Numerical control wire cut electric discharge machine

Abstract

The application discloses a numerical control wire-cut electric spark machine tool and belongs to the technical field of mechanical part machining. A cutting main body is arranged on one side of a wire storage mechanism. The cutting main body comprises a rack, a wire conveying mechanism, a base, a moving workbench and a machining workbench. A rack is arranged on the upper side of the base. The wire conveying mechanism is connected to the outer side of the rack through a synchronous belt. The application has the beneficial effect that the arc-shaped structure of the extrusion disc seat can be automatically adjusted according to the change of the part shape, the purpose of closely adhering to the surface of the irregular part is achieved, the limitation of the traditional fixed clamp on the part shape is broken, stable and reliable clamping effect can be obtained whether the part is a regular geometric body or has a complex curved surface, the machining part range of the factory is significantly expanded, and the adaptability of the equipment to multi-variety, small-batch and customized production demands is improved.

Description

Technical Field

[0001] This application relates to the field of mechanical parts processing technology, and in particular to a CNC wire electrical discharge machining tool. Background Technology

[0002] CNC wire electrical discharge machining (EDM) machines utilize a continuously moving fine metal wire (called the electrode wire) as an electrode to perform pulsed spark discharge on the workpiece, removing metal and cutting it into shape. They are widely used in mold manufacturing, aerospace, automotive parts, and precision instruments, and are particularly suitable for processing parts with high hardness, high toughness, and complex shapes. They feature high machining accuracy, narrow kerf, and wide material adaptability. In recent years, with the development of manufacturing towards high precision, high efficiency, and intelligentization, CNC wire EDM machines have made significant progress in structural design and functional integration. Regarding machine tool structure, current technologies generally employ a bed, worktable, wire feeding mechanism, and cutting... The modular design of mechanisms and control systems enables precise control of the machining trajectory through a CNC system. In terms of the fixture system, traditional wire EDM machines are usually equipped with fixed fixtures or simple vises, which are used to position and hold the workpiece by bolt fastening or pressure plate clamping. In terms of the coolant system, in order to reduce the temperature of the machining area, flush away the erosion products, and maintain the stability of the discharge, the machine tools generally adopt a working fluid circulation cooling method. The working fluid is delivered to the machining area by a water pump and then returned to the filter device for recycling through metal pipes. Although existing CNC wire EDM machines can meet the basic requirements in conventional machining scenarios, the following problems still exist in actual production applications. Currently, most wire EDM machines on the market use standardized, fixed-position fixtures (such as flat-jaw vises or clamping plates). The installation position and clamping angle of these fixtures are relatively fixed, meaning they can only be used for workpieces with regular shapes (such as square or round). When dealing with irregularly shaped parts (such as irregular curved surfaces or asymmetrical structures), traditional fixed fixtures often struggle to find suitable clamping points, or require the use of a specialized fixture, resulting in higher costs. Furthermore, due to the low degree of adjustment freedom of the fixtures, operators cannot flexibly adjust the clamping position according to the specific contours of the workpiece, leading to clamping difficulties or even complete clamping failure. This significantly limits the range of parts that a factory can process and reduces equipment utilization. Meanwhile, during the cutting process, the coolant carries a large amount of electrolytic corrosion products (such as metal shavings and oxide particles) during circulation. Existing recycling methods mostly rely on metal pipes for flow guidance. Due to the large amount of impurities in the coolant, after long-term use, these impurities are prone to deposit and accumulate at the bends and joints of the metal pipes, causing the inner diameter of the pipes to narrow or even become completely blocked. This seriously affects the normal flow and recycling of the coolant, increases maintenance costs and downtime. Furthermore, in the actual production cutting process, due to the large number of parts on the worktable and the relative physical barriers between these parts, the flow path of the coolant is disrupted. This causes the coolant to accumulate during flow, making it impossible for it to flow into the recycling system in a timely and complete manner, thus affecting subsequent recycling. Summary of the Invention

