Workpiece positioning and clamping device of numerical control machine tool

Abstract

The utility model discloses a numerically-controlled machine tool workpiece positioning and clamping device which comprises a mounting base, four connecting plates are arranged on the upper surface of the mounting base, clamping air cylinders are fixedly connected to the upper surfaces of the four connecting plates, the output ends of the clamping air cylinders are fixedly connected with clamping air rods, and the clamping air rods are fixedly connected with the clamping air rods. An abutting plate is fixedly connected to the upper surface of the clamping air rod, a plurality of spring reset air cylinders are fixedly connected to the interior of the abutting plate, and the output end of each spring reset air cylinder is fixedly connected with a spring reset air rod. The multiple spring reset air rods evenly distributed in the abutting plate make contact with a workpiece firstly, all the spring reset air rods can automatically stretch out and draw back according to the fluctuation of the surface of the workpiece, accurate preliminary positioning of the workpiece is achieved, it is ensured that the workpiece is located at the proper position before being clamped, and the subsequent machining precision is improved; the device can flexibly adjust the position of the clamping air cylinder by adjusting the sliding groove and the sliding block, and the use efficiency and economical efficiency of the device are improved.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool processing technology, and in particular to a CNC machine tool workpiece positioning and clamping device. Background Technology

[0002] A CNC machine tool is an automated machine tool equipped with a program control system. Integrating mechanical, automation, computer, and microelectronic technologies, CNC machine tools solve the problem of machining complex, precision, and small-batch parts, making them a flexible and highly efficient automated machine tool. CNC machine tools are characterized by strong adaptability to the workpiece, high machining accuracy, stable machining quality, high productivity, high reliability, and improved working conditions. CNC machine tools can operate and machine parts according to a pre-programmed sequence.

[0003] During the use of workpiece positioning and clamping devices on CNC machine tools, the clamping devices can only clamp the workpiece but cannot position it well, resulting in a reduction in subsequent machining accuracy. Utility Model Content

[0004] The purpose of this utility model is to provide a CNC machine tool workpiece positioning and clamping device. Multiple spring return air rods evenly distributed in the contact plate first contact the workpiece. Each spring return air rod can automatically extend and retract according to the undulations of the workpiece surface, thereby fitting with the workpiece surface at multiple points, achieving accurate preliminary positioning of the workpiece, ensuring that the workpiece is in a suitable position before clamping, and improving the accuracy of subsequent processing.

[0005] To achieve the above objectives, a CNC machine tool workpiece positioning and clamping device is provided, comprising: a mounting base, four connecting plates disposed on the upper surface of the mounting base, clamping cylinders fixedly connected to the upper surfaces of the four connecting plates, clamping air rods fixedly connected to the output ends of the clamping cylinders, abutment plates fixedly connected to the upper surfaces of the clamping air rods, and a plurality of spring return cylinders fixedly connected inside the abutment plates, with a spring return air rod fixedly connected to the output end of each spring return cylinder. This constructs a complete positioning and clamping structure, with multiple cylinders working together to improve positioning accuracy and clamping stability.

[0006] According to the CNC machine tool workpiece positioning and clamping device, multiple spring return cylinders are evenly embedded in the contact plate, and the output end of each spring return cylinder is disposed downward on the lower surface of the contact plate. The even distribution and downward orientation of the spring return cylinders ensures uniform force distribution at all points on the workpiece, resulting in more accurate positioning.

[0007] According to the workpiece positioning and clamping device for CNC machine tools, the spring return cylinder and the clamping cylinder have opposite output directions. These opposite output directions allow them to complement each other, enhancing the clamping force and preventing excessive impact on the workpiece.

[0008] According to the CNC machine tool workpiece positioning and clamping device, the upper surface of the mounting base is provided with adjusting grooves on all four sides, and the adjusting grooves are fixedly connected to sliders by hexagonal socket head cap screws. The adjusting grooves and sliders cooperate to flexibly adjust the position to meet the positioning requirements of workpieces of different sizes.

[0009] According to the CNC machine tool workpiece positioning and clamping device, a connecting plate is fixedly connected to the upper surface of the slider, and the upper surface of the connecting plate is fixedly connected to the clamping cylinder. The slider drives the connecting plate and the clamping cylinder to move, ensuring that the device is adaptable to clamping operations of various workpieces.

[0010] According to the CNC machine tool workpiece positioning and clamping device, the connecting plate and the mounting base are arranged in parallel, and positioning mounting holes are formed around the lower surface of the mounting base. The parallel arrangement ensures structural stability, and the positioning mounting holes facilitate fixing, thus improving the ease of installation of the device.

