Positioning device for flange joint welding

Abstract

The utility model relates to the field of clamps, and discloses a positioning device for flange joint welding processing, which comprises an operating table and a three-jaw chuck, the three-jaw chuck comprises jaws, the operating table is a square frame, the upper part and the lower part of the operating table are flat plates, the top of the operating table is fixedly connected with the bottom of a plane bearing, and the plane bearing is fixedly connected with the operating table. The upper portion of the plane bearing is fixedly connected with the bottom of a three-jaw chuck, the top of the operation table is rotationally connected with the three-jaw chuck through the plane bearing, the outer wall of the three-jaw chuck is fixedly connected with four fixing blocks, the four fixing blocks are evenly distributed on the outer wall of the three-jaw chuck, pressing plates are arranged on the tops of the fixing blocks, and adjusting holes are formed in the pressing plates. The top of the fixing block is in threaded connection with a pressing stud. According to the utility model, the three-jaw chuck and the pressing stud are matched with the pressing plate, so that the steel pipe and the flange can be stably fixed, and the position of the pressing plate can be adjusted according to the flanges with different sizes, so that the fixture is suitable for welding the steel pipes and the flanges with various specifications.

Description

Technical Field

[0001] This utility model relates to the field of clamps, specifically a positioning device for welding flange joints. Background Technology

[0002] In industrial production, the welding of steel pipes and flanges is a common process, widely used in petroleum, chemical, machinery, power and other fields.

[0003] Current clamps often use a single fixing method, such as bolt connection or pressure plate clamping. This fixing method requires frequent clamp replacement or adjustment of fixing position when dealing with steel pipes and flanges of different specifications, which is cumbersome.

[0004] Due to the diverse specifications of steel pipes and flanges, fixtures often struggle to accommodate workpieces of all sizes, thus limiting their practical application. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, this utility model provides a positioning device for welding flange joints.

[0006] The technical solution adopted by this utility model is as follows:

[0007] A positioning device for flange joint welding includes an operating table and a three-jaw chuck. The three-jaw chuck includes jaws. The operating table is a square frame with flat plates at the top and bottom. The top of the operating table is fixedly connected to the bottom of a planar bearing, and the top of the planar bearing is fixedly connected to the bottom of the three-jaw chuck. The top of the operating table is rotatably connected to the three-jaw chuck via the planar bearing. Four fixing blocks are fixedly connected to the outer wall of the three-jaw chuck, and the four fixing blocks are evenly distributed on the outer wall of the three-jaw chuck. The top of the fixing blocks has a pressure plate with an adjustment hole. A clamping stud is threaded to the top of the fixing blocks, and the clamping stud passes through the adjustment hole. The clamping stud is connected to the adjustment hole. The hole has a gap, and the top and bottom of the clamping stud abut against the top of the pressure plate. The steel pipe is sleeved on the outer wall of the jaw, and the outer wall of the jaw abuts against the inner wall of the steel pipe. The flange is sleeved on the bottom of the outer wall of the steel pipe. The flange is on the upper part of the three-jaw chuck, and the bottom of the pressure plate abuts against the top of the flange. A support shaft is rotatably connected between the middle of the inner top wall and the inner bottom wall of the operating table. The top of the support shaft passes through the operating table and is fixedly connected to the bottom center of the three-jaw chuck. A bevel gear one is fixedly connected to the bottom of the outer wall of the support shaft. A motor is fixedly installed on the inner bottom wall of the operating table. A bevel gear two is fixedly connected to the end of the output shaft of the motor. The bevel gear two meshes with the bevel gear one.

[0008] The beneficial effects of this utility model are:

[0009] This invention utilizes a three-jaw chuck and a clamping stud with a pressure plate to achieve a stable fixation of steel pipes and flanges, ensuring that there is no shaking or displacement during welding and improving welding quality.

[0010] Because the adjustment hole and the clamping stud are fitted with a clearance fit, the position of the pressure plate can be adjusted according to flanges of different sizes, making the fixture suitable for welding steel pipes and flanges of various specifications.

[0011] The motor drives the three-jaw chuck to rotate, which can facilitate circumferential welding and improve welding efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 yes Figure 1 The right view;

[0014] Figure 3 yes Figure 2 Cross-sectional view at point AA;

[0015] Figure 4 yes Figure 1 The front view;

[0016] Figure 5 This is a schematic diagram of the structure of this utility model that eliminates the steel pipe and flange.

[0017] The reference numerals in all the attached drawings are as follows: 1. Operating table; 2. Three-jaw chuck; 3. Surface bearing; 4. Fixing block; 5. Pressure plate; 6. Adjusting hole; 7. Clamping stud; 8. Steel pipe; 9. Flange; 10. Support shaft; 11. Bevel gear one; 12. Motor; 13. Bevel gear two; 14. Chuck. Detailed Implementation

