Fine cutting with fast wire cutting machine tool

Abstract

This utility model discloses a high-speed wire EDM machine tool for precision cutting, including a base. A two-dimensional planar moving module is installed on the upper surface of the base. A workpiece bearing platform is set on the working plane of the two-dimensional planar moving module. A deep groove is provided on the surface of the workpiece bearing platform. A bidirectional synchronous opening and closing drive mechanism is set in the deep groove. The two relative motion output ends of the bidirectional synchronous opening and closing drive mechanism are rigidly connected to independent clamping plates. The bidirectional locking of the workpiece is achieved by the symmetrical displacement of the bidirectional synchronous opening and closing drive mechanism. A support frame is vertically fixed to the upper part of the base. A slot is opened at the horizontal cantilever end of the support frame. A bearing seat is set at the bottom of the slot. A rotary power source is installed at the top of the slot. A transmission spindle connected to the output shaft of the rotary power source is rotatably connected in the bearing seat. An adjustment plate is fixed to the outer wall of the transmission spindle. A high-speed wire EDM actuator is set at one end of the adjustment plate.

Description

Technical Field

[0001] This utility model relates to the field of cutting machine tool technology, specifically to a high-speed wire cutting machine tool for precision cutting. Background Technology

[0002] Wire EDM (Wire Cutting Machine) is a precision cutting equipment widely used in mold making, aerospace and other fields. This equipment uses a continuously moving metal wire as an electrode and uses the heat energy generated by high-frequency discharge to precisely cut the workpiece. Its main advantages are that it can process conductive materials with high hardness and complex shapes, with narrow kerf, high precision and good surface roughness.

[0003] In existing technologies, the cutting head has limited functionality, only capable of performing vertical cutting or cutting at a fixed single angle. When faced with curved contour cutting tasks, it is necessary to manually adjust the workpiece posture repeatedly to match the cutting angle. This process is not only time-consuming and labor-intensive, but also greatly reduces the overall processing efficiency. At the same time, traditional fixtures mostly use unidirectional mechanical clamping. During the cutting process, the impact force generated by cutting vibration can easily cause the workpiece to shift. This is especially true for thin-walled workpieces, where the impact of vibration is more significant, causing not only workpiece deformation but also cutting errors. Utility Model Content

[0004] The purpose of this invention is to provide a high-speed wire EDM machine for precision cutting, so as to solve the problems mentioned in the background art, which are that the cutting head can only cut vertically or at a fixed single angle, and the machining of curved contours requires repeated manual adjustment of the workpiece posture, which is time-consuming, labor-intensive and inefficient.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precision wire EDM machine tool, comprising a base, a two-dimensional planar moving module mounted on the upper surface of the base, a workpiece bearing platform on the working plane of the two-dimensional planar moving module, a deep groove on the surface of the workpiece bearing platform, a bidirectional synchronous opening and closing drive mechanism within the deep groove, two relative motion output ends of the bidirectional synchronous opening and closing drive mechanism being rigidly connected to independent clamping plates, bidirectional locking of the workpiece being achieved through the symmetrical displacement of the bidirectional synchronous opening and closing drive mechanism, a support frame being vertically fixed to the upper part of the base, a slot being opened at the horizontal cantilever end of the support frame, a bearing seat being provided at the bottom of the slot, a rotary power source being mounted at the top of the slot, a transmission spindle being rotatably connected to the bearing seat and connected to the output shaft of the rotary power source, an adjusting plate being fixed to the outer wall of the transmission spindle, and a wire EDM actuator being provided at one end of the adjusting plate; the rotational power source drives the transmission spindle to rotate around its axis, causing the adjusting plate to perform angular deflection movement, thereby achieving horizontal position adjustment of the wire EDM actuator.

