Rotary type cabin body welding assembly tool and welding process method

Abstract

The application provides a rotary cabin welding assembly tool and a welding process method. The assembly tool comprises a horizontal rotary displacement system, a ring-shaped support frame and a head-tail connecting cover plate. The tool and the welding process method can simply and quickly realize positioning and assembly during rotary cabin welding, form multiple ring welds on the outer surface of the rotary cabin, and reliably connect the rotary cabin parts through the welds. The cabin does not need to be previously marked or measured and positioned by a laser tracker, the process of repeatedly positioning and assembling the rotary cabin by hand is reduced, the high-precision assembly of the thin-walled flexible tank section is efficiently realized through high-precision positioning at both ends and the intermediate ring-shaped support, the deformation of the rotary cabin during welding is effectively controlled, the assembly efficiency of the rotary cabin is improved, the assembly precision of the rotary cabin is significantly improved, stable production of the high-precision rotary cabin can be realized, the butt joint assembly and manual debugging time of the cabin is significantly shortened, and the batch stable production of the cabin is facilitated.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically, to a welding assembly fixture and welding process for a rotating cabin. Background Technology

[0002] Welding, as a crucial joining technology for metallic materials, is gradually evolving towards automation and intelligence. Rotating hulls are essential structural components of aerospace weapon systems, primarily responsible for missile load-bearing, fuel storage, and the installation of structural components. Rotating hulls mainly consist of tank sections, forward sections, and aft sections, which are connected by welding or bolting. Traditional manufacturing processes typically employ manual assembly and spot welding to achieve simple connections between these sections, followed by full-seam welding using manual methods. This approach suffers from low production efficiency, low assembly accuracy, and significant welding deformation. With the increasing size of missile bodies, manual operation becomes difficult, and assembly errors and welding deformation lead to dimensional variations in the hull that no longer meet design requirements. The extensive manual operations in the production process are no longer sufficient to meet the demands for high-volume, high-precision, and high-efficiency production of rotating hulls.

[0003] Chinese patent CN110986697A discloses a multi-functional rocket segment docking vehicle. It includes a docking drive wheel system, a transfer drive wheel system, a frame, a six-dimensional attitude adjustment bracket, and an automatic charging mechanism. The docking drive wheel system is located below the frame for driving movement during docking; the transfer drive wheel system is located below the frame for driving movement during transfer; the six-dimensional attitude adjustment bracket is located above the frame for adjusting the position and attitude of the rocket segment; and the automatic charging mechanism is located below the frame for ensuring a tight connection between the rocket segment docking vehicle and ground charging equipment, enabling current conduction.

[0004] However, the aforementioned docking vehicle is mainly designed for compartment transfer and docking scenarios. It achieves overall position and attitude adjustment through a vehicle body walking system and a six-dimensional attitude adjustment bracket, resulting in a relatively complex equipment configuration. For the assembly and welding of rotating compartments, especially in scenarios where it is necessary to maintain stable positioning at both ends of the compartment during welding, provide adjustable radial support for the middle section of the compartment, and enable the compartment to rotate smoothly around its own axis, the above-mentioned technical solutions are difficult to simultaneously meet the assembly alignment, radial support, rotation welding, and position locking requirements of long rotating compartments. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a welding assembly fixture and welding process method for rotating cabins.

[0006] According to the present invention, a welding assembly fixture for a rotating cabin includes: a horizontal rotational displacement system, an annular support frame, and bow and stern connecting covers. The horizontal rotary positioning system includes a base guide rail, a tailstock horizontal moving device, and a headstock servo drive device. The base guide rail includes a base, a linear guide rail, and an adjustment mechanism. The linear guide rail is installed above the base, and the adjustment mechanism is used to adjust the installation position of the base. The tailstock horizontal moving device is slidably mounted on the linear guide rail. The tailstock horizontal moving device includes a lower housing, an upper housing, a tailstock three-jaw chuck, and a tailstock sliding locking mechanism. The tailstock three-jaw chuck is installed on the side of the upper housing facing the headstock servo drive device. The tailstock sliding locking mechanism is used to lock the tailstock horizontal moving device on the linear guide rail. The headstock servo drive device is located at one end of the base guide rail. The headstock servo drive device includes a fixed housing, a headstock three-jaw chuck, a servo motor, and a reducer. The headstock three-jaw chuck is installed on the side of the fixed housing facing the tailstock horizontal moving device. The servo motor is connected to the headstock three-jaw chuck through the reducer. The headstock three-jaw chuck and the tailstock three-jaw chuck are arranged opposite to each other and coaxially. The headstock three-jaw chuck and the tailstock three-jaw chuck are respectively used to support and clamp the head and tail connecting cover plates installed at both ends of the rotating cabin. The annular support frame is slidably mounted on the linear guide rail and located between the headstock servo drive device and the tailstock horizontal moving device. The annular support frame includes a lower bracket, an upper bracket, a screw mechanism, and an annular support frame sliding locking mechanism. The screw mechanism is radially extended and retracted along the lower bracket and the upper bracket to support and correct the storage tank section of the rotating cabin. The annular support frame sliding locking mechanism is used to lock the annular support frame on the linear guide rail.

