Steel pipe welding forming device

Abstract

The invention provides a steel pipe welding forming device, and belongs to the technical field of steel pipe welding machining equipment, the steel pipe welding forming device comprises a machining table, a forming conveying mechanism and a blowing mechanism are arranged at the upper end of the machining table, a protective frame and a steel pipe blank are arranged on one side of the blowing mechanism, and the protective frame is connected with a welder; the extrusion welding assembly is used for welding the steel pipe blank; the pressurizing assembly is used for adjusting the extrusion welding assembly; the vibration assembly is used for knocking the steel pipe blank; the device has the beneficial effects that the heat exchange area can be increased through the spiral grooves, and the air pump can be triggered to work along with temperature rise, so that the roller distance is changed, the extrusion force of the extrusion rollers on a steel pipe blank is reduced, molten metal is prevented from being excessively extruded out of a weld joint, the welding quality is improved, meanwhile, the steel pipe blank can be knocked and vibrated in a reciprocating mode through the vibration blocks, and the welding quality is improved. Therefore, weld beading formed by overflow is reduced, and the compactness of weld joints is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe welding and processing equipment, and more particularly, to a steel pipe welding and forming device. Background Art

[0002] High-frequency straight-seam welded steel pipes can be divided into straight-seam high-frequency resistance welded steel pipes and straight-seam high-frequency induction welded steel pipes according to different high-frequency welding processes. The forming process generally adopts the roll bending and cold forming method. High-frequency straight-seam welded steel pipes generally have a relatively small production caliber, usually below an outer diameter of 660 mm or 26 inches.

[0003] In actual use, the steel pipe needs to be conveyed forward by a transmission mechanism such as a motor. After being extruded and formed by a forming device, the gap of the steel pipe is welded by a welding device. Usually, water cooling is also required for cooling treatment. During welding, one or a group of impedance devices rotate near the center of the induction coil inside the pipe blank, forming an electromagnetic induction circuit with the opening of the pipe blank. Utilizing the skin effect, the high-frequency electrical energy is concentrated on the surface layer of the welded part; with the help of the proximity effect, the position and range of the high-frequency current flow path are controlled, so that a strong and concentrated thermal effect is generated at the edge of the opening of the pipe blank, quickly heating the edge of the weld to the required welding temperature. When the steel at the edge of the weld reaches the molten state, it is extruded by an extrusion roller. Under the extrusion action, the molten metal at the molten state realizes grain boundary joining. At this time, metal atoms diffuse and penetrate each other to form common metal grains. After cooling, a firm butt weld will be formed, and the welding slag is scraped off after the steel pipe welding is completed. In the prior art, the distance between the traditional extrusion rollers is usually fixed. When the temperature rises, the fluidity of the molten metal increases. If the extrusion force remains unchanged, it is easy to cause the molten metal to be over-extruded to form weld beads, increasing the risk of over-extrusion. Most traditional mechanical adjustment methods are adjusted manually or by hydraulic drive. This adjustment method has a lag response and is not convenient for timely matching the temperature change, which may lead to an increase in the incidence of weld beads. Moreover, during high-frequency welding, the welding thermal stress may cause microcracks or pores in the weld. If the stress is not eliminated in time or the flow of the molten metal is not promoted, it may lead to insufficient weld density, affecting the welding quality and making it difficult to meet the requirements of harsh scenarios such as high-pressure pipelines. How to invent a steel pipe welding and forming device to solve these problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0004] To make up for the above deficiencies, the present invention provides a steel pipe welding and forming device, aiming to solve the problems of being inconvenient to timely match the temperature change, which may lead to an increase in the incidence of weld beads, and not eliminating stress or promoting the flow of molten metal in time, which may lead to insufficient weld density and affect the welding quality.

