A wire electrical discharge machining center for metal forming

Abstract

This invention belongs to the field of wire electrical discharge machining (EDM) technology, and relates to an EDM wire cutting machine tool for metal forming. It includes a machine bed, on which a dual-axis drive module is mounted. The dual-axis drive module is mounted on a support frame, and a clamping frame is fixedly connected within the support frame. An L-shaped frame is slidably connected to the machine bed, and a guide frame is fixedly connected within the support frame. A molybdenum wire is arranged on the machine bed, the L-shaped frame, and the guide frame. A sliding frame is slidably connected to the L-shaped frame and has a first push rod mounted on it. A linearly distributed first locking block is slidably connected to the sliding frame. The support frame has linearly distributed second push rods, and a second locking block is fixedly connected to the telescopic end of the second push rod. This invention ensures the smooth operation of the wire cutting process by providing timely support to the cut slit in the workpiece during the wire cutting process using the first and second locking blocks, maintaining the slit width, ensuring the stability of the molybdenum wire's movement space, and thus guaranteeing the smooth operation of the wire cutting process.

Description

Technical Field

[0001] This invention relates to the field of wire electrical discharge machining (EDM) technology, and more particularly to an EDM wire cutting machine tool for metal forming. Background Technology

[0002] Medium-speed wire EDM is an EDM processing equipment that falls between fast-speed and slow-speed wire EDM. It uses molybdenum wire as a cutting tool and performs non-contact processing on the workpiece by means of electricity. The parameters can be adjusted according to the processing requirements, and high precision and surface quality can be achieved through multiple cutting processes.

[0003] When using a medium-speed wire EDM machine to cut long strip-shaped workpieces, the rigidity of the workpiece gradually decreases as the cutting process progresses. If there is untreated residual stress inside the workpiece, the two sides of the workpiece will spring back and squeeze towards the middle at the cutting position to reduce the width of the cutting kerf, affecting the normal movement of the molybdenum wire. In severe cases, it may even directly contact the molybdenum wire and break it, affecting the smooth progress of the cutting process. Summary of the Invention

[0004] In order to overcome the disadvantages mentioned in the background above, the present invention provides an electrical discharge wire cutting machine tool for metal forming.

[0005] The technical solution of the present invention is: an electrical discharge wire cutting machine tool for metal forming, comprising a bed, a dual-axis drive module installed on the bed, a support frame installed on the dual-axis drive module, a clamping frame for fixing the workpiece fixedly connected inside the support frame, an L-shaped frame slidably connected to the bed, a guide frame fixedly connected inside the support frame, a molybdenum wire jointly provided on the bed, the L-shaped frame and the guide frame, a sliding frame slidably connected to the L-shaped frame and equipped with a first push rod, the telescopic end of the first push rod being fixedly connected to the sliding frame, a linearly distributed first locking block slidably connected to the sliding frame, and a linearly distributed second push rod provided on the support frame, the telescopic end of the second push rod being fixedly connected to a second locking block, both the first locking block and the second locking block being used to support the gap cut into the workpiece.

[0006] To further explain, both the first card block and the second card block are provided with symmetrically distributed inclined surfaces.

[0007] Further explanation: The L-shaped frame is fixedly connected to a first air storage cylinder. A sealing rod is slidably connected inside the first air storage cylinder, and a tension spring is provided between the two. An air guide channel is provided inside the sliding frame. The first locking block slides in a sealed manner within the air guide channel. The first air storage cylinder and the air guide channel are connected by a pipe. The sealing rod is used to block the pipe of the air guide channel. The L-shaped frame is fixedly connected to a second air storage cylinder. The second air storage cylinder is connected to the first air storage cylinder by a pipe. A first circular plate is fixedly connected inside the second air storage cylinder, and a second circular plate is slidably connected in a sealed manner. The second circular plate is located on the side of the first circular plate away from the pipe of the second air storage cylinder. Both the first and second circular plates have through holes, and a one-way valve is installed in each of the through holes. A hinge rod is hinged to the second circular plate. A fixed shell is fixedly connected to the L-shaped frame. A sliding rod is slidably connected to the fixed shell and fixedly connected to the sealing rod. A rotating wheel is rotatably connected to the hinge rod.

[0008] To further explain, the flow direction of the one-way valve on the first circular plate is the same as the flow direction of the one-way valve on the second circular plate.

