Automatic argon arc welding special machine for corrugated pipe universal type compensator

Abstract

The invention provides a corrugated pipe universal compensator argon arc welding automatic special welding machine which is used for conducting argon arc welding operation on corrugated pipe type workpieces and comprises a clamping mechanism, a turnover mechanism, a roller support mechanism, a supporting mechanism, a mechanical walking mechanism, a welding gun and an auxiliary mechanism of the welding gun. The device is reasonable in structural design, higher in automation level, more compact in structure and easy to install, operate and maintain in the later period; meanwhile, due to the stability and accuracy of equipment, welding seams are more attractive in the welding process, the mechanical property is more excellent, and the technological standard requirement is met; and moreover, the operation is relatively simple, the labor intensity of workers is reduced, the working environment is improved, and the possibility of safety accidents is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of argon arc welding automatic welding, and in particular to a special argon arc welding automatic welding machine for a universal bellows compensator. Background Art

[0002] Bellows compensator is a kind of compensating element, which is widely used in industrial pipelines. It uses the effective expansion and contraction of its working body bellows to absorb the dimensional changes of pipelines, conduits, containers, etc. caused by thermal expansion and contraction, or compensate for the axial, lateral and angular displacement of pipelines, conduits, containers, etc. It can also be used to reduce noise and vibration. At the same time, it can compensate for the thermal displacement and mechanical deformation of the pipeline and absorb various mechanical vibrations, which plays a role in reducing the deformation stress of the pipeline and increasing the service life of the pipeline.

[0003] At present, many factories produce bellows compensators by combining manual argon arc welding with automatic welding, which also hides many disadvantages. For example: (1) There are differences in the operating techniques and procedures used in manual welding and automatic welding, which may lead to inconsistency in the welding process and affect the quality of the weld; (2) Parameter adjustment issues. The welding parameters (such as current, welding speed, etc.) of manual operation and automatic equipment need to be coordinated and set. Improper adjustment may lead to welding defects; (3) There may be quality differences between manual and automatic welds, especially in the handover area, which may cause stress concentration and affect the overall strength of the product; (4) Manual welding is relatively slow and is not suitable for large-scale production or projects that need to be completed quickly; (5) Manual welding requires highly skilled welders, which takes a long time and is costly to train. At the same time, switching between different welding methods may make costs difficult to control, and labor and equipment investments have also increased.

[0004] With the rapid development of the heavy industry technology era, the technological progress of my country's pressure pipe manufacturing industry and bellows expansion joint manufacturing industry, the manufacturing technology and manufacturing cost of foreign bellows expansion joints have lost their competitiveness with domestic technology in some major projects, and my country's overseas markets and orders are constantly expanding. Therefore, enterprises are eager to improve the level of automation and product quality, so the design of a bellows universal compensator automatic welding machine is essential. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to overcome the defects of low automation level, complicated operation, low work efficiency and high cost in the prior art, the present invention provides a special automatic welding machine for argon arc welding of a universal compensator for bellows, which effectively improves the production efficiency and automation level, can effectively clamp the workpiece and adjust the angle of the workpiece, facilitates argon arc welding at any angle, and provides compensation for long-cylindrical workpieces, further improving the welding quality of long-cylindrical workpieces.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a bellows universal compensator argon arc welding automatic welding machine, which is used to perform argon arc welding operations on bellows workpieces, including a clamping mechanism, a flipping mechanism, a roller bracket mechanism, a supporting mechanism, a mechanical walking mechanism and a welding gun and its accessories; the supporting mechanism includes a base, the clamping mechanism includes a clamping jaw device that can adjust the clamping workpiece, the flipping mechanism includes a chuck, the clamping jaw device is arranged on the chuck, the chuck is arranged on the base and drives the clamping jaw to flip adjustable relative to the base angle, the roller bracket mechanism is arranged on the base and corresponds to the direction of the clamping jaw clamping the workpiece, and is arranged in the axial extension direction of the workpiece; the mechanical walking mechanism is arranged on the side of the base along the axial extension direction of the workpiece, and includes a vertical arm and a crawler mechanism, the vertical arm is driven by the crawler mechanism to move along the axial direction of the workpiece, and the welding gun and its accessories are arranged on the vertical arm and move up and down along the vertical arm.

