Friction welding device and method for short joint oil pipe

Abstract

The invention discloses a friction welding device and method for a short joint oil pipe, and relates to the technical field of short joint oil pipe machining. The friction welding device comprises a base, the upper side of the base is fixedly connected with a fixed workbench, and the upper side of the base is further slidably provided with a movable workbench; three-jaw chucks are rotatably mounted on the side walls of the fixed workbench and the movable workbench, a protective cylinder is mounted between the fixed workbench and the movable workbench, a detection assembly is mounted in the protective cylinder, and the detection assembly comprises a plurality of through grooves formed in the side walls of the two sides of the protective cylinder. In the friction welding process, the protection barrel is located between the fixed workbench and the movable workbench all the time, during friction welding, generated sparks are located in the protection barrel all the time, the possibility that the sparks splash all around is reduced, and the machining safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of short joint oil pipe processing, in particular to a friction welding device and method for a short joint oil pipe. Background Art

[0002] ‌Short joint oil pipe‌ is a pipe fitting used to connect oil pipes. It is usually short in length (usually 0.25 meters to 2 meters), large in diameter (usually 2-6 inches), and thin in wall thickness (usually 4-12 mm). It is widely used in drilling, oil production, transportation and other fields in the oil and gas industries to connect, reduce shock, and guide flow. At present, friction welding is mainly used to complete the processing of short joint oil pipes. In the actual processing process, the processing material is installed on the end of the friction welding equipment, and the friction welding equipment is started. During the process of driving the processing material to rotate rapidly, the processing material is moved slowly until the two processing materials are completely welded together. After cooling for a period of time, the welded material is removed, and finally the processing operation of the short joint oil pipe is completed. The overall operation is simple, but in the actual processing process, due to the extremely fast rotation speed in friction welding, a large number of sparks will be generated when the processing materials are in contact with each other. These sparks fly everywhere, posing certain safety hazards. After the friction welding is completed, it is necessary to manually check the surface of the short joint oil pipe to detect the connection effect of the short joint oil pipe after welding. However, at this time, the short joint oil pipe needs to be cooled for a long time before the corresponding operation can be performed, which greatly delays the overall processing efficiency. In the friction welding of the short joint oil pipe, due to the high friction welding temperature, an oxide film will exist on the surface of the short joint oil pipe welding during the rapid cooling of the short joint oil pipe. In the subsequent detection process, it is necessary to manually remove the oxide film, which is time-consuming and laborious.

[0003] Therefore, we propose a friction welding device and method for a short joint oil pipe to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a friction welding device and method for a short joint oil pipe.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A friction welding device for a short joint oil pipe comprises a base, a fixed workbench is fixedly connected to the upper side of the base, a movable workbench is also slidably installed on the upper side of the base, three-jaw chucks are rotatably installed on the side walls of the fixed workbench and the movable workbench, a protective cylinder is installed between the fixed workbench and the movable workbench, a detection component is installed in the protective cylinder, the detection component comprises a plurality of through grooves opened on the side walls on both sides of the protective cylinder, a threaded cylinder is rotatably connected in each of the through grooves, a slide plate is threadedly sleeved on the outer side of the threaded cylinder, the slide plate and the through groove are slidably connected, a plurality of slide plates on the same side are commonly fixedly connected with a threaded ring, a connecting ring is rotatably connected to the side wall of the threaded ring, a movable ring is threadedly connected in the inner side of the threaded ring, a fixed ring is fixedly connected to the outer side of the movable ring, a third spring is fixedly connected between the fixed ring and the connecting ring, a plurality of first pressure sensors are circumferentially fixedly connected to the outer side of the fixed ring, a plurality of the first pressure sensors are fixedly connected to a cylinder, and a control component for controlling the rotation of the threaded cylinder is installed outside the three-jaw chuck.

