Blade clamp and device for electric discharge machining

Abstract

The application discloses a processing method of a tool setting plate, the tool setting plate, a blade clamp for electric spark machining and equipment, and comprises the following steps: S1, processing the tool setting plate according to the included angle alpha between the slotted end face of a blade rim plate and the groove depth direction of a sealing groove; S2, processing a tool setting groove, and the included angle between the groove depth direction of the tool setting groove and an inclined plate is equal to alpha; S3, processing a step, and reserving half of the profile of the tool setting groove along the groove length direction as the kick surface of the step; S4, performing contact scanning on the kick surface by using a measuring head, obtaining the profile and position parameters of half of the tool setting groove, and judging whether the profile and position parameters meet the error requirement; and S5, detecting the groove width of the tool setting groove by using a measuring rod, judging whether the profile and position parameters of the other half of the tool setting groove meet the error requirement; the tool setting plate can accurately detect the shape and position parameters of the tool setting groove, so that the tool setting plate used for electric spark machining of the sealing groove can meet the shape and position error requirement of the tool setting groove, and the alignment problem of special-shaped electrodes is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engines, in particular, to a method for processing a tool setting plate. In addition, the present application also relates to a tool setting plate obtained by the method for processing a tool setting plate. The present application also relates to an electro-discharge machining blade clamp comprising the tool setting plate. The present application also relates to an electro-discharge machining device comprising the electro-discharge machining blade clamp. BACKGROUND

[0002] When engine blades are assembled, a sealing metal sheet is installed to eliminate the gap between the upper and lower edge plates of two adjacent turbine guide vanes, prevent high-temperature and high-pressure gas flow from leaking, and is called a sealing sheet. The groove on the upper and lower edge plates of the turbine guide vane for installing the sealing sheet is called a sealing groove, and the structural feature of the sealing groove is that the size is narrow and small and the precision requirement is high.

[0003] As shown in Figure 1 , Figure 2 and Figure 3 , there are 4-6 sealing grooves 103 for installing sealing strips on the basin and back end faces of the high and low pressure turbine guide vane edge plates 101 of a certain type of engine; the groove width of the sealing groove 103 is 0.60 +0.1 mm, the groove depth is 2±0.1mm, and the positional accuracy requirement is (0.2-0.3)mm. Since the profile of the sealing groove 103 is complex and the guide vane is made of an alloy with excellent high-temperature strength and hardness, its cutting performance is very poor, and it is difficult to meet the size requirements by using ordinary mechanical cutting methods. Therefore, electro-discharge forming machining method is adopted. When electro-discharge forming machining is performed, if an electrode is used to process the sealing groove 103 in sections, the electrode needs to be frequently replaced, and after each replacement, electrode setting operation needs to be performed using a tool setting plate provided with a tool setting groove. This processing method has low efficiency and frequent tool setting is prone to errors. Therefore, using a special-shaped electrode that is adapted to the shape of the sealing groove 103 for processing can reduce the number of electrode setting operations, thereby improving the processing efficiency and reducing errors.

[0004] The tool setting groove on the tool setting plate needs to be accurately detected for its shape and positional error to ensure accurate and reliable tool setting. As shown in Figure 2As shown, since the slotted end face of the blade edge plate 101 of the blade 100 is at an angle α with the groove depth direction of the sealing groove 103, the angle between the groove depth direction of the tool setting groove and the tool setting plate is also α; when the universal tool microscope is used to detect the tool setting groove, if the tool setting plate is placed vertically to the lens, the groove depth direction of the tool setting groove is at an angle α with the projection direction, and the complete profile of the tool setting groove cannot be projected, so the detection cannot be successfully carried out; if the groove depth direction of the tool setting groove is parallel to the projection direction, the profile of the tool setting groove is on the inclined tool setting plate, so the lens cannot be focused (if focused on the upper section of the tool setting groove, the lower section of the tool setting groove is blurred; if focused on the lower section of the tool setting groove, the upper section of the tool setting groove is blurred), so the detection cannot be successfully carried out; if a contact type measuring instrument is used to detect the tool setting groove, since the groove width of the tool setting groove is small, the measuring head is difficult to extend into the tool setting groove, so the detection cannot be successfully carried out. In summary, the shape and position of the tool setting groove on the tool setting plate are difficult to verify the machining precision, and the tool setting plate without detection is used in the EDM machining, which may affect the machining precision of the sealing groove, and even cause the blade 100 to be scrapped. SUMMARY

[0005] The present application provides a tool setting plate machining method to solve the technical problem that when the slotted end face of the blade edge plate is at an angle α with the groove depth direction of the sealing groove, the angle between the groove depth direction of the tool setting groove and the tool setting plate is also α, the shape and position error of the tool setting groove are difficult to accurately detect when the sealing groove of the special-shaped blade is machined by EDM, and the special-shaped electrode is difficult to be aligned.

