 118. Cone portion; 119. Clamping block; 120. Horizontal portion; 121. Vertical portion; 122. Connecting block; 123. Electrode body; 124. Mounting hole; 125. Second through hole; 126. RFID tag; 127. Fastener; 128. Plug-in hole.

[0043] 200, zero point fixture; 201, mounting shaft; 202, positioning pin; 203, limit block. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0046] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In order to illustrate the technical solution described in this application, a detailed description is given below in conjunction with specific drawings and embodiments.

[0049] Combination Figures 1 to 4 As shown, in one or more embodiments, the electric discharge machining fixture provided by the present application includes: a positioning portion 101, a connecting portion 102, a sleeve locking portion 103, an electrode fixing block 105 and a bull horn electrode 104; the positioning portion 101 is used to connect with the spindle of the electric discharge machining machine; the connecting portion 102 is fixedly connected to the positioning portion 101; the electrode fixing block 105 is detachably fixedly connected to the connecting portion 102 through the sleeve locking portion 103, wherein the sleeve locking portion 103 is configured to lock and fix the electrode fixing block 105 by its own rotation; the bull horn electrode 104 is detachably fixedly connected to the electrode fixing block 105, and the center line A of the bull horn electrode 104 coincides with the axis of the sleeve locking portion 103.

[0050] The discharge machining jig of the present application is installed on the spindle of the electric spark machining machine through the positioning part 101; and the connecting part 102 facilitates the detachable connection between the positioning part 101 and the electrode fixing block 105, so as to facilitate the replacement of different electrode fixing blocks 105 or bull horn electrodes 104, and the center line A of the bull horn electrode 104 coincides with the axis of the sleeve locking part 103, so that after the positioning part 101 is connected to the spindle, the center line A of the bull horn electrode 104 can be coincident with the axis of the spindle, which is beneficial to improve the positioning accuracy, and has the characteristics of strong versatility, and is also beneficial to improve productivity and ensure product quality.

[0051] In some embodiments, after the positioning part 101 is connected to the spindle of the EDM machine, the axis of the spindle of the EDM machine coincides with the axis of the sleeve locking part 103. It can be understood by those skilled in the art that a zero-point fixture 200 is installed on the spindle of the EDM machine, and the positioning part 101 of the EDM fixture of the present application needs to be connected to the zero-point fixture 200; the zero-point fixture 200 selects the EROWA zero-point fixture, which is a high-precision flexible quick clamping tool widely used in EDM and mold processing; the zero-point fixture 200 and the positioning part 101 of the present application form a zero-point positioning system to achieve high-precision positioning and reliable clamping.

[0052] See also Figure 4 As shown, in some embodiments, the positioning portion 101 has a first side surface 106 and a second side surface 107 opposite to each other, the first side surface 106 has a mounting groove 108 and a plurality of positioning grooves 109, and the plurality of positioning grooves 109 are distributed along the circumference of the mounting groove 108; the connecting portion 102 is connected to the second side surface 107. In this way, it is convenient to realize the matching of the positioning portion 101 with the zero point fixture 200 on the spindle, realize the reliable connection between the EDM fixture and the spindle, and is easy to locate, further improving the versatility.

[0053] Exemplarily, the positioning portion 101 is in the form of a length-shaped body as a whole, and the edge profiles of the first side surface 106 and the second side surface 107 are substantially square, which is convenient for manufacturing and helps to ensure that the axis of the sleeve locking portion 103 coincides with the axis of the main shaft. The positioning portion 101 and the connecting portion 102 can be fixedly connected by screws. The mounting groove 108 is in the form of a circular blind hole. The axis of the blind hole coincides with the axis of the sleeve locking portion 103. A plurality of positioning grooves 109 are distributed along the groove edge of the mounting groove 108; the number of the positioning grooves 109 can be four; the four positioning grooves 109 are arranged opposite to each other in pairs, so that the four positioning grooves 109 are cross-shaped; of course, the number of the positioning grooves 109 is also two or three, etc., through the positioning groove 109, it is convenient to extend the positioning pin 202 of the zero-point fixture 200 into the positioning groove 109 to achieve positioning; and the mounting groove 108 facilitates the insertion of the mounting shaft 201 of the zero-point fixture into the mounting groove 108, thereby realizing the detachable fixed connection between the zero-point fixture 200 and the positioning part 101.

