A special-shaped parts fixture for CNC machine tools

Abstract

The utility model discloses a special-shaped part clamp tooling for a numerically controlled machine tool, and relates to the technical field of machine tool clamps, comprising a base, wherein the inner side of the base is rotatably connected with a forward and reverse lead screw, the upper surface of the threaded sleeve is movably connected with a swing arm at a fixed point, the outer surface of the swing arm is slidably connected with a first sliding block, the outer surface of the first sliding block is movably connected with a clamping claw at a fixed point, the outer surface of the base is fixedly installed with a motor, the output shaft of the motor is fixedly connected to one end of the forward and reverse lead screw, through the cooperation between the forward and reverse lead screw, the threaded sleeve, the swing arm and the clamping claw, the rotation of the forward and reverse lead screw can drive the threaded sleeve to move the position, the threaded sleeve enables the swing arm to have a swing function to adapt to the appearance of the special-shaped workpiece, the clamping claw is driven to move the position by the swing of the swing arm, after the clamping claw at one end of the swing arm contacts the special-shaped workpiece, the clamping claw at the other end is driven to continue to move by the swing of the swing arm until it contacts the special-shaped workpiece, thereby solving the problem that the special-shaped workpiece cannot be clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool fixtures, in particular to a special-shaped part fixture tooling for numerically controlled machine tools. Background Art

[0002] A fixture is a tool used to fix the workpiece during the mechanical manufacturing process, so that the workpiece can be fixed for easy processing. The types of fixtures can be roughly divided into welding fixtures, inspection fixtures, assembly fixtures, machine tool fixtures, etc., among which machine tool fixtures are the most common. The fixture is usually composed of positioning elements, clamping devices, etc. The fixture plays an important role in mechanical processing, which is beneficial to ensure the processing accuracy of the workpiece, improve product quality, increase productivity and reduce costs. Suitable fixtures are crucial to improving processing efficiency and ensuring processing quality.

[0003] When processing, the existing CNC machine tools generally need to place the processed parts in the fixture for locking and fixing, and then cut them. However, when clamping and fixing special-shaped workpieces, due to the irregular appearance of the special-shaped workpieces, the claws in the existing fixture cannot move synchronously when tightening inward, and cannot clamp the special-shaped workpiece, which is inconvenient to process the workpiece. For this reason, we provide a special-shaped workpiece fixture tooling for CNC machine tools to solve the above problems. Utility Model Content

[0004] 1) Technical issues solved

[0005] The utility model aims to make up for the deficiencies of the prior art and provides a special-shaped part fixture tooling for a numerically controlled machine tool.

[0006] 2) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a special-shaped parts fixture tooling for CNC machine tools, comprising a base, the inner side of the base is rotatably connected with a forward and reverse screw, the outer surface of the forward and reverse screw is threadedly connected with a threaded sleeve, the upper surface of the threaded sleeve is movably connected with a swing arm at a fixed point, the outer surface of the swing arm is slidably connected with a first slider, the outer surface of the first slider is movably connected with a clamping claw at a fixed point, a positioning mechanism is arranged inside the first slider, a motor is fixedly mounted on the outer surface of the base, and the output shaft of the motor is fixedly connected to one end of the forward and reverse screw.

[0008] Furthermore, the positioning mechanism includes a sleeve, the inner wall of the sleeve is slidably connected to a guide rod, one end of the guide rod is fixedly connected to a rotating wheel, one end of the guide rod located inside the first slider is fixedly movably connected to a pressure plate, and the outer surface of the pressure plate is slidably connected to the inner wall of the first slider.

[0009] Furthermore, a spring is sleeved on the outside of the guide rod, one end of the spring is fixedly connected to the inner wall of the first sliding block, and the other end of the spring is fixedly connected to the upper surface of the pressure plate.

[0010] Furthermore, a guide groove is provided on the inner side of the sleeve, a sliding rod is fixedly connected to the outer surface of the guide rod, and the outer surface of the sliding rod is slidably connected to the inner wall of the guide groove.

[0011] Furthermore, the inner wall of the base is fixedly connected to a guide rail, the outer surface of the guide rail is slidably connected to a second slider, the upper surface of the second slider is movably connected to a third slider at a fixed point, and the inner wall of the third slider is slidably connected to the outer surface of the swing arm.

[0012] Furthermore, two tension springs are movably connected through the outer surface of the clamp, and the other end of the tension spring is movably connected through the outer surface of the first sliding block.

[0013] Furthermore, a placing platform is fixedly connected to the inner wall of the base, and a mounting seat is fixedly connected to the outer surface of the base.

