A rotary welding device and method

Abstract

The application belongs to the technical field of welding equipment, and in particular to a rotary welding device and method. The rotary welding device drives the rotating disc to rotate through the hollow rotating table, so that the hollow rotating table can be provided with a support rod inside to fix the welding support disc. The work space above the welding support disc is large, and various different types of pipes and flange plates such as straight pipes and bent pipes can be welded. The support cone is provided, different sizes of flange plates can be placed on the support cone, so that the welding of different size flange plates and pipes can be used. The welding gun adjustment platform integrates the front and rear movement coarse adjustment mechanism, the lifting mechanism and the front and rear movement fine adjustment mechanism. The relative position adjustment between the welding gun and the workpiece is flexible and accurate during the welding process, and the accurate requirement of the position of the welding gun during the welding of different size flange plates and pipes can be met. The main controller integrates the control of the welding machine, the wire feeder, the rotary drive motor and the position sensor, has high automation degree, simplifies the operation process and improves the welding efficiency.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment technology, and specifically relates to a rotary welding device and method. Background Technology

[0002] In the shipbuilding industry, a large number of pipe fittings require welding. A major category of welded components is the welding between flanges and pipes. Currently, welding of flanges and pipes requires manual labor, resulting in low efficiency and generating arc light, fumes, and high temperatures, creating a poor welding environment. Existing technologies include a ring-shaped rotary welding device (publication number CN201244711Y) and a valve flange rotary welding device (publication number CN212329942U). However, current rotary welding devices suffer from the following problems: the relative position adjustment between the welding torch and the workpiece is not flexible and precise enough to adapt to the welding requirements of flanges and pipes of different specifications; furthermore, the welding process lacks position monitoring and feedback mechanisms, requiring significant manual intervention; and many pipes are bends, which current rotary welding equipment is not suitable for welding. Summary of the Invention

[0003] The present invention aims to provide a rotary welding device and method to solve the technical problems of existing rotary welding devices, such as insufficient flexibility and precision in adjusting the relative position of the welding torch and the workpiece during the welding process, difficulty in adapting to the welding needs of flanges and pipes of different specifications, lack of position monitoring and feedback mechanism in the welding process, need for more manual intervention, and inability to adapt to pipe bending welding.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A rotary welding apparatus is provided, including a welding machine and a wire feeder for the welding machine. The wire feeder is provided with a welding gun connected to the welding machine via a welding gun cable. The apparatus also includes a rotary worktable, which includes a main support body, a hollow turntable on the main support body, a rotary drive motor on the hollow turntable, and a turntable on the hollow turntable. A suspension is provided on one side of the turntable, a welding torch adjustment platform is provided on the suspension, the wire feeder is set on the welding torch adjustment platform, and a position sensor is provided between the main support body and the turntable; A welding support plate is provided on the upper side of the turntable, and a support cone is provided on the top surface of the welding support plate. The support cone is coaxial with the turntable. An insulating plate is provided at the bottom of the welding support plate. A support rod is provided in the main support body that passes through the hollow turntable. The welding support plate is fixed to the support rod by the insulating plate at the bottom. A clamp is provided above the supporting cone, and a side bracket is provided on the main support body. The clamp is mounted on the side bracket. It also includes a main controller, and the welding machine, wire feeder, rotary drive motor, and position sensor are electrically connected to the main controller.

[0005] Preferably, the welding torch adjustment platform includes a coarse adjustment mechanism for forward and backward movement at the bottom, a lifting mechanism is provided on the coarse adjustment mechanism for forward and backward movement, and a fine adjustment mechanism for forward and backward movement is provided on the lifting mechanism.

[0006] Preferably, the coarse adjustment mechanism for forward and backward movement includes a coarse adjustment bracket, a lead screw drive unit is provided in the coarse adjustment bracket, a coarse adjustment moving stage is provided on the lead screw drive unit, a forward and backward movement drive motor is provided on the rear side of the lead screw drive unit, and the forward and backward movement drive motor is electrically connected to the main controller.

[0007] Preferably, the lifting mechanism includes a scissor lift unit, which is connected to a lifting adjustment screw, and a lifting adjustment knob is provided on the rear side of the lifting adjustment screw.