[0006] As another technical solution, the control component includes a rotating ring rotatably mounted on the outside of the three-jaw chuck, the outer side of the rotating ring is circumferentially opened with a plurality of grooves, each of the grooves is rotatably connected with a first connecting rod, one end of the first connecting rod extends to a threaded cylinder, the first connecting rod is located in the threaded cylinder and one end is fixedly connected with a square block, the outer side of the first connecting rod is fixedly connected with a first gear, each of the grooves is slidably connected with a first rack, the first rack and the first gear are meshed, the outer side of the first rack is fixedly connected with a first connecting plate, the outer side of the first connecting plate is fixedly connected with a moving arc plate, a plurality of second connecting rods are slidably mounted on the outer side of the three-jaw chuck, the outer side of each of the second connecting rods is fixedly connected with a sleeve, the outer side of the sleeve is fixedly connected with a control arc plate, a second spring is fixedly connected to the bottom of the threaded cylinder, and a positioning component is installed in the protective cylinder.

[0007] As another technical solution, the positioning assembly includes a plurality of third connecting rods rotatably installed in a protective tube, the outer side of each of the third connecting rods is fixedly connected to a third gear, the outer side of the threaded tube is fixedly connected to a second gear, the second gear and the third gear are meshed, the outer side of each of the third connecting rods is fixedly connected to a fourth gear, a fourth rack is slidably connected in the protective tube, the fourth rack and the fourth gear are meshed, the outer side of the fourth rack is fixedly connected to a second connecting plate, the outer side of the second connecting plate is fixedly connected to a fourth connecting rod, the outer side of the fourth connecting rod is slidably connected to the third connecting plate, and a fourth spring is fixedly connected between the third connecting plate and the second connecting plate.

[0008] As another technical solution, a knocking assembly is installed in the protective cylinder, and the knocking assembly includes a fifth connecting rod slidably installed in the cylinder, a fourth connecting plate is fixedly connected to the outer side of the fifth connecting rod, a first spring is fixedly connected between the fourth connecting plate and the cylinder, and a plurality of round rods are fixedly connected circumferentially in the protective cylinder.

[0009] As another technical solution, the outer surface of the third connecting plate is roughened.

[0010] As another technical solution, one end of the fifth connecting rod is a smooth arc.

[0011] As another technical solution, a plurality of shock absorbers are fixedly mounted on the lower side of the base, and a rubber pad is fixedly connected to the lower side of the plurality of shock absorbers.

[0012] A method for friction welding a short joint oil pipe according to the claim, comprising the following steps: S1. Install the processed raw material in the three-jaw chuck; S2, the three-jaw chuck drives the processed material to rotate rapidly, and drives the movable workbench to move, and starts friction welding; S3, after the friction welding is completed, cooling; S4. Remove the processed short joint oil pipe and inspect it.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, during the friction welding process, the protective tube is always located between the fixed workbench and the movable workbench, that is, the protective tube is always located outside the abutting surfaces of the two processed raw materials. During the friction welding, the generated sparks are always located in the protective tube, which reduces the possibility of sparks flying around and improves the processing safety; 2. In the present invention, after the friction welding is completed, the processed short joint oil pipe can be automatically positioned, and then under the action of the cylinder, the cylinder can form a simple friction operation on the surface of the short joint, forming a cleaning operation of the oxide film on the surface of the short joint oil pipe; 3. In the present invention, after the cylinder as a whole and the short joint oil pipe abut against each other, they will rotate relative to the short joint oil pipe, thus causing the first pressure sensor to send out a corresponding electrical signal. During this process, the electrical signal sent out by the first pressure sensor can be observed. If the electrical signal sent out by the first pressure sensor suddenly increases, it means that a large protrusion appears on the side wall of the short joint oil pipe. If the electrical signal sent out by the first pressure sensor suddenly decreases, it means that a large depression appears on the side wall of the short joint oil pipe, thereby completing the detection operation of the side wall of the short joint oil pipe; 4. In the present invention, with the cooperation of the knocking assembly, a knocking effect on the short joint oil pipe can be formed. During this process, the electrical signal emitted by the first pressure sensor can continue to be observed. If the electrical signal emitted by the first pressure sensor is abnormal, it means that cracks appear on the side wall of the processed short joint oil pipe, and the processing effect is poor. After the inspection and cleaning operations on the side wall of the short joint oil pipe are completed, the protective tube is moved to remove the square block from the threaded tube, and then the welded short joint oil pipe is taken out to observe whether cracks appear in other positions of the short joint oil pipe after knocking, thereby completing the all-round detection effect of the short joint oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the connection between the three-jaw chuck and the rotating ring in the present invention; Figure 3 A schematic diagram of the connection between the three-jaw chuck and the rotating ring in the present invention at another angle; Figure 4 It is a schematic diagram of the connection between the control arc plate and the movable arc plate in the present invention; Figure 5 It is a schematic diagram of the unfolding connection of the sleeve and the second connecting rod in the present invention; Figure 6 It is a schematic diagram of the structure of the protection tube in the present invention; Figure 7 It is a connection diagram of the second gear and the third gear in the present invention; Figure 8 It is a cross-sectional connection schematic diagram of the threaded barrel in the present invention; Fig. 9 It is a schematic diagram of the connection between the threaded ring and the movable ring in the present invention; Fig.10 It is a connection diagram of the threaded ring and the movable ring in the present invention from another angle; Fig.11 It is a cross-sectional connection diagram of the protection tube in the present invention; Fig.12 It is a schematic structural diagram of the fifth connecting rod in the present invention.