[0014] III) Beneficial effects

[0015] Compared with the prior art, the special-shaped parts fixture tooling for CNC machine tools has the following beneficial effects:

[0016] 1. The utility model cooperates between the forward and reverse screws, the threaded sleeve, the swing arm and the clamping jaws. The rotation of the forward and reverse screws can drive the threaded sleeve to move the position, the threaded sleeve can drive the swing arms on both sides to retract inward, the swing arm drives the clamping jaws to move and contact the special-shaped workpiece, the threaded sleeve enables the swing arm to have a swing function to adapt to the appearance of the special-shaped workpiece, the swing arm swings to drive the clamping jaws to move the position, after the clamping jaw at one end of the swing arm contacts the special-shaped workpiece, the swing arm swings to drive the clamping jaw at the other end to continue to move until it contacts the special-shaped workpiece, thereby solving the problem that the special-shaped workpiece cannot be clamped.

[0017] 2. The utility model cooperates between the guide rod, the pressure plate and the guide groove. The guide groove can guide the slide bar to slide upward. After the slide bar slides upward, it drives the guide rod to move upward. The guide rod drives the pressure plate to break away from the contact with the swing arm, thereby releasing the positioning of the first slide block. The first slide block can change its position under the push of external force to adapt to special-shaped workpieces of different specifications and sizes, thereby further increasing the clamping function of the special-shaped workpiece fixture of the CNC machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the main components of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the first slider of the utility model;

[0021] Figure 4 It is a schematic diagram of the overall three-dimensional structure of the guide rail of the utility model.

[0022] In the figure: 1. base; 2. threaded sleeve; 3. swing arm; 4. first slider; 5. clamping claw; 6. positioning mechanism; 601. sleeve; 602. guide rod; 603. rotating wheel; 604. pressure plate; 605. spring; 606. guide groove; 607. slide bar; 7. motor; 8. guide rail; 9. second slider; 10. third slider; 11. tension spring; 12. placement table; 13. mounting seat; 14. forward and reverse screws. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-Figure 4 As shown, the utility model provides a technical solution: a special-shaped part fixture tooling for a CNC machine tool, comprising a base 1, the inner wall of the base 1 is fixedly connected to a placing table 12, the outer surface of the base 1 is fixedly connected to a mounting seat 13, the workpiece is supported by the placing table 12, and is connected and installed with the machine tool through the mounting seat 13, the inner side of the base 1 is rotatably connected to a positive and negative lead screw 14, the outer surface of the positive and negative lead screw 14 is threadedly connected to a threaded sleeve 2, the threaded sleeve 2 is driven to move by the rotation of the positive and negative lead screw 14, the upper surface of the threaded sleeve 2 is movably connected to a swing arm 3 at a fixed point, the swing arm 3 is driven to move by moving the threaded sleeve 2, and the outer surface of the swing arm 3 is slidably connected to a first slider 4. The outer surface of the first slider 4 is movably connected with a clamping claw 5 at a fixed point. The first slider 4 is made to have a sliding function through the swing arm 3. The sliding of the first slider 4 can drive the clamping claw 5 to move its position so as to adapt to special-shaped workpieces of different specifications and sizes. The slide groove provided on the inner side of the swing arm 3 can increase the stability of the first slider 4 when sliding. The outer surface of the base 1 is fixedly installed with a motor 7. The output shaft of the motor 7 is fixedly connected to one end of the forward and reverse screw 14. The motor 7 can provide power for the rotation of the forward and reverse screw 14. The threaded sleeve 2 enables the swing arm 3 to have a swinging function. The swing of the swing arm 3 drives the clamping claw 5 to move its position so as to adapt to the appearance of the special-shaped workpiece and facilitate the clamping of the special-shaped workpiece.

[0025] A positioning mechanism 6 is provided inside the first slider 4, and the positioning mechanism 6 can control the movement of the first slider 4. The positioning mechanism 6 includes a sleeve 601, and the inner wall of the sleeve 601 is slidably connected to a guide rod 602, and one end of the guide rod 602 is fixedly connected to a rotating wheel 603. One end of the guide rod 602 located inside the first slider 4 is movably connected to a pressure plate 604 at a fixed point, and the outer surface of the pressure plate 604 is slidably connected to the inner wall of the first slider 4. The sleeve 601 can increase the stability of the guide rod 602 when sliding, and the guide rod 602 is driven to rotate by the rotating wheel 603. A spring 605 is sleeved on the outside of the guide rod 602, and one end of the spring 605 is fixedly connected to the inner wall of the first slider 4, and the other end of the spring 605 is fixedly connected to the upper surface of the pressure plate 604. The spring 605 is supported by the first slider 4, and the spring 605 can push the pressure plate 604 to make close contact with the swing arm 3 to limit the movement of the first slider 4. A guide groove 606 is provided on the inner side of the sleeve 601, and a slide bar 607 is fixedly connected to the outer surface of the guide rod 602. The outer surface of the slide bar 607 is slidably connected to the inner wall of the guide groove 606. The guide groove 606 has an upwardly inclined angle, and the slide bar 607 can be guided to slide upward through the guide groove 606. When the guide rod 602 slides upward, it drives the slide bar 607 to slide upward. At the same time, the slide bar 607 drives the pressure plate 604 to break away from the contact with the swing arm 3, thereby releasing the positioning of the first slider 4. The first slider 4 can change its position under the push of external force to adapt to special-shaped workpieces of different specifications and sizes.

