A fixed tooling applied to wire cut electrical discharge machining

Abstract

The application provides a fixed tooling applied to wire cut electrical discharge machining, comprising a base with a continuous machining track, a first fixed clamp, a positioning clamp and a second fixed clamp; the positioning clamp comprises a fixed seat and a limiting column; when the limiting column is locked to a first set position, the limiting column has a limiting point of the end face of the hard alloy workpiece in the Y-axis direction; when the limiting column is located at a second set position, the limiting column avoids the continuous machining track; the second fixed clamp comprises a pressing plate assembly and an L-shaped limiting block; the L-shaped limiting block is pressed and fixed to the top corner of the hard alloy workpiece. In the application, the X and Y axis directions of the hard alloy workpiece are corrected by the first fixed clamp and the positioning clamp, the correction is accurate, there is no displacement difference when the second fixed clamp is fixed, the continuous machining performance is simultaneously achieved, the production efficiency is improved, and the machining quality is ensured.

Description

Technical Field

[0001] This application relates to the field of wire electrical discharge machining (EDM) technology, and more particularly to a fixture for wire EDM. Background Technology

[0002] Wire electrical discharge machining (EDM) technology is widely used in the processing of large cemented carbide products due to its ability to process materials with extremely high hardness, high precision, and good surface quality. Before processing, the workpiece needs to be placed on the machining table of the wire EDM machine for alignment, positioning, and fixation. The existing fixing method is to align the workpiece parallel to the X-axis of the machining table and perpendicular to the table surface, and then use a pressure strip to fasten the top surface of the workpiece to the machining table.

[0003] The existing method of clamping and securing the workpiece relies solely on the contact between the top surface of the workpiece and the pressure bar. When clamping pressure is applied after the workpiece has been aligned, it is very easy to cause workpiece displacement, which affects the parallelism, perpendicularity, and flatness between the workpiece and the platform. This directly affects the reference datum for subsequent processing, thereby affecting the accuracy of the processing.

[0004] Due to the limitations of wire EDM machines, the workpiece is placed on the crossbeam of the worktable, parallel to the X-axis and secured. When the wire EDM electrode wire is machining the outer contour of the workpiece, interference from the crossbeam prevents continuous machining operations, allowing only single-segment machining. To complete the machining, the electrode wire needs to be disassembled and reassembled multiple times during the process. This repetitive work greatly increases the workload for operators, and frequent disassembly and reassembly can easily alter the contact surface between the electrode wire and the guide roller, causing the original reference position of the electrode wire to become inaccurate. Consequently, the position of the electrode wire relative to the workpiece changes, resulting in a decrease in machining accuracy.

[0005] When performing batch processing operations, each workpiece needs to be clamped, limited, and calibrated before processing, which can easily cause systematic error accumulation, making it difficult to ensure the consistency of the processed workpieces and causing fluctuations in the quality of the processed workpieces.

[0006] In summary, the existing processing methods suffer from low processing accuracy, low processing efficiency, cumbersome operation for workers, poor consistency of processing results, and unstable processing quality. Utility Model Content

[0007] This application provides a fixture for wire electrical discharge machining, which uses a limit clamping method to ensure accurate positioning of the cemented carbide workpiece, and allows for continuous processing, thereby increasing cutting efficiency, ensuring processing accuracy, and improving the accuracy of the cemented carbide workpiece correction and fixation, thus improving processing quality.

[0008] This application provides a fixture for wire EDM, comprising: a fixture for continuously machining cemented carbide workpieces while avoiding a worktable crossbeam; the fixture includes: a base with a continuous machining track, a first fixing clip for limiting the cemented carbide workpiece in the X-axis direction, a positioning clip for positioning the cemented carbide workpiece in the Y-axis direction, and a second fixing clip for pressing and fixing the cemented carbide workpiece; wherein, the first fixing clip includes a plurality of limiters connected to the base; the limiters abut and limit the end face of the cemented carbide workpiece in the X-axis direction; the positioning clip... The components include: a fixed base detachably and fixedly connected to the base; and a limiting post that can be slidably locked at a first set position and a second set position. The limiting post is provided with a scale. When the limiting post is locked to the first set position, it has a limiting point that limits the end face of the cemented carbide workpiece in the Y-axis direction. When the limiting post is located at the second set position, it avoids the continuous machining track. The second fixing member includes: a pressure plate assembly and an L-shaped limiting block slidably connected to the pressure plate assembly. The L-shaped limiting block presses and fixes the top bend of the cemented carbide workpiece.

