Electric spark punching clamp and electric spark punching equipment

Abstract

The utility model provides an electric spark punching clamp and electric spark punching equipment. The electric spark punching clamp comprises a base; the first positioning assembly is arranged on the base and is suitable for abutting against the annular section in the X-axis direction, the Y-axis direction and the Z-axis direction; the second positioning assembly and the first positioning assembly are oppositely arranged on the base, the second positioning assembly is suitable for abutting against the annular section in the Y-axis direction and the Z-axis direction, an X-axis limiting piece capable of moving in the X-axis direction is arranged on the second positioning assembly, and the second positioning assembly is suitable for abutting against the annular section at the limiting position along the X axis; the third positioning assembly is arranged on the base and suitable for abutting against the annular section in the Y-axis direction, a Z-axis limiting piece capable of moving in the Z-axis direction is arranged on the third positioning assembly, and the third positioning assembly is suitable for abutting against the annular section at the limiting position along the Z axis; and the Y-axis limiting assembly is arranged on the base in an opening and closing mode and is suitable for abutting against the annular section at the limiting position along the Y axis. According to the invention, the position precision requirement of electric spark punching can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electric spark machining, and in particular to an electric spark drilling fixture and an electric spark drilling device. Background Art

[0002] The existing electrospark drilling process generates little resistance, and the processing hole diameter is widely used in the field of precision machining, especially in the machining of workpieces such as blades and gas turbine unit parts. Some of the ring segments of the guard rings need to have cooling holes on planes at different positions and angles. The position accuracy of these cooling holes is very high, and the current flat-nose pliers cannot adapt to the complex structural shape of the ring segment. The workpiece is prone to shaking during drilling, the machining error is large, and the operation is inconvenient during machining, which cannot meet the requirements of mass production. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide an electrospark drilling fixture and an electrospark drilling device that can adapt to the complex structural shape of the annular segment and avoid shaking of the workpiece during processing, thereby ensuring the position accuracy requirements of the electrospark drilling and meeting the requirements of mass production.

[0004] In order to solve the above technical problems, the present invention provides an electric spark drilling fixture and an electric spark drilling device, the electric spark drilling fixture comprising: a base; a first positioning component, the first positioning component is arranged on the base, the first positioning component is suitable for abutting against the annular segment in three directions of the X-axis, the Y-axis and the Z-axis; a second positioning component, the second positioning component is arranged on the base opposite to the first positioning component, the second positioning component is suitable for abutting against the annular segment in two directions of the Y-axis and the Z-axis, and the second positioning component is provided with a A movable X-axis limiter, the X-axis limiter is suitable for abutting against the annular segment at a limit position along the X-axis; a third positioning component, the third positioning component is arranged on the base, the third positioning component is suitable for abutting against the annular segment in the Y-axis direction, and the third positioning component is provided with a Z-axis limiter movable in the Z-axis direction, the Z-axis limiter is suitable for abutting against the annular segment at a limit position along the Z-axis; a Y-axis limiter, the Y-axis limiter is openably arranged on the base, and the Y-axis limiter is suitable for abutting against the annular segment at a limit position along the Y-axis.

[0005] The present disclosure provides an electric spark drilling fixture, which provides a stable support and mounting surface for the first positioning component, the second positioning component, the third positioning component and the Y-axis limiter by setting a base, thereby ensuring the reliability of the drilling process; the first positioning component set on the base can cooperate with other components to position the annular segment in all directions in the three directions of the X-axis, the Y-axis and the Z-axis; by setting the second positioning component to be arranged relative to the first positioning component in the X-axis direction, it can abut against the annular segment in the Y-axis and Z-axis directions, and has a movable X-axis limiter in the X-axis direction , it is possible to loosen or clamp the ring segment in the X-axis direction, so as to facilitate the loading and unloading of the ring segment and adapt to ring segments of different sizes; by making the third positioning component abut against the ring segment in the Y-axis direction, and the third positioning component is provided with a Z-axis limiter movable in the Z-axis direction, the ring segment is provided with accurate Z-axis direction positioning, and the loading and unloading of the ring segment is facilitated; by providing an openable and closable Y-axis limiter on the base, it is possible to abut against the ring segment at the limit position along the Y-axis, thereby realizing the rapid opening and closing operation of the ring segment in the Y-axis direction, and improving the convenience of using the clamp. Therefore, the scheme disclosed in the present invention can stably position the ring segment in all directions in the three directions of X-axis, Y-axis and Z-axis, can adapt to the complex structural shape of the ring segment, avoid the shaking of the workpiece during the processing, thereby ensuring the position accuracy requirements of the electric spark drilling, and at the same time, it is also convenient to load and unload the ring segment in the above three directions, thereby meeting the requirements of mass production.

