Electrode grabbing gripper of electric spark forming machine tool

Abstract

The utility model relates to the technical field of electrode grabbing claws, in particular to an electric spark forming machine tool electrode grabbing claw which comprises a bearing block, sliding columns fixedly connected to the two sides of the bearing block respectively, a containing frame connected between the sliding columns in a sliding mode, a clamping assembly installed on the bearing block, and a clamping assembly installed on the bearing block. The moving assembly is installed on the inner wall of the containing frame, the clamping assembly is rotationally connected to the two sides of the bearing block, gears are meshed with each other and fixed to the clamping rod, the driving assembly drives the clamping handle to rotate to achieve clamping, and the driving assembly is separated from the clamping part through the design. Compared with the prior art, the gripper has the advantages that the clamping degree is affected due to the fact that the driving mechanism is located between the two clamping parts, thin electrodes can be clamped more tightly, the clamping firmness is improved, the gripper can better adapt to the electrodes with different thicknesses, whether the electrodes are thick or thin, and appropriate clamping force is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electrode gripper technology, specifically an electrode gripper for an electrical discharge machining (EDM) machine. Background Technology

[0002] As is well known, electrical discharge machining (EDM) directly uses electrical and thermal energy to remove metal materials, and has little to do with the strength and hardness of the workpiece material. Therefore, it can use soft tool electrodes to machine hard workpieces and can process any difficult-to-machine metal and conductive materials. Since the material removal during machining is achieved by the electrical and thermal effects of discharge, the machinability of the material mainly depends on its electrical conductivity and thermal properties, such as melting point, boiling point, specific heat capacity, thermal conductivity, and resistivity, and is almost unrelated to its mechanical properties. This can break through the limitations of traditional cutting tools and enable the machining of hard and tough workpieces with soft tools. It can even machine superhard materials such as polycrystalline diamond and cubic boron nitride. It can machine parts with special requirements such as thin walls, elasticity, low stiffness, micro-holes, irregular holes, and deep holes, and can also machine small characters on molds.

[0003] A search revealed that Chinese utility model patent CN214640805U discloses an electrode gripper for an electrical discharge machining (EDM) machine. The gripper includes a forming electrode gripper body, an electrode gripper linkage mechanism, an electrode gripper drive mechanism, a movable electrode gripper, and an electrode gripper fixing bushing. The electrode gripper fixing bushing is located on the outer side of the forming electrode gripper body, the electrode gripper drive mechanism is located on the inner side of the electrode gripper fixing bushing, the electrode gripper linkage mechanism is located on the side of the electrode gripper drive mechanism, and the movable electrode gripper is located on the side of the electrode gripper linkage mechanism. This device has a simple structure and is easy to operate, resulting in higher production efficiency and processing accuracy, thereby achieving automatic electrode replacement.

[0004] Although the above technical solution solves the problem of automatic electrode replacement, in the above technical solution, when clamping the electrode, the electrode gripper drive mechanism drives the electrode gripper linkage mechanism to make the electrode movable grippers rotate towards each other to clamp the electrode. However, in the above solution, the electrode gripper drive mechanism is located between the two electrode movable grippers, which makes it impossible for the two electrode movable grippers to close completely. For some thin electrodes, it is not possible to clamp them too firmly. In order to solve the above problems, an electrode gripper for EDM machine tools is needed. Utility Model Content

[0005] This utility model addresses the technical problems existing in the prior art by providing an electrode gripper for an electrical discharge machining (EDM) machine.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An electrode gripper for an electrical discharge machining tool, including a support block, and further comprising:

[0007] Sliding columns, each of which is fixedly connected to both sides of the bearing block;

[0008] A holding frame, which is slidably connected between each of the sliding posts, and each of the sliding posts passes through the holding frame;

[0009] A clamping assembly, mounted on the support block, is used to clamp and fix the electrode;

[0010] The clamping assembly includes:

[0011] Clamping rods, each of which is rotatably connected to both sides of the bearing block;

[0012] Each gear is fixedly connected to a corresponding clamping rod, and the gears mesh with each other.

[0013] Each clamping handle is fixedly connected to the corresponding clamping rod.