[0007] In the above scheme, in view of the shape characteristics of the bellows workpiece, the mechanical walking mechanism is used in conjunction with the welding gun and its auxiliary mechanism to perform argon arc welding on the workpiece clamped by the clamping mechanism. During the clamping process, the workpiece can be effectively clamped by the clamping claw device, and the workpiece angle can be adjusted relative to the horizontal plane by the flipping mechanism. At the same time, the roller support mechanism arranged in the extension direction of the workpiece can provide support for the workpiece in the axial direction, so as to further stabilize the workpiece and improve the welding quality.

[0008] Furthermore, the supporting mechanism comprises a first fixed flipping mechanism base and a second fixed flipping mechanism base arranged in pair, and the flipping mechanism is rotatably arranged between the first fixed flipping mechanism base and the second fixed flipping mechanism base.

[0009] Furthermore, the flip mechanism includes a base and a worm gear reducer, the output end of the worm gear reducer is connected to the base and drives the base to rotate; the base is provided with a rotating gear and a rotating servo motor driving the rotating gear to rotate, and the outer periphery of the chuck is fixed with a rotating gear ring meshing with the rotating gear. The angle of the workpiece relative to the horizontal plane can be adjusted by the worm gear reducer, and the rotating servo motor can also be used to drive the workpiece to rotate, which is convenient for argon arc welding operation.

[0010] Furthermore, the housing of the worm gear reducer is also provided with a hand wheel for manually driving the output end of the worm gear reducer to move. Through the hand wheel, the flip angle of the clamping mechanism can be manually adjusted, so as to further improve the stability and accuracy of the device.

[0011] Furthermore, the clamping mechanism includes a clamping shell, a clamping servo motor, a spur gear and at least three groups of clamping jaw devices; the clamping shell is fixed on the chuck, the spur gear is rotatably arranged on the clamping shell, and the clamping servo motor is arranged on the clamping shell and drives the spur gear to rotate; each group of clamping jaw devices includes a positioning guide rail, a positioning pin shaft, a positioning slider and a sliding block, and the clamping jaw devices are distributed on the clamping shell in a circular and equiangular manner with the center of the spur gear as a circle, the bottom of the positioning slider is slidably matched with the positioning guide rail, the positioning pin shaft is penetrated and arranged on the positioning slider and the two ends of the positioning pin shaft are rotatably matched with the clamping shell, the side surface of the positioning slider has a tooth shape that meshes with the spur gear ring, the top of the positioning slider has a tooth shape that is tangentially arranged to the circumference of the spur gear ring, and the bottom of the sliding block has a tooth shape that meshes with the tooth shape at the top of the positioning slider, and the rotation of the spur gear ring drives the positioning slider to move along the positioning guide rail, thereby driving the sliding block to perform telescopic movement along the radial direction of the spur gear ring. When clamping the workpiece, the clamping servo motor drives the spur gear ring to rotate, and the positioning slider engaged with the spur gear ring moves tangentially along the spur gear ring under the positioning guidance of the positioning guide rail and the positioning pin shaft, which in turn drives the sliding block above the positioning slider to telescopically move along the radial direction of the spur gear ring, thereby realizing three-jaw adjustable clamping of the workpiece.

[0012] Furthermore, the roller bracket mechanism includes a moving trolley, a roller bracket, a height adjustment bolt and a positioning nut; the moving trolley is provided with moving wheels at both ends, and the moving trolley is driven by the moving wheels to move along the axial direction of the workpiece; the moving trolley is provided with a threaded hole in the vertical direction, the height adjustment bolt is threadedly matched with the threaded hole, the positioning nut is threadedly arranged on the height adjustment bolt extending from the upper end surface of the moving trolley, and the roller bracket is rotatably arranged on the upper end surface of the height adjustment bolt and axially positioned with the height adjustment bolt; the roller bracket is provided with at least two groups of support rollers, and a support gap for supporting the workpiece is formed between the two adjacent groups of support rollers along the axial extension direction of the workpiece. By setting the height adjustment bolt and the positioning nut, the extension height of the height adjustment bolt relative to the moving trolley can be adjusted, so that the support height of the support roller can be adjusted corresponding to the height of the workpiece. The support gap formed between the support rollers can provide space for the passage and support placement of the workpiece, and the support rollers can rotate relative to the roller bracket, so that when the workpiece is clamped and rotated, the support rollers can rotate with it, avoiding excessive resistance with the workpiece and affecting the rotation of the workpiece.

