Wire pressing device for wire cutting machine tool

Abstract

The present application relates to wire cutting machine tool technical field, specifically, it relates to a kind of wire cutting machine tool is used to press line device, it includes fixed column, the inside of the fixed column is connected with rotating column rotation, the both ends of the fixed column are rotationally connected with rotating shell, the both ends of the rotating column are fixedly connected with rotating shell inner wall, the inside of the rotating shell is provided with for controlling electrode wire tightness tightness component, one side of the tightness component is provided with emergency device;The present application is driven by emergency device, and tightness component slides to one side and both sides of sliding plate shrink to inside, wire guide wheel is fixed using clamp plate, so that electrode wire is in slightly straightened state, which realizes the stable fixation positioning of electrode wire, and a certain degree of stretching realizes the stability of electrode wire, and rotating column drives rotating shell emergency rotation, to reduce the possibility of foreign matter entering machine tool combustion damage, prevent excessive damage to cutting object by switching between electrode wire relaxation and tightness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire-cut electrical discharge machines, in particular to a wire pressing device for a wire-cut electrical discharge machine. BACKGROUND

[0002] A wire-cut electrical discharge machine is a numerical control device for precision machining based on the principle of electrical discharge. Its core is to generate pulse spark discharge between the electrode wire and the workpiece, with instantaneous high temperature reaching more than 7000℃, so that the metal material is melted, vaporized and etched away to realize cutting and forming. During machining, the electrode wire and the workpiece maintain a small gap, and the numerical control system accurately controls the movement trajectory to complete the machining of complex profiles.

[0003] The patent application with publication number CN223098173U discloses a wire pressing device for a wire-cut electrical discharge machine, which comprises a support frame, an installation plate fixed to the side surface of the support frame, a support plate fixed to the top end of the installation 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 the wire passing hole and are protected by a protective sleeve to reduce friction and wear. The cutting wire is limited and stabilized by the installation cylinder, is vertically arranged, and is convenient for cutting use. The cutting wire is wound on the surface of the winding pulley, and the winding pulley is rotated by the rotating handle to adjust the length and tightness of the cutting wire between the two installation plates. The top pressing plate is fixed by the jacking bolt to keep the winding pulley stable, so that the cutting wire can be wound in order and the tightness of the cutting wire can be adjusted.

[0004] Although the above-mentioned patent adjusts the length and tightness of the cutting wire by rotating the winding pulley with the rotating handle to realize the winding and tightness adjustment of the cutting wire, considering that foreign matter may enter the electrode wire of the machine during the work of the wire-cut electrical discharge machine, the machine may stop for maintenance, and if the fire burning the machine is not found in time, the critical situation may occur to prevent the occurrence of critical situation, and the machine needs to have the ability to handle the emergency to deal with the sudden situation.

[0005] In view of this, a wire pressing device for a wire-cut electrical discharge machine is proposed. SUMMARY

[0006] The purpose of the present application is to provide a wire pressing device for a wire-cut electrical discharge machine to solve the problems in the background art.

[0007] In order to achieve the above object, the application provides a wire pressing device for a wire cutting machine tool, which comprises a fixed column and an electrode wire, the inner side of the fixed column is rotatably connected with a rotating column, the outer wall of the two ends of the rotating column is fixedly connected with a first gear, the two sides of the first gear are meshingly connected with a first rack, the two ends of the fixed column are rotatably connected with a rotating shell, the two ends of the rotating column are fixedly connected with the inner wall of the rotating shell, the two sides of the end of the rotating shell away from the fixed column are fixedly connected with a first motor, the top of the rotating shell is fixedly connected with a wire binding box, the inner side of the wire binding box is movably connected with a wire binding wheel, the lower position of the wire binding box is provided with a tightness assembly for controlling the tightness of the electrode wire, and the side of the tightness assembly is provided with an emergency device.