[0014] A drive assembly, mounted on the support block, is used to drive the clamping handle to rotate.

[0015] Furthermore, a movable component, mounted on the inner wall of the holding frame, is used to move the support block. The movable component includes:

[0016] The first connecting block is fixedly connected to the side of the bearing block;

[0017] The first rotating rod is rotatably connected to the inner wall of the first connecting block;

[0018] The first motor is mounted on the inner wall of the container frame;

[0019] The second rotating rod is rotatably connected to the output shaft of the first motor, and the first rotating rod and the second rotating rod are rotatably connected.

[0020] Furthermore, the driving component includes:

[0021] A curved plate, which is fixedly connected to the clamping rod on one side;

[0022] A second motor is mounted on the support block;

[0023] A connecting assembly is mounted on the output shaft of the second motor and is used to connect the second motor to the bent plate.

[0024] In a further embodiment, the connection component includes:

[0025] A rotating plate, which is fixedly connected to the output shaft of the second motor;

[0026] A connecting plate, wherein the connecting plate is rotatably connected to the rotating plate;

[0027] A connecting column is rotatably connected to the connecting plate, and the connecting column is rotatably connected to the bending plate.

[0028] Based on the aforementioned scheme, each of the rubber pads is fixedly connected to the corresponding clamping rod, and the rubber pads are in contact with each other;

[0029] Trapezoidal grooves are respectively formed on the corresponding clamping handles.

[0030] Beneficial effects:

[0031] This electrode gripper for EDM machines features clamping rods rotatably connected to both sides of a support block within a clamping assembly. Gears mesh with each other, and clamping handles are fixed to the clamping rods. Clamping is achieved by driving the clamping handles to rotate via a drive assembly. This design separates the drive assembly from the clamping parts, avoiding the problem of the drive mechanism being located between the two clamping parts and affecting the clamping degree. For thin electrodes, it enables tighter clamping and improves clamping stability. The meshing of the gears allows the clamping rods on both sides to rotate synchronously, ensuring the stability and symmetry of the clamping process. When clamping the electrode, it can apply clamping force evenly, preventing the electrode from loosening or being damaged due to uneven force. This further improves the clamping effect on various electrodes, especially providing more reliable fixation for thin electrodes. Since the drive assembly does not affect the clamping degree, this gripper can better adapt to electrodes of different thicknesses. Whether the electrode is thick or thin, the appropriate clamping force can be achieved by adjusting the parameters of the drive assembly and the rotation angle of the clamping rods, expanding the gripper's applicability and improving the flexibility of the EDM machine under different processing requirements. Attached Figure Description

[0032] Figure 1 This is a side view of the structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the gear structure of this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the first motor of this utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the first connecting block of this utility model.

[0036] The attached diagram lists the components represented by each number as follows:

[0037] 1. Bearing block; 2. Sliding column; 3. Container frame; 4. Clamping rod; 5. Gear; 6. First connecting block; 7. First rotating rod; 8. First motor; 9. Second rotating rod; 10. Bend plate; 11. Second motor; 12. Rotating plate; 13. Connecting plate; 14. Connecting column; 15. Rubber pad; 16. Trapezoidal groove; 17. Clamping handle. Detailed Implementation

[0038] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0039] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In the description of this utility model, the term "for example" is used to mean "serving as an example, illustration, or description." Any embodiment described as "for example" in this utility model is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use this utility model. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this utility model can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of this utility model with unnecessary detail. Therefore, this utility model is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed herein.

[0041] See Figures 1-4An electrode gripper for an electrical discharge machining (EDM) machine includes a support block 1, sliding columns 2 fixedly connected to both sides of the support block 1, a holding frame 3 slidably connected between the sliding columns 2, and each sliding column 2 passing through the holding frame 3. A clamping assembly is mounted on the support block 1 for clamping and fixing the electrode. Each clamping rod 4 in the clamping assembly is rotatably connected to both sides of the support block 1. Each gear 5 is fixedly connected to the corresponding clamping rod 4 and meshes with each other. Each clamping handle 17 is fixedly connected to the corresponding clamping rod 4. A drive assembly is mounted on the support block 1 for driving the clamping handle 17 to rotate. A moving assembly is mounted on the inner wall of the holding frame 3 for moving the support block 1. A first connecting block 6 in the moving assembly is fixedly connected to the side of the support block 1. A first rotating rod 7 is rotatably connected to the inner wall of the first connecting block 6. A first motor 8 is mounted on the inner wall of the holding frame 3. A second rotating rod 9 is rotatably connected to the output shaft of the first motor 8, and the first rotating rod 7 and the second rotating rod 9 are rotatably connected.