[0009] In this application, the X and Y axes of the cemented carbide workpiece are corrected and limited by the first fixing clamp and the positioning clamp, enabling the cemented carbide workpiece to be quickly and accurately corrected during machining. Furthermore, the workpiece is prevented from shifting when the second fixing clamp clamps it in place. This eliminates the need for cumbersome correction steps, simplifying the operation and improving efficiency. It ensures that the parallelism, perpendicularity, and flatness of the cemented carbide workpiece are within reasonable ranges, guaranteeing the reference datum for subsequent machining and improving machining quality. Moreover, the continuous machining path reduces the frequent disassembly and assembly caused by interference during electrode wire machining, stabilizing the relative machining position of the electrode wire and further improving machining accuracy and efficiency.

[0010] In one specific implementation, the continuous machining track is an I-shaped machining track formed on the base. After the electrode wire is sequentially passed through the I-shaped machining track and connected to the equipment's guide wheel rotation system, continuous machining of the carbide workpiece contour can be performed.

[0011] In one specific implementation scheme, the base is provided with two machining stations adapted to the continuous machining track, and the cemented carbide workpieces are assembled one-to-one at the two machining stations. After one calibration operation, two cemented carbide workpieces are processed simultaneously and continuously, improving machining efficiency.

[0012] In one specific implementation, the plurality of the limiters limit contact with the mutually facing end faces of the two cemented carbide workpieces. The two cemented carbide workpieces are aligned and positioned in the same direction. During the electrode wire machining process, the electrode wire moves one revolution along the I-shaped machining track, completing the cutting process of the two cemented carbide workpieces.

[0013] In one specific implementation, the pressure plate assembly has a sliding groove, and the L-shaped limiting block is connected to the sliding groove via a locking slider. This allows for the adjustment, clamping, and fixing of cemented carbide workpieces of different sizes.

[0014] In one specific implementation, the second fixing clip further includes an adjusting rod threadedly connected to the base; the adjusting rod passes through the sliding groove and is rotatably connected to the pressure plate assembly. This allows for control and adjustment of the clamping height for different types of cemented carbide workpieces.

[0015] In one specific implementation, the locking slider includes: a slider slidably mounted inside the sliding groove, and a threaded rod threaded through the slider; wherein the end of the threaded rod is rotatably connected to the L-shaped limiting block. The slider has a built-in threaded hole, and the end of the threaded rod is connected to the L-shaped limiting block via a rotatable pin, so that the angle of the cemented carbide workpiece is clamped and fixed when the threaded rod travels along the thread of the slider.

[0016] In one specific implementation, the mounting bracket is connected to the base by screws. This achieves a detachable fixing connection, making cleaning of the overall fixture and replacement of components more convenient.

[0017] In one specific implementation, the fixed base has an adjustment hole for the horizontal sliding of the limiting post, and the fixed base is equipped with a locking screw for locking the limiting post into the adjustment hole. After the cemented carbide workpiece is machined, the limiting post slides horizontally and presses against the end wall of the cemented carbide workpiece in the Y-axis direction, realizing the calibration standard for the next assembly of the cemented carbide workpiece. This, combined with the first fixing clamp positioning the cemented carbide workpiece in the X-axis direction, simplifies the calibration assembly steps and accelerates production efficiency. Attached Figure Description

[0018] Figure 1 A schematic diagram illustrating the usage state of a fixed fixture for wire electrical discharge machining provided in an embodiment of this application; Figure 2 An isometric view of a fixture for wire electrical discharge machining provided in an embodiment of this application; Figure 3 A top view of a fixture for wire electrical discharge machining provided in an embodiment of this application; Figure 4This is a schematic diagram of the structure of the base provided in the embodiments of this application; Figure 5 An exploded view of the fixture used in wire electrical discharge machining provided in the embodiments of this application.

