A precision medium-speed wire-cutting machine tool that prevents wire breakage

Abstract

The present invention relates to the technical field of precision medium-speed wire-cutting machine tools, specifically a precision medium-speed wire-cutting machine tool with anti-wire breaking, comprising a bed body and a wire transport mechanism installed on the upper left side of the bed body, a second slide rail assembly fixed on the upper right side of the bed body, a column fixed on the bed body on the right rear side of the wire transport mechanism, a lower wire rack fixed below the front side of the column, an upper wire rack connected to the upper front side of the column through a third slide rail assembly, a swing plate for spraying wire cutting liquid is connected below the supporting tube, an electrode wire body is provided on the outside of the wire transport mechanism and the guide wheel assembly and inside the upper spray assembly. The precision medium-speed wire-cutting machine tool with anti-wire breaking improves the cooling effect and cooling efficiency of the electrode wire body, thereby avoiding wire breakage of the electrode wire body due to overheating, facilitating the protection of the electrode wire body, and enabling the precision medium-speed wire-cutting machine tool to perform wire cutting operations well.

Description

Technical Field

[0001] The invention relates to the technical field of precision medium-speed wire-cutting machine tools, in particular to a precision medium-speed wire-cutting machine tool that is wire-break-proof. Background Art

[0002] Precision medium-speed wire cutting machine tools are devices that perform high-precision cutting on workpieces based on the principle of electric spark cutting. The wire speed is between fast wire cutting and slow wire cutting, generally 1-10m / s. This wire cutting method combines the advantages of fast wire cutting and slow wire cutting, and has high processing efficiency while ensuring a certain processing accuracy and surface quality. Therefore, it is widely used in fields such as precision parts and mold processing.

[0003] For example, the patent disclosed in the prior art with the publication number "CN114850599A" is named "A New Wire Cutting Machine Tool", which discloses an X-axis slide and a Y-axis slide slidingly arranged on a T-shaped lower body seat, a V-axis slide, a U-axis slide, a Z-axis slide slidingly arranged on the Y-axis slide, a lower eye mold adjustment mechanism connected to the Y-axis slide, and an upper eye mold adjustment mechanism connected to the axis slide, a column is provided at the top of the Y-axis slide, the top of the column extends forward, the bottom end of the column is connected to the wire feeding mechanism through a lower cantilever, an electrode wire position detection mechanism is provided on the lower side of the column, a wire threading constant tension adjustment mechanism is provided on the upper side of the column, the automatic wire clamping and wire removing mechanism transmits a signal through the electrode wire position detection mechanism, controls the wire threading constant tension adjustment mechanism to adjust the wire head to a suitable position from the automatic wire clamping and wire removing mechanism, and then clamps the wire, a wire threading mechanism is provided on the Z-axis slide. The patent name disclosed in the technology with the publication number "CN116493690A" is "A Precision Medium Wire Cutting Machine Tool", which discloses that an inner tube is installed in the storage seat, and multiple spray heads are installed on the inner wall of the inner tube. A blocking box is provided on one side of the storage seat, and liquid inlet pipes are installed on both sides of the blocking box. One liquid inlet pipe is installed on the cutting fluid pipeline of the machine tool body, and the other liquid inlet pipe is connected to the inner tube and communicated with multiple spray heads. When cutting, the extrusion head is squeezed upward by the workpiece, so that the movement of the blocking frame can drive the two connecting holes to connect with the two liquid inlet pipes, and then the cutting fluid can enter the inner tube through the two liquid inlet pipes and be sprayed out from the multiple spray heads. After the processing is completed, the extrusion head is reset, so that the cutting fluid can be blocked, so that the cutting fluid can be sprayed during processing and automatically closed after processing, thereby effectively saving the use of cutting fluid.