[0008] Preferably, the forward and backward fine-tuning mechanism includes a fine-tuning bracket, a screw drive unit is provided in the fine-tuning bracket, a fine-tuning moving stage is provided on the screw drive unit, and a fine-tuning knob is provided on the rear side of the screw drive unit.

[0009] Preferably, the grounding clamp of the welding machine is located next to the clamp, and the grounding clamp is connected to the welding machine via a return cable; the main controller is located on the side bracket; and the wire feeder's wire spool is located at the bottom of the suspension.

[0010] Preferably, the clamp includes a pneumatic gripper, and rollers are respectively provided on the front side of the cylinder body of the pneumatic gripper and on the inner side of the front end of the two grippers of the pneumatic gripper.

[0011] Preferably, the midpoint of the line connecting the axes of the rollers on the two grippers of the pneumatic gripper is located on the axis of the support cone.

[0012] Preferably, the position sensor is shielded on the underside of the welding support plate.

[0013] The present invention also provides a rotary welding method for welding flanges and pipes using the rotary welding apparatus described above, comprising: Flange and pipe positioning: The flange is placed on the support cone, and the pipe is placed on the flange so that the lower end of the pipe is connected to the flange. The upper part of the pipe is clamped by the clamp to make the flange and the pipe firmly connected. Welding parameter adjustment: The initial position of the turntable rotation is set by the main controller, which sets the wire feeding speed parameter of the wire feeder, the rotation speed parameter of the turntable, and the rotation angle parameter of the turntable. Welding torch position adjustment: Based on the size of the flange and the pipe, the position of the welding torch on the wire feeder is adjusted using the welding torch adjustment platform so that the front end of the welding torch is close to the welding position between the flange and the pipe; during the adjustment of the front and back position of the welding torch on the wire feeder, the front and back position of the welding torch is first coarsely adjusted using the front and back movement coarse adjustment mechanism, and then finely adjusted using the front and back movement fine adjustment mechanism; Connect the grounding clamp: clamp the grounding clamp of the welding machine onto the pipe; Welding of flanges and pipes: The main controller controls the welding machine, wire feeder and rotary drive motor to start synchronously to perform circumferential welding on the flanges and pipes. During the welding process, the position sensor senses the rotation angle of the turntable. The turntable stops when it reaches the preset rotation angle parameter.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The rotary welding device uses a hollow turntable to drive the turntable to rotate, allowing support rods to be installed inside the hollow turntable to fix the welding support plate. The working space above the welding support plate is large, and it can weld various types of pipes and flanges, such as straight pipes and bent pipes. By setting a support cone, flanges of different sizes can be placed on the support cone, so it can be used to weld flanges and pipes of different sizes.

[0015] 2. The welding torch adjustment platform integrates a coarse adjustment mechanism (forward and backward movement), a lifting mechanism, and a fine adjustment mechanism (forward and backward movement), enabling high-precision position adjustment of the welding torch. The coarse adjustment mechanism is driven by a servo motor, offering fast adjustment speed and a large adjustment range. The fine adjustment mechanism uses a manual knob with threaded transmission, ensuring high adjustment accuracy. During welding, the relative position of the welding torch and the workpiece is adjusted flexibly and precisely, meeting the precise positional requirements for welding torches on flanges and pipes of different sizes.

[0016] 4. The hollow turntable drives the rotating disk, which in turn drives the welding torch to perform circumferential welding around the fixed flange and pipe. The welding process is stable and can effectively ensure the roundness and consistency of the welding trajectory, thus guaranteeing welding quality. At the same time, the support cone is coaxially set with the turntable to ensure that the rotation axis of the welding torch coincides with the axis of the workpiece, avoiding defects caused by eccentric welding.

[0017] 5. The main controller integrates the control of the welding machine, wire feeder, rotary drive motor and position sensor. Parameter setting and operation are realized through the touch screen. It has a high degree of automation, simplifies the operation process and improves welding efficiency. Attached Figure Description

[0018] The present invention will be explained in detail below with reference to the accompanying drawings. It should be noted that the drawings are used to provide a further understanding of the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but should not impose any limitation on the implementability of the present invention.

[0019] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the rotary welding device of the present invention.

[0020] Figure 2 This is a partial cross-sectional view of the main support body in one embodiment of the rotary welding device of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the welding torch adjustment platform in one embodiment of the rotary welding device of the present invention.

[0022] Figure 4 This is a schematic diagram of the fixture in one embodiment of the rotary welding apparatus of the present invention.