[0006] According to one aspect of the present application, a tool setting plate machining method is provided, comprising the following steps:

[0007] S1, machining the tool setting plate: machining the tool setting plate according to the angle α between the slotted end face of the blade edge plate and the groove depth direction of the sealing groove, the tool setting plate comprising a mounting plate and an inclined plate, the angle β between the mounting plate and the inclined plate being 90°-α;

[0008] S2, machining the tool setting groove: machining the tool setting groove on the inclined plate according to the parameters of the sealing groove, the angle between the groove depth direction of the tool setting groove and the inclined plate being equal to α;

[0009] S3, machining the step: machining the step on the inclined plate, and retaining half of the profile of the tool setting groove along the groove length direction as the kick surface of the step;

[0010] S4, position detection of the tool setting groove: contact scanning of the kick surface is carried out by using a measuring head, the profile and position parameters of half of the tool setting groove are obtained, and it is judged whether the profile and position parameters meet the error requirement;

[0011] S5, groove width detection of the tool setting groove: the groove width of the tool setting groove is detected by using a measuring rod, and it is judged whether the profile and position parameters of the other half of the tool setting groove meet the error requirement.

[0012] Further, in the step S3, each tool setting groove is machined with at least one level of step.

[0013] Further, in the step S3, the height h of each level of step ranges from 2mm to 5mm.

[0014] Further, in the step S2, the tool setting plate is provided with a clearance groove for machining the tool setting groove.

[0015] According to another aspect of the present application, there is also provided a tool setting plate obtained by the tool setting plate machining method as described above.

[0016] The present application also provides an electrical discharge machining blade clamp comprising the tool setting plate as described above, wherein the tool setting plate is arranged on a vertical plate, the vertical plate is arranged on a base, the vertical plate is provided with a clamping mechanism for clamping a blade, the tool setting plate comprises a mounting plate and an inclined plate, and the clamping mechanism clamps the blade so that the slotted end surface of the blade rim plate is arranged in parallel with the inclined plate.

[0017] Further, the blade rim plate is provided with a positioning groove, the clamping mechanism comprises a positioning plate for supporting the blade rim plate, a radial positioning assembly for defining the radial position of the blade rim plate, and a pressing plate assembly for defining the axial position of the blade rim plate, the two pressing plate assemblies are arranged oppositely, the radial positioning assembly comprises an angular positioning block arranged on the positioning plate and adapted to the positioning groove, and a positioning bolt arranged oppositely to the angular positioning block, the positioning bolt is at least two, and the pressing plate assembly comprises a supporting bolt arranged on the vertical plate, and a pressing plate arranged on the supporting bolt and used for pressing the blade rim plate.

[0018] Further, the pressing plate assembly further comprises an adjusting bolt arranged on the vertical plate, a spring sleeved on the adjusting bolt, and a locking nut screwed on the adjusting bolt, the pressing plate is provided with a waist-shaped slot for passing through the adjusting bolt, the spring is arranged between the vertical plate and the pressing plate, the pressing plate is arranged between the locking nut and the spring, and the supporting bolt is in sliding connection with the pressing plate.

[0019] Further, the top surface of the vertical plate is provided with a positioning pin for positioning the mounting plate, and a rectangular head screw for locking the mounting plate, the mounting plate is provided with a positioning hole adapted to the positioning pin, and a clearance groove for passing through the rectangular head screw.

[0020] The present application also provides an electrical discharge machining device comprising the electrical discharge machining blade clamp as described above.

[0021] The present application has the following beneficial effects:

[0022] The tool setting plate processing method of the present application forms a step on the inclined plate, retains half of the profile of the tool setting groove along the groove length direction as the kick surface of the step, thereby providing a contact surface for the contact type scanning detection of the measuring head of the three-coordinate detection equipment; according to the detection data of the side profile, the groove width size detected by the feeler gauge or block gauge is comprehensively used, so that the shape and position parameters of all the tool setting grooves to be detected can be obtained; when the groove depth direction of the tool setting groove is at an angle α with the inclined plate, the tool setting plate can be precisely detected in shape and position parameters when the tool setting plate is processed by the method, so that the tool setting plate used for the spark-erosion machining sealing groove can meet the shape and position error requirements of the tool setting groove, thereby solving the alignment problem of the special-shaped electrode.