[0011] The above-mentioned solution has the following beneficial effects:

[0012] This utility model is equipped with a clamping cylinder, a clamping rod, a contact plate, a spring return cylinder, and a spring return rod. Multiple spring return rods evenly distributed in the contact plate first contact the workpiece. Each spring return rod can automatically extend and retract according to the undulations of the workpiece surface, thereby fitting with the workpiece surface at multiple points, achieving accurate preliminary positioning of the workpiece, ensuring that the workpiece is in a suitable position before clamping, and improving the accuracy of subsequent processing.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a perspective view of a CNC machine tool workpiece positioning and clamping device according to the present invention;

[0016] Figure 2 This is a front view of a CNC machine tool workpiece positioning and clamping device according to the present invention;

[0017] Figure 3 This is a cross-sectional perspective view of a CNC machine tool workpiece positioning and clamping device according to the present invention;

[0018] Figure 4 For utility model Figure 3 Enlarged view of the structure at point A in the middle.

[0019] Legend:

[0020] 1. Mounting base; 2. Positioning mounting hole; 3. Adjusting slide; 4. Slider; 5. Hex socket head cap screw; 6. Connecting plate; 7. Clamping cylinder; 8. Clamping rod; 9. Contact plate; 10. Spring return cylinder; 11. Spring return rod. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-4This utility model discloses a workpiece positioning and clamping device for a CNC machine tool, comprising: a mounting base 1, four connecting plates 6 on the upper surface of the mounting base 1, clamping cylinders 7 fixedly connected to the upper surfaces of the four connecting plates 6, clamping rods 8 fixedly connected to the output ends of the clamping cylinders 7, abutment plates 9 fixedly connected to the upper surface of the clamping rods 8, and a plurality of spring return cylinders 10 fixedly connected inside the abutment plates 9, each spring return cylinder 10 having a spring return rod 11 fixedly connected to its output end, and the plurality of spring return cylinders 10 being evenly embedded within... Inside the contact plate 9, the output end of each spring return cylinder 10 is positioned downwards on the lower surface of the contact plate 9. The output directions of the spring return cylinder 10 and the clamping cylinder 7 are opposite. Adjustment grooves 3 are provided around the upper surface of the mounting base 1. A slider 4 is fixedly connected to the adjustment groove 3 via hexagonal socket head cap screws 5. A connecting plate 6 is fixedly connected to the upper surface of the slider 4, and the upper surface of the connecting plate 6 is fixedly connected to the clamping cylinder 7. The connecting plate 6 is parallel to the mounting base 1. Positioning mounting holes 2 are provided around the lower surface of the mounting base 1. Four connecting plates 6 are provided on the upper surface of the mounting base 1, which allows the connecting plates 6 to be stably installed on the mounting base 1, providing a support foundation for the subsequent installation of the clamping cylinder 7. The clamping cylinder 7 is fixedly connected to the upper surface of the four connecting plates 6, and the connecting plates 6 provide the installation position for the clamping cylinder 7, ensuring that the clamping cylinder 7 can work stably above the mounting base 1. The output end of the clamping cylinder 7 is fixedly connected to the clamping rod 8. When the clamping cylinder 7 works, it can transmit power to the clamping rod 8, causing the clamping rod 8 to perform corresponding extension and retraction movements. A contact plate 9 is fixedly connected to the surface. The movement of the clamping air rod 8 drives the contact plate 9 to move, so that the contact plate 9 can perform a contact operation on the workpiece. Several spring return air cylinders 10 are fixedly connected inside the contact plate 9. The contact plate 9 provides installation space and protection for the spring return air cylinders 10, so that the spring return air cylinders 10 can work stably inside. The output end of each spring return air cylinder 10 is fixedly connected to a spring return air rod 11. When the spring return air cylinder 10 is working, it can drive the spring return air rod 11 to perform telescopic movement to achieve a specific function.

[0023] Multiple spring return cylinders 10 are evenly embedded within the contact plate 9. This even distribution ensures that the contact plate 9 experiences more uniform force, allowing for better action on the workpiece. The output end of each spring return cylinder 10 is positioned downwards on the lower surface of the contact plate 9. This orientation facilitates direct action of the spring return cylinder 11 on the workpiece, enabling positioning or clamping operations. The output directions of the spring return cylinders 10 and clamping cylinders 7 are opposite, allowing them to work together for more precise and stable positioning and clamping of the workpiece. Adjustment grooves 3 are provided around the upper surface of the mounting base 1, providing a track for the movement of the slider 4 and facilitating position adjustment. The slider 4 is fixedly connected to the adjustment groove 3 via hexagonal socket head cap screws 5, which secure the slider 4 to a specific position within the adjustment groove 3, ensuring its stability. A connecting plate 6 is fixedly connected to the upper surface of the slider 4; movement of the slider 4 moves the connecting plate 6, thus achieving clamping. The position of cylinder 7 is adjusted, and the upper surface of connecting plate 6 is fixedly connected to clamping cylinder 7. Connecting plate 6 provides stable installation support for clamping cylinder 7, ensuring that clamping cylinder 7 can work normally. Connecting plate 6 and mounting base 1 are set in parallel. This parallel setting ensures the flatness and stability of clamping cylinder 7 installation, allowing it to play a better role. Positioning mounting holes 2 are opened around the lower surface of mounting base 1. Positioning mounting holes 2 make it easy to fix mounting base 1 in a specific position, so that the entire positioning clamping device can be installed and used stably. The inside of spring return cylinder 10 is a sealed space, requiring no external operation. This sealed space design allows spring return cylinder 10 to achieve automatic reset by relying on its own internal spring and air pressure, reducing the complexity of external operation and improving the working efficiency and stability of the device. Clamping cylinder 7 is controlled by an external air pipe connection structure. The external air pipe connection structure can provide the required air pressure for clamping cylinder 7. By controlling the magnitude and direction of air pressure, the working state of clamping cylinder 7 can be precisely controlled to achieve effective clamping of workpiece.