[0013] Furthermore, each group of supporting rollers includes two coaxially arranged supporting rollers, and the two supporting rollers are rotatably arranged at two ends of the roller bracket along the axial extension direction of the workpiece.

[0014] Preferably, in the height adjustment of the roller bracket, the mobile trolley has optical axes penetrating on both sides of the height adjustment bolts, upper positioning plates are fixed to the upper ends of the optical axes on both sides, and lower positioning plates are fixed to the lower ends, the lower ends of the height adjustment bolts are rotatably connected to the lower positioning plates and are axially positioned by the lower positioning plates, and the upper ends of the height adjustment bolts penetrate and extend out of the upper positioning plates and are rotatably matched with the roller bracket. The setting of the optical axis can play an effective guiding and positioning effect for the height adjustment of the height adjustment bolts relative to the mobile trolley.

[0015] Furthermore, the mechanical walking mechanism includes a walking connecting plate, a walking track is fixed on the side of the base, the walking connecting plate is slidably arranged on the walking track, the vertical arm is fixed on the walking connecting plate, and the moving end of the crawler mechanism is fixed to the vertical arm.

[0016] Furthermore, the welding gun and its auxiliary mechanisms include a welding feed connecting plate, a welding arm, a welding gun body, a welding feed reducer and a wire wheel; the vertical arm is provided with upper and lower guide rails in the height direction, and the welding feed connecting plate is slidably arranged on the upper and lower guide rails. The vertical arm is also provided with upper and lower racks parallel to the upper and lower guide rails. The welding feed connecting plate is rotatably provided with upper and lower gears, and the upper and lower gears are meshed with the upper and lower racks. The welding feed connecting plate is provided with upper and lower servo motors for driving the upper and lower gears to rotate; the welding feed reducer is fixed on the welding feed connecting plate, and the welding arm is arranged at the output end of the welding feed reducer, and the welding gun body is clamped and arranged at the outer end of the welding arm, and the welding feed reducer is provided with a wire feeding tube, and the wire wheel is rotatably arranged on the welding feed connecting plate, the metal wire is wound on the wire wheel, and one end of the metal wire is transported to the muzzle of the welding gun body after passing through the wire feeding tube.

[0017] The beneficial effects of the present invention are that the present invention provides a special automatic welding machine for argon arc welding of a universal bellows compensator, which has a higher level of automation, a more compact structure, and is easy to install, operate, and maintain later; at the same time, due to the stability and accuracy of the equipment, the weld is more beautiful during the welding process, the mechanical properties are also more superior, and the process standards are met; and the operation is relatively simple, which reduces the labor intensity of the staff, improves the working environment, and reduces the possibility of safety accidents.

[0018] (1) It can realize the spatial curve welding of bellows compensators of large quantities, multiple specifications and multiple types, thus improving the production efficiency and automation level;

[0019] (2) Through the cooperation of the flipping mechanism and the clamping mechanism, the clamping, locking, flipping and supporting of the workpiece are greatly consistent and stable, and the quality of welding is also guaranteed.

[0020] (3) Through the coordination of the mechanical walking mechanism, the welding gun and its auxiliary mechanisms, the specific position of the welding gun and the specific speed of wire feeding are strictly and accurately controlled, and welding can be completed at any angle. The movement is also very fast, and the relative position of the welding gun and the weld can be controlled in real time, so that the relative position of the welding gun and the weld always meets the process specification requirements. The operation is relatively simple, which greatly improves productivity and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a structural schematic diagram of the best embodiment of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the clamping mechanism in the optimal embodiment of the present invention after removing part of the clamping shell.

[0024] Figure 3 It is a structural schematic diagram of the turning mechanism in the optimal embodiment of the present invention.

[0025] Figure 4 It is a structural schematic diagram of the roller bracket mechanism in the optimal embodiment of the present invention.

[0026] Figure 5 It is a structural schematic diagram of the mechanical walking mechanism and part of the welding gun and its auxiliary mechanisms in the optimal embodiment of the present invention.

[0027] Figure 6 It is a structural schematic diagram of a welding gun and its auxiliary mechanism in the best embodiment of the present invention.

