A spark machine Z-axis linear motor transmission structure

Abstract

The utility model discloses a spark machine Z axis linear motor transmission structure, the one side of frame is provided with Z axis main shaft through Z axis guide rail, Z axis main shaft is through linear motor mobile and the linear motor mobile cooperation of frame side, the top of frame is provided with upper support, Z axis main shaft top is provided with cylinder seat, Z axis main shaft one side is through reading head and the grating ruler cooperation of frame side, the cylinder is located in the cylinder seat and Z axis main shaft, the cylinder is upwards and is tightly connected with cylinder seat, the piston rod of cylinder is connected through floating joint and floating joint connecting plate, and floating joint connecting plate is installed in the lower surface of upper support, the utility model discloses reasonable structure, compared with the precision of traditional screw drive is higher, the speed is faster, the dynamic response is faster, and when Z axis main shaft is in the process of lifting along Z axis guide rail, the piston rod of cylinder also stretches out or contracts along, realizes the brake and emergency stop of Z axis main shaft, guarantees the machining precision of adopting linear motor drive.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to the transmission mechanism of an electrical discharge machine tool, specifically a linear motor transmission structure for the Z-axis of an electrical discharge machine. Background Technology

[0002] A discharge machining (DDM) machine, also known as an electrical discharge machine, is a type of machining equipment widely used in the manufacture of various metal molds and mechanical equipment. It uses the electro-erosion effect generated by pulsed discharge between two electrodes immersed in a working fluid to remove conductive materials.

[0003] The Z-axis is the vertically moving spindle in an EDM machine, raised and lowered via guide rails and a lead screw. In existing technology, the lead screw's precision is insufficient for high-precision machining, and wear on the lead screw also affects machining accuracy, with relatively short maintenance cycles. Therefore, an improved technology is urgently needed to address these problems in the existing technology. Utility Model Content

[0004] The purpose of this invention is to provide a linear motor transmission structure for the Z-axis of an EDM machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a Z-axis linear motor transmission structure for an EDM machine, comprising a frame, a Z-axis spindle, a linear motor stator, a linear motor mover, and a braking mechanism;

[0006] Two parallel Z-axis guide rails are provided on one side of the frame in the vertical direction. An upper bracket is provided at the top of the frame. A linear motor stator is provided on the surface of the frame between the two Z-axis guide rails. A grating ruler is provided on the surface of the frame on the outside of one of the Z-axis guide rails through a grating ruler fixing seat.

[0007] One side of the Z-axis spindle is slidably engaged with the Z-axis guide rail via a slider. A linear motor mover is provided on the side of the Z-axis spindle near the frame. The linear motor mover engages with the linear motor stator. A cylinder seat is provided at the top of the Z-axis spindle. A reading head is provided on one side of the Z-axis spindle via a reading head mounting seat. The reading head engages with the grating ruler.

[0008] The braking mechanism includes a cylinder, which is disposed in a cylinder seat and a Z-axis spindle. The piston rod of the cylinder faces upward and is fastened to the cylinder seat. The piston rod of the cylinder is connected to a floating joint connecting plate through a floating joint. The floating joint connecting plate is installed on the lower surface of the upper bracket.

[0009] Preferably, the present invention provides a Z-axis linear motor transmission structure for an EDM machine, wherein an angle steel is provided on the side of the Z-axis spindle away from the reading head, and limit switches are provided at both ends of the angle steel; a limit switch stop block is provided on the surface of the frame near the Z-axis spindle via a support seat, and the limit switch stop block cooperates with two limit switches.

[0010] Preferably, the present invention provides a Z-axis linear motor transmission structure for an EDM machine, wherein two limiting blocks are provided on the surface of the frame near the Z-axis spindle, and a fixed impact block is provided on one side of the Z-axis spindle located at the limiting blocks, and the fixed impact block cooperates with the limiting blocks.

[0011] Preferably, the present invention provides a Z-axis linear motor transmission structure for an EDM machine, wherein a drag chain is connected to one side of the cylinder seat, and the end of the drag chain away from the cylinder seat is connected to the side of the upper support.

[0012] Preferably, the present invention provides a Z-axis linear motor transmission structure for an EDM machine, wherein the bottom of the Z-axis spindle is provided with an electrode mounting hole, and the side wall of the Z-axis spindle is provided with a plurality of heat dissipation holes.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By coordinating the linear motor mover and stator, and using a linear encoder to sense position and motion, this method offers higher precision, faster speed, and quicker dynamic response compared to traditional lead screw drives. Furthermore, the absence of contacting moving parts between the linear motor mover and stator results in a longer lifespan and lower maintenance costs. A cylinder seat is mounted on the upper surface of the Z-axis spindle, with the cylinder securely connected to it. The cylinder is also housed within the Z-axis spindle. As the Z-axis spindle moves up and down along the Z-axis guide rail, the piston rod of the cylinder extends or retracts accordingly. When the Z-axis spindle reaches a predetermined position, the cylinder stops simultaneously, thus achieving braking and emergency stopping of the Z-axis spindle and ensuring the machining accuracy of the linear motor drive. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 For the appendix Figure 1 Enlarged structural diagram of point A in the middle;

[0017] Figure 3 This is a side view of the structure of this utility model;

[0018] Figure 4 For the appendix Figure 3 A schematic diagram of the rear view structure;

[0019] Figure 5This is a top view of the structure of this utility model.