[0009] To further explain, the hinge position between the hinge rod and the rotating wheel is located at the eccentricity of the rotating wheel.

[0010] Further explanation: It also includes a first fixing rod, which is fixedly connected to the L-shaped frame. The first fixing rod is provided with a first guide shell. Two symmetrically distributed first rotating shafts are rotatably connected inside the first guide shell. The support frame is provided with a support plate. The linearly distributed second push rods are all fixedly connected to the support plate. The support plate is fixedly connected with a second guide shell. Two symmetrically distributed second rotating shafts are provided inside the second guide shell and fixedly connected with a second fixing rod. The first fixing rod, the two first rotating shafts, the two second rotating shafts, and the second fixing rod are all wound with an insulating rope. The insulating rope is provided with a winding part.

[0011] To further clarify, the diameter of the molybdenum wire is twice the diameter of the insulating rope.

[0012] To further explain, it also includes a first driving component, which is mounted on the L-shaped frame and is used to drive the first guide shell to rotate. The first guide shell is rotatably connected to the first fixed rod.

[0013] To further explain, the support plate is equipped with a motor, the second guide shell is slidably connected to two slides, the two second axises rotate in the corresponding slides respectively, the output shaft of the motor is fixedly connected to a drive rod that is rotatably connected to the second guide shell, the drive rod is provided with two threaded sections in opposite directions, the threaded sections of the drive rod are threadedly connected to the corresponding slides, and a spring is provided between the second fixed rod and the insulating rope.

[0014] To further explain, a second driving component is installed between the guide frame and the support plate, and the second driving component is used to drive the support plate to move up and down.

[0015] Compared with existing similar technologies, the present invention has at least the following advantages: During the wire cutting process of the workpiece, the first and second clamping blocks provide timely support for the gap cut into the workpiece, maintain the width of the gap, ensure the stability of the molybdenum wire movement space, and thus ensure the smooth progress of the wire cutting process. The position of the workpiece is detected by a rotating wheel. When the rotating wheel separates from the workpiece, the first clamping block is pushed outward from the air guide channel by a pneumatic transmission method, so as to actively separate the cut part of the workpiece from the body. The insulating rope is wound into the gap to clean up the waste residue that has not been completely separated from the workpiece, reducing the accumulation of waste residue in the gap, so as to ensure the stability of the current path during the cutting process and thus ensure the integrity of the workpiece surface. Furthermore, the first drive unit, the motor and the second drive unit are used to control the length and height of the winding part to adapt to the thickness of different workpieces and improve the applicability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the parts on the support frame of the present invention; Figure 3 This is a three-dimensional structural diagram of the L-shaped frame and guide frame of the present invention; Figure 4 This is a three-dimensional structural schematic diagram of the L-shaped frame and guide frame of the present invention from another perspective; Figure 5 This is a three-dimensional structural cross-sectional view of the L-shaped frame of the present invention; Figure 6 This is a three-dimensional structural cross-sectional view of the first and second gas storage cylinders of the present invention; Figure 7 This is a three-dimensional structural diagram illustrating the positional relationship between the hinge rod and the rotating wheel of the present invention; Figure 8 This is a three-dimensional structural diagram of the second guide shell and the second driving component of the present invention; Figure 9 This is a three-dimensional structural cross-sectional view of the first guide shell of the present invention; Figure 10 This is a three-dimensional structural cross-sectional view of the second guide shell of the present invention; Figure 11 This is a three-dimensional structural diagram of the second fixing rod and the spring of the present invention.

[0017] In the attached diagram, the markings are as follows: 1: Bed frame, 2: Dual-axis drive module, 3: Support frame, 4: Clamping frame, 5: L-shaped frame, 6: Molybdenum wire, 7: Guide frame, 8: Sliding frame, 9: First push rod, 10: First locking block, 11: Second push rod, 12: Second locking block, 13: First air storage cylinder, 14: Sealing rod, 15: Air guide channel, 16: Second air storage cylinder, 17: First circular plate, 18: Second circular plate, 19: Hinge rod, 2 0: Fixed housing, 21: Sliding rod, 22: Rotary wheel, 23: First fixed rod, 24: First guide housing, 2401: First winding shaft, 25: Support plate, 26: Second guide housing, 2601: Second winding shaft, 27: Second fixed rod, 2701: Spring, 28: Insulating rope, 2801: Winding part, 29: First driving component, 30: Motor, 31: Carriage, 32: Drive rod, 33: Second driving component. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0019] When using a medium-speed wire EDM machine to cut long strip-shaped workpieces, the rigidity of the workpiece gradually decreases as the cutting process progresses. If there is untreated residual stress inside the workpiece, the two sides of the workpiece will spring back and squeeze towards the middle at the cutting position to reduce the width of the cutting kerf, affecting the normal movement of the molybdenum wire. In severe cases, it may even directly contact the molybdenum wire and break it, affecting the smooth progress of the cutting process.

