A high-pressure oil pipe TIG welding equipment and its application method
By coordinating the rotation of the rotating components and the drive assembly, the TIG welding equipment for high-pressure oil pipes achieves all-round and uniform welding, solving the welding quality problem caused by mechanical interference and improving welding stability and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGYIN HYDRAULIC OIL TUBE CO LTD
- Filing Date
- 2026-04-20
- Publication Date
- 2026-06-30
AI Technical Summary
When welding high-pressure oil pipes, existing TIG welding equipment is prone to mechanical interference at bends, which can prevent the welding torch from completing all-round and uniform welding, affecting welding quality and stability.
A high-pressure oil pipe TIG welding device was designed. Through the segmented cooperation of the rotating component and the drive assembly, the rotating component drives the workpiece and the welding torch to form a local relative circular motion. In the interference area, the drive assembly independently drives the welding torch to make arc motion, so as to realize continuous, all-round and uniform welding of the flange and the high-pressure oil pipe butt weld.
It effectively avoids problems such as incomplete welding or uneven welding caused by interference, improves welding quality and stability, and ensures the continuity and uniformity of welding.
Smart Images
Figure CN122299102A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of welding equipment technology, and more specifically, to a high-pressure oil pipe TIG welding device and its method of use. Background Technology
[0002] In large high-pressure hydraulic systems such as heavy engineering machinery, tunnel boring machines, ship deck machinery, and metallurgical rolling mill equipment, rigid high-pressure oil pipes are core conveying components. They are mainly used to connect key components such as main valves, oil tanks, and cylinders in the hydraulic system, and undertake the task of conveying high-pressure hydraulic oil. Due to the compact internal layout of the equipment and the need to bypass various structural components (such as chassis beams, equipment arches, engine room beams, etc.), the structure of these rigid high-pressure oil pipes has significant characteristics: the main body of the pipeline is a rigid seamless steel pipe, and the ends need to be butt-welded to flanges to meet the requirements of high-pressure sealing and strength. Moreover, most of the pipelines are obtuse angle bends (such as U-bends, C-bends, etc.) with an angle greater than 90° and less than or equal to 180°, in order to adapt to the complex internal spatial layout of the equipment and realize the reversal and detour of the pipeline.
[0003] Because high-pressure oil pipes have large-angle bends greater than 90° and less than or equal to 180°, the bends extend towards the welding end. When existing TIG welding equipment fixes the high-pressure oil pipe at the welding station and performs butt welding operations on its end and flange, the adjustment component used to adjust the position of the welding torch in the welding equipment is prone to mechanical interference with the bends of the high-pressure oil pipe. This is especially true when there is more than one bend, which can prevent the welding torch from completing a full-range and uniform weld. Summary of the Invention
[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a high-pressure oil pipe TIG welding equipment and its usage method that can effectively avoid mechanical interference and ensure welding quality.
[0005] To achieve the above objectives, the technical solution of the present invention is to provide a high-pressure oil pipe TIG welding device, comprising: Positioning mechanism, used to position flanges and oil pipes; The welding mechanism includes an adjustment component, a drive component, and a welding torch. The drive component is connected to the output end of the adjustment component, and the welding torch is connected to the output end of the drive component. The drive component is used to drive the welding torch to perform an arc motion, and the center of the arc motion is located on the center line of the flange. A workbench is rotatably provided with a rotating component. One of the positioning mechanism and the welding mechanism is mounted on the rotating component, and the other is mounted on the workbench. The rotating component is used to drive the flange and the welding torch to form a local relative circular motion.
[0006] Preferably, the positioning mechanism is fixedly mounted on the rotating component, an electric slide is fixedly mounted on the worktable, the adjusting component is fixedly mounted on the output end of the electric slide, the fixed end of the drive component is detachably connected to the output end of the adjusting component, and the welding torch is detachably connected to the output end of the drive component. This design facilitates adjustment of the welding torch position and allows for easy replacement of the drive component to accommodate welding of oil pipes and flanges of different sizes.
[0007] Preferably, the drive assembly includes a mounting plate, an arc rack, a gear, and a first servo geared motor. The mounting plate is mounted to the output end of the adjustment assembly by bolts and nuts. The mounting plate has a mounting groove, and the arc rack and the gear are both mounted in the mounting groove. The gear shaft is rotatably connected to the mounting plate, the first servo reduction motor is fixedly mounted on the mounting plate, and the first servo reduction motor is drivenly connected to the shaft. The arc-shaped rack meshes with the gear and is slidably connected to the mounting groove. The mounting groove has a guide arc surface, which slidably fits against the arc-shaped back of the arc-shaped rack away from the gear. With this design, the first servo geared motor can drive the welding torch to perform arc-shaped motion via gear and rack transmission.
[0008] Preferably, the rotating component includes a rotary table, a guide sleeve, a hydraulic cylinder, and a support platform. A second servo geared motor is fixedly installed inside the worktable, and the rotary table is driven by the second servo geared motor. The guide sleeve is fixedly connected to the rotary table, the hydraulic cylinder is fixedly installed inside the guide sleeve, the support platform is fixedly connected to the output end of the hydraulic cylinder, and the support platform is slidably connected to the guide sleeve. The positioning mechanism includes a positioning head, and a threaded groove is formed on the top of the support platform. The screw section of the positioning head is threaded into the threaded groove. This design allows for adjustment of the flange's positioning height by adjusting the height of the support platform and the positioning head, thus preventing interference between the oil pipe and the worktable.