[0023] In addition to the objects, features, and advantages described above, the present application has other objects, features, and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate embodiments of the application and assist in

[0025] Figure 1 is a structural schematic view of a guide vane of a certain type of engine according to the preferred embodiment of the present application;

[0026] Figure 2 is a structural schematic view of a guide vane of a certain type of engine according to the preferred embodiment of the present application; Figure 1 is a sectional view along the A-A direction shown in FIG. 1;

[0027] Figure 3 is a structural schematic view of a guide vane of a certain type of engine according to the preferred embodiment of the present application;

[0028] Figure 4 is a structural schematic view of a tool setting plate according to the preferred embodiment of the present application;

[0029] Figure 5 is a structural schematic view of a step according to the preferred embodiment of the present application;

[0030] Figure 6 is a structural schematic view of a vane clamp for spark-erosion machining according to the preferred embodiment of the present application;

[0031] Figure 7 is a structural schematic view of a vane clamp for spark-erosion machining according to the preferred embodiment of the present application;

[0032] Figure 8 is a structural schematic view of a vertical plate according to the preferred embodiment of the present application;

[0033] Figure 9 is a structural schematic view of a positioning groove according to the preferred embodiment of the present application;

[0034] Figure 10 is a structural schematic diagram of a radial positioning assembly of a preferred embodiment of the present application;

[0035] Figure 11 is a structural schematic diagram of a pressing plate assembly of a preferred embodiment of the present application;

[0036] Figure 12 is a structural schematic diagram of a sliding block of a preferred embodiment of the present application.

[0037] Legend:

[0038] 100, blade; 101, blade edge plate; 102, positioning groove; 103, sealing groove; 1, base; 2, vertical plate; 21, positioning pin; 22, oblong head screw; 3, tool setting plate; 31, mounting plate; 311, positioning hole; 312, avoidance groove; 32, inclined plate; 321, tool setting groove; 3211, first long groove; 3212, first short groove; 3213, second long groove; 3214, second short groove; 322, step; 3221, first step; 3222, second step; 323, avoidance groove; 4, clamping mechanism; 41, positioning plate; 42, radial positioning assembly; 421, angular positioning block; 422, positioning bolt; 43, pressing plate assembly; 431, support bolt; 432, pressing plate; 433, adjusting bolt; 434, spring; 435, locking nut; 436, sliding block; 437, sliding groove. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the following.

[0040] As shown in Figure 4 , the tool setting plate processing method of the present embodiment includes the following steps:

[0041] S1, processing tool setting plate: processing tool setting plate 3 according to the included angle a of the slotted end face of blade edge plate 101 and the groove depth direction of sealing groove 103, tool setting plate 3 includes mounting plate 31 and inclined plate 32, the included angle β of mounting plate 31 and inclined plate 32 = 90°-a;

[0042] S2, processing tool setting groove: processing tool setting groove 321 on inclined plate 32 according to the parameters of sealing groove 103, the included angle of the groove depth direction of tool setting groove 321 and inclined plate 32 is equal to a;

[0043] S3, processing step: processing step 322 on inclined plate 32, retaining half of the profile of tool setting groove 321 along the groove length direction as the kick surface of step 322;

[0044] S4, position detection of the tool setting groove: the measuring head is used to contact scanning of the kick surface to obtain the profile and position parameters of one half of the tool setting groove 321, and to determine whether the profile and position parameters meet the error requirement;

[0045] S5, groove width detection of the tool setting groove: the gauge rod is used to detect the groove width of the tool setting groove 321 to determine whether the profile and position parameters of the other half of the tool setting groove 321 meet the error requirement.

