A wire cut electrical discharge machine tool smoke protection device

Abstract

The application discloses an electric spark wire cutting machine tool smoke protection device, and particularly relates to the field of machining, which comprises a protection box, the front and back sides of the protection box are provided with sealed doors, and the inside of the protection box is provided with a cutting machine tool body; a smoke filtering mechanism is arranged on the top of the protection box, and the smoke filtering mechanism comprises a sliding groove arranged on the top of the protection box. The air inlet end of a fan draws the smoke and particulate matter generated in real time when the cutting machine tool body cuts workpieces through a wind pipe, a filtering box, a folding pipe, a connecting pipe, a hose and an air inlet pipe; meanwhile, a motor is started through an external power supply, the output end of the motor drives the threaded rod to rotate, thereby driving the connecting block to move left and right and further driving the moving plate, the air inlet pipe and the suction head to move in the same direction, so that the suction head is located at the position closest to the smoke generation position, and the smoke generated in real time can be sucked away. The effect that the suction pipe moves dynamically to attract the smoke is achieved, and the smoke suction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to a dust protection device for wire electrical discharge machining (EDM) machines. Background Technology

[0002] In the field of modern precision manufacturing, wire electrical discharge machining (EDM) technology has become a key process in high-end industries such as mold manufacturing and aerospace due to its ability to precisely process workpieces with high hardness and complex shapes. However, during the operation of this efficient processing technology, the high-frequency discharge between the electrode wire and the workpiece generates a large amount of fumes, which not only contain metal oxide particles (such as oxides of iron, copper, and molybdenum), but also oil mist formed by the high-temperature atomization of emulsions and trace amounts of volatile organic compounds (VOCs). If these fumes are emitted directly without treatment, the metal particles will become a potential source of atmospheric particulate matter (PM2.5, PM10), while the oil mist and VOCs may participate in photochemical reactions, exacerbating ozone pollution and haze, causing cumulative damage to the atmospheric environment.

[0003] With increasingly stringent environmental regulations and the deepening of the "green manufacturing" concept, how to effectively control smoke pollution during the wire EDM process has become a problem that the industry must solve for sustainable development.

[0004] Chinese patent publication number CN218135530U discloses a protective device for wire EDM machines, filed on June 7, 2022. This patented technology conveniently utilizes a protective cover to protect the machining table, isolating it from the outside environment during wire EDM with good protection. The protective cover features a filter box, filter screen, and exhaust pipe on its side wall. A fan extracts fumes from inside the cover, preventing harm to personnel. The fumes are filtered through the filter screen, separating impurities and reducing air pollution. However, the exhaust pipe in this device is fixed in position. Due to the nature of wire EDM, the electrode wire needs to move along a preset trajectory (e.g., moving in conjunction with the X / Y axes of the worktable to complete complex cuts such as straight lines and arcs), meaning the point of fume generation is constantly changing. The fixed suction tube can only cover a limited area. When the cutting point deviates from the effective suction range of the suction tube, a large amount of smoke will spread in the protective space, causing a sharp drop in collection efficiency. The inventors provide a smoke and dust protection device for wire EDM machines to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide a smoke and dust protection device for wire EDM machines, which achieves the effect of dynamically moving the suction tube to attract smoke and improves the smoke attraction efficiency.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A dust protection device for a wire EDM machine includes a protective box with sealed doors on its front and rear sides. The machine body is housed inside the protective box. A dust filtration mechanism is located on the top of the protective box. This mechanism includes a sliding groove on the top of the protective box, with a horizontally movable plate slidably connected to the upper and lower sides of the sliding groove. A sliding seal is provided at the boundary of the movable plate. A negative pressure connecting pipe is fixedly connected to the top of the movable plate, and a flexible hose connected to the connecting pipe is fixedly connected to the bottom of the movable plate. An air inlet pipe is fixedly connected to the bottom of the flexible hose via a flange. A suction head is fixedly connected to the bottom of the air inlet pipe, and a smoke sensor is installed at the boundary of the suction head.

[0008] As a further embodiment of the present invention: a fixed box is fixedly connected to the top of the protective box. The fixed box is hollow inside and open at the front. A threaded rod is rotatably connected to the left and right sides inside the fixed box. A connecting block is threadedly connected to the outer side of the threaded rod. The bottom of the connecting block is fixedly connected to the top of the moving plate. A motor is fixedly connected to the left side of the fixed box. The output end of the motor is fixedly connected to the threaded rod.