[0008] As a preferred embodiment of the application, the bottom of the rotating shell is provided with an arcuate hole, the inner wall of the bottom of the rotating shell is slidably connected with a wire guide plate, the bottom of the wire guide plate is fixedly connected with a wire guide column, the wire guide column and the wire guide plate are electrically and slidably connected in the arcuate hole, the inner wall of the two sides of the rotating shell is fixedly connected with a limiting block, the side of the limiting block of the rotating shell is fixedly connected with a limiting plate, the top of the limiting plate is provided with a first sliding groove, and the first rack is slidably connected on the side of the limiting block.

[0009] As a preferred embodiment of the application, the inner wall of the bottom of the rotating shell is fixedly connected with an electric sliding rail, the electric sliding rail is located at the two sides of the arcuate hole, the top of the electric sliding rail is slidably connected with a semicircular ring, the two end positions of the semicircular ring are provided with inclined surfaces, the inclined surface of one end of the semicircular ring faces upward, and the inclined surface of the other end faces downward.

[0010] As a preferred embodiment of the application, the emergency device comprises a plurality of fixing frames, the two sides of the top of the limiting plate are fixedly connected with the fixing frames, the top of the fixing frame is provided with a second sliding groove, the end position of the second sliding groove of the fixing frame is fixedly connected with a blocking column, the side of the blocking column is fixedly connected with a horizontal column, the outer wall of the horizontal column is sleeved with a first spring, and the inner side of the side of the fixing frame is fixedly connected with a second rack.

[0011] As a preferred embodiment of the application, the second sliding groove is slidably connected with a sliding column, the horizontal column penetrates the sliding column, one end of the sliding column is fixedly connected with a belt, the inner sides of the two sides of the sliding column are fixedly connected with a cross connecting plate, the bottom inner side position of the cross connecting plate is fixedly connected with a second motor, the output end of the second motor is fixedly connected with a second gear, and the second gear is meshingly connected with the second rack on one side.

[0012] As a preferred embodiment of the application, the top of the second gear is fixedly connected with a connecting column, the connecting column is rotatably connected at the center position of the cross connecting plate, the top of the connecting column is fixedly connected with a third gear, and the third gear is meshingly connected with the first rack on the two sides.

[0013] As the application is preferred, the tension assembly comprises a rotating rod fixedly connected to the output end of the first motor, the outer wall of the rotating rod is fixedly connected to a limiting strip, and the end of the rotating rod away from the first motor is fixedly connected to a reciprocating threaded rod.

[0014] As the application is preferred, the outer wall of the rotating rod at the position of the limiting strip is slidingly connected to a sleeve rod, the end of the sleeve rod close to the first motor is fixedly connected to an extension plate, the middle end of the outer wall of the sleeve rod is rotatably connected to a rotating disc, the side of the rotating disc away from the extension plate is fixedly connected to a limiting column, the sleeve rod penetrates through the limiting column, the outer wall of the end of the sleeve rod away from the first motor is sleeved with a second spring, and the second spring is located between the limiting column and the end of the sleeve rod.

[0015] As the application is preferred, the end of the rotating disc close to the first motor is fixedly connected to a protruding column at the peripheral position, the protruding column is in the same vertical plane as the extension plate, the rotating disc is located on the inner side of a semicircular ring and in the same vertical plane as the semicircular ring, and the rotating disc and the semicircular ring are in the same center.

[0016] As the application is preferred, the outer wall of the reciprocating threaded rod is threadedly connected to a sliding plate, the sliding plates are fixedly connected to an extension rod between them, the inner side of each of the sliding plates is fixedly connected to a clamping plate, and the inner side of the clamping plate is rotatably connected to a wire guide wheel.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] 1. In the wire pressing device for the wire cutting machine tool, the tension assembly slides to one side, the sliding plates on both sides shrink inward, the clamping plates fix the wire guide wheels, and the electrode wire is in a slightly straightened state, so that the electrode wire is fixed and positioned, and the electrode wire is stably stretched to a certain extent.

[0019] 2. In the wire pressing device for the wire cutting machine tool, the second rack in the emergency device drives the second gear, so that the second gear rotates together with the third gear, the third gear drives the first rack, the first rack drives the first gear and the rotating column, and the rotating column drives the rotating shell to rotate in an emergency, so as to reduce the possibility of damage caused by the entry of sundries into the machine tool.

