High-precision clamp for CNC machine tool

Abstract

The utility model discloses a high-precision clamp for a CNC machine tool. The high-precision clamp comprises a base, an upper clamping mechanism, a lower clamping mechanism, a supporting mechanism and a positioning mechanism, wherein the upper clamping mechanism and the lower clamping mechanism are used for clamping sheet metal accessories; the supporting mechanism is used for supporting the sheet metal accessories; the multiple upper clamping mechanisms and the multiple lower clamping mechanisms are arranged, the upper clamping mechanisms and the lower clamping mechanisms interact with each other and clamp the outer edges of the metal plate accessories, and the multiple supporting mechanisms are located at the bottoms of the metal plate accessories. The multiple positioning mechanisms abut against the side face of the outer edge of the metal plate accessory. The upper clamping mechanism and the lower clamping mechanism are matched to clamp the outer edge of a metal plate accessory, the supporting mechanism supports the bottom, the positioning mechanism limits the installation position, multi-directional constraint is formed, and accurate positioning and firm clamping of the metal plate accessory are achieved through the synergistic effect of all the mechanisms. And the dimensional precision, form and location tolerance and the like of the machined surface meet the requirements.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically to a high-precision fixture for CNC machine tools. Background Technology

[0002] In modern manufacturing, CNC machine tools, with their high precision and high efficiency, have become the core equipment for sheet metal parts processing. During sheet metal parts processing, the fixture, as a key component connecting the machine tool and the workpiece, directly affects processing accuracy and production efficiency.

[0003] Existing CNC machine tool fixtures rely solely on clamps for fixation. The clamping force provided by the clamps is limited and unevenly distributed. When dealing with large or complex-shaped sheet metal parts, it is difficult to provide sufficient and uniform clamping force. During the machining process, the workpiece is prone to loosening and displacement, resulting in dimensional deviations and increased scrap rate. At the same time, the clamps apply pressure from only one direction, lacking multi-dimensional constraints on the sheet metal parts, making it difficult to meet the positioning accuracy requirements of high-precision machining.

[0004] Based on the above, this utility model proposes a high-precision fixture for CNC machine tools, which can effectively solve the above problems. Utility Model Content

[0005] This utility model addresses the shortcomings of the existing technology by providing a high-precision fixture for CNC machine tools.

[0006] This utility model is achieved through the following technical solution:

[0007] A high-precision fixture for CNC machine tools includes a base, an upper clamping mechanism and a lower clamping mechanism for clamping sheet metal parts, a support mechanism for supporting the sheet metal parts, and a positioning mechanism for limiting the installation position of the sheet metal parts. Multiple upper and lower clamping mechanisms are provided, and they interact to clamp the outer edge of the sheet metal parts. Multiple support mechanisms are provided and located at the bottom of the sheet metal parts. Multiple positioning mechanisms are provided and abut against the outer edge of the sheet metal parts.

[0008] According to the above technical solution, as a further preferred technical solution, the upper clamping mechanism includes a first hydraulic cylinder, a pressure block, a fixing block, and a connecting rod; the first hydraulic cylinder is installed inside the base, the extension end of the first hydraulic cylinder is rotatably connected to the pressure block, the middle part of the pressure block is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the fixing block; a pressing part is provided on the side of the pressure block away from the extension end of the first hydraulic cylinder, or a pressing rod fixedly connected to the pressure block is provided on the side of the pressure block away from the extension end of the first hydraulic cylinder.

[0009] According to the above technical solution, as a further preferred technical solution, the lower clamping mechanism includes a second hydraulic cylinder installed inside the base, and the telescopic end of the second hydraulic cylinder abuts against the bottom of the outer edge of the sheet metal part.

[0010] According to the above technical solution, as a further preferred technical solution, the support mechanism includes a support cylinder, and the telescopic end of the support cylinder abuts against the lower surface of the sheet metal part.

[0011] According to the above technical solution, as a further preferred technical solution, the positioning mechanism includes a positioning rod that abuts against the outer edge of the sheet metal part, and a connecting block is fixedly connected to the bottom of the positioning rod, and the connecting block is fixedly connected to the base.