[0023] Figure 5 This is a front view of the main support body in one embodiment of the rotary welding apparatus of the present invention. Detailed Implementation

[0024] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0025] In one embodiment, a rotary welding apparatus is provided, such as Figure 1 As shown, the rotary welding device includes a welding machine 10 and a wire feeder 20 that is matched with the welding machine 10. The wire feeder 20 is equipped with a welding gun 12 that is connected to the welding machine 10 via a welding gun cable 11. During the welding process, the welding wire is delivered to the welding gun 12 by the wire feeder 20.

[0026] like Figure 1 As shown, the rotary welding apparatus also includes a rotary worktable 30, which includes a main support body 31, as... Figure 2As shown, a hollow turntable 32 is provided on the main support body 31. The main support body 31 is cylindrical, and the hollow turntable 32 is located inside the main support body 31. The hollow turntable 32 is a commercially available accessory. Its main feature is that it has a rotating ring so that other components can pass through the rotating ring. The hollow turntable 32 is equipped with a rotary drive motor 321, and a turntable 33 is provided on the hollow turntable 32. The rotary drive motor 321 drives the hollow turntable 32 to rotate, thereby driving the turntable 33 to rotate.

[0027] like Figure 1 As shown, a suspension 34 is provided on one side of the turntable 33. The suspension 34 is fixed to the edge of the turntable 33. A welding torch adjustment platform 40 is provided on the suspension 34. The wire feeder 20 is set on the welding torch adjustment platform 40. The welding torch adjustment platform 40 adjusts the position of the front end of the welding torch 12 by adjusting the position of the wire feeder 20, so that the welding torch 12 can be adjusted to a suitable welding position for workpieces of different sizes. Figure 2 As shown, a position sensor 35 is provided between the main support 31 and the turntable 33. The position sensor 35 is used to sense the angle of rotation of the turntable 33 relative to the main support 31.

[0028] The turntable 33 can drive the suspension 34 to rotate, which in turn drives the wire feeder 20 to rotate. The wire feeder 20 then drives the welding torch 12 to rotate, thus achieving rotary welding, which can be used for welding flanges and pipes.

[0029] like Figure 2 As shown, a welding support plate 36 is provided on the upper side of the turntable 33, and an insulating plate 361 is provided at the bottom of the welding support plate 36. The welding support plate 36 is a metal plate. The insulating plate 261 insulates the welding support plate 36 from the main support body 31 to prevent it from affecting the welding.

[0030] like Figure 2 As shown, the welding support plate 36 is relatively large, which causes the position sensor 35 to be shielded on the underside of the welding support plate 36, thus preventing the position sensor 35 from being damaged by the high temperature generated during the welding torch 12 burning the welding wire.

[0031] like Figure 2 As shown, a support cone 37 is provided in the middle of the top surface of the welding support plate 36. The top of the support cone 37 is connected to the welding support plate 36 by screws. The support cone 37 can support flanges of different sizes. The support cone 37 is coaxial with the turntable 33. Thus, during the rotation of the turntable 33, the turntable 33 drives the welding torch 12 to rotate and weld around the axis of the support cone 37. There will be no eccentricity, so that the welding position remains accurate during the rotation.

[0032] like Figure 2As shown, the main support body 31 is provided with a support rod 38 that passes through the hollow turntable 32. The bottom of the support rod 38 is fixed to the support body 31. The welding support plate 36 is fixed to the support rod 38 by the bottom insulating plate 361. The welding support plate 36 is fixed and supported by the support rod 38, and the welding support plate 36 is fixed and cannot be moved.

[0033] like Figure 1 As shown, a clamp 50 is provided above the support cone 37, and a side bracket 39 is provided on the main support body 31. The side bracket 39 is C-shaped, and the bottom of the side bracket 39 is fixed to the side of the main support body 31. The clamp 50 is set on the side bracket 39.

[0034] During welding, the flange is supported by the support cone 37, the flange is fitted onto the support cone 37, and then the pipe is connected to the flange. The upper part of the pipe is then clamped by the clamp 50 to keep the flange and the pipe fixed. The welding torch 12 is rotated around the connection position between the flange and the pipe by the turntable 33 to perform welding.