[0004] When the precision medium-speed wire cutting machine tool in the above-mentioned prior art is in use, cutting fluid is sprayed onto the outside of the electrode wire body through multiple spray heads to cool the electrode wire body. However, during the spraying process, due to the small diameter of the electrode wire body, a part of the sprayed cutting fluid will not contact the electrode wire body but will fall directly. This will not only lead to waste of cutting fluid, but also result in poor cooling effect and slow cooling efficiency on the electrode wire body, which takes a long time. As a result, the electrode wire body will break due to overheating, which will in turn affect the wire cutting operation of the precision medium-speed wire cutting machine tool. Therefore, we propose a precision medium-speed wire cutting machine tool that prevents wire breakage in order to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a precision medium-length wire-cutting machine tool that is resistant to wire breakage, so as to solve the problem raised in the above-mentioned background technology that the precision medium-length wire-cutting machine tools currently on the market not only lead to waste of cutting fluid, but also result in poor cooling effect and slow cooling efficiency of the electrode wire body, which takes a long time, thus causing the electrode wire body to break due to overheating, thereby affecting the wire cutting operation of the precision medium-length wire-cutting machine tool.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a precision medium-speed wire-cutting machine tool for preventing wire breakage, comprising a bed body and a wire feeding mechanism installed above the left side of the bed body, a second slide rail assembly is fixed above the right side of the bed body, the first slide rail assembly is slidably connected above the second slide rail assembly, a working chamber is slidably installed above the first slide rail assembly, a vertical column is fixed on the bed body on the right rear side of the wire feeding mechanism, a lower wire rack is fixed below the front side of the column, an upper wire rack is connected to the upper wire rack through a third slide rail assembly above the front side of the column, guide wheel assemblies are installed in the lower wire rack and the upper wire rack, an upper spray assembly is installed below the right side of the upper wire rack through a support frame, a carrying tube is rotatably connected to the lower side of the upper spray assembly, and a swing plate for spraying wire cutting liquid is connected below the carrying tube, and an electrode wire body is provided on the outside of the wire feeding mechanism and the guide wheel assembly and inside the upper spray assembly.

[0007] Preferably, a protective frame is fixed above the working chamber, and an opening and closing door is provided on the right side of the protective frame for facilitating the installation and removal of workpieces. A waste liquid discharge pipe is fixed through the lower right side of the working chamber, and the right end of the lower wire rack is inserted through the left side of the working chamber.

[0008] Preferably, the first slide rail assembly, the second slide rail assembly and the third slide rail assembly have the same structure. The first slide rail assembly, the second slide rail assembly and the third slide rail assembly are grooved and rotatably installed with threaded rods, the outer side of the threaded rods are threadedly connected to sliders, and the bottom surface of the first slide rail assembly and the working chamber and the rear side surface of the upper wire rack are all installed with sliders.

[0009] Preferably, an upper fixing ring and a lower fixing ring are installed on the right side of the support frame from top to bottom in sequence, and an upper spray assembly is fixed through the interior of the upper fixing ring. The interior of the upper spray assembly is hollow and is used to store wire cutting liquid. The upper spray assembly is a hollow tubular structure. A circle of spray holes is provided on the lower inner wall of the upper spray assembly. A first liquid inlet pipe is fixed through the top of the upper spray assembly. The upper end of the first liquid inlet pipe is connected to the external liquid supply mechanism. Both the first liquid inlet pipe and the spray hole are connected to the hollow area inside the upper spray assembly.

[0010] Preferably, the lower fixed ring is arranged on the outside of the swing plate, a circle of vertical plates is installed above the lower fixed ring, and the first magnet block is fixed on the inner side of the vertical plates.

[0011] Preferably, the outer key of the supporting tube is connected to a transmission gear, the bottom surface of the supporting tube is grooved and rotatably mounted with a rotating rod, one end of the rotating rod is nested and connected to the outer side of a vortex spring, the other end of the vortex spring is connected to the inner bottom surface of the supporting tube, and the outer side of the rotating rod passes through the upper inner portion of the swing plate

[0012] A second magnet block is installed on the outer side of the swing plate. The second magnet block and the first magnet block have the same magnetic poles. The number of the first magnet blocks and the number of the second magnet blocks are arranged in a ratio of 3:1.

[0013] Preferably, the swing plate is inclined in a front view and is arranged in an arc shape in a top view, and the swing plate forms a reciprocating swing structure with the rotating rod as the center.

