Quick-change positioning device of steel pipe welding tool

Abstract

The utility model discloses a quick-change positioning device of a steel pipe welding tool, which comprises a box-shaped turntable with an opening at the top and two steel pipe tool clamp bottom plates, and rectangular clamping grooves are arranged on two sides of the top of the box-shaped turntable. The bottom of the steel pipe tool clamp bottom plate is fixedly connected with rectangular clamping sleeves which are movably clamped in the corresponding rectangular clamping grooves in a sleeved mode. By arranging a series of structures, the two steel pipe tool clamp bottom plates can be conveniently and accurately rotated, adjusted and positioned for alternate utilization, independent shutdown for replacement is not needed after welding at a left station is completed, the working efficiency is improved, the steel pipe tool clamp bottom plate on the right side can be conveniently and automatically unlocked after rotated, adjusted and positioned, and the working efficiency is improved. And the right replacement and the welding work of the left station can be synchronously carried out and do not interfere with each other, so that the effect of conveniently and rapidly positioning the steel pipe tool clamp bottom plate without influencing the welding work is achieved, and the use flexibility is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe tooling fixtures, in particular to a quick-change positioning device for a steel pipe welding tooling. Background Technique

[0002] During the steel pipe welding process, in order to clamp and position the workpiece, several kinds of tooling fixtures are usually required to adapt to steel pipes of different sizes. The fixture is usually provided with a base. When it needs to be installed, it is carried to the workbench, and then the base is fixed to the workbench. However, there are some problems with the existing tooling fixtures during use.

[0003] For the existing steel pipe welding tooling fixture, after the steel pipe welding is completed, it is necessary to shut down to stop the welding work, and then remove the steel pipe to replace the steel pipe to be welded. This method requires a lot of downtime and replacement waiting time, and the work efficiency is low. It cannot perform convenient quick-change positioning work without affecting the welding work. In view of this, this application proposes a quick-change positioning device for a steel pipe welding tooling. Content of the Utility Model

[0004] The purpose of the utility model is to provide a quick-change positioning device for a steel pipe welding tooling to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A quick-change positioning device for a steel pipe welding tooling, including a box-shaped turntable with an open top and two steel pipe tooling fixture bottom plates. Rectangular clamping grooves are opened on both sides of the top of the box-shaped turntable. A rectangular clamping sleeve that is movably clamped in the corresponding rectangular clamping groove is fixedly connected to the bottom of the steel pipe tooling fixture bottom plate. A workbench is arranged below the box-shaped turntable. By pre-installing the steel pipe welding tooling fixture on the top of the steel pipe tooling fixture bottom plate, its support is realized;

[0006] A U-shaped support plate and a PLC controller are fixedly connected to the bottom of the workbench. A rotary drive assembly that is fixedly installed and embedded with the bottom of the box-shaped turntable is rotatably installed on the top of the workbench. A servo brake motor with an output shaft fixedly connected to the rotary drive assembly is fixedly installed at the bottom of the U-shaped support plate. The servo brake motor is electrically connected to the PLC controller. The rotary drive assembly is used to drive the box-shaped turntable to rotate when the servo brake motor is started. The box-shaped turntable drives the two steel pipe tooling fixture bottom plates to rotate through the two rectangular clamping sleeves for rotary positioning. The rotary positioning method can ensure that the station on the left can continue to work without waiting;

[0007] A rotation position sensing component electrically connected to the PLC controller is fixedly connected between the bottom of the box-shaped turntable and the top of the workbench. The rotation position sensing component is used to sense the rotation position of the box-shaped turntable and transmit corresponding signals to the PLC controller. After the rotation reaches the position, the PLC controller is used to automatically control the servo brake motor to close in time, so as to realize the precise rotation adjustment and positioning of the bottom plates of the two steel pipe tooling jigs.

[0008] Elastic clamping components are fixedly connected to the inner walls on both sides of the box-shaped turntable. The mutually repulsive ends of the two elastic clamping components are respectively movably clamped into the corresponding rectangular sleeves. A transverse driving extrusion unlocking component electrically connected to the PLC controller is fixedly installed on the bottom inner wall of the U-shaped support plate. The top of the transverse driving extrusion unlocking component extends into the box-shaped turntable and cooperates with the elastic clamping component on the right. The elastic clamping component is used to clamp and lock the bottom plate of the steel pipe tooling jig through the corresponding rectangular sleeve. The transverse driving extrusion unlocking component is used to be controlled by the PLC controller to automatically unlock the elastic clamping component on the right after the rotation adjustment reaches the position, which is convenient for the use of the left station and disassembling and replacing the bottom plate of the steel pipe tooling jig on the right, and realizes the effect of quick replacement without affecting the left welding work.