[0019] Icon labels: Lower head -10, worktable -11, wire storage drum -12, electrode wire -13, upper head -14; Fixed fixture-100, base-110, I-shaped machining track-111, positioning clip-120, fixed seat-121, locking screw-122, screw-123, limit post-124, limiter-130, second fixed clip-140, pressure plate assembly-141, adjusting rod-142, L-shaped limit block-143, slider-144, threaded rod-145; Carbide workpiece-200. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of this specification should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar words used in one or more embodiments of this specification do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] To facilitate understanding of the fixture for wire EDM provided in this application embodiment, its application scenario is first explained. Wire EDM technology is widely used in the processing of large cemented carbide products due to its ability to process materials with extremely high hardness, high precision, and good surface quality. Before processing, the workpiece needs to be placed on the machining table of the wire EDM machine tool for calibration, positioning, and fixation. Existing fixing methods involve calibrating the workpiece to be parallel to the X-axis and perpendicular to the table surface, then using a clamping strip to secure the top surface of the workpiece to the machining table. This existing method of clamping and securing the workpiece, relying solely on the contact between the top surface of the workpiece and the clamping strip, easily causes workpiece displacement when applying clamping pressure after calibration. This affects the parallelism, perpendicularity, and flatness between the workpiece and the platform, directly impacting the reference datum for subsequent processing and thus affecting the accuracy of the processing. Due to the limitations of the wire EDM machine tool, the workpiece is placed on the crossbeam of the worktable, parallel to the X-axis and secured. When the wire EDM electrode wire is processing the outer contour of the workpiece, interference from the crossbeam prevents continuous processing, limiting it to single-segment processing. To complete the machining process, the electrode wire needs to be disassembled and reassembled multiple times. This repetitive work greatly increases the workload of operators, and frequent disassembly and reassembly can easily change the contact surface between the electrode wire and the guide wheel, causing the original reference position of the electrode wire to become inaccurate, which in turn causes the position of the electrode wire relative to the workpiece to change, resulting in a decrease in machining accuracy. In batch machining operations, since each workpiece needs to be clamped, limited, and calibrated before machining, it is easy to cause systematic error accumulation, making it difficult to ensure the consistency of machined workpieces and causing fluctuations in workpiece quality. In summary, existing machining methods suffer from low machining accuracy, low machining efficiency, cumbersome operation for operators, poor consistency of machining results, and unstable machining quality. Therefore, this application provides a fixed fixture for wire EDM, which uses limiting clamping to ensure accurate positioning of the cemented carbide workpiece, and allows for continuous machining operations, accelerating cutting efficiency, ensuring machining accuracy, and providing accurate correction and fixation of the cemented carbide workpiece, thus improving machining quality.

[0023] refer to Figure 1As shown in the illustration, the fixed fixture 100 for wire electrical discharge machining provided in this application embodiment is applied to a reciprocating CNC cutting machine tool. The reciprocating CNC cutting machine tool includes an upper head 14 and a lower head 10, and a worktable 11 is provided between the upper head 14 and the lower head 10. At the same time, the wire guiding and stabilizing mechanism cooperates with the upper head 14 and the lower head 10 to circulate and guide the electrode wire 13. When the electrode wire 13 (molybdenum wire or coated wire) runs from top to bottom, the electrode wire 13 starts from the wire storage drum 12 and passes sequentially through the traction power group, the guide group on the upper head 14, and the wire guiding and stabilizing mechanism. In the wire guiding and stabilizing mechanism, the electrode wire 13 passes through the middle wire stabilizing mechanism and is guided, and then enters the lower wire guiding and stabilizing mechanism. After the combined action of the middle wire guiding mechanism and the lower wire guiding mechanism, the electrode wire 13 enters the guide group of the cutting head 10 and enters the waste wire collection drum for recycling, forming a complete set of circulating wire feeding structure. The fixed fixture 100 is fixedly assembled on the worktable 11, and the electrode wire 13 passes through it to perform wire cutting on the cemented carbide workpiece 200.

[0024] The fixture 100 is fixed to the worktable 11 with screws and maintains flatness, perpendicularity and parallelism within 0.002mm. The fixture 100 in this application is used to quickly correct the machining position of the cemented carbide workpiece 200, reduce the amount of correction work, and realize continuous machining operation after avoiding the crossbeam of the worktable 11, reducing the positional deviation caused by frequent disassembly and assembly of the electrode wire 13.

[0025] refer to Figures 2 to 5 As shown, the fixed fixture 100 includes a base 110 with a continuous machining track. The base 110 is connected to the worktable 11 by screws. The continuous machining track enables the single machining of one cemented carbide workpiece 200 or the simultaneous machining of two cemented carbide workpieces 200 after traveling one revolution along the continuous machining track. In this embodiment, it is preferable to calibrate two cemented carbide workpieces 200 at once and perform cutting operations simultaneously, thereby accelerating work efficiency.

