High-precision numerical control spark machine

Abstract

The utility model discloses a high accuracy numerical control spark machine belongs to the technical field of mould processing equipment, it includes: support rack, clamping frock, gantry crane, horizontal screw rod drive mechanism, longitudinal screw rod drive mechanism, perpendicular screw rod drive mechanism and electric spark processing structure, the clamping frock is set up on the support rack, and the gantry crane is set up on the both sides of support rack, horizontal screw rod drive mechanism is connected with the gantry crane, longitudinal screw rod drive mechanism sets up on horizontal screw rod drive mechanism, and horizontal screw rod drive mechanism is connected with longitudinal screw rod drive mechanism drive, perpendicular screw rod drive mechanism sets up in the side of longitudinal screw rod drive mechanism, and longitudinal screw rod drive mechanism is connected with perpendicular screw rod drive mechanism drive, and electric spark processing structure is movably set up in the top of clamping frock, and perpendicular screw rod drive mechanism is connected with electric spark processing structure drive, the utility model solves how to improve the technical problem of the machining accuracy of spark machine in injection mould manufacturing.

Description

Technical Field

[0001] This utility model relates to the technical field of mold processing equipment, and in particular to a high-precision CNC EDM machine. Background Technology

[0002] Injection mold processing is a precision technology that uses mold design and manufacturing to mold molten plastic into products of specific shapes. It is widely used in the automotive, electronics, and medical fields. Its core process covers three stages: mold design, manufacturing, and injection molding. It requires the combination of high-precision processing equipment and strict process parameter control to ensure product quality and production efficiency.

[0003] In the injection mold manufacturing process, mold making is the core step in realizing the design, relying on high-precision machining technology. For example, in the rough machining process of mold making, lathes, milling machines, and other equipment can be used to initially cut the mold material, forming the approximate outline of the cavity and core, and completing basic structural machining such as drilling and grooving. In the finishing process, CNC machine tools, electrical discharge machining (EDM), and other technologies can be used to refine the mold surface, ensuring dimensional tolerances (typically ±0.01mm) and surface finish. For example, EDM can use copper electrodes and current to etch the mold, thereby realizing the complex shapes in the mold design. After that, heat treatment, surface treatment, assembly, and testing are also required.

[0004] Based on this, Chinese patent CN107971593B discloses an electrical discharge electrode, which includes an electrode body, a base plate, and four side plates. The four side plates are connected end-to-end and respectively connected to the edges of the base plate. An inner cavity is formed between the base plate and the four side plates. The base plate includes a front mold core discharge surface facing away from the inner cavity for machining the front mold core forming surface in an injection mold. Each side plate includes a sliding discharge surface facing away from the inner cavity for machining the sliding part forming surface in the injection mold. The end faces of the four side plates away from the base plate are connected to each other to form a rear mold insert discharge surface for machining the rear mold insert forming surface in the injection mold. The electrical discharge electrode disclosed in this patent document can save materials and has smaller tolerances between the six forming surfaces, thus reducing the parting line of the shell injected by the injection mold and ensuring the consistency of the spark pattern surface of the shell.

[0005] However, existing electrical discharge machining (EDM) methods still suffer from insufficient control precision. Specifically, an EDM machine is a special device that processes conductive materials through electro-erosion caused by pulsed discharge. In the EDM process of injection molds, it is typically necessary to control the mold's dimensional tolerances within ±0.01mm. Therefore, when using an EDM machine to process molds, the movement precision of the EDM head should be maximized to ensure the accuracy of the EDM head's processing position, thereby ensuring that the actual dimensions of the processed mold meet the design requirements. Utility Model Content

[0006] Therefore, it is necessary to provide a high-precision CNC EDM machine to address the technical problem of how to improve the machining accuracy of EDM machines in injection mold manufacturing.