[0035] like Figure 1 As shown, the rotary welding device also includes a main controller 60, which has a touch screen. The welding machine 10, wire feeder 20, rotary drive motor 321, and position sensor 35 are electrically connected to the main controller 60, and are used to control the welding machine 10, wire feeder 20, and rotary drive motor 321 to cooperate with each other to perform welding work.

[0036] like Figure 3 As shown, the welding torch adjustment platform 40 of the rotary welding device includes a coarse adjustment mechanism 41 for forward and backward movement at the bottom, a lifting mechanism 42 on the coarse adjustment mechanism 41, and a fine adjustment mechanism 43 for forward and backward movement on the lifting mechanism 42. The coarse adjustment mechanism 41 is used to coarsely adjust the forward and backward position of the welding torch 12, and the adjustment range is large and the adjustment speed is fast. The lifting mechanism 42 is used to adjust the height of the welding torch 12. The fine adjustment mechanism 43 is used to finely adjust the forward and backward position of the welding torch 12, and the adjustment range is small, the adjustment speed is slow, and the adjustment accuracy is high.

[0037] like Figure 3As shown, the coarse adjustment mechanism 41 for forward and backward movement includes a coarse adjustment bracket 411, which is fixed on the suspension 34. A lead screw drive unit 412 is provided in the coarse adjustment bracket 411. The lead screw drive unit 412 includes a lead screw that is rotatably mounted on the coarse adjustment bracket 411 via a bearing. A matching coarse adjustment nut block is provided on the lead screw. A coarse adjustment moving platform 413 is provided on the lead screw drive unit 412 and is connected to the coarse adjustment nut block. A slide rail parallel to the lead screw is provided in the coarse adjustment bracket 411. The bottom of the coarse adjustment moving platform 413 is mounted on the slide rail via a slider. A forward and backward movement drive motor 414 is provided on the rear side of the lead screw drive unit 412 and is electrically connected to the main controller 60.

[0038] The forward and backward movement drive motor 414 drives the lead screw to rotate, which in turn moves the coarse adjustment nut block forward and backward. The coarse adjustment nut block then moves the coarse adjustment moving table 413 forward and backward along the slide rail at the bottom. The forward and backward movement drive motor 414 is a servo motor, and the number of rotations of the forward and backward movement drive motor 414 can be controlled by the main controller 60, thereby controlling the forward and backward movement distance of the coarse adjustment nut block in the lead screw drive unit 412.

[0039] like Figure 3 As shown, the lifting mechanism 42 includes a scissor lift unit 421, which is connected to a lifting adjustment screw 422. A lifting adjustment knob 423 is provided on the rear side of the lifting adjustment screw 422.

[0040] The bottom of the scissor lift unit 421 is fixed on the coarse adjustment moving platform 413. The scissor lift unit 421 includes upper and lower support plates. Two sets of hinged cross rods are provided between the upper and lower support plates. The right ends of the two sets of cross rods are slidably mounted on the upper and lower support plates of the scissor lift unit 421, respectively. The right side of the two sets of cross rods is connected to the lifting connecting rod 424. One end of the lifting connecting rod 424 is hinged to the lifting adjusting nut 425. The lifting adjusting screw 422 is provided with two opposite threads. One thread matches the lifting adjusting nut 425, and the other thread matches and connects to the hinged rod at the intersection of the two sets of cross rods.

[0041] Rotating the lifting adjustment knob 423 and the lifting adjustment screw 422 allows the lifting adjustment nut 425 to move closer to or further away from the hinge rod at the intersection of the two sets of cross rods, causing the lifting connecting rod 424 to drive the two sets of cross rods to rise or fall. The threaded adjustment of the lifting adjustment screw 422 allows for precise height adjustment.

[0042] In other embodiments, the lifting mechanism 42 may also employ other height-adjustable mechanisms such as a scissor jack structure.

[0043] like Figure 3As shown, the forward and backward moving fine adjustment mechanism 43 includes a fine adjustment bracket 431, which is fixed on the lifting mechanism 42. A screw drive unit 432 is provided in the fine adjustment bracket 431. The screw drive unit 432 includes a screw that is rotatably mounted on the fine adjustment bracket 431 via a bearing. A matching fine adjustment nut block is provided on the screw. A fine adjustment moving platform 433 is provided on the screw drive unit 432. The fine adjustment moving platform 433 is connected to the fine adjustment nut block. A fine adjustment knob 435 is provided on the rear side of the screw drive unit 432.