[0012] According to the above technical solution, as a further preferred technical solution, the four corners of the base are respectively fixedly connected with lifting rings.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] This utility model provides a high-precision fixture for CNC machine tools. The upper and lower clamping mechanisms work together to clamp the outer edge of sheet metal parts, the support mechanism supports the bottom, and the positioning mechanism restricts the installation position, forming multi-directional constraints. Through the coordinated action of each mechanism, the sheet metal parts are accurately positioned and firmly clamped, providing stable workpiece clamping conditions for high-precision machining of CNC machine tools, and ensuring that the dimensional accuracy and geometric tolerances of the machined surface meet the requirements. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram illustrating the application of this utility model;

[0017] Figure 3 This is a schematic diagram of the upper clamping mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of another form of the upper clamping mechanism of this utility model. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0020] A high-precision fixture for CNC machine tools includes a base 1, an upper clamping mechanism 3 and a lower clamping mechanism 4 for clamping sheet metal parts 2, a support mechanism 5 for supporting sheet metal parts 2, and a positioning mechanism 6 for limiting the installation position of sheet metal parts 2; multiple upper clamping mechanisms 3 and lower clamping mechanisms 4 are provided, and the upper clamping mechanisms 3 and lower clamping mechanisms 4 interact to clamp the outer edge of sheet metal parts 2; multiple support mechanisms 5 are provided and located at the bottom of sheet metal parts 2; multiple positioning mechanisms 6 are provided and abut against the outer edge side of sheet metal parts 2.

[0021] This utility model uses an upper clamping mechanism 3 and a lower clamping mechanism 4 to clamp the outer edge of the sheet metal part 2, a support mechanism 5 to support the bottom, and a positioning mechanism 6 to limit the installation position, forming multi-directional constraints. Through the coordinated action of each mechanism, it achieves precise positioning and firm clamping of the sheet metal part 2, providing stable workpiece clamping conditions for high-precision machining of CNC machine tools, and ensuring that the dimensional accuracy and geometric tolerances of the machined surface meet the requirements.

[0022] Furthermore, in another embodiment, the upper clamping mechanism 3 includes a first hydraulic cylinder 31, a pressure block 32, a fixing block 33, and a connecting rod 34; the first hydraulic cylinder 31 is installed inside the base 1, the extension end of the first hydraulic cylinder 31 is rotatably connected to the pressure block 32, the middle part of the pressure block 32 is rotatably connected to one end of the connecting rod 34, and the other end of the connecting rod 34 is rotatably connected to the fixing block 33; a pressing part 321 is provided on the side of the pressure block 32 away from the extension end of the first hydraulic cylinder 31, or a pressing rod 35 fixedly connected to the pressure block 32 is provided on the side of the pressure block 32 away from the extension end of the first hydraulic cylinder 31.

[0023] By setting up an upper clamping mechanism 3, the first hydraulic cylinder 31 of the upper clamping mechanism 3 drives the pressure block 32 to move, and the pressure block 32 is rotatably connected to the connecting rod 34, so that the pressure block 32 can adaptively adjust according to the edge shape of the sheet metal part 2 during the clamping process, ensuring that the clamping part 321 or the clamping rod 35 is in close contact with the surface of the part, thereby improving the clamping reliability.

[0024] Furthermore, in another embodiment, the lower clamping mechanism 4 includes a second hydraulic cylinder 41 installed inside the base 1, the telescopic end of the second hydraulic cylinder 41 abutting against the bottom of the outer edge of the sheet metal fitting 2.

[0025] By setting a second hydraulic cylinder 41, the telescopic end of the second hydraulic cylinder 41 abuts against the bottom of the outer edge of the sheet metal part 2, which facilitates the formation of upper and lower clamping forces with the upper clamping mechanism, effectively preventing the part from shifting up and down due to force during processing, and further improving clamping stability.