[0009] Preferably, the rotation driving component includes a rotating pipe rotatably installed on the top of the workbench. The rotating pipe is embedded and fixed at the bottom of the box-shaped turntable. The bottom end of the rotating pipe extends into the U-shaped support plate. An external gear ring located in the U-shaped support plate is fixedly sleeved on the rotating pipe. A gear is meshed with the right side of the external gear ring. The bottom of the gear is fixedly connected to the top end of the output shaft of the servo brake motor.

[0010] Preferably, the rotation position sensing component includes an infrared receiving sensor fixedly connected to the right side of the top of the workbench. Infrared transmitters are fixedly connected to both sides of the bottom of the box-shaped turntable. The infrared receiving sensor cooperates with the two infrared transmitters. The infrared receiving sensor is electrically connected to the PLC controller.

[0011] Preferably, the elastic clamping component includes a fixed seat fixedly connected to the side wall of the box-shaped turntable. Rectangular holes are formed in the inner walls of the two adjacent sides of the rectangular card slots. A clamping rod is slidably sleeved in the rectangular hole. The mutually repulsive ends of the two clamping rods are respectively movably clamped into the corresponding rectangular sleeves and are set to be arc-shaped structures. L-shaped buckling rods are fixedly connected to the adjacent ends of the two clamping rods. The fixed seat is slidably sleeved on the corresponding L-shaped buckling rod. A spring is fixedly connected between the clamping rod and the corresponding fixed seat. The spring is slidably sleeved on the corresponding L-shaped buckling rod.

[0012] Preferably, the transverse driving and squeezing unlocking assembly includes a vertical support rod fixedly connected to the inner wall of the bottom of the U-shaped support plate. The top end of the vertical support rod movably penetrates through the inside of the rotating pipe and is fixedly connected to an electric push rod located inside the box-shaped turntable. The extending end of the electric push rod is fixedly connected to an L-shaped pull rod. The top end of the L-shaped pull rod is located inside the L-shaped buckle rod on the right side and cooperates with it. The electric push rod is electrically connected to the PLC controller.

[0013] Preferably, a circular hole is formed in the top of the workbench, and a bearing is fixedly sleeved in the circular hole. The inner ring of the bearing is fixedly sleeved on the outer side of the rotating pipe.

[0014] Preferably, legs are fixedly connected to the four corners of the bottom of the workbench, and a plurality of bolt installation through holes are formed in the top of the steel pipe fixture bottom plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. For this quick-change positioning device of a steel pipe welding tooling, through the cooperation of the PLC controller, servo brake motor, box-shaped turntable, rectangular clamping sleeve, steel pipe fixture bottom plate, rotation driving assembly and rotation position sensing assembly, the two steel pipe fixture bottom plates can be accurately rotated and positioned for alternative use. By using the alternative use method, there is no need to wait for replacement by stopping the machine separately after the welding at the left station is completed, improving the work efficiency.

[0017] 2. For this quick-change positioning device of a steel pipe welding tooling, through the cooperation of the PLC controller, elastic clamping assembly and transverse driving and squeezing unlocking assembly, the steel pipe fixture bottom plate on the right can be automatically unlocked after rotation and positioning, facilitating the operator to quickly insert and remove the steel pipe fixture bottom plate on the right. Moreover, the replacement on the right can be carried out synchronously with the welding work at the left station without interference, achieving the effect of quickly and conveniently positioning the steel pipe fixture bottom plate without affecting the welding work, improving the work efficiency and use flexibility. And through the quick disassembly and replacement method, it is convenient to quickly replace different steel pipe welding fixtures according to steel pipes of different sizes.