[0054] See also Figure 5 As shown, in some embodiments, the groove wall of the installation groove 108 is provided with a plurality of stop blocks 110, and the plurality of stop blocks 110 are distributed along the circumference of the installation groove 108, and the stop blocks 110 are abutted against the limit blocks 203 on the installation shaft 201 of the zero-point fixture 200, thereby realizing the connection between the two. Exemplarily, the number of the stop blocks 110 can be four; when the zero-point fixture 200 is connected with the positioning part 101, the positioning pin 202 on the zero-point fixture 200 is directly opposite to the positioning groove 109, and the zero-point fixture 200 has the installation shaft 201 extending into the installation groove 108, and then the installation shaft 201 of the zero-point fixture 200 rotates a certain angle, so that the stop block 110 is abutted against the limit block 203, so that due to the stopping effect of the stop block 110, the limit block 203 cannot be disengaged from the installation groove 108, thereby realizing that the installation shaft 201 cannot be disengaged from the installation groove 108.

[0055] See also Figure 6As shown, in some embodiments, the connecting portion 102 includes a mounting block 111 and a connecting column 112, the mounting block 111 is fixedly connected to the positioning portion 101, and the connecting column 112 is fixedly connected to the mounting block 111; the sleeve locking portion 103 is detachably fixedly connected to the connecting column 112. This makes it easy to replace the positioning portion 101 and the electrode fixing block 105.

[0056] Exemplarily, the mounting block 111 is elongated as a whole, and the surface where the mounting block 111 contacts the second side surface 107 is square, which is convenient for manufacturing and helps to ensure that the axis of the sleeve locking portion 103 coincides with the axis of the main shaft; the mounting block 111 and the positioning portion 101 are detachably fixedly connected by screws; and the connecting column 112 and the mounting block 111 are an integral structure, and the axis of the connecting column 112 passes through the center of the mounting block 111, which makes it easy to achieve the coincidence of the axis of the connecting column 112 with the axis of the sleeve locking portion 103.

[0057] Combination Figure 7 and Figure 8 As shown, in some embodiments, the sleeve locking portion 103 includes a rotating sleeve 113 and a tapered sleeve 114; the connecting column 112 has a tapered hole 115, and part of the structure of the tapered sleeve 114 extends into the tapered hole 115; the electrode fixing block 105 includes a plug-in column 116, the plug-in column 116 is inserted into the tapered sleeve 114, and the rotating sleeve 113 is threadedly connected to the connecting column 112; the rotating sleeve 113 is used to gradually extend the tapered sleeve 114 into the tapered hole 115 when rotating relative to the connecting column 112, so that the tapered sleeve 114 contracts to clamp the plug-in column 116. The cooperation of the rotating sleeve 113 and the tapered sleeve 114 can not only realize the connection between the electrode fixing block 105 and the connecting portion 102, but also ensure the connection strength.

[0058] Exemplarily, the axis of the plug-in column 116 coincides with the axis of the connecting column 112. The shape of the tapered hole 115 is adapted to the outer shape of the tapered sleeve 114, so that when the tapered sleeve 114 gradually extends into the tapered hole 115 under the action of the rotating cylinder, the tapered sleeve 114 can shrink and be clamped by the plug-in column 116, thereby realizing a fixed connection between the plug-in column 116 and the tapered sleeve 114. The cross section of the plug-in column 116 can be circular. The axis of the sleeve locking portion 103 is the axis of the tapered sleeve 114. The axis of the plug-in column 116 coincides with the axis of the sleeve locking portion 103. The rotating sleeve 113 has an internal thread, and the connecting column 112 has an external thread that matches the internal thread on the rotating sleeve 113, so as to realize a detachable fixed connection between the rotating sleeve 113 and the connecting column 112, and when the rotating sleeve 113 is screwed, the tapered sleeve 114 is tightened, and the plug-in column 116 is clamped and fixed by the contraction of the tapered sleeve 114 itself. The rotating sleeve 113 has a first through hole 117, so that the plug-in column 116 can extend into the interior of the rotating sleeve 113 and be inserted into the tapered sleeve 114; the end surface of the tapered sleeve 114 with a larger area abuts against the set surface of the rotating sleeve 113, so that when the rotating sleeve 113 rotates, the tapered sleeve 114 is pressed into the tapered hole 115. The first through hole 117 is located on the set surface of the rotating sleeve 113.

