A wire guiding mechanism for a wire cutting machine tool

Abstract

The present invention discloses a wire guiding mechanism for a wire cutting machine tool, belonging to the technical field of wire guiding mechanisms, which includes a support frame, a longitudinal inclination adjustment mechanism, a lateral limiting mechanism and a lateral inclination adjustment mechanism. A wire feeding wheel and a wire take-up wheel are respectively installed inside the support frame from top to bottom, and upper and lower support plates parallel to each other are respectively connected to the upper and lower ends of the support frame. Main guiding rollers are provided at the ends of the upper and lower support plates connected to the support frame, and longitudinal inclination adjustment mechanisms are provided on both the upper and lower support plates. A support bar is connected to the longitudinal inclination adjustment mechanism, and a transition guiding frame is installed at one end of the upper surface of the support bar close to the main guiding roller. In this invention, the cutting part of the upper wire can be adjusted arbitrarily not only in the longitudinal direction but also in the lateral direction, so that it can be adaptively adjusted according to the cutting requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of wire guiding mechanisms, and particularly to a wire guiding mechanism for a wire cutting machine tool. Background Art

[0002] In the early field of machining, for the cutting of some complex shapes, especially high-precision contour cutting, traditional machining methods such as turning and milling are difficult to meet the requirements. With the development of electric discharge machining technology, wire cutting machine tools emerged. Electric discharge machining is based on the electro-erosion phenomenon generated by pulsed discharge between the electrode and the workpiece to remove materials. A wire cutting machine tool uses a continuously moving metal wire as the tool electrode, applies a pulsed voltage between the workpiece and the wire electrode. When the distance between the wire electrode and the workpiece reaches a certain level, spark discharge will occur, eroding the workpiece material.

[0003] As a key component of a wire cutting machine tool, the wire guiding mechanism plays the role of high-speed wire movement.

[0004] When the existing wire guiding mechanism for a wire cutting machine tool is in use, the following technical problems still exist, such as:

[0005] 1. When the existing wire guiding mechanism for a wire cutting machine tool is in use, the wire at the cutting part can only be adjusted in angle in the longitudinal direction. And when adjusting, only the upper and lower ends of the wire at the cutting part move the same distance in opposite longitudinal directions respectively. This makes it restricted when adjusting the angle in the longitudinal direction. For example, when it is necessary to horizontally move the upper and lower ends of the wire at the cutting part by different distances, the existing wire guiding mechanism for a wire cutting machine tool cannot arbitrarily adjust the angle in the longitudinal direction.

[0006] 2. When the existing wire guiding mechanism for a wire cutting machine tool is in use, the wire at the cutting part cannot be adjusted in the lateral direction. This makes it impossible to adjust the cutting part of the wire into a situation where it forms a certain included angle with the lateral direction and the longitudinal direction respectively, and thus it cannot meet some special cutting requirements.

[0007] Therefore, a wire guiding mechanism for a wire cutting machine tool is needed to solve the above problems. Summary of the Invention

[0008] The purpose of the present invention is to provide a wire guiding mechanism for a wire cutting machine tool to solve the problems in the above background art that the cutting part of the wire on the existing wire guiding mechanism for a wire cutting machine tool cannot be arbitrarily adjusted in the longitudinal direction and is not convenient to be adjusted in the lateral direction.

[0009] To achieve the above purpose, the present invention provides the following technical solutions:

[0010] A wire guiding mechanism for a wire cutting machine tool, comprising a support frame, a longitudinal inclination adjusting mechanism, a lateral limiting mechanism and a lateral inclination adjusting mechanism. Inside the support frame, a wire feeding wheel and a wire taking-up wheel are respectively installed from top to bottom. The upper and lower ends of the support frame are respectively connected with parallel upper support plates and lower support plates. At the ends where the upper support plates and the lower support plates are connected to the support frame, main guiding rollers are provided. Longitudinal inclination adjusting mechanisms are provided on both the upper support plates and the lower support plates. A support bar is connected to the longitudinal inclination adjusting mechanism. At one end of the upper surface of the support bar close to the main guiding roller, a transition guiding frame is installed. At the other end of the support bar, a lateral limiting mechanism is provided. An activity guiding frame is connected to the lateral limiting mechanism. On the upper surface of the middle part of the support bar, fixed guiding frames are evenly installed. A conductor is also installed on the upper surface of the middle part of the support bar. The lateral limiting mechanism is also connected to the lateral inclination adjusting mechanism.

