A wire drawing driving mechanism for a numerical control wire cutting machine tool

Abstract

The utility model discloses a wire drawing drive mechanism for numerical control wire cutting machine tool, include: lower line frame, steel wire guide, drive mechanism and silk seat, one end of steel wire guide is located in lower line frame, drive mechanism is used for driving two steel wire ropes on steel wire guide movement, and the steel wire horizontal section of two steel wire ropes is installed with wire drawing spare, is provided with silk -tight mechanism on silk seat, and drive mechanism side end is provided with displacement mechanism, and displacement mechanism includes fixed plate and cylinder no.

Description

Technical Field

[0001] This utility model relates to the field of wire cutting equipment, specifically a wire drawing drive mechanism for CNC wire cutting machine tools. Background Technology

[0002] CNC wire EDM is a common type of electrical discharge machining, which uses a wire electrode to cut the workpiece by spark discharge. In CNC wire EDM, the relative motion between the workpiece and the wire electrode is controlled by digital information, and it is often used to process high-hardness materials, microstructures, complex shapes, high-precision dimensional parts, and high-surface-quality parts.

[0003] In automatic wire EDM machines with CNC reciprocating feed, when the automatic wire feeding system pulls the electrode wire from the lower wire frame to the wire drum, the existing technology usually uses pressurized fluid (gas or liquid) as an aid to directly guide the molybdenum wire into the wire clamp of the machine's wire drum. This method is prone to electrode wire instability during transmission, making transmission difficult. To solve this problem, a wire hooking mechanism has emerged on the market to hook the molybdenum wire into the wire clamp of the wire drum, and the wire clamp fixes the molybdenum wire to the wire drum. However, this solution still has drawbacks. Its wire hooking mechanism needs to hook the molybdenum wire on its wire puller, requiring a complex structure to achieve high positioning accuracy, which makes its manufacturing and maintenance costs high. Utility Model Content

[0004] The purpose of this invention is to provide a wire drawing drive mechanism for CNC wire cutting machine tools to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wire drawing drive mechanism for a CNC wire cutting machine tool, comprising: a lower wire frame, a wire guide rail, a drive mechanism, and a wire feeding seat. The wire guide rail includes a first wire guide wheel assembly, a second wire guide wheel assembly, a bridge plate, and two wire ropes. The first wire guide wheel assembly is installed inside the lower wire frame, the bridge plate is installed on the side of the drive mechanism, one end of the bridge plate passes through the wire feeding seat, the second wire guide wheel assembly is installed on one end of the bridge plate, and the two wire ropes are wound around the first and second wire guide wheel assemblies. The drive mechanism is used to drive the two wire ropes to move. A wire drawing component is installed on the horizontal section of the wires of the two wire ropes, and a wire tensioning mechanism is provided on the wire feeding seat.

[0006] A displacement mechanism is provided on the side of the drive mechanism. The displacement mechanism includes a fixed plate and a cylinder. The cylinder is mounted on the fixed plate. The drive mechanism includes a frame, a motor, and two molybdenum wire guide wheel sets. The output end of the cylinder is connected to the frame. The two molybdenum wire guide wheel sets drive two steel wire ropes to move respectively. The molybdenum wire guide wheel sets include a driving wheel and two driven wheels. The driving wheel is mounted on the output end of the motor. Two steps are formed at the upper end of the frame. The driven wheels are rotatably mounted on the side wall of the steps. The steel wire ropes are wound around the driving wheel and the two driven wheels.

[0007] Preferably, the wire feeder includes a wire spool, a linear module, and two spool holders, with the two spool holders mounted on the output end of the linear module and the wire spool mounted between the two spool holders.

[0008] Preferably, the wire tensioning mechanism includes a cylinder, a slider, a wire tensioning spring, and a wire tensioning plate. A slide rail is formed on the side end of the wire drum for the slider to slide. The cylinder drives the slider to slide. One end of the slider extends to the outer wall of the wire drum and connects with the wire tensioning component. The wire tensioning spring is installed between the inner wall of the wire drum and the slider.