[0009] Preferably, the positioning mechanism further includes a connector, a connecting plate, a bidirectional screw with positive and negative threads, a chuck, and a servo motor. The connector is connected to the rotary table, the connecting plate is connected to the connector, the connecting plate has a sliding groove, and the bidirectional screw with positive and negative threads is rotatably connected to the connecting plate. The system includes two chucks, each threadedly connected to the positive and negative thread sections of the bidirectional screw, respectively. Both chucks are slidably connected to the sliding groove. Clamping slots are provided on the sides of the two chucks that are close to each other. The servo motor is fixedly mounted on the connecting plate, and the bidirectional screw is driven by the servo motor. This design allows the oil pipe to be clamped and fixed using the chucks, while ensuring that the oil pipe is coaxial with the flange.
[0010] Preferably, the connector is configured as a linear module, which is vertically positioned and fixedly mounted on the rotary table. The connecting plate is fixedly mounted on the output end of the linear module. This design allows the linear module to adjust the gap between the welded ends of the flange and the oil pipe, ensuring weld quality.
[0011] Preferably, the adjustment assembly includes a bracket, a guide column, a drive plate, a servo cylinder, and a vibration unit. The bracket is fixedly installed at the output end of the electric slide table. The guide column and the servo cylinder are both fixedly installed on the bracket. The drive plate is slidably connected to the guide column, and the drive plate is vertically driven connected to the servo cylinder. The fixed end of the vibration unit is connected to the drive plate, and the mounting plate is connected to the output end of the vibration unit. The vibration unit drives the mounting plate to move up and down reciprocally. This design ensures that the welding torch is aligned with the circumferential seam between the flange and the oil pipe by adjusting the height of the drive plate, thus guaranteeing welding accuracy.
[0012] Preferably, the vibration unit includes a sliding sleeve, a vibrating plate, a turntable, a drive rod, and a third servo geared motor. The sliding sleeve and the third servo geared motor are both fixedly connected to the drive plate. The vibrating plate is slidably connected to the sliding sleeve. The mounting plate is mounted on the vibrating plate by bolts and nuts. The vibrating plate has a horizontal strip groove, the sliding sleeve has a through groove communicating with the strip groove, the turntable is driven and connected to the third servo reduction motor, the drive rod is eccentrically mounted on the turntable and passes through the strip groove; The turntable has a guide groove on the side near the vibrating plate, a slider is slidably installed in the guide groove, and the drive rod is fixedly installed on the slider; The outer ring of the turntable has a threaded groove communicating with the guide groove. An adjusting screw is threaded into the threaded groove. One end of the adjusting screw is rotatably connected to the slider, and a handle is fixedly connected to the end of the adjusting screw extending out of the turntable. This design allows the amplitude of the reciprocating motion of the vibrating plate to be adjusted, thus adapting to the welding of oil pipes and flanges with different gears.
[0013] Preferably, the adjustment assembly is equipped with several distance sensors. This design helps to determine the safe rotation range of the positioning mechanism.
[0014] A method for using a high-pressure oil pipe TIG welding device includes the following steps: S1. Determine the safe rotation range of the rotating component; S2. The welding mechanism performs welding automatically.
[0015] The beneficial effects of this invention are as follows: By using the high-pressure oil pipe TIG welding equipment and its method described in this invention, the rotating component and the drive assembly work together in a segmented manner. In the non-interference area, the rotating component drives the workpiece and the welding torch to form a local relative circular motion to complete the welding. In the interference area, the drive assembly independently drives the welding torch to perform arc motion for welding. This achieves continuous, all-round and uniform welding of the flange and high-pressure oil pipe butt weld, effectively avoiding the problem of weld leakage or uneven welding caused by interference, and improving the welding quality and welding stability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the high-pressure oil pipe TIG welding equipment; Figure 2 This is the first three-dimensional structural diagram of a welding mechanism; Figure 3 This is a schematic diagram of the second three-dimensional structure of the welding mechanism; Figure 4 This is a schematic diagram of the first three-dimensional structure of the driving component; Figure 5 This is a top-view sectional diagram of the drive component; Figure 6 It is a side sectional view of the worktable and rotating components (including the positioning head); Figure 7 yes Figure 6 Enlarged view of the structure at point A in the middle; Figure 8 This is a three-dimensional structural diagram of the rotating component; Figure 9 This is a three-dimensional structural diagram of the positioning mechanism and rotating components; Figure 10 This is a top sectional view of the positioning mechanism and rotating components; Figure 11 It is a three-dimensional structural diagram of the vibration unit, drive plate and mounting plate; Figure 12 yes Figure 11 A partial side sectional view; Figure 13 yes Figure 11 A partial top-view sectional diagram; Figure 14 This is a partial three-dimensional structural diagram of the vibration unit (excluding the sliding sleeve and the vibration plate). Figure 15 This is a three-dimensional structural diagram of the sliding sleeve and the vibrating plate; Figure 16 This is a schematic diagram of the three-dimensional structure of the turntable.