[0018] By arranging a series of structures, the utility model is convenient for accurately rotating and positioning the two steel pipe fixture bottom plates for alternative use, without the need to wait for replacement by stopping the machine separately after the welding at the left station is completed, improving the work efficiency. It is also convenient to automatically unlock the steel pipe fixture bottom plate on the right after rotation and positioning, facilitating the operator to quickly insert and remove the steel pipe fixture bottom plate on the right. Moreover, the replacement on the right can be carried out synchronously with the welding work at the left station without interference, achieving the effect of quickly and conveniently positioning the steel pipe fixture bottom plate without affecting the welding work and improving the use flexibility. Description of the Drawings

[0019] Figure 1Schematic structural diagram of a quick-change positioning device for a steel pipe welding tooling proposed by the present utility model;

[0020] Figure 2 is Figure 1 cross-sectional structural schematic diagram;

[0021] Figure 3 is Figure 2 enlarged structural schematic diagram of part A in

[0022] In the figure: 100, steel pipe tooling fixture bottom plate; 101, rectangular socket; 1, box-shaped turntable; 2, workbench; 3, rotating pipe; 4, U-shaped support plate; 5, external gear ring; 6, gear; 7, servo brake motor; 8, rectangular card slot; 9, rectangular hole; 10, fixed seat; 11, L-shaped latch rod; 12, latch rod; 13, spring; 14, L-shaped pull rod; 15, electric push rod; 16, vertical support rod; 17, PLC controller; 18, infrared receiving sensor; 19, infrared emitter. Specific implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figures 1 to 3 shown, a quick-change positioning device for a steel pipe welding tooling proposed in this embodiment includes a box-shaped turntable 1 with an open top and two steel pipe tooling fixture bottom plates 100. Rectangular card slots 8 are opened on both sides of the top of the box-shaped turntable 1. A rectangular socket 101 that is movably sleeved in the corresponding rectangular card slot 8 is fixedly connected to the bottom of the steel pipe tooling fixture bottom plate 100. A workbench 2 is arranged below the box-shaped turntable 1. Legs are fixedly connected to the four corners of the bottom of the workbench 2. A plurality of bolt installation through holes are opened on the top of the steel pipe tooling fixture bottom plate 100 for personnel to install a steel pipe welding tooling through external bolts. By pre-installing the steel pipe welding tooling on the top of the steel pipe tooling fixture bottom plate 100, its support is realized;

[0025] The bottom of the workbench 2 is fixedly connected with a U-shaped support plate 4 and a PLC controller 17. The top of the workbench 2 is rotatably installed with a rotary drive assembly fixedly embedded at the bottom of the box-shaped turntable 1. The bottom of the U-shaped support plate 4 is fixedly installed with a servo brake motor 7 whose output shaft is fixedly connected with the rotary drive assembly. The servo brake motor 7 is electrically connected with the PLC controller 17. The rotary drive assembly is used to drive the box-shaped turntable 1 to rotate when the servo brake motor 7 starts. The box-shaped turntable 1 drives two steel pipe fixture bases 100 to rotate through two rectangular sleeves 101 for rotary adjustment. The rotary adjustment method can ensure that the workstations on the left can continue to work without waiting. A rotary position sensing assembly electrically connected with the PLC controller 17 is fixedly connected between the bottom of the box-shaped turntable 1 and the top of the workbench 2. The rotary position sensing assembly is used to sense the rotary position of the box-shaped turntable 1 and transmit corresponding signals to the PLC controller 17. After the rotation is in place, the PLC controller 17 automatically controls the servo brake motor 7 to close in time, realizing the precise rotary adjustment and positioning of the two steel pipe fixture bases 100.

[0026] Elastic clamping assemblies are fixedly connected to the inner walls on both sides of the box-shaped turntable 1. The mutually repelling ends of the two elastic clamping assemblies are respectively movably clamped into the corresponding rectangular sleeves 101. A transverse drive extrusion unlocking assembly electrically connected with the PLC controller 17 is fixedly installed on the inner bottom wall of the U-shaped support plate 4. The top of the transverse drive extrusion unlocking assembly extends into the box-shaped turntable 1 and cooperates with the elastic clamping assembly on the right. The elastic clamping assembly is used to clamp and lock the steel pipe fixture base 100 through the corresponding rectangular sleeve 101. The transverse drive extrusion unlocking assembly is used to be controlled by the PLC controller 17 to automatically unlock the elastic clamping assembly on the right after the rotary adjustment is in place, facilitating the disassembly, replacement of the steel pipe fixture base 100 on the right while the left workstation is in use, and achieving the effect of quick replacement without affecting the left welding work.