[0005] The present invention is implemented as follows: The present invention provides a steel pipe welding and forming device, including a processing table. An forming conveying mechanism and a blowing mechanism are provided at the upper end of the processing table. A protective frame and a steel pipe blank are provided on one side of the blowing mechanism. The protective frame is connected with a welding machine, and further includes: An extrusion welding assembly, which is located inside the protective frame and is used for welding the steel pipe blank; A pressurizing assembly, which is connected with the extrusion welding assembly and is used for adjusting the extrusion welding assembly; A vibration assembly, which is located inside the protective frame and is used for knocking the steel pipe blank.

[0006] Preferably, the blowing mechanism is located between the forming conveying mechanism and the protective frame. The forming conveying mechanism, the blowing mechanism and the protective frame are all fixedly connected to the upper end of the processing table. One side of the protective frame is fixedly connected with the welding machine. The welding machine is located between the protective frame and the blowing mechanism. The welding machine is sleeved outside the steel pipe blank. One end of the steel pipe blank is respectively in transmission connection with the blowing mechanism and the extrusion welding assembly. A rolling roller is provided inside the protective frame and is located directly above the steel pipe blank.

[0007] Preferably, the extrusion welding assembly includes a fixed frame. A sliding rod is fixedly connected inside the fixed frame. Moving blocks are slidably connected to both ends of the sliding rod symmetrically about the center line. One end of the moving block is fixedly connected with a driving motor. The driving motor is slidably connected to the inner wall of the fixed frame. One end of the driving motor is fixedly connected with an extrusion roller.

[0008] Preferably, a fixed cylinder is fixedly connected to the upper side wall of the driving motor. A support rod and a pressure sensor are respectively provided inside the fixed cylinder. The support rod is slidably limited to the inner wall of the fixed cylinder. The pressure sensor is fixedly connected with the driving motor. One end of the support rod located outside the fixed cylinder is fixedly connected with a support plate. A return spring is sleeved on the outer wall of the support rod. Both ends of the return spring are respectively fixedly connected with the support plate and the side wall of the fixed cylinder. A plurality of ball bearings distributed in a circumferential array are rotatably connected to the end of the support plate away from the support rod.

[0009] Preferably, a chamfer is provided at the upper corner of the extrusion roller. The cross section of the extrusion roller is trapezoidal. A plurality of spiral grooves distributed in a circumferential array are provided on the outer wall of the lower end of the extrusion roller. A piston cavity is provided inside the extrusion roller. A piston plate is slidably connected to the inner wall of the piston cavity.

[0010] Preferably, the extrusion welding assembly also includes a ring, the inner diameter of the ring is larger than the outer diameter of the support plate, the ring is located above the support plate, and the upper side wall of the ring is fixedly connected to a plurality of piston rods distributed in a circular array, the end of the piston rod away from the ring passes through the inner wall of the piston cavity and is fixedly connected to the piston plate, the outer wall of the piston rod is sleeved with a telescopic spring, and the two ends of the telescopic spring are respectively fixedly connected to the ring and the side wall of the extrusion roller.

[0011] Preferably, the pressurizing assembly includes an air cylinder and an air pump, the side wall of the air cylinder is fixedly connected with a connecting pipe, the air pump is fixedly connected to the side wall of the fixed frame, the end of the connecting pipe away from the air cylinder passes through the side wall of the fixed frame and is fixedly connected to one end of the air pump, and the two ends of the air cylinder are slidably connected with adjustment rods.

[0012] Preferably, the adjusting rod is arranged in an "I" shape, and one end of the adjusting rod located outside the air cylinder is fixedly connected to the driving motor. The outer wall of the adjusting rod is sleeved with a buffer spring, and the two ends of the buffer spring are respectively fixedly connected to the inner wall of the air cylinder and the side wall of one end of the adjusting rod.

[0013] Preferably, the vibration assembly includes a fixed plate, the fixed plate is fixedly connected to one end of the fixed frame, the lower side wall of the fixed plate is fixedly connected to the air storage cylinder, the upper side wall of the fixed plate is fixedly connected with a vertical cylinder, the vertical cylinder is located between two extrusion rollers, and a movable column and two telescopic springs are provided inside the vertical cylinder, and the two ends of the telescopic spring are respectively fixedly connected to the side wall of one end of the movable column and the side wall of the fixed plate.