[0044] The fine-tuning bracket 431 is provided with a slide rail parallel to the screw. The bottom of the fine-tuning moving table 433 is mounted on the slide rail via a slider. By rotating the screw with the fine-tuning knob 435, the screw drives the fine-tuning nut block to move back and forth, and the fine-tuning nut block then drives the fine-tuning moving table 433 to move back and forth along the slide rail at the bottom.

[0045] The wire feeder 20 is fixed on the fine adjustment moving table 433. The fine adjustment mechanism 43 moves back and forth and is adjusted by thread, which has high adjustment accuracy.

[0046] Combination Figure 1 As shown, the grounding clamp 13 of the welding machine 10 of the rotary welding device is located next to the clamp 50, which facilitates clamping the pipe through the grounding clamp 13; the grounding clamp 13 is connected to the welding machine 10 through the return cable 14; the main controller 60 is located on the side bracket 39, and a rotating base is provided on the side bracket 39, and the main controller 60 is located on the rotating base; the wire spool 21 of the wire feeder 20 is connected to the bottom of the suspension 34, which facilitates the wire spool 21 to be connected to the wire feeder 20 through the wire guide tube.

[0047] like Figure 4 As shown, the clamp 50 of the rotary welding device includes a pneumatic gripper, which includes a cylinder body 51. Two grippers 52 are provided on the front side of the cylinder body 51. After the cylinder body 51 is connected to a pneumatic system, the two grippers 52 can be controlled to clamp or open. Rollers 54 are provided on the front side of the cylinder body 51 and the inner sides of the front ends of the two grippers 52, respectively. By providing rollers 54, it is convenient to clamp the pipe. Furthermore, in this embodiment, the midpoint of the line connecting the axes of the rollers 54 on the two grippers 52 is located on the axis of the support cone 37. Thus, when the pipe is connected to a flange placed on the support cone 37, the rollers 54 on the two grippers 52 can clamp the upper part of the pipe from the left and right sides, keeping the pipe coaxial with the flange. If the pipe is thin, the rollers 54 on the inner sides of the front ends of the two grippers 52 can clamp the pipe. If the pipe is thicker, the rollers 54 on the front side of the cylinder body 51 can support the pipe from the rear, keeping the pipe stable.

[0048] In addition, such as Figure 5 As shown, the front side of the main support body 31 is provided with an inspection port 311 and a cable outlet 312 for convenient maintenance and wiring.

[0049] In one embodiment, a rotary welding method is provided for welding flanges and pipes using the rotary welding apparatus described in the preceding embodiments, comprising: (1) Positioning of flange and pipe: Set the flange on the support cone and the pipe on the flange so that the lower end of the pipe is connected to the flange. Then, clamp the upper part of the pipe with a clamp to make the flange and pipe firmly connected.

[0050] (2) Welding parameter adjustment: Set the initial position of the turntable rotation, and set the wire feeding speed parameter of the wire feeder, the rotation speed parameter of the turntable, and the rotation angle parameter of the turntable through the main controller.

[0051] In the parameter settings, parameters such as welding current, voltage, wire feeding speed, and preset rotation angle of the turntable can be set on the touch screen of the main controller. The rotation angle parameters include how many degrees to rotate forward and reverse, and whether to rotate forward first and then reverse.

[0052] (3) Welding torch position adjustment: According to the size of the flange and the pipe, adjust the position of the welding torch on the wire feeder through the welding torch adjustment platform so that the front end of the welding torch is close to the welding position between the flange and the pipe; in the process of adjusting the front and back position of the welding torch on the wire feeder, first make a coarse adjustment to the front and back position of the welding torch through the front and back movement coarse adjustment mechanism, and then make a fine adjustment to the front and back position of the welding torch through the front and back movement fine adjustment mechanism.

[0053] During the welding torch position adjustment, the main controller starts the forward and backward movement drive motor, which drives the screw drive unit to move the coarse adjustment moving table to achieve coarse adjustment of the welding torch position, quickly moving the welding torch close to the welding area; then, the fine adjustment knob is turned, and the screw drive unit drives the fine adjustment moving table for fine adjustment; then, the lifting adjustment knob is turned, and the height of the welding torch is adjusted through the scissor-type lifting unit to align the welding torch with the welding joint, ensuring that the distance between the front end of the welding torch and the mating position of the flange and pipe meets the preset welding process requirements; (4) Connect the grounding clamp: clamp the grounding clamp of the welding machine onto the pipe.