[0006] Furthermore, the first positioning assembly includes a first bearing block, on which a first X-axis positioning block suitable for abutting against the annular segment in the X-axis direction, a first Y-axis positioning block suitable for abutting against the annular segment in the Y-axis direction, and a first Z-axis positioning block suitable for abutting against the annular segment in the Z-axis direction are detachably provided. By providing the detachable first X-axis positioning block, the first Y-axis positioning block, and the first Z-axis positioning block, they can be quickly replaced according to the actual needs of the external shape of the annular segment to be processed, thereby improving the adaptability and flexibility of the fixture.

[0007] Furthermore, the second positioning assembly includes a second bearing block, on which a second Y-axis positioning block suitable for abutting the ring segment in the Y-axis direction and a second Z-axis positioning block suitable for abutting the ring segment in the Z-axis direction are detachably provided, and the X-axis limiter is provided on the second bearing block. By providing a detachable second Y-axis positioning block and a second Z-axis positioning block, the ring segment can be supported at the end opposite to the first positioning assembly in the X-axis direction; by providing an X-axis limiter, a movable limiter function along the X-axis direction is provided, which facilitates loading and unloading of the ring segment.

[0008] Furthermore, the third positioning assembly includes a third bearing block, on which a third Y-axis positioning block suitable for abutting against the annular segment in the Y-axis direction is arranged, and the Z-axis limiting member is arranged on the third bearing block. By arranging the third Y-axis positioning block, the annular segment can be supported between the first positioning assembly and the second positioning assembly, and the detachable third Y-axis positioning block can adapt to annular segments with different surface shapes; by arranging the Z-axis limiting member, a movable limiting function along the Z-axis direction is provided, which facilitates the loading and unloading of the annular segment.

[0009] Furthermore, the X-axis limiter and the Z-axis limiter are both limiter bolts, the X-axis limiter is threadedly matched with the second bearing block, and the Z-axis limiter is threadedly matched with the third bearing block. The X-axis limiter and the Z-axis limiter use limiter bolts, which are threadedly matched with the corresponding second bearing block and the third bearing block, and have the characteristics of simple structure and easy operation, which not only reduces the production cost of the clamp itself, but also improves the punching efficiency of the annular segment.

[0010] Furthermore, the third positioning component is located between the first positioning component and the second positioning component, and the Y-axis limit component is arranged relative to the third positioning component in the Z-axis direction in the open state. Through the relative arrangement of the Y-axis limit component and the third positioning component in the Z-axis direction, support can be formed in the middle of the annular segment, so that the Y-axis limit component 5 and the third positioning component 4 use the space of the base 1 more compactly, and the installation surface reserved on the base can increase more support for the annular segment; and the pressure acting position of the Y-axis limit component 5 in the closed state and the acting position of the supporting force of the third positioning component are relatively concentrated, providing stable support for the annular segment and enhancing the stability of the clamp.

[0011] Furthermore, the Y-axis limit assembly is a cantilever mechanism, and the cantilever mechanism is provided with a clamping block suitable for abutting the annular segment at the limit position along the Y-axis. The cantilever mechanism has a high rigidity, which can further improve the positioning accuracy and stability of the clamp. In addition, by providing the clamping block, the annular segment can be better fitted and the surface of the annular segment can be prevented from being scratched.