[0007] A high-precision CNC EDM machine includes: a support frame, a clamping fixture, a gantry crane, a transverse lead screw drive mechanism, a longitudinal lead screw drive mechanism, a vertical lead screw drive mechanism, and an EDM structure. The clamping fixture is mounted on the support frame, and the gantry crane spans both sides of the support frame. The transverse lead screw drive mechanism is positioned above the clamping fixture and connected to the gantry crane. The longitudinal lead screw drive mechanism is positioned above the transverse lead screw drive mechanism and is driven to the longitudinal lead screw drive mechanism. The vertical lead screw drive mechanism is positioned to the side of the longitudinal lead screw drive mechanism and is driven to the vertical lead screw drive mechanism. The EDM structure is movably positioned above the clamping fixture, and the vertical lead screw drive mechanism is driven to the EDM structure.

[0008] Furthermore, the transverse lead screw drive mechanism includes a transverse support frame, a transverse drive motor, a transverse drive lead screw, a transverse linear guide, a transverse moving platform, and a transverse drive lead screw nut.

[0009] Furthermore, the transverse support frame is mounted on the gantry crane, and the transverse drive motor is connected to one end of the transverse support frame; the transverse drive screw is movably mounted within the transverse support frame, and the transverse drive motor is driven by the transverse drive screw.

[0010] Furthermore, the two transverse rails are arranged opposite to each other in the transverse support frame, and the transverse moving platform is movably arranged on the two transverse rails; the transverse drive screw is connected to the lower part of the transverse moving platform, and the transverse drive screw is drivenly connected to the transverse drive screw.

[0011] Furthermore, the longitudinal lead screw drive mechanism includes a longitudinal support connecting block, a longitudinal connecting frame, a longitudinal drive motor, a longitudinal drive lead screw, a longitudinal guide rail, and a longitudinal drive lead screw nut.

[0012] Furthermore, the longitudinal support connecting block is connected to the transverse moving platform, and the longitudinal connecting frame is movably disposed above the longitudinal support connecting block; one end of the longitudinal connecting frame is provided with the longitudinal drive motor, and the other end of the longitudinal connecting frame is provided with the vertical lead screw drive mechanism.

[0013] Furthermore, the longitudinal drive screw is movably disposed within the longitudinal connecting frame, and the longitudinal drive motor is drivenly connected to the longitudinal drive screw; the longitudinal guide rail is connected within the longitudinal connecting frame, the longitudinal drive screw nut is movably connected to the longitudinal guide rail, and the longitudinal drive screw nut is connected to the longitudinal support connecting block.

[0014] Furthermore, the vertical lead screw drive mechanism includes a vertical support frame, a vertical drive motor, a vertical drive lead screw, a vertical linear guide, and a vertical lead screw moving part.

[0015] Furthermore, the vertical support frame is connected to one end of the longitudinal connecting frame, and the vertical drive motor is connected to the top of the vertical support frame; the vertical drive screw is movably disposed within the vertical support frame, and the vertical drive motor is drivenly connected to the vertical drive screw.

[0016] Furthermore, the vertical linear guide is disposed within the vertical support frame, the vertical nut moving part is movably connected to the vertical linear guide, and the vertical drive screw is drivenly connected to the vertical nut moving part; the vertical nut moving part is connected to the electrical discharge machining structure.