[0046] The tool setting plate processing method of the embodiment provides a contact surface for the contact scanning detection of the measuring head of the three-coordinate detection equipment by processing the step 322 on the inclined plate 32 to retain one half of the tool setting groove 321 along the groove length direction as the kick surface of the step 322; according to the detection data of the side surface, the groove width size detected by the gauge rod or block gauge is comprehensively used to obtain the shape and position parameters of the tool setting groove 321 that need to be detected. When the groove depth direction of the tool setting groove 321 is at an angle a with the inclined plate 32, the method can accurately detect the shape and position parameters of the tool setting groove when processing the tool setting plate, thereby ensuring that the tool setting plate 3 used for the spark-erosion machining sealing groove meets the shape and position error requirements of the tool setting groove 321, and further solving the alignment problem of the special-shaped electrode. Optionally, in step S1, the tool setting plate can be processed by integral casting or stamping. Optionally, in step S3, the inner side surface of the tool setting groove 321 along the groove length direction is retained as the kick surface of the step 322, which can facilitate the extension and retraction of the measuring head of the three-coordinate detection equipment. Optionally, in step S3, the outer side surface of the tool setting groove 321 along the groove length direction is retained as the kick surface of the step 322, which can also meet the extension and retraction of the measuring head of the three-coordinate detection equipment.

[0047] As shown in Figure 4 , Figure 5 , Figure 6 and Figure 10 , in the embodiment, at least one level of step 322 is processed for each tool setting groove 321 in step S3; Figure 10 The right tool setting groove 321 in the middle includes a first long groove 3211 and two first short grooves 3212, the first short grooves 3212 are arranged at an angle with the extension direction of the first long groove 3211, and the first short grooves 3212 are communicated with the end of the first long groove 3211, at this time, the tool setting groove 321 only needs to process one level of step 322; Figure 10The middle left tool setting groove comprises a second long groove 3213 and a second short groove 3214, the second short groove 3214 is arranged at an angle with the extension direction of the second long groove 3213, and the second short groove 3214 is in communication with the middle part of the second long groove 3213, at this time, a first level step 3221 is formed on the second long groove 3213 to retain half of the profile of the second long groove 3213 as a kick surface, and a second level step 3222 is formed on the second short groove 3214 to retain half of the profile of the second short groove 3214 as a kick surface, so as to ensure that the three-coordinate probe head can completely scan half of the profile of the tool setting groove 321.

[0048] As shown in Figure 4 and Figure 5 In the embodiment, the height h of each step 322 in step S3 ranges from 2 to 5 mm; if the height h of the step 322 is less than 2 mm, it is difficult to provide sufficient contact surface for the three-coordinate measuring head, and if the height h of the step 322 is greater than 5 mm, it will lead to an overall thickness of the tool setting plate 3 being too thick when multiple steps 322 need to be machined, which not only increases the material used for the tool setting plate 3, but also increases the cutting workload, resulting in a higher manufacturing cost.

[0049] As shown in Figure 10 In the embodiment, in step S2, the tool setting plate 3 is provided with a clearance groove 323 for machining the tool setting groove 321, which facilitates the threading and tool withdrawal operation during machining, and can avoid the three-coordinate measuring head from being mistakenly touched during detection.

[0050] A tool setting plate obtained by the tool setting plate machining method described above can ensure that the profile and position parameters of the tool setting groove 321 on the tool setting plate 3 meet the error requirements, thereby ensuring accurate and reliable tool setting.

[0051] As shown in Figure 7 A blade clamp for electric spark machining, comprising the tool setting plate 3 described above, the tool setting plate 3 is arranged on a vertical plate 2, the vertical plate 2 is arranged on a base 1, the vertical plate 2 is provided with a clamping mechanism 4 for clamping a blade 100, the tool setting plate 3 comprises a mounting plate 31 and an inclined plate 32, the clamping mechanism 4 clamps the blade 100 so that the slotted end surface of the blade rim plate 101 is arranged in parallel with the inclined plate 32; it can not only solve the problem of finding the special-shaped electrode during machining of the sealing groove 103, but also ensure that the profile and position parameters of the tool setting groove 321 on the tool setting plate 3 meet the error requirements, and ensure accurate tool setting of the special-shaped electrode; during use, the clamping mechanism 4 clamps the blade 100 so that the slotted end surface of the blade rim plate 101 is arranged in parallel with the inclined plate 32, which can be applied to the machining of the sealing groove 103 whose slotted end surface of the blade rim plate 101 is at an angle α with the groove depth direction of the sealing groove 103, and the quality of electric spark machining is stable and reliable. Alternatively, the range of the angle α between the slotted end surface of the blade rim plate 101 and the groove depth direction of the sealing groove 103 is 15 to 75 degrees.