[0012] Furthermore, the cantilever mechanism includes a mounting block, a cantilever and a shift lever, wherein the mounting block is mounted on the base; along the extension direction of the cantilever, one end of the cantilever is hinged to the mounting block, and the other end is provided with a clamping block on the side facing the base; a mounting groove is formed on the mounting block to cooperate with the shift lever in the Y-axis direction, and the shift lever is detachably arranged in the mounting groove, and the side of the cantilever facing away from the base is suitable for abutting against the shift lever at the limited position. By setting a hinge with the mounting block, the cantilever can be opened and closed conveniently, and the shift lever can quickly and accurately limit the cantilever, thereby clamping the annular segment, thereby improving the working efficiency and operation convenience of the clamp.

[0013] Furthermore, along the disassembly direction of the lever, the mounting slot is inclined relative to the base. The inclined mounting slot allows the lever to slide down along the mounting slot to the bottom of the mounting slot and abut against the cantilever by its own weight, and can be self-locked and held in the abutting position by the friction between the lever and the cantilever and / or the mounting slot.

[0014] Furthermore, the clamping block is connected to the cantilever through a lifting bolt, and the lifting bolt is threadedly matched with the cantilever. The clamping block is installed on the lifting bolt of the cantilever, and the height of the clamping block can be fine-tuned through the lifting bolt to adapt to workpieces of more sizes.

[0015] According to another aspect of the present disclosure, an electric spark drilling device is provided, comprising the above-mentioned electric spark drilling fixture.

[0016] Another aspect of the present disclosure provides an electric spark drilling device, which adopts the above-mentioned electric spark drilling fixture. Since the electric spark drilling fixture has the advantages of precise positioning, high stability, and easy disassembly of workpieces, the electric spark drilling device also has good quality in corresponding aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0018] Figure 1 is a schematic diagram of an electric spark drilling fixture according to the present disclosure;

[0019] Figure 2 yes Figure 1 A schematic diagram of the Y-axis limit assembly of the electric spark drilling fixture of the present disclosure in an open state is shown;

[0020] Figure 3 yes Figure 1 A schematic diagram of an electric spark drilling fixture of the present disclosure is shown with a ring segment clamped therein.

[0021] Description of Figure Numbers:

[0022] 1. Base;

[0023] 2. First positioning assembly; 21. First bearing block; 22. First X-axis positioning block;

[0024] 23. First Y-axis positioning block; 24. First Z-axis positioning block;

[0025] 3. Second positioning assembly; 31. X-axis stopper; 32. Second Y-axis positioning block;

[0026] 33. Second Z-axis positioning block; 34. Second bearing block;

[0027] 4. The third positioning assembly; 41. The third Y-axis positioning block; 42. The Z-axis limiter;

[0028] 43. The third bearing block;

[0029] 5. Y-axis limit assembly; 51. mounting block; 52. cantilever;

[0030] 53. gear lever; 54. clamping block; 55. lifting bolt;

[0031] 100. Ring segment. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well.

[0034] Figure 1 It is a schematic diagram of the electric spark drilling fixture according to the present disclosure, showing the structures of the first positioning component 2, the second positioning component 3, the third positioning component 4 and the Y-axis limiting component 5, and their positions on the base 1. Figure 3 yes Figure 1 The schematic diagram of the electric spark drilling fixture of the present disclosure is shown with a ring segment 100. The X-axis, Y-axis and Z-axis shown in the drawings of the present disclosure are only an exemplary coordinate system. In other embodiments, the coordinate system can be rotated arbitrarily, and the X-axis, Y-axis and Z-axis can also be changed accordingly.