[0015] In the figure: 1 base, 2 fixed workbench, 3 movable workbench, 4 three-jaw chuck, 5 round rod, 6 rotating ring, 7 first connecting rod, 8 square block, 9 movable arc plate, 10 control arc plate, 11 groove, 12 first gear, 13 first rack, 14 first connecting plate, 15 sleeve, 16 second connecting rod, 17 first spring, 18 protection cylinder, 19 through groove, 20 threaded cylinder, 21 second spring, 22 slide plate, 23 threaded ring, 24 connecting ring, 25 movable ring, 26 fixed ring, 27 third spring, 28 first pressure sensor, 29 cylinder, 30 third connecting rod, 31 second gear, 32 third gear, 33 fourth gear, 34 fourth rack, 35 second connecting plate, 36 fourth connecting rod, 37 third connecting plate, 38 fourth spring, 39 fifth connecting rod, 40 fourth connecting plate. DETAILED DESCRIPTION

[0016] See also Figure 1-Figure 12 A friction welding device for a short joint oil pipe comprises a base 1, a fixed workbench 2 is fixedly connected to the upper side of the base 1, a mobile workbench 3 is also slidably installed on the upper side of the base 1, three-jaw chucks 4 are rotatably installed on the side walls of the fixed workbench 2 and the mobile workbench 3, a protective tube 18 is installed between the fixed workbench 2 and the mobile workbench 3, a plurality of shock absorbers are fixedly installed on the lower side of the base 1, and rubber pads are fixedly connected to the lower sides of the plurality of shock absorbers; First of all, the three-jaw chuck refers to a machine tool accessory that uses the radial movement of three movable jaws evenly distributed on the chuck body to clamp and position the workpiece. The three-jaw chuck consists of a chuck body, movable jaws and a jaw drive mechanism. The fixed worktable 2 and the movable worktable 3 are both equipped with control motors, and the output end of the control motor is fixedly connected to the chuck body. Secondly, a threaded rod is installed inside the base 1, and the movable worktable 3 is threadedly connected to the threaded rod, and the movable worktable 3 is slidably connected to the base 1. Then, when the short joint oil pipe needs to be friction welded, the processed original The material is placed between the three movable jaws, and then the jaw driving mechanism is started to clamp the processed material and install it in the three-jaw chuck 4, and the control motor is started to drive the three-jaw chuck 4 to rotate, and the three-jaw chuck 4 drives the processed material to rotate rapidly, and then the threaded rod is rotated, and the movable workbench 3 is driven to move through the threaded rod. When the two processed materials are against each other, the movable workbench 3 continues to move until the two processed materials are processed into short joint oil pipes, thereby completing the friction welding operation of the short joint oil pipe. The above are all existing technologies and no redundant description is made; like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 9 , Fig.10A detection assembly is installed in the protective cylinder 18, and the detection assembly includes a plurality of through grooves 19 opened on the side walls on both sides of the protective cylinder 18, a threaded cylinder 20 is rotatably connected in each through groove 19, a slide plate 22 is threadedly sleeved on the outer side of the threaded cylinder 20, the slide plate 22 and the through groove 19 are slidably connected, a plurality of slide plates 22 on the same side are commonly fixedly connected with a threaded ring 23, a connecting ring 24 is rotatably connected to the side wall of the threaded ring 23, a moving ring 25 is threadedly connected to the inner side of the threaded ring 23, a fixed ring 26 is fixedly connected to the outer side of the moving ring 25, a third spring 27 is fixedly connected between the fixed ring 26 and the connecting ring 24, a plurality of first pressure sensors 28 are fixedly connected to the outer circumferential direction of the fixed ring 26, and the plurality of first pressure sensors 28 are all fixedly connected to a cylinder 29, a control assembly for controlling the rotation of the threaded cylinder 20 is installed outside the three-jaw chuck 4, the control assembly includes a rotating ring 6 rotatably installed on the outer side of the three-jaw chuck 4, and the outer circumferential direction of the rotating ring 6 is A plurality of grooves 11 are provided, each of which is rotatably connected with a first connecting rod 7, one end of the first connecting rod 7 extends to the threaded barrel 20, one end of the first connecting rod 7 located in the threaded barrel 20 is fixedly connected with a square block 8, the outer side of the first connecting rod 7 is fixedly connected with a first gear 12, each of which is slidably connected with a first rack 13, the first rack 13 is meshed with the first gear 12, the outer side of the first rack 13 is fixedly connected with a first connecting plate 14, the outer side of the first connecting plate 14 is fixedly connected with a movable arc plate 9, a plurality of second connecting rods 16 are slidably installed on the outer side of