[0007] Preferably, the end-to-end connecting cover is a square cover, and the middle of the end-to-end connecting cover is provided with a clamping hole for clamping by the head seat three-jaw chuck or the tail seat three-jaw chuck. The end-to-end connecting cover is provided with positioning pin holes in the second quadrant and the fourth quadrant, respectively. The positioning pin holes are used for positioning and connecting with the front or rear section of the rotating cabin.

[0008] Preferably, the parallelism between the line connecting the centers of the positioning pin holes in the second and fourth quadrants of the end-to-end connecting cover plate and the straight edge of the square cover plate is no greater than 0.01 mm.

[0009] Preferably, the adjustment mechanism includes multiple sets of adjusting shims and pressure plates. The adjusting shims are disposed below the base and are used to adjust the height and horizontal position of the base. The pressure plates are used to press and fix the base to the working platform.

[0010] Preferably, the tailstock horizontal moving device is slidably mounted on the linear guide rail via a first slider; the tailstock sliding locking mechanism includes an L-shaped screw with a handle and a top block, the side of the first slider is provided with a threaded hole and a guide groove, the L-shaped screw with a handle is threaded into the threaded hole; the top block is movably mounted in the guide groove and is located between the inner end of the L-shaped screw with a handle and the linear guide rail, the axis of the L-shaped screw with a handle is perpendicular to the extension direction of the linear guide rail; when the L-shaped screw with a handle is rotated, the L-shaped screw with a handle pushes the top block against the side of the linear guide rail, so that the top block is pressed tightly against the linear guide rail; The annular support frame is slidably mounted on the linear guide rail via a second slider. The annular support frame sliding locking mechanism includes an L-shaped screw with a handle and a top block. The side of the second slider is provided with a threaded hole and a guide groove. The L-shaped screw with a handle is threaded into the threaded hole. The top block is movably mounted in the guide groove and is located between the inner end of the L-shaped screw with a handle and the linear guide rail. The axis of the L-shaped screw with a handle is perpendicular to the extension direction of the linear guide rail. When the L-shaped screw with a handle is rotated, it pushes the top block against the side of the linear guide rail, causing the top block to press firmly against the linear guide rail.

[0011] Preferably, the screw mechanism includes a nut, a screw, and a roller; The nut is threadedly engaged with the screw, and the roller is located at the inner end of the screw, facing the center of the annular support frame, for rolling contact with the outer circumferential surface of the storage tank section of the rotating hull.

[0012] Preferably, the positive jaw clamping range of the headstock three-jaw chuck and the tailstock three-jaw chuck is φ25mm to φ280mm, the clamping range is φ150mm to φ500mm, and the radial runout is no greater than 0.056mm; The coaxiality between the clamping center of the headstock three-jaw chuck and the clamping center of the tailstock three-jaw chuck is no greater than 0.2 mm.

[0013] According to the present invention, a welding process method for a rotating hull is provided, employing the welding assembly fixture for the rotating hull described in any one of the above-mentioned methods, comprising: Pre-welding cleaning is carried out on the parts of the fore compartment, aft compartment, and tank section to be welded. The forward and aft compartments are respectively positioned and connected to the corresponding bow and stern connecting covers; Clamp the bow and stern connecting cover plates on the front section into the head seat three-jaw chuck, and clamp the bow and stern connecting cover plates on the rear section into the stern seat three-jaw chuck. Rotate the headstock three-jaw chuck and the tailstock three-jaw chuck to adjust the end face flatness and outer circle runout of the front compartment, the rear compartment and the corresponding head and tail connecting cover plates; The tank section is placed inside the annular support frame, and the screw mechanism of the annular support frame is adjusted so that the two ends of the tank section are aligned with the end faces of the front compartment section and the rear compartment section, respectively. The tailstock horizontal moving device is driven to move along the linear guide rail toward the headstock servo drive device, so that the front compartment, the tank section and the rear compartment are closed, and the tailstock horizontal moving device is locked by the tailstock sliding locking mechanism. The screw mechanism of the annular support frame is readjusted to adjust the radial support and outer circle runout of the tank section; Rotate the head three-jaw chuck and the tail three-jaw chuck to check the flatness of the head and tail connecting cover plates clamped in the head three-jaw chuck and the tail three-jaw chuck respectively; Spot welding is performed at the docking points of the compartments; After spot welding, the rotating cabin is continuously rotated by the headstock servo drive device, and the docking positions of the cabin sections are continuously welded.

[0014] Preferably, the spot welding and the continuous welding are respectively performed using laser autofusion welding; During spot welding, the first weld point is formed when the rotating cabin is stationary, and then the rotating cabin is driven to rotate to form multiple weld points that are spaced apart along the circumference. During continuous welding, the laser heat source continuously acts on the docking position of the sections on the outer surface of the rotating cabin, and forms a ring weld during the rotation of the rotating cabin.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention, by separately setting up a horizontal rotational positioning system, a ring support frame, and end connecting covers, enables simple and rapid positioning and assembly during the welding of rotating hulls. Multiple circumferential welds are formed on the outer surface of the rotating hull, allowing for reliable connection of the hull parts. It eliminates the need for prior hull marking or laser tracking for positioning, reducing the manual repetitive assembly and positioning process. High-precision positioning at both ends and the central ring support enable efficient and high-precision assembly of thin-walled flexible tank sections, effectively controlling deformation of the rotating hull during welding. Weld quality meets Class I requirements, with post-weld contour control within ±1.0mm and quadrant torsion less than ±0.20mm. This improves assembly efficiency and significantly enhances assembly accuracy, enabling stable production of high-precision rotating hulls and significantly shortening the time for hull docking, assembly, and manual debugging, thus facilitating stable mass production of hulls. Attached Figure Description