[0011] Preferably, the longitudinal inclination adjusting mechanism comprises lateral support plates, hinges and connection blocks. The lateral support plates are provided on the front and rear sides of the support frame. A lateral adjusting lead screw is rotatably connected between the two lateral support plates. One end of the lateral adjusting lead screw rotatably penetrates through the corresponding lateral support plate. The lateral adjusting lead screw threadedly penetrates through two toggle frames. A secondary guiding roller is provided on each toggle frame. The upper end of the upper toggle frame and the lower end of the lower toggle frame are respectively movably penetrated by corresponding limiting shafts. The two limiting shafts are respectively fixedly connected to the lower surface of the upper support plate and the upper surface of the lower support plate. The upper end of the upper toggle frame and the lower end of the lower toggle frame are respectively axially connected to one end of the corresponding support bar through hinges. The support bar movably penetrates through the corresponding connection block. The connection block is rotatably connected to the surface of the corresponding movable frame. The movable frame is threadedly penetrated by the corresponding screw rod. The screw rods are provided on the lower surface of the upper support plate and the upper surface of the lower support plate. The two screw rods are respectively rotatably connected to the upper support plate and the lower support plate. One end of each of the two screw rods respectively rotatably penetrates through the ends of the upper support plate and the lower support plate away from the support frame.

[0012] Preferably, two sections of threads with opposite thread directions are provided on the lateral adjusting lead screw, and the two sections of threads are symmetrically arranged with respect to the central vertical plane of the lateral adjusting lead screw.

[0013] Preferably, the support bar is a strip-shaped square frame structure, which is convenient for it to movably penetrate through the connection block.

[0014] Preferably, the two limiting shafts are symmetrically arranged with respect to the axis of the lateral adjusting lead screw, and the ends of the two toggle frames threadedly penetrated by the lateral adjusting lead screw are centrosymmetric with respect to the central vertical line of the lateral adjusting lead screw, which is convenient for the ends of the two toggle frames threadedly penetrated by the lateral adjusting lead screw to be complementary, so that after the two toggle frames contact at the ends where they are threadedly penetrated by the lateral adjusting lead screw, the remaining parts of the two toggle frames can be symmetric with respect to the axis of the lateral adjusting lead screw, which helps the two support bars to be parallel to each other at this time.

[0015] Preferably, the lateral limiting mechanism includes a strip groove and a slider, the lower end bearing of the movable guide frame is connected to the upper surface of the slider, and the slider is snap-fitted and slidably connected to the strip groove, the strip groove is opened on the surface of the support bar, and limiting rods are provided on both sides of the movable guide frame, and the outer side of each limiting rod is nested and connected with a limiting tube, and each of the limiting tubes is fixedly connected to the corresponding connecting plate.

[0016] Preferably, the longitudinal section of the slider is an I-shaped structure, and its axis is collinear with the axis of the movable guide frame.

[0017] Preferably, the lateral inclination adjustment mechanism includes a slide groove, a longitudinal adjustment screw rod and a limit block, the slide groove is provided on the lower surface of the upper support plate and the upper surface of the lower support plate, and each slide groove is slidably connected to a corresponding connecting plate, the connecting plate is provided with an inclined groove running through both sides thereof, and the corresponding two inclined grooves are respectively movably penetrated by the two ends of the corresponding driving crankshaft, the lower surface of the upper support plate and the upper surface of the lower support plate are fixedly connected to the limit block, and the driving crankshaft is engaged and slides in the corresponding limit block, the lower surface of the upper support plate and the upper surface of the lower support plate are both bearing-connected to the longitudinal adjustment screw rod, and the longitudinal adjustment screw rod thread passes through the middle of the corresponding driving crankshaft.