the three-jaw chuck 4, the outer side of each second connecting rod 16 is fixedly connected with a sleeve 15, the outer side of the sleeve 15 is fixedly connected with a control arc plate 10, a second spring 21 is fixedly connected to the bottom of the threaded barrel 20, and the outer surface of the third connecting plate 37 is roughened, which can better form the clamping operation related to the short joint; First, the inner circle of the threaded barrel 20 and the square block 8 are both regular polygons. Secondly, the second connecting rod 16 slides through the chuck body, and the second connecting rod 16 is fixedly connected to the movable claw. Then, after the processing material is installed, the protective barrel 18 is moved to make the square block 8 enter the corresponding threaded barrel 20, and the square block 8 and the second spring 21 are abutted, thereby causing the protective barrel 18 to be located in the middle position between the mobile workbench 3 and the fixed workbench 2. During the friction welding process, the mobile workbench 3 moves toward the direction close to the fixed workbench 2, and the square block 8 is relative to the protective barrel 18. The cylinder 18 moves, the square block 8 and the second spring 21 abut against each other, thereby compressing the second spring 21. During this process, the protective cylinder 18 is always located between the fixed workbench 2 and the movable workbench 3. During the friction welding process, since the three-jaw chuck 4 and the rotating ring 6 are in a state of rotational connection, the protective cylinder 18 will not rotate. In addition, during the friction welding process, the protective cylinder 18 is always located outside the processing surfaces of the two processing materials abutting against each other. During the friction welding process, the sparks generated are always located in the protective cylinder 18, reducing the possibility of sparks flying everywhere. Then after the friction welding is completed, it is cooled for a period of time, and then the movable claw is moved by starting the claw driving mechanism, so that the movable claw and the processed short joint oil pipe are disconnected, and the movable claw drives the sleeve 15 and the control arc plate 10 to move through the second connecting rod 16, and the control arc plate 10 and the movable arc plate 9 are abutted and drive the movable arc plate 9 to move, and the movable arc plate 9 drives the first rack 13 to move through the first connecting plate 14, and the first rack 13 drives the first gear 12 to rotate, and the first gear 12 drives the square block 8 to rotate through the first connecting rod 7, and the square block 8 drives the threaded barrel 20 to rotate. Since the threaded barrel 20 and the slide plate 22 are threadedly connected, and the slide plate 22 and the through groove 19 are slidably connected, the rotating threaded barrel 20 will drive the slide plate 22 to move, so that Figure 6 Based on the direction, the left slide 22 moves to the right, and the right slide 22 moves to the left, that is, the slides 22 on the left and right sides move in the direction close to each other, and the moving slide 22 drives the threaded ring 23 to move, and the threaded ring 23 drives the fixed ring 26 to move through the connecting ring 24 and the third spring 27, and the fixed ring 26 drives the first pressure sensor 28 and the cylinder 29 to move in the direction close to the short joint oil pipe. In the above working process, when the cylinder 29 and the side wall of the short joint oil pipe are against each other, under the obstruction of the short joint oil pipe, the cylinder 29 and the fixed ring 26 will stop moving with the threaded ring 23 as a whole. Since the cylinder 29 and the short joint oil pipe are against each other, the first pressure sensor 28 will send a corresponding electrical signal. At this time, since the threaded ring 23 and the moving ring 25 are threadedly connected, the third spring 27 will be compressed. 27, and the movable ring 25 will rotate relative to the short joint oil pipe, and the movable ring 25 drives the first pressure sensor 28 and the cylinder 29 to rotate. During this process, it can be observed that the first pressure sensor 28 sends out an electrical signal. If the electrical signal sent by the first pressure sensor 28 suddenly becomes larger, it means that a larger protrusion appears on the side wall of the short joint oil pipe. If the electrical signal sent by the first pressure sensor 28 suddenly becomes smaller, it means that a larger depression appears on the side wall of the short joint oil pipe, thereby completing the detection operation of the side wall of the short joint oil pipe. In addition, since the outer surface of the cylinder 29 is smoothly set, not only will it not damage the side wall of the short joint oil pipe, but in the process that the cylinder 29 follows the fixed ring 26 to rotate, the cylinder 29 can also form a simple friction operation on the surface of the short joint, thereby forming a cleaning operation for the oxide film on the surface of the short joint oil pipe.