[0014] Preferably, the rear end of the guide wheel assembly on the right side of the upper wire rack passes through the rear side of the upper wire rack, and two toggle rods are installed on the outer side of the rear end of the guide wheel assembly on the right side of the upper wire rack, and the axes of the two toggle rods are collinear;

[0015] A slide rod is installed in a slot on the rear side of the upper wire rack, and a return spring is nested and connected to the outer side of the slide rod;

[0016] A rack assembly is provided on the rear side of the upper wire rack, a connecting frame is fixed on the left side of the rack assembly, a sliding rod is connected through the left end of the connecting frame, and the front side of the rack assembly is meshed with the transmission gear;

[0017] A fan-shaped guide groove is provided inside the upper surface of the rack assembly, and the toggle rod can be rotated into the guide groove to control the left and right reciprocating movement of the rack assembly.

[0018] Preferably, a shielding frame is installed on the outer side of the right end of the swing plate, and a shielding directional tube is fixed through the upper middle position of the shielding frame. The upper part of the shielding frame and the upper and lower parts of the shielding directional tube are all funnel-shaped, and the lower diameter of the shielding frame is larger than the width of the swing plate.

[0019] Preferably, a lower spray assembly is fixed above the shielding frame. The lower spray assembly is arranged in a circular shape, and the interior of the lower spray assembly is arranged in a hollow shape. A second liquid inlet pipe made of a hose material is fixed on the left side of the lower spray assembly. The left end of the second liquid inlet pipe passes through the left side of the working chamber and is connected to the external liquid supply mechanism. An inclined spray pipe is installed above the lower spray assembly, and the electrode wire body is inserted into the interior of the shielding directional tube.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the wire-breaking-proof precision medium-speed WEDM machine tool improves the cooling effect and cooling efficiency of the electrode wire body, thereby preventing the electrode wire body from breaking due to overheating, facilitating the protection of the electrode wire body, and enabling the precision medium-speed WEDM machine tool to perform wire cutting operations well. The specific contents are as follows:

[0021] When the spray hole sprays the wire cutting fluid onto the electrode wire body, a portion of the wire cutting fluid that has not come into contact with the electrode wire body will flow along the upper spray assembly and the inner side wall of the supporting tube onto the inclined swing plate. Later, the swing plate will revolve and rotate back and forth at the same time, so that the wire cutting fluid on the swing plate can be sprayed onto the electrode wire body. This not only solves the waste of cutting fluid, but also improves the cooling effect and efficiency of the electrode wire body, eliminates the need for a long cooling time, thereby avoiding the wire breakage due to overheating of the electrode wire body, and facilitates the protection of the electrode wire body, so that the precision medium-speed wire cutting machine tool can perform wire cutting operations well.

[0022] Furthermore, the guide wheel assembly drives the toggle rod to rotate, so that the toggle rod cooperates with the guide groove to drive the rack assembly to move back and forth left and right, so that the cooperation of the rack assembly and the transmission gear drives the supporting tube to rotate back and forth clockwise and counterclockwise, and the supporting tube drives the swing plate to reciprocate clockwise and counterclockwise. At the same time, through the first magnet block and the second magnet block with the same magnetic poles, the swing plate rotates intermittently with the rotating rod as the center while revolving, without the need for an additional power source, saving energy.

[0023] The lower spray assembly and the spray pipe are used together to spray the wire cutting fluid on the electrode wire body again, and then the impurities and debris on the electrode wire body can be cleaned, so as to avoid the electrode wire body and the guide wheel assembly in the lower wire holder from generating large friction in the later stage, thereby further preventing the electrode wire body from breaking;

[0024] The funnel-shaped shielding frame above can shield part of the wire cutting fluid and debris impurities, preventing part of the wire cutting fluid and debris impurities from contacting the guide wheel assembly in the lower wire frame, thereby protecting the guide wheel assembly in the lower wire frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 This is a rear view structural diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the main cross-sectional structure of the working chamber of the present invention;

[0028] Figure 4 This is a schematic diagram of the bottom wire rack structure of the present invention when viewed from above;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the right end of the upper wire rack of the present invention;

[0030] Figure 6 This is a schematic diagram of the rear cross-sectional structure of the rack assembly of the present invention;

[0031] Figure 7 This is a schematic diagram of the three-dimensional structure of the upper spray assembly of the present invention;

[0032] Figure 8 This is a schematic diagram of the main cross-sectional structure of the upper spray assembly of the present invention;

[0033] Figure 9 This is a bottom view of the structure of the upper spray assembly and the supporting tube separated from each other in the present invention;

[0034] Figure 10 This is a schematic diagram of the three-dimensional structure of the swing plate of the present invention;

[0035] Figure 11 This is a schematic diagram of the three-dimensional structure of the shielding frame of the present invention;

[0036] Figure 12 This is a schematic diagram of the cross-sectional structure of the shielding frame and the lower spray assembly separated according to the present invention.