[0059] It is understandable that in some other possible implementations, the cross-section of the plug-in column 116 may also be polygonal, such as a triangle or a rectangle, so as to prevent the plug-in column 116 from rotating relative to the tapered sleeve 114 around the axis of the sleeve locking portion 103 .

[0060] Combination Figure 7 and Figure 8 As shown, in some embodiments, the conical sleeve 114 includes a frustum portion 118 and a plurality of clamping blocks 119 connected to the frustum portion 118. The plurality of clamping blocks 119 are evenly distributed on the annular surface of the frustum portion 118 to form a plug-in hole 128 for inserting the plug-in column 116, which facilitates the contraction of the conical sleeve 114. Exemplarily, the plurality of clamping blocks 119 are arranged at intervals, and there is a gap between two adjacent clamping blocks 119, so that when the conical sleeve 114 is pressed into the conical hole 115, the plurality of clamping blocks 119 can contract toward the axis of the conical sleeve 114 to clamp the plug-in column 116; the frustum portion 118 and the clamping blocks 119 are an integral structure, and the clamping blocks 119 are connected to an annular surface with a larger area of ​​the frustum portion 118. The number of the clamping blocks 119 can be 4 to 8, for example, 4, 6 or 8.

[0061] See also Fig. 9As shown, in some embodiments, the electrode fixing block 105 further includes a transverse portion 120 and a vertical portion 121 connected to the transverse portion 120, and the length extension direction of the transverse portion 120 is perpendicular to the length extension direction of the vertical portion 121; the plug-in column 116 is fixedly connected to the transverse portion 120. This facilitates the connection between the horn electrode 104 and the electrode fixing block 105, and ensures that the center line A of the horn electrode 104 coincides with the axis of the plug-in column 116. Exemplarily, one end of the plug-in column 116 is an integral structure with the transverse portion 120, and the transverse portion 120 is an integral structure with the vertical portion 121, which is convenient for manufacturing.

[0062] In some embodiments, the horn electrode 104 is detachably fixedly connected to the vertical portion 121 , which facilitates replacement of different types of horn electrodes 104 .

[0063] In some embodiments, one end of the vertical portion 121 is fixedly connected to the transverse portion 120, and the other end of the vertical portion 121 has a mounting hole 124, the bull horn electrode 104 is inserted into the mounting hole 124, and the bull horn electrode 104 and the vertical portion 121 are fixed by a fastener 127, thereby achieving detachable fixation between the bull horn electrode 104 and the vertical portion 121.

[0064] See also Fig.10 As shown, for example, the horn electrode 104 has a connection block 122 and an electrode body 123, and the center line A of the electrode body 123 coincides with the axis of the plug-in column 116. The connection block 122 and the electrode body 123 can be an integral structure, and the shape of the cross section of the connection block 122 is adapted to the shape of the mounting hole 124. The fastener 127 can be a pin or a screw.

[0065] In some embodiments, the mounting hole 124 is a polygonal hole or an elliptical hole, so that after the bull-horn electrode 104 is inserted into the mounting hole 124 , the bull-horn electrode 104 will not rotate relative to the mounting hole 124 .

[0066] Exemplarily, the cross-section of the connecting block 122 is a polygonal hole or an elliptical hole, and the polygonal hole can be a rectangular hole; the connecting block 122 is inserted into the mounting hole 124, and the other end of the connecting block 122 and the vertical portion 121 also have a second through hole 125 respectively. In this way, after the connecting block 122 is inserted into the mounting hole 124, the fastener is inserted into the second through hole 125 on the connecting block 122 and the vertical portion 121 to achieve a fixed connection between the bull horn electrode 104 and the vertical portion 121.

