Adjustable fixture for numerical control machine tool

Abstract

The utility model discloses a kind of adjustable numerical control machine tool clamps, belong to clamp design field, including slide bar, still include operating assembly, slidingly connected in slide bar;Hydraulic assembly is fixedly connected on operating assembly;Compression assembly is fixedly connected on hydraulic assembly;The operating assembly, including telescopic bed slidingly connected in slide bar, motor fixedly connected on telescopic bed, operating platform fixedly connected on telescopic bed, protective cover fixedly connected on telescopic bed.The utility model provides equal pressure by two sides symmetrical oil passage in hydraulic assembly, because Pascal principle, so that the compression assembly driven by hydraulic assembly can automatically stretch out and act on workpiece forward, so that even shape is different, workpiece surface can obtain same and uniform pressure, it is beneficial to the overall stress of workpiece in processing process, avoid the possibility of stress unevenness to cause tiny damage.

Description

Technical Field

[0001] This utility model relates to the field of fixture design technology, specifically an adjustable CNC machine tool fixture. Background Technology

[0002] CNC machine tools are important tools in modern industrial production, playing a core role in mass production on assembly lines. In CNC machine tools, fixtures, as tools for holding workpieces, need to provide stable and secure support for the workpieces and mechanical support under various operations such as turning, milling, and drilling. Therefore, the importance of fixtures is self-evident. Nowadays, fixtures are developing very rapidly. However, due to the complexity of workpieces, fixtures continue to evolve and become more and more diverse to adapt to different workpieces.

[0003] An investigation revealed that a Chinese utility model patent (publication number: CN208342318U) discloses an adjustable CNC machine tool fixture, comprising a worktable. The worktable has symmetrically arranged sliding grooves on its top, and two second sliders are slidably connected to each of the two I-shaped sliding plates. The piston rod of a first cylinder passes through the inner wall of the sliding groove and is connected to the first slider. L-shaped plates are welded to the inner sidewalls of the four second sliders. A third cylinder is located at the top of the horizontal plate, and the piston rod of the third cylinder passes through the horizontal plate. A clamping block is located at the lower end of the piston rod of the third cylinder, and the piston rods of the second cylinders are connected to the sidewalls of the second sliders. This adjustable CNC machine tool fixture allows the first slider to move left and right within the sliding groove by activating the first cylinder according to the length of the workpiece. This changes the distance between the two I-shaped sliding plates, thereby changing the distance between the two L-shaped plates on the left and right ends. By changing the distance between the left and right L-shaped plates, workpieces of different lengths can be placed.

[0004] In existing technologies, workpieces are fixed and rotary turning operations are performed by clamping them with clamping blocks and rotating the worktable. However, due to the complexity of the workpieces, a single clamping method cannot effectively hold them, and clamping the workpieces can cause excessive local stress, resulting in minor metal damage and posing hidden risks.

[0005] Therefore, this utility model provides an adjustable fixture for CNC machine tools to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This invention provides an adjustable fixture for CNC machine tools, aiming to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: an adjustable CNC machine tool fixture, including a slide rod, an operating component slidably connected to the slide rod, a hydraulic component fixedly connected to the operating component, and a clamping component fixedly connected to the hydraulic component;

[0010] The operating components include a telescopic bed slidably connected to a slide rod, a motor fixedly connected to the telescopic bed, an operating table fixedly connected to the telescopic bed, and a protective cover fixedly connected to the telescopic bed.

[0011] As a preferred technical solution of this application, the hydraulic assembly includes a loading plate fixedly connected to the operating table, a support frame fixedly connected to the loading plate, an oil passage opened on the support frame, a plug fixedly connected to the end of the support frame, a primary hydraulic cylinder fixedly connected to the support frame, and a primary shaft shoulder fixedly connected to the end of the primary hydraulic cylinder.

[0012] As a preferred technical solution of this application, the hydraulic assembly includes a secondary hydraulic cylinder slidably connected within a primary hydraulic cylinder, a secondary shoulder fixedly connected to one end of the secondary hydraulic cylinder, a tertiary shoulder fixedly connected to the other end of the secondary hydraulic cylinder, a tertiary piston slidably connected within the secondary hydraulic cylinder, and a quaternary shoulder fixedly connected to one end of the tertiary piston.

[0013] As a preferred technical solution of this application, the hydraulic component includes an oil pipe fixedly connected to an oil passage and a solenoid valve fixedly connected to the oil pipe.