[0003] One of the objectives of this application is to address the problem that the installation position of the fixture and the shape of the parts that can be clamped are too fixed or too simple when using CNC wire EDM machines on the market, and to provide a CNC wire EDM machine.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: a CNC wire EDM machine tool, including a wire storage mechanism, a cutting body is provided on one side of the wire storage mechanism, the cutting body includes a frame, a wire feeding mechanism, a base, a movable worktable, a machining worktable and a working fluid circulation unit, a frame is provided above one side of the base, a wire feeding mechanism connected by a synchronous belt is provided on the outside of the frame, an upper wire frame is provided on one side of the wire feeding mechanism, a lower wire frame is provided below the upper wire frame, the lower wire frame is fixedly connected to the bottom of the outer side of the frame, the upper wire frame is slidably connected to the top of the outer side of the frame, a movable worktable connected by a first moving mechanism is provided above the base, a machining worktable connected by a second moving mechanism is provided inside the movable worktable, and movable clamping units are distributed above the machining worktable; The clamping unit includes a mounting component at the bottom and a fixing frame at the top. The fixing frame is polygonal in shape, and a pressing component is provided on one side of the polygonal structure.

[0005] Preferably, the first and second moving mechanisms have the same structure, and the specific moving principle is based on the movement of a ball screw.

[0006] Preferably, the processing workbench includes a mounting base plate and a mounting frame. The top of the mounting base plate is detachably mounted to the mounting frame. A reserved hole is provided in the middle of the mounting frame. Rectangular mounting holes are evenly distributed outside the reserved hole for assembling and disassembling with the clamping unit.

[0007] Preferably, the working fluid circulation unit includes a support base, a storage tank, and an inlet pipe. The storage tank is provided at the top of the support base, and a pump body is provided outside the storage tank. The water outlet of the pump body is connected to the outlet pipe, and the nozzle position at the top of the outlet pipe corresponds to the wire hole at the bottom of the upper wire frame.

[0008] Preferably, the middle part of the mounting base plate and the mounting frame is set as a hollow structure, and a liquid inlet pipe is provided on the lower outer side of the mounting frame to assist in the recycling of the working fluid.

[0009] Preferably, the inlet pipe includes a main pipe, a telescopic pipe, and an outlet branch pipe. One side of the main pipe penetrates the outside of the storage tank, and the other side is detached from and installed with the telescopic pipe. The other side of the telescopic pipe is detached from and installed with the outlet branch pipe, and the outlet branch pipes are evenly spaced outside the mounting frame.

[0010] Preferably, the mounting assembly includes a locking seat and a mounting plate. The locking seat engages with a rectangular mounting hole, and the mounting plate is disposed above the locking seat. The mounting plate is detachable from and can be installed on the top of the mounting frame.

[0011] Preferably, the top of the mounting plate is provided with a fixing frame, and the hollow structure inside the fixing frame is provided with an extrusion component.

[0012] Preferably, the extrusion assembly includes an intermediate slide rod, a fixed seat, a sliding seat, a rotating rod, and an extrusion frame. The intermediate slide rod is located at the center of the fixed frame, and a sliding seat and a fixed seat are respectively located above and below it. A pneumatic rod is located between the sliding seat and the fixed seat. A rotating rod connected to a shaft is located on the outer side of both the sliding seat and the fixed seat, and the top end of the rotating rod is connected to the extrusion frame by a shaft.

[0013] Preferably, the extrusion frame includes longitudinal rods, extrusion disc seats, and transverse rods. Three longitudinal rods are equally spaced and connected to each other by transverse rods. The inner side of each longitudinal rod has a groove, and extrusion disc seats connected by reset shafts are equally spaced inside the groove. The extrusion disc seats are arranged in a fan shape and have gripping teeth at their top. The extrusion disc seats inside the longitudinal rods on both sides are staggered vertically.

[0014] Compared with the prior art, the beneficial effects of this application are as follows: (1) Multiple mounting rectangular holes are evenly distributed on the top of the processing worktable, and clamping units are detachably installed inside the mounting rectangular holes. Each clamping unit can be selectively installed in different mounting rectangular holes. Thus, the position and number of clamping units can be flexibly arranged according to the specific shape, size and center of gravity distribution of the parts. When clamping, the longitudinal rod moves forward to make its end initially fit with the surface of the part. Combined with the rotation adjustment function of the fan-shaped extrusion plate seat, the contact surface of the arc structure of the extrusion plate seat can adaptively adjust the angle according to the change of the part shape, so as to achieve the purpose of close contact with the surface of the irregular part. Thus, the limitation of the traditional fixed fixture on the shape of the part is broken. Whether it is a regular geometric body or a complex curved surface, a stable and reliable clamping effect can be obtained, which significantly expands the range of parts that the factory can process and improves the equipment's adaptability to the needs of multi-variety, small-batch and customized production.