[0028] In the figure, 1, clamping mechanism 101, spur gear 102, sliding block 103, positioning guide rail 104, clamping housing 105, clamping servo motor 106, positioning pin 2, flipping mechanism 201, chuck 202, base 203, rotating servo motor 206, worm gear reducer 207, hand wheel 3, roller bracket mechanism 301, supporting roller 302, roller bracket 303, positioning nut 304, moving trolley 305, lower positioning plate 306, height adjustment bolt 307, upper positioning plate 308, optical axis 4, supporting mechanism 401, base 402, first fixed flip mechanism base 403, second fixed flip mechanism base 5, mechanical walking mechanism 501, crawler mechanism 502, walking connecting plate 503, walking servo motor 504, vertical arm 505, upper and lower servo motor 506, upper and lower guide rails 507, upper and lower racks 508, welding feeding connecting plate 509, walking track 6, welding gun and its accessories 601, wire wheel 602, welding feeding reducer 603, wire feeding tube 604, welding feeding servo motor 605, welding arm 606, welding gun body. DETAILED DESCRIPTION

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0030] like Figures 1 to 6 The argon arc welding automatic welding machine for a bellows universal compensator is the best embodiment of the present invention. The machine provided in this embodiment can be used to weld spherical or small-height compensators, and can also be used to weld long-tube compensators.

[0031] The bellows universal compensator argon arc welding automatic welding machine comprises six parts: a clamping mechanism 1, a turning mechanism 2, a roller bracket mechanism 3, a supporting mechanism 4, a mechanical walking mechanism 5, and a welding gun and its auxiliary mechanism 6.

[0032] Specifically, the support mechanism 4 is composed of a base and a first fixed flip mechanism base 402 and a second fixed flip mechanism base 403 arranged in pairs. The base as a whole plays a supporting role, and the first fixed flip mechanism base 402 and the second fixed flip mechanism base 403 play a supporting role for the flip mechanism 2.

[0033] The clamping mechanism 1 is composed of a clamping housing 104, a clamping servo motor 105, a spur gear 101 and three sets of clamping jaw devices. The spur gear 101 is rotatably arranged on the clamping housing 104. The clamping servo motor 105 is arranged on the clamping housing 104 and drives the spur gear 101 to rotate. The clamping jaw devices are distributed on the clamping housing 104 in a circular manner with the spur gear 101 as the center and at equal angles. Each set of clamping jaw devices includes a positioning guide rail 103, a positioning pin shaft 106, a positioning slider and a sliding block 102. The bottom of the positioning slider is slidably matched with the positioning guide rail 103. The positioning pin shaft 106 is arranged on the positioning slider through and the two ends of the positioning pin shaft 106 are rotatably matched with the clamping shell 104. The side of the positioning slider has a tooth shape that meshes with the spur gear ring, and the top of the positioning slider has a tooth shape that is tangentially arranged in the circumferential direction of the spur gear ring. The bottom of the sliding block 102 has a tooth shape that meshes with the tooth shape at the top of the positioning slider. The rotation of the spur gear ring drives the positioning slider to move along the positioning guide rail 103, thereby driving the sliding block 102 to perform telescopic movement along the radial direction of the spur gear ring, thereby realizing the tensioning function of the clamping jaw device. At the same time, if the positioning pin 106 is designed to be a pin with an external thread, and the hole for the sliding block 102 to cooperate with the positioning pin 106 is designed to be a threaded hole, and the two are threadedly matched, in actual adjustment, by rotating the positioning pin 106, the positioning slider can also be driven to move left and right on the positioning guide rail 103. While moving, the sliding block 102 and the spur gear 101 will be driven at the same time, and finally the three jaws will be extended and retracted synchronously, thereby improving the efficiency of clamping and correction.

[0034] The flip mechanism 2 is composed of a chuck 201, a base 202, a rotary servo motor 203, a rotary gear 204, a rotary ring gear 205, a worm gear reducer 206, and a handwheel 207. The clamping housing 104 of the clamping mechanism 1 is fixed on the chuck 201. The output end of the worm gear reducer 206 is connected to the base 202 by transmission and drives the base 202 to rotate; the base 202 is connected to the chuck 201 by transmission through a gear, and the base 202 is provided with a rotary gear 204 and a rotary servo motor 203 driving the rotary gear 204 to rotate, and a rotary ring gear 205 meshing with the rotary gear 204 on the outer periphery of the chuck 201. When working, the rotating servo motor 203 provides power, and the rotating gear 204 drives the chuck 201 to rotate relative to the base 202 through the rotating ring gear 205 and the transmission of the chuck 201. At the same time, the chuck 201 can also rotate relative to the base under the action of the worm gear reducer 206 and the handwheel 207, thereby adjusting the overall flip angle of the clamping mechanism 1.