[0006] Based on the preferred embodiment of this technical solution, a U-shaped frame is also fixedly connected to the surface of the workpiece support platform. A bearing seat 2 is provided on the inner wall of one end of the U-shaped frame. A rotating shaft extending to the outside of the U-shaped frame is rotatably connected inside the bearing seat 2. A mounting seat is fixedly connected to the outer wall of the rotating shaft. A linkage rod is fixedly connected to the upper outer wall of the mounting seat. A pressure plate is fixedly connected to the end of the linkage rod. A pressure block is fixedly connected to the lower end face of the pressure plate.

[0007] In the preferred embodiment of this technical solution, a support base is installed on the upper end face of the workpiece bearing platform, and a transmission rod is rotatably connected inside the support base. A driving bevel gear is provided on the outer wall of the transmission rod, and a driven bevel gear is provided on the outer wall of the rotating shaft. The driving bevel gear and the driven bevel gear are meshed and connected.

[0008] Based on the preferred embodiment of this technical solution, the bidirectional synchronous opening and closing drive mechanism includes a bearing seat three disposed on the inner wall of the deep groove, a bidirectional lead screw rotatably connected inside the bearing seat three, the end of the bidirectional lead screw extending to the outside of the workpiece bearing platform and fixedly connected to a knob, a drive plate disposed on the threaded section of the bidirectional lead screw, the upper end face of the drive plate being fixedly connected to the lower part of the clamping plate, a guide slide rod being fixedly connected inside the deep groove, and the outer wall of the guide slide rod being slidably connected to the drive plate.

[0009] In the preferred embodiment of this technical solution, a worm is coaxially arranged on the smooth section of the bidirectional lead screw, and a worm wheel is arranged on the outer wall of the transmission rod, with the worm and worm wheel meshing together.

[0010] Based on the preferred embodiment of this technical solution, the inner wall of the deep groove is integrally provided with a limiting baffle, the limiting baffle and the deep groove form an inner cavity, the inner cavity is used to accommodate the worm gear, and a through groove is opened at the bottom of the inner cavity.

[0011] In the preferred embodiment of this technical solution, the clamping surface of the clamping plate is provided with an elastic element, and the surface of the knob is provided with anti-slip texture.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. Through the synergistic effect of the bidirectional synchronous opening and closing drive mechanism and the U-shaped frame clamping structure, multi-directional locking of the workpiece is achieved, and additional clamping force is provided by the pressure plate pressing down. It is especially suitable for anti-deformation fixing of thin-walled parts, and solves the defect of easy loosening of traditional single-point clamping.

[0014] 2. The knob, combined with the worm gear transmission, allows for one-handed operation to simultaneously control the opening and closing of the clamping plate and the pressing down of the pressure plate, eliminating the cumbersome process of step-by-step adjustment required by traditional clamps;

[0015] 3. The fast wire EDM actuator achieves horizontal adjustment (±90°) through a rotating power source and adjustment plate. Combined with a two-dimensional planar moving module, it can meet different cutting needs. Attached Figure Description

[0016] Figure 1This is a schematic diagram of one embodiment of the high-speed wire EDM machine tool for precision cutting according to this utility model;

[0017] Figure 2 This is a schematic diagram of the groove structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the bidirectional lead screw of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the pressure plate of this utility model;

[0020] Figure 5 This is a schematic diagram of the transmission rod of this utility model.

