Wire pressing device for linear cutting machine tool

Abstract

The invention relates to the technical field of electric spark wire cutting machine tools, in particular to a wire pressing device for a wire cutting machine tool, which comprises a fixed column, the inner side of the fixed column is rotatably connected with a rotating column in a penetrating manner, the two ends of the fixed column are rotatably connected with rotating shells, and the two ends of the rotating column are fixedly connected with the inner walls of the rotating shells; the inner side of the rotating shell is provided with an elastic assembly used for controlling the tightness of the electrode wire, and one side of the elastic assembly is provided with an emergency device. Through transmission of the emergency device, the elastic assembly slides towards one side, the sliding plates on the two sides contract towards the inner side, the wire guide wheel is fixed through the clamping plates, the electrode wire is in a slightly tightened state, stable fixing and positioning of the electrode wire are achieved, the electrode wire is stabilized through stretching to a certain degree, and the service life of the electrode wire is prolonged. And the rotating column drives the rotating shell to rotate emergently, so that the possibility that sundries enter a machine tool to be burnt and damaged is reduced, and excessive damage to a cut object is prevented through switching between loosening and tightening of the electrode wire.

Description

Technical Field

[0001] This invention relates to the field of wire electrical discharge machining (EDM) machine technology, and more specifically, to a wire pressing device for a wire EDM machine. Background Technology

[0002] A wire EDM machine is a CNC machine tool that uses the principle of electrical discharge for precision machining. Its core is to generate pulsed spark discharge between the electrode wire and the workpiece, with instantaneous high temperatures reaching over 7000℃, causing the metal material to melt, vaporize, and be eroded, thus achieving cutting and shaping. During machining, the electrode wire and the workpiece maintain a tiny gap, and the CNC system precisely controls the movement trajectory to complete the machining of complex contours.

[0003] Patent application CN223098173U discloses a wire pressing device for a wire EDM machine, including a support frame, a mounting plate fixed to the side of the support frame, a support plate fixed to the top of the mounting plate, a winding pulley installed between the two support plates, and a cutting wire connected between the two winding pulleys. The two ends of the cutting wire pass through wire holes, are protected by protective sleeves to reduce friction and wear, and are stabilized by a mounting sleeve to keep the cutting wire vertical, facilitating cutting. The cutting wire is wound around the surface of the winding pulley, and the length and tension of the cutting wire between the two mounting plates are adjusted by rotating the handle to turn the winding pulley. A tightening bolt secures the tightening plate, maintaining the stability of the winding pulley, thus allowing for orderly winding of the cutting wire and adjustment of its tension. Although the aforementioned patent allows for adjusting the length and tension of the cutting wire by rotating the handle and turning the winding pulley, it is necessary to ensure that the machine tool has emergency handling capabilities to deal with unexpected situations. This is because if foreign objects enter the electrode wire during the operation of the wire cutting machine, the machine will have to stop for maintenance. If the problem is not detected in time, it may cause a fire that could destroy the machine tool.

[0004] In view of this, we propose a wire pressing device for wire EDM machines. Summary of the Invention

[0005] The purpose of this invention is to provide a wire pressing device for a wire EDM machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a wire pressing device for a wire EDM machine, comprising a fixed column and an electrode wire. A rotating column is rotatably connected through the inner side of the fixed column. A gear is fixedly connected to the outer walls of both ends of the rotating column. A rack is meshed with both sides of the gear. A rotating housing is rotatably connected to both ends of the fixed column. The two ends of the rotating column are fixedly connected to the inner walls of the rotating housing. A motor is fixedly connected to both sides of the rotating housing at the end away from the fixed column. A wire harness box is fixedly connected to the top of the rotating housing. A wire harness wheel is movably connected to the inner side of the wire harness box. A tensioning component for controlling the tension of the electrode wire is provided below the wire harness box. An emergency device is provided on one side of the tensioning component.

[0007] As a preferred embodiment of the present invention, the bottom of the rotating shell is provided with an arched hole, a guide plate is slidably connected to the inner wall of the bottom of the rotating shell, a guide post is fixedly connected to the bottom of the guide plate, the guide post and the guide plate are electrically slidably connected in the arched hole, a limiting block is fixedly connected to the inner walls of both sides of the rotating shell, a limiting plate is fixedly connected to one side of the limiting block, a first sliding groove is provided on the top of the limiting plate, and a first rack is slidably connected to one side of the limiting block.