[0018] like Figure 1-5As shown: A positioning device for flange joint welding processing includes an operating table 1 and a three-jaw chuck 2. The three-jaw chuck 2 includes jaws 14. The operating table 1 is a square frame with flat plates at the top and bottom. The bottom of a plane bearing 3 is fixedly connected to the top of the operating table 1, and the bottom of the three-jaw chuck 2 is fixedly connected to the top of the plane bearing 3. The three-jaw chuck 2 is rotatably connected to the top of the operating table 1 via the plane bearing 3. Four fixing blocks 4 are fixedly connected to the outer wall of the three-jaw chuck 2, and the four fixing blocks 4 are evenly distributed on the outer wall of the three-jaw chuck 2. The top of the fixing block 4 has a pressure plate 5 with an adjustment hole 6. The top of the fixing block 4 is threaded with a clamping stud 7, which passes through the adjustment hole 6. The clamping stud 7 and the adjustment hole 6 are connected at an angle. The gap is such that the top and bottom of the clamping stud 7 are pressed against the top of the pressure plate 5, the steel pipe 8 is sleeved on the outer wall of the jaw 14, the outer wall of the jaw 14 abuts against the inner wall of the steel pipe 8, the flange 9 is sleeved on the bottom of the outer wall of the steel pipe 8, the flange 9 is on the upper part of the three-jaw chuck 2, the bottom of the pressure plate 5 abuts against the top of the flange 9, a support shaft 10 is rotatably connected between the middle of the inner top wall and the inner bottom wall of the operating table 1, the top of the support shaft 10 passes through the operating table 1, the top of the support shaft 10 is fixedly connected to the bottom center of the three-jaw chuck 2, a bevel gear 11 is fixedly connected to the bottom of the outer wall of the support shaft 10, a motor 12 is fixedly installed on the inner bottom wall of the operating table 1, a bevel gear 13 is fixedly connected to the end of the output shaft of the motor 12, and the bevel gear 13 meshes with the bevel gear 11.

[0019] The three-jaw chuck 2 is a prior art device. The motor 12 is a self-locking motor with a self-locking function when the machine stops.

[0020] First, the steel pipe 8 to be welded is fitted onto the top of the three-jaw chuck 2, ensuring that the inner wall of the steel pipe 8 is in close contact with the outer wall of the jaws of the three-jaw chuck 2, thereby achieving the initial fixation of the steel pipe 8.

[0021] Next, fit flange 9 onto the bottom of the outer wall of steel pipe 8, ensuring that flange 9 is in the correct position.

[0022] Then, by rotating the clamping studs 7 on the four fixing blocks 4, the clamping studs 7 are brought into contact with the top of the pressure plate 5, and the clamping studs 7 are rotated until the bottom of the pressure plate 5 is tightly pressed against the top of the flange 9. Since there is a gap between the adjusting hole 6 and the clamping studs 7, the clamping studs 7 can slide in the adjusting hole 6, and the position of the pressure plate 5 can be adjusted as needed to ensure that the flange 9 is pressed evenly and firmly.

[0023] Inside the operating table 1, the motor 12 starts, and the bevel gear 13 at the end of its output shaft meshes with the bevel gear 11 at the bottom of the outer wall of the support shaft 10, driving the support shaft 10 and the three-jaw chuck 2 fixedly connected to it to rotate. Since the three-jaw chuck 2 is rotatably connected to the operating table 1 through the plane bearing 3, the steel pipe 8 and the flange 9 can be rotated, which facilitates the welding operation.

[0024] With the steel pipe 8 and flange 9 fixed and rotatable, a welding operation is performed to firmly weld the steel pipe 8 and flange 9 together. This utility model only protects the mechanical parts; functions implemented through software control are not within the scope of protection of this utility model.

Claims

1. A positioning device for welding flange joints, comprising an operating table (1) and a three-jaw chuck (2), the three-jaw chuck (2) comprising jaws (14), the operating table (1) being a square frame, the upper and lower parts of the operating table (1) being flat plates, characterized in that, The top of the operating table (1) is fixedly connected to the bottom of the plane bearing (3), and the upper part of the plane bearing (3) is fixedly connected to the bottom of the three-jaw chuck (2). The top of the operating table (1) is rotatably connected to the three-jaw chuck (2) through the plane bearing (3). Four fixing blocks (4) are fixedly connected to the outer wall of the three-jaw chuck (2). The four fixing blocks (4) are evenly distributed on the outer wall of the three-jaw chuck (2). The top of the fixing block (4) has a pressure plate (5). The pressure plate (5) has an adjustment hole (6). The top of the fixing block (4) is threadedly connected to a clamping stud (7). The clamping stud (7) passes through the adjustment hole (6). There is a gap between the clamping stud (7) and the adjustment hole (6). The top and bottom of the clamping stud (7) abut against the top of the pressure plate (5). The steel pipe (8) is sleeved on the jaw (1). 4) The outer wall of the chuck (14) abuts against the inner wall of the steel pipe (8), the flange (9) is fitted on the bottom of the outer wall of the steel pipe (8), the flange (9) is on the upper part of the three-jaw chuck (2), the bottom of the pressure plate (5) abuts against the top of the flange (9), the middle of the inner top wall and the inner bottom wall of the operating table (1) is rotatably connected to the support shaft (10), the top of the support shaft (10) passes through the operating table (1), the top of the support shaft (10) is fixedly connected to the bottom center of the three-jaw chuck (2), the bottom of the outer wall of the support shaft (10) is fixedly connected to the first bevel gear (11), the inner bottom wall of the operating table (1) is fixedly installed with the motor (12), the output shaft end of the motor (12) is fixedly connected to the second bevel gear (13), the second bevel gear (13) meshes with the first bevel gear (11).

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