[0035] See also Figure 1 and Figure 3According to an electric spark drilling fixture and an electric spark drilling device disclosed in the present invention, the electric spark drilling fixture provided in the present invention includes: a base 1, a first positioning component 2, a second positioning component 3, a third positioning component 4 and a Y-axis limit component 5. The first positioning component 2 is arranged on the base 1, and the first positioning component 2 is suitable for abutting against the ring segment 100 in three directions of the X-axis, the Y-axis and the Z-axis. The second positioning component 3 is arranged on the base 1 opposite to the first positioning component 2 in the X-axis direction, and the second positioning component 3 is suitable for abutting against the ring segment 100 in two directions of the Y-axis and the Z-axis. The second positioning component 3 is provided with an X-axis limiter 31 movable in the X-axis direction, and the X-axis limiter 31 is suitable for abutting against the ring segment 100 at a limit position along the X-axis. The third positioning assembly 4 is arranged on the base 1, and the third positioning assembly 4 is suitable for contacting with the ring segment 100 in the Y-axis direction. The third positioning assembly 4 is provided with a Z-axis stopper 42 movable in the Z-axis direction, and the Z-axis stopper 42 is suitable for contacting with the ring segment 100 at a limit position along the Z-axis. The Y-axis stopper 5 is arranged on the base 1 in an openable and closable manner, and the Y-axis stopper 5 is suitable for contacting with the ring segment 100 at a limit position along the Y-axis; it should be noted that the above-mentioned "openable and closable" means that the Y-axis stopper 5 includes an open state and a closed state, and the Y-axis stopper 5 contacts with the ring segment 100 at a limit position along the Y-axis when in the closed state, and the Y-axis stopper 5 is separated from the ring segment 100 when in the open state.

[0036] For the above-mentioned electric spark drilling fixture, by setting the base 1, a stable support and mounting surface is provided for the first positioning component 2, the second positioning component 3, the third positioning component 4 and the Y-axis limiter 5, thereby ensuring the reliability of the drilling process; the first positioning component 2 arranged on the base 1 can cooperate with other components to perform all-round positioning of the ring segment 100 in three directions of the X-axis, the Y-axis and the Z-axis; by setting the second positioning component 3 and the first positioning component 2 to be arranged relative to each other in the X-axis direction, it can abut against the ring segment 100 in both the Y-axis and the Z-axis directions, and has a movable X-axis limiter 31 in the X-axis direction, which can loosen or clamp the ring in the X-axis direction shaped segment 100, thereby facilitating the loading and unloading of the ring segment 100 and adapting to ring segments 100 of different sizes; by enabling the third positioning component 4 to abut against the ring segment 100 in the Y-axis direction, and providing the third positioning component 4 with a Z-axis limiter 42 movable in the Z-axis direction, accurate Z-axis direction positioning is provided for the ring segment 100, and support can be formed in the middle of the ring segment 100, and the loading and unloading of the ring segment 100 is facilitated; by providing an openable and closable Y-axis limiter 5 on the base 1, it can abut against the ring segment 100 at the limit position along the Y-axis, thereby realizing the rapid opening and closing operation of the ring segment 100 in the Y-axis direction, and improving the convenience of use of the clamp. Therefore, the solution disclosed in the present invention can stably position the annular segment 100 in all directions in the three directions of X-axis, Y-axis and Z-axis, can adapt to the complex structural shape of the annular segment 100, avoid shaking of the workpiece during processing, thereby ensuring the position accuracy requirements of electric spark drilling, and at the same time, it is also convenient to disassemble the annular segment 100 in the above three directions, thereby meeting the requirements of mass production.

[0037] In some specific embodiments, the first positioning assembly 2 includes a first bearing block 21, on which a first X-axis positioning block 22 suitable for abutting against the annular segment 100 in the X-axis direction, a first Y-axis positioning block 23 suitable for abutting against the annular segment 100 in the Y-axis direction, and a first Z-axis positioning block 24 suitable for abutting against the annular segment 100 in the Z-axis direction are detachably provided. The first X-axis positioning block 22, the first Y-axis positioning block 23, and the first Z-axis positioning block 24 can be detachably connected to the first bearing block 21 by means of threaded connection, clamping connection, or magnetic connection, and can use the same connection method or different connection methods. By providing the detachable first X-axis positioning block 22, the first Y-axis positioning block 23, and the first Z-axis positioning block 24, they can be quickly replaced according to the actual needs of the external properties of the workpiece to be processed, thereby improving the adaptability and flexibility of the fixture.

