Clamping and fixing tool for arc arm machining

Abstract

The clamping and fixing tool for arc arm machining comprises a lower installation base, telescopic rods are fixedly arranged on the periphery of the upper end of the lower installation base, an upper installation base is fixedly arranged at the upper ends of the telescopic rods, and an installation disc is rotationally arranged in the middle of the interior of the upper installation base. A first friction pad is arranged on the face, away from the telescopic rod, of the mounting disc in a sliding mode, the first friction pad is arranged to be rectangular, a second friction pad is arranged on one side of the first friction pad, and the second friction pad is fixedly connected with the upper mounting base. According to the clamping and fixing tool for arc arm machining, through cooperation of the installation frame, the air pressure rod, the limiting frame and other assemblies on the periphery of the ejector rod, the device can better adapt to arc arms with different radians, after the device adapts to the arc arms, the air pressure rod can push the ejector rod to the middle, and the clamping and fixing tool can be used for machining the arc arms through extrusion force of the two sides of the ejector rod to the middle. The arc-shaped arm can be further clamped, and deviation of the workpiece is avoided.

Description

Technical Field

[0001] This utility model relates to the field of parts processing technology, specifically a clamping and fixing fixture for arc arm processing. Background Technology

[0002] In patent application CN113695683B, the component includes a main body, a fixing part, a mounting bracket, a cutting part, and a coating part. The main body has two symmetrically formed sliding grooves A, and two symmetrically formed sliding grooves B on its top surface. An auxiliary groove is formed on the top surface of the main body, and a baffle is welded onto the main body. The fixing part consists of a fixing plate, sliding protrusions, locking bolts, and an auxiliary rod A, and the fixing plate has an L-shaped plate structure. Two sliding protrusions are symmetrically welded to the bottom surface of the fixing plate, and the two sliding protrusions are slidably connected to the two sliding grooves B respectively. The workpiece to be processed is held between the fixed plate and the baffle in the moving groove B; a locking bolt is threaded onto the fixed plate, and the locking bolt is aligned with the auxiliary groove, with the head of the locking bolt in close contact with the bottom surface of the inner wall of the auxiliary groove; the mounting frame consists of two sliding arms and a mounting base A, and both sliding arms are welded with protrusions, which are slidably connected in the two sliding grooves A; a mounting base A is fixedly connected to the two sliding arms by bolts; the cutting part consists of a base body, a drive motor and a blade, and the base body is fixedly connected to the mounting base A by bolts. The advantages are as follows: The fixing part allows for the clamping of the workpiece. During clamping, the locking bolt and auxiliary groove prevent damage to the top surface of the main body. Specifically, a locking bolt is threaded onto the fixing plate, aligning with the auxiliary groove and with its head pressed against the bottom of the inner wall of the auxiliary groove. This secures the fixing plate and prevents damage to the top surface of the main body during tightening, thus avoiding uneven sliding of the fixing plate. Without this design, the top surface of the main body would be damaged after tightening the locking bolt, leading to premature replacement and increased maintenance costs by 200-400 yuan.

[0003] In the prior art, including the aforementioned patents, when processing curved robotic arms, common clamping fixtures have few contact points with the robotic arms, which may lead to misalignment during processing. The most effective way for commercially available universal clamps to fix curved robotic arms is by applying downward pressure, which is not suitable for longer workpieces. When using commercially available universal clamps to process extra-long workpieces, it is necessary to stop processing multiple times to adjust the workpiece position, which can easily affect the working efficiency of the device. Utility Model Content

[0004] The purpose of this utility model is to provide a clamping and fixing fixture for arc arm machining, so as to solve the problem mentioned in the background art that it is not convenient to improve the convenience of machining while preventing the robotic arm from deviating during machining.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a clamping and fixing fixture for arc arm machining, comprising a lower mounting base, a telescopic rod fixedly arranged around the upper end of the lower mounting base, an upper mounting base fixedly arranged at the upper end of the telescopic rod, a mounting plate rotatably arranged in the middle of the interior of the upper mounting base, a friction pad I slidably arranged on the side of the mounting plate away from the telescopic rod, the friction pad I being rectangular, a friction pad II being arranged on one side of the friction pad I, the friction pad II being fixedly connected to the upper mounting base, and the parts and layout of the upper mounting base and the lower mounting base being identical and mirror-symmetrical.

[0006] Furthermore, an air chamber is slidably provided in the middle of the mounting plate, one end of the air chamber is fixedly connected to a friction pad, and elastic components are fixedly provided at both ends of the air chamber, with the other end of the elastic components fixedly connected to the lower mounting base and the mounting base.