[0054] Because some pipes are thicker, the grounding clamp can be attached to the rear end of the pipe.

[0055] (5) Welding of flanges and pipes: The welding machine, wire feeder and rotary drive motor are started synchronously by the main controller to perform circumferential welding on the flanges and pipes. During the welding process, the rotation angle of the turntable is sensed by the position sensor. When the rotation angle of the turntable reaches the preset rotation angle parameter, it stops.

[0056] After confirming that the previous steps were performed correctly, the welding program is started. The main controller controls the welding machine and wire feeder to work. The welding torch generates an electric arc to ignite the welding wire. At the same time, it controls the rotary drive motor to drive the hollow turntable to rotate. The turntable, through the suspension, drives the welding torch to rotate and weld around the joint between the flange and the pipe. During the welding process, the position sensor senses the rotation angle of the turntable in real time and feeds the signal back to the main controller. When the rotation angle of the turntable reaches the preset parameter, the main controller controls the rotary drive motor to stop rotating and shuts down the welding machine and wire feeder, completing one welding operation. If multi-layer and multi-pass welding is required, the previous welding steps can be repeated, and the welding torch position and related parameters can be adjusted before continuing welding.

[0057] Based on the preceding embodiments, the rotary welding device has the following characteristics during use: The rotary welding device uses a hollow turntable to rotate the turntable, allowing support rods to be installed inside the hollow turntable to fix the welding support plate. The working space above the welding support plate is large, enabling welding of various types of pipes and flanges, such as straight pipes and bent pipes. By setting a support cone, flanges of different sizes can be placed on the support cone, thus enabling welding of flanges and pipes of different sizes.

[0058] The welding torch adjustment platform integrates a coarse adjustment mechanism (forward and backward movement), a lifting mechanism, and a fine adjustment mechanism (forward and backward movement), enabling high-precision position adjustment of the welding torch. The coarse adjustment mechanism is driven by a servo motor, offering fast adjustment speed and a large adjustment range. The fine adjustment mechanism uses a manual knob combined with threaded transmission, ensuring high adjustment accuracy. During welding, the relative position of the welding torch and the workpiece is adjusted flexibly and precisely, meeting the precise positional requirements for welding torches of different sized flanges and pipes.

[0059] The hollow turntable drives the rotating disk, which in turn moves the welding torch to perform circumferential welding around the fixed flange and pipe. The welding process is stable, effectively ensuring the roundness and consistency of the welding trajectory and guaranteeing welding quality. At the same time, the support cone is coaxially set with the turntable, ensuring that the rotation axis of the welding torch coincides with the axis of the workpiece, avoiding defects caused by eccentric welding.

[0060] The main controller integrates the control of the welding machine, wire feeder, rotary drive motor and position sensor. Parameter settings and operations are achieved through a touch screen, which has a high degree of automation, simplifies the operation process and improves welding efficiency.

[0061] The position sensor is positioned under the welding support plate and shielded from damage caused by the high temperatures, sparks, and spatter generated during welding. The welding support plate is insulated from the main support body by an insulating plate, preventing welding current from being conducted through the support structure and avoiding interference or damage to other components of the equipment, thus ensuring the safety and stability of the welding process.

[0062] The clamp adopts a pneumatic gripper structure and rollers are set on the front side of the gripper and cylinder body. This not only firmly clamps pipes of different diameters and prevents workpiece displacement during welding, but the roller design also reduces scratches on the pipe surface. At the same time, the midpoint of the line connecting the axes of the rollers on the gripper is located on the axis of the support cone, further ensuring the coaxiality of the pipe and the flange.

[0063] It should be noted that, unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains, and terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art. It should also be understood that the above is a description of the disclosure and should not be considered as a limitation thereof. Although several exemplary embodiments of the disclosure have been described, those skilled in the art will readily understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention. Therefore, all such modifications are intended to be included within the scope of the disclosure as defined in the claims, and will not be detailed here.