[0016] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram illustrating the structure of the welding and assembly fixture for the rotating cabin, which is the main feature of this invention. Figure 2 This is a schematic diagram illustrating the structure of the horizontal rotary displacement system, which is the main feature of this invention. Figure 3 This is a schematic diagram illustrating the structure of the base guide rail, which is the main feature of this invention. Figure 4 This is a schematic diagram illustrating the structure of the tailstock horizontal moving device of the present invention. Figure 5 This is a schematic diagram illustrating the structure of the headstock servo drive device, which is the main feature of this invention. Figure 6 This is a schematic diagram illustrating the structure of the ring-shaped support frame, which is the main feature of this invention. Figure 7 This is a schematic diagram illustrating the structure of the end-to-end connecting cover plate, which is the main feature of this invention.

[0017] The figure shows: 1. Horizontal rotary positioning system; 2. Ring support frame; 3. Head and tail connecting cover plate; 11. Base guide rail; 12. Tailstock horizontal moving device; 13. Headstock servo drive device; 111. Base; 112. Linear guide rail; 113. Adjustment mechanism; 121. Lower housing; 122. Upper housing; 123. Tailstock three-jaw chuck; 124. Tailstock sliding locking mechanism; 131. Fixed housing; 132. Headstock three-jaw chuck; 133. Servo motor; 134. Reducer; 21. Lower bracket; 22. Upper bracket; 23. Screw mechanism; 24. Ring support frame sliding locking mechanism. Detailed Implementation

[0018] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0019] like Figure 1 As shown, a rotary cabin welding assembly fixture provided by the present invention includes: a horizontal rotational positioning system 1, an annular support frame 2, and end connecting cover plates 3.

[0020] After the rotating hull welding assembly tooling is completed, the weld seams are welded using an externally common laser autofusion welding mechanism.

[0021] The horizontal rotary positioning system 1 includes a base guide rail 11, a tailstock horizontal moving device 12, and a headstock servo drive device 13.

[0022] The base guide rail 11 includes a base 111, a linear guide rail 112, and an adjustment mechanism 113. The linear guide rail 112 is installed on top of the base 111 by bolt connection, and the adjustment mechanism 113 is used to adjust the installation position of the base 111.

[0023] The tailstock horizontal moving device 12 is slidably mounted on the linear guide rail 112. The tailstock horizontal moving device 12 includes a lower housing 121, an upper housing 122, a tailstock three-jaw chuck 123, and a tailstock sliding locking mechanism 124. The tailstock three-jaw chuck 123 is mounted on the side of the upper housing 122 facing the headstock servo drive device 13, and has clamping and driven rotation functions. The tailstock sliding locking mechanism 124 is used to lock the tailstock horizontal moving device 12 onto the linear guide rail 112.

[0024] The headstock servo drive device 13 is located at one end of the base guide rail 11. The headstock servo drive device 13 includes a fixed housing 131, a headstock three-jaw chuck 132, a servo motor 133, and a reducer 134. The headstock three-jaw chuck 132 is installed on the side of the fixed housing 131 facing the tailstock horizontal moving device 12. The servo motor 133 is connected to the headstock three-jaw chuck 132 through the reducer 134. The headstock three-jaw chuck 132 has the functions of clamping and active rotation.

[0025] The head three-jaw chuck 132 and the tail three-jaw chuck 123 are arranged opposite to each other and coaxially. The head three-jaw chuck 132 and the tail three-jaw chuck 123 are used to support and clamp the bow and stern connecting cover plates 3 installed at both ends of the rotating cabin. Specifically, the bow and stern connecting cover plates 3 are made of aluminum alloy.

[0026] The annular support frame 2 is slidably mounted on the linear guide rail 112 and located between the headstock servo drive device 13 and the tailstock horizontal moving device 12. The annular support frame 2 includes a lower bracket 21, an upper bracket 22, a screw mechanism 23, and an annular support frame sliding locking mechanism 24. The screw mechanism 23 is radially telescopically arranged along the lower bracket 21 and the upper bracket 22 to support and shape the tank section of the rotating cabin. The annular support frame sliding locking mechanism 24 is used to lock the annular support frame 2 onto the linear guide rail 112. The screw mechanism 23 includes a nut, a screw, and a roller; the nut is threadedly engaged with the screw, and the roller is located at the inner end of the screw, facing the center of the annular support frame 2, for rolling contact with the outer circumferential surface of the tank section of the rotating cabin.