[0014] Preferably, the movable column is slidably connected to the inner wall of the vertical cylinder, one end of the movable column located outside the vertical cylinder is fixedly connected to a support plate, both sides of the support plate are fixedly connected to extrusion blocks, one end of the extrusion block is rotatably connected to a rolling ball, and the upper side wall of the support plate is fixedly connected to a vibration block, and the vibration block is located directly below the steel pipe blank.

[0015] The beneficial effects of the present invention are: 1. During the operation of the equipment, the spiral groove arranged under the extrusion roller can guide the coolant to flow spirally along the roller surface, thereby increasing the heat exchange area and taking away the heat transferred from the welding area to the roller body in time. When the temperature rises to a certain level, the gas inside the piston cavity expands and squeezes the extrusion piston plate, so that the piston rod drives the sleeve ring to move toward the fixed frame, and finally realizes the squeezing of the pressure sensor by the support rod. When the pressure of the end of the support rod on the pressure sensor exceeds the preset threshold, the air pump can be triggered to increase the air pressure inside the air storage cylinder, driving the two adjusting rods to move synchronously in opposite directions, so as to adjust the distance between the extrusion roller and the steel pipe billet, change the roller spacing, thereby reducing the squeezing force of the extrusion roller on the steel pipe billet, avoiding excessive extrusion of molten metal from the weld, and improving the quality of welding.

[0016] 2. While the extrusion roller rotates, the inner wall of the spiral groove at its lower end can extrude the inclined surface of the extrusion block, driving the support plate to move downward and separating the vibration block from the surface of the steel pipe blank. After the rolling ball separates from the side wall of the extrusion roller, the elastic recovery of the second telescopic spring can be used to quickly reset the vibration block, thereby realizing the reciprocating knocking vibration of the steel pipe blank. By vibrating, the surface tension of the molten metal is destroyed, promoting its aggregation towards the center of the weld, reducing overflow to form weld beads, improving the weld density, and the vibration energy can assist in eliminating welding stress, preventing weld cracks caused by uneven temperature, and discharging the air at the welding position, reducing the generation of pores. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic diagram of the overall left front side structure of a steel pipe welding and forming device provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the overall right rear side structure of a steel pipe welding and forming device provided by an embodiment of the present invention; Figure 3 is a schematic diagram of the welding device structure of a steel pipe welding and forming device provided by an embodiment of the present invention; Figure 4 is a schematic diagram of the rolling roller structure of a steel pipe welding and forming device provided by an embodiment of the present invention; Figure 5 is a schematic diagram of the extrusion welding assembly structure of a steel pipe welding and forming device provided by an embodiment of the present invention; Figure 6 is a schematic diagram of the extrusion roller structure of a steel pipe welding and forming device provided by an embodiment of the present invention; Figure 7 is a schematic diagram of the pressurizing assembly structure of a steel pipe welding and forming device provided by an embodiment of the present invention; Figure 8 is a schematic diagram of the half-section structure of the extrusion roller of a steel pipe welding and forming device provided by an embodiment of the present invention; Figure 9 is a schematic diagram of the half-section structure of the air storage cylinder of a steel pipe welding and forming device provided by an embodiment of the present invention; Figure 10It is a partial cross-sectional view of the vibration component structure of a steel pipe welding and forming device provided by an embodiment of the present invention.

[0019] In the figure: 1, processing table; 2, forming conveying mechanism; 3, air blowing mechanism; 4, welding torch; 5, protective frame; 6, extrusion welding assembly; 61, fixed frame; 62, extrusion roller; 621, chamfer; 622, spiral groove; 623, piston chamber; 63, drive motor; 64, first telescopic spring; 65, collar; 66, support plate; 661, ball; 67, sliding rod; 68, moving block; 69, fixed cylinder; 610, reset spring; 611, support rod; 612, piston rod; 613, piston plate; 614, pressure sensor; 7, rolling roller; 8, steel pipe blank; 9, pressurizing assembly; 91, air storage cylinder; 92, air pump; 93, adjusting rod; 94, connecting pipe; 95, buffer spring; 10, vibration assembly; 101, vibration block; 102, movable column; 103, vertical cylinder; 104, fixing plate; 105, support plate; 106, extrusion block; 107, second telescopic spring; 108, ball. Specific embodiments

