Welding positioning device and welding method for conical cover component

Abstract

The invention discloses a welding and positioning device and a welding method for a conical cover component, the welding and positioning device comprises a welding platform for bearing and placing a plurality of curled sector plates, and the welding platform is attached to the sector plates to jointly splice the integral conical cover component. And the welding platform can drive the current welding point of the adjacently spliced sector plates to keep a set welding distance from the welding gun in the movable state. According to the welding positioning device, a plurality of fan-shaped plates can be jointly spliced into a standard conical cover component in an unwelded state through the welding platform, that is, stable and standard splicing operation of the fan-shaped plates is achieved through the welding platform; the problem that a single fan-shaped plate or a plurality of fan-shaped plates are difficult to stabilize due to curled arc-shaped structural surfaces of the fan-shaped plates during manual welding at present is solved, so that the splicing efficiency and the splicing size precision can be greatly improved in the splicing operation, and the subsequent rapid welding operation is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of processing and production of conical cover components, and particularly relates to a welding positioning device and a welding method for conical cover components. Background Art

[0002] A conical cover component is a structural component with a conical top, and is widely used in fields such as industrial equipment, building structures, aerospace, and transportation. The top of the conical cover component is conical, and the bottom is usually circular (as shown in the attached drawings of the specification), and its shape is similar to an inverted cone. This design enables the conical cover to evenly distribute the force to the surrounding structure when bearing external pressure or load, reducing stress concentration. Figure 1 This design enables the conical cover to evenly distribute the force to the surrounding structure when bearing external pressure or load, reducing stress concentration.

[0003] Metal conical covers are commonly used in high-pressure vessels and the aerospace field; composite conical covers, due to their light weight and high strength characteristics, are widely used in transportation vehicles such as automobiles and ships. In a pressure vessel, it is used to close the top of the vessel (as shown in the attached drawings of the specification), bearing the internal pressure. Its conical design helps to reduce fluid resistance and improve the efficiency of fluid inlet and outlet; in aircraft such as rockets and missiles, the conical cover component is used in parts such as fairings and nose cones to reduce air resistance and improve flight performance; in transportation, it can be used in parts such as engine hoods and ship bows to optimize aerodynamic performance and improve fuel efficiency. Therefore, conical cover components have a wide range of applications in industries and other fields. Figure 1 This design enables the conical cover to evenly distribute the force to the surrounding structure when bearing external pressure or load, reducing stress concentration.

[0004] Currently, the manufacturing process of conical cover components is as Figure 2 shown. First, a plurality of sector plates are cut out on a flat plate, and then each sector plate is curled by a certain arc. Then, the curled sector plates are spliced, and welding is performed at the splicing joints of adjacent sector plates, and finally a conical cover component is formed. As Figure 3 shown is the welding machine currently used for flat plate welding. After the flat plates to be welded are butted, the welding gun moves along the length direction of the welding seam while welding, which can greatly improve the operation efficiency and quality assurance in the welding operation of flat plates. When applying this welding machine to the welding of conical cover components, since each welding seam is not a flat weld seam, and after the splicing of a plurality of sector plates of the conical cover component, the overall state is as Figure 5 shown, it is difficult to uniformly clamp and fix a plurality of sector plates, so high-efficiency welding cannot be achieved through this welding. Currently, manual splicing is still used followed by manual welding of each weld seam one by one. When welding manually, the operation efficiency cannot be improved, and at the same time, due to the influence of human factors, the welding quality cannot be guaranteed. As Figure 5As shown in the figure, when adjacent sector plates are spliced and welded, since the sector plates cannot be placed flat on the ground, there will be relative deflection of the sides of adjacent sector plates during splicing, which will affect the flatness of welding. In addition, when welding the next sector plate, it is necessary to splice it with the sector plate that has been welded in a suspended state. Therefore, there is a certain operation difficulty in the welding and forming of the conical cover component at present. Summary of the Invention

[0005] In view of the above problems, the present invention aims to provide a welding positioning device and a welding method for a conical cover component, which can accurately splice multiple sector plates into a formed conical cover component through a welding positioning platform, so as to facilitate subsequent welding operations, improve the welding operation efficiency and ensure the welding quality.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A welding positioning device for a conical cover component, the conical cover component is formed by splicing and welding multiple sector plates with arcs, the welding positioning device includes a welding platform for receiving and placing the multiple curled sector plates, the welding platform fits the multiple sector plates to jointly assemble into an integral conical cover component, and the welding platform can drive the current welding point of adjacent spliced sector plates to maintain a set welding distance from the welding torch in its movable state.