[0015] (2) The multiple rectangular holes at the top of the machining table not only serve as installation holes for clamping units, but also form a natural flow channel for coolant to fall. Under the action of gravity, the coolant and mixed impurities generated during the cutting process can quickly flow downward through the rectangular holes, avoiding the problem of liquid accumulation on the surface of the traditional flat worktable. The falling working fluid is promptly sucked up and recovered by the liquid outlet pipe. Since the top of the liquid outlet pipe is equipped with a telescopic pipe structure, the telescopic pipe can adapt to the longitudinal movement of the machining table and always maintain effective connection with the recovery port on the storage tank. At the same time, the micro-vibration generated during the operation of the equipment can make the telescopic pipe and the liquid outlet pipe vibrate continuously. This vibration can effectively prevent impurities from adhering and accumulating on the inner wall of the pipe, forming a temporary unblocking effect on the pipe, reducing the risk of blockage, ensuring the long-term stable operation of the coolant recovery system, realizing continuous and uninterrupted processing of the machine tool, and improving equipment utilization and production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0017] Figure 2 This is a side view of the structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the rear structure of the present invention.

[0019] Figure 4 This is a partially enlarged structural diagram of the top of the liquid inlet pipe of the present invention.

[0020] Figure 5 This is an enlarged schematic diagram of the bottom structure of the wire feeding mechanism of the present invention.

[0021] Figure 6 This is a schematic diagram of the processing workbench structure of the present invention.

[0022] Figure 7 This is a schematic diagram of the main view of the clamping unit half-section structure of the present invention.

[0023] Figure 8 This is a schematic diagram of the half-section side view of the clamping unit structure of the present invention.

[0024] In the diagram: 1. Wire storage mechanism; 2. Frame; 3. Wire conveying mechanism; 4. Base; 5. Moving worktable; 6. Processing worktable; 61. Mounting base plate; 62. Mounting frame; 63. Mounting rectangular hole; 64. Reserved hole; 7. Working fluid circulation unit; 71. Support seat; 72. Storage tank; 73. Inlet pipe; 731. Main pipe; 732. Telescopic pipe; 733. Outlet branch pipe; 74. Outlet pipe; 8. Synchronous belt; 10. Clamping unit; 101. Clamping seat; 102. Mounting plate; 103. Fixed frame; 104. Intermediate slide bar; 105. Fixed seat; 106. Sliding seat; 107. Rotating rod; 108. Extrusion frame; 1081. Longitudinal rod; 1082. Extrusion disc seat; 1083. Transverse rod; 109. Pneumatic rod; 11. Upper wire frame; 12. Lower wire frame. Detailed Implementation

[0025] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0027] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] One preferred embodiment of this application, such as Figures 1 to 8As shown, a CNC wire EDM machine tool includes a wire storage mechanism 1. A cutting body is provided on one side of the wire storage mechanism 1. The cutting body includes a frame 2, a wire feeding mechanism 3, a base 4, a movable worktable 5, a machining worktable 6, and a working fluid circulation unit 7. A frame 2 is provided above one side of the base 4. A wire feeding mechanism 3 connected to the frame 2 via a synchronous belt 8 is provided on the outside of the frame 2. An upper wire frame 11 is provided on one side of the wire feeding mechanism 3. A lower wire frame 12 is provided below the upper wire frame 11. The lower wire frame 12 is fixedly connected to the bottom of the outer side of the frame 2. The upper wire frame 11 is slidably connected to the top of the outer side of the frame 2. A movable worktable 5 connected via a first moving mechanism is provided above the base 4. A machining worktable 6 connected via a second moving mechanism is provided inside the movable worktable 5. Movable clamping units 10 are distributed above the machining worktable 6. The clamping unit 10 includes a mounting component at the bottom and a fixing frame 103 at the top. The fixing frame 103 is polygonal in shape, and a pressing component is provided on one side of the polygonal structure.