[0009] As a further aspect of the present invention, the side of the connecting block is adapted to the internal cross-sectional size of the fixing box.

[0010] As a further embodiment of the present invention: a filter box is fixedly connected to the top left side of the protective box, a removable filter element is installed inside the filter box, a folded pipe is fixedly connected to the air inlet of the filter box, and the other end of the folded pipe is connected to a connecting pipe; a fan is fixedly connected to the top of the protective box, an air duct is fixedly connected to the air inlet of the fan, the other end of the air duct is fixedly connected to the air outlet of the filter box, an exhaust pipe is fixedly connected to the air outlet of the fan, and the exhaust pipe is fixedly connected to the rear side of the protective box.

[0011] As a further embodiment of the present invention: the bottom of the movable plate is provided with an angle adjustment mechanism, the angle adjustment mechanism includes a connecting frame fixedly connected to the bottom of the movable plate, a groove is provided at the connection between the connecting frame and the hose, and arc-shaped grooves are respectively provided on the front and rear sides of the inner side of the connecting frame. Sliding blocks are slidably connected inside the two arc-shaped grooves. Guide rails are fixedly connected to the inner sides of the two sliding blocks. Sliding blocks are slidably connected to the inner sides of the guide rails. A docking block is fixedly connected to the inner side of the sliding block. The inner sides of the two docking blocks are respectively fixedly connected to the outer side of the air intake pipe.

[0012] As a further embodiment of the present invention: an arc-shaped plate is fixedly connected to the front and rear sides of the inner side of the connecting frame, the shape of the arc-shaped plate is adapted to the arc-shaped groove, and a path groove is opened at the top of the arc-shaped plate, passing through the upper and lower sides of the arc-shaped plate; a guide rod is fixedly connected to the bottom of the slider, and the guide rod is slidably connected to the corresponding side path groove.

[0013] As a further embodiment of the present invention, the path grooves are arranged in an "S" shape.

[0014] As a further embodiment of the present invention: a connecting box is fixedly connected to the top of the front and rear sides of the connecting frame respectively. The connecting box is hollow inside and open at the bottom. The left and right sides of the connecting box are rotatably connected to a rotatable threaded rod II. A hollow block is threadedly connected to the outer side of the threaded rod II. The hollow block is hollow inside and open at the bottom, and a sliding rod is slidably connected inside it. The bottom of the sliding rod is hinged to the corresponding sliding block.

[0015] As a further embodiment of the present invention: a rotating rod is rotatably connected to the left side of the connecting box, the rotating rod is fixedly connected to the two ends of the corresponding threaded rod, and synchronous pulleys are fixedly connected to the outer sides of the two rotating rods respectively, and a transmission belt is engaged with the outer sides of the two synchronous pulleys.

[0016] As a further embodiment of the present invention: a support plate is fixedly connected to the left rear end of the connecting frame, and a movable rod passing through the front and rear sides of the support plate is rotatably connected to the support plate. An active bevel gear is fixedly connected to the front of the movable rod, and a driven bevel gear is vertically meshed on the right side of the active bevel gear. The right side of the driven bevel gear is fixedly connected to the left end of the rear movable rod. A gear is fixedly connected to the rear side of the movable rod, and a toothed plate meshes with the top of the gear. The top of the toothed plate is fixedly connected to the surface of the protective box.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This dust protection device for wire EDM machines uses an external power source to start a fan. The fan's inlet draws in smoke and particulate matter generated during the cutting process through ductwork, a filter box, a folded pipe, a connecting pipe, a flexible hose, and an intake pipe. Simultaneously, the external power source starts a motor, which drives a threaded rod to rotate. This rotation moves a connecting block left and right, which in turn moves a moving plate, an intake pipe, and a suction head in the same direction. This positions the suction head as close as possible to the source of the smoke, effectively drawing it away. This dynamic movement of the suction tube improves smoke extraction efficiency.