[0021] In the diagram: 1. Base; 2. Two-dimensional planar moving module; 3. Workpiece bearing platform; 4. Deep groove; 5. Clamping plate; 6. Support frame; 7. Groove; 8. Bearing seat one; 9. Rotary power source; 10. Transmission spindle; 11. Adjusting plate; 12. Fast wire EDM actuator; 13. U-shaped frame; 14. Bearing seat two; 15. Rotating shaft; 16. Mounting seat; 17. Linkage rod; 18. Pressure plate; 19. Pressing block; 20. Support seat; 21. Transmission rod; 22. Driving bevel gear; 23. Driven bevel gear; 24. Bearing seat three; 25. Two-way lead screw; 26. Knob; 27. Drive plate; 28. Worm gear; 29. ​​Worm wheel; 30. Limiting baffle; 31. Inner cavity; 32. Guide slide rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5This utility model provides an embodiment of a precision wire EDM machine tool, including a base 1. A two-dimensional planar moving module 2 is installed on the upper surface of the base 1. A workpiece bearing platform 3 is provided on the working plane of the two-dimensional planar moving module 2. A deep groove 4 is provided on the surface of the workpiece bearing platform 3. A bidirectional synchronous opening and closing drive mechanism is provided in the deep groove 4. The two relative motion output ends of the bidirectional synchronous opening and closing drive mechanism are rigidly connected to independent clamping plates 5 respectively. The bidirectional locking of the workpiece is achieved by the symmetrical displacement of the bidirectional synchronous opening and closing drive mechanism. A support frame 6 is vertically fixed to the upper part of the base 1. A slot 7 is opened at the horizontal cantilever end of the support frame 6. A bearing seat 8 is provided at the bottom of the slot 7. A rotary power source 9 is installed at the top of the slot 7. A transmission spindle 10 connected to the output shaft of the rotary power source 9 is rotatably connected in the bearing seat 8. An adjustment plate 11 is fixed to the outer wall of the transmission spindle 10. A fast wire EDM actuator 12 is provided at one end of the adjustment plate 11.The rotary power source 9 drives the transmission spindle 10 to rotate around its axis, causing the adjusting plate 11 to deflect at an angle, thus adjusting the horizontal position of the fast wire cutter. The base 1, serving as the machine tool's basic support structure, is integrally cast from high-strength cast iron (HT300). It bears the entire weight of the machine tool, absorbs cutting vibrations, and ensures processing stability. Adjustable feet are provided at the bottom to adapt to different ground flatness levels. The support frame 6 is welded from rectangular steel pipes, and its surface is sandblasted and coated with anti-rust paint. It provides power to the rotary power source 9 and the transmission spindle 10. Rigid support and slot 7 structure facilitate the installation and angle adjustment of the transmission spindle 10. The two-dimensional planar moving module 2 consists of X-axis (transverse) and Y-axis (longitudinal) linear guides (model HGW30CA), driven by a servo motor (model 80ST-M02430) with a ball screw. It is used to achieve precise movement of the workpiece bearing platform 3 in the horizontal plane, adapting to the needs of complex contour cutting. The workpiece is fixed by bidirectional locking to prevent workpiece displacement during cutting. The rotary power source 9 (model 57BYGH56-401A) is installed on the top of slot 7 and connected by a coupling. The drive spindle 10 is connected to the main shaft, which is supported at the bottom of the slot 7 by a bearing housing 8 (model UCP208, with a sealing ring) to achieve rotation around the axis. By converting the rotational motion of the rotary power source 9 into precise angular deflection of the drive spindle 10, it can adapt to the needs of oblique hole or irregular shape cutting. One end of the adjusting plate 11 (made of aluminum alloy) is fixed to the outer wall of the drive spindle 10, and the other end is equipped with a fast wire cutting actuator 12 (including wire storage drum, conductive block, and jet device). The actuator is connected to the adjusting plate 11 through a linear guide rail (model MGN12H) for fine-tuning the cutting. The wire is positioned vertically, and the wire storage drum is driven by a variable frequency motor to achieve constant tension reciprocating motion of the cutting wire (molybdenum wire). A conductive block (made of copper) is fixed to the front end of the actuator, contacting the molybdenum wire to conduct current. The jetting device uses a multi-nozzle structure, delivering working fluid (deionized water + additives) via a high-pressure pump. This fluid is used to cool the cutting area (reducing temperature by 50%-70%) and remove etching products. The bidirectional synchronous opening and closing drive uses a screw drive, driving the moving end meshing with it through threads in different directions, thus achieving symmetrical movement and driving the clamping plate to open and close.