[0017] In summary, this utility model discloses a high-precision CNC EDM machine comprising a support frame, a clamping fixture, a gantry crane, a transverse lead screw drive mechanism, a longitudinal lead screw drive mechanism, a vertical lead screw drive mechanism, and an EDM structure. The clamping fixture is mounted on the support frame, and the gantry crane spans both sides of the support frame. The transverse lead screw drive mechanism is positioned above the clamping fixture and connected to the gantry crane. The longitudinal lead screw drive mechanism is positioned above the transverse lead screw drive mechanism and is driven to the longitudinal lead screw drive mechanism. The vertical lead screw drive mechanism is positioned to the side of the longitudinal lead screw drive mechanism and is driven to the vertical lead screw drive mechanism. The EDM structure is movably positioned above the clamping fixture, and the vertical lead screw drive mechanism is driven to the EDM structure. This invention relates to a high-precision CNC EDM machine that uses a lead screw drive structure to precisely drive the EDM mechanism to the workpiece's machining position according to a preset CNC program. This avoids the inaccuracies in positioning caused by manual positioning or cylinder drive in existing technologies. Therefore, this high-precision CNC EDM machine solves the technical problem of improving the machining accuracy of EDM machines in injection mold manufacturing. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a high-precision CNC EDM machine according to the present invention; Figure 2 This is a structural schematic diagram of another part of the high-precision CNC EDM machine according to this utility model; Figure 3 This is an exploded structural diagram of another part of the structure of a high-precision CNC EDM machine according to this utility model. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Please refer to the following: Figures 1 to 3 This utility model discloses a high-precision CNC EDM machine, comprising: a support frame 1, a clamping fixture 2, a gantry crane 3, a transverse lead screw drive mechanism 4, a longitudinal lead screw drive mechanism 5, a vertical lead screw drive mechanism 6, and an EDM structure 7. The clamping fixture 2 is mounted on the support frame 1, and the gantry crane 3 spans across both sides of the support frame 1. The transverse lead screw drive mechanism 4 is positioned above the clamping fixture 2 and is connected to the gantry crane 3. The longitudinal lead screw drive mechanism 5 is positioned above the transverse lead screw drive mechanism 4 and is driven to the longitudinal lead screw drive mechanism 5. The vertical lead screw drive mechanism 6 is positioned to the side of the longitudinal lead screw drive mechanism 5 and is driven to the vertical lead screw drive mechanism 6. The EDM structure 7 is movably positioned above the clamping fixture 2, and the vertical lead screw drive mechanism 6 is driven to the EDM structure 7.

[0026] Specifically, when the high-precision CNC EDM machine of this invention is in operation, the workpiece, such as a mold, to be EDM-processed can be placed in the clamping fixture 2, and the clamping fixture 2 stably clamps the workpiece. A CNC module 8 is installed in the support frame 1, and a display unit 9 is also installed on the side of the support frame 1. The CNC module 8 is connected to the transverse lead screw drive mechanism 4, the longitudinal lead screw drive mechanism 5, the vertical lead screw drive mechanism 6, the EDM structure 7, and the display unit 9. The CNC module 8 is used to electrically control the movement of each component, and the display unit 9 is used to display the parameters during EDM. Users can also connect external input elements such as a keyboard to interact with and control the CNC module 8. Therefore, when EDM machining of the EDM structure 7 begins, the EDM structure 7 automatically finds its origin under the control of the CNC module 8. Then, the transverse lead screw drive mechanism 4 and the longitudinal lead screw drive mechanism 5 respectively drive the vertical lead screw drive mechanism 6 to move the EDM structure 7 horizontally and vertically above the workpiece to be machined. Next, the vertical lead screw drive mechanism 6 drives the EDM structure 7 downward to the workpiece's machining position, so that the EDM structure 7 can perform EDM machining on the workpiece. Thus, this high-precision CNC EDM machine can precisely drive the EDM structure 7 to the workpiece's machining position according to a preset CNC program through a lead screw transmission structure; it avoids the inaccurate positioning defects caused by manual positioning or cylinder drive in existing technologies. Therefore, this high-precision CNC EDM machine solves the technical problem of how to improve the machining accuracy of EDM machines in injection mold manufacturing.

[0027] Furthermore, the clamping fixture 2 includes a fixture base 201, a plurality of clamping guide rails 202, and a plurality of clamps 203. The fixture base 201 is disposed on the support frame 1, and the plurality of clamping guide rails 202 are evenly distributed on the fixture base 201, with a plurality of clamps 203 evenly distributed on each clamping guide rail 202. Specifically, the operator can place the workpiece to be processed on the fixture base 201 so that the clamps 203 can limit and clamp the workpiece. Specifically, the clamps 203 can move along the clamping guide rails 202 and are fixed by bolts or other fasteners after reaching a preset position.