[0020] 3. In the wire pressing device for the wire cutting machine tool, the rotating shell rotates to one side while driving the electrode wire to displace, and the sliding plates and the clamping plates relax the wire guide wheels and the electrode wire, so that the electrode wire does not cause excessive damage to the cutting object when it displaces. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole three-dimensional schematic view of the application.

[0022] Figure 2 Fig. 1 is a schematic view of the overall section of the present application;

[0023] Figure 3 Fig. 2 is a schematic view of the half-section internal perspective of the rotating shell of the present application;

[0024] Figure 4 Fig. 3 is a schematic view of the internal perspective of the rotating shell of the present application;

[0025] Figure 5 Fig. 4 is a schematic view of the enlarged A part of the present application; Figure 4 Fig. 5 is a schematic view of the enlarged B part of the present application;

[0026] Figure 6 Fig. 6 is a schematic view of the perspective expansion of the emergency device of the present application;

[0027] Figure 7 Fig. 7 is a schematic view of the partial expansion perspective of the emergency device of the present application;

[0028] Figure 8 Fig. 8 is a schematic view of the partial expansion detail perspective of the tensioning assembly of the present application;

[0029] Fig. 9 is a schematic view of the meaning of each number in the drawing;

[0030] 1, fixed column; 11, rotating column; 12, No. 1 gear; 13, No. 1 rack; 2, rotating shell; 21, No. 1 motor; 22, wire binding box; 221, wire binding wheel; 23, arched hole; 24, limiting block; 25, limiting plate; 251, No. 1 sliding groove; 26, electric sliding rail; 261, semi-circular ring; 262, inclined surface; 27, wire guide plate; 271, wire guide column; 3, emergency device; 31, fixed frame; 311, No. 2 sliding groove; 312, blocking column; 313, cross column; 314, No. 1 spring; 315, No. 2 rack; 32, sliding column; 321, belt; 33, cross connecting plate; 331, No. 2 motor; 332, No. 2 gear; 333, connecting column; 334, No. 3 gear; 4, tensioning assembly; 41, rotating rod; 411, limiting strip; 412, reciprocating threaded rod; 42, sleeve rod; 421, extension plate; 422, limiting column; 423, No. 2 spring; 43, rotating disc; 431, protruding column; 44, sliding plate; 441, telescopic rod; 442, clamping plate; 45, wire guide wheel; 5, electrode wire. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] Embodiment one

[0034] Please refer to Figures 1-2 As shown in the drawings, the present embodiment provides a wire cutting machine with a wire pressing device, which comprises a fixed column 1 and an electrode wire 5, the inner side of the fixed column 1 is rotatably connected with a rotating column 11, the outer wall of both ends of the rotating column 11 is fixedly connected with a first gear 12, the two sides of the first gear 12 are meshingly connected with a first rack 13, both ends of the fixed column 1 are rotatably connected with a rotating shell 2, both ends of the rotating column 11 are fixedly connected with the inner wall of the rotating shell 2, both sides of the end of the rotating shell 2 away from the fixed column 1 is fixedly connected with a first motor 21, the top of the rotating shell 2 is fixedly connected with a wire binding box 22, the inner side of the wire binding box 22 is movably connected with a wire binding wheel 221, the position below the wire binding box 22 is provided with a tension assembly 4 for controlling the tightness of the electrode wire, one side of the tension assembly 4 is provided with an emergency device 3.

[0035] As Figures 2-4 shown, the bottom of the rotating shell 2 is provided with an arcuate hole 23, the inner wall of the bottom of the rotating shell 2 is slidably connected with a wire guide plate 27, the bottom of the wire guide plate 27 is fixedly connected with a wire guide column 271, the wire guide column 271 and the wire guide plate 27 are electrically and slidably connected in the arcuate hole 23, the inner wall of both sides of the rotating shell 2 is fixedly connected with a limiting block 24, the limiting block 24 of the rotating shell 2 is fixedly connected with a limiting plate 25 on one side, the top of the limiting plate 25 is provided with a first sliding groove 251, the first rack 13 is slidably connected on one side of the limiting block 24, the inner wall of the bottom of the rotating shell 2 is fixedly connected with an electric sliding rail 26, the electric sliding rail 26 is located at both sides of the arcuate hole 23, the top of the electric sliding rail 26 is slidably connected with a semicircular ring 261, both ends of the semicircular ring 261 are provided with inclined surfaces 262, one end of the semicircular ring 261 is inclined upward, and the other end is inclined downward.