[0029] The first and second moving mechanisms have the same structure, and their specific moving principle is based on the movement of a ball screw.

[0030] This application provides a CNC wire EDM machine tool with clamping units 10. Specifically, during use, an appropriate number of clamping units 10 are selected according to the shape and center of gravity of the workpiece to be processed. Then, each clamping unit 10 is installed in a suitable position on the processing table 6 to ensure that the workpiece can be clamped. After the workpiece is clamped, the electrode wire is led out from the wire storage drum on the wire storage mechanism 1, and passes through the guide wheel inside the wire feeding mechanism 3, the guide wheel on the upper wire frame 11, the wire threading hole of the workpiece, and the guide wheel on the lower wire frame 12 in sequence, and finally returns to the wire storage drum to form a closed loop. Then, the first moving mechanism and the second moving mechanism drive the workpiece at the top of the processing table 6 to move, ensuring that the reference surface of the workpiece is in contact with the electrode wire. Then, according to the cutting requirements of the workpiece, the first moving mechanism and the second moving mechanism drive the workpiece to move according to the set program through the processing table 6. With the linkage between the upper wire frame 11 and the lower wire frame 12, the wire cutting work can be completed. During the cutting process, the working fluid circulation unit 7 continuously sprays and recovers coolant to ensure the normal operation of the cutting work.

[0031] As a further preferred embodiment, according to Figure 4 , Figure 5 and Figure 6As shown, the processing workbench 6 includes a mounting base plate 61 and a mounting frame 62. The top of the mounting base plate 61 is detachably mounted to the mounting frame 62. A reserved hole 64 is provided in the middle of the mounting frame 62. Rectangular mounting holes 63 are evenly distributed outside the reserved hole 64 for assembling and disassembling with the clamping unit 10.

[0032] The mounting base plate 61 and the mounting frame 62 are hollow in the middle, and an inlet pipe 73 is provided on the lower outer side of the mounting frame 62 to assist in the recovery and circulation of the working fluid.

[0033] Specifically, when placing the workpiece, it is placed on the top of the mounting frame 62. According to the placement position of the workpiece, an appropriate number of clamping units 10 are taken so that they engage with the mounting rectangular holes 63 on the workpiece attachment position. After that, the installation work is completed. The reference surface of the workpiece to be cut corresponds to the position of the reserved hole 64. Thus, with the cooperation of the lower wire frame 12 below the reserved hole 64 and the upper wire frame 11 located at the top of the lower wire frame 12, the cutting work can be completed.

[0034] Furthermore, according to Figure 3 and Figure 4 As shown, the working fluid circulation unit 7 includes a support base 71, a storage tank 72, and an inlet pipe 73. The storage tank 72 is provided at the top of the support base 71. A pump body is provided outside the storage tank 72, and the water outlet end of the pump body is connected to the outlet pipe 74. The nozzle position at the top of the outlet pipe 74 corresponds to the wire hole at the bottom of the upper wire frame 11.

[0035] The inlet pipe 73 includes a main pipe 731, a telescopic pipe 732, and an outlet branch pipe 733. One side of the main pipe 731 penetrates the outside of the storage tank 72, and the other side is detached from and installed with the telescopic pipe 732. The other side of the telescopic pipe 732 is detached from and installed with the outlet branch pipe 733, and the outlet branch pipes 733 are evenly spaced outside the mounting frame 62.

[0036] Specifically, during the working fluid circulation, the pump first draws the working fluid from the storage tank 72 into the outlet pipe 74, and then sprays it out through the nozzle at the top of the outlet pipe 74 to complete the cooling process. The sprayed coolant falls onto the worktable 6 and then falls into the mounting frame 62 through the mounting rectangular hole 63 at the top of the worktable 6. Since the mounting frame 62 has an outlet branch pipe 733 on its outer side, the coolant that enters the mounting frame 62 will enter the outlet branch pipe 733, working in conjunction with the external pump to complete the recovery process. During the entire operation of the machine tool, the entire worktable 6 moves continuously under the action of the first and second moving mechanisms, which generates relative vibration. When vibration occurs, the presence of the telescopic pipe 732 temporarily clears the blockage between the telescopic pipe 732 and the main pipe 731, ensuring that the coolant can be continuously and efficiently recovered without frequent unblocking.