[0027] By separately setting up a horizontal rotary positioning system 1, an annular support frame 2, and end connecting cover plates 3, positioning and assembly during the welding of rotating hulls can be achieved simply and quickly. Multiple circumferential welds are formed on the outer surface of the rotating hull, and the rotating hull parts are reliably connected through these welds. Pre-positioning using hull markings or laser trackers is unnecessary, reducing the need for repeated manual assembly and positioning of the rotating hull. High-precision positioning at both ends and the annular support in the middle enable efficient and high-precision assembly of the thin-walled flexible tank section, effectively controlling deformation of the rotating hull during welding. The weld quality meets Class I requirements, with post-weld contour control within ±1.0mm and quadrant torsion less than ±0.20mm. This improves the assembly efficiency and significantly enhances the assembly accuracy of rotating hulls, enabling stable production of high-precision rotating hulls and significantly shortening the time for hull docking, assembly, and manual debugging, thus contributing to stable mass production of hulls.

[0028] In one feasible implementation, the end-to-end connecting cover 3 is a square cover plate. The middle of the end-to-end connecting cover 3 is provided with a clamping hole for the head seat three-jaw chuck 132 or the tail seat three-jaw chuck 123 to pass through and clamp the front and rear sections. The end-to-end connecting cover 3 is provided with positioning pin holes in the second and fourth quadrants, respectively. The positioning pin holes are used for positioning and connecting with the front or rear sections of the rotating cabin.

[0029] Specifically, the parallelism between the center line of the positioning pin holes set in the second and fourth quadrants of the end-to-end connecting cover plate 3 and the straight edge of the square cover plate is no greater than 0.01mm.

[0030] The adjustment mechanism 113 includes multiple sets of adjusting shims and pressure plates. The adjusting shims are located below the base 111 and are used to adjust the height and horizontal position of the base 111. The pressure plates are used to press and fix the base 111 to the working platform.

[0031] In one feasible embodiment, the tailstock horizontal moving device 12 is slidably mounted on the linear guide rail 112 via a first slider. A tailstock sliding locking mechanism 124 is mounted on the side of the first slider, and is used to lock the tailstock horizontal moving device 12 to any point on the linear guide rail 112. The tailstock sliding locking mechanism 124 includes an L-shaped screw with a handle and a top block; the side of the first slider is provided with a threaded hole and a guide groove, and the L-shaped screw with a handle is threaded into the threaded hole; the top block is movably disposed in the guide groove and located between the inner end of the L-shaped screw with a handle and the linear guide rail, with the axis of the L-shaped screw with a handle perpendicular to the extension direction of the linear guide rail. When the L-shaped screw with a handle is rotated, it pushes the top block against the side of the linear guide rail, pressing the top block firmly onto the linear guide rail 112. When the L-shaped screw with a handle is rotated in the opposite direction, the top block disengages from the linear guide rail, and the slider can then move along the linear guide rail 112.

[0032] The annular support frame 2 is slidably mounted on the linear guide rail 112 via a second slider. A sliding locking mechanism 24 for the annular support frame is installed on the side of the second slider, and is used to lock the annular support frame 2 to any point on the linear guide rail 112. The sliding locking mechanism 24 includes an L-shaped screw with a handle and a top block. The side of the second slider has a threaded hole and a guide groove, and the L-shaped screw with a handle is threaded into the threaded hole. The top block is movably mounted in the guide groove and is located between the inner end of the L-shaped screw with a handle and the linear guide rail. The axis of the L-shaped screw with a handle is perpendicular to the extension direction of the linear guide rail. When the L-shaped screw with a handle is rotated, it pushes the top block against the side of the linear guide rail, pressing the top block firmly onto the linear guide rail 112. When the L-shaped screw with a handle is rotated in the opposite direction, the top block disengages from the linear guide rail, and the slider can then move along the linear guide rail 112.

[0033] In one feasible implementation, the positive jaw clamping range of the headstock three-jaw chuck 132 and the tailstock three-jaw chuck 123 is φ25mm to φ280mm, the clamping range is φ150mm to φ500mm, and the radial runout is no greater than 0.056mm.

[0034] The coaxiality between the clamping center of the headstock three-jaw chuck 132 and the clamping center of the tailstock three-jaw chuck 123 is no more than 0.2mm.

[0035] A welding process for a rotating hull, employing any of the aforementioned rotating hull welding assembly fixtures, includes: Pre-welding cleaning is carried out on the parts of the fore compartment, aft compartment, and tank section to be welded.

[0036] The forward and aft compartments are respectively positioned and connected to the corresponding bow and stern connecting covers 3.

[0037] Clamp the bow and stern connecting cover 3 on the forward section to the head seat three-jaw chuck 132, and clamp the bow and stern connecting cover 3 on the aft section to the stern seat three-jaw chuck 123.

[0038] Rotate the headstock three-jaw chuck 132 and the tailstock three-jaw chuck 123 to adjust the end face flatness and outer circle runout of the front compartment, the rear compartment and the corresponding head and tail connecting cover 3.

[0039] Place the tank section inside the annular support frame 2, and adjust the screw mechanism 23 of the annular support frame 2 so that the two ends of the tank section are aligned with the end faces of the front and rear compartments, respectively.

[0040] The tailstock horizontal moving device 12 is driven to move along the linear guide rail 112 toward the headstock servo drive device 13, so that the front compartment, storage tank section and rear compartment are closed, and the tailstock horizontal moving device 12 is locked by the tailstock sliding locking mechanism 124.

[0041] The screw mechanism 23 of the annular support frame 2 is adjusted again to provide radial support and adjust the outer circle runout of the storage tank section.