[0020] Example 1

[0021] A wire electrical discharge machining (EDM) machine for metal forming, combined with Figures 1-6 As shown, the device includes a bed 1, a dual-axis drive module 2, a support frame 3, a clamping frame 4 for fixing the workpiece fixed inside the support frame 3, an L-shaped frame 5 slidably connected to the bed 1, a guide frame 7 fixed inside the support frame 3, a molybdenum wire 6 shared by the bed 1, a sliding frame 8 slidably connected to the L-shaped frame 5 and a first push rod 9 installed thereon, the telescopic end of the first push rod 9 fixed to the sliding frame 8, two linearly distributed first locking blocks 10 slidably connected to the sliding frame 8, and two linearly distributed second push rods 11 provided on the support frame 3, the telescopic end of the second push rods 11 fixed to the second locking blocks 12. Both the first locking blocks 10 and the second locking blocks 12 are used to support the gaps cut into the workpiece, and both the first locking blocks 10 and the second locking blocks 12 are provided with symmetrically distributed inclined surfaces.

[0022] In the above scheme, the bed 1 is an existing mechanism with functions of spraying water and rewinding and releasing the molybdenum wire 6, which is not shown in detail in the figure. The dual-axis drive module 2 is an existing mechanism used to drive the support frame 3 to move in the front-back and left-right directions. The clamping frame 4 is an existing mechanism with several threaded holes. By screwing bolts with fixing plates into the threaded holes, the workpiece can be clamped using the fixing plates. The L-shaped frame 5 is driven by the power inside the bed 1 to achieve up-down movement. The L-shaped frame 5 is equipped with a power mechanism for driving the movement of the molybdenum wire 6. This part of the structure is an existing structure. The molybdenum wire 6 can be made of molybdenum wire and... Galvanized wire; the bed 1, L-shaped frame 5, and guide frame 7 together form the guide and winding path of molybdenum wire 6; the first push rod 9 is used to drive the sliding frame 8 to move up and down along the L-shaped frame 5 to adapt to the thickness of the workpiece; in the non-working state, the first locking block 10 and the second locking block 12 are on the same vertical plane (left and right direction) as the front part of the molybdenum wire 6; the inclined surfaces of the first locking block 10 and the second locking block 12 are used to facilitate insertion into the gap cut into the workpiece; the first locking block 10 and the second locking block 12 are used to support the gap cut into the workpiece to ensure the stability of the gap width, thereby ensuring the normal working state of the molybdenum wire 6.

[0023] Combination Figures 3-7 As shown, an L-shaped frame 5 is fixedly connected to a first air storage cylinder 13. A sealing rod 14 is slidably connected inside the first air storage cylinder 13, and a tension spring is provided between them. An air guide channel 15 is provided inside the sliding frame 8. A first locking block 10 slides slidably within the air guide channel 15. The first air storage cylinder 13 and the air guide channel 15 are connected via a pipe. The sealing rod 14 is used to block the pipe of the air guide channel 15. A second air storage cylinder 16 is fixedly connected to the L-shaped frame 5. The second air storage cylinder 16 is connected to the first air storage cylinder 13 via a pipe. A first circular plate 17 is fixedly connected inside the second air storage cylinder 16, and a second circular plate 18 is slidably connected within it. Plate 18 is located on the side of the first circular plate 17 away from the second gas storage cylinder 16 pipe. Both the first circular plate 17 and the second circular plate 18 have through holes, and both have one-way valves installed in their through holes. The flow direction of the one-way valve on the first circular plate 17 is the same as that of the one-way valve on the second circular plate 18. The second circular plate 18 is hinged with a hinge rod 19. The L-shaped frame 5 is fixedly connected to a fixed shell 20. The fixed shell 20 is slidably connected to a sliding rod 21 that is fixedly connected to the sealing rod 14. The sliding rod 21 is rotatably connected to a rotating wheel 22 that is hinged to the hinge rod 19. The hinge position between the hinge rod 19 and the rotating wheel 22 is located at the eccentricity of the rotating wheel 22.