[0007] Preferably, the welding platform includes a conical cover plate that fits to form a standard conical cover component, at the bottom of the conical cover plate, support rods with their bottom ends connected are arranged at circumferential intervals, and a vertically liftable driving mechanism is hinged at the connection of the support rods.

[0008] Preferably, the rotation action at the hinge of the support rod and the lifting action of the driving mechanism are controlled by a control system.

[0009] Preferably, the driving mechanism is rotatably arranged on the ground.

[0010] Preferably, a leveling member for connecting the two sides of adjacent sector plates in the same plane along the weld seam is arranged on the conical cover plate.

[0011] Preferably, the leveling member is a U-shaped groove plate that commonly penetrates into the corners of the adjacent spliced sector plates, and suspension rods for suspending it on the surface of the conical cover plate are arranged at the bottom of the U-shaped groove plate.

[0012] A welding positioning device and a welding method for a conical cover component include the following steps: S1. Splice the curled sector plates along the circumference on the surface of the conical cover plate. During the splicing process, embed the two adjacent corners of the adjacent sector plates into the U-shaped groove plate to keep them flush, and complete the splicing of all sector plates; S2. Drive the conical cover plate to flip through the control system, so that one end of the weld seam of a single adjacent sector plate is vertically close to the welding torch correspondingly; S3. The welding torch moves horizontally along the length direction of the welding seam. Meanwhile, the control system controls the flipping of the conical cover plate and the lifting of the conical cover plate by the driving mechanism, so that the welding torch gradually moves forward along the welding seam and keeps the distance from the current welding point equal. S4. After completing the welding of a single welding seam, the horizontal rotation driving mechanism is rotated so that the next welding seam corresponds to the welding torch. Then the welding torch moves in the reverse direction. Meanwhile, the control system controls the flipping of the conical cover plate and the lifting of the conical cover plate by the driving mechanism again, so that the welding torch gradually moves forward along the welding seam and keeps the distance from the current welding point equal, and the welding operations of multiple welding seams are completed in sequence to form the conical cover member of the overall structure.

[0013] The beneficial effect of the present invention is that: the welding positioning device can assemble multiple sector plates into a standard conical cover member in an un-welded state through the welding platform, that is, the stable and standard splicing operation of the sector plates is realized by using the welding platform, and the problem that it is difficult to stably splice single and multiple sector plates due to the curved structure surface of the curled sector plates during manual welding at present is solved. Therefore, the splicing efficiency and the splicing dimensional accuracy can be greatly improved during the splicing operation, which is convenient for subsequent rapid welding operations.

[0014] The welding platform adjusts the position of the welding seam of the spliced sector plates according to the movement welding of the welding torch, so that the welding seam of the curved structure keeps the same distance from the current welding point (position) as the welding torch, thereby ensuring the welding quality of the welding seam of the curved structure and avoiding the problems of over-welding and under-welding at different positions of the welding seam caused by the inconsistent distance between the welding torch and the welding seam during the welding process. Description of the Drawings

[0015] Figure 1 It is a diagram of a pressure vessel with a conical cover member.

[0016] Figure 2 It is a diagram of the process of splicing and welding the curled sector plates into a conical cover member.

[0017] Figure 3 It is a diagram of the current welding process of a flat plate by welding.

[0018] Figure 4 It is a top view of the flat plate welding.

[0019] Figure 5 It is a diagram of the deflection and dislocation of adjacent sector plates during the current manual splicing of sector plates.

[0020] Figure 6 It is a diagram of the process of fitting and splicing the sector plates on the conical cover plate of the present invention.

[0021] Figure 7 It is a sectional view of the sector plate fitting on the surface of the conical cover plate of the present invention.

[0022] Figure 8 This is a diagram showing the height difference of the sector plate of the present invention in the horizontal plane.

[0023] Figure 9 This is a diagram showing the contact interference of the welding torch during the welding of the sector plate by the conical cover plate horizontally placed in the present invention.

[0024] Figure 10 This is a diagram showing the structure of the conical cover plate that can be flipped and lifted in the present invention.

