Clamp of CNC (computer numerical control) milling machine

Abstract

The utility model relates to the technical field of CNC (computer numerical control) milling machines, in particular to a clamp of a CNC (computer numerical control) milling machine, which is characterized in that the inner side of a side frame is rotatably connected with a bidirectional screw, the two ends of the bidirectional screw are connected with nut seats through threads in a screwing manner, and one sides of the two nut seats are fixedly connected with one sides of two annular pipes respectively; the inner sides of the two annular pipes communicate with a plurality of hydraulic telescopic pipes, the output ends of all the hydraulic telescopic pipes are fixedly connected with clamping plates, one side of the milling machine is fixedly connected with a pump body through bolts, one sides of the two annular pipes communicate with an outlet of the pump body, and flexible adjustment of the distance between the two annular pipes is achieved. The clamp can clamp and limit workpieces with different heights, clamping parts do not need to be adjusted or replaced, and the workpiece machining efficiency and convenience are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of CNC milling machine technology, and in particular to a fixture for a CNC milling machine. Background Technology

[0002] CNC milling machines, as efficient and precise machining equipment, occupy a crucial position in the manufacturing industry. They achieve high-precision machining of workpieces by controlling the movement trajectory of the milling cutter through a computer numerical control system. The fixture, as a key component in the CNC milling process, has a decisive impact on machining efficiency, machining accuracy, and workpiece safety.

[0003] In the machining process of CNC milling machines, the main function of the fixture is to fix the workpiece and ensure its stability during machining, thereby guaranteeing machining quality and efficiency. Utility model patent CN216463050U discloses a fixture for a CNC milling machine, belonging to the field of fixture technology. This fixture includes a base, a first slider slidably connected to the base, and a mounting plate installed on the top of the slider. The slider is driven to move by an electric push rod, achieving rapid clamping and release of the workpiece. This fixture has the advantages of reducing the time wasted on disassembling and fixing the workpiece, and improving machining efficiency.

[0004] In practical applications, existing CNC milling machine fixtures have gradually revealed certain limitations. Especially when clamping and limiting materials of varying heights, current fixture designs often lack flexibility. Specifically, existing fixtures typically require adjusting or replacing clamping components when clamping workpieces of different heights, a cumbersome and time-consuming process that significantly reduces workpiece machining efficiency and convenience. Furthermore, this inflexibility can lead to clamping instability, affecting machining accuracy and workpiece safety. Therefore, to address these shortcomings of existing technologies, we urgently need an innovative CNC milling machine fixture to solve these problems. Utility Model Content

[0005] The purpose of this invention is to provide a fixture for a CNC milling machine, which solves the problem that existing fixtures usually require adjustment or replacement of clamping components when clamping workpieces of different heights, resulting in a cumbersome and time-consuming operation process that greatly reduces the efficiency and convenience of workpiece processing.

[0006] To achieve the above objectives, this utility model provides a fixture for a CNC milling machine, including the milling machine itself.

[0007] It also includes an annular tube that is slidably connected to the upper and lower parts of the inner side of the milling machine, and a side frame that is fixedly connected to one side of the outer wall of the milling machine;

[0008] The inner side of the side frame is rotatably connected to a double-ended screw, and both ends of the double-ended screw are connected to nut seats by threaded engagement. One side of each of the two nut seats is fixedly connected to one side of each of the two annular tubes. The inner side of each of the two annular tubes is connected to several hydraulic telescopic tubes, and a clamping plate is fixedly connected to the output end of each of the hydraulic telescopic tubes. The milling machine side is fixedly connected to a pump body by bolts, and one side of each of the two annular tubes is connected to the outlet of the pump body.

[0009] One side of one of the two annular pipes is connected to a first flexible hose, and one side of the other annular pipe is connected to a second flexible hose. One end of both the first and second flexible hoses is connected to the outlet of the pump body.

[0010] All of the hydraulic telescopic pipes are fitted with tension springs, and one side of the clamp is elastically connected to the inner wall of the annular pipe through the tension springs.

[0011] The top side of the side frame is fixedly connected to a drive motor by bolts. The bottom end of the bidirectional screw is rotatably connected to the bottom inner side of the side frame through a rotating shaft, and the top end of the bidirectional screw passes through the top of the side frame through a bearing sleeve and is connected to the output shaft of the drive motor for transmission.