[0008] As a preferred embodiment of the present invention, an electric slide rail is fixedly connected to the bottom inner wall of the rotating shell. The electric slide rail is located on both sides of the arched hole. A semi-circular ring is slidably connected to the top of the electric slide rail. Both ends of the semi-circular ring are provided with inclined surfaces. One end of the semi-circular ring faces upward and the other end faces downward.

[0009] As a preferred embodiment of the present invention, the emergency device includes multiple fixing frames, which are fixedly connected to the top of both sides of the limiting plate. The top of each fixing frame has a second sliding groove, and a stop post is fixedly connected to the end of the second sliding groove. A horizontal column is fixedly connected to one side of the stop post, and a first spring is sleeved on the outer wall of the horizontal column. A second rack is fixedly connected to the inner side of one side of the fixing frame.

[0010] As a preferred embodiment of the present invention, a sliding column is slidably connected in the second sliding groove, the horizontal column passes through the sliding column, a belt is fixedly connected to one end of the sliding column, a cross connecting plate is fixedly connected to the inner side of the sliding columns on both sides, a second motor is fixedly connected to the bottom inner side of the cross connecting plate, a second gear is fixedly connected to the output end of the second motor, and the second gear meshes with a second rack on one side.

[0011] As a preferred embodiment of the present invention, a connecting column is fixedly connected to the top of the second gear, the connecting column is rotatably connected through the center of the cross connecting plate, and a third gear is fixedly connected to the top of the connecting column, the third gear meshing with the first racks on both sides.

[0012] As a preferred embodiment of the present invention, the tensioning assembly includes a rotating rod, which is fixedly connected to the output end of a first motor. A limiting strip is fixedly connected to the outer wall of the rotating rod, and a reciprocating threaded rod is fixedly connected to the end of the rotating rod away from the first motor.

[0013] Preferably, the rotating rod is slidably connected to a sleeve rod on the outer wall of the limiting bar position. An extension plate is fixedly connected to the end of the sleeve rod near the first motor. A turntable is rotatably connected to the outer wall of the middle end of the sleeve rod. A limiting post is fixedly connected to the turntable on the side away from the extension plate. The sleeve rod passes through the limiting post. A second spring is sleeved on the outer wall of the end of the sleeve rod away from the first motor. The second spring is located between the limiting post and the end of the sleeve rod.

[0014] As a preferred embodiment of the present invention, the turntable has a protruding column fixedly connected to one end of the periphery near the No. 1 motor. The protruding column and the extension plate are on the same vertical plane. The turntable is located inside the semi-circular ring, and the two are on the same vertical plane. The turntable and the semi-circular ring are at the same center.

[0015] As a preferred embodiment of the present invention, the outer walls of the reciprocating threaded rods on both sides are threadedly connected to sliding plates, a telescopic rod is fixedly connected between the two sliding plates, a clamping plate is fixedly connected to the inner side of each sliding plate, and a guide wheel is rotatably connected to the inner side of the clamping plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the wire clamping device of this wire EDM machine, the guide wheel is fixed by the tensioning component sliding to one side and the sliding plates on both sides contracting inward, so that the electrode wire is in a slightly taut state. This achieves the fixed positioning of the electrode wire and the stability of the electrode wire by a certain degree of stretching.

[0017] 2. In the wire pressing device of this wire EDM machine, the transmission of the second rack to the second gear in the emergency device causes the second gear and the third gear to rotate together. At the same time, the third gear drives the first rack, and the first rack drives the first gear and the rotating column to rotate. This achieves the effect of the rotating column driving the rotating shell to rotate in an emergency, so as to reduce the possibility of foreign objects entering the machine tool and causing combustion damage.