[0067] See also Figure 3 As shown, in some embodiments, an RFID tag 126 may be fixed on the connecting portion 102 , and the RFID tag 126 may store information of an applicable horn electrode 104 and information of an applicable zero-point fixture 200 .

[0068] The discharge machining jig of the embodiment of the present application is suitable for the processing of bull horn gates, for example, it is suitable for the processing of integral bull horn gates. It has the characteristics of high repeat positioning accuracy, strong versatility, and the ability to improve production efficiency and product quality, and it is fast to clamp and easy to process. The specific method of using the discharge machining jig provided in the embodiment of the present application is: after connecting the positioning part 101 to the spindle of the electric discharge machining machine, the bull horn electrode 104 is installed on the connecting part 102 through the sleeve locking part 103. When the electric discharge machining machine has a Z axis, the discharge machining jig in the embodiment of the present application can be installed on the Z axis; when the electric discharge machining machine has a Z axis and a C axis, the discharge machining jig in the embodiment of the present application can be installed on the C axis.

[0069] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electrical discharge machining tool, characterized in that: include: Positioning part, connecting part, sleeve locking part, electrode fixing block and horn electrode; The positioning part is used to connect with the main shaft of the electric spark machining machine; The connecting portion is fixedly connected to the positioning portion; The electrode fixing block is detachably fixedly connected to the connecting portion via the sleeve locking portion, wherein the sleeve locking portion is configured to lock and fix the electrode fixing block by rotating itself; The bull-horn electrode is detachably fixedly connected to the electrode fixing block, and the center line of the bull-horn electrode coincides with the axis of the sleeve locking portion.

2. The electric discharge machining tool according to claim 1, characterized in that: The connecting portion includes a mounting block and a connecting column, wherein the mounting block is fixedly connected to the positioning portion, and the connecting column is fixedly connected to the mounting block; The sleeve locking portion is detachably fixedly connected to the connecting column.

3. The electric discharge machining tool according to claim 2, characterized in that: The sleeve locking portion includes a rotating sleeve and a tapered sleeve; The connecting column has a tapered hole, and a portion of the tapered sleeve extends into the tapered hole; The electrode fixing block comprises a plug-in column, the plug-in column is inserted into the conical sleeve, and the rotating sleeve is threadedly connected to the connecting column; The rotating sleeve is used to make the tapered sleeve gradually extend into the tapered hole when rotating relative to the connecting column, so that the tapered sleeve contracts to clamp the plug-in column.

4. The electric discharge machining tool according to claim 3, characterized in that: The conical sleeve comprises a frustum portion and a plurality of clamping blocks connected to the frustum portion, wherein the plurality of clamping blocks are evenly distributed on the annular surface of the frustum portion to form a plug-in hole for inserting the plug-in column.

5. The electric discharge machining tool according to claim 3, characterized in that: The electrode fixing block further comprises a transverse portion and a vertical portion connected to the transverse portion, wherein a length extension direction of the transverse portion is perpendicular to a length extension direction of the vertical portion; The plug-in column is fixedly connected to the transverse portion.

6. The electric discharge machining tool according to claim 5, characterized in that: The horn electrode is detachably fixedly connected to the vertical portion.

7. The electric discharge machining tool according to claim 6, characterized in that: One end of the vertical portion is fixedly connected to the horizontal portion, and the other end of the vertical portion has a mounting hole, the bull-horn electrode is inserted into the mounting hole, and the bull-horn electrode and the vertical portion are fixed by a fastener.

8. The electric discharge machining tool according to claim 7, characterized in that: The mounting hole is a polygonal hole or an elliptical hole.

9. The electric discharge machining tool according to any one of claims 1 to 8, characterized in that: The positioning portion has a first side surface and a second side surface opposite to each other, the first side surface has a mounting groove and a plurality of positioning grooves, and the plurality of positioning grooves are distributed along the circumference of the mounting groove; The connecting portion is connected to the second side surface.

10. The electric discharge machining tool according to claim 9, characterized in that: A plurality of stop blocks are arranged on the groove wall of the installation groove, and the plurality of stop blocks are distributed along the circumference of the installation groove.

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