[0037] In the figure: 1. bed body; 2. first slide rail assembly; 3. second slide rail assembly; 4. working chamber; 41. protection frame; 5. lower wire rack; 6. column; 61. third slide rail assembly; 7. upper wire rack; 71. slide bar; 72. return spring; 8. wire transport mechanism; 9. upper spray assembly; 91. first liquid inlet pipe; 92. spray hole; 10. rack assembly; 101. guide groove; 102. connecting frame; 11. guide wheel assembly; 111. Toggle rod; 12. Electrode wire body; 13. Support frame; 131. Upper fixing ring; 132. Lower fixing ring; 133. Vertical plate; 134. First magnet block; 14. Support tube; 141. Transmission gear; 15. Swing plate; 151. Rotating rod; 152. Second magnet block; 153. Vortex spring; 16. Shielding frame; 161. Lower spraying assembly; 162. Spraying pipe; 163. Shielding directional pipe; 164. Second liquid inlet pipe. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] See also Figures 1-12 , the present invention provides the following technical solutions:

[0040] Embodiment 1: The precision medium-length wire cutting machine with anti-breaking wire in this embodiment can improve the cooling effect and cooling efficiency of the electrode wire body 12, thereby preventing the electrode wire body 12 from breaking due to overheating, so that the precision medium-length wire cutting machine can perform wire cutting operations well. For specific structure, please refer to the attached Figures 1-10 As shown, it includes a bed body 1 and a wire transport mechanism 8 installed on the upper left side of the bed body 1;

[0041] A second slide rail assembly 3 is fixed to the upper right side of the bed body 1, and the first slide rail assembly 2 is slidably connected above the second slide rail assembly 3. A working chamber 4 is slidably installed above the first slide rail assembly 2. A column 6 is fixed to the bed body 1 on the right side of the rear of the wire feeding mechanism 8, and a lower wire rack 5 is fixed below the front side of the column 6. An upper wire rack 7 is connected to the upper front side of the column 6 through a third slide rail assembly 61. Guide wheel assemblies 11 are installed in both the lower wire rack 5 and the upper wire rack 7. An upper spray assembly 9 is installed on the lower right side of the upper wire rack 7 through a support frame 13. A supporting tube 14 is rotatably connected to the lower part of the upper spray assembly 9, and a swing plate 15 for spraying wire cutting liquid is connected below the supporting tube 14. An electrode wire body 12 is provided on the outside of the wire feeding mechanism 8 and the guide wheel assembly 11 and inside the upper spray assembly 9.

[0042] A protective frame 41 is fixed above the working chamber 4, and an opening and closing door is provided on the right side of the protective frame 41 for facilitating the installation and removal of workpieces. A waste liquid discharge pipe is fixed through the lower right side of the working chamber 4, and the right end of the lower wire rack 5 is inserted through the left side of the working chamber 4. The first slide rail assembly 2, the second slide rail assembly 3 and the third slide rail assembly 61 have the same structure. A threaded rod is rotatably installed in the slots of the first slide rail assembly 2, the second slide rail assembly 3 and the third slide rail assembly 61, and a slider is connected to the outer side of the threaded rod. Sliders are installed on the bottom surface of the first slide rail assembly 2 and the working chamber 4 and the rear side of the upper wire rack 7. The right side of the support frame 13 is sequentially installed with an upper fixing ring 131 and a lower fixing ring from top to bottom. 132. The upper spray assembly 9 is fixed through the interior of the upper fixed ring 131. The interior of the upper spray assembly 9 is hollow and used to store wire cutting liquid. The upper spray assembly 9 is a hollow tubular structure. A circle of spray holes 92 is provided on the lower inner wall of the upper spray assembly 9. The first liquid inlet pipe 91 is fixed through the top of the upper spray assembly 9. The upper end of the first liquid inlet pipe 91 is connected to the external liquid supply mechanism. Both the first liquid inlet pipe 91 and the spray holes 92 are connected to the hollow area inside the upper spray assembly 9. The lower fixed ring 132 is arranged on the outside of the swing plate 15. A circle of vertical plates 133 are installed above the lower fixed ring 132, and a first magnet block 134 is fixed on the inner side of the vertical plates 133.