[0052] As Figure 9 , Figure 10 , Figure 11 and Figure 12 shown, in this embodiment, the blade rim plate 101 is provided with a positioning groove 102, the clamping mechanism 4 includes a positioning plate 41 for supporting the blade rim plate 101, a radial positioning assembly 42 for limiting the radial position of the blade rim plate 101, and a pressing plate assembly 43 for limiting the axial position of the blade rim plate 101, the two pressing plate assemblies 43 are oppositely arranged, the radial positioning assembly 42 includes an angular positioning block 421 arranged on the positioning plate 41 and matched with the positioning groove 102, and a positioning bolt 422 oppositely arranged with the angular positioning block 421, the positioning bolt 422 is at least two, the pressing plate assembly 43 includes a supporting bolt 431 arranged on the stand plate 2 and a pressing plate 432 arranged on the supporting bolt 431 for pressing the blade rim plate 101; in use, the two bosses of the positioning plate 41 abut against the two end faces of the blade rim plate 101 respectively, the angular positioning block 421 is clamped into the positioning groove 102, and the outer cylindrical generatrix of the two positioning bolts 422 abuts against the outer circular arc surface of the exhaust edge plate, so as to realize the radial positioning of the blade 100, since the blade rim plate 101 needs to be machined with a sealing groove 103, the radial positioning assembly 42 is a easily-worn part, when the abutting point of the positioning bolt 422 is worn, the positioning bolt 422 can be rotated by 90°, the wear point is moved away in the circumferential direction, and the positioning bolt 422 can continue to be used; the positioning bolt 422 can also be rotated by multiple turns, so that the wear point is moved away in the axial direction, and the positioning bolt 422 can also continue to be used, the two positioning bolts 422 are used for outer circular arc positioning, compared with the positioning by using an arc block, not only the positioning accuracy of the blade 100 can be ensured, but also the machining difficulty of the clamp can be greatly reduced, and the use cost and maintenance cost are saved.

[0053] As Figure 11 and Figure 12 shown, in this embodiment, the pressing plate assembly 43 further includes an adjusting bolt 433 arranged on the stand plate 2, a spring 434 sleeved on the adjusting bolt 433, and a locking nut 435 screwed on the adjusting bolt 433, the pressing plate 432 is provided with a waist-shaped groove for penetrating the adjusting bolt 433, the spring 434 is arranged between the stand plate 2 and the pressing plate 432, the pressing plate 432 is arranged between the locking nut 435 and the spring 434, the supporting bolt 431 is in sliding connection with the pressing plate 432, the top end of the supporting bolt 431 is provided with a sliding block 436, and the bottom surface of the pressing plate 432 is provided with a sliding groove 437 matched with the sliding block 436, so that the pressing plate 432 can move forward and backward and be applicable to clamping blades of different sizes; the spring 434 abuts against the bottom surface of the pressing plate 432, and the pressing plate 432 is fixed by tightening the locking nut 435. Alternatively, the adjusting bolt 433 is screwed with the stand plate 2, and the locking height of the pressing plate 432 can be adjusted by rotating the adjusting bolt 433 in cooperation with the supporting bolt 431.

[0054] AsFigure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, in this embodiment, a positioning pin 21 for positioning the mounting plate 31 and a rectangular head screw 22 for locking the mounting plate 31 are arranged on the top surface of the vertical plate 2. A positioning hole 311 adapted to the positioning pin 21 and an avoidance groove 312 for passing the rectangular head screw 22 are opened on the mounting plate 31; two positioning pins 21 are arranged on the top surface of the vertical plate 2. When assembling the tool setting plate 3, the rectangular head screw 22 is rotated and made parallel to the avoidance groove 312, and the positioning hole 311 is aligned with the positioning pin 21. After the pins 21 are aligned and the rectangular head screw 22 passes through the avoidance groove 312, the rectangular head screw 22 is tightened so that the rectangular head screw 22 forms an angle with the avoidance groove 312 to lock the tool setting plate 3. When removing the tool setting plate 3, the rectangular head screw 22 is rotated and parallel to the avoidance groove 312 to remove the tool setting plate 3. The long strip avoidance groove 312 can reduce the weight of the tool setting plate 3, thereby reducing the difficulty of disassembly and assembly. It has a simple structure, easy operation, accurate positioning, and low processing cost. Optionally, two locating pins 21 are respectively arranged on both sides of the rectangular head screw 22, and correspondingly, two positioning holes 311 are distributed on both sides of the avoidance groove 312. After the tool setting plate 3 is assembled, the positioning effect is better. Optionally, one end of one locating pin 21 that extends into the locating hole 311 has a diamond-shaped pin head. This reduces the contact area, easing the difficulty of hole alignment and making placement and removal smoother. The other end of the locating pin 21 that extends into the locating hole 311 has a cylindrical pin head to ensure accurate positioning of the tool plate 3. If both have diamond-shaped pin heads, the tool plate will have room to move, resulting in inaccurate positioning. Optionally, the ends of both locating pins 21 that extend into the locating hole 311 are chamfered to reduce the difficulty of hole alignment.