[0027] Specifically, the rotary drive assembly includes a rotating pipe 3 rotatably installed on the top of the workbench 2. A circular hole is opened on the top of the workbench 2, and a bearing is fixedly sleeved in the circular hole. The inner ring of the bearing is fixedly sleeved on the outer side of the rotating pipe 3, achieving the effect of rotatably installing the rotating pipe 3. The rotating pipe 3 is fixedly embedded at the bottom of the box-shaped turntable 1. An embedding hole fixedly connected to the outer side of the rotating pipe 3 is opened at the center of the bottom of the box-shaped turntable 1. The bottom end of the rotating pipe 3 extends into the U-shaped support plate 4. An external gear ring 5 located in the U-shaped support plate 4 is fixedly sleeved on the rotating pipe 3. A gear 6 meshes with the right side of the external gear ring 5. The bottom of the gear 6 is fixedly connected to the top end of the output shaft of the servo brake motor 7. The arranged rotating pipe 3, external gear ring 5 and gear 6 cooperate. The servo brake motor 7 drives the gear 6 to rotate, and the gear 6 drives the rotating pipe 3 to rotate through the external gear ring 5. The rotating pipe 3 is used to drive the box-shaped turntable 1 to rotate, thereby achieving the effect of alternately using the two steel pipe fixture bases 100 for rotary adjustment.

[0028] Further, the rotation position induction component includes an infrared receiving sensor 18 fixedly connected to the right side of the top of the workbench 2. Infrared transmitters 19 are fixedly connected to both sides of the bottom of the box-shaped turntable 1. The infrared receiving sensor 18 cooperates with the two infrared transmitters 19, and the infrared receiving sensor 18 is electrically connected to the PLC controller 17. The provided infrared receiving sensor 18 and infrared transmitters 19 cooperate. The rotating box-shaped turntable 1 drives the two infrared transmitters 19 to rotate. The two rotating infrared transmitters 19 are alternately aligned with the infrared receiving sensor 18. When aligned, the precise rotation adjustment and swapping of the positions of the two steel pipe fixture bases 100 are completed. The infrared receiving sensor 18 receives the infrared signal and transmits the stop signal and unlocking signal to the PLC controller 17. The PLC controller 17 controls the servo brake motor 7 to automatically close, achieving the effect of precise positioning, rotation adjustment, and alternate utilization.

[0029] Further, the elastic clamping component includes a fixed seat 10 fixedly connected to the side wall of the box-shaped turntable 1. Rectangular holes 9 are formed in the inner walls of the two adjacent sides of the two rectangular card slots 8. A clamping rod 12 is slidably sleeved in the rectangular hole 9. The mutually repelling ends of the two clamping rods 12 are respectively movably clamped into the corresponding rectangular card sleeves 101 and are set to be arc-shaped structures. L-shaped buckling rods 11 are fixedly connected to the adjacent ends of the two clamping rods 12. The fixed seat 10 is slidably sleeved on the corresponding L-shaped buckling rod 11. A rectangular guiding hole for the outer side of the corresponding L-shaped buckling rod 11 to slide through is formed in one side of the fixed seat 10, achieving the effect of guiding the lateral sliding of the L-shaped buckling rod 11. A spring 13 is fixedly connected between the clamping rod 12 and the corresponding fixed seat 10, and the spring 13 is movably sleeved on the corresponding L-shaped buckling rod 11. The cooperation of the fixed seat 10, rectangular hole 9, clamping rod 12, spring 13, and L-shaped buckling rod 11 is provided. The corresponding clamping rod 12 is elastically supported by the spring 13, and the clamping of the clamping rod 12 with the corresponding rectangular card sleeve 101 is utilized to achieve the clamping and locking of the steel pipe fixture base 100.

[0030] Further, the horizontal drive and extrusion unlocking assembly includes a vertical support rod 16 fixedly connected to the inner wall of the bottom of the U-shaped support plate 4. The top of the vertical support rod 16 movably penetrates through the inside of the rotating tube 3 and is fixedly connected to an electric push rod 15 located inside the box-shaped turntable 1. The extending end of the electric push rod 15 is fixedly connected to an L-shaped pull rod 14. The top of the L-shaped pull rod 14 is located inside the right L-shaped latch rod 11 and cooperates with it. The electric push rod 15 is electrically connected to the PLC controller 17. The arranged vertical support rod 16, electric push rod 15 and L-shaped pull rod 14 cooperate. When the PLC controller 17 receives the unlocking signal, it also controls the electric push rod 15 to start in the reverse direction. The electric push rod 15 drives the L-shaped pull rod 14 to move leftward. The L-shaped pull rod 14 squeezes and drives the right L-shaped latch rod 11 to move leftward. The right L-shaped latch rod 11 drives the right latch rod 12 to move leftward to separate from the right rectangular socket 101 and compresses the right spring 13, achieving the effect of automatically unlocking the right steel pipe tooling fixture bottom plate 100 after rotation adjustment. This facilitates the personnel to quickly and conveniently insert and remove and replace the right steel pipe tooling fixture bottom plate 100. Moreover, the replacement on the right side can be synchronized with the welding work at the left station without interference with each other, improving work efficiency.