[0009] Preferably, the other end of the slider extends to the inner wall of the wire drum to form a reset protrusion and a transmission part. One end of the tension spring abuts against the reset protrusion. A transmission roller is provided on the output end of the cylinder two. The transmission roller abuts against the transmission part. Only the end of the transmission part that abuts against the transmission roller has an arc design.

[0010] Preferably, a tensioning mechanism is provided on the frame, which includes a lifting plate and a counterweight. The frame is provided with a second slide for the lifting plate to move up and down. The counterweight is installed at the lower end of the lifting plate, and two drive wheels are installed at the two sides of the lifting plate respectively.

[0011] Preferably, the lifting plate is provided with a wire pressing mechanism, which includes a wire pressing spring, a top rod, two lifting blocks and two pressure rollers. The lifting plate has a slide rail for the lifting blocks to move up and down and a hole for installing the wire pressing spring. The top rod is installed between the two lifting blocks, and the wire pressing spring abuts against the top rod. The pressure rollers are rotatably installed on the side of the lifting blocks, and the outer wall of the pressure rollers has an outer ring protrusion that cooperates with the guide groove of the drive wheel.

[0012] Preferably, the fixed plate is provided with a liftable motor base, the motor is mounted on the motor base, and the output end of the motor passes through the motor base to drive the two drive wheels to rotate.

[0013] As a preferred embodiment, slide rail five, which is connected to slide rail two, is provided on both sides of the frame, and the drive wheel can move up and down along slide rail five.

[0014] Preferably, the frame is provided with several guide posts, and the fixed plate is provided with several guide sleeves that are adapted to the guide posts, and the guide sleeves are slidably mounted on the guide sleeves.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention uses a cylinder to push the molybdenum wire toward the tensioning mechanism, thus placing the molybdenum wire within the fixed range of the tensioning mechanism. The structure is simple and reduces manufacturing and maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the drive mechanism in this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the drive mechanism in this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the drive mechanism in this utility model;

[0021] Figure 5 This is another structural schematic diagram of the drive mechanism in this utility model;

[0022] Figure 6 This is a schematic diagram of the wire guide seat in this utility model;

[0023] Figure 7 This is a schematic diagram of the internal structure of the wire feeder in this utility model;

[0024] Figure 8 This is a schematic diagram of the tensioning mechanism in this utility model;

[0025] Figure 9 This is a schematic diagram of the structure of the wire drawing head of this utility model starting to draw the molybdenum wire;

[0026] Figure 10 This is a schematic diagram of the structure of the wire drawing head of this utility model, which draws the molybdenum wire to the wire spool.

[0027] In the diagram: 1. Drive mechanism; 11. Frame; 111. Step; 112. Slide rail two; 113. Slide rail five; 114. Guide column; 12. Motor; 121. Motor base; 13. Drive wheel; 14. Driven wheel; 2. Displacement mechanism; 21. Fixed plate; 211. Guide sleeve; 22. Cylinder one; 3. Lower wire frame; 4. Wire guide rail; 41. Wire rope; 42. Wire guide wheel group one; 43. Wire guide wheel group two; 44. Bridge plate; 45. Wire drawing component; 5. Wire conveying seat; 51. 511. Wire spool; 52. Slide rail 1; 53. Linear module; 54. Spool base; 6. Wire tensioning mechanism; 61. Cylinder 2; 611. Transmission roller; 62. Slider; 621. Reset protrusion; 622. Transmission part; 63. Wire tensioning spring; 64. Wire tensioning plate; 7. Tensioning mechanism; 71. Lifting plate; 711. Slide rail 3; 72. Counterweight; 8. Wire pressing mechanism; 81. Wire pressing spring; 82. Top rod; 83. Lifting block; 84. Pressure roller; 841. Outer ring protrusion; 9. Molybdenum wire; Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-10 This utility model provides a technical solution for a wire drawing drive mechanism for a CNC wire cutting machine: A wire drawing drive mechanism for a CNC wire cutting machine includes: a lower wire frame 3, a wire guide rail 4, a drive mechanism 1, and a wire feeding seat 5. The wire guide rail 4 includes a first wire guide wheel assembly 42, a second wire guide wheel assembly 43, a bridge plate 44, and two wire ropes 41. The first wire guide wheel assembly 42 is installed inside the lower wire frame 3, and the bridge plate 44 is installed on the side of the drive mechanism 1. One end of the bridge plate 44 passes through the wire feeding seat 5. Group 2 43 is installed at one end of bridge plate 44. Two steel wire ropes are wound around steel wire guide wheel group 1 42 and steel wire guide wheel group 2 43. Drive mechanism 1 is used to drive the movement of two steel wire ropes 41. A wire pulling member 45 is installed on the horizontal section of the steel wire of the two steel wire ropes 41. A wire tensioning mechanism 6 is provided on the wire conveying seat 5. The wire cutting equipment conveys the molybdenum wire 9 into the lower wire frame 3. Then the wire pulling member pulls the molybdenum wire 9 and pulls the molybdenum wire 9 along the steel wire guide rail 4 to the wire tensioning mechanism 6. The wire tensioning mechanism 6 fixes the molybdenum wire 9 on the wire conveying seat 5.

