Clamping mechanism of large numerical control machine tool

Abstract

The utility model relates to the field of numerically-controlled machine tools, in particular to a clamping mechanism of a large numerically-controlled machine tool, which comprises a numerically-controlled machine tool body, a plurality of supporting units symmetrically arranged on the upper surface of a workbench of the numerically-controlled machine tool body, workpieces supported at the upper ends of the supporting units on the two sides, and a lifting frame arranged on one side, far away from a chuck, of each supporting unit. A clamping mechanism is arranged on a lifting plate of the lifting frame, a large workpiece above can be supported and supported through the arranged supporting unit in cooperation with a first rolling wheel and a second rolling wheel, the height of the supporting frame can be adjusted through a screw rod on a mounting plate, and therefore workpieces with different diameters can be supported and supported; the supporting frame is more stable through the sizing block at the bottom, the pressing wheel of the clamping mechanism on one side can be pressed on the inner wall of the end, away from the chuck, of the workpiece, and therefore the supporting unit and the chuck are matched to form the complete clamping mechanism, and the tubular workpiece is more stable during machining.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a clamping mechanism for a large numerical control machine tool. Background Art

[0002] CNC machine tool is the abbreviation of digital control machine tool, which is an automated machine tool equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the CNC device through information carriers. After calculation and processing, the CNC device sends various control signals to control the movement of the machine tool and automatically process the parts according to the shape and size required by the drawing.

[0003] Nowadays, large CNC machine tools are often needed for processing some large workpieces. However, when processing some large aluminum alloy pipes, due to their large size, they are different from small CNC machine tools in processing small workpieces. Small machine tools only need one chuck for clamping, but when clamping such large workpieces, it is not enough to rely solely on a chuck for clamping. Without a good clamping support mechanism at the bottom and tail, its stability during processing cannot be guaranteed. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a clamping mechanism for a large-scale CNC machine tool.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A clamping mechanism for a large CNC machine tool, comprising a CNC machine tool body, a chuck and a workbench of the CNC machine tool body, a workpiece being mounted on the chuck of the CNC machine tool body, a plurality of support units being symmetrically arranged on the upper surface of the workbench of the CNC machine tool body, the upper ends of the support units on both sides supporting the workpiece, a lifting frame being arranged on the side of the support unit away from the chuck, and a clamping mechanism being arranged on the lifting plate of the lifting frame;

[0007] The support unit includes a mounting plate, which is mounted on the upper surface of the workbench of the CNC machine tool body. A support frame is arranged above the mounting plate, and a shim is horizontally placed between the support frame and the mounting plate. The mounting plate is fixed on the workbench using a fixing component.

[0008] In addition, the preferred structure is that installation openings are symmetrically arranged at the ends on both sides of the installation plate body, and fixing components are installed at the installation openings. Screws are symmetrically arranged on the upper surface of the ends on both sides of the installation plate body, and multiple nuts are screwed on the screws. A support frame is movably arranged on the screws.

[0009] In addition, a preferred structure is that a mounting head is provided at the bottom of the side walls on both sides of the support frame body, a second roller is rotatably provided in the middle of the groove at the upper end of the support frame, and a first roller is symmetrically rotatably provided on both sides of the second roller in the groove at the upper end of the support frame.

[0010] In addition, a preferred structure is that the diameter of the first roller body is larger than the diameter of the second roller body, and the first roller body is in contact with the outer wall of the workpiece.

[0011] In addition, a preferred structure is that a through hole is opened on the mounting head, the aperture of the through hole of the mounting head is larger than the outer diameter of the screw rod, the mounting head is movably arranged on the screw rod, and the nut is arranged on the upper and lower sides of the mounting head.

[0012] In addition, a preferred structure is that the clamping mechanism includes an electric telescopic machine, which is arranged on the upper surface of a lifting plate that moves up and down on the lifting frame, and a pressure wheel is fixedly connected to the end of the pushing end of the electric telescopic machine.

[0013] In addition, a preferred structure is that the bottom of the pressure wheel body contacts the inner wall of the workpiece.