[0035] The roller bracket mechanism 3 is composed of a moving trolley 304 , a roller bracket, a height adjustment bolt 306 , a positioning nut 303 , a supporting roller 301 , an optical axis 308 , an upper positioning plate 307 and a lower positioning plate 305 .

[0036] The moving trolley 304 is moved to assist in supporting the workpiece of the long-tube bellows, and then the positioning nut 303 and the height adjustment bolt 306 are matched to lock the roller bracket mechanism 3 to improve the stability during welding. Specifically, moving wheels are provided at both ends of the moving trolley, and the moving trolley 304 is driven by the moving wheels to move along the axial direction of the workpiece. In actual production, the moving wheel can be a roller with a self-locking structure, which is used to lock the moving wheel after driving the moving trolley 304 to a suitable position, thereby locking the position of the moving trolley 304. A threaded hole is opened in the vertical direction on the moving trolley 304, and the height adjustment bolt 306 is threadedly matched with the threaded hole. The positioning nut 303 is threadedly set on the height adjustment bolt 306 extending from the upper end face of the moving trolley 304, and the roller bracket is rotatably set on the upper end face of the height adjustment bolt 306 and is axially positioned with the height adjustment bolt 306.

[0037] In the cooperation between the height adjustment bolt 306 and the positioning nut 303, the mobile trolley 304 is respectively penetrated with an optical axis 308 on both sides of the height adjustment bolt 306, and the upper positioning plate 307 is fixed to the upper end of the optical axis 308 on both sides, and the lower positioning plate 305 is fixed to the lower end. The lower end of the height adjustment bolt 306 is rotatably connected with the lower positioning plate 305 and is axially positioned by the lower positioning plate 305. The upper end of the height adjustment bolt 306 penetrates and extends out of the upper positioning plate 307 and is rotatably matched with the roller bracket. Four groups of support rollers 301 are arranged on the roller bracket. Each group of support rollers 301 includes two coaxially arranged support rollers 301, and the two support rollers 301 are respectively rotatably arranged at both ends of the roller bracket along the axial extension direction of the workpiece. A support gap for supporting the workpiece is formed between two adjacent groups of support rollers 301 along the axial extension direction of the workpiece. In this embodiment, three support gaps are formed for long-tube bellows workpieces to select a suitable position and place and support operations. In actual production, according to the need to support the workpiece, the support roller 301 can be selected to rotate slavedly, or a synchronous motor can be designed in the roller bracket to drive two adjacent groups of support rollers 301 forming the support gap to rotate synchronously with the workpiece.

[0038] The mechanical walking mechanism 5 is composed of a crawler mechanism 501, a walking connecting plate 502, a walking servo motor 503, a walking track 509, an arm 504, an upper and lower servo motor 505, an upper and lower guide rail 506, an upper and lower rack 507, and an upper and lower gear. A walking track 509 is fixed to the side of the base 401, the walking connecting plate 502 is slidably set on the walking track 509, and the arm 504 is fixed on the walking connecting plate 502. The moving end of the crawler mechanism 501 is fixed to the arm 504 and driven by the walking servo motor 503, driving the arm 504 to move forward and backward along the walking track 509. The upper and lower servo motors 505 control the up and down movement and speed of the arm 504, thereby realizing precise control of the welding process. In actual assembly, the vertical arm 504 is provided with upper and lower guide rails 506 in the height direction, and the welding connecting plate 508 is slidably set on the upper and lower guide rails 506. The vertical arm 504 is also provided with upper and lower racks 507 parallel to the upper and lower guide rails 506. The welding connecting plate 508 is rotatably provided with upper and lower gears, and the upper and lower gears are meshed with the upper and lower racks 507. The welding connecting plate 508 is provided with upper and lower servo motors 505 for driving the upper and lower gears to rotate. The upper and lower guide rails 506, the upper and lower racks 507, and the upper and lower gears form a worm gear structure. The upper and lower servo motors 505 are used in conjunction with the worm gear structure to achieve precise up and down control of the welding gun and its auxiliary structures.