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Example 1 Refer to Figures 1 - 10 , a steel pipe welding and forming device, including a processing table 1, a forming conveying mechanism 2 and an air blowing mechanism 3 are arranged at the upper end of the processing table 1, a protective frame 5 and a steel pipe blank 8 are arranged on one side of the air blowing mechanism 3, a welding torch 4 is connected to the protective frame 5, and further includes: An extrusion welding assembly 6, the extrusion welding assembly 6 is located inside the protective frame 5, and the extrusion welding assembly 6 is used for welding the steel pipe blank 8; A pressurizing assembly 9, the pressurizing assembly 9 is connected to the extrusion welding assembly 6, and the pressurizing assembly 9 is used for adjusting the extrusion welding assembly 6; A vibration assembly 10, the vibration assembly 10 is located inside the protective frame 5, and the vibration assembly 10 is used for knocking the steel pipe blank 8.

[0022] Furthermore, the blowing mechanism 3 is located between the forming and conveying mechanism 2 and the protective frame 5. The forming and conveying mechanism 2, the blowing mechanism 3 and the protective frame 5 are all fixedly connected to the upper end of the processing table 1. One side of the protective frame 5 is fixedly connected to the welder 4. The welder 4 is located between the protective frame 5 and the blowing mechanism 3. The welder 4 is sleeved on the outside of the steel tube blank 8. One end of the steel tube blank 8 is respectively transmission-connected to the blowing mechanism 3 and the extrusion welding assembly 6. A rolling roller 7 is provided inside the protective frame 5. The rolling roller 7 is located directly above the steel tube blank 8.

[0023] The forming process of the steel tube blank 8: The forming and conveying mechanism 2, the blowing mechanism 3 and the welder 4 in the present equipment are all prior arts, so the specific working principle will not be described in detail. In the process of forming the steel tube, the plate is first passed through the forming and conveying mechanism 2, so that the plate is curled into the steel tube blank 8 in this process. Before the steel tube blank 8 is heated and melted by the welder 4, the dust particles around the straight weld are blown and cleaned by the blowing mechanism 3 to ensure the subsequent welding quality. In addition, during the processing, multiple cooling water pipes will be set to cool and lubricate various components to prevent the equipment from overheating and affecting the performance and service life. The various electrical components in the equipment are powered by an external power supply and controlled by an external controller.

[0024] Reference Figures 3 - 9 , further; the extrusion welding assembly 6 includes a fixed frame 61, the interior of the fixed frame 61 is fixedly connected with a slide bar 67, the slide bar 67 is slidably connected with moving blocks 68 at both ends symmetrically about the center line, one end of the moving block 68 is fixedly connected with a drive motor 63, the drive motor 63 is slidably connected to the inner wall of the fixed frame 61, and one end of the drive motor 63 is fixedly connected to an extrusion roller 62; the upper side wall of the drive motor 63 is fixedly connected with a fixed cylinder 69, and the interior of the fixed cylinder 69 is respectively provided with a support rod 611 and a pressure sensor 614, the support rod 611 and the inner wall of the fixed cylinder 69 are limited and slided, the pressure sensor 614 is fixedly connected to the drive motor 63, and the support rod 6 One end located outside the fixed cylinder 69 is fixedly connected with a support plate 66, and the outer wall of the support rod 611 is sleeved with a return spring 610. The two ends of the return spring 610 are respectively fixedly connected to the support plate 66 and the side wall of the fixed cylinder 69. One end of the support plate 66 away from the support rod 611 is rotatably connected with a plurality of balls 661 distributed in a circular array; a chamfer 621 is provided at the upper corner of the extrusion roller 62, and the cross-section of the extrusion roller 62 is arranged in a trapezoidal shape. The outer wall of the lower end of the extrusion roller 62 is provided with a plurality of spiral grooves 622 distributed in a circular array, and a piston cavity 623 is provided inside the extrusion roller 62. The inner wall of the piston cavity 623 is slidably connected with the piston plate 613.