[0007] Furthermore, a valve core is provided at one end of the air chamber near the mounting plate, and an elastic sealing gasket is provided inside the air chamber. Both ends of the elastic sealing gasket are fixedly connected to the air chamber, and the remaining part of the elastic sealing gasket is slidably connected to the air chamber.

[0008] Furthermore, a mounting bracket is provided below the elastic sealing gasket, and the two ends of the mounting bracket are fixedly connected to the air chamber through brackets. Several mounting blocks are slidably arranged in the middle of the mounting bracket.

[0009] Furthermore, a top rod is slidably provided in the middle of the mounting block, the area of ​​the upper half of the top rod is smaller than the area of ​​the lower half, and pneumatic rods are fixedly provided inside the mounting frame on both sides of the mounting block.

[0010] Furthermore, both ends of the mounting frame are provided with connecting rods, and the other end of the connecting rod is provided with a limiting frame. The connecting rod is rotatably connected to the limiting frame, and the limiting frame is simultaneously slidably connected to the top rod. Inside the limiting frame, on both sides of the top rod, pneumatic rods are also fixedly provided.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the clamping and fixing fixture for arc arm machining is reasonable and has the following advantages:

[0012] (1) With the cooperation of the mounting brackets, pneumatic rods and limit frames around the push rod, after the push rod hits the arc arm, the operator can decide to pressurize or depressurize the air chamber according to the actual clamping situation. In this way, when clamping such arc arms in the future, the clamping can be completed according to the preset situation. The air pressure in the air chamber can also make the device better adapt to arc arms with different curvatures. If multiple mechanical arms with different curvatures are frequently clamped, the air pressure in the air chamber can be adjusted to a suitable value according to the average value of their curvatures. After adapting to the arc arm, the pneumatic rod can push the push rod towards the middle. By using the squeezing force on both sides of the push rod towards the middle, the arc arm can be further clamped to avoid the phenomenon of workpiece deviation during clamping.

[0013] (2) By setting up components such as mounting plate, friction pad one and friction pad two, the mounting plate can be rotated to the approximate position according to the shape of the workpiece before clamping, which can further improve the clamping ability of the device and thus improve the adaptability of the device. In addition, this setting can also simplify the operation before clamping the workpiece. When processing long arc arms, the above design can be used to add this device at the appropriate position of the workpiece, which can greatly improve the adaptability of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of the upper mounting base of this utility model;

[0016] Figure 3 This is a partial cross-sectional view of the air chamber structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the top rod and related components of this utility model.

[0018] In the diagram: 1. Lower mounting base; 2. Telescopic rod; 3. Mounting plate; 4. Friction pad one; 5. Friction pad two; 6. Upper mounting base; 7. Air chamber; 8. Elastic component; 9. Valve core; 10. Elastic sealing gasket; 11. Mounting bracket; 12. Mounting block; 13. Top rod; 14. Pneumatic rod; 15. Connecting rod; 16. Limit frame. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 The present invention provides a technical solution as follows:

[0021] In this embodiment, a clamping and fixing fixture for arc arm machining includes a lower mounting base 1. A telescopic rod 2 is fixedly arranged around the upper end of the lower mounting base 1. An upper mounting base 6 is fixedly arranged at the upper end of the telescopic rod 2. A mounting plate 3 is rotatably arranged in the middle of the interior of the upper mounting base 6. A friction pad 4 is slidably arranged on the side of the mounting plate 3 away from the telescopic rod 2. The friction pad 4 is rectangular. A friction pad 5 is arranged on one side of the friction pad 4. The friction pad 5 is fixedly connected to the upper mounting base 6. The upper mounting base 6 and the lower mounting base 1 have the same parts and layout and are mirror-symmetrical.

[0022] In this embodiment, an air chamber 7 is slidably disposed in the middle of the mounting plate 3. One end of the air chamber 7 is fixedly connected to the friction pad 4. Both ends of the air chamber 7 are fixedly disposed with elastic components 8. The other end of the elastic components 8 is fixedly connected to the lower mounting base 1 and the mounting base 6.

[0023] In this embodiment, a valve core 9 is provided on one end of the air chamber 7 near the mounting plate 3, and an elastic sealing gasket 10 is provided inside the air chamber 7. Both ends of the elastic sealing gasket 10 are fixedly connected to the air chamber 7, and the remaining part of the elastic sealing gasket 10 is slidably connected to the air chamber 7.

[0024] In this embodiment, a mounting frame 11 is provided below the elastic sealing gasket 10. The two ends of the mounting frame 11 are fixedly connected to the air chamber 7 through brackets, and a plurality of mounting blocks 12 are slidably provided in the middle of the mounting frame 11.

[0025] In this embodiment, a top rod 13 is slidably disposed in the middle of the mounting block 12. The area of ​​the upper half of the top rod 13 is smaller than the area of ​​the lower half. Pneumatic rods 14 are fixedly disposed inside the mounting bracket 11 on both sides of the mounting block 12.