[0017] In the diagram: 1. Positioning mechanism; 11. Positioning head; 111. Screw section; 112. Positioning pin; 12. Connecting plate; 121. Slide groove; 13. Bidirectional screw with positive and negative threads; 14. Chuck; 141. Clamping groove; 15. Servo motor; 16. Linear module; 2. Welding mechanism; 21. Adjustment assembly; 211. Bracket; 212. Guide post; 213. Drive plate; 214. Servo electric cylinder; 215. Sliding sleeve; 2151. Through slot; 216. Vibrating plate; 2161. Strip groove; 217. Turntable; 2171. Guide groove; 2172. Slider; 2173. Screw groove; 2174. Adjusting screw; 2175. Handle; 2176. Locking screw sleeve; 218. Drive rod; 219. Third servo reducer 22. Speed motor; 221. Drive assembly; 221. Mounting plate; 2211. Mounting slot; 2212. Guide arc surface; 222. Circular arc rack; 2221. Arc-shaped back surface; 223. Gear; 2231. Rotating shaft; 224. First servo geared motor; 23. Welding torch; 241. First distance sensor; 242. Second distance sensor; 243. Third distance sensor; 244. Fourth distance sensor; 251. Guide bar; 252. Adjusting block; 3. Worktable; 31. Second servo geared motor; 4. Rotating components; 41. Rotary table; 42. Guide sleeve; 43. Hydraulic cylinder; 44. Support platform; 441. Threaded groove; 5. Electric slide table; 6. Flange; 7. Oil pipes. Detailed Implementation
[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed to enable those skilled in the art to better understand and implement the subject matter described herein. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.
[0019] To better understand this invention, the following is combined with... Figures 1-16This invention provides a detailed description of a high-pressure oil pipe TIG welding device and its usage method.
[0020] Example 1: like Figure 1 As shown, a high-pressure oil pipe TIG welding device includes: Positioning mechanism 1 is used to position flange 6 and oil pipe 7; The welding mechanism 2 includes an adjustment component 21, a drive component 22, and a welding torch 23. The drive component 22 is connected to the output end of the adjustment component 21, and the welding torch 23 is connected to the output end of the drive component 22. The drive component 22 is used to drive the welding torch 23 to perform an arc motion, and the center of the arc motion is located on the center line of the flange 6. The workbench 3 has a rotating component 4 rotatably mounted on it. One of the positioning mechanism 1 and the welding mechanism 2 is mounted on the rotating component 4, and the other is mounted on the workbench 3. The rotating component 4 is used to drive the flange 6 and the welding torch 23 to form a local relative circular motion.
[0021] It should be noted that flange 6 is a neck flange 6, and both flange 6 and oil pipe 7 have beveled ends. Positioning mechanism 1 is used to position flange 6 and oil pipe 7 coaxially. Specifically, after positioning mechanism 1 positions flange 6 and oil pipe 7, the welding end of flange 6 and the welding end of oil pipe 7 are coaxial and welded using TIG welding to ensure the quality of welding. The drive assembly 22 is used to drive the welding torch 23 to make arc motion in the interference area, and the rotating component 4 is used to drive the flange 6 and the welding torch 23 to form a local relative circular motion in the non-interference area. In coordination with the drive action of the drive assembly 22 in the interference area, the overall welding of the flange 6 and the oil pipe 7 is completed.
[0022] There are two ways to install the positioning mechanism 1 and the welding mechanism 2: The first installation method: the positioning mechanism 1 is installed on the rotating component 4, and the welding mechanism 2 is installed on the worktable 3; in the non-interference area, the rotating component 4 rotates, driving the positioning mechanism 1 and the positioned flange 6 and oil pipe 7 to rotate synchronously, and the welding torch 23 remains in the same position on the horizontal plane for welding; in the interference area, the rotating component 4 stops rotating, and the positioning mechanism 1, flange 6 and oil pipe 7 stop moving to avoid interference with the adjustment component 21. The welding torch 23 is driven by the drive component 22, thereby making arc motion in the horizontal plane for welding, and thus completing the welding between the flange 6 and the oil pipe 7; The second installation method: The welding mechanism 2 is installed on the rotating component 4, and the positioning mechanism 1 is installed on the worktable 3. The positioning mechanism 1 and the positioned flange 6 and oil pipe 7 are kept fixed. In the non-interference area, the welding torch 23 is driven by the rotating component 4, so as to perform local relative circular motion in the horizontal plane for welding. In the interference area, the rotating component 4 stops rotating, and the adjusting component 21 stops moving to avoid interference with the oil pipe 7 or the positioning mechanism 1. The welding torch 23 is driven by the driving component 22, so as to perform arc motion in the horizontal plane for welding, thereby completing the welding between the flange 6 and the oil pipe 7.
[0023] It should be emphasized that, regardless of the installation method, after the flange 6 and oil pipe 7 are positioned on the positioning mechanism 1, the center line of the flange 6 coincides with the rotation axis 2231 of the rotating component 4; the local relative circular motion between the flange 6 and the welding torch 23, that is, with the flange 6 as a reference, the welding torch 23 makes a local circular motion around the center line of the flange 6; the radius of the circular motion is the same as the radius of the local circular motion, which is the distance from the welding torch 23 to the center line of the flange 6; the welding torch 23 is fixed with a welding wire guiding and conveying structure for guiding and conveying the welding wire. During the welding process, the welding wire guiding and conveying structure and the welding torch 23 maintain synchronous displacement movement. The welding wire guiding and conveying structure is a mature technology in the field, and its specific structure will not be described in detail here.