[0030] A displacement mechanism 2 is provided on the side of the drive mechanism 1. The displacement mechanism 2 includes a fixed plate 21 and a cylinder 22. The cylinder 22 is mounted on the fixed plate 21. The drive mechanism 1 includes a frame 11, a motor 12 and two molybdenum wire guide wheel groups. The output end of the cylinder 22 is connected to the frame 11. The two molybdenum wire guide wheel groups drive the two steel wire ropes 41 to move respectively.

[0031] The molybdenum wire guide wheel assembly includes a driving wheel 13 and two driven wheels 14. The driving wheel 13 is mounted on the output end of the motor 12. Two steps 111 are formed at the upper end of the frame 11. The driven wheels 14 are rotatably mounted on the side wall of the steps 111. The steel wire rope 41 is wound around the driving wheel 13 and the two driven wheels 14. The motor 12 drives the driving wheel 13 to rotate so as to drive the steel wire rope 41 to rotate.

[0032] The output end of cylinder 22 is initially in a retracted state. When the wire drawing component pulls the molybdenum wire 9 to the wire tensioning mechanism 6, the output end of cylinder 22 extends and sends the molybdenum wire 9 into the fixed range of the wire tensioning mechanism 6, so that the wire tensioning mechanism 6 can fix the molybdenum wire 9 on the wire feeding seat 5. This utility model uses a cylinder to push the molybdenum wire 9 towards the wire tensioning mechanism 6, so that the molybdenum wire 9 can be placed in the fixed range of the wire tensioning mechanism 6. The structure is simple and reduces manufacturing and maintenance costs.

[0033] In this embodiment, the wire feeding seat 5 includes a wire spool 51, a linear module 52, and two spool seats 53. The two spool seats 53 are installed on the output end of the linear module 52, and the wire spool 51 is installed between the two spool seats 53.

[0034] In this embodiment, the wire tensioning mechanism 6 includes a second cylinder 61, a slider 62, a wire tensioning spring 63, and a wire tensioning plate 64. A slide rail 511 for sliding the slider 62 is formed on the side end of the wire drum 51. The cylinder drives the slider 62 to slide. One end of the slider 62 extends to the outer wall of the wire drum 51 and connects to the wire tensioning component. The wire tensioning spring 63 is installed between the inner wall of the wire drum 51 and the slider 62. The other end of the slider 62 extends to the inner wall of the wire drum 51, forming a reset protrusion 621 and a transmission part 622. One end of the wire tensioning spring 63 abuts against the reset protrusion 621. A transmission roller 611 is provided on the output end of the second cylinder 61. The transmission part 622 abuts against the transmission roller 611. The end of the transmission part 622 that abuts against the transmission roller 611 has an arc design. The cylinder 61 is initially in the retracted state. The tensioning plate 64 is pressed against the outer wall of the wire drum 51 under the action of the tensioning spring 63. When the wire drawing part transports the molybdenum wire 9 to the bottom of the wire drum, the cylinder 61 drives the transmission roller 611 to extend and drive the slider 62 to move towards the outside of the wire drum 51, so that the tensioning plate 64 is separated from the outer wall of the wire drum 51. Then the cylinder 22 pushes the molybdenum wire 9 between the tensioning plate 64 and the wire drum 51. Finally, the cylinder 61 retracts, and the tensioning plate 64 clamps and fixes the molybdenum wire 9 on the outer wall of the wire drum 51.