[0017] like Figure 7A positioning assembly is installed in the protective cylinder 18, and the positioning assembly includes a plurality of third connecting rods 30 rotatably installed in the protective cylinder 18, and a third gear 32 is fixedly connected to the outer side of each third connecting rod 30, and a second gear 31 is fixedly connected to the outer side of the threaded cylinder 20, and the second gear 31 and the third gear 32 are meshed, and a fourth gear 33 is fixedly connected to the outer side of each third connecting rod 30, and a fourth rack 34 is slidably connected in the protective cylinder 18, and the fourth rack 34 and the fourth gear 33 are meshed, and a second connecting plate 35 is fixedly connected to the outer side of the fourth rack 34, and a fourth connecting rod 36 is fixedly connected to the outer side of the second connecting plate 35, and a third connecting plate 37 is slidably connected to the outer side of the fourth connecting rod 36, and a fourth spring 38 is fixedly connected between the third connecting plate 37 and the second connecting plate 35, and the outer surface of the third connecting plate 37 is rough; During the rotation of the threaded barrel 20, the rotating threaded barrel 20 will also drive the third connecting rod 30 to rotate through the second gear 31 and the third gear 32, and the third connecting rod 30 will drive the fourth gear 33 to rotate, and the fourth gear 33 will drive the fourth rack 34 to move in the direction close to the short joint oil pipe, and the fourth rack 34 will drive the third connecting plate 37 to move in the direction close to the short joint oil pipe through the second connecting plate 35 and the fourth spring 38 until the third connecting plate 37 and the short joint oil pipe are against each other. At this time, under the obstruction of the short joint oil pipe, the third connecting plate 37 stops moving, thereby compressing the fourth spring 38, which causes the processed short joint oil pipe to be located at the center of the protective barrel 18, and because the outer surface of the third connecting plate 37 is rough, the third connecting plate 37 will clamp the processed short joint oil pipe, and can make the processed short joint oil pipe located at the center of the protective barrel 18, thereby better forming the detection and cleaning operation of the short joint oil pipe.

[0018] like Fig.10 , Fig.11 , Fig.12 A striking assembly is installed in the protection tube 18, and the striking assembly includes a fifth connecting rod 39 slidably installed in the cylinder 29, a fourth connecting plate 40 is fixedly connected to the outer side of the fifth connecting rod 39, a first spring 17 is fixedly connected between the fourth connecting plate 40 and the cylinder 29, and a plurality of round rods 5 are fixedly connected in the circumferential direction of the protection tube 18; First, during the rotation of the fixing ring 26 relative to the protection cylinder 18, the fixing ring 26 drives the cylinder 29 to rotate through the first pressure sensor 28, and the cylinder 29 drives the fifth connecting rod 39 to rotate. Since the end of the fifth connecting rod 39 is a smooth arc, and the fifth connecting rod 39 always abuts against the side wall of the protection cylinder 18 or the round rod 5, the fifth connecting rod 39 follows the rotation of the cylinder 29. Under the cooperation of the first spring 17, the fifth connecting rod 39 moves relative to the cylinder 29. When the moving fifth connecting rod 39 abuts against the side wall of the short joint oil pipe, It will form a knocking effect on the side wall of the short joint oil pipe. During this process, the electrical signal emitted by the first pressure sensor 28 can continue to be observed. If the electrical signal emitted by the first pressure sensor 28 is abnormal, it means that cracks appear on the side wall of the processed short joint oil pipe, and the processing effect is poor. After the inspection and cleaning operations on the side wall of the short joint oil pipe are completed, the protective cylinder 18 is moved to remove the square block 8 from the threaded cylinder 20, and then the welded short joint oil pipe is taken out to observe whether cracks appear in other positions of the short joint oil pipe after knocking, thereby completing the all-round detection effect of the short joint oil pipe.