[0036] As Figures 5-7As shown, the emergency device 3 includes a plurality of fixed frame 31, a plurality of fixed frame 31 is fixedly connected at the top of the limiting plate 25 both sides, the top of the fixed frame 31 is provided with a second sliding groove 311, the fixed frame 31 is fixedly connected with the stop post 312 at the end of the second sliding groove 311, the side of the stop post 312 is fixedly connected with the horizontal column 313, the outer wall of the horizontal column 313 is sleeved with a first spring 314, the inner side of one side of the fixed frame 31 is fixedly connected with a second rack 315, the second sliding groove 311 is slidably connected with a sliding column 32, the horizontal column 313 penetrates the sliding column 32, one end of the sliding column 32 is fixedly connected with a belt 321, the inner side of the sliding column 32 on both sides is fixedly connected with a cross connecting plate 33, the bottom inner side of the cross connecting plate 33 is fixedly connected with a second motor 331, the output end of the second motor 331 is fixedly connected with a second gear 332, the second gear 332 is engagedly connected with the second rack 315 on one side, the top of the second gear 332 is fixedly connected with a connecting column 333, the connecting column 333 penetrates the center of the cross connecting plate 33 and is rotatably connected, the top of the connecting column 333 is fixedly connected with a third gear 334, the third gear 334 is engagedly connected with the first rack 13 on both sides.

[0037] As shown, Figure 8 The elastic assembly 4 includes a rotating rod 41, the rotating rod 41 is fixedly connected to the output end of the first motor 21, the outer wall of the rotating rod 41 is fixedly connected with a limiting strip 411, the end of the rotating rod 41 away from the first motor 21 is fixedly connected with a reciprocating threaded rod 412, the outer wall of the rotating rod 41 at the position of the limiting strip 411 is slidably connected with a sleeve rod 42, the end of the sleeve rod 42 close to the first motor 21 is fixedly connected with an extension plate 421, the outer wall of the middle end of the sleeve rod 42 is rotatably connected with a rotating disc 43, the rotating disc 43 is fixedly connected with a limiting column 422 on the side away from the extension plate 421, the sleeve rod 42 penetrates the limiting column 422, the outer wall of the end of the sleeve rod 42 away from the first motor 21 is sleeved with a second spring 423, the second spring 423 is located between the limiting column 422 and the end of the sleeve rod 42, the end of the rotating disc 43 close to the first motor 21 is fixedly connected with a protruding column 431 at the peripheral position, the protruding column 431 is in the same vertical plane with the extension plate 421, the rotating disc 43 is located on the inner side of the semi-circular ring 261 and they are in the same vertical plane, the rotating disc 43 and the semi-circular ring 261 are in the same center, the outer wall of the reciprocating threaded rod 412 on both sides is threadedly connected with a sliding plate 44, the sliding plate 44 on both sides is fixedly connected with an extension rod 441, the inner side of the sliding plate 44 on both sides is fixedly connected with a clamping plate 442, the inner side of the clamping plate 442 is rotatably connected with a wire wheel 45.