[0035] In this embodiment, a tensioning mechanism 7 is provided on the frame 11. The tensioning mechanism 7 includes a lifting plate 71 and a counterweight 72. A slide rail 112 is provided on the frame 11 for the lifting plate 71 to move up and down. The counterweight 72 is installed at the lower end of the lifting plate 71. Two drive wheels 13 are respectively installed at the two sides of the lifting plate 71. The counterweight 72 drives the drive wheels 13 to move downward, so that the wire rope 41 is kept taut.

[0036] In this embodiment, a wire pressing mechanism 8 is provided on the lifting plate 71. The wire pressing mechanism 8 includes a wire pressing spring 81, a top rod 82, two lifting blocks 83, and two pressure rollers 84. The lifting plate 71 has a slide rail 711 for the lifting blocks 83 to move up and down and a hole for installing the wire pressing spring 81. The top rod 82 is installed between the two lifting blocks 83. The wire pressing spring 81 abuts against the top rod 82. The pressure rollers 84 are rotatably installed on the side of the lifting blocks 83. The outer wall of the pressure rollers 84 has an outer ring protrusion 841 that cooperates with the guide groove of the drive wheel 13. The wire pressing spring 81 applies force to make the outer ring protrusion 841 press the wire rope 41 tightly in the guide groove of the drive wheel 13 to prevent the wire rope 41 from falling off.

[0037] In this embodiment, a liftable motor base 121 is provided on the fixed plate 21. The motor 12 is mounted on the motor base 121. The output end of the motor 12 passes through the motor base 121 to drive two drive wheels 13 to rotate. The motor base 121 and the motor 12 follow the drive wheels 13 to rise and fall.

[0038] In this embodiment, slide rails 113 connected to slide rail 2 112 are respectively provided on both sides of the frame 11, and the drive wheel 13 can move up and down along slide rail 5 113.

[0039] In this embodiment, a plurality of guide posts 114 are provided on the frame 11, and a plurality of guide sleeves 211 adapted to the guide posts 114 are provided on the fixing plate 21. The guide sleeves 211 are slidably installed on the guide sleeves 211, so that the frame 11 moves more smoothly when the cylinder 22 drives it.

[0040] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wire drawing drive mechanism for a CNC wire cutting machine, comprising: The lower wire frame (3), wire guide rail (4), drive mechanism (1) and wire conveying seat (5) are provided. The wire guide rail (4) includes a first wire guide wheel group (42), a second wire guide wheel group (43), a bridge plate (44) and two wire ropes (41). The first wire guide wheel group (42) is installed inside the lower wire frame (3). The bridge plate (44) is installed on the side of the drive mechanism (1). One end of the bridge plate (44) passes through the wire conveying seat (5). The second wire guide wheel group (43) is installed on one end of the bridge plate (44). The two wire ropes are wound around the first wire guide wheel group (42) and the second wire guide wheel group (43). The drive mechanism (1) is used to drive the two wire ropes (41) to move. A wire pulling part (45) is installed on the horizontal section of the wire of the two wire ropes (41). A wire tensioning mechanism (6) is provided on the wire conveying seat (5). The characteristic is that the drive mechanism (1) is provided with a displacement mechanism (2) on its side. The displacement mechanism (2) includes a fixed plate (21) and a cylinder (22). The cylinder (22) is mounted on the fixed plate (21). The drive mechanism (1) includes a frame (11), a motor (12) and two molybdenum wire guide wheel groups. The output end of the cylinder (22) is connected to the frame (11). The two molybdenum wire guide wheel groups drive two steel wire ropes (41) to move respectively. The molybdenum wire guide wheel assembly includes a drive wheel (13) and two driven wheels (14). The drive wheel (13) is mounted on the output end of the motor (12). Two steps (111) are formed on the upper end of the frame (11). The driven wheels (14) are rotatably mounted on the side wall of the steps (111). The steel wire rope (41) is wound around the drive wheel (13) and the two driven wheels (14).