[0025] Welding treatment of the steel pipe blank 8 by the extrusion rollers 62: The two extrusion rollers 62 are symmetrically installed on the slide bars 67 of the fixed frame 61 through the moving blocks 68. The initial spacing is preset according to the pipe diameter of the steel pipe blank 8 and is kept stationary or rotated at a low speed by the driving motor 63. The external cooling water pipe sprays a coolant, such as emulsion, onto the surface of the extrusion rollers 62. The specific operation process is prior art and will not be described in detail here. The coolant is guided to flow along the roller surface through the chamfer 621 to pre-lower the temperature of the roller body and avoid high-temperature adhesion of molten metal. The formed steel pipe blank 8 is pushed into the protective frame 5 at a constant speed by the forming conveying mechanism 2. After the welding torch 4 (such as a high-frequency induction coil) heats the weld edge to the molten state, it enters between the two extrusion rollers 62. The driving motor 63 is started to drive the extrusion rollers 62 to rotate at a certain speed. The friction between the roller surface and the surface of the steel pipe blank 8 drives it forward. The trapezoidal cross-section of the extrusion rollers 62 fits the outer surface of the steel pipe blank 8. The grooves on the surface of the extrusion rollers 62 have a certain depth to ensure that the molten metal is evenly extruded. Under the rotational extrusion of the extrusion rollers 62, the weld is simultaneously subjected to the top pressure of the rolling roller 7 to roll the generated weld bead, forming a two-way extrusion, promoting the diffusion and combination of metal atoms, removing pores and impurities. The chamfer 621 provided at the upper end of the extrusion rollers 62 can improve the discharge of the coolant and prevent it from accumulating on the upper surface of the extrusion rollers 62, affecting the heat dissipation effect. The spiral groove 622 provided below the extrusion rollers 62, on the one hand, is to guide the coolant to flow spirally along the roller surface, increasing the heat transfer area and taking away the heat transferred from the welding area to the roller body in time. On the other hand, it realizes the knocking vibration of the vibration assembly 10 on the steel pipe blank 8 through the sliding connection with the extrusion block 106, thereby improving the welding quality.

[0026] When the temperature of the welding place gradually rises and exceeds a certain range, as the temperature increases, the normal cooling rate is constant at this moment, so it is impossible to discharge heat in time. A certain amount of inert gas, such as argon, is stored inside the piston chamber 623. When the temperature rises to a certain level, the temperature inside the piston chamber 623 begins to rise through the heat conduction effect, and the gas gradually begins to expand and squeezes the extrusion piston plate 613, so that the piston rod 612 drives the collar 65 to move toward the fixed frame 61. The inner diameter of the collar 65 is larger than the outer diameter of the support plate 66, allowing the two to slide relative to each other. When the collar 65 squeezes the support plate 66, the ball 661 rolls on the end of the support plate 66, which will slide and It is converted into rolling friction to ensure smooth movement. This process will compress the reset spring 610, drive the support rod 611 to slide inside the fixed cylinder 69, and through the mutual sliding between the ring 65 and the ball 661, the normal operation of the extrusion roller 62 can be guaranteed, and finally the support rod 611 squeezes the pressure sensor 614. When the pressure of the end of the support rod 611 on the pressure sensor 614 exceeds the preset threshold, the sensor outputs an electrical signal to the air pump 92 controller to start working, thereby triggering the operation of the pressurizing component 9. The total delay time from temperature rise to sensor triggering is controlled within a reasonable time to meet the needs of real-time adjustment of high-frequency welding.