[0012] The milling machine has side plates fixedly connected to both sides of its inner side, and sliders are fixedly connected to both sides of the two annular tubes. The sliders are slidably connected to the side plates through the slide grooves.

[0013] Each of the two nut seats has a sliding block fixedly connected to one side, and the two sliding blocks are slidably connected to the side wall of the side frame through sliding grooves. The other side of each of the two nut seats has a connecting block fixedly connected to it. The two connecting blocks pass through the side wall of the milling machine through movable grooves, and one side of each connecting block is fixedly connected to one side of each of the two annular tubes.

[0014] This utility model discloses a fixture for a CNC milling machine. Firstly, the fixture achieves flexible adjustment of the distance between two annular tubes through the cooperation of a bidirectional screw and a nut seat. This allows the fixture to clamp and limit workpieces of different heights without the need to adjust or replace clamping components, greatly improving the efficiency and convenience of workpiece processing. The operator only needs to simply start the drive motor to quickly adjust the distance between the annular tubes, saving valuable time. Secondly, the fixture uses a combination structure of hydraulic telescopic tubes and clamping plates to firmly clamp the workpiece. The pump injects hydraulic oil into the annular tubes, which is then transmitted to the clamping plates through the hydraulic telescopic tubes, achieving a secure clamping of the workpiece. This clamping method is not only stable and reliable but also adaptable to workpieces of different shapes and materials, improving the fixture's versatility and adaptability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall main view structure of an embodiment of this utility model.

[0017] Figure 2 This is a rear view structural schematic diagram of an embodiment of the present utility model.

[0018] Figure 3 This is a schematic diagram of the annular tube structure according to an embodiment of the present invention.

[0019] Figure 4 This is a side view structural diagram of an embodiment of the present utility model.

[0020] Figure 5 This is a schematic diagram of the clamping plate structure according to an embodiment of the present utility model.

[0021] 1. Milling machine; 2. Ring tube; 3. Pump body; 4. First hose; 5. Second hose; 6. Side plate; 7. Slider; 8. Slide groove; 9. Side frame; 10. Double-acting screw; 11. Nut seat; 12. Connecting block; 13. Movable groove; 14. Drive motor; 15. Hydraulic telescopic tube; 16. Tension spring; 17. Clamping plate; 18. Sliding groove; 19. Sliding block. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] Please see Figure 1-5A fixture for a CNC milling machine includes a milling machine 1 and an annular tube 2 slidably connected to both the upper and lower parts of the inner side of the milling machine 1. The annular tube 2 is slidably connected to the milling machine 1 and its vertical movement adjusts the position of the workpiece. A hydraulic telescopic tube 15 is connected to the inner side of the annular tube 2 to transmit hydraulic oil and drive a clamping plate 17 to clamp the workpiece. A side frame 9 is fixedly connected to one side of the outer wall of the milling machine 1. A bidirectional screw 10 is rotatably connected to the inner side of the side frame 9. Through rotational movement, it drives two nut seats 11 to move simultaneously in opposite directions, thereby adjusting the distance between the two annular tubes 2 to accommodate workpieces of different heights. Both ends of the bidirectional screw 10 are threadedly connected to nut seats 11. One side of the nut seat 11 is fixedly connected to one side of each of the two annular tubes 2. The inner sides of the two annular tubes 2 are connected to several hydraulic telescopic tubes 15, which extend or shorten under the action of hydraulic oil, driving the clamping plate 17 to clamp or release the workpiece. The flexibility of the hydraulic telescopic tubes 15 allows the fixture to adapt to workpieces of different shapes and sizes. The output ends of all the hydraulic telescopic tubes 15 are fixedly connected to the clamping plate 17, which directly contacts the workpiece. The workpiece is clamped and stabilized by the drive of the hydraulic telescopic tubes 15, ensuring that the workpiece will not move or shake during the processing. One side of the milling machine 1 is fixedly connected to the pump body 3 by bolts, and one side of each of the two annular tubes 2 is connected to the outlet of the pump body 3.