[0037] In this application, the lower frame 12 moves within a groove on the outside of the mounting frame 62, and the height of the groove is higher than the height of the outlet pipe 733, ensuring that coolant does not leak out through the groove. If leakage occurs, the inside of the mounting frame 62 needs to be cleaned promptly. Cleaning can be performed by simply removing the mounting frame 62 from the mounting base plate 61. The removal can be done using bolts or screws, and this invention does not impose any limitations on this process. As a further preferred embodiment, during clamping, according to Figure 7 and Figure 8 As shown, the mounting assembly includes a locking seat 101 and a mounting plate 102. The locking seat 101 engages with the mounting rectangular hole 63, and the mounting plate 102 is provided above the locking seat 101. The mounting plate 102 is detached from and installed on the top of the mounting frame 62.

[0038] The top of the mounting plate 102 is provided with a fixing frame 103, and the hollow structure inside the fixing frame 103 is provided with an extrusion component.

[0039] The extrusion assembly includes a central slide rod 104, a fixed seat 105, a sliding seat 106, a rotating rod 107, and an extrusion frame 108. The central slide rod 104 is located at the center of the fixed frame 103, and the sliding seat 106 and the fixed seat 105 are respectively located above and below it. A pneumatic rod 109 is located between the sliding seat 106 and the fixed seat 105. A rotating rod 107 with a shaft connection is provided on the outer side of both the sliding seat 106 and the fixed seat 105, and the top end of the rotating rod 107 is axially connected to the extrusion frame 108.

[0040] The extrusion frame 108 includes longitudinal rods 1081, extrusion disc seats 1082, and transverse rods 1083. Three longitudinal rods 1081 are equally spaced and connected to each other by transverse rods 1083. The inner side of each longitudinal rod 1081 has a groove, and extrusion disc seats 1082 connected by reset shafts are equally spaced inside the groove. The extrusion disc seats 1082 are arranged in a fan shape and have gripping teeth at their top. The extrusion disc seats 1082 inside the longitudinal rods 1081 on both sides are staggered vertically.

[0041] Specifically, firstly, the installation position of the clamping unit 10 is determined according to the different shapes of the workpiece to be processed. During the installation process, the locking seat 101 is engaged with the mounting rectangular hole 63. Then, the mounting plate 102 completes the installation and fixation work between it and the mounting frame 62. When installing, depending on the contact surface and direction with the workpiece, it is necessary to select the side of the fixing frame 103 with the extrusion component facing the workpiece. Then, the pneumatic rods 109 inside each fixing frame 103 are controlled to work, so that they drive the sliding seat 106 to descend outside the middle sliding rod 104. When the sliding seat 106 descends, it will drive the rotating rod 107 to move. The rotation of the rotating rod 107 pushes the extrusion frame 108 at its top to move toward the surface of the workpiece. During the movement of the extrusion frame 108, the arc-shaped extrusion disc seat 1082 in the middle of the longitudinal rod 1081 comes into contact with the workpiece. Since the extrusion disc seat 1082 rotates under the action of the reset shaft, it will change its angle according to the shape of the workpiece until it makes surface contact with the surface of the workpiece, thus completing the clamping work. When the workpiece is picked up later, it is only necessary to control the pneumatic rod 109 to rise, which will directly separate the extrusion frame 108 from the surface of the workpiece, thus ensuring that the subsequent workpiece picking is also very convenient.

[0042] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A CNC wire electrical discharge machining (EDM) machine tool, characterized in that, The device includes a wire storage mechanism (1), a cutting body is provided on one side of the wire storage mechanism (1), the cutting body includes a frame (2), a wire feeding mechanism (3), a base (4), a moving worktable (5), a processing worktable (6) and a working fluid circulation unit (7), a frame (2) is provided above one side of the base (4), a wire feeding mechanism (3) is provided on the outside of the frame (2) and connected by a synchronous belt (8), an upper wire frame (11) is provided on one side of the wire feeding mechanism (3), a lower wire frame (12) is provided below the upper wire frame (11), the lower wire frame (12) is fixedly connected to the bottom of the outside of the frame (2), the upper wire frame (11) is slidably connected to the top of the outside of the frame (2), a moving worktable (5) is provided above the base (4) and connected by a first moving mechanism, a processing worktable (6) is provided inside the moving worktable (5) and connected by a second moving mechanism, and moving clamping units (10) are distributed above the processing worktable (6). The clamping unit (10) includes a mounting component at the bottom and a fixing frame (103) at the top. The fixing frame (103) is polygonal in shape, and a pressing component is provided on one side of the polygonal structure.