[0027] Furthermore, the extrusion welding assembly 6 also includes a collar 65, the inner diameter of the collar 65 is larger than the outer diameter of the support plate 66, the collar 65 is located above the support plate 66, and the upper side wall of the collar 65 is fixedly connected with a plurality of piston rods 612 distributed in a circumferential array, and the end of the piston rod 612 away from the collar 65 passes through the inner wall of the piston cavity 623 and is fixedly connected to the piston plate 613, and the outer wall of the piston rod 612 is sleeved with a telescopic spring 64, and the two ends of the telescopic spring 64 are respectively fixedly connected to the collar 65 and the side wall of the extrusion roller 62; the pressurizing assembly 9 includes an air storage cylinder 91 and an air pump 92, A connecting pipe 94 is fixedly connected to the side wall of the air cylinder 91, and the air pump 92 is fixedly connected to the side wall of the fixed frame 61. The end of the connecting pipe 94 away from the air cylinder 91 passes through the side wall of the fixed frame 61 and is fixedly connected to one end of the air pump 92. Adjusting rods 93 are slidably connected to both ends of the air cylinder 91; the adjusting rod 93 is arranged in an "I" shape, and the end of the adjusting rod 93 located on the outside of the air cylinder 91 is fixedly connected to the driving motor 63. A buffer spring 95 is sleeved on the outer wall of the adjusting rod 93, and the two ends of the buffer spring 95 are respectively fixedly connected to the inner wall of the air cylinder 91 and the side wall of one end of the adjusting rod 93.

[0028] Adaptation adjustment of the distance between the pressing assembly 9 and the extrusion roller 62 and the steel tube blank 8: The pressure sensor 614 is electrically connected to the air pump 92. When the pressure sensor 614 detects a certain pressure, it can trigger the air pump 92 to work. At this time, gas is filled into the interior of the air storage cylinder 91 through the air pump 92 and the connecting pipe 94, thereby increasing the air pressure inside the air storage cylinder 91. Further, it drives the two adjusting rods 93 to move synchronously in opposite directions, and in cooperation with the sliding connection between the moving block 68 and the sliding rod 67, the relative positions of the two driving motors 63 can be changed, so as to adjust the distance between the extrusion roller 62 and the steel tube blank 8, change the roll spacing, thereby reducing the extrusion force of the extrusion roller 62 on the steel tube blank 8, avoiding excessive extrusion of the molten metal from the weld seam, increasing the external convex bead, and further affecting the welding quality. When the temperature recovers, the gas shrinks, and through the elastic recovery of each spring, the support rod 611 and the pressure sensor 614 are separated to realize the reset of the roll spacing, without external power, adapting to the temperature fluctuation working conditions. The surface of the extrusion roller 62 in contact with the steel tube blank 8 can be sprayed with a ceramic coating, and the wear resistance of the roll body can be improved through the high-hardness coating, thereby increasing the service life.

[0029] Embodiment 2 Refer to Figures 5 - 10 , further; the vibration assembly 10 includes a fixing plate 104, the fixing plate 104 is fixedly connected to one end of the fixing frame 61, the lower side wall of the fixing plate 104 is fixedly connected to the air storage cylinder 91, the upper side wall of the fixing plate 104 is fixedly connected with a vertical cylinder 103, the vertical cylinder 103 is located between the two extrusion rollers 62, and an activity column 102 and a second telescopic spring 107 are arranged inside the vertical cylinder 103. The two ends of the second telescopic spring 107 are respectively fixedly connected to the side wall of one end of the activity column 102 and the side wall of the fixing plate 104; the activity column 102 is slidably connected to the inner wall of the vertical cylinder 103, one end of the activity column 102 located outside the vertical cylinder 103 is fixedly connected with a support plate 105, extrusion blocks 106 are fixedly connected to both sides of the support plate 105, a rolling ball 108 is rotatably connected to one end of the extrusion block 106, and a vibration block 101 is fixedly connected to the upper side wall of the support plate 105, and the vibration block 101 is located directly below the steel tube blank 8.