[0024] In the above scheme, the central axis of the first gas storage cylinder 13, the central axis of the second gas storage cylinder 16, and the central axis of the fixed shell 20 are on the same vertical plane (front-back direction) as the part of the molybdenum wire 6 near the L-shaped frame 5; the first gas storage cylinder 13 is used to temporarily store high-pressure gas, and in the non-working state, the sealing rod 14 is separated from the pipeline of the gas guiding channel 15, and the tension spring of the sealing rod 14 is in the normal state; the first gas storage cylinder 13 uses the pipeline to inject gas into the gas guiding channel 15 to push the two first clamping blocks 10 forward, thereby separating the workpiece cutting part; the one-way valve of the second circular plate 18 is in When it moves downward relative to the second air reservoir 16, it opens, allowing air from the lower part of the second circular plate 18 to enter between the first circular plate 17 and the second circular plate 18. The one-way valve of the first circular plate 17 is used to guide the air from its lower part upward. The hinge position of the hinge rod 19 and the rotating wheel 22 limits the hinge rod 19, the second circular plate 18 and the second air reservoir 16 to form a piston structure, so as to realize the intermittent injection of air into the first air reservoir 13. During the process of the rotating wheel 22 driving the hinge rod 19 to move, the hinge rod 19 will not contact the second air reservoir 16 to ensure the smooth progress of the air injection process.

[0025] Working principle: When using this device to perform wire cutting on a workpiece, the main body of the workpiece is fixed to the clamping frame 4. Then, the dual-axis drive module 2 is activated. The dual-axis drive module 2 controls the position of the support frame 3 so that the left side of the workpiece on the clamping frame 4 is aligned with the molybdenum wire 6 at the position to be cut. Then, the bed 1 drives the L-shaped frame 5 to move downward, so that the lower side of the rotating wheel 22 contacts the upper side of the workpiece. The rotating wheel 22 stops moving, and the sliding rod 21 slides upward relative to the fixed shell 20. The sliding rod 21 drives the sealing rod 14 to move relative to the first air storage cylinder 13 until the sealing rod 14 blocks the air guide channel 15. The pipe is plugged (during which the tension spring of the plugging rod 14 is stretched and stored). The L-shaped frame 5 is stopped by the control of the bed body 1. At this time, the molybdenum wire 6 and the rotating wheel 22 are both moved to the working area. The first push rod 9 and the two second push rods 11 are started. The telescopic end of the first push rod 9 drives the two first locking blocks 10 to move downward through the sliding frame 8. The telescopic end of the second push rod 11 drives the corresponding second locking block 12 to move upward until the lower side of the first locking block 10 is lower than the upper side of the workpiece and the upper side of the second locking block 12 is higher than the lower side of the workpiece. The first push rod 9 and the two second push rods 11 are closed, and the work preparation stage is completed.

[0026] After the preparation stage is completed, the positive and negative terminals of the molybdenum wire 6 and the workpiece are connected respectively. The dual-axis drive module 2 controls the workpiece to move to the left through the support frame 3 and the clamping frame 4. The molybdenum wire 6 performs wire cutting on the workpiece. During the cutting process of the molybdenum wire 6, the rotating wheel 22 contacts the upper surface of the workpiece and rotates due to friction. During the rotation of the rotating wheel 22, the second circular plate 18 is moved up and down by the eccentric rotation of the hinge rod 19.

[0027] When the second circular plate 18 moves downward, the one-way valve of the second circular plate 18 opens, allowing outside air to enter between the second circular plate 18 and the first circular plate 17. When the second circular plate 18 moves upward, the one-way valve of the first circular plate 17 opens, allowing the air between the second circular plate 18 and the first circular plate 17 to be squeezed into the first air storage cylinder 13 by the second circular plate 18 through the pipe. As the rotating wheel 22 continues to move along the workpiece, the gas pressure in the first air storage cylinder 13 gradually increases.