[0042] Rotate the headstock three-jaw chuck 132 and the tailstock three-jaw chuck 123 to check the flatness of the head and tail connecting cover plates 3 clamped in the headstock three-jaw chuck 132 and the tailstock three-jaw chuck 123 respectively.

[0043] Spot welding is performed at the docking points of the compartments.

[0044] After spot welding, the rotating cabin is continuously rotated by the headstock servo drive device 13, and the docking positions of the cabin sections are continuously welded.

[0045] In one feasible implementation, spot welding and continuous welding are respectively laser autofusion welding; during spot welding, the first weld point is formed in the stationary state of the rotating cabin, and then the rotating cabin is driven to rotate and form multiple weld points distributed circumferentially; during continuous welding, the laser heat source continuously acts on the segment docking position on the outer surface of the rotating cabin and forms an annular weld during the rotation of the rotating cabin.

[0046] In one feasible implementation, a lever dial indicator is used to measure the flatness of the aft and stern connecting cover plate 3; the head seat servo drive device 13 is assembled and clamped with the aft and stern connecting cover plate 3 and the front compartment section and rotated for measurement by servo motor drive; the stern seat horizontal moving device 12 is assembled and clamped with the aft and stern connecting cover plate 3 and the rear compartment section and rotated for measurement by manual rotation; the circular diameter of the flatness measured by the aft and stern connecting cover plate 3 is larger than the outer diameter of the compartment.

[0047] In one feasible implementation, a specific welding assembly fixture for rotating cabins is provided for assembling rotating cabins with a diameter ranging from φ700mm to φ1100mm and a length ranging from 500mm to 4500mm.

[0048] The welding and assembly fixtures for rotating hulls include a horizontal rotational positioning system 1, an annular support frame 2, and bow and stern connecting cover plates 3.

[0049] The horizontal rotary positioning system 1 includes a base guide rail 11, a tailstock horizontal moving device 12, and a headstock servo drive device 13.

[0050] The base guide rail 11 includes a base 111, a linear guide rail 112, and an adjustment mechanism 113. The base 111 is made of cast iron and has a length of 7300mm. The linear guide rail 112 is made of tool steel and is connected to the base 111 by bolts with a bolt spacing of 80mm to 100mm. Adjusting shims are used to adjust the parallelism of the upper surface of the base 111 to no more than 0.05mm and the straightness to no more than 0.05mm. This enables high-precision sliding of the tailstock horizontal moving device 12 and the annular support frame 2.

[0051] The tailstock horizontal moving device 12 is slidably mounted on the linear guide rail 112, and its sliding range is from 0 mm to 7000 mm. The tailstock horizontal moving device 12 includes a lower housing 121, an upper housing 122, a tailstock three-jaw chuck 123, and a tailstock sliding locking mechanism 124. The upper housing 122 is mounted on the lower housing 121, and the tailstock three-jaw chuck 123 is mounted on the side of the upper housing 122 facing the headstock servo drive device 13. The tailstock three-jaw chuck 123 has clamping and driven rotation functions, and is a high-precision chuck with a radial runout of no more than 0.004 mm. The tailstock sliding locking mechanism 124 is used to lock the tailstock horizontal moving device 12 onto the linear guide rail 112.

[0052] The headstock servo drive device 13 is bolted to one end of the base guide rail 11 and cannot be moved. The bolt spacing is 100mm to 150mm. The headstock servo drive device 13 includes a fixed housing 131, a headstock three-jaw chuck 132, a servo motor 133, and a reducer 134. The headstock three-jaw chuck 132 is fixedly installed on the side of the fixed housing 131 facing the tailstock horizontal moving device 12 and cannot be moved. The servo motor 133 is connected to the headstock three-jaw chuck 132 through the reducer 134. The headstock servo drive device 13 is connected to the gantry CNC system to achieve precise control of speed and angle. The steplessly adjustable headstock three-jaw chuck 132 rotates at a set speed from 0° / min to 200° / min with a speed fluctuation of no more than 1%.

[0053] The headstock three-jaw chuck 132 and the tailstock three-jaw chuck 123 are arranged opposite each other and coaxially. The coaxiality between the clamping centers of the headstock three-jaw chuck 132 and the tailstock three-jaw chuck 123 is no greater than 0.2 mm. The end-to-end connecting cover plate 3 has an inner hole. The headstock three-jaw chuck 132 and the tailstock three-jaw chuck 123 are used to clamp and support the end-to-end connecting cover plates 3 installed at both ends of the rotating hull. Pin holes are provided in the second and fourth quadrants of the end-to-end connecting cover plate 3 for positioning and assembly with the forward and aft sections. The end-to-end connecting cover plate 3 is square with rounded corners. The parallelism between the pin holes in the second and fourth quadrants and the straight edges of the square cover plate is no greater than 0.01 mm. The end-to-end connecting cover plate 3 is made of aluminum alloy and uses a high-precision chuck with a radial runout of no more than 0.004 mm. The outer dimensions of the inner hole of the end connecting cover plate 3 range from φ600mm to φ1300mm, which is used to adapt to rotating cabins of different diameters.