[0030] Treatment of gas during welding of the steel tube blank 8 by the vibration assembly 10: According to Figure 5As shown in the figure, the driving motor 63 synchronously drives the two extrusion rollers 62 to rotate in opposite directions, so that the extrusion roller 62 on the left side of the vibration assembly 10 rotates counterclockwise, while the extrusion roller 62 on the right side rotates clockwise, so as to cooperate with the conveying direction of the steel pipe blank 8 for work. While the extrusion roller 62 rotates, the inner wall of the spiral groove 622 at its lower end can extrude the inclined surface of the extrusion block 106. The shape of the extrusion block 106 is a right trapezoid. Through the sliding connection between the two, the support plate 105 can be driven to move downward, and then the movable column 102 is driven to compress the second telescopic spring 107, and the vibration block 101 is separated from the surface of the steel pipe blank 8. During the continuous rotation of the extrusion roller 62, the lower side wall of the extrusion roller 62 will slide with the rolling ball 108, so as to ensure the smooth operation of the extrusion roller 62 itself. In addition, the extrusion roller 62 has a certain rotational speed. After the rolling ball 108 is separated from the side wall of the extrusion roller 62, the rapid reset of the vibration block 101 can be realized through the elastic recovery of the second telescopic spring 107, so as to realize the knocking vibration of the steel pipe blank 8. The shape of the extrusion block 106 is not unique and can be changed according to the actual situation, as long as the rapid rebound of the vibration block 101 can be ensured to realize the knocking vibration of the steel pipe blank 8. By vibrating, the surface tension of the molten metal is destroyed, promoting its aggregation towards the center of the weld, reducing the overflow to form welding beads, and the vibration energy can assist in eliminating welding stress, preventing weld cracks caused by uneven temperature, discharging the air at the welding part, reducing the generation of pores, and improving the welding quality. The vibration block 101 can be made of cemented carbide. By generating vibrations at a certain frequency, the surface oxide film of the molten metal is destroyed, promoting the flow of the liquid metal to fill the micro-gaps and improving the weld density.

[0031] It should be noted that the specific model specifications of electrical components such as motors and air pumps need to be selected according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0032] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, 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 steel pipe welding and forming device, comprising a processing table (1), wherein a forming conveying mechanism (2) and a blowing mechanism (3) are arranged at the upper end of the processing table (1), a protective frame (5) and a steel pipe blank (8) are arranged on one side of the blowing mechanism (3), and the protective frame (5) is connected with a welding machine (4), characterized in that, It further includes: An extrusion welding assembly (6), which is located inside the protective frame (5), and the extrusion welding assembly (6) is used for welding the steel pipe blank (8); A pressurizing assembly (9), which is connected to the extrusion welding assembly (6), and the pressurizing assembly (9) is used for adjusting the extrusion welding assembly (6); A vibration assembly (10), which is located inside the protective frame (5), and the vibration assembly (10) is used for knocking the steel pipe blank (8).

2. The steel pipe welding and forming device according to claim 1, wherein, The blowing mechanism (3) is located between the forming and conveying mechanism (2) and the protective frame (5). The forming and conveying mechanism (2), the blowing mechanism (3) and the protective frame (5) are all fixedly connected to the upper end of the processing table (1). One side of the protective frame (5) is fixedly connected to the welding torch (4). The welding torch (4) is located between the protective frame (5) and the blowing mechanism (3). The welding torch (4) is sleeved outside the steel pipe blank (8). One end of the steel pipe blank (8) is respectively in transmission connection with the blowing mechanism (3) and the extrusion welding assembly (6). A rolling roller (7) is arranged inside the protective frame (5), and the rolling roller (7) is located directly above the steel pipe blank (8).

3. A steel pipe welding and forming device according to claim 1, characterized in that, The extrusion welding assembly (6) includes a fixed frame (61). A slide bar (67) is fixedly connected inside the fixed frame (61). Moving blocks (68) are slidably connected to both ends of the slide bar (67) symmetrically about the center line. One end of the moving block (68) is fixedly connected to a driving motor (63). The driving motor (63) is slidably connected to the inner wall of the fixed frame (61). One end of the driving motor (63) is fixedly connected to an extrusion roller (62).