[0019] A method for friction welding a short joint oil pipe comprises the following steps: S1, installing the processing raw material in the three-jaw chuck 4; S2, the three-jaw chuck 4 drives the processed material to rotate rapidly, and drives the movable workbench 3 to move, and starts friction welding; S3, after the friction welding is completed, cooling; S4. Remove the processed short joint oil pipe and inspect it.

[0020] During the use of the present invention, when the friction welding operation of the short joint oil pipe is required, the processing material is placed between the three movable jaws, and then the jaw driving mechanism is started, the processing material is clamped and installed in the three-jaw chuck 4, and the control motor is started to drive the three-jaw chuck 4 to rotate, and the three-jaw chuck 4 drives the processing material to rotate rapidly, and then the threaded rod is rotated, and the movable workbench 3 is driven to move by the threaded rod. When the two processing materials are against each other, the movable workbench 3 continues to move until the two processing materials are processed into the short joint oil pipe, thereby completing the friction welding operation of the short joint oil pipe. The above are all existing technologies and no redundant description is made; After the processing raw materials are installed, the protective cylinder 18 is moved to make the square block 8 enter the corresponding threaded cylinder 20, and the square block 8 and the second spring 21 are against each other, thereby causing the protective cylinder 18 to be located in the middle position between the movable workbench 3 and the fixed workbench 2. During the friction welding process, the movable workbench 3 moves toward the fixed workbench 2, and the square block 8 moves relative to the protective cylinder 18. The square block 8 and the second spring 21 are against each other, thereby compressing the second spring 21. During this process, the protective cylinder 18 is always located in the middle of the fixed workbench 2 and the movable workbench 3. During the friction welding process, since the three-jaw chuck 4 and the rotating ring 6 are in a state of rotational connection, the protective cylinder 18 will not rotate, and during the friction welding process, the protective cylinder 18 is always located on the outside of the processing surfaces of the two processing raw materials against each other. During friction welding, the sparks generated are always located in the protective cylinder 18, reducing the possibility of sparks flying everywhere; Then after the friction welding is completed, it is cooled for a period of time, and then the movable claw is moved by starting the claw driving mechanism, so that the movable claw and the processed short joint oil pipe are disconnected, and the movable claw drives the sleeve 15 and the control arc plate 10 to move through the second connecting rod 16, and the control arc plate 10 and the movable arc plate 9 are abutted and drive the movable arc plate 9 to move, and the movable arc plate 9 drives the first rack 13 to move through the first connecting plate 14, and the first rack 13 drives the first gear 12 to rotate, and the first gear 12 drives the square block 8 to rotate through the first connecting rod 7, and the square block 8 drives the threaded barrel 20 to rotate. Since the threaded barrel 20 and the slide plate 22 are threadedly connected, and the slide plate 22 and the through groove 19 are slidably connected, the rotating threaded barrel 20 will drive the slide plate 22 to move, so that Figure 6Based on the direction, the left slide 22 moves to the right, and the right slide 22 moves to the left, that is, the slides 22 on the left and right sides move in the direction close to each other, and the moving slide 22 drives the threaded ring 23 to move, and the threaded ring 23 drives the fixed ring 26 to move through the connecting ring 24 and the third spring 27, and the fixed ring 26 drives the first pressure sensor 28 and the cylinder 29 to move in the direction close to the short joint oil pipe. In the above working process, when the cylinder 29 and the side wall of the short joint oil pipe are against each other, under the obstruction of the short joint oil pipe, the cylinder 29 and the fixed ring 26 will stop moving with the threaded ring 23 as a whole. Since the cylinder 29 and the short joint oil pipe are against each other, the first pressure sensor 28 will send a corresponding electrical signal. At this time, since the threaded ring 23 and the moving ring 25 are threadedly connected, the third spring 27 will be compressed. 