[0018] 3. In the wire pressing device of this wire EDM machine, the electrode wire is moved along with the rotating shell as it rotates to one side. The sliding plate and clamping plate loosen the guide wheel and the electrode wire, so that the electrode wire will not cause excessive damage to the cutting workpiece when it moves. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the entire invention; Figure 2This is a schematic cross-sectional view of the entire invention; Figure 3 This is a three-dimensional schematic diagram of the interior of the rotating shell of the present invention (half-section). Figure 4 This is a three-dimensional schematic diagram of the interior of the rotating shell of the present invention; Figure 5 for Figure 4 Enlarged diagram of section A in the middle; Figure 6 This is a three-dimensional unfolded schematic diagram of the emergency device of the present invention; Figure 7 This is a three-dimensional schematic diagram of the emergency device portion of the present invention; Figure 8 This is a three-dimensional schematic diagram showing the unfolded details of the tensioning component of the present invention; The meanings of the labels in the diagram are as follows: 1. Fixed column; 11. Rotating column; 12. Gear No. 1; 13. Rack No. 1; 2. Rotating housing; 21. Motor No. 1; 22. Cable harness box; 221. Cable harness wheel; 23. Arched hole; 24. Limiting block; 25. Limiting plate; 251. Sliding groove No. 1; 26. Electric slide rail; 261. Semicircular ring; 262. Inclined surface; 27. Wire guide plate; 271. Wire guide post; 3. Emergency device; 31. Fixed frame; 311. Sliding groove No. 2; 312. Stop post; 313. Horizontal column; 314. Spring No. 1; 31 5. Rack No. 2; 32. Sliding column; 321. Belt; 33. Cross connecting plate; 331. Motor No. 2; 332. Gear No. 2; 333. Connecting column; 334. Gear No. 3; 4. Tensioning assembly; 41. Rotating rod; 411. Restricting bar; 412. Reciprocating threaded rod; 42. Sleeve rod; 421. Extension plate; 422. Restricting column; 423. Spring No. 2; 43. Turntable; 431. Protruding column; 44. Sliding plate; 441. Telescopic rod; 442. Clamping plate; 45. Guide wheel; 5. Electrode wire. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Example 1 Please see Figures 1-2 As shown, this embodiment provides a wire pressing device for a wire EDM machine, including a fixed column 1 and an electrode wire 5. A rotating column 11 is rotatably connected through the inner side of the fixed column 1. A gear 12 is fixedly connected to the outer walls of both ends of the rotating column 11. A rack 13 is meshed with both sides of the gear 12. A rotating shell 2 is rotatably connected to both ends of the fixed column 1. The two ends of the rotating column 11 are fixedly connected to the inner wall of the rotating shell 2. A motor 21 is fixedly connected to both sides of the rotating shell 2 at the end away from the fixed column 1. A wire harness box 22 is fixedly connected to the top of the rotating shell 2. A wire harness wheel 221 is movably connected to the inner side of the wire harness box 22. A tensioning component 4 for controlling the tension of the electrode wire is provided at the lower position of the wire harness box 22. An emergency device 3 is provided on one side of the tensioning component 4.

[0023] like Figures 2-4 As shown, the bottom of the rotating shell 2 has an arched hole 23. A guide plate 27 is slidably connected to the inner wall of the bottom of the rotating shell 2. A guide post 271 is fixedly connected to the bottom of the guide plate 27. The guide post 271 and the guide plate 27 are electrically slidably connected in the arched hole 23. Limiting blocks 24 are fixedly connected to the inner walls of both sides of the rotating shell 2. A limiting plate 25 is fixedly connected to one side of the limiting block 24. A first sliding groove 251 is opened on the top of the limiting plate 25. A first rack 13 is slidably connected to one side of the limiting block 24. An electric slide rail 26 is fixedly connected to the inner wall of the bottom of the rotating shell 2. The electric slide rail 26 is located on both sides of the arched hole 23. A semi-circular ring 261 is slidably connected to the top of the electric slide rail 26. An inclined surface 262 is opened at both ends of the semi-circular ring 261. One inclined surface 262 of the semi-circular ring 261 faces upward and the other inclined surface 262 faces downward.