[0038] In such Figure 1 and Figure 3In the illustrated embodiment, optionally, the second positioning assembly 3 includes a second bearing block 34, on which a second Y-axis positioning block 32 suitable for abutting the annular segment 100 in the Y-axis direction and a second Z-axis positioning block 33 suitable for abutting the annular segment 100 in the Z-axis direction are detachably provided, and an X-axis stopper 31 is provided on the second bearing block 34. Similar to the first positioning assembly 2, the second Y-axis positioning block 32 and the second Z-axis positioning block 33 can be detachably connected to the second bearing block 34 by means of threaded connection, clamping connection or magnetic connection, and the same connection method or different connection methods can be used. By providing a detachable second Y-axis positioning block 32 and a second Z-axis positioning block 33, the annular segment 100 can be supported at the end opposite to the first positioning assembly 2 in the X-axis direction; by providing an X-axis stopper 31, a movable function along the X-axis direction is provided, which facilitates the loading and unloading of the annular segment 100.

[0039] More specifically, see Figure 1 and Figure 3 The third positioning assembly 4 includes a third bearing block 43, on which a third Y-axis positioning block 41 suitable for contacting the ring segment 100 in the Y-axis direction is arranged. The third Y-axis positioning block 41 can support the ring segment 100 between the first positioning assembly 2 and the second positioning assembly 3, and the detachable third Y-axis positioning block 41 can adapt to the ring segment 100 with different surface shapes; the Z-axis limiting member 42 is provided to provide a movable limiting function along the Z-axis direction, which is convenient for loading and unloading the ring segment 100.

[0040] Continue to see Figure 1 and Figure 3 , the X-axis limiter 31 and the Z-axis limiter 42 are both limiter bolts, the X-axis limiter 31 is threadedly matched with the second bearing block 34, and the Z-axis limiter 42 is threadedly matched with the third bearing block 43. Optionally, the X-axis limiter 31 and the Z-axis limiter 42 are provided with abutment blocks on one end abutting against the annular segment 100 to avoid scratching the annular segment 100. The X-axis limiter 31 and the Z-axis limiter 42 adopt limiter bolts, which are threadedly matched with the corresponding second bearing block 34 and the third bearing block 43, and have the characteristics of simple structure and easy operation, which not only reduces the production cost of the fixture itself, but also improves the punching efficiency of the annular segment 100. Exemplarily, the axes of the X-axis limiter 31 and the Z-axis limiter 42 are parallel to the horizontal plane, ensuring that the relative positions of the various components remain unchanged during the entire operation process, thereby improving the convenience of loading and unloading operations.

[0041] Preferably, the third positioning assembly 4 is located between the first positioning assembly 2 and the second positioning assembly 3, and the Y-axis limiting assembly 5 is arranged relative to the third positioning assembly 4 in the Z-axis direction in the open state. It should be noted that the above-mentioned "relative arrangement" includes various situations such as the embodiment in which the Y-axis limiting assembly 5 and the third positioning assembly 4 are directly opposite in the Z-axis direction, the embodiment in which part of the Y-axis limiting assembly 5 and the third positioning assembly 4 are opposite in the Z-axis direction, the embodiment in which the Y-axis limiting assembly 5 and part of the third positioning assembly 4 are opposite in the Z-axis direction, and the embodiment in which part of the Y-axis limiting assembly 5 and part of the third positioning assembly 4 are opposite in the Z-axis direction. Through the relative arrangement of the Y-axis limiting assembly 5 and the third positioning assembly 4 in the Z-axis direction, the space utilization of the base 1 by the Y-axis limiting assembly 5 and the third positioning assembly 4 is more compact, and the installation surface is reserved on the base to increase more support for the annular segment; and the pressure acting position of the Y-axis limiting assembly 5 in the closed state and the supporting force acting position of the third positioning assembly 4 are relatively concentrated, providing stable support for the annular segment 100 and enhancing the stability of the fixture.

[0042] Figure 2 yes Figure 1 The schematic diagram of the Y-axis limit assembly 5 of the electric spark drilling fixture disclosed in the present invention in the open state is shown; the open state of an implementation manner of the Y-axis limit assembly 5 is shown.