[0028] Furthermore, the transverse screw drive mechanism 4 includes a transverse support frame 401, a transverse drive motor 402, a transverse drive screw 403, transverse linear rails 404, a transverse moving platform 405, and a transverse drive screw nut 406; the transverse support frame 401 is disposed on the gantry crane 3, and the transverse drive motor 402 is connected to one end of the transverse support frame 401; the transverse drive screw 403 is movably disposed within the transverse support frame 401, and the transverse drive motor 402 is drivenly connected to the transverse drive screw 403; the two transverse linear rails 404 are disposed opposite to each other within the transverse support frame 401, and the transverse moving platform 405 is movably disposed on the two transverse linear rails 404; the transverse drive screw nut 406 is connected below the transverse moving platform 405, and the transverse drive screw 403 is drivenly connected to the transverse drive screw nut 406.

[0029] Furthermore, the longitudinal lead screw drive mechanism 5 includes a longitudinal support connecting block 501, a longitudinal connecting frame 502, a longitudinal drive motor 503, a longitudinal drive lead screw 504, a longitudinal guide rail 505, and a longitudinal drive lead screw nut 506; the longitudinal support connecting block 501 is connected to the transverse moving platform 405, and the longitudinal connecting frame 502 is movably disposed above the longitudinal support connecting block 501; the longitudinal drive motor 503 is disposed at one end of the longitudinal connecting frame 502, and the vertical lead screw drive mechanism 6 is disposed at the other end of the longitudinal connecting frame 502; the longitudinal drive lead screw 504 is movably disposed within the longitudinal connecting frame 502, and the longitudinal drive motor 503 is drivenly connected to the longitudinal drive lead screw 504; the longitudinal guide rail 505 is connected within the longitudinal connecting frame 502, the longitudinal drive lead screw nut 506 is movably connected to the longitudinal guide rail 505, and the longitudinal drive lead screw nut 506 is connected to the longitudinal support connecting block 501.

[0030] Furthermore, the vertical lead screw drive mechanism 6 includes a vertical support frame 601, a vertical drive motor 602, a vertical drive lead screw 603, a vertical linear guide 604, and a vertical lead screw nut moving part 605; the vertical support frame 601 is connected to one end of the longitudinal connecting frame 502, and the vertical drive motor 602 is connected to the top of the vertical support frame 601; the vertical drive lead screw 603 is movably disposed within the vertical support frame 601, and the vertical drive motor 602 is drivenly connected to the vertical drive lead screw 603; the vertical linear guide 604 is disposed within the vertical support frame 601, and the vertical lead screw nut moving part 605 is movably connected to the vertical linear guide 604, and the vertical drive lead screw 603 is drivenly connected to the vertical lead screw nut moving part 605; the vertical lead screw nut moving part 605 is connected to the electrical discharge machining structure 7.

[0031] Furthermore, the electrical discharge machining structure 7 includes a wire spool 701, an electrode wire 702, a wire feeding structure 703, and a wire guiding structure 704; the wire spool 701 is connected to the side of the vertical wire nut moving part 605, and the electrode wire 702 is connected to the wire spool 701; the wire feeding structure 703 is disposed on the side of the wire spool 701, and the wire feeding structure 703 is drivenly connected to the electrode wire 702; the wire guiding structure 704 is disposed on the other side of the wire spool 701 opposite to the wire feeding structure 703, and the electrode wire 702 is movably connected to the wire guiding structure 704.

[0032] Specifically, after the transverse drive motor 402 is powered on and started, it can drive the transverse drive screw 403 to rotate forward or reverse. Thus, the transverse drive screw 403 drives the transverse drive nut 406 to drive the transverse moving platform 405 to reciprocate laterally along the limiting guide of the transverse rail 404. When the transverse moving platform 405 moves laterally, it can drive the longitudinal support connecting block 501, so that the longitudinal screw drive mechanism 5 can follow it to reciprocate laterally.