[0026] The continuous machining path is an I-shaped machining path 111 set on the base 110. After the electrode wire 13 is passed sequentially through the I-shaped machining path 111 and connected to the equipment's guide wheel rotation system, continuous machining of the contour of the cemented carbide workpiece 200 can be performed. Figure 4As shown, the initial and final positions of the electrode wire 13 are the same, and the arrow direction indicates the movement trajectory of the electrode wire 13. For example, the base 110 is equipped with two processing stations adapted to the continuous processing track, and each of the two processing stations is equipped with a corresponding cemented carbide workpiece 200. After one calibration operation, the two cemented carbide workpieces 200 are processed synchronously to improve processing efficiency. The workpiece moves to the right from the position of the leftmost arrow and enters the vertical cavity of the I-shaped processing track 111. After moving to the top of the vertical cavity, it moves laterally to the left, then folds back to the rightmost end and moves back into the vertical cavity to the bottom. It then bends to the right and returns to the initial position to complete one revolution of cutting. During this cutting process, the corners, the Y-axis end, and part of the cavity of the cemented carbide workpiece 200 are machined and shaped.

[0027] Since the machining amount of the end face of some cemented carbide workpieces 200 in the Y-axis direction is small or no machining is required, the end face of the cemented carbide workpiece 200 in the Y-axis direction is used as the correction and adjustment point in this application; the end face limit of the cemented carbide workpiece 200 in the X-axis direction does not need to be adjusted after the initial measurement and positioning, so the end face of the cemented carbide workpiece 200 in the Y-axis direction can be flexibly adjusted to meet the correction work.

[0028] Specifically, the fixing fixture 100 also includes a first fixing clip for limiting the cemented carbide workpiece 200 in the X-axis direction, a positioning clip 120 for positioning the cemented carbide workpiece 200 in the Y-axis direction, and a second fixing clip 140 for pressing and fixing the cemented carbide workpiece 200. In this application, the first fixing clip and the positioning clip 120 are used to correct and position the cemented carbide workpiece 200 in the X and Y axes, and no displacement deviation should occur when the second fixing clip 140 presses and fixes the cemented carbide workpiece 200. The first fixing clip includes multiple limiters 130 connected to the base 110; the base 110 is provided with multiple adjustment holes for limiting the end wall in the X-axis direction after the cemented carbide workpiece 200 is initially positioned. By adjusting the position of the limiters 130, the limiters 130 are made to fit against the end face of the cemented carbide workpiece 200 in the X-axis direction, providing a reliable standard for correcting and limiting the cemented carbide workpieces 200 in the same batch. Multiple limiters 130 limit the contact between the end faces of the two cemented carbide workpieces 200 facing each other. The two cemented carbide workpieces 200 are aligned and positioned in the same direction. During the machining process of the electrode wire 13, after the electrode wire 13 moves one revolution along the I-shaped machining track 111, the cutting process of the two cemented carbide workpieces 200 is completed.

[0029] refer to Figure 5As shown, the positioning clip 120 includes: a fixed base 121 detachably fixedly connected to the base 110; and a limiting post 124 that can slide and lock into a first set position and a second set position. The limiting post 124 is provided with a scale. When the limiting post 124 is locked to the first set position, it has a limiting point on the end face of the cemented carbide workpiece 200 in the Y-axis direction. When the limiting post 124 is in the second set position, it avoids the continuous machining track. Specifically, the fixed base 121 is connected to the base 110 by screws 123. This detachable fixed connection makes cleaning the overall fixture 100 and replacing parts more convenient. The fixed base 121 has an adjustment hole for the horizontal sliding of the limiting post 124. The fixed base 121 is equipped with a locking screw 122 for locking the limiting post 124 into the adjustment hole. When the end face of the cemented carbide workpiece 200 in the Y-axis direction does not require machining, after machining the cemented carbide workpiece 200, the limiting post 124 slides horizontally against the end wall of the cemented carbide workpiece 200 in the Y-axis direction, achieving the calibration standard for the next assembly of the cemented carbide workpiece 200. This, combined with the positioning of the cemented carbide workpiece 200 in the X-axis direction by the first fixed clamp, simplifies the calibration assembly process and accelerates production efficiency. When the end face of the cemented carbide workpiece 200 in the Y-axis direction has a part that does not require machining, by adjusting the position of the fixed base 121 to face the part that does not require machining, the limiting post 124 slides horizontally against the end wall of the cemented carbide workpiece 200 in the Y-axis direction, achieving the calibration standard for the next assembly of the cemented carbide workpiece 200. When the end face of the cemented carbide workpiece 200 in the Y-axis direction needs to be deeply machined, after the cemented carbide workpiece 200 is initially measured and positioned, the scale value on the limit post 124 is obtained and recorded after adjusting the position of the limit post 124. During the machining process, the limit post 124 is retracted to the second set position, thereby avoiding the electrode wire 13 and providing reliable data support when assembling the cemented carbide workpiece 200 next time.