[0019] Furthermore, the dust protection device for this wire EDM machine operates as follows: When the moving plate moves, it drives the gears to roll along the surface of the gear plate. This, in turn, causes the active bevel gear to rotate in the same direction via the movable rod. The transmission between the active and driven bevel gears then rotates the left rotating rod, which in turn rotates the two threaded rods via the synchronous pulley and transmission belt. This, in turn, moves the two hollow blocks in the same direction as the moving plate. When the moving plate moves to the right, it causes the suction head to move in the same direction. Driven by the hollow blocks, the suction head moves to the right and tilts within the connecting frame, thus multiplying the effect and further expanding the horizontal range of the suction head. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of a dust protection device for a wire EDM machine tool;

[0021] Figure 2 This is a schematic cross-sectional view of the overall structure of a dust protection device for a wire EDM machine tool.

[0022] Figure 3 This is a schematic cross-sectional view of the dust filtration mechanism in a dust protection device for a wire EDM machine tool.

[0023] Figure 4 This is a schematic diagram of the left side of the angle adjustment mechanism in a dust protection device for a wire EDM machine tool.

[0024] Figure 5 This is a schematic cross-sectional view of the angle adjustment mechanism in a dust protection device for a wire EDM machine tool.

[0025] Figure 6 A schematic diagram of the angle adjustment mechanism in a dust protection device for a wire EDM machine tool;

[0026] Figure 7 This is a schematic diagram of the angle adjustment mechanism in a dust protection device for a wire EDM machine tool.

[0027] Figure 8 For a dust protection device for wire EDM machines Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0028] In the diagram: 10. Protective box; 11. Sealed door; 12. Cutting machine body; 20. Smoke and dust filtration mechanism; 201. Sliding groove; 202. Moving plate; 203. Filter box; 204. Fan; 205. Folded tube; 206. Connecting tube; 207. Hose; 208. Air inlet pipe; 209. Suction head; 210. Fixing box; 211. Threaded rod one; 212. Connecting block; 213. Motor; 30. Angle adjustment mechanism; 301. Connecting frame; 30 2. Threaded rod II; 303. Hollow block; 304. Sliding rod; 305. Arc groove; 306. Sliding block; 307. Guide rail; 308. Slider; 309. Connecting block; 310. Arc plate; 311. Guide rod; 312. Rotating rod; 313. Synchronous pulley; 314. Driven bevel gear; 315. Driving bevel gear; 316. Movable rod; 317. Gear; 318. Gear plate; 319. Connecting box; 320. Transmission belt; 321. Support plate. Detailed Implementation

[0029] refer to Figures 1-8 As shown, a dust protection device for an electrical discharge wire cutting machine includes a protective box 10. Sealed doors 11 are provided on the front and rear sides of the protective box 10. The cutting machine body 12 is housed inside the protective box 10. A dust filtration mechanism 20 is provided on the top of the protective box 10. The dust filtration mechanism 20 includes a sliding groove 201 formed on the top of the protective box 10. The upper and lower sides of the sliding groove 201 are connected, and a horizontally movable plate 202 is slidably connected inside the sliding groove 201. A sliding seal is provided at the boundary of the movable plate 202. A negative pressure connecting pipe 206 is fixedly connected to the top of the movable plate 202. A flexible hose 207 connected to the connecting pipe 206 is fixedly connected to the bottom of the movable plate 202. An air inlet pipe 208 is fixedly connected to the bottom of the flexible hose 207 via a flange. A suction head 209 is fixedly connected to the bottom of the air inlet pipe 208. A smoke sensor is installed at the boundary of the suction head 209.

[0030] Preferably, a fixed box 210 is fixedly connected to the top of the protective box 10. The fixed box 210 is hollow inside and open at the front. Threaded rods 211 are rotatably connected to the left and right sides of the fixed box 210. A connecting block 212 is threadedly connected to the outer side of the threaded rods 211. The bottom of the connecting block 212 is fixedly connected to the top of the moving plate 202. A motor 213 is fixedly connected to the left side of the fixed box 210. The output end of the motor 213 is fixedly connected to the threaded rods 211.

[0031] Preferably, the side of the connecting block 212 is adapted to the internal cross-sectional size of the fixing box 210, thereby achieving the effect of guiding the connecting block 212 when it moves.