[0024] Furthermore, one side of one of the two annular pipes 2 is connected to a first hose 4, and one side of the other annular pipe 2 is connected to a second hose 5. One end of both the first hose 4 and the second hose 5 is connected to the outlet of the pump body 3. When the pump body 3 is started, hydraulic oil flows into the annular pipe 2 through the first hose 4 and the second hose 5, ensuring that both annular pipes 2 are filled with hydraulic oil, thereby driving the hydraulic telescopic pipe 15 to clamp the workpiece evenly, ensuring the clamping stability and uniformity of the fixture, and improving the processing accuracy.

[0025] Furthermore, all hydraulic telescopic tubes 15 are fitted with tension springs 16, and one side of the clamping plate 17 is elastically connected to the inner wall of the annular tube 2 through the tension springs 16. When the hydraulic telescopic tubes 15 extend or shorten under the action of hydraulic oil, the tension springs 16 extend or shorten accordingly, so that the clamping plate 17 fits tightly against the workpiece, thereby enhancing the clamping force, improving the clamping stability, and adapting to workpieces of different shapes and sizes. The elastic effect of the tension springs 16 makes the clamp more flexible and can adapt to the processing of more types of workpieces.

[0026] Furthermore, a drive motor 14 is fixedly connected to the top side of the side frame 9 by bolts. The bottom end of the bidirectional screw 10 is rotatably connected to the bottom inner side of the side frame 9 through a rotating shaft. The top end of the bidirectional screw 10 is connected to the output shaft of the drive motor 14 through a bearing sleeve. When the drive motor 14 starts, it drives the bidirectional screw 10 to rotate, and the nut seat 11 moves up and down accordingly, driving the annular tube 2 to adjust the spacing. This achieves precise adjustment of the spacing of the annular tube 2, improving processing efficiency and accuracy. It also enables the fixture to quickly adapt to workpieces of different heights, thus improving processing efficiency.

[0027] Furthermore, side plates 6 are fixedly connected to both sides of the inner side of the milling machine 1, and sliders 7 are fixedly connected to both sides of the two annular tubes 2. The sliders 7 are slidably connected to the side plates 6 through the slide grooves 8. The annular tubes 2 move up and down under the drive of the nut seat 11, and the sliders 7 slide in the slide grooves 8 to keep the annular tubes 2 stable.

[0028] Furthermore, each of the two nut seats 11 is fixedly connected to one side with a sliding block 19, and both sliding blocks 19 are slidably connected to the side wall of the side frame 9 through the sliding groove 18. Each of the two nut seats 11 is fixedly connected to the other side with a connecting block 12, and both connecting blocks 12 penetrate the side wall of the milling machine 1 through the movable groove 13. One side of each connecting block 12 is fixedly connected to one side of each of the two annular tubes 2. When the bidirectional screw 10 rotates, the nut seat 11 moves, causing the sliding block 19 to slide in the sliding groove 18, while the connecting block 12 moves in the movable groove 13, ultimately causing the annular tube 2 to adjust its position.

[0029] In summary:

[0030] In operation, the operator first places the workpiece to be processed inside the milling machine 1, ensuring that the workpiece is positioned between the two annular tubes 2. This step is fundamental to the processing preparation, ensuring that the workpiece can be accurately clamped by the fixture. Next, the operator needs to adjust the distance between the two annular tubes 2 according to the height of the workpiece. To do this, the drive motor 14, which is bolted to one side of the top of the side frame 9, is started. The drive motor 14 drives the bidirectional screw 10 to rotate inside the side frame 9. The bottom end of the bidirectional screw 10 is rotatably connected to the bottom of the inner side of the side frame 9 via a rotating shaft, and the top end of the bidirectional screw 10 is connected to the output shaft of the drive motor 14 via a bearing sleeve passing through the top of the side frame 9. When the bidirectional screw 10 rotates, the two nut seats 11 move up and down along the thread direction of the bidirectional screw 10. Since one side of each of the two nut seats 11 is fixedly connected to one side of each of the two annular tubes 2, the two annular tubes 2 also move up and down with the movement of the nut seats 11, thereby achieving uniform clamping and fixing of the upper and lower parts of the workpiece. Each of the two nut seats 11 has a sliding block 19 fixedly connected to one side, and both sliding blocks 19 are slidably connected to the side wall of the side frame 9 through sliding grooves 18. This design ensures the stability of the nut seats 11 during movement. Meanwhile, each of the two nut seats 11 has a connecting block 12 fixedly connected to the other side, and both connecting blocks 12 pass through the side wall of the milling machine 1 through movable grooves 13. One side of each connecting block 12 is fixedly connected to one side of each of the two annular tubes 2. Thus, the movement of the nut seats 11 will ultimately drive the annular tubes 2 to adjust their position. After adjusting the spacing of the annular tubes 2, the operator starts the pump body 3. After the pump body 3 starts, external hydraulic oil is injected into the two annular tubes 2. One side of one of the two annular tubes 2 is connected to a first hose 4, and one side of the other annular tube 2 is connected to a second hose 5. One end of both the first hose 4 and the second hose 5 is connected to the outlet of the pump body 3, ensuring that the hydraulic oil can flow smoothly into the two annular tubes 2. The inner side of the annular tube 2 is connected to several hydraulic telescopic tubes 15. When hydraulic oil enters the annular tube 2, it is transmitted through the hydraulic telescopic tubes 15 to the clamping plate 17 fixedly connected to its output end. The hydraulic telescopic tubes 15 extend or shorten under the action of hydraulic oil, thereby driving the clamping plate 17 to clamp the workpiece securely. All hydraulic telescopic tubes 15 are fitted with tension springs 16, and one side of the clamping plate 17 is elastically connected to the inner wall of the annular tube 2 through the tension springs 16. The elasticity of the tension springs 16 allows the clamping plate 17 to fit more tightly against the workpiece, enhancing the clamping force and improving the clamping stability, while also adapting to workpieces of different shapes and sizes. In addition, side plates 6 are fixedly connected to both sides of the inner side of the milling machine 1, and sliders 7 are fixedly connected to both sides of the two annular tubes 2, with the sliders 7 slidably connected to the side plates 6 through the sliding grooves 8. This design makes the annular tube 2 more stable when moving up and down, avoiding machining errors caused by unstable movement.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A CNC milling machine clamp, comprising a milling machine, characterized in that, It also includes a ring-shaped tube slidingly connected to the upper and lower parts of the inner side of the milling machine, and a side frame fixedly connected to one side of the outer wall of the milling machine; The inner side of the side frame is rotatably connected to a bidirectional screw, and the two ends of the bidirectional screw are threadedly connected to a nut seat, and the two nut seats are fixedly connected to one side of the two ring-shaped tubes, respectively, the inner sides of the two ring-shaped tubes are communicated with a plurality of hydraulic expansion pipes, and the output ends of all the hydraulic expansion pipes are fixedly connected with clamping plates, and the side of the milling machine is fixedly connected with a pump body through bolts, and the sides of the two ring-shaped tubes are communicated with the outlet of the pump body.

2. The CNC milling machine clamp of claim 1, characterized in that, One side of one of the two ring-shaped tubes is communicated with a first hose, and the other ring-shaped tube is communicated with a second hose, and one end of the first hose and the second hose is communicated with the outlet of the pump body.

3. The CNC milling machine clamp of claim 1, characterized in that, All the hydraulic expansion pipes are sleeved with a tension spring, and one side of the clamping plate is elastically connected between the tension spring and the inner wall of the ring-shaped tube.

4. The CNC milling machine clamp of claim 1, characterized in that, The top side of the side frame is fixedly connected with a drive motor through bolts, the bottom end of the bidirectional screw is rotatably connected between the inner side bottom of the side frame through a rotating shaft, and the top end of the bidirectional screw is drivingly connected with the output shaft of the drive motor through a bearing sleeve penetrating the top of the side frame.

5. The CNC milling machine clamp of claim 1, characterized in that, The inner sides of the milling machine are fixedly connected with side plates, and the two sides of the two ring-shaped tubes are fixedly connected with sliding blocks, and the sliding blocks are slidingly connected between the sliding grooves and the side plates.

6. The CNC milling machine clamp of claim 1, characterized in that, One side of the two nut seats is fixedly connected with a sliding block, and the two sliding blocks are slidingly connected between the side wall of the side frame and the sliding grooves, and the other side of the two nut seats is fixedly connected with a connecting block, wherein the two connecting blocks penetrate the side wall of the milling machine through the movable grooves, and one side of the two connecting blocks is fixedly connected with one side of the two ring-shaped tubes, respectively.

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