[0026] Furthermore, in another embodiment, the support mechanism 5 includes a support cylinder 51, the telescopic end of which abuts against the lower surface of the sheet metal part 2.

[0027] By setting the support cylinder 5, the height can be adjusted according to different positions of the sheet metal part 2, thereby providing stable bottom support for the sheet metal part 2 and maintaining the flatness and precision of the machined surface of the sheet metal part 2.

[0028] Furthermore, in another embodiment, the positioning mechanism 6 includes a positioning rod 61 that abuts against the outer edge of the sheet metal part 2, and a connecting block 62 is fixedly connected to the bottom of the positioning rod 61, and the connecting block 62 is fixedly connected to the base 1.

[0029] By setting the positioning rod 61, the installation position of the sheet metal part 2 in the horizontal direction is clearly defined, preventing the sheet metal part 2 from shifting or tilting during clamping, ensuring the consistency between the processing datum of the sheet metal part 2 and the machine tool coordinate system, and improving the accuracy of the processing dimensions.

[0030] Furthermore, in another embodiment, the four corners of the base 1 are respectively fixedly connected with lifting rings 7.

[0031] By setting up lifting ring 7, it is convenient to use lifting tools for handling and installation and debugging on CNC machine tools, reducing the labor intensity of operators and improving the loading and unloading efficiency of fixtures.

[0032] Based on the description and drawings of this utility model, those skilled in the art can easily manufacture or use the high-precision fixture for CNC machine tools of this utility model, and can achieve the positive effects described in this utility model.

[0033] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0034] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A high-precision fixture for CNC machine tools, characterized in that: The device includes a base (1), an upper clamping mechanism (3) and a lower clamping mechanism (4) for clamping the sheet metal part (2), a support mechanism (5) for supporting the sheet metal part (2), and a positioning mechanism (6) for limiting the installation position of the sheet metal part (2). Multiple upper clamping mechanisms (3) and lower clamping mechanisms (4) are provided, and the upper clamping mechanisms (3) and lower clamping mechanisms (4) interact with each other and clamp the outer edge of the sheet metal part (2). Multiple support mechanisms (5) are provided and are located at the bottom of the sheet metal part (2). Multiple positioning mechanisms (6) are provided and abut against the outer edge side of the sheet metal part (2).

2. The high-precision fixture for CNC machine tools according to claim 1, characterized in that: The upper clamping mechanism (3) includes a first hydraulic cylinder (31), a pressure block (32), a fixing block (33), and a connecting rod (34); the first hydraulic cylinder (31) is installed inside the base (1), and the extension end of the first hydraulic cylinder (31) is rotatably connected to the pressure block (32). The middle part of the pressure block (32) is rotatably connected to one end of the connecting rod (34), and the other end of the connecting rod (34) is rotatably connected to the fixing block (33); a pressing part (321) is provided on the side of the pressure block (32) away from the extension end of the first hydraulic cylinder (31), or a pressing rod (35) is fixedly connected to the pressure block (32) on the side of the pressure block (32) away from the extension end of the first hydraulic cylinder (31).

3. The high-precision fixture for CNC machine tools according to claim 1, characterized in that: The lower clamping mechanism (4) includes a second hydraulic cylinder (41) installed inside the base (1), and the telescopic end of the second hydraulic cylinder (41) abuts against the bottom of the outer edge of the sheet metal fitting (2).

4. A high-precision fixture for CNC machine tools according to claim 1, characterized in that: The support mechanism (5) includes a support cylinder (51), the telescopic end of which abuts against the lower surface of the sheet metal part (2).

5. A high-precision fixture for CNC machine tools according to claim 1, characterized in that: The positioning mechanism (6) includes a positioning rod (61) that abuts against the outer edge of the sheet metal part (2). A connecting block (62) is fixedly connected to the bottom of the positioning rod (61), and the connecting block (62) is fixedly connected to the base (1).

6. A high-precision fixture for CNC machine tools according to claim 1, characterized in that: The four corners of the base (1) are respectively fixedly connected with lifting rings (7).

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