[0018] Preferably, the limiting block is a U-shaped structure, which is used to limit the driving crankshaft to prevent it from rotating.

[0019] Preferably, the moving range of the two driving crankshafts is between the minimum distance between the two support bars, so as to prevent the driving crankshafts from moving in the vertical direction and hindering the rotation of the support bars.

[0020] Compared with the prior art, the present invention has the following advantages: the cutting position of the metal wire on the wire guide mechanism for the wire cutting machine can be adjusted not only in the longitudinal direction but also in the transverse direction, so that it can be adaptively adjusted according to cutting requirements:

[0021] 1. By rotating the horizontal adjustment screw, the two toggle racks on it can be moved in opposite directions, and then one end of the two support bars can be toggled respectively, so that the support bars rotate with the movable rack as the axis. Then, by rotating the screw, the position of the movable rack can be adjusted, and the longitudinal position of the two ends of the wire cutting part can be adjusted arbitrarily, which helps to improve the cutting flexibility;

[0022] 2. By rotating the longitudinal adjustment screw, the driving crankshaft moves in the vertical direction under the limiting action of the limiting block. Through the movement of the driving crankshaft, the inclined slot drives the connecting plate to move, thereby changing the lateral position of the two ends of the wire cutting part, which helps to arbitrarily adjust the wire cutting part according to the cutting requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of point A;

[0025] Figure 3 This is a schematic diagram of the transverse cross-sectional structure of the present invention;

[0026] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of point B;

[0027] Figure 5 This is a schematic diagram of the longitudinal cross-sectional structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the connection structure of two support bars of the present invention;

[0029] Figure 7 It is a partial cross-sectional structural schematic diagram of the present invention;

[0030] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of point C in the middle.

[0031] In the figure: 1. Support frame; 2. Unwinding wheel; 3. Rewinding wheel; 4. Lateral support plate; 5. Lateral adjustment screw; 6. Upper support plate; 7. Lower support plate; 8. Screw; 9. Slide; 10. Connecting plate; 11. Inclined groove; 12. Driving crankshaft; 13. Longitudinal adjustment screw; 14. Limiting block; 15. Limiting tube; 16. Limiting rod; 17. Movable guide frame; 18. Movable frame; 19. Support bar; 20. Strip groove; 21. Fixed guide frame; 22. Main guide roller; 23. Toggle frame; 24. Secondary guide roller; 25. Limiting shaft; 26. Hinge; 27. Transition guide frame; 28. Connecting block; 29. Conductor; 30. Slider. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1-8 , the present invention provides the following technical solutions:

[0034] Embodiment 1: To solve the problem that the cutting part of the wire on the wire guiding mechanism for wire cutting machine tools cannot be adjusted arbitrarily in the longitudinal direction, the following technical solutions are provided. Specifically, a wire guiding mechanism for a wire cutting machine tool includes a support frame 1, a longitudinal inclination adjustment mechanism, a lateral limit mechanism, and a lateral inclination adjustment mechanism. A wire feeding wheel 2 and a wire take-up wheel 3 are respectively installed inside the support frame 1 from top to bottom. Upper support plates 6 and lower support plates 7 that are parallel to each other are respectively connected to the upper and lower ends of the support frame 1. Main guide rollers 22 are provided at the ends of the upper support plates 6 and the lower support plates 7 where they are connected to the support frame 1. Longitudinal inclination adjustment mechanisms are provided on both the upper support plates 6 and the lower support plates 7. A support bar 19 is connected to the longitudinal inclination adjustment mechanism. A transition guide frame 27 is installed at one end of the upper surface of the support bar 19 close to the main guide roller 22. A lateral limit mechanism is provided at the other end of the support bar 19. A movable guide frame 17 is connected to the lateral limit mechanism. Fixed guide frames 21 are evenly installed on the upper surface of the middle part of the support bar 19. A conductor 29 is also installed on the upper surface of the middle part of the support bar 19.