[0032] Specifically, a filter box 203 is fixedly connected to the top left side of the protective box 10. A removable filter element is installed inside the filter box 203. A folded pipe 205 is fixedly connected to the air inlet of the filter box 203. The other end of the folded pipe 205 is connected to a connecting pipe 206. A fan 204 is fixedly connected to the top of the protective box 10. An air duct is fixedly connected to the air inlet of the fan 204. The other end of the air duct is fixedly connected to the air outlet of the filter box 203. An exhaust pipe is fixedly connected to the air outlet of the fan 204. The exhaust pipe is fixedly connected to the rear side of the protective box 10.

[0033] When the cutting machine body 12 is in use, smoke will rise at the point where the electric spark wire cuts the workpiece. If the smoke is discharged without treatment, the large particles in the smoke will damage the atmosphere. However, when this device is in the face of the smoke generated during cutting, the smoke will be sealed in the protective box 10 due to the sealed structure and will not be discharged directly. Furthermore, the smoke generated during cutting is directly drawn and filtered by the smoke filtration mechanism 20. By using an external power supply to start the fan 204, the air inlet of the fan 204 draws in the smoke and particulate matter generated in real time when the cutting machine body 12 is cutting the workpiece through the air duct, filter box 203, folded pipe 205, connecting pipe 206, hose 207, and air inlet pipe 208. Since the electric spark wire moves when cutting the workpiece, the cutting position will change, and thus the smoke generation position will also be different. The smoke sensor controls the position of the suction head 209 according to the concentration of smoke generated at different positions through the built-in control chip. During the control operation, the motor 213 is started by the external power supply. The output end of the motor 213 drives the threaded rod 211 to rotate, thereby driving the connecting block 212 to move left and right, and thus driving the moving plate 202, air inlet pipe 208 and suction head 209 to move in the same direction, so that the suction head 209 is located closest to the smoke generation position, and can suck away the smoke generated in real time. After being filtered by the filter inside the filter box 203, the smoke is discharged into the protective box 10 through the air outlet pipe of the fan 204.

[0034] refer to Figures 1-8 The bottom of the movable plate 202 is provided with an angle adjustment mechanism 30. The angle adjustment mechanism 30 includes a connecting frame 301 fixedly connected to the bottom of the movable plate 202. A groove is opened at the connection between the connecting frame 301 and the hose 207. Arc-shaped grooves 305 are opened on the front and rear sides of the interior of the connecting frame 301. Sliding blocks 306 are slidably connected inside the two arc-shaped grooves 305. Guide rails 307 are fixedly connected to the inner side of the two sliding blocks 306. A slider 308 is slidably connected to the inner side of the guide rails 307. A docking block 309 is fixedly connected to the inner side of the slider 308. The inner sides of the two docking blocks 309 are fixedly connected to the outer side of the air intake pipe 208.

[0035] Furthermore, an arc-shaped plate 310 is fixedly connected to the front and rear sides of the inner side of the connecting frame 301, and the arc-shaped plate 310 is adapted to the shape of the arc-shaped groove 305. A path groove is opened at the top of the arc-shaped plate 310, which runs through the upper and lower sides of the arc-shaped plate 310. A guide rod 311 is fixedly connected to the bottom of the slider 308, and the guide rod 311 is slidably connected to the corresponding side path groove.

[0036] Preferably, the path slots are arranged in an "S" shape.

[0037] Specifically, the top of the front and rear sides of the connecting frame 301 are fixedly connected to connecting boxes 319 respectively. The connecting boxes 319 are hollow inside and open at the bottom. The left and right sides of the connecting box 319 are rotatably connected to a rotatable threaded rod 302. The outer side of the threaded rod 302 is threadedly connected to a hollow block 303. The hollow block 303 is hollow inside and open at the bottom, and a sliding rod 304 is slidably connected inside it. The bottom of the sliding rod 304 is hinged to the corresponding sliding block 306.

[0038] When the workpiece is being cut, when the EDM wire is located on the left side of the workpiece, the sliding block 306 is located on the far left of the arc groove 305, making the sliding block 306 tilted in a "\" shape. This causes the air inlet pipe 208 and the suction head 209 to be tilted in the same way, located at the upper left corner of the cutting machine tool and covering the top of the cutting machine tool in an inclined manner. When the EDM wire is cutting, the smoke generated will diffuse obliquely upward. The left-tilted pipe opening can form a directional airflow to "envelop" the smoke and dust, reducing the diffusion to the inner wall of the left protective cover of the machine tool and reducing the difficulty of subsequent cleaning.