[0031] The usage method of this embodiment is as follows: The steel pipe welding tooling fixture is fixedly installed on the top of the corresponding steel pipe tooling fixture bottom plate 100 through external bolts to support it. The left side is the welding station, and the right side is the quick-change station. After the welding is completed on the left side, the personnel forwardly start the servo brake motor 7 to drive the gear 6 to rotate. The gear 6 drives the rotating tube 3 to rotate through the external gear ring 5. The rotating tube 3 drives the box-shaped turntable 1 to rotate. The box-shaped turntable 1 drives the two steel pipe tooling fixture bottom plates 100 to rotate through the two rectangular sockets 101 to rotate and swap positions. At the same time, the box-shaped turntable 1 drives the two infrared transmitters 19 to rotate. When the left infrared transmitter 19 rotates to the right and is vertically aligned with the infrared receiving sensor 18, the infrared receiving sensor 18 receives the infrared signal and transmits the stop signal and unlocking signal to the PLC controller 17. At this time, the PLC controller 17 controls the servo brake motor 7 to automatically shut down, achieving the effect of accurately rotating and positioning the two steel pipe tooling fixture bottom plates 100 for alternative use. By using the alternative use method, there is no need to wait for replacement by shutting down separately, improving work efficiency.

[0032] When the PLC controller 17 receives the unlocking signal, it also controls the electric push rod 15 to start in the reverse direction. The electric push rod 15 drives the L-shaped pull rod 14 to move to the left. The L-shaped pull rod 14 squeezes and drives the L-shaped buckle rod 11 on the right to move to the left. The L-shaped buckle rod 11 on the right drives the latch rod 12 on the right to move to the left and separate from the rectangular socket 101 on the right, and compresses the spring 13 on the right, achieving the effect of automatically unlocking the steel pipe fixture bottom plate 100 on the right after rotation adjustment. At this time, the operator can directly move the steel pipe fixture bottom plate 100 on the right upward, causing it to drive the corresponding rectangular socket 101 to separate from the rectangular card slot 8, and the disassembly is completed. Then, the rectangular socket 101 at the bottom of the new steel pipe fixture bottom plate 100 is inserted into the rectangular card slot 8 on the right. Then, the operator starts the electric push rod 15 in the forward direction to drive the L-shaped pull rod 14 to move back to the right, relaxing the pulling force on the L-shaped buckle rod 11 on the right. At this time, the latch rod 12 in the compressed state moves to the right and is inserted into the rectangular socket 101 on the right, achieving the clamping and locking of the steel pipe fixture bottom plate 100 on the right, and the replacement is completed. This makes it convenient to automatically unlock the steel pipe fixture bottom plate 100 on the right after rotation adjustment, facilitating the operator to quickly and conveniently unplug and replace the steel pipe fixture bottom plate 100 on the right. Moreover, the replacement on the right can be synchronized with the welding work at the left station without interference, achieving the effect of quickly and conveniently positioning the steel pipe fixture bottom plate 100 without affecting the welding work and improving work efficiency. After the welding on the left is completed again, the rotation adjustment can be carried out again in the same way for alternative use. By means of quick disassembly and replacement, it is convenient to quickly replace different steel pipe welding fixtures according to the steel pipes of different sizes. By means of rotation adjustment and alternative use, it is convenient to directly carry out the welding work of the next steel pipe workpiece without stopping the machine.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A quick-change positioning device for a steel pipe welding fixture, comprising a box-shaped turntable (1) with an opening at the top and two steel pipe fixture bottom plates (100), characterized in that: Rectangular slots (8) are provided on both sides of the top of the box-shaped turntable (1), a rectangular clamping sleeve (101) movable in the corresponding rectangular slot (8) is fixedly connected to the bottom of the bottom plate (100) of the steel pipe fixture, and a workbench (2) is provided below the box-shaped turntable (1); The bottom of the workbench (2) is fixedly connected with a U-shaped support plate (4) and a PLC controller (17); the top of the workbench (2) is rotatably mounted with a rotary drive assembly embedded and fixed with the bottom of the box-shaped turntable (1); the bottom of the U-shaped support plate (4) is fixedly mounted with a servo brake motor (7) whose output shaft is fixedly connected with the rotary drive assembly; the servo brake motor (7) is electrically connected with the PLC controller (17); A rotation position sensing component electrically connected to a PLC controller (17) is fixedly connected between the bottom of the box-shaped turntable (1) and the top of the workbench (2); Elastic clamping components are fixedly connected to the inner walls on both sides of the box-shaped turntable (1), and the repelling ends of the two elastic clamping components are movably clamped into the corresponding rectangular clamping sleeves (101) respectively. A horizontal drive squeeze unlocking component electrically connected to the PLC controller (17) is fixedly installed on the bottom inner wall of the U-shaped support plate (4), and the top of the horizontal drive squeeze unlocking component extends into the box-shaped turntable (1) and cooperates with the elastic clamping component on the right side.