[0035] The longitudinal inclination adjustment mechanism includes lateral support plates 4, hinges 26 and connection blocks 28. The lateral support plates 4 are arranged on the front and rear sides of the support frame 1. A transverse adjustment screw rod 5 is connected by bearings between the two lateral support plates 4. One end of the transverse adjustment screw rod 5 passes through the corresponding lateral support plate 4 by bearing, and the transverse adjustment screw rod 5 threadedly penetrates through the two toggle frames 23. A secondary guide roller 24 is arranged on each toggle frame 23. The upper end of the upper toggle frame 23 and the lower end of the lower toggle frame 23 are respectively movably penetrated by the corresponding limit shafts 25. The two limit shafts 25 are respectively fixedly connected to the lower surface of the upper support plate 6 and the upper surface of the lower support plate 7. The upper end of the upper toggle frame 23 and the lower end of the lower toggle frame 23 are respectively axially connected to one end of the corresponding support bar 19 through the hinge 26. The support bar 19 movably penetrates through the corresponding connection block 28. The connection block 28 is connected to the surface of the corresponding movable frame 18 by bearing. The movable frame 18 is threadedly penetrated by the corresponding screw rod 8. The screw rod 8 is arranged on the lower surface of the upper support plate 6 and the upper surface of the lower support plate 7. The two screw rods 8 are respectively connected to the upper support plate 6 and the lower support plate 7 by bearing. One end of the two screw rods 8 respectively passes through the upper support plate 6 and the lower support plate 7 away from one end of the support frame 1 by bearing. During use, rotate the transverse adjustment screw rod 5. The two toggle frames 23 threadedly connected to the transverse adjustment screw rod 5 will move in opposite directions. During the movement of the toggle frame 23, it will drive the support bar 19 to rotate around the movable frame 18 through the hinge 26. Then rotate the screw rod 8. During the rotation of the screw rod 8, it will drive the movable frame 18 threadedly connected thereto to move. After the movable frame 18 moves, the distances between the movable frame 18 and the two ends of the support bar 19 will change, thereby changing the rotation angle of the support bar 19. By changing the rotation angle of the support bar 19, the positions of both ends of the wire cutting part can be directly adjusted, so that it can be adjusted arbitrarily in the longitudinal direction, which helps to make adaptive adjustments according to the cutting requirements. The transverse adjustment screw rod 5 is provided with two threads with opposite helix directions, and the two threads are symmetrically arranged with respect to the central vertical plane of the transverse adjustment screw rod 5. The support bar 19 is a strip-shaped square structure, which is convenient for it to movably penetrate through the connection block 28. The two limit shafts 25 are symmetrically arranged with respect to the axis of the transverse adjustment screw rod 5. The ends of the two toggle frames 23 penetrated by the transverse adjustment screw rod 5 are centrosymmetric with respect to the central vertical line of the transverse adjustment screw rod 5, which is convenient for the ends of the two toggle frames 23 penetrated by the transverse adjustment screw rod 5 to be complementary. After the two toggle frames 23 contact at the ends penetrated by the transverse adjustment screw rod 5, the remaining parts of the two toggle frames 23 can be symmetric with respect to the axis of the transverse adjustment screw rod 5, which helps the two support bars 19 to be parallel to each other at this time. The transverse limit mechanism includes a strip-shaped groove 20 and a slider 30. The lower end of the movable guide frame 17 is connected to the upper surface of the slider 30 by bearing. The slider 30 is snap-fitted and slidably connected to the strip-shaped groove 20. The strip-shaped groove 20 is opened on the surface of the support bar 19. Limit rods 16 are arranged on both sides of the movable guide frame 17. A limit tube 15 is nested on the outside of each limit rod 16.Each limiting tube 15 is fixedly connected to the corresponding connecting plate 10. The longitudinal section of the slider 30 is of an I-shaped structure, and its axis is collinear with the axis of the movable guide frame 17.

[0036] Embodiment 2: To solve the problem that the wire cutting part on the wire guiding mechanism for wire cutting machines in the past cannot be adjusted in the horizontal direction, the following technical solution is provided. Specifically, the horizontal limiting mechanism is also connected to the horizontal inclination adjusting mechanism.