[0039] When the EDM wire cuts to the middle of the workpiece, the moving plate 202 moves to the right, causing the angle adjustment mechanism 30 and the suction head 209 to move to the right, and the threaded rod 302 rotates, thereby causing the hollow block 303 to move to the right. Through the sliding rod 304, the sliding block 306 slides along the inside of the arc groove 305. As the height of the sliding block 306 changes during the movement, the sliding rod 304 slides along the inside of the hollow block 303 to adapt to the position of the sliding block 306. During the movement of the sliding block 306 in the arc groove 305, the tilt angle of the sliding block 306 gradually decreases until the sliding block 306 is located at the center line of the arc groove 305. When the sliding block 306 becomes vertical, the air inlet pipe 208 and the suction head 209 are flipped to the same vertically downward position. At this time, the moving plate 202 moves the suction head 209 to the center of the cutting machine body 12. The vertically downward air inlet pipe 208 and the suction head 209 completely cover the top of the cutting machine body 12, forming a "columnar suction area" from the top. This effectively covers the smoke generated in the middle cutting area, whether the smoke is rising from the discharge point or spreading to the surroundings. It is especially beneficial for collecting smoke near the upper and lower surfaces of thick workpieces, preventing the smoke from accumulating above and below the workpiece and escaping to the sides.

[0040] When the EDM wire cuts to the right side of the workpiece, the moving plate 202 continues to drive the angle adjustment mechanism 30 and the suction head 209 to move to the right. At the same time, the threaded rod 302 rotates, causing the hollow block 303 to continue to move to the right. Through the linkage of the sliding rod 304, the sliding block 306 continues to slide to the right along the inside of the arc groove 305. When the sliding block 306 slides, the angle tilts to the right in a " / " shape, making the overall tilt angle of the sliding block 306 larger. This causes the air inlet pipe 208 and the suction head 209 to flip into the same shape, so that the suction head 209 is located on the top right side of the cutting machine body 12 and tilts to the left. This shape can specifically target and suck up the smoke generated in the right cutting area, just like "customizing" a suction channel for the right smoke, greatly reducing the diffusion of smoke to the right side of the machine and other areas, and improving the collection efficiency of the right smoke.

[0041] Traditional smoke intake pipes mostly adopt a single shape, with vertical ones being the most common. When the vertical inclined pipe moves to the left or right side boundary of the cutting machine, part of the intake pipe 208 is still located in the left side gap of the cutting machine body 12, thus reducing the effective intake range. When a single inclined intake pipe faces another inclined direction, such as when the "\" shaped intake pipe 208 is intakeing air on the top right side of the cutting machine body 12, part of its intake area acts on the outside of the cutting machine body 12, which also affects the effective intake volume. The angle adjustment mechanism 30 adjusts the angle of the suction head 209 according to the horizontal position of the suction head 209. When the suction head 209 is on the left, it is shaped like a "\". When the suction head 209 is in the middle of the cutting machine body 12, it is shaped like a "|". When the suction head 209 is on the top right side of the cutting machine body 12, it is shaped like a " / ". The first change in the position of the suction head 209 corresponds to the cutting position. That is, the suction head 209 adjusts its tilt to cover the smoke diffusion area when it is close to the cutting position (smoke generation position).

[0042] However, smoke diffuses outwards after it is generated, making it difficult to completely absorb. For example, when the suction head 209 is located on the left, a small portion of the smoke will rise from the right. During the workpiece cutting process, the position of the EDM wire moves continuously, and the position of the suction head 209 moves accordingly. Furthermore, during this movement, the suction head 209 constantly tilts. For instance, when the EDM wire is cutting to the left, the smoke, influenced by the movement of the electrode wire and the spraying of the working fluid, will diffuse to the left side and diagonally upwards of the machine tool. At this time, the suction head 209 tilts to the left as it moves to the left, and the airflow direction at the air inlet actively matches the diffusion trajectory of the smoke, creating a "wrap-around" suction effect. This tilting allows the airflow to efficiently draw the smoke into the air inlet pipe 208, greatly reducing the escape of smoke into areas such as the inner wall of the left side protective cover of the machine tool, thus improving the smoke capture rate. This achieves a dynamic capture effect.