[0024] By using the high-pressure oil pipe TIG welding equipment of the present invention, through the segmented cooperation of the rotating component 4 and the drive assembly 22, in the non-interference area, the rotating component 4 drives the workpiece and the welding torch 23 to form a local relative circular motion to complete the welding. In the interference area, the drive assembly 22 independently drives the welding torch 23 to perform arc motion for welding, thereby realizing continuous, all-round and uniform welding of the butt weld between the flange 6 and the high-pressure oil pipe 7, effectively avoiding the problem of weld leakage or uneven welding caused by interference, and improving the welding quality and welding stability.
[0025] Example 2: As an optimization of Example 1, such as Figure 1 As shown, the positioning mechanism 1 is fixedly installed on the rotating component 4, the electric slide 5 is fixedly installed on the worktable 3, the adjustment component 21 is fixedly installed on the output end of the electric slide 5, the fixed end of the drive component 22 is detachably connected to the output end of the adjustment component 21, and the welding torch 23 is detachably connected to the output end of the drive component 22.
[0026] It should be noted that the detachable connection between the drive assembly 22 and the adjustment assembly 21, and between the welding torch 23 and the drive assembly 22, can be any one of bolt connection, snap-fit connection or pin connection. Bolt fastening connection is preferred, which is convenient for disassembly and assembly, reliable connection, and facilitates the replacement of different specifications of drive assembly 22 according to welding conditions. The driving direction of the electric slide table 5 is perpendicular to the rotation axis 2231 of the rotating component 4. Specifically, for welding oil pipes 7 with different outer diameters to corresponding flanges 6, the circumference of the welding trajectory of the welding torch 23 is also different. Therefore, it is necessary to adjust the position of the welding mechanism 2 by using the electric slide table 5, thereby adjusting the position of the welding torch 23, so that the rotating part 4 rotates by driving the positioning mechanism 1, and the flange 6 and the welding torch 23 form a local circumferential motion with a corresponding radius. At the same time, it is necessary to disassemble and replace the corresponding drive assembly 22 so that the drive assembly 22 can drive the welding torch 23 to perform an arc motion with a corresponding radius, thereby improving the applicability of the high-pressure oil pipe TIG welding equipment.
[0027] Example 3: As an optimization of Example 2, such as Figures 2-5 As shown, the drive assembly 22 includes a mounting plate 221, an arc rack 222, a gear 223 and a first servo geared motor 224. The mounting plate 221 is mounted on the output end of the adjustment assembly 21 by bolts and nuts. The mounting plate 221 has a mounting groove 2211, and the arc rack 222 and the gear 223 are both mounted in the mounting groove 2211. The shaft 2231 of gear 223 is rotatably connected to the mounting plate 221, the first servo reduction motor 224 is fixedly mounted on the mounting plate 221, and the first servo reduction motor 224 is drivenly connected to the shaft 2231. The arc rack 222 meshes with the gear 223, and the arc rack 222 is slidably connected to the mounting groove 2211. The mounting groove 2211 is provided with a guide arc surface 2212, and the guide arc surface 2212 is slidably attached to the arc-shaped back surface 2221 of the arc rack 222 away from the gear 223.
[0028] It should be noted that the rotating shaft 2231 is fixedly connected to the gear 223. The first servo reduction motor 224 drives the rotating shaft 2231 and the gear 223 to rotate, thereby driving the arc rack 222 to make arc motion, and then driving the welding torch 23 to make arc motion. By setting the guide arc surface 2212, the accuracy of the arc motion of the arc rack 222 and the welding torch 23 can be guaranteed. The curved back surface 2221 is the surface opposite to the tooth groove of the curved rack. That is, when the tooth groove of the curved rack is located in the inner ring of the curved rack, the curved back surface 2221 is located in the outer ring of the curved rack. At this time, the guide arc surface 2212 is a concave arc surface; when the tooth groove of the curved rack is located in the outer ring, the curved back surface 2221 is located in the inner ring of the curved rack. At this time, the guide arc surface 2212 is a convex arc surface.
[0029] In this embodiment, the tooth groove of the arc-shaped rack is located on the inner ring, and the arc-shaped back surface 2221 is located on the outer ring.
[0030] Example 4: As an optimization of Example 3, such as Figures 6-8 As shown, the rotating component 4 includes a rotating table 41, a guide sleeve 42, a hydraulic cylinder 43, and a support platform 44. A second servo reduction motor 31 is fixedly installed inside the worktable 3, and the rotating table 41 is driven by the second servo reduction motor 31. The guide sleeve 42 is fixedly connected to the rotary table 41, the hydraulic cylinder 43 is fixedly installed inside the guide sleeve 42, and the support platform 44 is fixedly connected to the output end of the hydraulic cylinder 43, and the support platform 44 is slidably connected to the guide sleeve 42. The positioning mechanism 1 includes a positioning head 11, and a threaded groove 441 is provided on the top of the support platform 44. The screw section 111 of the positioning head 11 is threaded into the threaded groove 441.