[0024] Working Principle: First, the mounting base 1 is installed in the designated working position of the CNC machine tool through the positioning mounting holes 2 opened around its lower surface, using appropriate mounting bolts and other fasteners. This ensures the mounting base 1 is stable and accurately positioned. Based on the size and shape of the workpiece to be processed, the internal hexagonal positioning bolts 5 on the adjusting slide 3 are loosened. The slider 4 moves within the adjusting slide 3, adjusting the position of the four connecting plates 6, and subsequently adjusting the position of the clamping cylinder 7 fixed to the upper surface of the connecting plates 6 to meet the workpiece's positioning requirements. After adjustment, the internal hexagonal positioning bolts 5 are tightened to fix the positions of the slider 4 and connecting plates 6. An external air pipe is connected to the air pipe connection interface of the clamping cylinder 7. By controlling the external air pipe connection structure, air pressure is input into the clamping cylinder 7. When the clamping cylinder 7 operates, its output clamping rod 8 extends, driving the contact plate 9 fixedly connected to it to move towards the workpiece. When the contact plate 9 approaches the workpiece, the spring return rod 11 of the spring return cylinder 10 first contacts the workpiece. Since the spring return cylinder 10 has a sealed interior, no external operation is required. The internal spring action allows the spring return rod 11 to automatically adjust its position according to the workpiece's surface condition after contact, performing initial workpiece positioning. The clamping cylinder 7 is then controlled, causing the clamping rod 8 to extend further, and the contact plate 9 to continue approaching the workpiece until it firmly presses against it. At this point, the clamping cylinder 7 completes the clamping operation, firmly fixing the workpiece in the designated position for subsequent processing. After processing, the external air pipe connection structure is controlled to change the direction of the air pressure input to the clamping cylinder 7, causing the clamping rod 8 to retract. As the clamping rod 8 retracts, the contact plate 9 leaves the workpiece, and simultaneously, the spring return rod 11 of the spring return cylinder 10 automatically resets to its initial position under the action of the internal spring. The internal hexagonal positioning bolt 5 is then loosened again. Based on the condition of the next workpiece to be processed, the positions of the slider 4 and connecting plate 6 are adjusted to prepare for the next workpiece positioning and clamping operation.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A workpiece positioning and clamping device for a CNC machine tool, comprising: The mounting base (1) is characterized in that: four connecting plates (6) are provided on the upper surface of the mounting base (1), and clamping cylinders (7) are fixedly connected to the upper surfaces of the four connecting plates (6). A clamping rod (8) is fixedly connected to the output end of the clamping cylinder (7). A contact plate (9) is fixedly connected to the upper surface of the clamping rod (8). A plurality of spring return cylinders (10) are fixedly connected inside the contact plate (9). A spring return rod (11) is fixedly connected to the output end of each spring return cylinder (10).

2. The CNC machine tool workpiece positioning and clamping device according to claim 1, characterized in that: Multiple spring reset cylinders (10) are evenly embedded in the contact plate (9), and the output end of each spring reset cylinder (10) is disposed on the lower surface of the contact plate (9) with its output end facing downward.

3. The CNC machine tool workpiece positioning and clamping device according to claim 1, characterized in that: The spring reset cylinder (10) and the clamping cylinder (7) have opposite output directions.

4. The CNC machine tool workpiece positioning and clamping device according to claim 1, characterized in that: The upper surface of the mounting base (1) is provided with adjustment grooves (3) around the perimeter, and the adjustment grooves (3) are fixedly connected to sliders (4) by internal hexagonal positioning bolts (5).

5. A CNC machine tool workpiece positioning and clamping device according to claim 4, characterized in that: The upper surface of the slider (4) is fixedly connected to the connecting plate (6), and the upper surface of the connecting plate (6) is fixedly connected to the clamping cylinder (7).

6. The CNC machine tool workpiece positioning and clamping device according to claim 5, characterized in that: The connecting plate (6) and the mounting base (1) are arranged in parallel, and the mounting base (1) has positioning mounting holes (2) on all four sides of its lower surface.

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