2. The wire drawing drive mechanism (1) for a CNC wire cutting machine tool according to claim 1, characterized in that, The wire feeder (5) includes a wire spool (51), a linear module (52), and two spool holders (53). The two spool holders (53) are installed on the output end of the linear module (52), and the wire spool (51) is installed between the two spool holders (53).

3. The wire drawing drive mechanism (1) for a CNC wire cutting machine tool according to claim 2, characterized in that, The tensioning mechanism (6) includes a second cylinder (61), a slider (62), a tensioning spring, and a tensioning plate (64). A slide rail (511) is formed on the side end of the wire drum (51) for the slider (62) to slide. The cylinder drives the slider (62) to slide. One end of the slider (62) extends to the outer wall of the wire drum (51) and connects with the tensioning component. The tensioning spring is installed between the inner wall of the wire drum (51) and the slider (62).

4. The wire drawing drive mechanism (1) for a CNC wire cutting machine tool according to claim 3, characterized in that, The other end of the slider (62) extends into the inner wall of the wire drum (51) to form a reset protrusion (621) and a transmission part (622). One end of the tension spring abuts against the reset protrusion (621). A transmission roller (611) is provided on the output end of the cylinder (61). The transmission roller (611) abuts against the transmission part (622). Only the end of the transmission part (622) that abuts against the transmission roller (611) has an arc design.

5. The wire drawing drive mechanism (1) for a CNC wire cutting machine tool according to claim 1, characterized in that, The frame (11) is provided with a tensioning mechanism (7), which includes a lifting plate (71) and a counterweight (72). The frame (11) is provided with a slide rail (112) for the lifting plate (71) to move up and down. The counterweight (72) is installed at the lower end of the lifting plate (71), and two drive wheels (13) are installed at the two sides of the lifting plate (71).

6. The wire drawing drive mechanism (1) for a CNC wire cutting machine tool according to claim 5, characterized in that, The lifting plate (71) is provided with a wire pressing mechanism (8), which includes a wire pressing spring (81), a top rod (82), two lifting blocks (83) and two pressure rollers (84). The lifting plate (71) has a slide rail (711) for the lifting blocks (83) to move up and down and a hole for installing the wire pressing spring (81). The top rod (82) is installed between the two lifting blocks (83). The wire pressing spring (81) abuts against the top rod (82). The pressure rollers (84) are rotatably installed on the side of the lifting blocks (83). The outer wall of the pressure rollers (84) has an outer ring protrusion (841) that cooperates with the guide groove of the drive wheel (13).

7. The wire drawing drive mechanism (1) for a CNC wire cutting machine tool according to claim 6, characterized in that, The fixed plate (21) is provided with a liftable motor base (121), the motor (12) is mounted on the motor base (121), and the output end of the motor (12) passes through the motor base (121) to drive the two drive wheels (13) to rotate.

8. The wire drawing drive mechanism (1) for a CNC wire cutting machine tool according to claim 5, characterized in that, The frame (11) has slide five (113) connected to slide two (112) on both sides, and the drive wheel (13) can move up and down along slide five (113).

9. The wire drawing drive mechanism (1) for a CNC wire cutting machine tool according to claim 1, characterized in that, The frame (11) is provided with a number of guide posts (114), and the fixing plate (21) is provided with a number of guide sleeves (211) adapted to the guide posts (114). The guide sleeves (211) are slidably installed on the guide sleeves (211).

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