[0043] The outer key of the supporting tube 14 is connected to the transmission gear 141, and the bottom surface of the supporting tube 14 is grooved and rotatably installed with a rotating rod 151. The outer side of one end of the rotating rod 151 is nested and connected with a vortex spring 153, and the other end of the vortex spring 153 is connected to the bottom surface of the supporting tube 14. The outer side of the rotating rod 151 passes through the upper inner part of the swing plate 15, and the outer side of the swing plate 15 is installed with a second magnet block 152. The second magnet block 152 and the first magnet block 134 have the same magnetic poles. The number of the first magnet block 134 and the number of the second magnet block 152 are arranged in a ratio of 3:1. The swing plate 15 is inclined when viewed from the front, and is arranged in an arc shape when viewed from above. The swing plate 15 forms a reciprocating swing structure with the rotating rod 151 as the center of the circle. The rear end of the guide wheel assembly 11 on the right side of the upper wire rack 7 passes through the rear side of the upper wire rack 7, and two toggle rods 1 are installed on the outer side of the rear end of the guide wheel assembly 11 on the right side of the upper wire rack 7 The cam 71 is connected to the rear end of the gear 71 and the rear end of the gear 72 is connected to the cam 71 by the spring 72.

[0044] First, open the opening and closing door on the right side of the protective frame 41 on the entire precision medium-speed wire cutting machine, and install the workpiece to be cut in the working chamber 4 through the clamping fixture. At this time, the lowest point of the workpiece is higher than the highest point of the lower wire rack 5, and the highest point of the workpiece is lower than the lowest point of the lower fixed ring 132. Then adjust the position of the working chamber 4 through the first slide rail assembly 2 to adjust the cutting position of the workpiece. Then, drive the first slide rail assembly 2 and the working chamber 4 to move together through the second slide rail assembly 3, and adjust the position of the upper wire rack 7 through the third slide rail assembly 61 to facilitate the adjustment of the tension of the electrode wire body 12. At this time, the workpiece can be cut through the electrode wire body 12. , (the first slide rail assembly 2, the second slide rail assembly 3 and the third slide rail assembly 61 are all driven by threaded rods to drive the sliders to slide, thereby driving the first slide rail assembly 2, the working chamber 4 and the upper wire rack 7 to move. The threaded rods can be controlled to rotate manually or by a motor. Since this part is the existing technology, it will not be introduced in detail here). At the same time, the external wire cutting liquid enters the upper spray assembly 9 through the first liquid inlet pipe 91, and then the wire cutting liquid is sprayed toward the electrode wire body 12 through the spray hole 92. At this time, a part of the wire cutting liquid that has not contacted the electrode wire body 12 will flow along the inner side wall of the upper spray assembly 9 and the supporting tube 14 to the inner side wall of the inclined swing plate 15 below.

[0045] At the same time, the electrode wire body 12 drives the guide wheel assembly 11 on the right side of the upper wire rack 7 to rotate, and the rear end of the guide wheel assembly 11 drives the toggle rod 111 to rotate, and one of the toggle rods 111 rotates into the fan-shaped guide groove 101. At this time, one toggle rod 111 continues to rotate to drive the rack assembly 10 to move to the left. At this time, the connecting frame 102 on the left side of the rack assembly 10 slides on the outside of the slide rod 71, and the return spring 72 accumulates force. When a toggle rod 111 rotates to separate from the rack assembly 10, the rack assembly 10 is reset to the right by the stored force of the return spring 72. This is repeated, causing the rack assembly 10 to move back and forth left and right, thereby causing the rack assembly 10 to drive the transmission gear 141, the supporting tube 14 and the swing plate 15 to rotate reciprocatingly clockwise and counterclockwise. When the swing plate 1 When the swing plate 15 rotates to a position corresponding to the vertical plate 133, a repulsive force is generated by the first magnet block 134 and the second magnet block 152 having the same magnetic poles, thereby causing the swing plate 15 to rotate inward with the rotating rod 151 as the center. At this time, the vortex spring 153 stores force. When the swing plate 15 rotates to a position not corresponding to the vertical plate 133, the stored force of the vortex spring 153 automatically drives the swing plate 15 to rotate outward with the rotating rod 151 as the center. This operation is repeated, causing the swing plate 15 to rotate and swing back and forth with the rotating rod 151 as the center. Therefore, the swing plate 15 revolves and rotates back and forth at the same time, spraying the wire cutting liquid on the swing plate 15 onto the wire electrode body 12, thereby improving the cooling effect and efficiency of the wire electrode body 12. At the same time, no additional power source is required, saving energy.