[0024] like Figures 5-7As shown, the emergency device 3 includes multiple fixing brackets 31, which are fixedly connected to the top of both sides of the limiting plate 25. A second sliding groove 311 is provided on the top of each fixing bracket 31. A stop post 312 is fixedly connected to the end of the second sliding groove 311 of each fixing bracket 31. A horizontal post 313 is fixedly connected to one side of the stop post 312. A first spring 314 is fitted onto the outer wall of the horizontal post 313. A second rack 315 is fixedly connected to the inner side of one fixing bracket 31. A sliding post 32 is slidably connected within the second sliding groove 311. The horizontal post 313 passes through the sliding post 32, and one end of the sliding post 32 is fixed... A belt 321 is connected to the inner side of the sliding columns 32 on both sides, and a cross connecting plate 33 is fixedly connected to the inner side of the bottom of the cross connecting plate 33. A second motor 331 is fixedly connected to the output end of the second motor 331, and a second gear 332 is fixedly connected to the output end of the second motor 331. The second gear 332 meshes with a second rack 315 on one side. A connecting column 333 is fixedly connected to the top of the second gear 332. The connecting column 333 is rotatably connected through the center of the cross connecting plate 33. A third gear 334 is fixedly connected to the top of the connecting column 333. The third gear 334 meshes with a first rack 13 on both sides.

[0025] like Figure 8 As shown, the tensioning assembly 4 includes a rotating rod 41, which is fixedly connected to the output end of the first motor 21. A limiting strip 411 is fixedly connected to the outer wall of the rotating rod 41. A reciprocating threaded rod 412 is fixedly connected to the end of the rotating rod 41 away from the first motor 21. A sleeve rod 42 is slidably connected to the outer wall of the rotating rod 41 at the position of the limiting strip 411. An extension plate 421 is fixedly connected to the end of the sleeve rod 42 near the first motor 21. A turntable 43 is rotatably connected to the outer wall of the middle end of the sleeve rod 42. A limiting post 422 is fixedly connected to the turntable 43 on the side away from the extension plate 421. The sleeve rod 42 passes through the limiting post 422. The sleeve rod 42 is sleeved on the outer wall of the end away from the first motor 21. There is a second spring 423, which is located between the end of the limiting post 422 and the sleeve rod 42. A protruding post 431 is fixedly connected to the periphery of the turntable 43 near the end of the first motor 21. The protruding post 431 and the extension plate 421 are on the same vertical plane. The turntable 43 is located inside the semi-circular ring 261, and the two are on the same vertical plane. The turntable 43 and the semi-circular ring 261 are at the same center. The outer wall of the reciprocating threaded rod 412 on both sides is threaded with a sliding plate 44. A telescopic rod 441 is fixedly connected between the two sliding plates 44. A clamping plate 442 is fixedly connected to the inner side of the two sliding plates 44. A guide wheel 45 is rotatably connected to the inner side of the clamping plate 442.

[0026] Therefore, it can be seen that when it is necessary to tighten or loosen the electrode wire 5 in a wire cutting machine, such as... Figures 2-4As shown, during the preparation stage, after the staff fixes the fixing post 1 on the machine tool, the electrode wire 5 is led out from the top wire harness box 22 through the wire harness wheel 221 to the position of the guide wheel 45. Then, the electrode wire 5 is withdrawn from the guide plate 27 to the guide post 271 through the guide wheel 45 and fixed on the guide wheels 45 at both ends. In the initial state, the first motor 21 drives the rotating rod 41 and the sleeve rod 42 to rotate together. The sleeve rod 42 will drive the extension plate 421 to rotate together. When the extension plate 421 rotates to the position of the protruding post 431 at the upper end of the turntable 43, the extension plate 421 will drive the protruding post 431 and the turntable 43 to rotate together. like Figure 6 As shown, when the extension plate 421 drives the protruding column 431 to rotate to the position above the right inclined surface 262 and stops rotating, the turntable 43 will pull the belt 321 to curl on the outer wall of the turntable 43 during rotation. At this time, the electric slide rail 26 responds to the curling of the belt 321. The electric slide rail 26 drives the semi-circular ring 261 and its inner tensioning component 4 to slide to the left along with the curling of the belt 321, the same distance as the curling of the belt 321, so that the belt 321 remains taut. Then, the entire tensioning component 4 slides to the left. As the movement continues, the reciprocating threaded rods 412 on both sides, driven by the rotating rods 41 on both sides, will together drive the sliding plate 44 to tighten towards both sides of the guide wheel 45 after rotating at a certain angle. During the entire process of the tensioning assembly 4 sliding to the left, the electrode wire 5, which is in a slightly relaxed state, can be straightened, and the sliding plates 44 on both sides can be contracted inward. The guide wheel 45 is fixed by the clamping plate 442, so that the electrode wire 5 is in a slightly taut state. This achieves the fixed positioning of the electrode wire 5 and stabilizes the electrode wire 5 with a certain degree of tension.