[0043] exist Figure 2 In the illustrated embodiment, the Y-axis limit assembly 5 is a cantilever mechanism, and a clamping block 54 is provided on the cantilever mechanism, which is suitable for abutting the annular segment 100 at the limit position along the Y-axis. The cantilever mechanism has a high rigidity, which can further improve the positioning accuracy and stability of the clamp. In addition, by providing the clamping block 54, the annular segment 100 can be better fitted, and the surface of the annular segment 100 can be prevented from being scratched. The above-mentioned cantilever mechanism can be an openable and closable hinged structure, or a lifting structure driven by a motor or hydraulics. The cantilever mechanism has a high rigidity, which can further improve the positioning accuracy and stability of the clamp. In addition, by providing the clamping block 54, the annular segment 100 can be better fitted, and the surface of the annular segment 100 can be prevented from being scratched.

[0044] In some further embodiments, the cantilever mechanism includes a mounting block 51, a cantilever 52 and a lever 53, wherein the mounting block 51 is mounted on the base 1; along the extension direction of the cantilever 52, one end of the cantilever 52 is hinged to the mounting block 51, and the other end is provided with a pressing block 54 on the side facing the base 1; a mounting groove is formed on the mounting block 51 to limit the lever 53 in the Y-axis direction, and the lever 53 is detachably arranged in the mounting groove, and the side of the cantilever 52 facing away from the base 1 is suitable for abutting against the lever 53 at the limit position. By setting the hinge with the mounting block 51, the cantilever 52 can be opened and closed conveniently, and the lever 53 can quickly and accurately limit the cantilever 52, thereby pressing the annular segment 100, thereby improving the working efficiency and operation convenience of the clamp.

[0045] In more detail, along the insertion direction of the stopper 53, the mounting groove is tilted toward the base 1. It should be noted that in the above-mentioned embodiment, no matter how the coordinate system is defined, the mounting groove is tilted along the component direction of gravity, and more specifically, at least part of the cantilever 52 has the same inclination angle as the mounting groove. By means of the tilted mounting groove, the stopper 53 can slide down along the mounting groove to the bottom of the mounting groove and abut against the cantilever 52 by relying on its own gravity, and can be self-locked and maintained in the abutting position by virtue of the friction between the stopper 53 and the cantilever 52 and / or the mounting groove.

[0046] In combination Figure 1 , Figure 2 and Figure 3 In the illustrated embodiment, the clamping block 54 is connected to the cantilever 52 via a lifting bolt 55, and the lifting bolt 55 is threadedly engaged with the cantilever 52. Specifically, the clamping block 54 may be mounted on one end of the lifting bolt 55 facing the annular segment 100, and the clamping block 54 may be mounted on the lifting bolt 55 of the cantilever 52, and the height of the clamping block 54 may be fine-tuned via the lifting bolt 55, so as to accommodate workpieces of more sizes or fine-tune the relative position between the clamping block 54 and the annular segment 100 after the cantilever 52 is limited.

[0047] According to another aspect of the present disclosure, an electric spark drilling device is provided, comprising the above-mentioned electric spark drilling fixture.

[0048] The electric spark drilling equipment adopts the above-mentioned electric spark drilling fixture. Since the electric spark drilling fixture has the advantages of accurate positioning, high stability, and easy disassembly of workpieces, the electric spark drilling equipment also has good quality in corresponding aspects.

[0049] The technical effect of the solution disclosed in the present invention is that it can adapt to the complex structural shape of the annular segment, avoid shaking of the workpiece during processing, thereby ensuring the position accuracy requirements of electric spark drilling, and further meeting the requirements of mass production.

[0050] The above are only preferred embodiments of the present disclosure. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present disclosure. These improvements and modifications should also be regarded as the protection scope of the present disclosure.

