A pneumatic clamp for machine tools for tubular workpieces

Abstract

This utility model discloses a pneumatic machine tool fixture for tubular workpieces, including a cylinder, a mounting carrier, a linkage body, and clamping arms. Several clamping arms are arranged circumferentially and slidably connected to the mounting carrier. The cylinder is fixed to the mounting carrier, and the cylinder shaft drives all the clamping arms through the linkage body. The cylinder drives all the clamping arms to move simultaneously in opposite directions or back to back. Through the cooperation of the cylinder and the linkage body, the synchronous opposite or back-to-back movement of all the clamping arms is achieved, ensuring uniform distribution of clamping force, improving the clamping accuracy and stability of the workpiece. The pneumatic control method makes the fixture simple and quick to operate; only the air source of the cylinder needs to be controlled to achieve rapid clamping and unclamping of the workpiece, improving production efficiency. The ingenious connection method between the components makes the entire fixture structure compact, occupying little space, and easy to install and use in the limited space of a machine tool.

Description

Technical Field

[0001] This utility model relates to a pneumatic clamp for machine tools for tubular workpieces. Background Technology

[0002] Machining tubular workpieces is a common type of machining. During this process, fixtures are needed to fix and position the workpiece to ensure machining accuracy and stability. Traditional fixtures for tubular workpieces have the following main shortcomings:

[0003] Low clamping efficiency: Manual clamping is cumbersome and slow, making it difficult to meet the needs of high-efficiency production. In particular, frequent manual clamping will greatly reduce production efficiency during batch processing.

[0004] Poor versatility: Many traditional fixtures are designed for tubular workpieces of specific sizes and shapes. When the specifications of the workpiece change, the fixtures are often not universal and need to be redesigned and manufactured, which increases production costs and time costs.

[0005] Low level of automation: On automated production lines, traditional fixtures are difficult to integrate with automated equipment, making it impossible to achieve automated clamping and unloading, which limits the improvement of the automation level and production efficiency of the entire production line.

[0006] With the continuous development of machining technology, the requirements for machining accuracy, efficiency, and automation of tubular workpieces are becoming increasingly stringent. Therefore, developing a pneumatic clamp that can efficiently, stably, and accurately clamp tubular workpieces, while possessing good versatility and automation adaptability, has become a necessity for the industry. Summary of the Invention

[0007] This utility model provides a pneumatic clamp for machine tools for tubular workpieces to solve the problems existing in the prior art.

[0008] The technical solutions adopted in this utility model are as follows:

[0009] A pneumatic clamping fixture for tubular workpieces includes a cylinder, a mounting carrier, a linkage body, and clamping arms. Several clamping arms are arranged circumferentially and slidably connected to the mounting carrier. The cylinder is fixed to the mounting carrier. The cylinder shaft of the cylinder links all the clamping arms through the linkage body. The cylinder drives all the clamping arms to move simultaneously toward or away from each other.

[0010] Furthermore, the linkage includes connecting rods and hinge seats. Each connecting rod is hinged to form a group. The free ends of the two connecting rods in each group, located on the same side of the hinge center, are respectively hinged to two hinge seats. On the other side, one of the free ends is rotatably connected to the clamping arm, and the other free end is rotatably and slidably connected to the same clamping arm.

[0011] Furthermore, one of the hinge seats is connected to the cylinder shaft of the cylinder, while the other hinge seat remains in a fixed position.

[0012] Furthermore, the mounting carrier includes a base and a mounting cylinder, the mounting cylinder is fixed to the base, the cylinder is coaxial with the mounting cylinder, and a hinged seat that maintains a fixed position is fixed to the mounting cylinder.

[0013] Furthermore, several sliding grooves are provided on the outer wall of the mounting cylinder and the base. The sliding grooves on the mounting cylinder and the base that are interconnected form a set for assembling a clamping arm, thereby realizing the sliding connection of the clamping arm on the mounting carrier.

[0014] Furthermore, a bucket lid is fixed on the mounting cylinder, and the corresponding hinge seat is fixedly connected to the bucket lid.

[0015] Furthermore, rubber pads are inserted into the clamping surfaces of each clamping arm.

[0016] This utility model has the following beneficial effects:

[0017] (1) By cooperating with the cylinder and the linkage, all clamping arms can move synchronously in opposite directions or in opposite directions, ensuring that the clamping force is evenly distributed, improving the clamping accuracy and stability of the workpiece. The pneumatic control method makes the operation of the fixture simple and quick. Only the air source of the cylinder needs to be controlled to achieve the rapid clamping and loosening of the workpiece, thus improving production efficiency.

[0018] (2) The clever connection between the components makes the entire fixture structure compact, occupies little space, and is easy to install and use in the limited space of the machine tool. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the present utility model.

[0020] Figure 2 This is a diagram of the internal structure of the fixture.

[0021] Figure 3 This is an exploded view of the installed cylinder. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figures 1 to 3 This utility model discloses a pneumatic clamping fixture for tubular workpieces, comprising a cylinder 1, a mounting carrier 2, a linkage body 3, and a clamping arm 4. The mounting carrier 2 serves as the basic support structure and consists of a base 21 and a mounting cylinder 22, which are fixedly connected to form a stable whole. The cylinder 1 is fixed to the base 21 and coaxial with the mounting cylinder 22, thereby ensuring the accuracy of subsequent clamping arm movements.