[0033] Furthermore, when the longitudinal drive motor 503 is powered on and started, it can drive the longitudinal drive screw 504 to rotate forward or reverse, thereby driving the longitudinal drive nut 506 to reciprocate longitudinally along the limit of the longitudinal guide rail 505. Unlike the operation mode of the transverse screw drive mechanism 4, in the longitudinal screw drive mechanism 5, when the longitudinal drive nut 506 is driven by the longitudinal drive screw 504, it remains stationary relative to the transverse moving platform 405, causing the longitudinal drive nut 506 to move relative to the longitudinal drive screw 504, causing the longitudinal drive screw 504 to drive the longitudinal connecting frame 502 to reciprocate longitudinally; and when the longitudinal connecting frame 502 moves, it can drive the vertical support frame 601 to move longitudinally.

[0034] Furthermore, after the vertical drive motor 602 is powered on and started, it can drive the vertical drive screw 603 to rotate forward or reverse, thereby causing the vertical drive screw 603 to drive the vertical nut moving part 605 to reciprocate upward or downward along the limit of the vertical rail 604; thus, the vertical nut moving part 605 drives the wire drum 701 together with the electrode wire 702 to move upward or downward, and the electrode wire 702 can perform electrical discharge machining on the workpiece. The wire conveying structure 703 can be used to retrieve the electrode wire 702 or to guide it out of the wire drum 701; the wire guiding structure 704 is used to correct the machining position of the electrode wire 702.

[0035] In summary, this utility model discloses a high-precision CNC EDM machine comprising a support frame 1, a clamping fixture 2, a gantry crane 3, a transverse lead screw drive mechanism 4, a longitudinal lead screw drive mechanism 5, a vertical lead screw drive mechanism 6, and an EDM structure 7. The clamping fixture 2 is mounted on the support frame 1, and the gantry crane 3 spans across both sides of the support frame 1. The transverse lead screw drive mechanism 4 is positioned above the clamping fixture 2 and is connected to the gantry crane 3. The longitudinal lead screw drive mechanism 5 is positioned above the transverse lead screw drive mechanism 4 and is driven to the longitudinal lead screw drive mechanism 5. The vertical lead screw drive mechanism 6 is positioned to the side of the longitudinal lead screw drive mechanism 5 and is driven to the vertical lead screw drive mechanism 6. The EDM structure 7 is movably positioned above the clamping fixture 2, and the vertical lead screw drive mechanism 6 is driven to the EDM structure 7. This invention discloses a high-precision CNC EDM machine that uses a lead screw drive structure to precisely drive the EDM mechanism 7 to the workpiece's machining position according to a preset CNC program. This avoids the inaccurate positioning caused by manual positioning or cylinder drive in existing technologies. Therefore, this invention solves the technical problem of improving the machining accuracy of EDM machines in injection mold manufacturing.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-precision CNC EDM machine, characterized in that, It includes: a support frame (1), a clamping fixture (2), a gantry crane (3), a transverse lead screw drive mechanism (4), a longitudinal lead screw drive mechanism (5), a vertical lead screw drive mechanism (6), and an electrical discharge machining structure (7); the clamping fixture (2) is mounted on the support frame (1), and the gantry crane (3) is erected on both sides of the support frame (1); the transverse lead screw drive mechanism (4) is mounted above the clamping fixture (2), and the transverse lead screw drive mechanism (4) is connected to the gantry crane (3); the longitudinal lead screw drive mechanism (5) is mounted on the support frame (1), the clamping fixture (2) is mounted on the support frame (1), the gantry crane (3) is erected on both sides of the support frame (1); the transverse lead screw drive mechanism (4) is mounted on the support frame (1), the clamping fixture (2) is mounted on the support frame (1), the gantry crane (3) is erected on both sides of the support frame (1); the transverse lead screw drive mechanism (4) is mounted on the support frame (1), the clamping fixture (2) is mounted on the support frame (1), the gantry crane (3) is erected on both sides of the support frame (1), the gantry crane (5) is erected on both sides of the support frame (1), the gantry crane (6 ...6) is erected on both sides of the support frame (1), the gantry crane (7) is erected on both sides A lead screw drive mechanism (5) is disposed above the transverse lead screw drive mechanism (4), and the transverse lead screw drive mechanism (4) is driven to be connected to the longitudinal lead screw drive mechanism (5); a vertical lead screw drive mechanism (6) is disposed on the side of the longitudinal lead screw drive mechanism (5), and the longitudinal lead screw drive mechanism (5) is driven to be connected to the vertical lead screw drive mechanism (6); an electrical discharge machining structure (7) is movably disposed above the clamping fixture (2), and the vertical lead screw drive mechanism (6) is driven to be connected to the electrical discharge machining structure (7).