[0027] When a machine tool is operating unattended, if foreign objects accidentally enter the machine, emergency measures are required. Even after the operator quickly cuts off the power, some current may remain on electrode wire 5, which could still ignite the foreign objects and cause damage. Figures 6-8As shown, when debris enters the vicinity of the cutting object, the machine tool's internal monitoring system identifies it as threatening, and motor 21 rotates. At this time, the extension plate 421, located above the inclined plane 262 on the right end of the semicircular ring 261, continues to rotate and contacts the inclined plane 262. Under the constraint of the inclined plane 262, it slides a short distance outward. During this outward sliding extension, the extension plate 421 gradually detaches from the protruding column 431, so that the turntable 43 and the protruding column 431 are no longer restricted by the extension plate 421. Simultaneously, under the thrust of spring 314 and the reaction force of belt 321, the sliding column 32 slides to the left, and together with it, the cross connecting plate 33 slides. During the sliding of the cross connecting plate 33, it will drive the second gear 332 to rotate under the restriction of the second rack 315, and rotate together with the connecting column 333 and the third gear 334. During the rotation of the third gear 334, it will drive the first rack 13 on both sides to slide in opposite directions. Similarly, during the sliding of the first rack 13 on both sides in opposite directions, it will also drive the first gear 12 and the rotating column 11 to rotate. During the rotation of the rotating column 11, it will drive the entire rotating shell 2 to rotate quickly to one side, so that the entire rotating shell 2 can avoid debris and reduce the possibility of debris entering the machine tool and causing combustion and damage.

[0028] It should be noted that when the No. 1 motor 21 continues to rotate at a certain angle, the reciprocating threaded rod 412 will rotate together. At this time, the sliding plates 44 on both sides driven by the rotation of the reciprocating threaded rod 412 will slide outward and gradually move away from the guide wheel 45, and loosen the guide wheel 45 so that the electrode wire 5 will become relaxed again. This means that even if the rotating shell 2 drives the entire device to rotate to one side, the electrode wire 5, which rotates and displaces with the rotating shell 2, will also quickly become relaxed, and will not cause excessive damage to the cutting object.

[0029] 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 preferred examples and are not intended to limit 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 present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wire pressing device for a wire EDM machine, comprising a fixed post (1) and an electrode wire (5), characterized in that: A rotating column (11) is rotatably connected through the inner side of the fixed column (1). A gear (12) is fixedly connected to the outer walls of both ends of the rotating column (11). A rack (13) is meshed with both sides of the gear (12). A rotating shell (2) is rotatably connected to both ends of the fixed column (1). The two ends of the rotating column (11) are fixedly connected to the inner wall of the rotating shell (2). A motor (21) is fixedly connected to both sides of the rotating shell (2) at the end away from the fixed column (1). A wire harness box (22) is fixedly connected to the top of the rotating shell (2). A wire harness wheel (221) is movably connected to the inner side of the wire harness box (22). A tensioning assembly (4) for controlling the tension of the electrode wire is provided below the wire harness box (22). An emergency device (3) is provided on one side of the tensioning assembly (4).

2. The wire pressing device for a wire EDM machine tool according to claim 1, characterized in that: The bottom of the rotating shell (2) is provided with an arched hole (23). A guide plate (27) is slidably connected to the inner wall of the bottom of the rotating shell (2). A guide post (271) is fixedly connected to the bottom of the guide plate (27). The guide post (271) and the guide plate (27) are electrically slidably connected in the arched hole (23). A limiting block (24) is fixedly connected to the inner walls of both sides of the rotating shell (2). A limiting plate (25) is fixedly connected to one side of the limiting block (24). A first sliding groove (251) is opened on the top of the limiting plate (25). A first rack (13) is slidably connected to one side of the limiting block (24).