[0039] The welding gun and its accessory mechanism 6 are composed of a welding feed connection plate 508, a wire wheel 601, a welding feed reducer 602, a wire feeding tube 603, a welding feed servo motor 604, a welding arm 605, and a welding gun body 606. The welding feed reducer 602 is fixed on the welding feed connection plate 508, and the welding arm 605 is arranged at the output end of the welding feed reducer 602, and the welding gun body 606 is clamped and arranged at the outer end of the welding arm 605, and the welding feed reducer 602 is provided with a wire feeding tube 603, and the wire wheel 601 is rotatably arranged on the welding feed connection plate 508, and the metal wire is wound on the wire wheel 601, and one end of the metal wire is transported to the gun mouth of the welding gun body 606 after passing through the wire feeding tube 603. The welding arm 605 is used to clamp the welding gun body 606, and the welding feed servo motor 604 controls the left and right extension of the welding arm 605. The up and down servo motor 505 is used to control the height of the welding gun body 606, and the welding speed reducer 602 controls the swing amplitude of the welding gun body 606 by adjusting the arc voltage.

[0040] Among them, Figure 2 and Figure 3As shown, the clamping mechanism 1 cooperates with the flipping mechanism 2 to weld the spherical or small-height compensator, so it is necessary to clamp and adapt the shape of the compensator, and the welding requires the workpiece to be able to rotate and adjust the flip angle on the horizontal plane. Therefore, it is necessary to clamp the workpiece on the clamping mechanism 1, and under the action of the rotating servo motor 203, the chuck 201 is rotated, and at the same time, the clamping mechanism 1 will also rotate together, thereby driving the workpiece to rotate and complete the circumferential welding of the workpiece. Manually turning the hand wheel 207 through the worm gear reducer 206, or using a servo motor to control the rotation of the worm gear reducer 206, the flip angle of the workpiece can be adjusted to meet the welding requirements. It should be noted that in this embodiment, a rotating gear 204 and a rotating ring gear 205 are installed inside the base 202, and a bearing seat is installed under the base 202 to achieve a supporting effect. The motor drives the rotating gear 204 to rotate, thereby driving the rotating ring gear 205 to rotate, and then drives the chuck 201 to rotate synchronously. During the welding process of the same cylinder or bellows compensator with different diameters, the chuck 201 can be rotated to realize the self-rotation of the workpiece, so that multiple layers can be welded at one part of the workpiece through the self-rotation of the workpiece, thereby improving its welding efficiency.

[0041] And as Figure 4 As shown, on the basis of the clamping mechanism 1 and the turning mechanism 2, the roller support mechanism 3 is used to weld the long-tube compensator. The roller support mechanism 3 serves as an auxiliary support for the long-tube workpiece.

[0042] Specifically, the support roller 301 is installed on the roller bracket, and the roller bracket is connected to the mobile trolley 304 through two light beams and a height adjustment bolt 306. A synchronous motor can be installed inside the roller bracket to give the support roller 301 a rotation speed, and the synchronous motor is synchronized with the rotation servo motor 203 of the flip mechanism 2. This synchronous motor is because during the welding process, the workpiece needs to rotate to complete the welding, so the support roller 301 needs to match the rotation speed of the flip mechanism 2 to keep consistent. In addition, the positioning nut 303 designed on the height adjustment bolt 306 can be preferably in the shape of a tripod. When the mobile trolley 304 reaches a certain position, the roller bracket mechanism 3 needs to be fixed as a whole. Then, by rotating the positioning nut 303 in the shape of a tripod, the nut can be tightened, thereby realizing the height positioning function of the height adjustment bolt 306, effectively controlling the height of the support roller 301, thereby improving the stability during the welding process, and the ultimate goal of circumferential seam welding can be achieved.

[0043] like Figure 5The mechanical walking mechanism 5 shown is mainly used to adjust the position of the welding gun. The crawler mechanism 501 is connected to the lower part of the vertical arm 504. The vertical arm 504 is slidably matched with the walking track on the base through the walking connecting plate 502. The crawler mechanism 501 drives the vertical arm 504 to move along the walking track. Above the vertical arm 504, a worm gear structure formed by the upper and lower servo motors 505, upper and lower guide rails 506, upper and lower gears, and upper and lower racks 507 is installed on the welding connecting plate 508. The upper and lower servo motors 505 and the worm gear structure cooperate to drive the overall lifting and lowering of the welding gun and its auxiliary mechanism 6, and the precise control of the speed.