[0042] As the basic support structure of the electrode gripper of the entire EDM machine tool, the bearing block 1 is made of high-strength alloy material to ensure stability when bearing the weight of the electrode and the operating force. Precision-machined grooves are designed on both sides of the bearing block 1 for mounting sliding columns 2. The two sliding columns 2 are fixedly connected to both sides of the bearing block 1, made of stainless steel with a polished surface to reduce frictional resistance with the holding frame 3. The sliding columns 2 penetrate the holding frame 3, providing guidance for the horizontal movement of the bearing block 1. The holding frame 3, as the support frame for the sliding columns 2, is welded from aluminum alloy profiles, making it lightweight and sturdy. Its inner wall has tracks that match the sliding columns 2, ensuring smooth horizontal sliding of the bearing block 1. Two clamping rods 4 are rotatably connected to both sides of the bearing block 1 via precision bearings, forming a symmetrical layout. The clamping rods 4 are made of high-strength carbon steel with a plated surface. It has a rust-proof layer, and each clamping rod 4 is fixed with a gear 5. The adjacent gears 5 of each clamping rod 4 are linked by precision meshing. This design allows the clamping rod 4 on one side to rotate synchronously in the opposite direction when one side of the clamping rod 4 rotates, thereby clamping and releasing the electrode. Each clamping rod 4 has a clamping handle 17 at its end for easy operation. The surface of the clamping handle 17 is covered with a non-slip rubber layer to improve the operating feel. The first connecting block 6 is fixedly connected to the side of the bearing block 1 as a fixed point for the moving component. The first rotating rod 7 is rotatably connected to the inner wall of the first connecting block 6. One end is connected to the bearing block 1, and the other end is connected to the second rotating rod 9 through a coupling. The second rotating rod 9 is rotatably connected to the output shaft of the first motor 8 installed on the inner wall of the holding frame 3. It is connected to the first rotating rod 7 through gear 5 transmission or synchronous belt transmission, thereby realizing the horizontal movement of the bearing block 1 within the holding frame 3.

[0043] First, refer to Figure 3In this embodiment, the bending plate 10 in the drive assembly is fixedly connected to the clamping rod 4 on one side, the second motor 11 is mounted on the bearing block 1, and the connecting assembly is mounted on the output shaft of the second motor 11 to connect the second motor 11 and the bending plate 10.

[0044] The second motor 11 is mounted on the support block 1. It is a high-torque, low-noise DC servo motor, which is connected to the output shaft through a reducer to provide stable power output. The bending plate 10 is used to cooperate with the second motor 11 to drive the clamping rod 4 to rotate.

[0045] Then, refer to Figure 4 In this embodiment, the rotating plate 12 in the connecting assembly is fixedly connected to the output shaft of the second motor 11, the connecting plate 13 is rotatably connected to the rotating plate 12, the connecting column 14 is rotatably connected to the connecting plate 13, and the connecting column 14 is rotatably connected to the bending plate 10.

[0046] The connecting assembly includes a rotating plate 12, a connecting plate 13, and a connecting column 14. The rotating plate 12 is fixedly connected to the output shaft of the second motor 11. The connecting plate 13 is rotatably connected to the rotating plate 12 via a pin. The connecting column 14 is rotatably connected to the connecting plate 13 and connected to the bent plate 10 on the clamping rod 4 on one side via a pin. This design enables the effective transmission of power from the second motor 11 to the clamping rod 4.

[0047] Finally, see Figure 1 In this embodiment, each rubber pad 15 is fixedly connected to the corresponding clamping rod 4, and each rubber pad 15 is in contact with each other. Each trapezoidal groove 16 is respectively opened on the corresponding clamping handle 17.