[0014] The beneficial effects of the utility model are as follows: by setting up the support unit, the first roller and the second roller can be used to support and drag the large workpiece above, and the height of the support frame can be adjusted by the screw on the mounting plate, so that workpieces of different diameters can be supported and dragged, and the shim at the bottom makes the support frame more stable, and the pressure wheel of the clamping mechanism on one side can be pressed on the inner wall of the workpiece away from the end of the chuck, thereby forming a complete clamping mechanism in cooperation with the support unit and the chuck, so that the tubular workpiece is more stable during processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a CNC machine tool with a workpiece clamped;

[0016] Figure 2 It is a structural schematic diagram of a CNC machine tool without a workpiece clamped thereon;

[0017] Figure 3 is a structural schematic diagram of a support unit;

[0018] Figure 4 It is a structural schematic diagram of the mounting plate;

[0019] Figure 5 is a structural schematic diagram of the support frame;

[0020] Figure 6 It is a structural schematic diagram of the clamping mechanism.

[0021] In the figure: 1 CNC machine tool body, 2 workpiece, 3 support unit, 31 support frame, 311 first roller, 312 second roller, 313 mounting head, 32 mounting plate, 321 screw, 322 nut, 323 mounting port, 4 fixing component, 5 lifting frame, 6 clamping mechanism, 61 electric telescopic machine, 62 pressure wheel, 7 shim. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-6 A clamping mechanism for a large CNC machine tool comprises a CNC machine tool body 1, a chuck and a workbench of the CNC machine tool body 1, a workpiece 2 is mounted on the chuck of the CNC machine tool body 1, a plurality of support units 3 are symmetrically arranged on the upper surface of the workbench of the CNC machine tool body 1, the upper ends of the support units 3 on both sides support the workpiece 2, a lifting frame 5 is arranged on the side of the support unit 3 away from the chuck, and a clamping mechanism 6 is arranged on the lifting plate of the lifting frame 5;

[0024] The support unit 3 includes a mounting plate 32, which is mounted on the upper surface of the workbench of the CNC machine tool body 1. A support frame 31 is arranged above the mounting plate 32, and a washer 7 is horizontally placed between the support frame 31 and the mounting plate 32. The mounting plate 32 is fixed on the workbench using a fixing component 4.

[0025] Among them, mounting openings 323 are symmetrically arranged at the ends on both sides of the mounting plate 32, and fixing components 4 are installed at the mounting openings 323. Screws 321 are symmetrically arranged on the upper surface of the ends on both sides of the mounting plate 32, and multiple nuts 322 are screwed on the screws 321. A support frame 31 is movably arranged on the screws 321. The mounting plate 32 is detachable and can be removed at any time by removing the fixing components 4 to change its position on the workbench.

[0026] In addition, mounting heads 313 are provided at the bottom of the side walls on both sides of the support frame 31, a second roller 312 is rotatably provided in the middle of the groove at the upper end of the support frame 31, and first rollers 311 are symmetrically rotatably provided on both sides of the second roller 312 in the groove at the upper end of the support frame 31. The first roller 311 can not only support the workpiece 2, but also rotate synchronously with the rotation of the workpiece 2.

[0027] The diameter of the first roller 311 is larger than that of the second roller 312 . The first roller 311 contacts the outer wall of the workpiece 2 , and the second roller 312 facilitates the support of workpieces 2 with smaller diameters.

[0028] In addition, a through hole is opened on the mounting head 313 , the aperture of the through hole of the mounting head 313 is larger than the outer diameter of the screw rod 321 , the mounting head 313 is movably arranged on the screw rod 321 , and the nut 322 is arranged on the upper and lower sides of the mounting head 313 .

[0029] In addition, the clamping mechanism 6 includes an electric telescopic machine 61, which is arranged on the upper surface of a lifting plate that moves up and down on the lifting frame 5. A pressure wheel 62 is fixedly connected to the end of the pushing end of the electric telescopic machine 61. The bottom of the pressure wheel 62 is in contact with the inner wall of the workpiece 2. The pressure wheel 62 is easy to press on the inner wall of the pipe workpiece 2, and cooperates with the chuck and the bottom support frame 31 to form a complete clamping mechanism.

[0030] In this embodiment, when a large-scale CNC machine tool body 1 is used to process such a large pipe workpiece 2, and such workpiece 2 is an aluminum alloy pipe, the processed end of the workpiece 2 is clamped on the chuck of the CNC machine tool body 1. The workpiece 2 in the figure is a workpiece 2 with the maximum diameter that can be clamped. First, when clamping it on the chuck, the workpiece 2 is lifted and the support unit 3 at the bottom is adjusted.

[0031] First, loosen the nuts 322 on both sides on the screw rod 321 so that the middle mounting head 313 can move, thereby adjusting the height of the support frame 31, so that the first roller 311 can contact the outer wall surface of the workpiece 2, and by padding the bottom with a washer 7 of appropriate thickness, the support frame 31 can be lifted up synchronously, and then tighten the nuts 322 on both sides on the mounting head 313 to install and fix the support frame 31, and cooperate with the washer 7 at the bottom to make the upper support frame 31 installed more stably and firmly.