[0031] It should be noted that the driving direction of the electric slide table 5 is along the radial direction of the rotary table 41, the guide sleeve 42 is fixedly installed at the top center of the rotary table 41, the positioning head 11 positions the flange 6 through the positioning pin 112 adapted to the center hole of the flange 6, the screw section 111 is fixedly connected to the bottom of the positioning pin 112, and the top of the positioning pin 112 is chamfered. When positioning flange 6, place flange 6 on support platform 44 so that the end face of flange 6 away from the welding end is in contact with the top surface of support platform 44, and positioning pin 112 is inserted into the center hole of flange 6. By setting chamfer, it is easy to position flange 6. Positioning head 11 is detachable and replaceable to adapt to the positioning of flange 6 with different inner diameters. The hydraulic cylinder 43 can drive the support platform 44 and the positioning head 11 to rise and fall, thereby adjusting the positioning height of the flange 6. When the bend of the oil pipe 7 is too long, it can effectively prevent the bend of the oil pipe 7 from interfering with the workbench 3, which is beneficial to improving the applicability of the high-pressure oil pipe TIG welding equipment.
[0032] In this embodiment, the rotary table 41 is rotatably connected to the worktable 3 to improve the stability of the rotation of the rotary table 41.
[0033] Example 5: As an optimization of Example 4, such as Figure 9 and Figure 10As shown, the positioning mechanism 1 also includes a connector, a connecting plate 12, a bidirectional screw 13 with positive and negative threads, a chuck 14, and a servo motor 15. The connector is connected to the rotary table 41, the connecting plate 12 is connected to the connector, the connecting plate 12 has a sliding groove 121, and the bidirectional screw 13 with positive and negative threads is rotatably connected to the connecting plate 12. Two chucks 14 are provided. The two chucks 14 are respectively threaded to the positive and negative sections of the bidirectional screw 13. Both chucks 14 are slidably connected to the slide groove 121. The two chucks 14 are provided with clamping grooves 141 on the side of each other. The servo motor 15 is fixedly installed on the connecting plate 12. The bidirectional screw 13 is driven by the servo motor 15. The connector is set as a linear module 16, which is set vertically and fixedly installed on the rotary table 41. The connecting plate 12 is fixedly installed at the output end of the linear module 16.
[0034] It should be noted that the forward and reverse sections of the bidirectional screw 13 are both located in the slide groove 121, and the clamping groove 141 has a V-shaped structure, so that oil pipes 7 of different diameters can be clamped and fixed. The servo motor 15 drives the bidirectional screw 13 to rotate forward or reverse, thereby driving the two chucks 14 to move closer or further away from each other, thereby clamping or releasing the oil pipe 7. The center line of the positioning head 11 is located on the symmetrical plane of the two clamps 14, thereby ensuring that the welded ends of the flange 6 and the oil pipe 7 are coaxial after the flange 6 and the oil pipe 7 are positioned. Since flange 6 and oil pipe 7 are butt welded, during the welding process, a gap must be left between the end faces of the two welding ends of flange 6 and oil pipe 7 that are close to each other to ensure that the welding rod / wire can melt to the root of the weld and to ensure that a through butt weld can be formed, thereby ensuring the strength of the weld. The linear module 16 can drive the connecting plate 12, the clamp 14 and the clamped oil pipe 7 to move up and down, thereby adjusting the gap between the welding ends of the flange 6 and the oil pipe 7 to meet the welding gap requirements and ensure the quality of the welding.
[0035] Example 6: As an optimization of Example 5, such as Figure 2 and Figure 3 As shown, the adjustment assembly 21 includes a bracket 211, a guide column 212, a drive plate 213, a servo cylinder 214, and a vibration unit. The bracket 211 is fixedly installed on the output end of the electric slide table 5. The guide column 212 and the servo cylinder 214 are both fixedly installed on the bracket 211. The drive plate 213 is slidably connected to the guide column 212, and the drive plate 213 is connected to the servo cylinder 214 for up-down driving. The fixed end of the vibration unit is connected to the drive plate 213, and the mounting plate 221 is connected to the output end of the vibration unit. The vibration unit is used to drive the mounting plate 221 to move up and down reciprocally.
[0036] It should be noted that the length of the guide post 212 is along the vertical direction. The servo electric cylinder 214 adjusts the height of the drive assembly 22 and the welding torch 23 by adjusting the height of the drive plate 213, thereby ensuring that the welding torch 23 is aligned with the circumferential seam between the flange 6 and the oil pipe 7. The vibration unit drives the mounting plate 221 to move up and down reciprocally, which in turn causes the drive unit and the welding torch 23 to move reciprocally. That is, during the welding process, on the one hand, the welding torch 23 makes a circular motion around the butt joint of the oil pipe 7 and the flange 6, and on the other hand, the welding torch 23 vibrates up and down along the weld thickness direction to achieve a composite welding trajectory. This welding method can make the two sides of the bevel better fused and the molten pool more evenly filled, effectively avoiding incomplete penetration and poor sidewall fusion, improving the weld density and structural strength, while reducing welding deformation and meeting the high-quality requirements of butt welding of the high-pressure oil pipe 7.