[0054] Four sets of annular support frames 2 are slidably mounted on linear guide rails 112, with a sliding range of 0mm to 7000mm along the linear guide rails 112. They are located between the headstock servo drive device 13 and the tailstock horizontal moving device 12. Each annular support frame 2 includes a lower bracket 21, an upper bracket 22, a screw mechanism 23, and an annular support frame sliding locking mechanism 24. The lower bracket 21 and upper bracket 22 are made of cast iron or carbon steel, while the rollers in the screw mechanism 23 are made of hard plastic to prevent scratches or impacts on the surfaces of rotating cabin parts. The lower bracket 21 and upper bracket 22 are connected and fixed together by pins and bolts. Four sets of screw mechanisms 23 are circumferentially distributed and installed on the lower bracket 21 and upper bracket 22, and are radially telescopically arranged along the lower bracket 21 and upper bracket 22. They are used to support and correct the tank section of the rotating hull. The annular support frame sliding locking mechanism 24 is used to lock the annular support frame 2 onto the linear guide rail 112. The screw mechanism 23 includes a nut, a screw, and a roller; the screw adopts a fine thread and has a high-precision radial telescopic function. The nut is threaded with the screw, and the roller is located at the inner end of the screw, facing the center of the annular support frame 2. The roller is used to roll in contact with the outer circumferential surface of the tank section of the rotating hull, for supporting and correcting the flexible tank section parts, avoiding deflection deformation of the rotating hull, and controlling the runout of the outer circle of the tank section with a diameter of φ700mm to φ1100mm to no more than 0.5mm.

[0055] The welding process method for rotating cabins using this rotating cabin welding assembly fixture includes: Before welding, the fore compartment, aft compartment, and tank section to be welded are ground and cleaned. 80# diamond sandpaper is used to grind away the oxide scale at the welding location, and then alcohol is used to wipe it to expose the metallic luster.

[0056] There are two pin holes in the second and fourth quadrants of the end faces of the front and rear compartments. The pin hole positions are consistent with the pin hole positions on the aft and stern connecting cover plates 3. The pin holes of the front and rear compartments are respectively positioned and connected to the pin holes in the second and fourth quadrants of the corresponding aft and stern connecting cover plates 3 to ensure that the assembly gap is no more than 0.05mm. The front and rear compartments are fixed to the aft and stern connecting cover plates 3 with pins.

[0057] Clamp the bow and stern connecting cover 3 on the forward section to the head seat three-jaw chuck 132, and clamp the bow and stern connecting cover 3 on the aft section to the stern seat three-jaw chuck 123.

[0058] Servo motor 133 drives the headstock three-jaw chuck 132 to rotate, while the tailstock three-jaw chuck 123 is manually rotated. The circular diameter of the flatness measured by the end plates 3 is greater than the outer diameter of the cabin. A dial indicator is used to measure the flatness of the end faces of the end plates 3 corresponding to the front and rear cabin sections. The headstock three-jaw chuck 132 and tailstock three-jaw chuck 123 are continuously rotated and adjusted until the flatness of the end faces of the end plates 3 corresponding to the front and rear cabin sections measured by the dial indicator is no greater than 0.2mm. The outer diameter runout of the front and rear cabin sections is also measured using a dial indicator. The headstock three-jaw chuck 132 and tailstock three-jaw chuck 123 are continuously rotated and adjusted. A set of annular support frames 2 is used to support the cabin, and the cabin is corrected by adjusting the screw mechanism 23 until the outer diameter runout of the front and rear cabin sections is no greater than 0.5mm as measured by the dial indicator.

[0059] The tank section is placed inside the annular support frame 2, and the screw mechanism 23 of the annular support frame 2 is adjusted so that both ends of the tank section are aligned with the end faces of the forward and aft compartments, respectively, and are basically consistent in all directions. A stop is machined at the joint between the forward and aft compartments, and the forward and aft compartments are joined using a stop joint.

[0060] The tailstock horizontal moving device 12 moves along the linear guide rail 112 toward the headstock servo drive device 13. The tank section skin will mate with the front and rear compartment sections, so that the front compartment section, tank section and rear compartment section are closed. After closing, the assembly gap is measured to ensure that it is no more than 0.2mm, and the tailstock horizontal moving device 12 is locked by the tailstock sliding locking mechanism 124.

[0061] Adjust the screw mechanism 23 of the annular support frame 2 again to adjust the radial support and outer circle runout of the tank section. Use a lever dial indicator to measure the outer circle runout of the tank section. Continue to adjust the screw mechanism 23 of the annular support frame 2 until the lever dial indicator shows that the outer circle runout of the tank section is no more than 0.5mm.

[0062] Rotate the headstock three-jaw chuck 132 and use a dial indicator to measure the flatness of the end connecting cover plates 3 clamped in the headstock three-jaw chuck 132, with a measurement distance of not less than 500mm. Continue rotating the headstock three-jaw chuck 132 until the flatness of the end connecting cover plates 3 clamped in the headstock three-jaw chuck 132, as measured by the dial indicator, is no greater than 0.05mm. Fix the headstock three-jaw chuck 132 so that it does not rotate.

[0063] Rotate the tailstock three-jaw chuck 123 and use a lever dial indicator to measure the flatness of the end-to-end connecting cover plate 3 clamped in the tailstock three-jaw chuck 123. The measurement distance should not be less than 500mm. Continue to rotate the tailstock three-jaw chuck 123 until the flatness of the end-to-end connecting cover plate 3 clamped in the tailstock three-jaw chuck 123, as measured by the lever dial indicator, is not greater than 0.05mm.