[0043] Furthermore, as the sliding block 306 slides along the arc-shaped groove 305, it drives the slider 308, docking block 309, air inlet pipe 208, and suction head 209 to move synchronously via the guide rail 307. During the movement, the guide rod 311 slides along the path groove, thereby driving the sliders 308 on both sides to slide along the guide rail 307 while moving. This, in turn, drives the air inlet pipe 208 and suction head 209 to move horizontally back and forth while moving and tilting via the docking block 309. The movement of the suction head 209 is equivalent to scanning in a "circular" manner around the cutting area, forming a dynamic "airflow barrier." For example, when the workpiece is being cut on the left side of the machine tool, the suction head 209 not only tilts to the left to align with the smoke source but also forms an "airflow wall" in the left area through a small S-shaped oscillation, intercepting the smoke that attempts to diffuse towards the middle or right side of the machine tool, further reducing the smoke escape rate.

[0044] Meanwhile, the position of the guide rod 311 in the path groove determines the position of the suction head 209, changing the original three states of the suction head 209 (left tilt, vertical, right tilt) to a combination of the front, middle, and rear states, forming nine commonly used position variations, further expanding the effective range of the suction head 209, and also adapting to the vertical movement of the EDM wire.

[0045] Preferably, a rotating rod 312 is rotatably connected to the left side of the connecting box 319. The rotating rod 312 is fixedly connected to the end of the corresponding threaded rod 302. Synchronous pulleys 313 are fixedly connected to the outer sides of the two rotating rods 312 respectively, and a transmission belt 320 is engaged with the outer sides of the two synchronous pulleys 313. Thus, when one rotating rod 312 rotates, the other rotating rod 312 can rotate synchronously through the transmission of the synchronous pulleys 313 and the transmission belt 320, thereby achieving the effect of synchronous rotation of the two threaded rods 302 on both sides.

[0046] Furthermore, a support plate 321 is fixedly connected to the left rear end of the connecting frame 301. A movable rod 316, which passes through the front and rear sides of the support plate 321, is rotatably connected to the support plate 321. An active bevel gear 315 is fixedly connected to the front of the movable rod 316. A driven bevel gear 314 is vertically meshed with the right side of the active bevel gear 315. The right side of the driven bevel gear 314 is fixedly connected to the left end of the rear movable rod 316. A gear 317 is fixedly connected to the rear side of the movable rod 316. A toothed plate 318 meshes with the top of the gear 317. The top of the toothed plate 318 is fixedly connected to the surface of the protective box 10.

[0047] When the moving plate 202 moves, it drives the gear 317 to roll along the surface of the toothed plate 318, thereby driving the active bevel gear 315 to rotate in the same direction via the movable rod 316. This, in turn, drives the left rotating rod 312 to rotate via the transmission between the active bevel gear 315 and the driven bevel gear 314. Through the synchronous pulley 313 and the transmission belt 320, it drives the two threaded rods 302 to rotate, thereby moving the two hollow blocks 303 in the same direction as the moving plate 202. When the moving plate 202 moves to the right, it drives the suction head 209 to move in the same direction. Driven by the hollow blocks 303, the suction head 209 moves to the right and tilts inside the connecting frame 301, thus achieving a multiplier effect and further expanding the horizontal range of the suction head 209.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A dust protection device for an electrical discharge wire cutting machine tool, comprising a protective box, wherein sealed doors are provided on the front and rear sides of the protective box, and the cutting machine tool body is provided inside the protective box, characterized in that; The top of the protection box is provided with a smoke and dust filtering mechanism, the smoke and dust filtering mechanism comprises a sliding groove formed in the top of the protection box, the upper and lower sides of the sliding groove are through, and a movable plate that can move horizontally is slidably connected in the sliding groove, a sliding sealing piece is arranged at the boundary of the movable plate, a connecting pipe in a negative pressure state is fixedly connected to the top of the movable plate, a hose that is in communication with the connecting pipe is fixedly connected to the bottom of the movable plate, a flange is fixedly connected to the bottom of the hose, an air inlet pipe is fixedly connected to the bottom of the air inlet pipe, a suction head is fixedly connected to the bottom of the air inlet pipe, and a smoke sensor is installed at the boundary of the suction head. The bottom of the movable plate is provided with an angle adjusting mechanism, the angle adjusting mechanism comprises a connecting frame fixedly connected to the bottom of the movable plate, a groove is formed in the connecting frame at the connection position of the connecting frame and the hose, arc-shaped grooves are formed in the front and rear sides of the inner part of the connecting frame, two slidable sliding blocks are slidably connected in the arc-shaped grooves, guide rails are fixedly connected to the inner sides of the two sliding blocks, a sliding block is slidably connected to the inner side of the guide rail, the inner side of the sliding block is fixedly connected to a butt joint block, and the inner sides of the two butt joint blocks are fixedly connected to the outer sides of the air inlet pipe. The inner sides of the two arc-shaped plates are fixedly connected to the front and rear sides of the inner part of the connecting frame, the shapes of the arc-shaped plates are matched with the shapes of the arc-shaped grooves, and a path groove that penetrates through the upper and lower sides of the arc-shaped plate is formed in the top of the arc-shaped plate. The bottom of the sliding block is fixedly connected with a guide rod, and the guide rod is slidably connected with the corresponding side path groove.