[0037] Example 7: As an optimization of Example 6, such as Figures 11-16 As shown, the vibration unit includes a sliding sleeve 215, a vibrating plate 216, a turntable 217, a drive rod 218, and a third servo geared motor 219. The sliding sleeve 215 and the third servo geared motor 219 are both fixedly connected to the drive plate 213. The vibrating plate 216 is slidably connected to the sliding sleeve 215. The mounting plate 221 is mounted on the vibrating plate 216 by bolts and nuts. The vibrating plate 216 has a horizontal strip groove 2161, the sliding sleeve 215 has a through groove 2151 that communicates with the strip groove 2161, the turntable 217 is driven and connected to the third servo reduction motor 219, the drive rod 218 is eccentrically mounted on the turntable 217, and the drive rod 218 passes through the strip groove 2161. A guide groove 2171 is provided on the side of the turntable 217 near the vibrating plate 216. A slider 2172 is slidably installed in the guide groove 2171, and a drive rod 218 is fixedly installed on the slider 2172. The outer ring of the turntable 217 has a threaded groove 2173 that communicates with the guide groove 2171. An adjusting screw 2174 is threadedly connected to the threaded groove 2173. One end of the adjusting screw 2174 is rotatably connected to the slider 2172. A handle 2175 is fixedly connected to one end of the adjusting screw 2174 that extends out of the turntable 217.
[0038] It should be noted that the inner cavity of the through groove 2151 is connected to the inner cavity of the sliding sleeve 215, the vibrating plate 216 slides against the inner wall of the inner cavity, the outer diameter of the drive rod 218 is adapted to the width of the strip groove 2161, and the drive rod 218 can slide and rotate relative to the strip groove 2161. The third servo geared motor 219 drives the turntable 217 and the drive rod 218 to rotate. Due to the eccentric setting of the drive rod 218, during the rotation of the drive rod 218, the vibration plate 216 is driven to slide up and down in the sliding sleeve 215 by squeezing the inner wall of the strip groove 2161, thereby driving the drive assembly 22 and the welding torch 23 to move up and down. The middle section of the adjusting screw 2174 is threaded, while the two ends are not threaded. The length direction of the adjusting screw 2174 is the same as the length direction of the guide groove 2171. By rotating the handle 2175, the adjusting screw 2174 is driven to rotate, which can drive the adjusting screw 2174, the slider 2172 and the drive rod 218 to move along the length direction of the guide groove 2171, thereby adjusting the eccentricity of the drive rod 218 (i.e., the distance between the axis of the drive rod 218 and the axis of the turntable 217), and thus adjusting the amplitude of the up-and-down reciprocating motion of the vibration plate 216 and the welding torch 23 to adapt to the welding of oil pipes 7 and flanges 6 with different gears 223.
[0039] In this embodiment, the slot 2151 is circular, and the turntable 217 is rotatably connected to the slot 2151 to improve the stability of the turntable 217 rotation. The adjusting screw 2174 is locked by the locking sleeve 2176, which is connected to the adjusting screw 2174 and abuts against the outer ring of the turntable 217.
[0040] Example 8: As an optimization of Example 7, such as Figure 2 and Figure 3 As shown, the adjustment component 21 is equipped with several distance sensors.
[0041] It should be noted that when the distance sensor detects that the distance between the oil pipe 7 or the linear module 16 and the distance sensor reaches the preset value, it means that the oil pipe 7 or the linear module 16 is about to interfere with the adjustment component 21 of the welding mechanism 2. By rotating the oil pipe 7 to rotate in both directions by the rotating component 4, the safe area (i.e., the non-interference area) of the rotating component 4 can be measured. During the welding process, firstly, the rotating component 4 drives the flange 6 and the oil pipe 7 to rotate from the beginning to the end of the safe area. During this process, the flange 6 and the welding torch 23 undergo local relative circular motion in the horizontal direction, and the vibration unit drives the welding torch 23 to move up and down reciprocally to perform welding. Subsequently, the drive component 22 drives the welding torch 23 to rotate along the extension direction of the welding trajectory. During this process, the welding torch 23 makes arc motion in the horizontal direction, and the vibration unit continues to drive the welding torch 23 to move up and down reciprocally to perform welding until the welding is completed.
[0042] It should be emphasized that the angular velocity of the rotating component 4 is the same as the angular velocity of the drive assembly 22 driving the welding torch 23 to rotate.