[0028] As the workpiece continues to move to the left, the first locking block 10 on the right, the second locking block 12 on the right, the second locking block 12 on the left, and the first locking block 10 on the left sequentially enter the slit cut into the workpiece (this order is only shown according to the arrangement in the attached figure and is not a limitation; it can be changed and adjusted in actual situations). The first locking block 10 and the second locking block 12 support the slit of the workpiece, suppressing the deformation of the workpiece caused by internal stress, so as to ensure the stability of the slit width and thus ensure the normal cutting process and integrity of the molybdenum wire 6.

[0029] When the rotating wheel 22 moves to the right relative to the workpiece and separates from the workpiece, the tension of the sealing rod 14 is released, causing the sealing rod 14 to drive the rotating wheel 22 to move downward via the sliding rod 21. The sealing rod 14 no longer blocks the pipe of the air guide channel 15. At this time, the high-pressure air in the first air storage cylinder 13 enters the air guide channel 15 through the pipe and pushes the two first clamping blocks 10 forward. The two first clamping blocks 10 together push the part of the workpiece that has been cut forward, actively driving the workpiece and the part that has been cut to separate, thus completing the wire cutting action.

[0030] After the workpiece is cut, the workpiece and the cut-off parts are collected. The support frame 3 is reset using the dual-axis drive module 2. Then, the dual-axis drive module 2 is turned off, and the L-shaped frame 5 is moved up and reset using the bed 1. The sliding frame 8, the two first locking blocks 10 and the two second locking blocks 12 are reset using the first push rod 9 and the two second push rods 11. The device is then cleaned, completing the use of the device.

[0031] Example 2

[0032] Based on Example 1, combined with Figure 3 , Figure 4 and Figures 8-10As shown, it also includes a first fixing rod 23, which is fixed to the L-shaped frame 5. The first fixing rod 23 is provided with a first guide shell 24. Two symmetrically distributed first rotating shafts 2401 are rotatably connected inside the first guide shell 24. The support frame 3 is provided with a support plate 25. The linearly distributed second push rods 11 are all fixed to the support plate 25. The support plate 25 is fixed to a second guide shell 26. Two symmetrically distributed second rotating shafts 2601 are provided inside the second guide shell 26 and a second fixing rod 27 is fixed to them. The first fixing rod 23, the two first rotating shafts 2401, the two second rotating shafts 2601, and the second fixing rod 27 are all wound with an insulating rope 28. The insulating rope 28 is provided with a winding part 2801. The diameter of the molybdenum wire 6 is twice the diameter of the insulating rope 28.

[0033] In the above scheme, the insulating rope 28 has wear resistance, such as aramid fiber, and the winding part 2801 is composed of two parts of the insulating rope 28 twisted together. The winding part 2801 is used to extend into the gap cut into the workpiece to clean up the waste residue that was not separated from the workpiece in time after cutting. When the workpiece is cut by electrical discharge wire cutting with molybdenum wire 6, the width cut by molybdenum wire 6 (i.e., the width of the gap cut into the workpiece) is greater than the diameter of molybdenum wire 6 (this is the situation produced by the existing method). By comparing the diameter of molybdenum wire 6 and the diameter of insulating rope 28, the cleaning effect of winding part 2801 on waste residue is ensured. The insulating rope 28 is connected end to end. The winding method of insulating rope 28 on the first fixed rod 23 and the second fixed rod 27 shown in the attached figure is only for illustration.

[0034] In this embodiment, before processing the waste residue using the winding part 2801, the vertical length of the winding part 2801 is manually adjusted according to the workpiece thickness. Then, the insulating rope 28 is wound around the first fixed rod 23, the two first winding shafts 2401, the two second winding shafts 2601, and the second fixed rod 27. During the leftward movement of the workpiece, the winding part 2801 enters the gap of the workpiece to clean the waste residue that has not been cleaned in the gap of the workpiece, reducing the impact of the waste residue in the workpiece on the current path and reducing the damage to the workpiece surface caused by the presence of an additional current path. Furthermore, since the diameter of the molybdenum wire 6 is twice the diameter of the insulating rope 28, the winding part 2801 does not directly contact the gap of the workpiece, reducing the friction experienced by the winding part 2801 and extending its service life.