[0038] Therefore, in the wire cutting machine tool, the electrode wire 5 needs to be fixed and tightened, as shown, Figures 2-4As shown, in the preparation stage, the staff will be fixed column 1 fixed on the machine after the top line box 22 through the line wheel 221 from the electrode wire 5 export to the guide wire wheel 45 position, and then through the guide wire wheel 45 from the guide wire plate 27 to the guide wire column 271 electrode wire 5 withdrawal after fixed on both ends of the guide wire wheel 45, in the initial state, the first motor 21 drive rotating rod 41 with sleeve rod 42 together with rotating rod 42 will drive the extension plate 421 together with rotating, then when the extension plate 421 rotating to the convex column 431 position on the upper end position of the rotating disc 43, will make the extension plate 421 drive convex column 431 and rotating disc 43 together with rotating;

[0039] As Figure 6 shown, when the extension plate 421 drive convex column 431 rotating to the right side of the slope 262 above the position stop rotating, then in the process of rotating disc 43 rotating will together pull the belt 321 in the outer wall of the rotating disc 43 curling, at this time the electric slide rail 26 response to the belt 321 curling, electric slide rail 26 drive half ring 261 and its inside loose component 4 with the belt 321 curling to the left side sliding with the same distance of belt 321 curling, make the belt 321 still in the straight state, then in the whole loose component 4 to the left side sliding, both sides of the rotating rod 41 driven both sides of the reciprocating screw rod 412 in rotating a certain angle will together drive the sliding plate 44 to the both sides of the guide wire wheel 45 tightening, in the whole loose component 4 to the left side sliding process, can straighten the electrode wire 5 in the slightly relaxed state, at the same time, the two sides of the sliding plate 44 is in the inside contraction, using the clamp plate 442 to fix the guide wire wheel 45, make the electrode wire 5 in the slightly straight state, which realizes the fixed positioning of the electrode wire 5, and with a certain degree of stretching to realize the stability of the electrode wire 5.

[0040] In the absence of the machine tool work, the staff need to take emergency measures after the garbage into the machine, and in the process of working staff quickly power off, the electrode wire 5 may have some current not clean discharge, still may ignite the garbage loss, such as Figures 6-8As shown, when the sundry enters the vicinity of the cutting object, the machine inside the monitor recognizes the threat, and the first motor 21 rotates. At this time, the extension plate 421 above the right end inclined surface 262 of the semi-circular ring 261 continues to rotate and contact the inclined surface 262, and slides outward a small distance under the limitation of the inclined surface 262. In the process of the extension plate 421 sliding outward a small distance, the extension plate 421 will gradually separate from the protruding column 431, so that the rotating disc 43 and the protruding column 431 are no longer limited by the extension plate 421. At the same time, under the pushing force of the first spring 314 and the reaction force of the belt 321, the sliding column 32 slides to the left, and the cross connecting plate 33 slides together. In the process of the cross connecting plate 33 sliding, the second gear 332 rotates under the limitation of the second rack 315, and the connecting column 333 and the third gear 334 rotate together. In the process of the third gear 334 rotating, the two first racks 13 on both sides slide in opposite directions, and the first gear 12 and the rotating column 11 rotate. In the process of the rotating column 11 rotating, the entire rotating shell 2 quickly rotates to one side, so that the entire rotating shell 2 produces an effect of avoiding sundry to one side, thereby reducing the possibility of sundry entering the machine and burning damage.

[0041] It should be noted that when the first motor 21 continues to rotate by a certain angle, the reciprocating threaded rod 412 rotates together, and at this time the two sliding plates 44 on both sides driven by the reciprocating threaded rod 412 slide outward and expand, gradually moving away from the wire guide wheel 45, and loosening the wire guide wheel 45 so that the electrode wire 5 returns to a relaxed state. This makes the electrode wire 5 that rotates together with the rotating shell 2 also quickly become relaxed even if the entire device rotates to one side with the rotating shell 2, and will not cause excessive damage to the cutting object.

[0042] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application 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). 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). The rotating rod (41) is slidably connected to the outer wall of the limiting bar (411) with a sleeve rod (42). The sleeve rod (42) is fixedly connected to an extension plate (421) at one end near the first motor (21). The middle outer wall of the sleeve rod (42) is rotatably connected to a turntable (43). The turntable (43) is fixedly connected to a limiting post (422) on the side 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 sleeve rod (42) at one end 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). 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 the two are on the same vertical plane. The turntable (43) and the semi-circular ring (261) are at the same center. 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).

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. The wire pressing device for a wire EDM machine tool 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.

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