[0030] When the second fixing clip 140 presses and fixes the cemented carbide workpiece 200, the first fixing clip and the positioning clip 120 cooperate with each other to press against the end face of the cemented carbide workpiece 200 in the X and Y axis directions. Thus, when the second fixing clip 140 applies a pre-tightening force, the cemented carbide workpiece 200 will not be displaced, ensuring machining accuracy.

[0031] In the specific setting of the second fixing clip 140, the second fixing clip 140 includes: a pressure plate assembly 141, and an L-shaped limiting block 143 slidably connected to the pressure plate assembly 141; the L-shaped limiting block 143 presses and fixes the top bend of the cemented carbide workpiece 200. A sliding groove is provided on the pressure plate assembly 141, and the L-shaped limiting block 143 is connected to the sliding groove through a locking sliding member. It is used to adjust and clamp the cemented carbide workpiece 200 of different sizes. The second fixing clip also includes an adjusting rod 142 connected to the threaded base 110; the adjusting rod 142 passes through the sliding groove and is rotatably connected to the pressure plate assembly 141. It controls and adjusts the clamping height for different types of cemented carbide workpieces 200. The locking sliding member includes: a slider 144 slidably assembled inside the sliding groove, and a threaded rod 145 threaded through the slider 144; wherein, the end of the threaded rod 145 is rotatably connected to the L-shaped limiting block 143. The slider 144 has a built-in threaded hole, and the end of the threaded rod 145 is connected to the L-shaped limit block 143 through a rotatable pin. When the threaded rod 145 travels along the thread of the slider 144, the angle of the cemented carbide workpiece 200 is pressed and fixed.

[0032] In one specific embodiment of this application, the length of the cemented carbide workpiece 200 is 184 mm, the width is 85 mm, the height is 92 mm, and the weight is over 24 kg. Therefore, by applying a clamping force from the top through the second fixing clip 140, combined with the friction between the weight of the cemented carbide workpiece 200 and the bottom of the base 110, displacement of the cemented carbide workpiece 200 during wire EDM is prevented. Of course, it should be understood that in other embodiments of this application, the continuous machining track is not limited to an I-shaped track; various machining tracks can be matched according to the machining shape of the cemented carbide workpiece 200.

[0033] In this application, the first fixing clip and the positioning clip 120 provide correction and limit for the X and Y axes of the cemented carbide workpiece 200, enabling the cemented carbide workpiece 200 to be quickly and accurately corrected during processing. Furthermore, when the second fixing clip 140 clamps and fixes the cemented carbide workpiece 200, no displacement deviation occurs. This eliminates the need for cumbersome correction steps, simplifying the operation and improving efficiency. It ensures that the parallelism, perpendicularity, and flatness of the cemented carbide workpiece 200 are within a reasonable range, guaranteeing the reference datum for subsequent processing and improving processing quality. Moreover, through continuous processing tracks, the frequent disassembly and reassembly of the electrode wire 13 due to interference during processing is reduced, stabilizing the relative processing position of the electrode wire 13 and further improving processing accuracy and efficiency.

[0034] In addition, this application also provides a cutting method, including a cutting method for correcting and fixing a cemented carbide workpiece on the above-mentioned fixture for wire electrical discharge machining, comprising the following steps: S1. The two pre-machined cemented carbide workpieces are assembled on the base using a measurement and positioning method. The first fixing clip contacts the end wall of the cemented carbide workpiece in the X-axis direction. The second fixing clip is engaged and fixed at the top corner of the cemented carbide workpiece. After the limiting post extends to the first set position, it presses against the end face of the cemented carbide workpiece in the Y-axis direction and records the scale value. S2. The wire cutting machine tool drives the electrical discharge wire to travel along the I-shaped machining track for one revolution to complete the wire cutting of two cemented carbide workpieces. S3. After the two cemented carbide workpieces are machined, the limiting post extends to press against the end wall of the cemented carbide workpiece in the Y-axis direction and locks it in place; or, the limiting post extends to the first set position according to the recorded value and then locks it in place. S4. After loosening the second locking component, remove the finished cemented carbide workpiece from the base, and reassemble the cemented carbide workpiece to be processed onto the base. The end wall of the cemented carbide workpiece to be processed in the X-axis direction contacts and limits the first fixing component, and the end wall of the cemented carbide workpiece to be processed in the Y-axis direction contacts and limits the limit post. S5. After locking the second locking piece, position the cemented carbide workpiece to be processed, and the limit post retracts to the second set position. Repeat S2~S4.