27, and the moving ring 25 will rotate relative to the short joint oil pipe, and the moving ring 25 drives the first pressure sensor 28 and the cylinder 29 to rotate. During this process, the first pressure sensor 28 can be observed to send out an electrical signal. If the electrical signal sent out by the first pressure sensor 28 suddenly becomes larger, it means that a large protrusion appears on the side wall of the short joint oil pipe. If the electrical signal sent out by the first pressure sensor 28 suddenly becomes smaller, it means that a large depression appears on the side wall of the short joint oil pipe, thereby completing the detection operation of the side wall of the short joint oil pipe. In addition, since the outer surface of the cylinder 29 is smooth, not only will the side wall of the short joint oil pipe not be damaged, but in the process of the cylinder 29 following the fixed ring 26 to rotate, the cylinder 29 can also form a simple friction operation on the surface of the short joint, thereby forming a cleaning operation for the oxide film on the surface of the short joint oil pipe. During the rotation of the threaded barrel 20, the rotating threaded barrel 20 will also drive the third connecting rod 30 to rotate through the second gear 31 and the third gear 32, and the third connecting rod 30 will drive the fourth gear 33 to rotate, and the fourth gear 33 will drive the fourth rack 34 to move in the direction close to the short joint oil pipe, and the fourth rack 34 will drive the third connecting plate 37 to move in the direction close to the short joint oil pipe through the second connecting plate 35 and the fourth spring 38 until the third connecting plate 37 and the short joint oil pipe are against each other. At this time, under the obstruction of the short joint oil pipe, the third connecting plate 37 stops moving, thereby compressing the fourth spring 38, thereby causing the processed short joint oil pipe to be located at the center of the protective barrel 18, and because the outer surface of the third connecting plate 37 is rough, the third connecting plate 37 will clamp the processed short joint oil pipe, and can make the processed short joint oil pipe located at the center of the protective barrel 18, thereby better forming the detection and cleaning operation of the short joint oil pipe; During the rotation of the fixing ring 26 relative to the protection cylinder 18, the fixing ring 26 drives the cylinder 29 to rotate through the first pressure sensor 28, and the cylinder 29 drives the fifth connecting rod 39 to rotate. Since the end of the fifth connecting rod 39 is a smooth arc, and the fifth connecting rod 39 always abuts against the side wall of the protection cylinder 18 or the round rod 5, the fifth connecting rod 39 follows the rotation of the cylinder 29. Under the cooperation of the first spring 17, the fifth connecting rod 39 moves relative to the cylinder 29. When the moving fifth connecting rod 39 abuts against the side wall of the short joint oil pipe, a The knocking effect of the side walls of the paired short joint oil pipes. During this process, the electrical signal emitted by the first pressure sensor 28 can continue to be observed. If the electrical signal emitted by the first pressure sensor 28 is abnormal, it means that cracks appear on the side walls of the processed short joint oil pipes, and the processing effect is poor. After the inspection and cleaning operations on the side walls of the short joint oil pipes are completed, the protective cylinder 18 is moved to remove the square block 8 from the threaded cylinder 20, and then the welded short joint oil pipes are taken out to observe whether cracks appear in other positions of the short joint oil pipes after knocking, thereby completing the all-round inspection effect of the short joint oil pipes.

Claims

1. A friction welding device for a short joint oil pipe, comprising a base (1), characterized in that: A fixed workbench (2) is fixedly connected to the upper side of the base (1), and a movable workbench (3) is also slidably mounted on the upper side of the base (1). A three-jaw chuck (4) is rotatably mounted on the side walls of the fixed workbench (2) and the movable workbench (3). A protective tube (18) is mounted between the fixed workbench (2) and the movable workbench (3). A detection component is mounted in the protective tube (18). The detection component comprises a plurality of through grooves (19) opened on the side walls of both sides of the protective tube (18). A threaded tube (20) is rotatably connected to each through groove (19). A slide plate (22) is threadedly sleeved on the outer side of the threaded tube (20). The slide plate (22) and the through groove (19) are connected to each other. Sliding connection, multiple slide plates (22) on the same side are commonly fixedly connected to a threaded ring (23), the side wall of the threaded ring (23) is rotatably connected to a connecting ring (24), the threaded ring (23) is internally threadedly connected to a moving ring (25), the outer side of the moving ring (25) is fixedly connected to a fixed ring (26), a third spring (27) is fixedly connected between the fixed ring (26) and the connecting ring (24), the outer side of the fixed ring (26) is circumferentially fixedly connected to a plurality of first pressure sensors (28), the plurality of first pressure sensors (28) are all fixedly connected to a cylinder (29), and a control component for controlling the rotation of the threaded cylinder (20) is installed outside the three-jaw chuck (4).