Claims

1. An electric spark drilling fixture, characterized in that: include: Base (1); A first positioning component (2), the first positioning component (2) being arranged on the base (1), the first positioning component (2) being adapted to abut against the annular segment (100) in three directions: an X-axis, a Y-axis and a Z-axis; a second positioning assembly (3), the second positioning assembly (3) being arranged on the base (1) opposite to the first positioning assembly (2) in the X-axis direction, the second positioning assembly (3) being suitable for abutting against the annular segment (100) in both the Y-axis and Z-axis directions, the second positioning assembly (3) being provided with an X-axis stopper (31) movable in the X-axis direction, the X-axis stopper (31) being suitable for abutting against the annular segment (100) at a stop position along the X-axis; a third positioning assembly (4), the third positioning assembly (4) being arranged on the base (1), the third positioning assembly (4) being adapted to abut against the annular segment (100) in the Y-axis direction, the third positioning assembly (4) being provided with a Z-axis stopper (42) movable in the Z-axis direction, the Z-axis stopper (42) being adapted to abut against the annular segment (100) at a stop position along the Z-axis; A Y-axis limiting component (5), the Y-axis limiting component (5) is arranged on the base (1) in an openable and closable manner, and the Y-axis limiting component (5) is suitable for abutting against the annular segment (100) at a limiting position along the Y-axis.

2. The electric spark drilling fixture according to claim 1, characterized in that: The first positioning assembly (2) comprises a first bearing block (21), on which a first X-axis positioning block (22) suitable for abutting against the annular segment (100) in the X-axis direction, a first Y-axis positioning block (23) suitable for abutting against the annular segment (100) in the Y-axis direction, and a first Z-axis positioning block (24) suitable for abutting against the annular segment (100) in the Z-axis direction are detachably provided.

3. The electric spark drilling fixture according to claim 2, characterized in that: The second positioning assembly (3) comprises a second bearing block (34), on which a second Y-axis positioning block (32) suitable for abutting against the annular segment (100) in the Y-axis direction and a second Z-axis positioning block (33) suitable for abutting against the annular segment (100) in the Z-axis direction are detachably provided, and the X-axis limiter (31) is provided on the second bearing block (34).

4. The electric spark drilling fixture according to claim 3, characterized in that: The third positioning assembly (4) comprises a third bearing block (43), on which a third Y-axis positioning block (41) suitable for abutting against the annular segment (100) in the Y-axis direction is arranged, and the Z-axis limiting member (42) is arranged on the third bearing block (43).

5. The electric spark drilling fixture according to claim 4, characterized in that: The X-axis limiting component (31) and the Z-axis limiting component (42) are both limiting bolts; the X-axis limiting component (31) is threadedly matched with the second bearing block (34); and the Z-axis limiting component (42) is threadedly matched with the third bearing block (43).

6. The electric spark drilling fixture according to claim 1, characterized in that: The third positioning assembly (4) is located between the first positioning assembly (2) and the second positioning assembly (3), and the Y-axis limiting assembly (5) is arranged opposite to the third positioning assembly (4) in the Z-axis direction in the open state.

7. The electric spark drilling fixture according to any one of claims 1 to 6, characterized in that: The Y-axis limiting assembly (5) is a cantilever mechanism, on which a pressing block (54) is provided that is suitable for abutting against the annular segment (100) at a limiting position along the Y-axis.

8. The electric spark drilling fixture according to claim 7, characterized in that: The cantilever mechanism comprises a mounting block (51), a cantilever (52) and a shifting rod (53); the mounting block (51) is mounted on the base (1); along the extension direction of the cantilever (52), one end of the cantilever (52) is hinged to the mounting block (51), and the other end is provided with a clamping block (54) on the side facing the base (1); a mounting groove is formed on the mounting block (51) and is limitedly matched with the shifting rod (53) in the Y-axis direction; the shifting rod (53) is detachably arranged in the mounting groove, and the side of the cantilever (52) facing away from the base (1) is suitable for abutting against the shifting rod (53) at the limited position.

9. The electric spark drilling fixture according to claim 8, characterized in that: Along the disassembly direction of the shift rod (53), the installation groove is arranged obliquely relative to the base (1).

10. The electric spark drilling fixture according to claim 8, characterized in that: The pressing block (54) is connected to the cantilever (52) via a lifting bolt (55), and the lifting bolt (55) is threadedly matched with the cantilever (52).

11. An electric spark drilling device, characterized in that: It comprises the electric spark drilling fixture as described in any one of claims 1 to 10.

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