[0025] Figure 11 This is a diagram showing the flipping operation of the sector plate during its welding in the present invention.

[0026] Figure 12 This is a diagram showing the flipping and lifting operations of the sector plate during continuous welding along the weld seam in the present invention.

[0027] Figure 13 This is a diagram showing the unstable swing at the upper and lower ends when the sector plates with different radian and the conical cover plate surfaces cannot be completely flat in the present invention.

[0028] Figure 14 This is a diagram showing the overall structure of the U-shaped groove plate in the present invention.

[0029] Figure 15 This is a top view structural diagram of the U-shaped groove plate in the present invention.

[0030] Figure 16 This is a diagram showing the connection effect between the U-shaped groove plate and the sector plate in the present invention.

[0031] Figure 17 For the present invention Figure 16 The enlarged diagram of the structure at position A.

[0032] Figure 18 For the present invention Figure 17 Top view structural diagram.

[0033] Figure 19 This is a diagram showing the change in the distance between the single sector plate and the sector plates on the left and right due to misalignment in the present invention.

[0034] Figure 20 This is a diagram showing the distance setting of adjacent sector plates by setting a weld distance plate in the present invention.

[0035] Figure 21 For the present invention Figure 20 The diagram showing the separation of the weld distance plate from the sector plate after distance setting.

[0036] Figure 22 This is a physical diagram of the welded conical cover component.

[0037] Figure 23 This is a physical diagram of the current welding of the flat plate.

[0038] In the figure: 1 - conical cover member; 11 - sector plate; 2 - welding torch; 3 - flat plate; 4 - conical cover plate; 5 - support rod; 6 - driving cylinder; 7 - U-shaped groove plate; 71 - suspension rod; 7a - welding groove; 72 - fastening bolt; 73 - articulated screw; 74 - locking nut; 8 - weld distance plate; a - gap. Specific embodiments

[0039] In order to enable ordinary technicians in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] Referring to Figures 6 - 21 A welding positioning device for a conical cover member as shown, the conical cover member 1 is formed by splicing and welding a plurality of sector plates 11 with curled arcs, as shown in the attached drawings of the specification. Figure 2 As shown. To solve the problems that the current conical cover member 1 is not convenient for flat welding application, which affects the operation efficiency and cannot guarantee the welding quality, the welding positioning device disclosed in this application includes a welding platform for receiving and placing a plurality of curled sector plates 11. This welding platform fits the conical cover member 1 formed by splicing a plurality of sector plates 11 together. That is, this welding platform is equivalent to the structure of a standard conical cover member 1, and a plurality of sector plates 11 can be flatly spliced on its surface. After splicing, a standard conical cover member 1 in an unwelded state can be formed. That is, by using this welding platform, a stable and standard splicing operation of the sector plates 11 can be realized, solving the problem that it is difficult to stabilize a single sector plate 11 and multiple sector plates 11 due to the curled arc-shaped surface of the sector plate 11 during manual welding. Thus, the splicing efficiency and the dimensional accuracy of splicing can be greatly improved during the splicing operation, facilitating subsequent rapid welding operations.

[0041] Since the multiple weld seams after splicing of the sector plates 11 are not straight weld seams, while the welding torch 2 moves linearly for welding, to solve this problem, this welding platform can move, and in its moving state, it drives the current welding point of adjacent spliced sector plates 11 to maintain a set welding distance from the welding torch 2. During the welding process, welding is carried out step by step along the length of the weld seam. Therefore, this welding platform adjusts the position of the weld seam of the spliced sector plates 11 according to the moving welding of the welding torch 2, so that the arc-shaped weld seam keeps the same distance from the current welding point (point) as the welding torch 2, thereby ensuring the welding quality of the arc-shaped weld seam and avoiding the problems of over-welding and under-welding at different positions of the weld seam caused by inconsistent distances between the welding torch 2 and the weld seam during the welding process.