[0032] When the workpiece 2 is clamped on the chuck, the lifting frame 5 can be driven to lift and lower, and the electric telescopic machine 61 can be moved to a certain height. Then the telescopic push rod of the electric telescopic machine 61 pushes out the pressure wheel 62, so that the pressure wheel 62 can be pushed into the inner wall cavity of the workpiece 2, and then the lifting frame 5 is driven to descend, so that the pressure wheel 62 can press the inner wall of the workpiece 2, thereby cooperating with the support unit 3 and the chuck to form a complete clamping unit. The lifting frame 5 is a liftable device, which is a prior art and is well known to people in the lifting field. There is no need to elaborate on its structural principle.

[0033] In the utility model, by setting up the support unit 3, the first roller 311 and the second roller 312 can be used to support and drag the large workpiece 2 above, and the height of the support frame 31 can be adjusted by the screw 321 on the mounting plate 32, so that workpieces 2 of different diameters can be supported and dragged, and the shim 7 at the bottom makes the support frame 31 more stable, and the pressure wheel 62 of the clamping mechanism 6 on one side can be pressed on the inner wall of the workpiece 2 away from the end of the chuck, thereby cooperating with the support unit 3 and the chuck to form a complete clamping mechanism, so that the tubular workpiece 2 is more stable during processing.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A clamping mechanism for a large CNC machine tool, comprising a CNC machine tool body (1), a chuck of the CNC machine tool body (1) and a workbench, characterized in that: A workpiece (2) is mounted on the chuck of the CNC machine tool body (1); a plurality of support units (3) are symmetrically arranged on the upper surface of the worktable of the CNC machine tool body (1); the workpiece (2) is supported on the upper ends of the support units (3) on both sides; a lifting frame (5) is arranged on the side of the support unit (3) away from the chuck; and a clamping mechanism (6) is arranged on the lifting plate of the lifting frame (5); The support unit (3) comprises a mounting plate (32), the mounting plate (32) being mounted on the upper surface of a workbench of a numerically controlled machine tool body (1), a support frame (31) being arranged above the mounting plate (32), and a washer (7) being horizontally placed between the support frame (31) and the mounting plate (32), and the mounting plate (32) being mounted and fixed on the workbench using a fixing component (4).

2. The clamping mechanism of a large CNC machine tool according to claim 1, characterized in that: The mounting plate (32) is symmetrically provided with mounting openings (323) at the ends on both sides of the plate body, and the fixing components (4) are installed at the mounting openings (323). Screw rods (321) are symmetrically provided at the upper surfaces of the ends on both sides of the plate body of the mounting plate (32), and a plurality of nuts (322) are screwed onto the screw rods (321), and a support frame (31) is movably provided on the screw rods (321).

3. The clamping mechanism for a large CNC machine tool according to claim 2, characterized in that: The bottom of the side walls on both sides of the support frame (31) are provided with mounting heads (313), a second roller (312) is rotatably provided in the middle of the groove at the upper end of the support frame (31), and first rollers (311) are symmetrically rotatably provided on both sides of the second roller (312) in the groove at the upper end of the support frame (31).

4. The clamping mechanism for a large CNC machine tool according to claim 3, characterized in that: The wheel body diameter of the first roller (311) is greater than the wheel body diameter of the second roller (312), and the wheel body of the first roller (311) is in contact with the outer wall of the workpiece (2).

5. The clamping mechanism for a large CNC machine tool according to claim 3, characterized in that: The mounting head (313) is provided with a through hole, the diameter of the through hole of the mounting head (313) is larger than the outer diameter of the screw rod (321), the mounting head (313) is movably arranged on the screw rod (321), and the nut (322) is arranged on the upper and lower sides of the mounting head (313).

6. The clamping mechanism for a large CNC machine tool according to claim 1, characterized in that: The clamping mechanism (6) comprises an electric telescopic machine (61), which is arranged on the upper surface of a lifting plate that moves up and down on the lifting frame (5), and a pressure wheel (62) is fixedly connected to the end of the pushing end of the electric telescopic machine (61).

7. The clamping mechanism for a large CNC machine tool according to claim 6, characterized in that: The bottom of the wheel body of the pressure wheel (62) contacts the inner wall of the workpiece (2).

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