[0035] Example 3

[0036] Based on Example 2, combined with Figure 3 , Figure 4 and Figures 8-11As shown, it also includes a first driving component 29, which is mounted on the L-shaped frame 5 and is used to drive the first guide shell 24 to rotate. The first guide shell 24 is rotatably connected to the first fixed rod 23. The support plate 25 is equipped with a motor 30. The second guide shell 26 is slidably connected to two slides 31. The two second pivot shafts 2601 rotate in the corresponding slides 31 respectively. The output shaft of the motor 30 is fixedly connected to a driving rod 32 that is rotatably connected to the second guide shell 26. The driving rod 32 is provided with two threaded sections in opposite directions. The threaded sections of the driving rod 32 are threadedly connected to the corresponding slides 31. A spring 2701 is provided between the second fixed rod 27 and the insulating rope 28. The guide frame 7 and the support plate 25 are equipped with a second driving component 33, which is used to drive the support plate 25 to move up and down.

[0037] In Embodiment 2, the length of the winding part 2801 in the vertical direction needs to be manually adjusted during the installation of the insulating rope 28. However, in this embodiment, only the insulating rope 28 needs to be installed, and subsequent adjustments do not require manual adjustment.

[0038] In the above scheme, the first driving component 29 consists of a motor and a bevel gear set. The output shaft of the motor is fixedly connected to one of the bevel gears, and the other bevel gear is fixedly connected to the first guide shell 24 to realize the rotation of the first guide shell 24 relative to the support plate 25, thereby controlling the length of the winding part 2801 in the vertical direction (when the first guide shell 24 rotates in the forward direction, the upper two sides of the insulating rope 28 twist, and the length of the winding part 2801 in the vertical direction increases; when it rotates in the reverse direction, the upper two sides of the insulating rope 28 are released, and the length of the winding part 2801 in the vertical direction decreases); when the insulating rope 28 is installed on the second fixed rod 27, the spring 2701 is in a charged state. When the first guide shell 24 rotates in the forward direction, the spring 2701 charges again, releasing part of the insulating rope 28 to maintain the overall tension; when the first guide shell 24 rotates in the reverse direction, the torque of the spring 2701 is released to wind more of the insulating rope 28 onto the second fixed rod 27 to maintain the overall tension.

[0039] In the non-working state, the distance between the two second winding shafts 2601 is greater than the distance between the two first winding shafts 2401, so that the winding part 2801 is located in the upper middle part of the insulating rope 28. When it is necessary to adjust the position of the winding part 2801 on the insulating rope 28, the motor 30 controls the drive rod 32 to drive the two slides 31 to move. When the two slides 31 move in opposite directions, the distance between the two second winding shafts 2601 decreases, and the spring 2701 adaptably ensures the tension of the insulating rope 28. The position of the winding part 2801 changes downward. When the two slides 31 move away from each other, the distance between the two second winding shafts 2601 increases, and the spring 2701 adaptably ensures the tension of the insulating rope 28. The position of the winding part 2801 changes upward to adapt to the position of the workpiece gap.

[0040] The second drive unit 33 consists of a motor, two pairs of gear sets and a scissor-type telescopic frame. The motor drives the adjacent gear sets to change the extension length of the scissor-type telescopic frame, thereby changing the height of the support plate 25, so as to adjust the height of the winding part 2801 as a whole. During this process, the spring 2701 adaptively ensures the tension of the insulating rope 28.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A wire electrical discharge machining (EDM) machine for metal forming, comprising a bed (1), wherein the bed (1) is equipped with a dual-axis drive module (2), the dual-axis drive module (2) is equipped with a support frame (3), a clamping frame (4) for fixing workpiece is fixedly connected inside the support frame (3), an L-shaped frame (5) is slidably connected to the bed (1), a guide frame (7) is fixedly connected inside the support frame (3), and a molybdenum wire (6) is provided together on the bed (1), the L-shaped frame (5) and the guide frame (7), characterized in that: The L-shaped frame (5) is slidably connected to a sliding frame (8) and equipped with a first push rod (9). The telescopic end of the first push rod (9) is fixedly connected to the sliding frame (8). The sliding frame (8) is slidably connected to a linearly distributed first locking block (10). The support frame (3) is provided with a linearly distributed second push rod (11). The telescopic end of the second push rod (11) is fixedly connected to a second locking block (12). Both the first locking block (10) and the second locking block (12) are used to support the gaps cut into the workpiece.