[0042] Specifically, as Figure 6 、 10As shown in FIG. -12, the welding platform includes a conical cover plate 4 that fits to form a standard conical cover member 1. At the bottom of the conical cover plate 4, support rods 5 are circumferentially spaced and connected at their bottom ends, and a vertically liftable drive mechanism is hingedly provided at the connection of the support rods 5. Among them, the drive mechanism is preferably a drive cylinder 6. During welding, as Figure 6 shown, now a plurality of sector plates 11 are flatly attached and connected to the conical cover plate 4, and then as Figure 11 shown, the conical cover plate 4 is rotated so that one end of a single weld seam is vertically aligned with the welding torch 2. Then the welding torch 2 moves horizontally along the arrow in Figure 12 . As the welding progresses step by step, the conical cover plate 4 is reversely flipped in the direction of the arc arrow in Figure 12 , and at the same time, the drive cylinder 6 is lifted and lowered in a timely manner to ensure that the distance between the current welding point and the welding torch 2 remains the same, and in this way, the continuous welding operation of a single weld seam is completed.

[0043] To further ensure the welding quality, the rotation action at the hinge of the support rod 5 and the lifting action of the drive mechanism are controlled by a control system. Among them, a steering gear or (servo) motor is preferably provided at the hinge of the support rod 5, and the control system is preferably a PLC control system. The control program of the PLC control system is preset according to the specifications and curling arcs of the sector plates 11, so that during the above welding process, the rotation of the conical cover plate 4 and the lifting of the drive cylinder 6 are automatically controlled, and thus the welding quality and operation efficiency can be further ensured and improved through the PLC control system.

[0044] On the basis of completing a single weld seam, to facilitate the continuous and rapid welding of weld seams at other positions, the drive mechanism is rotatably arranged on the ground (it can be preferably driven by a motor and a drive gear to drive the horizontal rotation of the drive mechanism, and the specific structure is not shown in the figure). When a single weld seam is completed, through the rotation of the drive mechanism relative to the ground, the next weld seam is aligned with the welding torch 2, and the welding torch 2 is preferably not reset after a single weld seam is completed, and is welded in a reset manner during the welding of the next weld seam, avoiding the waiting time increased by the reset of the welding torch 2 after a single weld seam is completed, and further shortening the welding cycle. Similarly, the driving motor can be connected to the above PLC control system, and after a single weld seam is welded, the position adjustment of the weld seam after the self-rotation of the conical cover plate 4 is realized.

[0045] Since each sector plate 11 is formed by separate curling, there will inevitably be a deviation in the curling arc after curling, which in turn causes the situation that the adjacent sides of the adjacent sector plates 11 cannot be flush and corresponding after splicing, and together with the deformation influence of the welding heat during the welding process, it jointly affects the surface flatness after welding. Therefore, to solve this problem, as Figure 16As shown, a leveling member is provided on the conical cover plate 4 to connect the two sides of adjacent fan-shaped plates 11 in the same plane along the welding seam. This leveling member can connect the sides of adjacent spliced fan-shaped plates 11 and keep them in the same plane after connection, so as to ensure the surface flatness of the conical cover member 1 after welding and overcome the thermal deformation problem caused by welding heat during the welding process.

[0046] Specifically, as Figures 14 - 18 shown, the leveling member is a U-shaped groove plate 7 that commonly penetrates into the corners of the adjacent fan-shaped plates 11. Suspension rods 71 are provided at the bottom of the U-shaped groove plate 7 to suspend it on the surface of the conical cover plate 4. As Figure 18 shown, the adjacent similar corners of the fan-shaped plates 11 commonly penetrate into the U-shaped groove plate 7 for limitation, so that the sides of the adjacent fan-shaped plates 11 are at the same height after splicing, solving the curling error and overcoming the influence of welding heat deformation on the welding flatness. At the same time, the U-shaped groove plate 7 can be used to limit the un-welded fan-shaped plates 11 when the conical cover plate 4 is flipped, avoiding the problem that the fan-shaped plates 11 slide off the conical cover plate 4 due to gravity after the conical cover plate 4 is flipped and tilted.

[0047] And as Figure 16 shown, after the U-shaped groove plate 7 is suspended on the conical cover plate 4 through the suspension rods 71, the same fan-shaped plates 11 are also suspended on the conical cover plate 4 with a gap a reserved. During the welding process, it can avoid the problem that the solder is difficult to disassemble the conical cover member 1 after connecting the surface of the conical cover plate 4 and the fan-shaped plates 11 due to the fan-shaped plates 11 being in contact with the surface of the conical cover plate 4, and the problem of disassembly damage to the formed welding seam and the surface of the conical cover plate 4.