[0055] An electric spark machining device comprises the above-mentioned electric spark machining blade fixture.

[0056] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method of processing a knife plate, characterized by, The method comprises the following steps: S1, processing the tool setting plate: according to the included angle α between the slotted end face of the blade edge plate and the groove depth direction of the sealing groove, the tool setting plate is processed, the tool setting plate comprises a mounting plate and an inclined plate, and the included angle β between the mounting plate and the inclined plate is 90°-α; S2, processing the tool setting groove: according to the parameters of the sealing groove, the tool setting groove is processed on the inclined plate, and the included angle between the groove depth direction of the tool setting groove and the inclined plate is equal to α; S3, processing the step: a step is formed on the inclined plate, and half of the profile of the tool setting groove along the groove length direction is reserved as the kick face of the step; S4, position detection of the tool setting groove: the kick face is scanned by a contact type measuring head to obtain the profile and position parameters of half of the tool setting groove, and whether the profile and position parameters meet the error requirement is judged; S5, groove width detection of the tool setting groove: the groove width of the tool setting groove is detected by a measuring rod, and whether the profile and position parameters of the other half of the tool setting groove meet the error requirement is judged.

2. The tool setting plate processing method according to claim 1, wherein in the step S3, at least one level of step is processed for each tool setting groove.

3. The tool setting plate processing method according to claim 2, wherein in the step S3, the height h of each level of step ranges from 2mm to 5mm.

4. The tool setting plate processing method according to claim 1, wherein in the step S2, a clearance groove for processing the tool setting groove is formed on the tool setting plate. The tool setting plate processing method according to any one of claims 1 to 4 is obtained. The tool setting plate (3) according to claim 5 is arranged on a vertical plate (2), the vertical plate (2) is arranged on a base (1), a clamping mechanism (4) for clamping a blade (100) is arranged on the vertical plate (2), the tool setting plate (3) comprises a mounting plate (31) and an inclined plate (32), the clamping mechanism (4) clamps the blade (100) so that the slotted end face of the blade edge plate (101) is arranged in parallel with the inclined plate (32).

7. The electric spark machining blade clamp according to claim 6, wherein a positioning groove (102) is formed on the blade edge plate (101), the clamping mechanism (4) comprises a positioning plate (41) for supporting the blade edge plate, a radial positioning assembly (42) for defining the radial position of the blade edge plate, and a pressing plate assembly (43) for defining the axial position of the blade edge plate, the two pressing plate assemblies (43) are arranged oppositely, the radial positioning assembly (42) comprises an angular positioning block (421) arranged on the positioning plate (41) and matched with the positioning groove (102), and a positioning bolt (422) arranged oppositely with the angular positioning block (421), the positioning bolt (422) is at least two, and the pressing plate assembly (43) comprises a supporting bolt (431) arranged on the vertical plate (2) and a pressing plate (432) arranged on the supporting bolt (431) and used for pressing the blade edge plate (101).

5. A counter blade, characterized in that 8. The electric spark machining blade clamp according to claim 7, wherein 6. An electrode spark machining vane clamp, characterized by ​ ​ ​ ​ The pressing plate assembly (43) further comprises an adjusting bolt (433) arranged on the vertical plate (2), a spring (434) sleeved on the adjusting bolt (433), and a locking nut (435) screwed on the adjusting bolt (433), the pressing plate (432) is provided with a waist-shaped slot for the adjusting bolt (433) to pass through, the spring (434) is arranged between the vertical plate (2) and the pressing plate (432), the pressing plate (432) is arranged between the locking nut (435) and the spring (434), and the supporting bolt (431) is in sliding connection with the pressing plate (432).

9. The electrical discharge machining vane clamp according to claim 6, characterized in that, The top surface of the vertical plate (2) is provided with a positioning pin (21) for positioning the mounting plate (31) and a rectangular head screw (22) for locking the mounting plate (31), and the mounting plate (31) is provided with a positioning hole (311) matched with the positioning pin (21) and an avoidance slot (312) for the rectangular head screw (22) to pass through.

10. An apparatus for electro-discharge machining, characterized by The electrical discharge machining vane clamp according to any one of claims 6 to 9.

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