2. A high-precision CNC EDM machine according to claim 1, characterized in that: The transverse lead screw drive mechanism (4) includes a transverse support frame (401), a transverse drive motor (402), a transverse drive lead screw (403), a transverse linear guide (404), a transverse moving platform (405), and a transverse drive lead screw nut (406).

3. A high-precision CNC EDM machine according to claim 2, characterized in that: The transverse support frame (401) is mounted on the gantry crane (3), and the transverse drive motor (402) is connected to one end of the transverse support frame (401); the transverse drive screw (403) is movably mounted in the transverse support frame (401), and the transverse drive motor (402) is drivenly connected to the transverse drive screw (403).

4. A high-precision CNC EDM machine according to claim 3, characterized in that: The two transverse linear rails (404) are disposed opposite to each other in the transverse support frame (401), and the transverse moving platform (405) is movably disposed on the two transverse linear rails (404); the transverse drive screw (406) is connected to the transverse moving platform (405), and the transverse drive screw (403) is drivenly connected to the transverse drive screw (406).

5. A high-precision CNC EDM machine according to claim 4, characterized in that: The longitudinal lead screw drive mechanism (5) includes a longitudinal support connecting block (501), a longitudinal connecting frame (502), a longitudinal drive motor (503), a longitudinal drive lead screw (504), a longitudinal guide rail (505), and a longitudinal drive lead screw nut (506).

6. A high-precision CNC EDM machine according to claim 5, characterized in that: The longitudinal support connecting block (501) is connected to the transverse moving platform (405), and the longitudinal connecting frame (502) is movably disposed above the longitudinal support connecting block (501); the longitudinal drive motor (503) is disposed at one end of the longitudinal connecting frame (502), and the vertical lead screw drive mechanism (6) is disposed at the other end of the longitudinal connecting frame (502).

7. A high-precision CNC EDM machine according to claim 6, characterized in that: The longitudinal drive screw (504) is movably disposed in the longitudinal connecting frame (502), and the longitudinal drive motor (503) is drivenly connected to the longitudinal drive screw (504); the longitudinal guide rail (505) is connected to the longitudinal connecting frame (502), the longitudinal drive screw nut (506) is movably connected to the longitudinal guide rail (505), and the longitudinal drive screw nut (506) is connected to the longitudinal support connecting block (501).

8. A high-precision CNC EDM machine according to claim 7, characterized in that: The vertical lead screw drive mechanism (6) includes a vertical support frame (601), a vertical drive motor (602), a vertical drive lead screw (603), a vertical linear guide (604), and a vertical lead screw moving part (605).

9. A high-precision CNC EDM machine according to claim 8, characterized in that: The vertical support frame (601) is connected to one end of the longitudinal connecting frame (502), and the vertical drive motor (602) is connected to the top of the vertical support frame (601); the vertical drive screw (603) is movably disposed in the vertical support frame (601), and the vertical drive motor (602) is drivenly connected to the vertical drive screw (603).

10. A high-precision CNC EDM machine according to claim 9, characterized in that: The vertical linear guide (604) is disposed in the vertical support frame (601), the vertical nut moving part (605) is movably connected to the vertical linear guide (604), the vertical drive screw (603) is drivenly connected to the vertical nut moving part (605), and the vertical nut moving part (605) is connected to the electrical discharge machining structure (7).

Images