2. The CNC wire EDM machine tool as described in claim 1, characterized in that: The first and second moving mechanisms have the same structure, and their specific moving principle is based on the movement of a ball screw.

3. The CNC wire EDM machine tool as described in claim 2, characterized in that: The processing workbench (6) includes a mounting base plate (61) and a mounting frame (62). The top of the mounting base plate (61) is detached from the mounting frame (62). A reserved hole (64) is provided in the middle of the mounting frame (62). Rectangular mounting holes (63) are evenly distributed outside the reserved hole (64) for disassembly and assembly with the clamping unit (10).

4. The CNC wire EDM machine tool as described in claim 3, characterized in that: The working fluid circulation unit (7) includes a support base (71), a storage tank (72) and an inlet pipe (73). The top of the support base (71) is provided with a storage tank (72). A pump body is provided outside the storage tank (72), and the water outlet end of the pump body is connected to the outlet pipe (74). The nozzle position at the top of the outlet pipe (74) corresponds to the wire hole at the bottom of the upper wire frame (11).

5. A CNC wire electrical discharge machining center as described in claim 4, characterized in that: The mounting base plate (61) and the mounting frame (62) are hollow in the middle, and an inlet pipe (73) is provided on the lower outer side of the mounting frame (62) to assist the working fluid in recycling.

6. A CNC wire electrical discharge machining center as described in claim 5, characterized in that: The inlet pipe (73) includes a main pipe (731), a telescopic pipe (732), and an outlet branch pipe (733). One side of the main pipe (731) penetrates the outside of the storage tank (72), and the other side is detached from the telescopic pipe (732). The other side of the telescopic pipe (732) is detached from the outlet branch pipe (733), and the outlet branch pipe (733) is evenly spaced outside the mounting frame (62).

7. A CNC wire electrical discharge machining center as described in claim 2, characterized in that: The mounting assembly includes a locking seat (101) and a mounting plate (102). The locking seat (101) engages with the mounting rectangular hole (63), and the mounting plate (102) is provided above the locking seat (101). The mounting plate (102) is detached from and installed on the top of the mounting frame (62).

8. A CNC wire electrical discharge machining center as described in claim 7, characterized in that: The top of the mounting plate (102) is provided with a fixing frame (103), and the hollow structure inside the fixing frame (103) is provided with an extrusion component.

9. A CNC wire electrical discharge machining center as described in claim 8, characterized in that: The extrusion assembly includes a middle slide rod (104), a fixed seat (105), a sliding seat (106), a rotating rod (107), and an extrusion frame (108). The middle slide rod (104) is located at the center of the fixed frame (103), and the sliding seat (106) and the fixed seat (105) are respectively located above and below it. A pneumatic rod (109) is located between the sliding seat (106) and the fixed seat (105). A rotating rod (107) with a shaft connection is provided on the outer side of both the sliding seat (106) and the fixed seat (105), and the top end of the rotating rod (107) is axially connected to the extrusion frame (108).

10. A CNC wire electrical discharge machining center as described in claim 9, characterized in that: The extrusion frame (108) includes a longitudinal rod (1081), an extrusion disc seat (1082), and a transverse rod (1083). Three longitudinal rods (1081) are evenly spaced and connected to each other by the transverse rods (1083). The inner side of the longitudinal rod (1081) is provided with a groove. Extrusion disc seats (1082) connected by a reset shaft are evenly spaced inside the groove. The extrusion disc seats (1082) are arranged in a fan shape and have gripping teeth at their top. The extrusion disc seats (1082) inside the longitudinal rods (1081) on both sides are arranged vertically and horizontally in an alternating manner.

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