4. A steel pipe welding and forming device according to claim 3, characterized in that, A fixed cylinder (69) is fixedly connected to the upper side wall of the driving motor (63). A support rod (611) and a pressure sensor (614) are respectively arranged inside the fixed cylinder (69). The support rod (611) is slidably limited to the inner wall of the fixed cylinder (69). The pressure sensor (614) is fixedly connected to the driving motor (63). One end of the support rod (611) located outside the fixed cylinder (69) is fixedly connected to a support plate (66). A return spring (610) is sleeved on the outer wall of the support rod (611). Both ends of the return spring (610) are respectively fixedly connected to the support plate (66) and the side wall of the fixed cylinder (69). A plurality of ball bearings (661) distributed in a circumferential array are rotatably connected to one end of the support plate (66) away from the support rod (611).

5. A steel pipe welding and forming device according to claim 4, characterized in that, A chamfer (621) is formed at the upper corner of the extrusion roller (62). The cross section of the extrusion roller (62) is trapezoidal. A plurality of spiral grooves (622) distributed in a circumferential array are formed on the outer wall of the lower end of the extrusion roller (62). A piston cavity (623) is formed inside the extrusion roller (62). A piston plate (613) is slidably connected to the inner wall of the piston cavity (623).

6. A steel pipe welding and forming device according to claim 5, characterized in that, The extrusion welding assembly (6) further includes a collar (65), the inner diameter of the collar (65) being larger than the outer diameter of the support plate (66). The collar (65) is located above the support plate (66). A plurality of piston rods (612) distributed in a circumferential array are fixedly connected to the upper side wall of the collar (65). One end of the piston rod (612) away from the collar (65) penetrates through the inner wall of the piston chamber (623) and is fixedly connected to the piston plate (613). A first telescopic spring (64) is sleeved on the outer wall of the piston rod (612). Two ends of the first telescopic spring (64) are respectively fixedly connected to the collar (65) and the side wall of the extrusion roller (62).

7. A steel pipe welding and forming device according to claim 1, characterized in that, The pressurizing assembly (9) includes an air storage cylinder (91) and an air pump (92). A connecting pipe (94) is fixedly connected to the side wall of the air storage cylinder (91). The air pump (92) is fixedly connected to the side wall of the fixed frame (61). One end of the connecting pipe (94) away from the air storage cylinder (91) penetrates through the side wall of the fixed frame (61) and is fixedly connected to one end of the air pump (92). Adjusting rods (93) are slidably connected to both ends of the air storage cylinder (91).

8. A steel pipe welding and forming device according to claim 7, characterized in that, The adjusting rod (93) is arranged in an "I" shape. One end of the adjusting rod (93) located outside the air storage cylinder (91) is fixedly connected to the driving motor (63). A buffer spring (95) is sleeved on the outer wall of the adjusting rod (93). Two ends of the buffer spring (95) are respectively fixedly connected to the inner wall of the air storage cylinder (91) and the side wall of one end of the adjusting rod (93).

9. A steel pipe welding and forming device according to claim 7, characterized in that, The vibration assembly (10) includes a fixing plate (104). The fixing plate (104) is fixedly connected to one end of the fixed frame (61). The lower side wall of the fixing plate (104) is fixedly connected to the air storage cylinder (91). A vertical cylinder (103) is fixedly connected to the upper side wall of the fixing plate (104). The vertical cylinder (103) is located between the two extrusion rollers (62). An active column (102) and a second telescopic spring (107) are arranged inside the vertical cylinder (103). Two ends of the second telescopic spring (107) are respectively fixedly connected to the side wall of one end of the active column (102) and the side wall of the fixing plate (104).

10. A steel pipe welding and forming device according to claim 9, characterized in that, The active column (102) is slidably connected to the inner wall of the vertical cylinder (103). One end of the active column (102) located outside the vertical cylinder (103) is fixedly connected to a support plate (105). Pressing blocks (106) are fixedly connected to both sides of the support plate (105). A rolling ball (108) is rotatably connected to one end of the pressing block (106). A vibration block (101) is fixedly connected to the upper side wall of the support plate (105). The vibration block (101) is located directly below the steel pipe blank (8).

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