2. The quick-change positioning device for steel pipe welding tooling according to claim 1, characterized in that: The rotary drive assembly comprises a rotating tube (3) rotatably mounted on the top of the workbench (2), the rotating tube (3) being embedded and fixed in the bottom of the box-shaped turntable (1), the bottom end of the rotating tube (3) extending into the U-shaped support plate (4), an outer gear ring (5) located in the U-shaped support plate (4) being fixedly sleeved on the rotating tube (3), a gear (6) being meshed on the right side of the outer gear ring (5), and the bottom of the gear (6) being fixedly connected to the top end of the output shaft of the servo brake motor (7).

3. The quick-change positioning device for steel pipe welding tooling according to claim 2, characterized in that: The rotational position sensing component comprises an infrared receiving sensor (18) fixedly connected to the right side of the top of the workbench (2), and infrared transmitters (19) are fixedly connected to both sides of the bottom of the box-shaped turntable (1), the infrared receiving sensor (18) cooperates with the two infrared transmitters (19), and the infrared receiving sensor (18) is electrically connected to the PLC controller (17).

4. The quick-change positioning device for steel pipe welding tooling according to claim 3 is characterized in that: The elastic clamping assembly comprises a fixing seat (10) fixedly connected to the side wall of the box-shaped turntable (1); a rectangular hole (9) is opened on the inner wall of the adjacent side of the two rectangular clamping grooves (8); a clamping rod (12) is slidably sleeved in the rectangular hole (9); the repelling ends of the two clamping rods (12) are respectively movably clamped into the corresponding rectangular clamping sleeves (101) and are arranged in an arc structure; the adjacent ends of the two clamping rods (12) are fixedly connected to an L-shaped buckle rod (11); the fixing seat (10) is slidably sleeved on the corresponding L-shaped buckle rod (11); a spring (13) is fixedly connected between the clamping rod (12) and the corresponding fixing seat (10); and the spring (13) is movably sleeved on the corresponding L-shaped buckle rod (11).

5. The quick-change positioning device for steel pipe welding tooling according to claim 4, characterized in that: The horizontal drive extrusion unlocking assembly comprises a vertical support rod (16) fixedly connected to the inner wall of the bottom of the U-shaped support plate (4), the top end of the vertical support rod (16) movably passes through the interior of the rotating tube (3) and is fixedly connected to an electric push rod (15) located in the box-shaped turntable (1), the protruding end of the electric push rod (15) is fixedly connected to an L-shaped pull rod (14), the top end of the L-shaped pull rod (14) is located on the inner side of the L-shaped buckle rod (11) on the right side and cooperates with it, and the electric push rod (15) is electrically connected to a PLC controller (17).

6. The quick-change positioning device for steel pipe welding tooling according to claim 2, characterized in that: A circular hole is provided on the top of the workbench (2), a bearing is fixedly sleeved in the circular hole, and the inner ring of the bearing is fixedly sleeved on the outer side of the rotating tube (3).

7. The quick-change positioning device for steel pipe welding tooling according to claim 1, characterized in that: The four corners of the bottom of the workbench (2) are all fixedly connected with supporting legs, and the top of the steel pipe fixture bottom plate (100) is provided with a plurality of bolt installation through holes.

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