2. The wire electrical discharge machining (EDM) machine tool for metal forming according to claim 1, characterized in that: Both the first card block (10) and the second card block (12) are provided with symmetrically distributed inclined surfaces.

3. The wire electrical discharge machining (EDM) machine tool for metal forming according to claim 1, characterized in that: The L-shaped frame (5) is fixedly connected to a first air storage cylinder (13). A sealing rod (14) is slidably connected inside the first air storage cylinder (13), and a tension spring is provided between the two. An air guide channel (15) is provided inside the sliding frame (8). The first locking block (10) slides in a sealed manner within the air guide channel (15). The first air storage cylinder (13) and the air guide channel (15) are connected through a pipe. The sealing rod (14) is used to block the pipe of the air guide channel (15). The L-shaped frame (5) is fixedly connected to a second air storage cylinder (16). The second air storage cylinder (16) is connected to the first air storage cylinder (13) through a pipe. 16) A first circular plate (17) is fixedly connected to the inside and a second circular plate (18) is slidably connected to it. The second circular plate (18) is located on the side of the first circular plate (17) away from the second gas storage cylinder (16) pipe. Both the first circular plate (17) and the second circular plate (18) have through holes, and both have one-way valves installed in their through holes. The second circular plate (18) is hinged to a hinge rod (19). The L-shaped frame (5) is fixedly connected to a fixed shell (20). The fixed shell (20) is slidably connected to a sliding rod (21) which is fixedly connected to the sealing rod (14). The sliding rod (21) is rotatably connected to a rotating wheel (22) which is hinged to the hinge rod (19).

4. The wire electrical discharge machining (EDM) machine tool for metal forming according to claim 3, characterized in that: The flow direction of the one-way valve on the first circular plate (17) is the same as the flow direction of the one-way valve on the second circular plate (18).

5. The wire electrical discharge machining (EDM) machine tool for metal forming according to claim 3, characterized in that: The hinge position of the hinge rod (19) and the rotating wheel (22) is located at the eccentric part of the rotating wheel (22).

6. The wire electrical discharge machining (EDM) machine tool for metal forming according to claim 3, characterized in that: It also includes a first fixing rod (23), which is fixed to the L-shaped frame (5). The first fixing rod (23) is provided with a first guide shell (24). Two symmetrically distributed first rotating shafts (2401) are rotatably connected inside the first guide shell (24). The support frame (3) is provided with a support plate (25). The linearly distributed second push rods (11) are all fixed to the support plate (25). The support plate (25) is fixed with a second guide shell (26). Two symmetrically distributed second rotating shafts (2601) are provided inside the second guide shell (26) and a second fixing rod (27) is fixed to it. The first fixing rod (23), the two first rotating shafts (2401), the two second rotating shafts (2601) and the second fixing rod (27) are all wound with an insulating rope (28). The insulating rope (28) is provided with a winding part (2801).

7. The wire electrical discharge machining (EDM) machine tool for metal forming according to claim 6, characterized in that: The diameter of the molybdenum wire (6) is twice the diameter of the insulating rope (28).

8. The wire electrical discharge machining (EDM) machine tool for metal forming according to claim 6, characterized in that: It also includes a first driving member (29), which is mounted on the L-shaped frame (5). The first driving member (29) is used to drive the first guide shell (24) to rotate. The first guide shell (24) is rotatably connected to the first fixing rod (23).

9. The wire electrical discharge machining (EDM) machine tool for metal forming according to claim 8, characterized in that: The support plate (25) is equipped with a motor (30), and the second guide shell (26) is slidably connected to two slides (31). The two second pivot shafts (2601) rotate in the corresponding slides (31). The output shaft of the motor (30) is fixedly connected to a drive rod (32) that is rotatably connected to the second guide shell (26). The drive rod (32) is provided with two threaded sections in opposite directions. The threaded sections of the drive rod (32) are threadedly connected to the corresponding slides (31). A spring (2701) is provided between the second fixed rod (27) and the insulating rope (28).

10. A wire electrical discharge machining (EDM) machine tool for metal forming according to claim 9, characterized in that: A second driving component (33) is installed between the guide frame (7) and the support plate (25), and the second driving component (33) is used to drive the support plate (25) to move up and down.

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