[0014] As a preferred technical solution of this application, the clamping assembly includes a fixed block fixedly connected to the three-stage piston, a screw hole opened in the middle of the fixed block, a shock-absorbing block fixedly connected to the fixed block, and a vertical hole opened in the shock-absorbing block.

[0015] As a preferred technical solution of this application, the hydraulic component is mirror-symmetrical on both sides, and the pressure in the oil passages on both sides is equal.

[0016] (III) Beneficial Effects

[0017] This invention provides equal pressure through symmetrical oil passages on both sides of the hydraulic assembly. Due to Pascal's principle, the clamping assembly driven by the hydraulic assembly will automatically extend forward and act on the workpiece, so that even if the workpiece surface has different shapes, it can obtain the same and uniform pressure. This is beneficial for the workpiece to be subjected to overall force during processing and avoids the possibility of minor damage caused by uneven stress due to local force. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2This is a separate diagram of the hydraulic components and clamping components of this utility model;

[0020] Figure 3 This is a structural diagram of the hydraulic and clamping components of this utility model;

[0021] Figure 4 This is a half-sectional view of the hydraulic and clamping components of this utility model.

[0022] In the diagram: 1. Operating components; 11. Telescopic bed; 12. Motor; 13. Operating table; 14. Protective cover; 2. Hydraulic components; 21. Loading tray; 22. Support frame; 23. Oil passage; 24. Plug; 25. First-stage hydraulic cylinder; 26. First-stage shoulder; 27. Second-stage hydraulic cylinder; 28. Second-stage shoulder; 29. ​​Third-stage shoulder; 210. Third-stage piston; 211. Fourth-stage shoulder; 212. Oil pipe; 213. Solenoid valve; 3. Clamping components; 31. Fixing block; 32. Screw hole; 33. Shock absorber block; 34. Vertical hole; 4. Slide rod. Detailed Implementation

[0023] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides an adjustable fixture for CNC machine tools, such as... Figure 1-4 As shown, it includes a slide bar, an operating component 1 slidably connected to the slide bar 4; a hydraulic component 2 fixedly connected to the operating component 1; and a clamping component 3 fixedly connected to the hydraulic component 2.

[0025] The operating component 1 includes a telescopic bed 11 slidably connected to the slide rod 4, a motor 12 fixedly connected to the telescopic bed 11, an operating table 13 fixedly connected to the telescopic bed 11, and a protective cover 14 fixedly connected to the telescopic bed 11.

[0026] The hydraulic assembly 2 includes a loading plate 21 fixedly connected to the operating table 13, a support frame 22 fixedly connected to the loading plate 21, an oil passage 23 opened on the support frame 22, a plug 24 fixedly connected to the end of the support frame 22, a primary hydraulic cylinder 25 fixedly connected to the support frame 22, and a primary shoulder 26 fixedly connected to the end of the primary hydraulic cylinder 25.

[0027] The hydraulic assembly 2 includes a secondary hydraulic cylinder 27 slidably connected within a primary hydraulic cylinder 25, a secondary shoulder 28 fixedly connected to one end of the secondary hydraulic cylinder 27, a tertiary shoulder 29 fixedly connected to the other end of the secondary hydraulic cylinder 27, a tertiary piston 210 slidably connected within the secondary hydraulic cylinder 27, and a quaternary shoulder 211 fixedly connected to one end of the tertiary piston 210.

[0028] The hydraulic assembly 2 includes an oil pipe 212 fixedly connected to the oil passage 23, and a solenoid valve 213 fixedly connected to the oil pipe 212.

[0029] The clamping assembly 3 includes a fixing block 31 fixedly connected to the three-stage piston 210, a screw hole 32 opened in the middle of the fixing block 31, a shock-absorbing block 33 fixedly connected to the fixing block 31, and a vertical hole 34 opened in the shock-absorbing block 33.

[0030] The hydraulic component 2 is mirror-symmetrical on both sides, and the pressure inside the oil passages 23 on both sides is equal.

[0031] Specifically, in CNC machine tools, the importance of fixtures is self-evident. The operating component 1 can slide on the slide bar. Specifically, the telescopic bed 11 slides on the slide bar, the motor 12 controls the movement of the operating table 13, and the protective cover 14 prevents iron filings from falling into the moving parts. The oil pipe 212 is filled with pressurized hydraulic oil. When the solenoid valve 213 is open, the oil enters the oil passage 23 through the oil pipe 212. Under the action of the plug 24, pressure is generated on the inner wall of the oil passage 23.