2. The friction welding device for a short joint oil pipe according to claim 1, characterized in that: The control assembly comprises a rotating ring (6) rotatably mounted on the outside of the three-jaw chuck (4), the outer side of the rotating ring (6) is provided with a plurality of grooves (11) in the circumferential direction, a first connecting rod (7) is rotatably connected in each of the grooves (11), one end of the first connecting rod (7) extends to the threaded barrel (20), one end of the first connecting rod (7) located in the threaded barrel (20) is fixedly connected to a square block (8), the outer side of the first connecting rod (7) is fixedly connected to a first gear (12), each of the grooves (11) is slidably connected to a first rack (13), the first rack (13) 3) is meshed with a first gear (12), the first rack (13) is fixedly connected to a first connecting plate (14) on the outer side, the first connecting plate (14) is fixedly connected to a movable arc plate (9) on the outer side, a plurality of second connecting rods (16) are slidably mounted on the outer side of the three-jaw chuck (4), each of the second connecting rods (16) is fixedly connected to a sleeve (15) on the outer side, the sleeve (15) is fixedly connected to a control arc plate (10) on the outer side, a second spring (21) is fixedly connected to the inner bottom of the threaded cylinder (20), and a positioning assembly is mounted in the protective cylinder (18).

3. The friction welding device for a short joint oil pipe according to claim 2, characterized in that: The positioning assembly comprises a plurality of third connecting rods (30) rotatably mounted in the protective tube (18), the outer side of each of the third connecting rods (30) being fixedly connected to a third gear (32), the outer side of the threaded tube (20) being fixedly connected to a second gear (31), the second gear (31) and the third gear (32) being meshed with each other, the outer side of each of the third connecting rods (30) being fixedly connected to a fourth gear (33), the protective tube (18) being slidably connected to a fourth rack (34), the fourth rack (34) and the fourth gear (33) being meshed with each other, the outer side of the fourth rack (34) being fixedly connected to a second connecting plate (35), the outer side of the second connecting plate (35) being fixedly connected to a fourth connecting rod (36), the outer side of the fourth connecting rod (36) being slidably connected to a third connecting plate (37), and a fourth spring (38) being fixedly connected between the third connecting plate (37) and the second connecting plate (35).

4. The friction welding device for a short joint oil pipe according to claim 3, characterized in that: A striking assembly is installed in the protective tube (18), and the striking assembly comprises a fifth connecting rod (39) slidably installed in the cylinder (29), a fourth connecting plate (40) is fixedly connected to the outer side of the fifth connecting rod (39), a first spring (17) is fixedly connected between the fourth connecting plate (40) and the cylinder (29), and a plurality of round rods (5) are fixedly connected in the circumferential direction of the inner side of the protective tube (18).

5. The friction welding device for a short joint oil pipe according to claim 4, characterized in that: The outer surface of the third connecting plate (37) is rough.

6. The friction welding device for a short joint oil pipe according to claim 5, characterized in that: One end of the fifth connecting rod (39) is a smooth arc.

7. The friction welding device for a short joint oil pipe according to claim 6, characterized in that: A plurality of shock absorbers are fixedly mounted on the lower side of the base (1), and a rubber pad is fixedly connected to the lower side of the plurality of shock absorbers.

8. A method for friction welding a short joint oil pipe according to claim 7, characterized in that: The following steps are involved: S1, installing the processing material in the three-jaw chuck (4); S2, causing the three-jaw chuck (4) to drive the processed material to rotate rapidly, and driving the movable workbench (3) to move, and starting friction welding; S3, after the friction welding is completed, cooling; S4. Remove the processed short joint oil pipe and inspect it.

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