[0043] In this embodiment, four distance sensors are provided: a first distance sensor 241 and a second distance sensor 242 that are slidably mounted on both sides of the bracket 211, and a third distance sensor 243 and a fourth distance sensor 244 that are fixedly mounted on both sides of the drive plate 213. The first distance sensor 241 and the third distance sensor 243 are located on one side of the adjustment component 21, and the second distance sensor 242 and the fourth distance sensor 244 are located on the other side of the adjustment component 21. Guide bars 251 are fixedly connected to both sides of the bracket 211, and adjustment blocks 252 are slidably connected to the guide bars 251. The first distance sensor 241 and the second distance sensor 242 are respectively fixedly installed on the adjustment blocks 252 on both sides of the bracket 211. By adjusting the adjustment blocks 252 up and down, the vertical height of the corresponding first distance sensor 241 or second distance sensor 242 can be adjusted to adapt to oil pipes 7 with different bending shapes and ensure the reliability of safety area measurement. First, in front of the positioning flange 6 and the oil pipe 7, the rotary table 41 is adjusted so that the linear module 16 is located on the side of the guide sleeve 42 away from the welding mechanism 2. After the flange 6 and oil pipe 7 are positioned, the rotating component 4 first drives the flange 6 and oil pipe 7 to rotate forward. When the first distance sensor 241 detects that the distance between the oil pipe 7 and the first distance sensor 241 reaches the preset value, or the third distance sensor 243 detects that the distance between the linear module 16 and the third distance sensor 243 reaches the preset value, the corresponding distance sensor records the position of the rotating component 4 at this time as the first point, and the rotating component 4 stops rotating. Subsequently, the rotating component 4 drives the flange 6 and the oil pipe 7 to reverse. When the second distance sensor 242 detects that the distance between the oil pipe 7 and the second distance sensor 242 reaches the preset value, or the fourth distance sensor 244 detects that the distance between the linear module 16 and the fourth distance sensor 244 reaches the preset value, the corresponding distance sensor records the position of the rotating component 4 at this time as the second point, and the rotating component 4 stops rotating. The safe zone is the area from which the rotating part 4 rotates from the first point to the second point, or the safe zone is the area from which the rotating part 4 rotates from the second point to the first point. It is important to emphasize that clockwise and counterclockwise represent two opposite directions of rotation. If clockwise rotation is clockwise, then counterclockwise rotation is counterclockwise; if clockwise rotation is counterclockwise, then counterclockwise rotation is clockwise.
[0044] Example 9: A method for using a high-pressure oil pipe TIG welding device includes the following steps: S1. Determine the safe area for the rotation of rotating component 4; S2, Welding mechanism 2 automatically performs welding.
[0045] It should be noted that S1 includes the following steps: S11. Install a positioning head 11 adapted to flange 6 on support platform 44, and install a drive assembly 22 adapted to welding trajectory of oil pipe 7 on vibration plate 216. S12. Adjust the height of the support platform 44 by hydraulic cylinder 43, and adjust the height of the chuck 14 by linear module 16. S13. Position the flange 6 on the support platform 44, adjust the position of the welding torch 23 of the welding mechanism 2 in the horizontal direction through the electric slide table 5, and adjust the height of the welding torch 23 through the servo electric cylinder 214 so that the welding torch 23 is located on the welding trajectory. S14. Place the oil pipe 7 between the two clamps 14, and make the bent section of the oil pipe 7 fit with the straight module 16. Adjust the distance between the two clamps 14 so that the two clamps 14 clamp the oil pipe 7. S15. Adjust the distance between the welded end of the oil pipe 7 and the welded end of the flange 6 by using the linear module 16. S16, the rotating component 4 sequentially drives the flange 6 and oil pipe 7 to rotate forward and reverse, and the distance sensor measures the safe area of the rotating component 4.
[0046] S2 includes the following steps: S21, positioning flange 6 and oil pipe 7; S22, Welding mechanism 2 moves toward the guide sleeve 42 until welding torch 23 is on the welding trajectory; S23, Rotating component 4 drives flange 6 and oil pipe 7 to rotate clockwise to the first position; S24, the rotating component 4 drives the flange 6 and oil pipe 7 to reverse to the second position, and at the same time the welding gun 23 performs welding; S25, the drive assembly 22 drives the welding torch 23 to rotate along the extension direction of the welding trajectory, and the welding torch 23 completes the welding of the remaining parts; S26. Welding mechanism 2 is reset, the workpiece is removed, and chuck 14 is reset.
[0047] It should be emphasized that in S21, the positioning of the oil pipe 7 is basically the same as in S14. That is, in S21 and S14, the positional deviation of the oil pipe 7 being clamped is within the preset range, and the bent section of the oil pipe 7 is in contact with the straight module 16. For flange 6 and oil pipe 7 used to locate the safe area of rotation of rotating component 4, welding does not require S21, that is, it does not require repositioning. For subsequent welding of flange 6 and oil pipe 7 of the same type, the steps of S2 are repeated for assembly line welding.
[0048] The embodiments of the invention have been described above with reference to the accompanying drawings. However, the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments without departing from the spirit of the embodiments and the scope of protection of the claims, and all of these forms are within the protection scope of the embodiments.
Claims
1. A high pressure oil pipe TIG welding apparatus characterized by comprising: include: Positioning mechanism (1) for positioning flange (6) and oil pipe (7); The welding mechanism (2) includes an adjustment component (21), a drive component (22) and a welding torch (23). The drive component (22) is connected to the output end of the adjustment component (21), and the welding torch (23) is connected to the output end of the drive component (22). The drive component (22) is used to drive the welding torch (23) to make an arc motion, and the center of the arc motion is located on the center line of the flange (6). The workbench (3) is rotatably provided with a rotating component (4). One of the positioning mechanism (1) and the welding mechanism (2) is mounted on the rotating component (4), and the other is mounted on the workbench (3). The rotating component (4) is used to drive the flange (6) and the welding torch (23) to form a local relative circular motion.
2. The high-pressure oil pipe TIG welding equipment according to claim 1, characterized in that, The positioning mechanism (1) is fixedly installed on the rotating component (4), the electric slide (5) is fixedly installed on the worktable (3), the adjustment component (21) is fixedly installed on the output end of the electric slide (5), the fixed end of the drive component (22) is detachably connected to the output end of the adjustment component (21), and the welding torch (23) is detachably connected to the output end of the drive component (22).