[0024] Please see Figure 1 and Figure 4A further embodiment of this solution is as follows: A U-shaped frame 13 is also fixedly connected to the surface of the workpiece support platform 3. A bearing seat 2 14 is provided on the inner wall of one end of the U-shaped frame 13. A rotating shaft 15 extending to the outside of the U-shaped frame 13 is rotatably connected inside the bearing seat 2 14. A mounting seat 16 is fixedly connected to the outer wall of the rotating shaft 15. A linkage rod 17 is fixedly connected to the upper outer wall of the mounting seat 16. A pressure plate 18 is fixedly connected to the end of the linkage rod 17. A pressure block 19 is fixedly connected to the lower end face of the pressure plate 18. The U-shaped frame 13 is integrally cast from aluminum alloy and is fixedly connected to the surface of the workpiece support platform 3 by bolts. A shaft is opened on the vertical side wall of the U-shaped frame 13. The mounting hole has an embedded bearing housing 14 (model UC205) which provides rigid support for the rotating shaft 15, ensuring the rotational stability of the rotating shaft 15. The rotating shaft 15 is rotatably connected through the bearing housing 14, with one end extending to the outside of the U-shaped frame 13 and fixed to the mounting base 16 (made of carbon steel). The upper outer wall of the mounting base 16 is vertically welded with a linkage rod 17, which is used to transmit the rotational motion to the pressure plate 18. The pressure plate 18 (made of stainless steel) is linked to the rotating shaft 15 through the linkage rod 17. The lower end face is attached with a pressure block 19 (made of silicone). The rotation of the rotating shaft 15 causes the pressure plate 18 to press down, thereby fixing the workpiece.

[0025] Please see Figure 1 and Figure 5 A further solution based on this embodiment is as follows: A support base 20 is installed on the upper end face of the workpiece support platform 3. A transmission rod 21 is rotatably connected inside the support base 20. An active bevel gear 22 is provided on the outer wall of the transmission rod 21, and a driven bevel gear 23 is provided on the outer wall of the rotating shaft 15. The active bevel gear 22 and the driven bevel gear 23 are meshed and connected. The support base 20 (made of cast iron) is installed on the upper end face of the workpiece support platform 3 by bolts. A deep groove ball bearing is embedded inside. The transmission rod 21 is rotatably connected by the bearing. The driven bevel gear 23 is provided on the outer wall of the rotating shaft 15 and meshes with the active bevel gear 22 (cone angle 45°). The meshing transmission ratio is 2:1, which realizes deceleration and torque increase. The small gear drives the large gear to reduce the pressing speed of the pressure plate 18.

[0026] Please see Figure 1 and Figure 5A further solution based on this embodiment is as follows: The bidirectional synchronous opening and closing drive mechanism includes a bearing seat 24 disposed on the inner wall of the deep groove 4. A bidirectional lead screw 25 is rotatably connected inside the bearing seat 24. The end of the bidirectional lead screw 25 extends to the outside of the workpiece support platform 3 and is fixedly connected to a knob 26. A drive plate 27 is disposed on the threaded section of the bidirectional lead screw 25. The upper end face of the drive plate 27 is fixedly connected to the lower part of the clamping plate 5. A guide slide rod 32 is fixedly connected inside the deep groove 4. The outer wall of the guide slide rod 32 slides against the drive plate 27. The connection is as follows: the bidirectional lead screw 25 (made of stainless steel) is rotatably connected to the inner wall of the deep groove 4 through the bearing seat 24 (model UC204). The drive plate 27 (made of aluminum alloy) has a threaded hole and is threaded to the lead screw. The outer wall has a sliding hole and is slidably connected to the guide slide rod 32. When the knob 26 is rotated, the bidirectional lead screw 25 drives the two drive plates 27 to move symmetrically, realizing the opening and closing of the clamping plate 5. The guide slide rod 32 eliminates the rotational degree of freedom of the drive plate 27, ensuring that it only moves along the lead screw axis, thereby improving the clamping stability.