[0024] The number of clamping arms 4 is determined according to the actual size and processing requirements of the tubular workpiece, and is usually three or more, arranged evenly in the circumferential direction. Each clamping arm 4 is slidably connected to the mounting carrier 2 through a sliding groove. The sliding grooves are respectively set on the outer wall of the mounting cylinder 22 and the base 21, and are interconnected to form a complete sliding guide structure, so that the clamping arm can slide stably on the mounting carrier to realize the action of clamping and releasing the workpiece.

[0025] The linkage 3 is a key component for achieving synchronous movement of the clamping arm, including connecting rods 31 and hinge seats 32. Each pair of connecting rods 31 is hinged together to form a set, and the free ends of the two connecting rods in each set, located on the same side of the hinge center, are respectively hinged to two hinge seats 32. One hinge seat 32 is connected to the cylinder shaft of cylinder 1, serving as the power input end; the other hinge seat 32 is fixed to the mounting cylinder 22, maintaining its position, and providing support and positioning.

[0026] When cylinder 1 is working, the cylinder shaft extends and retracts, causing the connected hinge seat 32 to move. This movement, in turn, through the transmission of connecting rod 31, causes all clamping arms 4 to move simultaneously towards or away from each other. Specifically, when the cylinder shaft extends, the connecting rod assembly causes the clamping arms 4 to move away from the central axis, thus clamping the tubular workpiece; when the cylinder shaft retracts, the clamping arms 4 move towards the central axis, releasing the workpiece.

[0027] A rubber pad 41 is inserted into the clamping surface of the clamping arm 4. The rubber pad 41 is made of rubber material with good elasticity and wear resistance, which can increase the friction between the clamping surface and the workpiece, prevent the workpiece from sliding during processing, and protect the workpiece surface from being scratched.

[0028] The connection between the clamping arm 4 and the linkage body 3 is a combination of rotational connection and rotational sliding connection.

[0029] When each pair of connecting rods 31 is connected to the clamping arm 4, one connecting rod 31 is rotatably connected to the clamping arm 4, while the other connecting rod 31 is rotatably and slidably connected to the same clamping arm 4. This connection method allows the clamping arm 4 to rotate around a certain point and slide within the groove under the drive of the connecting rod group, thereby achieving complex motion trajectories and ensuring that the clamping arm can accurately center and clamp tubular workpieces.

[0030] In actual use, first install this pneumatic clamp in a suitable position on the machine tool, ensuring that the central axis of the mounting cylinder 22 coincides with the central axis of the machine tool spindle to guarantee machining accuracy. Then, adjust the initial position of the clamping arm 4 according to the outer diameter of the tubular workpiece, so that the clamping arm is in the open state, which facilitates the clamping of the workpiece.

[0031] When workpiece clamping is required, cylinder 1 is activated, the cylinder shaft extends, and through the transmission of linkage 3, all clamping arms 4 move simultaneously away from the central axis. The rubber pad 41 contacts the outer surface of the workpiece and generates pressure, firmly clamping the workpiece in the center position. During processing, the clamping arms 4 can automatically adjust the clamping force according to the shape and size of the workpiece to ensure workpiece stability.

[0032] After processing is completed, cylinder 1 reverses its movement, the cylinder shaft retracts, and clamping arm 4 moves towards the central axis under the drive of linkage 3, releasing the workpiece. At this time, the processed workpiece can be easily removed, and the next workpiece can be clamped.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A pneumatic clamping fixture for machine tools for tubular workpieces, characterized in that: Includes a cylinder (1), a mounting carrier (2), a linkage body (3), and clamping arms (4). Several clamping arms (4) are arranged circumferentially and are slidably connected to the mounting carrier (2). The cylinder (1) is fixed to the mounting carrier (2). The cylinder shaft of the cylinder (1) is linked to all the clamping arms (4) through the linkage body (3). The cylinder (1) drives all the clamping arms (4) to move towards each other or away from each other at the same time.

2. The pneumatic machine tool fixture for tubular workpieces as described in claim 1, characterized in that: The linkage (3) includes a connecting rod (31) and a hinge seat (32). Every two connecting rods (31) are hinged to each other to form a group. The free ends of the two connecting rods (31) in each group, located on the same side of the hinge center, are respectively hinged to the two hinge seats (32). On the other side, one of the free ends is rotatably connected to the clamping arm (4), and the other free end is rotatably and slidably connected to the same clamping arm (4).

3. The pneumatic clamp for tubular workpieces as described in claim 2, characterized in that: One of the hinge seats (32) is connected to the cylinder shaft of the cylinder (1), while the other hinge seat (32) remains in a fixed position.

4. The pneumatic machine tool fixture for tubular workpieces as described in claim 3, characterized in that: The mounting carrier (2) includes a base (21) and a mounting cylinder (22). The mounting cylinder (22) is fixed to the base (21), the cylinder (1) is coaxial with the mounting cylinder (22), and the hinge seat (32) with a fixed position is fixed to the mounting cylinder (22).

5. The pneumatic machine tool fixture for tubular workpieces as described in claim 4, characterized in that: The outer wall of the mounting cylinder (22) and the base (21) are provided with several sliding grooves. The sliding grooves on the mounting cylinder (22) and the base (21) are interconnected to form a set for assembling a clamping arm (4) to realize the sliding connection of the clamping arm (4) on the mounting carrier (2).

6. The pneumatic machine tool fixture for tubular workpieces as described in claim 4, characterized in that: A bucket lid (23) is fixed on the mounting cylinder (22), and the corresponding hinge seat (32) is fixedly connected to the bucket lid (23).

7. The pneumatic machine tool fixture for tubular workpieces as described in claim 1, characterized in that: A rubber pad (41) is inserted into the clamping surface of each clamping arm (4).

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