3. The wire pressing device for a wire EDM machine tool according to claim 2, characterized in that: The bottom inner wall of the rotating shell (2) is fixedly connected to an electric slide rail (26). The electric slide rail (26) is located on both sides of the arched hole (23). The top of the electric slide rail (26) is slidably connected to a semi-circular ring (261). Both ends of the semi-circular ring (261) are provided with inclined surfaces (262). One end of the semi-circular ring (261) has an inclined surface (262) facing upward, and the other end has an inclined surface (262) facing downward.

4. The wire pressing device for a wire EDM machine tool according to claim 3, characterized in that: The emergency device (3) includes multiple fixing frames (31), which are fixedly connected to the top of both sides of the limiting plate (25). The top of the fixing frame (31) is provided with a second sliding groove (311). A stop post (312) is fixedly connected to the end of the second sliding groove (311) of the fixing frame (31). A horizontal column (313) is fixedly connected to one side of the stop post (312). A first spring (314) is sleeved on the outer wall of the horizontal column (313). A second rack (315) is fixedly connected to the inner side of one side of the fixing frame (31).

5. A wire pressing device for a wire EDM machine according to claim 4, characterized in that: A sliding column (32) is slidably connected in the second sliding groove (311). The horizontal column (313) passes through the sliding column (32). A belt (321) is fixedly connected to one end of the sliding column (32). A cross connecting plate (33) is fixedly connected to the inner side of the sliding column (32) on both sides. A second motor (331) is fixedly connected to the bottom inner side of the cross connecting plate (33). A second gear (332) is fixedly connected to the output end of the second motor (331). The second gear (332) meshes with a second rack (315) on one side.

6. The wire pressing device for a wire EDM machine tool according to claim 5, characterized in that: The top of the second gear (332) is fixedly connected to a connecting column (333), which is rotatably connected to the center of the cross connecting plate (33). The top of the connecting column (333) is fixedly connected to a third gear (334), which meshes with the first racks (13) on both sides.

7. A wire pressing device for a wire EDM machine according to claim 6, characterized in that: The tensioning assembly (4) includes a rotating rod (41), which is fixedly connected to the output end of the first motor (21). A limiting strip (411) is fixedly connected to the outer wall of the rotating rod (41), and a reciprocating threaded rod (412) is fixedly connected to the end of the rotating rod (41) away from the first motor (21).

8. A wire pressing device for a wire EDM machine according to claim 7, characterized in that: The rotating rod (41) is slidably connected to a sleeve rod (42) on the outer wall of the limiting strip (411). An extension plate (421) is fixedly connected to the end of the sleeve rod (42) near the first motor (21). A turntable (43) is rotatably connected to the outer wall of the middle end of the sleeve rod (42). A limiting post (422) is fixedly connected to the side of the turntable (43) away from the extension plate (421). The sleeve rod (42) passes through the limiting post (422). A second spring (423) is sleeved on the outer wall of the end of the sleeve rod (42) away from the first motor (21). The second spring (423) is located between the limiting post (422) and the end of the sleeve rod (42).

9. A wire pressing device for a wire EDM machine tool according to claim 8, characterized in that: The turntable (43) has a protruding column (431) fixedly connected to one end of the turntable (43) near the No. 1 motor (21). The protruding column (431) and the extension plate (421) are on the same vertical plane. The turntable (43) is located inside the semi-circular ring (261) and both are on the same vertical plane. The turntable (43) and the semi-circular ring (261) are at the same center.

10. A wire pressing device for a wire EDM machine tool according to claim 9, characterized in that: The outer walls of the reciprocating threaded rods (412) on both sides are threaded with sliding plates (44), and telescopic rods (441) are fixedly connected between the sliding plates (44) on both sides. Clamping plates (442) are fixedly connected to the inner sides of the sliding plates (44), and guide wheels (45) are rotatably connected to the inner sides of the clamping plates (442).

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