[0032] The workpiece is placed on the loading plate 21 and needs to be clamped. After the first-stage hydraulic cylinder 25 fixed on the support frame 22 generates pressure in the oil passage 23, due to Pascal's principle, the pressure inside the first-stage hydraulic cylinder 25 begins to increase and gradually pushes the second-stage hydraulic cylinder 27 forward. Due to the interference between the first-stage shoulder 26 and the second-stage shoulder 28, the pressure inside the second-stage hydraulic cylinder 27 gradually increases and pushes the third-stage piston 210 forward. Under the interference between the third-stage shoulder 29 and the fourth-stage shoulder 211, the third-stage piston 210 reaches its limit position.

[0033] The end of the three-stage piston 210 is screwed to the fixed block 31 through the screw hole 32. The other side of the fixed block 31 is fixedly connected to the shock absorber 33, which is made of rubber and can protect the surface of the workpiece from damage. The shock absorber 33 has vertical holes 34, which can improve the softness of the shock absorber 33 and increase the friction with the workpiece.

[0034] Due to Pascal's principle, all the primary hydraulic cylinders 25, secondary hydraulic cylinders 27, and tertiary pistons 210 connected by oil passages 23 and oil pipes 212 have equal internal pressure. When the tertiary piston 210 touches the workpiece surface, it encounters resistance and stops moving. If the damping blocks 33 on the other tertiary pistons 210 do not touch the workpiece, it will continue to move forward until all the damping blocks 33 on the tertiary pistons 210 touch the workpiece surface. Then, the hydraulic pressure continues to rise until the workpiece is pressed tightly. At this time, the solenoid valve 213 closes, pressure is maintained, and the CNC lathe operation begins.

[0035] With this fixing method, the workpiece surface can be fixed even if there are multiple surfaces. Furthermore, since there are more fixed surfaces than in the traditional method, there is no stress concentration area on a single fixed surface, which is more work-friendly.

[0036] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An adjustable fixture for a CNC machine tool, comprising a slide bar (4), characterized in that: It also includes an operating component (1), which is slidably connected to the slide rod (4); a hydraulic component (2), which is fixedly connected to the operating component (1); and a clamping component (3), which is fixedly connected to the hydraulic component (2). The operating component (1) includes a telescopic bed (11) slidably connected to a slide bar (4), a motor (12) fixedly connected to the telescopic bed (11), an operating table (13) fixedly connected to the telescopic bed (11), and a protective cover (14) fixedly connected to the telescopic bed (11).

2. The adjustable CNC machine tool fixture according to claim 1, characterized in that: The hydraulic assembly (2) includes a loading plate (21) fixedly connected to the operating table (13), a support frame (22) fixedly connected to the loading plate (21), an oil passage (23) opened on the support frame (22), a plug (24) fixedly connected to the end of the support frame (22), a primary hydraulic cylinder (25) fixedly connected to the support frame (22), and a primary shoulder (26) fixedly connected to the end of the primary hydraulic cylinder (25).

3. The adjustable CNC machine tool fixture according to claim 2, characterized in that: The hydraulic assembly (2) includes a secondary hydraulic cylinder (27) slidably connected within a primary hydraulic cylinder (25), a secondary shoulder (28) fixedly connected to one end of the secondary hydraulic cylinder (27), a tertiary shoulder (29) fixedly connected to the other end of the secondary hydraulic cylinder (27), a tertiary piston (210) slidably connected within the secondary hydraulic cylinder (27), and a quaternary shoulder (211) fixedly connected to one end of the tertiary piston (210).

4. The adjustable CNC machine tool fixture according to claim 3, characterized in that: The hydraulic assembly (2) includes an oil pipe (212) fixedly connected to an oil passage (23) and a solenoid valve (213) fixedly connected to the oil pipe (212).

5. The adjustable CNC machine tool fixture according to claim 4, characterized in that: The clamping assembly (3) includes a fixed block (31) fixedly connected to the three-stage piston (210), a screw hole (32) opened in the middle of the fixed block (31), a shock-absorbing block (33) fixedly connected to the fixed block (31), and a vertical hole (34) opened in the shock-absorbing block (33).

6. The adjustable CNC machine tool fixture according to claim 5, characterized in that: The hydraulic component (2) is mirror-symmetrical on both sides, and the pressure in the oil passages (23) on both sides is equal.

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