[0046] Embodiment 2: The precision wire cutting machine with anti-breaking wire in this embodiment can further prevent the wire body 12 from breaking. Figure 11-12As shown, a lower spray assembly 161 is fixed above the shielding frame 16, and the lower spray assembly 161 is arranged in a circular shape. The interior of the lower spray assembly 161 is arranged in a hollow shape. A second liquid inlet pipe 164 made of a hose material is fixed to the left side of the lower spray assembly 161. The left end of the second liquid inlet pipe 164 passes through the left side of the working chamber 4 and is connected to the external liquid supply mechanism. An inclined spray pipe 162 is installed above the lower spray assembly 161, and the interior of the shielding directional pipe 163 is penetrated by the electrode wire body 12. On the basis of Example 1, the lowest point of the workpiece in this embodiment is higher than the highest point of the spray pipe 162, and the precision medium-speed wire cutting machine tool is During the cutting process of the workpiece, the wire cutting fluid from the outside enters the hollow lower spray assembly 161 through the second liquid inlet pipe 164 made of a hose material, and then the wire cutting fluid in the lower spray assembly 161 is sprayed toward the electrode wire body 12 through the inclined spray pipe 162, washing away the debris and impurities adhered to the surface of the electrode wire body 12. At the same time, the washed away debris and impurities can be shielded by the use of the funnel-shaped shielding frame 16 and the shielding directional tube 163 above, avoiding the impurities and debris from contacting the guide wheel assembly 11 in the right end of the lower wire rack 5 and generating a large friction force, thereby further avoiding the breakage of the electrode wire body 12.

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A precision medium-length wire cutting machine tool with an anti-wire breakage function, comprising a bed body (1) and a wire transport mechanism (8) mounted on the upper left side of the bed body (1); A second slide rail assembly (3) is fixed above the right side of the bed body (1); Its characteristics are: The second slide rail assembly (3) is slidably connected to the first slide rail assembly (2) above, and a working chamber (4) is slidably mounted above the first slide rail assembly (2); A column (6) is fixed on the bed body (1) on the right side behind the wire transport mechanism (8), a lower wire rack (5) is fixed below the front side of the column (6), and an upper wire rack (7) is connected above the front side of the column (6) via a third slide rail assembly (61); A guide wheel assembly (11) is installed in both the lower wire rack (5) and the upper wire rack (7); An upper spray assembly (9) is installed below the right side of the upper wire rack (7) through a support frame (13), a support pipe (14) is connected below the upper spray assembly (9), and a swing plate (15) for spraying the wire cutting liquid is connected below the support pipe (14); An electrode wire body (12) is provided on the outside of the wire transport mechanism (8) and the guide wheel assembly (11) and inside the upper spray assembly (9); The right side of the support frame (13) is sequentially mounted with an upper fixing ring (131) and a lower fixing ring (132) from top to bottom. The interior of the upper fixing ring (131) is penetrated and fixed with an upper spray assembly (9). The interior of the upper spray assembly (9) is hollow. The upper spray assembly (9) is a hollow tubular structure. A circle of spray holes (92) is provided on the lower inner side wall of the upper spray assembly (9). A first liquid inlet pipe (91) is penetrated and fixed above the upper spray assembly (9). The upper end of the first liquid inlet pipe (91) is connected to an external liquid supply mechanism. Both the first liquid inlet pipe (91) and the spray hole (92) are connected to the hollow interior of the upper spray assembly (9). The lower fixing ring (132) is arranged on the outer side of the swing plate (15), a circle of vertical plates (133) are installed above the lower fixing ring (132), and a first magnet block (134) is fixed on the inner side of the vertical plates (133). The outer side of the supporting tube (14) is keyed to a transmission gear (141), and a rotating rod (151) is rotatably installed on a grooved bottom surface of the supporting tube (14). A vortex spring (153) is nested and connected to the outer side of one end of the rotating rod (151), and the other end of the vortex spring (153) is connected to the inner side of the bottom surface of the supporting tube (14). The outer side of the rotating rod (151) passes through the upper inner side of the swing plate (15); A second magnet block (152) is installed on the outer side of the swing plate (15), and the second magnet block (152) and the first magnet block (134) have the same magnetic poles. The number of the first magnet blocks (134) and the number of the second magnet blocks (152) are arranged in a ratio of 3:

1. A rack assembly (10) is provided on the rear side of the upper wire rack (7), and a connecting frame (102) is fixed on the left side of the rack assembly (10). A sliding rod (71) is connected to the left end of the connecting frame (102), and the front side of the rack assembly (10) is meshed with the transmission gear (141).

2. The wire-breaking-proof precision medium-speed wire cutting machine tool according to claim 1, characterized in that: A protective frame (41) is fixed above the working chamber (4), an opening and closing door is provided on the right side of the protective frame (41), a waste liquid discharge pipe is fixed through the lower right side of the working chamber (4), and the right end of the lower wire rack (5) is inserted through the left side of the working chamber (4).

3. The wire-breaking-proof precision medium-speed wire cutting machine tool according to claim 1, characterized in that: The first slide rail assembly (2), the second slide rail assembly (3) and the third slide rail assembly (61) have the same structure. The first slide rail assembly (2), the second slide rail assembly (3) and the third slide rail assembly (61) are grooved and rotatably installed with threaded rods, and the outer sides of the threaded rods are threadedly connected to sliders. The bottom surfaces of the first slide rail assembly (2) and the working chamber (4) and the rear side surface of the upper wire rack (7) are all installed with sliders.

4. The wire-breaking-proof precision medium-speed wire cutting machine tool according to claim 1, characterized in that: The swing plate (15) is tilted in a front view and is arranged in an arc shape in a top view. The swing plate (15) forms a reciprocating swing structure with the rotating rod (151) as the center of the circle.

5. The wire-breaking-proof precision medium-speed wire cutting machine tool according to claim 1, characterized in that: The rear end of the guide wheel assembly (11) on the right side of the upper wire rack (7) passes through the rear side of the upper wire rack (7), and two toggle rods (111) are installed on the outer side of the rear end of the guide wheel assembly (11) on the right side of the upper wire rack (7), and the axes of the two toggle rods (111) are collinear; A slide bar (71) is installed in a slot on the rear side of the upper wire rack (7), and a return spring (72) is nested and connected to the outer side of the slide bar (71); A guide groove (101) with a fan-shaped structure is provided inside the upper surface of the rack assembly (10), and the toggle rod (111) can be rotated into the guide groove (101) to control the reciprocating movement of the rack assembly (10) left and right.

6. The wire-breaking-proof precision medium-speed wire cutting machine tool according to claim 1, characterized in that: A shielding frame (16) is installed on the outer side of the right end of the swing plate (15), and a shielding directional tube (163) is fixed through the upper middle position of the shielding frame (16). The upper part of the shielding frame (16) and the upper and lower parts of the shielding directional tube (163) are all arranged in a funnel shape, and the lower diameter of the shielding frame (16) is greater than the width of the swing plate (15).

7. The wire-breaking-proof precision medium-speed wire cutting machine tool according to claim 6, characterized in that: A lower spray assembly (161) is fixed above the shielding frame (16), and the lower spray assembly (161) is provided. The interior of the lower spray assembly (161) is hollow. A second liquid inlet pipe (164) made of a hose is fixed on the left side of the lower spray assembly (161). The left end of the second liquid inlet pipe (164) passes through the left side of the working chamber (4) and is connected to the external liquid supply mechanism. An inclined spray pipe (162) is installed above the lower spray assembly (161), and the interior of the shielding directional pipe (163) is penetrated by the electrode wire body (12).

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