[0037] The horizontal inclination adjusting mechanism includes a chute 9, a longitudinal adjusting screw rod 13 and a limiting block 14. The chute 9 is provided on the lower surface of the upper support plate 6 and the upper surface of the lower support plate 7. Each chute 9 is slidably connected with a corresponding connecting plate 10. An inclined groove 11 penetrating through both sides thereof is provided on the connecting plate 10, and the two ends of the corresponding driving crankshaft 12 are movably penetrated through the corresponding two inclined grooves 11 respectively. The limiting blocks 14 are fixedly connected to the lower surface of the upper support plate 6 and the upper surface of the lower support plate 7, and the driving crankshaft 12 is clamped and slid in the corresponding limiting block 14. The longitudinal adjusting screw rods 13 are rotatably connected to the lower surface of the upper support plate 6 and the upper surface of the lower support plate 7, and the longitudinal adjusting screw rod 13 threadedly penetrates through the middle of the corresponding driving crankshaft 12. During use, when the longitudinal adjusting screw rod 13 is rotated, under the limiting action of the limiting block 14, the driving crankshaft 12 can only move in the vertical direction. During the movement of the driving crankshaft 12, through the inclined groove 11, it will drive the connecting plate 10 to move. Through the movement of the connecting plate 10, the movable guide frame 17 can be moved in the horizontal direction. By changing the positions of both ends of the wire cutting part in the horizontal direction, the wire cutting part can be adjusted to a non-vertical situation with the horizontal direction, which helps to meet some special cutting requirements. The limiting block 14 is of a U-shaped structure and is used to limit the driving crankshaft 12 to prevent it from rotating. The moving ranges of the two driving crankshafts 12 are between the minimum distances between the two support bars 19, so as to prevent the driving crankshaft 12 from moving in the vertical direction and hindering the rotation of the support bar 19.

[0038] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wire guiding mechanism for a wire cutting machine tool, comprising a support frame (1), a longitudinal inclination adjusting mechanism, a lateral limiting mechanism and a lateral inclination adjusting mechanism, characterized in that: Inside the said support frame (1), a wire pay-off wheel (2) and a wire take-up wheel (3) are respectively installed from top to bottom. The upper and lower ends of the support frame (1) are respectively connected with parallel upper support plates (6) and lower support plates (7). At the ends where the upper support plate (6) and the lower support plate (7) are connected to the support frame (1), main guide rollers (22) are provided. Longitudinal inclination adjustment mechanisms are provided on both the upper support plate (6) and the lower support plate (7). A support bar (19) is connected to the longitudinal inclination adjustment mechanism. At one end of the upper surface of the support bar (19) close to the main guide roller (22), a transition guide frame (27) is installed. The longitudinal inclination adjustment mechanism includes side support plates (4), hinges (26) and connection blocks (28). The side support plates (4) are provided on the front and rear sides of the support frame (1). A transverse adjustment screw rod (5) is rotatably connected between the two side support plates (4). One end of the transverse adjustment screw rod (5) rotatably penetrates through the corresponding side support plate (4). The transverse adjustment screw rod (5) threadedly penetrates through two toggle frames (23). A secondary guide roller (24) is provided on each toggle frame (23). The upper end of the upper toggle frame (23) and the lower end of the lower toggle frame (23) are respectively rotatably penetrated by corresponding limit shafts (25). The two limit shafts (25) are respectively fixedly connected to the lower surface of the upper support plate (6) and the upper surface of the lower support plate (7). The upper end of the upper toggle frame (23) and the lower end of the lower toggle frame (23) are respectively pivotally connected to one end of the corresponding support bar (19) through hinges (26). The support bar (19) rotatably penetrates through the corresponding connection block (28). The connection block (28) is rotatably connected to the surface of the corresponding movable frame (18). The movable frame (18) is threadedly penetrated by the corresponding screw rod (8). The screw rods (8) are provided on the lower surface of the upper support plate (6) and the upper surface of the lower support plate (7). The two screw rods (8) are respectively rotatably connected to the upper support plate (6) and the lower support plate (7). One end of each of the two screw rods (8) rotatably penetrates through one end of the upper support plate (6) and the lower support plate (7) away from the support frame (1). The other end of the support bar (19) is provided with a transverse limit mechanism. An activity guide frame (17) is connected to the transverse limit mechanism. Fixed guide frames (21) are uniformly installed on the upper surface of the middle part of the support bar (19). A conductor (29) is also installed on the upper surface of the middle part of the support bar (19). The transverse limit mechanism is also connected to a transverse inclination adjustment mechanism.