Claims

1. A rotary welding device, comprising a welding machine and a wire feeder supporting the welding machine. A welding torch is provided on the wire feeder and connected to the welding machine through a welding torch cable. It is characterized in that: It also includes a rotary worktable, which includes a main support body, a hollow turntable on the main support body, a rotary drive motor on the hollow turntable, and a turntable on the hollow turntable; A suspension is provided on one side of the turntable, a welding torch adjustment platform is provided on the suspension, the wire feeder is set on the welding torch adjustment platform, and a position sensor is provided between the main support body and the turntable; A welding support plate is provided on the upper side of the turntable, and a support cone is provided on the top surface of the welding support plate. The support cone is coaxial with the turntable. An insulating plate is provided at the bottom of the welding support plate. A support rod is provided in the main support body that passes through the hollow turntable. The welding support plate is fixed to the support rod by the insulating plate at the bottom. A clamp is provided above the supporting cone, and a side bracket is provided on the main support body. The clamp is mounted on the side bracket. It also includes a main controller, and the welding machine, wire feeder, rotary drive motor, and position sensor are electrically connected to the main controller.

2. The rotary welding apparatus according to claim 1, characterized in that: The welding torch adjustment platform includes a coarse adjustment mechanism for forward and backward movement at the bottom, a lifting mechanism on the coarse adjustment mechanism for forward and backward movement, and a fine adjustment mechanism for forward and backward movement on the lifting mechanism.

3. The rotary welding apparatus according to claim 2, characterized in that: The coarse adjustment mechanism for forward and backward movement includes a coarse adjustment bracket, a lead screw drive unit is provided in the coarse adjustment bracket, a coarse adjustment moving platform is provided on the lead screw drive unit, and a forward and backward movement drive motor is provided on the rear side of the lead screw drive unit. The forward and backward movement drive motor is electrically connected to the main controller.

4. The rotary welding apparatus according to claim 3, characterized in that: The lifting mechanism includes a scissor lift unit, which is connected to a lifting adjustment screw, and a lifting adjustment knob is provided on the rear side of the lifting adjustment screw.

5. The rotary welding apparatus according to claim 4, characterized in that: The forward and backward fine-tuning mechanism includes a fine-tuning bracket, a screw drive unit is provided in the fine-tuning bracket, a fine-tuning moving stage is provided on the screw drive unit, and a fine-tuning knob is provided on the rear side of the screw drive unit.

6. The rotary welding apparatus according to claim 1, characterized in that: The grounding clamp of the welding machine is located next to the clamp, and the grounding clamp is connected to the welding machine via a return cable; the main controller is located on the side bracket; the wire feeder's wire spool is located at the bottom of the suspension.

7. The rotary welding apparatus according to claim 1, characterized in that: The clamp includes a pneumatic gripper, and rollers are respectively provided on the front side of the cylinder body of the pneumatic gripper and on the inner side of the front end of the two grippers of the pneumatic gripper.

8. The rotary welding apparatus according to claim 7, characterized in that: The midpoint of the line connecting the axes of the rollers on the two grippers of the pneumatic gripper is located on the axis of the support cone.

9. The rotary welding apparatus according to claim 1, characterized in that: The position sensor is shielded on the underside of the welding support plate.

10. A rotary welding method, characterized in that, This method is used for welding flanges and pipes using the rotary welding apparatus of claim 5, comprising: Flange and pipe positioning: The flange is placed on the support cone, and the pipe is placed on the flange so that the lower end of the pipe is connected to the flange. The upper part of the pipe is clamped by the clamp to make the flange and the pipe firmly connected. Welding parameter adjustment: The initial position of the turntable rotation is set by the main controller, which sets the wire feeding speed parameter of the wire feeder, the rotation speed parameter of the turntable, and the rotation angle parameter of the turntable. Welding torch position adjustment: Based on the size of the flange and the pipe, the position of the welding torch on the wire feeder is adjusted using the welding torch adjustment platform so that the front end of the welding torch is close to the welding position between the flange and the pipe; during the adjustment of the front and back position of the welding torch on the wire feeder, the front and back position of the welding torch is first coarsely adjusted using the front and back movement coarse adjustment mechanism, and then finely adjusted using the front and back movement fine adjustment mechanism; Connect the grounding clamp: clamp the grounding clamp of the welding machine onto the pipe; Welding of flanges and pipes: The main controller controls the welding machine, wire feeder and rotary drive motor to start synchronously to perform circumferential welding on the flanges and pipes. During the welding process, the position sensor senses the rotation angle of the turntable. The turntable stops when it reaches the preset rotation angle parameter.

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