[0027] Please see Figure 1 and Figure 5 A further solution based on this embodiment is as follows: a worm 28 is coaxially arranged on the smooth section of the bidirectional lead screw 25, and a worm wheel 29 is arranged on the outer wall of the transmission rod 21. The worm 28 and the worm wheel 29 are meshed and connected. When the knob 26 is rotated, the worm 28 drives the worm wheel 29 to rotate, thereby driving the transmission rod 21 to rotate. The worm wheel 29 and worm 28 transmission has self-locking properties, which can prevent the transmission rod 21 from rotating accidentally.

[0028] Please see Figure 1 A further solution based on this embodiment is as follows: a limiting baffle 30 is integrally provided on the inner wall of the deep groove 4. The limiting baffle 30 and the deep groove 4 form an inner cavity 31, which is used to accommodate the worm 28. A through groove is provided at the bottom of the inner cavity 31. The limiting baffle 30 integrally formed on the inner wall of the deep groove 4 and the deep groove 4 form a closed inner cavity 31, which is used to prevent the worm wheel 29 and the worm 28 from interfering with the clamping plate 5 during transmission, and at the same time to prevent foreign objects from entering the meshing area.

[0029] Please see Figure 1 and Figure 3 A further solution based on this embodiment is as follows: the clamping surface of the clamping plate 5 is provided with an elastic element, the surface of the knob 26 is provided with anti-slip texture, and the clamping surface of the clamping plate 5 (made of stainless steel) is embedded with an elastic element (made of polyurethane) to increase the friction coefficient, prevent the workpiece from sliding, absorb vibration, and improve cutting accuracy.

[0030] Working principle: The operator first places the workpiece to be processed on the workpiece support table 3. By rotating the knob 26 on the outside of the workpiece support table 3, the double-acting lead screw 25 is driven to rotate. The double-acting lead screw 25 is supported by the bearing seat 3 24 and rotates. Its threaded section drives two symmetrically distributed drive plates 27 to move towards each other along the axial direction of the guide slide rod 32, realizing the synchronous opening and closing of the clamping plate 5, thereby locking the workpiece in both directions. At this time, the polyurethane elastic element of the clamping surface of the clamping plate 5 is in contact with the workpiece surface, which increases the friction coefficient to prevent displacement caused by cutting vibration, and absorbs vibration energy at the same time.

[0031] Meanwhile, the rotating shaft 15 on the outer side of the rotating U-shaped frame 13 is supported by the bearing seat 14 for rotation. The mounting seat 16 on its outer wall drives the linkage rod 17 and the pressure plate 18 to press down, so that the silicone pressure block 19 on the lower end face of the pressure plate 18 contacts the workpiece surface, forming a multi-point fixation. The rotation of the rotating shaft 15 is driven by the transmission rod 21. The driving bevel gear 22 on the outer wall of the transmission rod 21 meshes with the driven bevel gear 23 on the outer wall of the rotating shaft 15. At the same time, the worm 28 on the smooth section of the bidirectional screw 25 meshes with the worm wheel 29 on the outer wall of the transmission rod 21 to prevent the transmission rod 21 from rotating accidentally.

[0032] When a curved contour cutting task is required, the rotary power source 9 is started, and its output shaft drives the transmission spindle 10 to rotate through the coupling. The transmission spindle 10 is supported by the bearing seat 8 at the bottom of the slot 7 of the support frame 6, which drives the adjustment plate 11 to deflect at an angle. The fast wire cutting actuator 12 at the end of the adjustment plate 11 is then adjusted to the target cutting angle. The wire storage drum in the actuator drives the molybdenum wire to achieve constant tension reciprocating motion through the frequency conversion motor. The conductive block contacts the molybdenum wire to conduct current. The jetting device sprays a working fluid mixed with deionized water and additives through a multi-nozzle structure to cool the cutting area and remove the etching products.