2. The EDM wire cutting machine smoke protection device according to claim 1, characterized in that, The top of the connecting frame is fixedly connected with a connecting box, the inner part of the connecting box is hollow, and the bottom of the connecting box is open, two rotatable threaded rods two are rotatably connected to the left and right sides of the inner part of the connecting box, a hollow block is threadedly connected to the outer side of the threaded rod two, the inner part of the hollow block is hollow, the bottom of the hollow block is open, and a sliding rod is slidably connected in the inner part of the hollow block, and the bottom of the sliding rod is hingedly connected to the corresponding sliding block.

3. The WEDM smoke protection device according to claim 2, characterized in that, The top of the connecting frame is fixedly connected with a connecting box, the inner part of the connecting box is hollow, and the bottom of the connecting box is open, two rotatable threaded rods two are rotatably connected to the left and right sides of the inner part of the connecting box, a hollow block is threadedly connected to the outer side of the threaded rod two, the inner part of the hollow block is hollow, the bottom of the hollow block is open, and a sliding rod is slidably connected in the inner part of the hollow block, and the bottom of the sliding rod is hingedly connected to the corresponding sliding block.

4. The WEDM smoke protection device according to claim 3, characterized in that, The side surface of the connecting block is matched with the size of the inner part of the fixed box.

5. The WEDM smoke protection device according to claim 4, characterized in that, The top of the protection box is fixedly connected with a filter box, the inner part of the filter box is mounted with a detachable filter element, the air inlet of the filter box is fixedly connected with a folding pipe, the other end of the folding pipe is in communication with the connecting pipe, the top of the protection box is fixedly connected with a fan, the air inlet end of the fan is fixedly connected with an air pipe, the other end of the air pipe is fixedly connected with the air outlet of the filter box, the air outlet end of the fan is fixedly connected with an exhaust pipe, and the exhaust pipe is fixedly connected with the back side of the protection box.

6. The WEDM smoke protection device according to claim 5, characterized in that, The path groove is arranged in an "S" shape. The left side of the connecting box is rotatably connected with a rotating rod, the rotating rod is fixedly connected with the end of the corresponding threaded rod two, the outer sides of the two rotating rods are respectively fixedly connected with synchronous pulleys, and the outer sides of the two synchronous pulleys are jointly meshed with a transmission belt.

7. The WEDM smoke protection device according to claim 6, characterized in that, The left side rear end of the connecting frame is fixedly connected with a support plate, the support plate is rotationally connected with a movable rod penetrating through the front and rear sides of the support plate, the front of the movable rod is fixedly connected with a driving bevel gear, the right side of the driving bevel gear is vertically engaged with a driven bevel gear, and the right side of the driven bevel gear is fixedly connected with the left side end of the rear movable rod. The rear side of the movable rod is fixedly connected with a gear, the top of the gear is engaged with a toothed plate, and the top of the toothed plate is fixedly connected with the surface of the protection box.

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