[0044] like Figure 6 The welding gun and its accessory mechanism 6 shown in the figure, the welding wire is transmitted from the wire wheel 601 through the wire feeding tube 603 for the welding operation at the gun muzzle of the welding gun body 606. The welding feeding reducer 602 is installed on the welding feeding connecting plate 508, and the welding feeding servo motor 604 is installed next to the reducer. The welding feeding servo motor 604 controls the left and right extension of the welding arm 605. The welding feeding reducer 602 and the welding feeding servo motor 604 provide power for controlling the welding gun body 606, and the swing amplitude of the welding gun body 606 is accurately controlled by adjusting the arc voltage. The height of the welding gun body 606 is precisely adjusted by the upper and lower servo motors 505 of the mechanical walking mechanism 5 and the worm gear structure.

[0045] In the actual assembly process, multiple sets of welding connecting plates 508 can be designed on the same vertical arm 504, that is, welding guns with different longitudinal axis heights can be designed on the same vertical axis. At this time, the workpiece is ensured to be placed concentrically with the longitudinal axis, and the longitudinal axis heights of multiple welding guns can be adjusted, so as to meet the requirements of synchronous rotation and argon arc welding after adjusting the position of the same workpiece at different welding positions. Multiple sets of welding connecting plates 508 will not interfere with each other, and the forward and backward movement of the column can also synchronously drive the multiple sets of welding connecting plates 508 to move synchronously, which has great advantages in terms of welding efficiency and occupied space.

[0046] This embodiment can specifically complete the welding of compensators of different types and sizes, such as spherical and cylindrical shapes. Due to its special clamping mechanism 1 and roller bracket mechanism 3, the problem of replacing the clamping mechanism 1 due to different workpieces is eliminated, which greatly saves unnecessary time. The operation is relatively simple, and the degree of automation and work efficiency are also improved. The quality of the weld and the welding effect are also greatly improved, the working environment is also improved, and the probability of safety accidents is greatly reduced.

[0047] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A bellows universal compensator argon arc welding automatic welding machine, used for argon arc welding of bellows workpieces, characterized by: It includes a clamping mechanism, a turning mechanism, a roller support mechanism, a supporting mechanism, a mechanical walking mechanism, a welding gun and its auxiliary mechanisms; The supporting mechanism includes a base, the clamping mechanism includes a clamping jaw device that can adjustably clamp the workpiece, the flipping mechanism includes a chuck, the clamping jaw device is arranged on the chuck, the chuck is arranged on the base and drives the clamping jaw to flip and adjust the angle relative to the base, and the roller bracket mechanism is arranged on the base and corresponds to the direction of the clamping jaw clamping the workpiece, and is arranged in the axial extension direction of the workpiece; The mechanical walking mechanism is arranged on the side of the base along the axial extension direction of the workpiece, and includes a vertical arm and a crawler mechanism. The vertical arm is driven by the crawler mechanism to move along the axial direction of the workpiece. The welding gun and its auxiliary mechanism are arranged on the vertical arm and move up and down along the vertical arm.

2. A bellows universal compensator argon arc welding automatic welding machine as claimed in claim 1, characterized in that: The supporting mechanism comprises a first fixed flipping mechanism base and a second fixed flipping mechanism base arranged in pairs, and the flipping mechanism is rotatably arranged between the first fixed flipping mechanism base and the second fixed flipping mechanism base.

3. A bellows universal compensator argon arc welding automatic welding machine as claimed in claim 2, characterized in that: The flipping mechanism includes a base and a worm gear reducer, the output end of the worm gear reducer is connected to the base and drives the base to rotate; the base is provided with a rotating gear and a rotating servo motor driving the rotating gear to rotate, and the outer periphery of the chuck is fixed with a rotating gear ring meshing with the rotating gear.

4. A bellows universal compensator argon arc welding automatic welding machine as claimed in claim 3, characterized in that: The housing of the worm gear reducer is also provided with a hand wheel for manually driving the output end of the worm gear reducer to move.