3. The high-pressure oil pipe TIG welding equipment according to claim 2, characterized in that, The drive assembly (22) includes a mounting plate (221), an arc rack (222), a gear (223), and a first servo geared motor (224). The mounting plate (221) is mounted to the output end of the adjustment assembly (21) by bolts and nuts. The mounting plate (221) has a mounting groove (2211), and the arc rack (222) and the gear (223) are both mounted in the mounting groove (2211). The shaft (2231) of the gear (223) is rotatably connected to the mounting plate (221), the first servo geared motor (224) is fixedly mounted on the mounting plate (221), and the first servo geared motor (224) is drivenly connected to the shaft (2231); The arc rack (222) meshes with the gear (223) and is slidably connected to the mounting groove (2211). The mounting groove (2211) is provided with a guide arc surface (2212), and the guide arc surface (2212) is slidably attached to the arc-shaped back surface (2221) of the arc rack (222) away from the gear (223).
4. The high-pressure oil pipe TIG welding equipment according to claim 2, characterized in that, The rotating component (4) includes a rotating table (41), a guide sleeve (42), a hydraulic cylinder (43) and a support platform (44). A second servo reduction motor (31) is fixedly installed inside the worktable (3). The rotating table (41) is driven by the second servo reduction motor (31). The guide sleeve (42) is fixedly connected to the rotary table (41), the hydraulic cylinder (43) is fixedly installed inside the guide sleeve (42), the support platform (44) is fixedly connected to the output end of the hydraulic cylinder (43), and the support platform (44) is slidably connected to the guide sleeve (42). The positioning mechanism (1) includes a positioning head (11), and a threaded groove (441) is provided on the top of the support platform (44). The screw section (111) of the positioning head (11) is threaded into the threaded groove (441).
5. The high-pressure oil pipe TIG welding equipment according to claim 4, characterized in that, The positioning mechanism (1) further includes a connector, a connecting plate (12), a bidirectional screw (13) with positive and negative threads, a chuck (14) and a servo motor (15). The connector is connected to the rotary table (41), the connecting plate (12) is connected to the connector, the connecting plate (12) has a sliding groove (121), and the bidirectional screw (13) with positive and negative threads is rotatably connected to the connecting plate (12). Two chucks (14) are provided. The two chucks (14) are respectively threaded to the positive and negative sections of the bidirectional screw (13). Both chucks (14) are slidably connected to the slide groove (121). A clamping groove (141) is provided on the side of the two chucks (14) that are close to each other. The servo motor (15) is fixedly installed on the connecting plate (12). The bidirectional screw (13) is drivenly connected to the servo motor (15).
6. The high-pressure oil pipe TIG welding equipment according to claim 5, characterized in that, The connector is configured as a linear module (16), which is vertically arranged and fixedly installed on the rotary table (41). The connecting plate (12) is fixedly installed at the output end of the linear module (16).
7. The high-pressure oil pipe TIG welding equipment according to claim 3, characterized in that, The adjustment assembly (21) includes a bracket (211), a guide column (212), a drive plate (213), a servo electric cylinder (214), and a vibration unit. The bracket (211) is fixedly installed at the output end of the electric slide table (5). The guide column (212) and the servo electric cylinder (214) are both fixedly installed on the bracket (211). The drive plate (213) is slidably connected to the guide column (212), and the drive plate (213) is vertically driven connected to the servo electric cylinder (214). The fixed end of the vibration unit is connected to the drive plate (213), and the mounting plate (221) is connected to the output end of the vibration unit. The vibration unit is used to drive the mounting plate (221) to move up and down reciprocally.
8. The high-pressure oil pipe TIG welding equipment according to claim 7, characterized in that, The vibration unit includes a sliding sleeve (215), a vibration plate (216), a turntable (217), a drive rod (218), and a third servo geared motor (219). The sliding sleeve (215) and the third servo geared motor (219) are both fixedly connected to the drive plate (213). The vibration plate (216) is slidably connected to the sliding sleeve (215) up and down. The mounting plate (221) is installed on the vibration plate (216) by bolts and nuts. The vibrating plate (216) has a horizontal strip groove (2161), the sliding sleeve (215) has a through groove (2151) communicating with the strip groove (2161), the turntable (217) is driven and connected to the third servo reduction motor (219), the drive rod (218) is eccentrically mounted on the turntable (217), and the drive rod (218) passes through the strip groove (2161); The turntable (217) has a guide groove (2171) on the side near the vibrating plate (216), and a slider (2172) is slidably installed in the guide groove (2171). The drive rod (218) is fixedly installed on the slider (2172). The outer ring of the turntable (217) is provided with a threaded groove (2173) that communicates with the guide groove (2171). An adjusting screw (2174) is threadedly connected to the threaded groove (2173). One end of the adjusting screw (2174) is rotatably connected to the slider (2172). A handle (2175) is fixedly connected to one end of the adjusting screw (2174) that extends out of the turntable (217).
9. The high-pressure oil pipe TIG welding equipment according to claim 1, characterized in that, The adjustment component (21) is equipped with several distance sensors.
10. A method of using a high-pressure oil pipe TIG welding equipment, comprising using the high-pressure oil pipe TIG welding equipment according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Measure the safe area for the rotation of the rotating component (4); S2, The welding mechanism (2) performs welding automatically.