[0064] Ensure that the head and tail connecting cover plates 3 clamped in the head three-jaw chuck 132 and the head and tail connecting cover plates 3 clamped in the tail three-jaw chuck 123 are on the same horizontal plane.

[0065] Laser autofusion welding was used to spot weld the docking positions of the compartments. The welding parameters for spot welding were: laser output power of 300W to 500W, welding gas flow rate of 10L / min to 25L / min, welding gas as argon, and laser defocusing amount of -5mm to +5mm.

[0066] Specifically, the servo motor 133 is not started initially, but the laser is activated. The first weld point is completed when the cabin is stationary, used to fix the angular dimensions. After spot welding the docking positions between the cabin sections, it can be ensured that the headstock servo drive device 13 drives the cabin sections and the rear cabin sections to rotate synchronously. The servo motor 133 is then activated, and the laser is activated. The laser heat source makes discontinuous vertical contact with the outer surface of the rotating cabin, forming spaced weld points. The weld point length is 10mm to 20mm, and the weld point interval is 100mm to 200mm.

[0067] After spot welding, the rotating cabin is continuously rotated by the headstock servo drive device 13, and the docking positions of the cabin sections are continuously welded using laser autofusion welding. The parameters for continuous welding are: laser output power of 2kW to 6kW, welding speed of 2m / min, welding gas flow rate of 40L / min to 50L / min, welding gas as argon, and laser defocusing amount of 0mm to +10mm.

[0068] Specifically, the servo motor 133 is started, the laser is started, and the laser heat source continuously and vertically contacts the outer surface of the rotating cabin, continuously emitting light to form a connecting weld.

[0069] After the rotary cabin is welded and cooled, stop the servo motor 133 from rotating, and release the adjusting screw mechanism 23 of the head three-jaw chuck 132, the tail three-jaw chuck 123 and the annular support frame 2; remove the upper bracket 22, remove the head and tail connecting cover plates 3, and remove the welded rotary cabin from the tooling.

[0070] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0071] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A rotating cabin welding assembly fixture, characterized in that, include: Horizontal rotary displacement system (1), ring support frame (2) and end connecting cover plate (3); The horizontal rotary positioning system (1) includes a base guide rail (11), a tailstock horizontal moving device (12), and a headstock servo drive device (13). The base guide rail (11) includes a base (111), a linear guide rail (112), and an adjustment mechanism (113). The linear guide rail (112) is installed above the base (111), and the adjustment mechanism (113) is used to adjust the installation position of the base (111). The tailstock horizontal moving device (12) is slidably mounted on the linear guide rail (112). The tailstock horizontal moving device (12) includes a lower housing (121), an upper housing (122), a tailstock three-jaw chuck (123), and a tailstock sliding locking mechanism (124). The tailstock three-jaw chuck (123) is mounted on the side of the upper housing (122) facing the headstock servo drive device (13). The tailstock sliding locking mechanism (124) is used to lock the tailstock horizontal moving device (12) on the linear guide rail (112). The headstock servo drive device (13) is located at one end of the base guide rail (11). The headstock servo drive device (13) includes a fixed housing (131), a headstock three-jaw chuck (132), a servo motor (133), and a reducer (134). The headstock three-jaw chuck (132) is installed on the side of the fixed housing (131) facing the tailstock horizontal moving device (12). The servo motor (133) is connected to the headstock three-jaw chuck (132) through the reducer (134). The head three-jaw chuck (132) and the tail three-jaw chuck (123) are arranged opposite to each other and coaxially. The head three-jaw chuck (132) and the tail three-jaw chuck (123) are respectively used to support and clamp the head and tail connecting cover plates (3) installed at both ends of the rotating cabin. The annular support frame (2) is slidably mounted on the linear guide rail (112) and located between the headstock servo drive device (13) and the tailstock horizontal moving device (12). The annular support frame (2) includes a lower bracket (21), an upper bracket (22), a screw mechanism (23), and an annular support frame sliding locking mechanism (24). The screw mechanism (23) is radially extended and retracted along the lower bracket (21) and the upper bracket (22) to support and correct the storage tank section of the rotating cabin. The annular support frame sliding locking mechanism (24) is used to lock the annular support frame (2) on the linear guide rail (112).

2. The rotary cabin welding assembly fixture as described in claim 1, characterized in that, The end-to-end connecting cover (3) is a square cover. The middle part of the end-to-end connecting cover (3) is provided with a clamping hole for clamping by the head seat three-jaw chuck (132) or the tail seat three-jaw chuck (123). The end-to-end connecting cover (3) is provided with positioning pin holes in the second quadrant and the fourth quadrant respectively. The positioning pin holes are used for positioning and connecting with the front or rear section of the rotating cabin.

3. The rotary cabin welding assembly fixture as described in claim 2, characterized in that, The parallelism between the line connecting the centers of the positioning pin holes in the second and fourth quadrants of the end-to-end connecting cover plate (3) and the straight edge of the square cover plate is no greater than 0.01 mm.