5. The argon arc welding automatic welding machine for universal bellows compensator according to claim 1, characterized in that: The clamping mechanism includes a clamping shell, a clamping servo motor, a spur gear and at least three groups of clamping jaw devices; the clamping shell is fixed on the chuck, the spur gear is rotatably arranged on the clamping shell, and the clamping servo motor is arranged on the clamping shell and drives the spur gear to rotate; each group of clamping jaw devices includes a positioning guide rail, a positioning pin shaft, a positioning slider and a sliding block, and the clamping jaw devices are distributed on the clamping shell in a circular and equiangular manner with the center of the spur gear as a circle, the bottom of the positioning slider is slidably matched with the positioning guide rail, the positioning pin shaft is penetrated and arranged on the positioning slider and the two ends of the positioning pin shaft are rotatably matched with the clamping shell, the side surface of the positioning slider has a tooth shape that meshes with the spur gear ring, and the top of the positioning slider has a tooth shape that is tangentially arranged to the circumference of the spur gear ring, and the bottom of the sliding block has a tooth shape that meshes with the tooth shape at the top of the positioning slider, and the rotation of the spur gear ring drives the positioning slider to move along the positioning guide rail, thereby driving the sliding block to perform telescopic movement along the radial direction of the spur gear ring.

6. The argon arc welding automatic welding machine for universal bellows compensator according to claim 1, characterized in that: The roller bracket mechanism includes a moving trolley, a roller bracket, a height-adjusting bolt and a positioning nut; moving wheels are provided at both ends of the moving trolley, and the moving trolley is driven to move along the axial direction of the workpiece by the moving wheels; a threaded hole is penetrated through the moving trolley in the vertical direction, the height-adjusting bolt is threadedly matched with the threaded hole, and the positioning nut is threadedly arranged on the height-adjusting bolt extending from the upper end surface of the moving trolley; the roller bracket is rotatably arranged on the upper end surface of the height-adjusting bolt and is axially positioned with the height-adjusting bolt; at least two groups of supporting rollers are provided on the roller bracket, and a supporting gap for supporting the workpiece is formed between two adjacent groups of supporting rollers along the axial extension direction of the workpiece.

7. A bellows universal compensator argon arc welding automatic welding machine as claimed in claim 6, characterized in that: Each group of supporting rollers includes two coaxially arranged supporting rollers, and the two supporting rollers are rotatably arranged at two ends of the roller bracket along the axial extension direction of the workpiece.

8. The argon arc welding automatic welding machine for universal bellows compensator according to claim 6, characterized in that: The movable trolley has optical axes passing through both sides of the height adjustment bolts respectively, upper positioning plates are fixed at the upper ends of the optical axes on both sides, and lower positioning plates are fixed at the lower ends. The lower ends of the height adjustment bolts are rotatably connected to the lower positioning plates and are axially positioned by the lower positioning plates, while the upper ends of the height adjustment bolts pass through and extend out of the upper positioning plates and are rotatably coordinated with the roller brackets.

9. The argon arc welding automatic welding machine for universal bellows compensator according to claim 1, characterized in that: The mechanical walking mechanism comprises a walking connection plate, a walking track is fixed on the side of the base, the walking connection plate is slidably arranged on the walking track, the vertical arm is fixed on the walking connection plate, and the moving end of the crawler mechanism is fixed to the vertical arm.

10. The argon arc welding automatic welding machine for universal bellows compensator according to claim 1, characterized in that: The welding gun and its auxiliary mechanism include a welding feed connecting plate, a welding arm, a welding gun body, a welding feed reducer and a wire wheel; The vertical arm is provided with upper and lower guide rails in the height direction, and the welding delivery connecting plate is slidably arranged on the upper and lower guide rails. The vertical arm is also provided with upper and lower racks parallel to the upper and lower guide rails. The welding delivery connecting plate is rotatably provided with upper and lower gears, and the upper and lower gears are meshed with the upper and lower racks. The welding delivery connecting plate is provided with upper and lower servo motors for driving the upper and lower gears to rotate. The welding feed reducer is fixed on the welding feed connecting plate, and the welding arm is arranged at the output end of the welding feed reducer, and the welding gun body is clamped and arranged at the outer end of the welding arm. The welding feed reducer is provided with a wire feeding tube, and the wire wheel is rotatably arranged on the welding feed connecting plate. The metal wire is wound on the wire wheel, and one end of the metal wire is transported to the muzzle of the welding gun body after passing through the wire feeding tube.

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