[0033] The fast wire cutting actuator 12 and the two-dimensional planar moving module 2 mentioned in the article are existing mature technologies, and those skilled in the art can directly use the finished products.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision wire EDM machine, comprising a base (1), wherein a two-dimensional planar moving module (2) is mounted on the upper surface of the base (1); characterized in that: A workpiece carrier platform (3) is provided on the working plane of the two-dimensional planar moving module (2). A deep groove (4) is provided on the surface of the workpiece carrier platform (3). A bidirectional synchronous opening and closing drive mechanism is provided in the deep groove (4). The two relative motion output ends of the bidirectional synchronous opening and closing drive mechanism are rigidly connected to independent clamping plates (5). The bidirectional locking of the workpiece is achieved by the symmetrical displacement of the bidirectional synchronous opening and closing drive mechanism. A support frame (6) is vertically fixed to the upper part of the base (1). A slot (7) is opened at the horizontal cantilever end of the support frame (6). A bearing seat (8) is provided at the bottom of the slot (7). A rotary power source (9) is installed at the top of the slot (7). A transmission spindle (10) connected to the output shaft of the rotary power source (9) is rotatably connected in the bearing seat (8). An adjustment plate (11) is fixed to the outer wall of the transmission spindle (10). A fast wire cutting actuator (12) is provided at one end of the adjustment plate (11). The drive spindle (10) is driven to rotate around its axis by the rotating power source (9), which in turn drives the adjustment plate (11) to perform angular deflection movement, thereby realizing the horizontal position adjustment of the fast wire cutter.

2. The precision wire EDM machine tool for precision cutting according to claim 1, characterized in that: A U-shaped frame (13) is also fixed to the surface of the workpiece support platform (3). A bearing seat (14) is provided on the inner wall of one end of the U-shaped frame (13). A rotating shaft (15) extending to the outside of the U-shaped frame (13) is rotatably connected inside the bearing seat (14). A mounting seat (16) is fixed to the outer wall of the rotating shaft (15). A linkage rod (17) is fixed to the upper outer wall of the mounting seat (16). A pressure plate (18) is fixed to the end of the linkage rod (17). A pressure block (19) is fixed to the lower end face of the pressure plate (18).

3. The precision wire EDM machine tool for precision cutting according to claim 2, characterized in that: A support base (20) is installed on the upper end face of the workpiece support platform (3). A transmission rod (21) is rotatably connected inside the support base (20). An active bevel gear (22) is provided on the outer wall of the transmission rod (21), and a driven bevel gear (23) is provided on the outer wall of the rotating shaft (15). The active bevel gear (22) and the driven bevel gear (23) are meshed and connected.

4. The precision wire EDM machine tool for precision cutting according to claim 3, characterized in that: The bidirectional synchronous opening and closing drive mechanism includes a bearing seat three (24) set on the inner wall of the deep groove (4), a bidirectional lead screw (25) rotatably connected in the bearing seat three (24), the end of the bidirectional lead screw (25) extends to the outside of the workpiece support platform (3) and is fixedly connected to a knob (26), the threaded section of the bidirectional lead screw (25) is provided with a drive plate (27), the upper end face of the drive plate (27) is fixedly connected to the lower part of the clamping plate (5), a guide slide rod (32) is fixedly connected in the deep groove (4), and the outer wall of the guide slide rod (32) is slidably connected to the drive plate (27).

5. The precision cutting wire EDM machine tool according to claim 4, characterized in that: The smooth section of the double-acting screw (25) is coaxially provided with a worm (28), and the outer wall of the transmission rod (21) is provided with a worm wheel (29). The worm (28) and the worm wheel (29) are meshed and connected.

6. The precision wire EDM machine tool for precision cutting according to claim 5, characterized in that: The inner wall of the deep groove (4) is integrally provided with a limiting baffle (30), and the limiting baffle (30) and the deep groove (4) form an inner cavity (31), which is used to accommodate the worm (28), and a through groove is provided at the bottom of the inner cavity (31).

7. The precision wire EDM machine tool for precision cutting according to claim 6, characterized in that: The clamping surface of the clamping plate (5) is provided with an elastic element, and the surface of the knob (26) is provided with anti-slip texture.

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