[0020] In the diagram: 1. Frame; 2. Z-axis spindle; 3. Grating ruler; 4. Z-axis guide rail; 5. Upper bracket; 6. Linear motor stator; 7. Slider; 8. Linear motor mover; 9. Cylinder seat; 10. Reading head mounting seat; 11. Reading head; 12. Cylinder; 13. Floating joint; 14. Floating joint connecting plate; 15. Grating ruler fixing seat; 16. Angle steel; 17. Limit switch; 18. Limit switch stop block; 19. Support seat; 20. Limit block; 21. Fixing stop block; 22. Cable chain; 23. Electrode mounting hole; 24. Heat dissipation hole. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", 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 utility model 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 utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution: a Z-axis linear motor transmission structure for an EDM machine, including a frame 1, a Z-axis spindle 2, a linear motor stator 6, a linear motor mover 8, and a braking mechanism;

[0024] Two parallel Z-axis guide rails 4 are provided on one side of the frame 1 in the vertical direction. An upper bracket 5 is provided at the top of the frame 1. A linear motor stator 6 is provided on the surface of the frame 1 between the two Z-axis guide rails 4. A grating ruler 3 is provided on the outside of one of the Z-axis guide rails 4 of the frame 1 through a grating ruler fixing seat 15.

[0025] One side of the Z-axis spindle 2 slides with the Z-axis guide rail 4 via a slider 7. A linear motor mover 8 is located on the side of the Z-axis spindle 2 near the frame 1, and the linear motor mover 8 cooperates with the linear motor stator 6. A cylinder seat 9 is located at the top of the Z-axis spindle 2. A reading head 11 is located on one side of the Z-axis spindle 2 via a reading head mounting seat 10, and the reading head 11 cooperates with the grating ruler 3. An angle steel 16 is located on the side of the Z-axis spindle 2 away from the reading head 11, and limit switches 17 are located at both ends of the angle steel 16. A limit switch stop block 18 is located on the surface of the frame 1 near the Z-axis spindle 2 via a support seat 19. The limit switch stop block 18 cooperates with two limit switches 17. To limit the travel of the Z-axis spindle 2, two limiting blocks 20 are provided on the surface of the frame 1 near the Z-axis spindle 2. A fixed block 21 is provided on the side of the Z-axis spindle 2 near the limiting blocks 20. The fixed block 21 cooperates with the limiting blocks 20 and is located between the two limiting blocks 20 to physically limit the Z-axis spindle 2. A drag chain 22 is connected to one side of the cylinder seat 9. The end of the drag chain 22 away from the cylinder seat 9 is connected to the side of the upper bracket 5. The drag chain 22 facilitates the wiring of the connecting wires of the reading head 11, the grating ruler 3, or the air pipe of the cylinder 12. An electrode mounting hole 23 is opened at the bottom of the Z-axis spindle 2 to realize the installation of the spindle electrode. Several heat dissipation holes 24 are opened on the side wall of the Z-axis spindle 2.

[0026] The braking mechanism includes a cylinder 12, which is located in the cylinder seat 9 and the Z-axis spindle 2. The cylinder 12 faces upward and is fastened to the cylinder seat 9. The piston rod of the cylinder 12 is connected to the floating joint connecting plate 14 through the floating joint 13. The floating joint connecting plate 14 is installed on the lower surface of the upper bracket 5.