[0035] Using the above methods, the initial positioning satisfies the requirements for subsequent batch processing correction. The correction work is simple and convenient, and no displacement deviation should occur when the second clamping part is pressed and fixed. This eliminates the need for cumbersome correction steps, simplifying the operation and improving efficiency. It ensures that the parallelism, perpendicularity, and flatness of the cemented carbide workpiece are within a reasonable range, guaranteeing the reference datum for subsequent processing and improving processing quality. Through continuous processing tracks, frequent disassembly and assembly caused by interference during electrode wire processing are reduced, stabilizing the relative processing position of the electrode wire and further improving processing accuracy and efficiency.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this disclosure, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this specification, which are not provided in detail for the sake of brevity.

[0037] Additionally, to simplify the description and discussion, and to avoid obscuring one or more embodiments of this specification, well-known power / ground connections for other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be illustrated in block diagram form to avoid obscuring one or more embodiments of this specification, and this also takes into account the fact that the details of implementation of these block diagram apparatuses are highly dependent on the platform on which one or more embodiments of this specification will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details have been set forth to describe exemplary embodiments of this disclosure, it will be apparent to those skilled in the art that one or more embodiments of this specification may be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0038] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the scope of protection of this disclosure.

Claims

1. A fixture for wire electrical discharge machining, comprising a fixture for avoiding a worktable beam and continuously machining carbide workpieces; characterized in that, The fixing fixture includes: a base with a continuous machining track; a first fixing clip for limiting the cemented carbide workpiece in the X-axis direction; a positioning clip for positioning the cemented carbide workpiece in the Y-axis direction; and a second fixing clip for pressing and fixing the cemented carbide workpiece; wherein... The first fixing member includes a plurality of limiters connected to the base; the limiters fit and limit the end face of the cemented carbide workpiece in the X-axis direction; The positioning device includes: a fixed base detachably and fixedly connected to the base; and a limiting post that can be slidably locked at a first set position and a second set position. The limiting post is provided with a scale. When the limiting post is locked to the first set position, the limiting post has a limiting point that limits the end face of the cemented carbide workpiece in the Y-axis direction. When the limiting post is located at the second set position, the limiting post avoids the continuous machining track. The second fixing component includes: a pressure plate assembly and an L-shaped limiting block slidably connected to the pressure plate assembly; the L-shaped limiting block presses and fixes the top corner of the cemented carbide workpiece.

2. The fixture for wire electrical discharge machining according to claim 1, characterized in that, The continuous machining track is an I-shaped machining track set on the base.

3. The fixture for wire electrical discharge machining according to claim 2, characterized in that, The base is provided with two processing stations adapted to the continuous processing track, and the cemented carbide workpieces are assembled one-to-one on the two processing stations.

4. The fixture for wire electrical discharge machining according to claim 3, characterized in that, The plurality of the limiters limit the contact between the end faces of the two cemented carbide workpieces that are facing each other.

5. The fixture for wire electrical discharge machining according to claim 4, characterized in that, The pressure plate assembly has a sliding groove, and the L-shaped limiting block is connected to the sliding groove through a locking sliding member.

6. The fixture for wire electrical discharge machining according to claim 5, characterized in that, The second fixing clip also includes an adjusting rod that is threadedly connected to the base; The adjusting rod passes through the sliding groove and is rotatably connected to the pressure plate assembly.

7. The fixture for wire electrical discharge machining according to claim 6, characterized in that, The locking slider includes: a slider slidably assembled inside the sliding groove, and a threaded rod threaded through the slider; wherein... The end of the threaded rod is rotatably connected to the L-shaped limiting block.

8. The fixture for wire electrical discharge machining according to claim 1, characterized in that, The mounting bracket is connected to the base by screws.

9. The fixture for wire electrical discharge machining according to claim 8, characterized in that, The fixed base is provided with an adjustment hole for the limiting post to slide horizontally, and the fixed base is equipped with a locking screw for locking the limiting post to the adjustment hole.

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