[0048] After the corners of the fan-shaped plates 11 are penetrated and limited by the U-shaped groove plate 7, when welding to the end of the fan-shaped plates 11, the complete welding cannot be achieved due to the blockage of the U-shaped groove plate 7 to the corners of the fan-shaped plates 11, and secondary repair welding is required after disassembly. Therefore, to solve this problem, as Figure 15 、 18 shown, a welding groove 7a is provided in the middle of the U-shaped groove plate 7 to expose the adjacent sides of the adjacent fan-shaped plates 11. This welding groove 7a enables the sides of the corners of the fan-shaped plates 11 to be exposed after the corners of the fan-shaped plates 11 are penetrated into the U-shaped groove plate 7 for limitation, and then the primary forming welding of the welding seam can be completed to solve the process of secondary repair welding. At the same time, the primary forming welding has better integral welding quality compared with secondary repair welding.

[0049] Since there is a gap when the corners of the fan-shaped plates 11 penetrate into the U-shaped groove plate 7, this gap will affect the planarity after welding. Therefore, to solve this problem, as Figure 14 、 17As shown, the U-shaped groove plate 7 located on both sides of the welding groove 7a is provided with fastening bolts 72 which are pressed against the sector plate 11. After the corners of the sector plate 11 are inserted into the U-shaped groove plate 7, the side edges of the adjacent sector plates 11 are at the same height through the pressing of the fastening bolts 72, thereby solving the influence of the insertion gap on the same splicing surface of the two. At the same time, the fastening bolts 72 can realize the insertion and splicing of sector plates 11 of different specifications and thicknesses, thereby improving the applicability of the welding platform.

[0050] Since the sector plate 11 has a certain curvature in the radial direction, in order to make the corners of the sector plate 11 flatly pressed in the U-shaped groove plate 7, as shown in FIG. Figure 14 As shown, the suspension rod 71 is hinged on the U-shaped groove plate 7. The U-shaped groove plate 7 is rotated according to the curvature of the sector plate 11, so that the corners of the sector plate 11 are flush with the inner bottom surface of the U-shaped groove plate 7, and the hinge between the suspension rod 71 and the U-shaped groove plate 7 is preferably set as a hinge screw 73, and the current position state of the U-shaped groove plate 7 is locked by the hinge screw 73 after the flat position is adjusted.

[0051] In order to adapt to the splicing and clamping of sector plates 11 of different lengths, the cone cover plate 4 is provided with adjustment bar holes (not shown in the figure) for adjusting the suspension rods 71 ​​in the radial direction, and locking nuts 74 are sleeved on the suspension rods 71 ​​located at the upper and lower sides of the cone cover plate 4. The suspension rods 71 ​​are adjusted in the adjustment bar holes on the cone cover plate 4 to adjust the spacing between the U-shaped groove plates 7 at both ends of the sector plate 11, and to achieve welding and clamping of sector plates 11 of different radial lengths, further improving the applicability of the welding operation platform.

[0052] When the fan-shaped plates 11 are spliced ​​on the cone cover plate 4, they are manually clamped and spliced, so the spacing of the welding seams reserved between adjacent fan-shaped plates 11 cannot be accurately controlled for consistency. Figure 19 As shown in FIG. 1 , when the middle sector plate 11 is shifted downward, the welding distance between the middle sector plate 11 and the upper sector plate 11 increases, while the welding distance between the middle sector plate 11 and the lower sector plate 11 decreases, which affects the filling amount of solder in the welding gap and the welding tightness. Therefore, in order to solve this problem, as shown in FIG. Figure 20 As shown, a weld distance plate 8 is also slidably provided on the side wall of the U-shaped groove plate 7 to abut against the side wall of the adjacent sector plate 11. When the sector plates 11 are spliced, the side edge of each sector plate 11 is abutted against the side wall of the weld distance plate 8 to ensure the welding gap between the adjacent sector plates 11, and then the fastening bolts 72 are used to press and fasten the sectors 11. In this way, the distance operation between the multiple sector plates 11 is completed. Then, when welding, as shown in FIG. Figure 21 As shown, the weld distance plate 8 is moved in the direction of the arrow to separate it from the weld seam, thereby preventing it from being welded to the sector plate 11 during welding, thereby effectively improving the welding quality (strength).