4. The rotary cabin welding assembly fixture as described in claim 1, characterized in that, The adjustment mechanism (113) includes multiple sets of adjustment pads and pressure plates. The adjustment pads are located below the base (111) and are used to adjust the height and horizontal position of the base (111). The pressure plates are used to press and fix the base (111) onto the working platform.

5. The welding assembly fixture for rotating cabins as described in claim 1, characterized in that, The tailstock horizontal moving device (12) is slidably mounted on the linear guide rail (112) via a first slider; the tailstock sliding locking mechanism (124) includes an L-shaped screw with a handle and a top block. The side of the first slider is provided with a threaded hole and a guide groove. The L-shaped screw with a handle is threaded into the threaded hole. The top block is movably mounted in the guide groove and is located between the inner end of the L-shaped screw with a handle and the linear guide rail (112). The axis of the L-shaped screw with a handle is perpendicular to the extension direction of the linear guide rail (112). When the L-shaped screw with a handle is rotated, the L-shaped screw with a handle pushes the top block to press against the side of the linear guide rail (112), so that the top block is pressed against the linear guide rail (112). The annular support frame (2) is slidably mounted on the linear guide rail (112) via a second slider; the annular support frame sliding locking mechanism (24) includes an L-shaped screw with a handle and a top block. The side of the second slider is provided with a threaded hole and a guide groove. The L-shaped screw with a handle is threaded into the threaded hole. The top block is movably mounted in the guide groove and is located between the inner end of the L-shaped screw with a handle and the linear guide rail (112). The axis of the L-shaped screw with a handle is perpendicular to the extension direction of the linear guide rail (112). When the L-shaped screw with a handle is rotated, the L-shaped screw with a handle pushes the top block to press against the side of the linear guide rail (112), so that the top block is pressed against the linear guide rail (112).

6. The welding assembly fixture for rotating cabins as described in claim 1, characterized in that, The screw mechanism (23) includes a nut, a screw, and a roller; The nut is threadedly engaged with the screw, and the roller is located at the inner end of the screw. The roller is positioned toward the center of the annular support frame (2) and is used to make rolling contact with the outer circumferential surface of the storage tank section of the rotating cabin.

7. The rotary cabin welding assembly fixture as described in claim 1, characterized in that, The headstock three-jaw chuck (132) and the tailstock three-jaw chuck (123) have a front jaw clamping range of φ25mm to φ280mm, a tensioning range of φ150mm to φ500mm, and a radial runout of no more than 0.056mm. The coaxiality between the clamping center of the headstock three-jaw chuck (132) and the clamping center of the tailstock three-jaw chuck (123) is no greater than 0.2 mm.

8. A welding process for a rotating cabin, characterized in that, The rotary cabin welding assembly fixture according to any one of claims 1 to 7 includes: Pre-welding cleaning is carried out on the parts of the fore compartment, aft compartment, and tank section to be welded. The front compartment and the rear compartment are respectively positioned and connected to the corresponding bow and stern connecting cover plates (3); The bow and stern connecting cover plate (3) on the front section is clamped in the head seat three-jaw chuck (132), and the bow and stern connecting cover plate (3) on the rear section is clamped in the tail seat three-jaw chuck (123). Rotate the head seat three-jaw chuck (132) and the tail seat three-jaw chuck (123) to adjust the end face flatness and outer circle runout of the front section, the rear section and the corresponding head and tail connecting cover (3); Place the tank section inside the annular support frame (2) and adjust the screw mechanism (23) of the annular support frame (2) so that the two ends of the tank section are aligned with the end faces of the front compartment section and the rear compartment section respectively; The tailstock horizontal moving device (12) is driven to move along the linear guide rail (112) toward the headstock servo drive device (13), so that the front compartment, the tank section and the rear compartment are closed, and the tailstock horizontal moving device (12) is locked by the tailstock sliding locking mechanism (124). Adjust the screw mechanism (23) of the annular support frame (2) again to adjust the radial support and outer circle runout of the tank section; Rotate the head three-jaw chuck (132) and the tail three-jaw chuck (123) to check the flatness of the head and tail connecting cover plates (3) clamped in the head three-jaw chuck (132) and the tail three-jaw chuck (123) respectively; Spot welding is performed at the docking points of the compartments; After spot welding, the rotating cabin is continuously rotated by the headstock servo drive device (13), and the docking positions of the cabin sections are continuously welded.

9. The welding process method for rotating cabins as described in claim 8, characterized in that, The spot welding and the continuous welding are respectively employed by laser autofusion welding. During spot welding, the first weld point is formed when the rotating cabin is stationary, and then the rotating cabin is driven to rotate to form multiple weld points that are spaced apart along the circumference. During continuous welding, the laser heat source continuously acts on the docking position of the sections on the outer surface of the rotating cabin, and forms a ring weld during the rotation of the rotating cabin.

10. The welding process method for rotating cabins as described in claim 8, characterized in that, The flatness of the first and last connecting cover plates (3) was measured using a lever dial indicator; The headstock servo drive device (13) is assembled and clamped by the head and tail connecting cover plate (3) and the front compartment section, which are rotated and measured by a servo motor. The tail section horizontal moving device (12) is assembled and clamped by the end connecting cover (3) and the rear compartment section by manual rotation measurement; The circular diameter of the flatness measured by the end-to-end connecting cover (3) is greater than the outer diameter of the cabin.

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