[0048] Each clamping rod 4 has a soft rubber pad 15 fixed on its inner side. The surface of the rubber pad 15 is designed with anti-slip texture to increase the friction between it and the electrode and prevent the electrode from slipping during processing. The trapezoidal groove 16 is designed to hold the circular electrode.

[0049] Working principle:

[0050] The electrode gripper of this EDM machine tool, when it is necessary to clamp the electrode, firstly, the worker starts the first motor 8. The first motor 8 drives the second rotating rod 9 to rotate, the second rotating rod 9 drives the first rotating rod 7 to rotate, the first rotating rod 7 drives the first connecting block 6 to move, the first connecting block 6 drives the bearing block 1 to move, the bearing block 1 drives the clamping rod 4 to move, and the clamping rod 4 drives the clamping handle 17 to move. After the clamping handle 17 is moved to the position of the electrode, then the second motor 11 is started. The second motor 11 drives the rotating plate 12 to rotate, the rotating plate 12 drives the connecting plate 13 to rotate, the connecting plate 13 drives the connecting column 14 to rotate, the connecting column 14 drives the bending plate 10 to rotate, the bending plate 10 drives the clamping rod 4 on one side to rotate, and the rotation of the clamping rod 4 on one side, in conjunction with the gear 5, drives the clamping rod 4 on the other side to rotate simultaneously, thus clamping the electrode.

[0051] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0052] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An electrode gripping hand for an electrospark forming machine, comprising a carrier block (1), characterized in that: Also include: Sliding column (2), each of the sliding column (2) is fixedly connected to the two sides of the bearing block (1) respectively; Frame (3), the frame (3) is slidingly connected between each of the sliding column (2), and each of the sliding column (2) passes through the frame (3); Clamping assembly, the clamping assembly is installed on the bearing block (1), for clamping fixed electrode; The clamping assembly comprises: Clamping rod (4), each of the clamping rod (4) is rotatably connected to the two sides of the bearing block (1) respectively; Gear (5), each of the gear (5) is fixedly connected to the corresponding clamping rod (4), and each of the gear (5) is engaged; Clamping handle (17), each of the clamping handle (17) is fixedly connected to the corresponding clamping rod (4); Drive assembly, the drive assembly is installed on the bearing block (1), for driving the clamping handle (17) to rotate.

2. According to claim 1, an electrode grabbing hand of an electric spark forming machine, characterized in that: Moving assembly, the moving assembly is installed on the inner wall of the frame (3), for driving the bearing block (1) to move; The moving assembly comprises: First connecting block (6), the first connecting block (6) is fixedly connected to the side of the bearing block (1); First rotating rod (7), the first rotating rod (7) is rotatably connected to the inner wall of the first connecting block (6); First motor (8), the first motor (8) is installed on the inner wall of the frame (3); Second rotating rod (9), the second rotating rod (9) is rotatably connected to the output shaft of the first motor (8), and the first rotating rod (7) and the second rotating rod (9) are rotatably connected.

3. According to claim 2, an electrode grabbing hand of an electric spark forming machine, characterized in that: The drive assembly comprises: Bent plate (10), the bent plate (10) is fixedly connected to the clamping rod (4) on one side; Second motor (11), the second motor (11) is installed on the bearing block (1); Connecting assembly, the connecting assembly is installed on the output shaft of the second motor (11), for connecting the second motor (11) and the bent plate (10).

4. According to claim 3, an electrode grabbing hand of an electric spark forming machine, characterized in that: The connecting assembly comprises: Rotating plate (12), the rotating plate (12) is fixedly connected to the output shaft of the second motor (11); Connecting plate (13), the connecting plate (13) is rotatably connected to the rotating plate (12); Connecting column (14), the connecting column (14) is rotatably connected to the connecting plate (13), and the connecting column (14) is rotatably connected to the bent plate (10).

5. According to claim 4, an electrode grabbing hand of an electric spark forming machine, characterized in that: Rubber pad (15), each of the rubber pad (15) is fixedly connected to the corresponding clamping rod (4), and each of the rubber pad (15) is in contact. Truncated grooves (16), each of which is formed in the corresponding clamping handle (17).

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