[0053] Based on the above welding positioning device, the present application further provides a welding method for the conical cover member 1, including the following steps: S1. Splice the curled fan-shaped plates 11 circumferentially on the surface of the conical cover plate 4. During the splicing process, first move the suspension rod 71 to adjust the position and angle of each U-shaped groove plate 7 on the conical cover plate 4. Then embed the corners where two adjacent fan-shaped plates 11 meet into the U-shaped groove plates 7 to keep them flush, and make the side edges of the fan-shaped plates 11 on each side contact the side wall of the welding distance plate. Adjust the welding distance, and then fasten the corners of the fan-shaped plates 11 through the fastening bolts 72. Fix the corners of multiple fan-shaped plates 11 in the same way.

[0054] S2. Drive the conical cover plate 4 to flip through the PLC control system, so that one end of the welding seam of a single adjacent fan-shaped plate 11 is vertically close to the corresponding welding torch 2.

[0055] S3. During welding, the welding torch 2 moves horizontally, and at the same time, the PLC control system automatically controls the rotation of the conical cover plate 4 and the lifting of the driving cylinder 6, so that the distance between the current welding point and the welding torch 2 remains the same, and the complete welding of a single welding seam is completed in this way.

[0056] S4. After completing the welding of a single welding seam, the PLC control system controls the rotation of the conical cover plate 4 to make the next welding seam correspond to the welding torch 2. Then the welding torch 2 moves in the reset direction and cooperates with the flipping and lifting of the conical cover plate 4 to complete the integral welding of the current welding seam. After completing the welding of all welding seams in the same way, disassemble the formed conical cover member 1.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Without departing from the spirit and protection scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope required to be protected by the present invention.

Claims

1. A welding positioning device for a conical cover member, the conical cover member being formed by welding a plurality of fan-shaped plates with curled arcs after splicing, characterized in that, The welding positioning device includes a welding platform for receiving and placing multiple curled fan-shaped plates. The welding platform fits multiple fan-shaped plates to jointly assemble into an integral conical cover member, and the welding platform can drive the current welding point of adjacent spliced fan-shaped plates to maintain a set welding distance from the welding torch in its movable state.

2. The welding positioning device according to claim 1, characterized in that: The welding platform includes a conical cover plate that fits to form a standard conical cover member. At the bottom of the conical cover plate, support rods with their bottom ends connected are circumferentially spaced. At the connection of the support rods, a vertically liftable drive mechanism is hingedly provided.

3. The welding positioning device according to claim 2, wherein: The rotation action at the hinge of the support rod and the lifting action of the drive mechanism are controlled by a control system.

4. The welding positioning device according to claim 3, wherein: The drive mechanism is rotatably arranged on the ground.

5. The welding positioning device according to claim 4, wherein: On the conical cover plate, a leveling member is provided for joining the two sides of adjacent fan-shaped plates in the same plane along the weld seam.

6. The welding positioning device according to claim 5, characterized in that: The leveling member is a U-shaped groove plate that commonly penetrates into the corners of the joined fan-shaped plates. Suspension rods for suspending it on the surface of the conical cover plate are provided at the bottom of the U-shaped groove plate.

7. A welding positioning device and welding method for a conical cover member, characterized in that, It includes the following steps: S1. Splice the curled fan-shaped plates circumferentially on the surface of the conical cover plate. During the splicing process, embed the two joined corners of adjacent fan-shaped plates into the U-shaped groove plate to keep them flush, and complete the splicing of all fan-shaped plates. S2. Drive the conical cover plate to flip through the control system so that one end of the weld seam of a single adjacent fan-shaped plate approaches the welding torch vertically. S3. The welding torch moves horizontally along the length direction of the weld seam. At the same time, the control system controls the flipping of the conical cover plate and the lifting of the conical cover plate by the drive mechanism, so that the welding torch gradually moves forward along the weld seam and maintains an equal distance from the current welding point. S4. After completing the welding of a single weld seam, horizontally rotate the drive mechanism so that the next weld seam corresponds to the welding torch. Then the welding torch moves in the reverse direction. At the same time, the control system controls the flipping of the conical cover plate and the lifting of the conical cover plate by the drive mechanism again, so that the welding torch gradually moves forward along the weld seam and maintains an equal distance from the current welding point, and sequentially complete the welding operations of multiple weld seams to form an integral conical cover member.

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