[0027] Installation method and operating principle: Securely connect the front end of cylinder 12 to cylinder seat 9. Then insert cylinder 12 into Z-axis spindle 2 and install cylinder seat 9 on the top of Z-axis spindle 2. Slide one side of Z-axis spindle 2 into Z-axis guide rail 4 on one side of frame 1 via slider 7. At this time, the linear motor mover 8 on the inner side of Z-axis spindle 2 engages with the linear motor stator 6 on the outer side of frame 1. Install floating joint connecting plate 14 on the lower surface of upper bracket 5. At this time, floating joint connecting plate 14 is located directly above cylinder 12. Then connect the piston rod of cylinder 12 to floating joint connecting plate 14 via floating joint 13. Finally, the reading head 11 is installed on one side of the Z-axis spindle 2 via the reading head mounting base 10. The grating ruler 3 is installed on the frame 1 via the grating ruler fixing base 15 and cooperates with the reading head 11. Two limit blocks 20 and one limit switch stop block 18 are installed on the surface of the frame 1. The limit switch stop block 18 and the fixing stop block 21 are installed on the side of the Z-axis spindle 2 away from the reading head 11. Angle steel 16 with limit switches 17 at both ends is installed on the side of the Z-axis spindle 2 away from the reading head 11. At this time, the limit switch stop block 18 cooperates with the two limit switches 17, and the fixing stop block 21 is located between the two limit blocks 20, completing the installation. During operation, the Z-axis spindle 2 moves up and down along the Z-axis guide rail 4 through the cooperation of the linear motor mover 8 and the linear motor stator 6. At the same time, when the Z-axis spindle 2 descends, the piston rod of the cylinder 12 extends synchronously, and when the Z-axis spindle 2 rises, the piston rod of the cylinder 12 retracts synchronously.

[0028] This utility model has a reasonable structure. Through the cooperation of the linear motor mover 8 and the linear motor stator 6, and the position and motion sensing through the grating ruler 3, it has higher precision, faster speed and faster dynamic response compared with the traditional ball screw drive. Moreover, there are no contact moving parts between the linear motor mover 8 and the linear motor stator 6, resulting in a longer service life and lower maintenance costs. A cylinder seat 9 is provided on the upper surface of the Z-axis spindle 2, and the cylinder 12 is fastened to the cylinder seat 9. The cylinder 12 is set inside the Z-axis spindle 2. During the process of the Z-axis spindle 2 rising and falling along the Z-axis guide rail 4, the piston rod of the cylinder 12 also extends or retracts. When the Z-axis spindle 2 moves to the predetermined position, the cylinder 12 stops at the same time, thereby realizing the braking and emergency stop of the Z-axis spindle 2 and ensuring the machining accuracy of the linear motor drive.

[0029] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0030] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A linear motor transmission structure for the Z-axis of an EDM machine, characterized in that: It includes a frame (1), a Z-axis spindle (2), a linear motor stator (6), a linear motor mover (8), and a braking mechanism; Two parallel Z-axis guide rails (4) are provided on one side of the frame (1) in the vertical direction. An upper bracket (5) is provided at the top of the frame (1). A linear motor stator (6) is provided on the surface of the frame (1) between the two Z-axis guide rails (4). A grating ruler (3) is provided on the surface of the frame (1) outside one of the Z-axis guide rails (4) through a grating ruler fixing seat (15). The Z-axis spindle (2) is slidably connected to the Z-axis guide rail (4) via a slider (7) on one side. A linear motor mover (8) is provided on the side of the Z-axis spindle (2) near the frame (1). The linear motor mover (8) is connected to the linear motor stator (6). A cylinder seat (9) is provided at the top of the Z-axis spindle (2). A reading head (11) is provided on one side of the Z-axis spindle (2) via a reading head mounting seat (10). The reading head (11) is connected to the grating ruler (3). The braking mechanism includes a cylinder (12), which is disposed in a cylinder seat (9) and a Z-axis spindle (2). The cylinder (12) faces upward and is fastened to the cylinder seat (9). The piston rod of the cylinder (12) is connected to a floating joint connecting plate (14) through a floating joint (13). The floating joint connecting plate (14) is installed on the lower surface of the upper bracket (5).

2. The Z-axis linear motor transmission structure for an EDM machine according to claim 1, characterized in that: An angle steel (16) is provided on the side of the Z-axis spindle (2) away from the reading head (11). Limit switches (17) are provided at both ends of the angle steel (16). Limit switch blocks (18) are provided on the surface of the frame (1) near the Z-axis spindle (2) through the support seat (19). The limit switch blocks (18) cooperate with the two limit switches (17).

3. The Z-axis linear motor transmission structure for an EDM machine according to claim 1, characterized in that: Two limiting blocks (20) are provided on the surface of the frame (1) near the Z-axis spindle (2). A fixed impact block (21) is provided on the side of the Z-axis spindle (20), and the fixed impact block (21) cooperates with the limiting block (20).

4. The Z-axis linear motor transmission structure for an EDM machine according to claim 1, characterized in that: A drag chain (22) is connected to one side of the cylinder seat (9), and the end of the drag chain (22) away from the cylinder seat (9) is connected to the side of the upper bracket (5).

5. The Z-axis linear motor transmission structure for an EDM machine according to claim 1, characterized in that: The bottom of the Z-axis spindle (2) is provided with an electrode mounting hole (23), and the side wall of the Z-axis spindle (2) is provided with a number of heat dissipation holes (24).

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