[0026] In this embodiment, both ends of the mounting frame 11 are provided with connecting rods 15, and the other end of the connecting rod 15 is provided with a limiting frame 16. The connecting rod 15 and the limiting frame 16 are rotatably connected, and the limiting frame 16 is simultaneously slidably connected with the top rod 13. Inside the limiting frame 16, on both sides of the top rod 13, pneumatic rods 14 are also fixedly provided.

[0027] Working principle: When clamping the arc-shaped arm, the height of the limiting frame 16 must first be adjusted according to the thickness of the arc-shaped arm, or it must be decided whether to install the limiting frame. If the arc-shaped arm is too high, the limiting frame 16 needs to be removed or its height increased. To achieve the above operations, only the tightness of the nut on one side of the connecting rod 15 needs to be adjusted.

[0028] Then, place one end of the curved arm between the push rods 13, and then activate the telescopic rod 2 to retract it. As the telescopic rod 2 continues to move downward, the push rods 13 at both ends will move to the corresponding positions until the other end of the push rod 13 contacts the sealing gasket 10. At this time, if the air chamber 7 is full of gas, the deformability of the sealing gasket 10 is relatively small. In this case, it can only accommodate curved arms with a small curvature or a completely flat contact surface. If a curved arm with a large curvature is encountered, simply open the valve core 9 to adjust the air pressure in the air chamber 7 to the appropriate position.

[0029] Finally, after the push rod 13 can no longer move, the pneumatic rod 14 activates, pushing the push rod 13 towards the center, allowing the push rods 13 on both sides to further clamp the workpiece. Then, the telescopic rod 2 continues to retract until friction pad 4 contacts friction pad 5, indicating successful clamping and the start of processing. It should be noted that the mounting plate 3 can rotate freely. By rotating the upper and lower mounting plates 3, the distribution of the push rods 13 can be changed, thus accommodating more arc-shaped arms with different postures. However, once friction pad 4 contacts friction pad 5, the mounting plate 3 cannot rotate.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A clamping and fixing fixture for machining arc arms, comprising a lower mounting base (1), characterized in that, The upper end of the lower mounting base (1) is fixedly provided with a telescopic rod (2), and the upper end of the telescopic rod (2) is fixedly provided with an upper mounting base (6). The middle of the upper mounting base (6) is rotatably provided with a mounting plate (3). A friction pad (4) is slidably provided on the side of the mounting plate (3) away from the telescopic rod (2). The friction pad (4) is rectangular. A friction pad (5) is provided on one side of the friction pad (4). The friction pad (5) is fixedly connected to the upper mounting base (6). The upper mounting base (6) and the lower mounting base (1) have the same parts and layout and are mirror symmetrical.

2. The clamping and fixing fixture for arc arm machining according to claim 1, characterized in that, An air chamber (7) is slidably provided in the middle of the mounting plate (3). One end of the air chamber (7) is fixedly connected to the friction pad (4). Both ends of the air chamber (7) are fixedly provided with elastic components (8). The other end of the elastic components (8) is fixedly connected to the lower mounting base (1) and the mounting base (6).

3. The clamping and fixing fixture for arc arm machining according to claim 2, characterized in that, One end of the air chamber (7) is provided with a valve core (9) near the mounting plate (3). An elastic sealing gasket (10) is provided inside the air chamber (7). Both ends of the elastic sealing gasket (10) are fixedly connected to the air chamber (7), and the rest of the elastic sealing gasket (10) is slidably connected to the air chamber (7).

4. The clamping and fixing fixture for arc arm machining according to claim 3, characterized in that, A mounting bracket (11) is provided below the elastic sealing gasket (10). The two ends of the mounting bracket (11) are fixedly connected to the air chamber (7) through the bracket. Several mounting blocks (12) are slidably provided in the middle of the mounting bracket (11).

5. The clamping and fixing fixture for arc arm machining according to claim 4, characterized in that, A top rod (13) is slidably provided in the middle of the mounting block (12). The area of ​​the upper half of the top rod (13) is smaller than the area of ​​the lower half. Pneumatic rods (14) are fixedly provided inside the mounting frame (11) on both sides of the mounting block (12).

6. The clamping and fixing fixture for arc arm machining according to claim 5, characterized in that, Both ends of the mounting bracket (11) are provided with connecting rods (15), and the other end of the connecting rod (15) is provided with a limiting frame (16). The connecting rod (15) is rotatably connected to the limiting frame (16), and the limiting frame (16) is slidably connected to the top rod (13). The inside of the limiting frame (16) is also fixedly provided with pneumatic rods (14) on both sides of the top rod (13).

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