[0026] The inner wall of the base 1 is fixedly connected with a guide rail 8, and the outer surface of the guide rail 8 is slidably connected with a second slider 9. The upper surface of the second slider 9 is movably connected with a third slider 10 at a fixed point. The inner wall of the third slider 10 is slidably connected with the outer surface of the swing arm 3. In order to prevent the swing arm 3 from having insufficient supporting force when driving the clamping jaw 5 to clamp the workpiece, the second slider 9 is guided and supported by the guide rail 8 to increase the stability of the second slider 9. When the swing arm 3 moves, the third slider 10 can be driven to move its position, and the third slider 10 is supported by the second slider 9 to ensure stability of the third slider 10. The third slider 10 can provide a more stable support for the swing arm 3. Two tension springs 11 are movably connected through the outer surface of the clamping jaw 5, and the other end of the tension spring 11 is movably connected through the outer surface of the first slider 4. After the clamping jaw 5 clamps the workpiece, in order to prevent the clamping jaw 5 from being unable to reset, the clamping jaw 5 is pulled and reset by the tension spring 11, which is convenient for the next clamping operation of the workpiece.

[0027] Working principle: When in use, it is first connected to the CNC machine tool through the mounting seat 13, and then the special-shaped workpiece is placed on the placement table 12, and then the guide rod 602 is driven to rotate by the rotating wheel 603. While the guide rod 602 rotates, the slide rod 607 is guided to move upward through the guide groove 606, and at the same time, the guide rod 602 drives the pressure plate 604 to move upward, breaking away from the contact with the swing arm 3, and pushing the first slider 4 to drive the clamping jaw 5 to move position to use the specifications of the special-shaped workpiece. While the pressure plate 604 moves upward, the spring 605 is compressed to provide power for the reset of the pressure plate 604, and then the motor 7 is started to rotate, and the motor 7 drives the forward and reverse screws 14 to rotate. After the forward and reverse screws 14 rotate, they drive the threaded sleeve 2 to move position, the threaded sleeve 2 drives the swing arm 3 to move, and the swing arm 3 drives the clamping jaw 5 to move, and then the clamping jaw 5 contacts the special-shaped workpiece and clamps it.

Claims

1. A fixture for special-shaped parts used in CNC machine tools, comprising a base (1), characterized in that: The inner side of the base (1) is rotatably connected to a forward and reverse lead screw (14); the outer surface of the forward and reverse lead screw (14) is threadedly connected to a threaded sleeve (2); the upper surface of the threaded sleeve (2) is movably connected to a swing arm (3); the outer surface of the swing arm (3) is slidably connected to a first slider (4); the outer surface of the first slider (4) is movably connected to a clamping claw (5); a positioning mechanism (6) is provided inside the first slider (4); a motor (7) is fixedly mounted on the outer surface of the base (1); and the output shaft of the motor (7) is fixedly connected to one end of the forward and reverse lead screw (14).

2. The special-shaped parts fixture for CNC machine tools according to claim 1, characterized in that: The positioning mechanism (6) comprises a sleeve (601), the inner wall of the sleeve (601) is slidably connected to a guide rod (602), one end of the guide rod (602) is fixedly connected to a rotating wheel (603), one end of the guide rod (602) located inside the first sliding block (4) is movably connected to a pressure plate (604) at a fixed point, and the outer surface of the pressure plate (604) is slidably connected to the inner wall of the first sliding block (4).

3. The special-shaped parts fixture for CNC machine tools according to claim 2, characterized in that: A spring (605) is sleeved on the outside of the guide rod (602), one end of the spring (605) is fixedly connected to the inner wall of the first sliding block (4), and the other end of the spring (605) is fixedly connected to the upper surface of the pressing plate (604).

4. The special-shaped parts fixture for CNC machine tools according to claim 3, characterized in that: A guide groove (606) is provided on the inner side of the sleeve (601), a sliding rod (607) is fixedly connected to the outer surface of the guide rod (602), and the outer surface of the sliding rod (607) is slidably connected to the inner wall of the guide groove (606).

5. The special-shaped parts fixture for CNC machine tools according to claim 1, characterized in that: The inner wall of the base (1) is fixedly connected to a guide rail (8), the outer surface of the guide rail (8) is slidably connected to a second slider (9), the upper surface of the second slider (9) is movably connected to a third slider (10) at a fixed point, and the inner wall of the third slider (10) is slidably connected to the outer surface of the swing arm (3).

6. The special-shaped parts fixture for CNC machine tools according to claim 1, characterized in that: Two tension springs (11) are movably connected through the outer surface of the clamping jaw (5), and the other end of the tension spring (11) is movably connected through the outer surface of the first sliding block (4).

7. The special-shaped parts fixture for CNC machine tools according to claim 1, characterized in that: The inner wall of the base (1) is fixedly connected to a placement platform (12), and the outer surface of the base (1) is fixedly connected to a mounting seat (13).

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