2. The wire guiding mechanism for a wire cutting machine tool according to claim 1, characterized in that: Two sections of threads with opposite helix directions are provided on the said transverse adjustment screw rod (5), and the two sections of threads are symmetrically arranged with respect to the central vertical plane of the transverse adjustment screw rod (5).

3. The wire guiding mechanism for a wire cutting machine tool according to claim 2, characterized in that: The said support bar (19) is a strip-shaped square frame structure, which is convenient for it to rotatably penetrate through the connection block (28).

4. A wire guiding mechanism for a wire cutting machine tool according to claim 3, characterized in that: The two limiting shafts (25) are symmetrically arranged about the axis of the transverse adjustment screw (5), and the ends of the two toggle frames (23) through which the transverse adjustment screw (5) is threaded are symmetrical about the center of the perpendicular line of the transverse adjustment screw (5), so that the ends of the two toggle frames (23) through which the transverse adjustment screw (5) is threaded are complementary, so that after the two toggle frames (23) are in contact with the ends through which the transverse adjustment screw (5) is threaded, the remaining parts of the two toggle frames (23) can be symmetrical about the axis of the transverse adjustment screw (5), which helps the two support bars (19) to be parallel to each other at this time.

5. The wire guiding mechanism for a wire cutting machine tool according to claim 4, characterized in that: The transverse limiting mechanism includes a strip groove (20) and a slider (30), the lower end bearing of the movable guide frame (17) is connected to the upper surface of the slider (30), and the slider (30) is snap-fitted and slidably connected to the strip groove (20), and the strip groove (20) is opened on the surface of the support bar (19), and limiting rods (16) are provided on both sides of the movable guide frame (17), and the outer side of each limiting rod (16) is nested and connected to the limiting tube (15), and each limiting tube (15) is fixedly connected to the corresponding connecting plate (10).

6. The wire guiding mechanism for a wire cutting machine tool according to claim 5, characterized in that: The longitudinal section of the slider (30) is an I-shaped structure, and its axis is collinear with the axis of the movable guide frame (17).

7. A wire guiding mechanism for a wire cutting machine tool according to claim 6, characterized in that: The lateral tilt adjustment mechanism includes a slide groove (9), a longitudinal adjustment screw rod (13) and a limit block (14), the slide groove (9) is provided on the lower surface of the upper support plate (6) and the upper surface of the lower support plate (7), and each slide groove (9) is slidably connected to a corresponding connecting plate (10), the connecting plate (10) is provided with an inclined groove (11) running through both sides thereof, and the corresponding two inclined grooves (11) are respectively movably penetrated by the two ends of the corresponding driving crankshaft (12), the lower surface of the upper support plate (6) and the upper surface of the lower support plate (7) are fixedly connected to the limit block (14), and the driving crankshaft (12) is engaged and slid in the corresponding limit block (14), the lower surface of the upper support plate (6) and the upper surface of the lower support plate (7) are both bearing-connected with the longitudinal adjustment screw rod (13), and the longitudinal adjustment screw rod (13) is threadedly passed through the middle part of the corresponding driving crankshaft (12).

8. The wire guiding mechanism for a wire cutting machine tool according to claim 7, characterized in that: The limiting block (14) is a U-shaped structure and is used to limit the driving crankshaft (12) to prevent it from rotating.

9. The wire guiding mechanism for a wire cutting machine tool according to claim 8, characterized in that: The movement range of the two driving crankshafts (12) is within the minimum distance between the two support bars (19), thereby preventing the driving crankshafts (12) from moving in the vertical direction and hindering the rotation of the support bars (19).

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