Long weld joint welding device for large rocket storage tank

Abstract

The invention belongs to the technical field of aerospace equipment manufacturing, and particularly relates to a long weld joint welding device for a large rocket storage tank, a rotary table and slidable positioning blocks arranged on the radial outer side of the rotary table are arranged on a base of the long weld joint welding device, and a barrel section of the rocket storage tank to be welded is fixed to the multiple positioning blocks. A workbench and supporting rings are sequentially and coaxially arranged on the rotary table from bottom to top, a welding machine is arranged on the workbench, and the vertical distance among the rotary table, the workbench and the supporting rings can be adjusted. A plurality of telescopic rods are arranged on the supporting ring and the workbench in the radial direction of the supporting ring and the workbench, and guide wheels in rolling contact with the inner side wall of the barrel section are arranged at the ends of the telescopic rods. According to the device, efficient positioning and accurate and stable supporting of the large rocket storage tank cylinder sections can be achieved, the supporting structure is simple, a plurality of cylinder sections can be welded section by section after the cylinder sections are positioned at a time through the multiple positioning blocks, and therefore the machining quality is guaranteed, the manufacturing efficiency is improved, and the device can be suitable for welding operation of the cylinder sections of rocket storage tanks of various sizes and is high in universality.

Description

Technical Field

[0001] The invention belongs to the technical field of aerospace equipment manufacturing, and specifically relates to a long weld welding device for a large rocket tank. Background Art

[0002] With the rapid development of aerospace technology, large-scale rocket tanks have become an important part of modern launch vehicles. Their manufacturing precision and processing quality are directly related to the performance and mission reliability of rockets. In the manufacturing process of tanks, the design of welding tooling is particularly critical. Since large-scale rocket tanks usually have the characteristics of heavy mass and large diameter-to-thickness ratio, they are generally divided into multiple barrel sections during manufacturing, and then the barrel sections are welded together one by one. The barrel sections are made of stainless steel or aluminum alloy thin walls. The welding process requires the use of welding tooling to provide stable support, precise positioning and flexible adjustment capabilities.

[0003] Traditional welding tooling is difficult to achieve efficient positioning and support of the barrel section of the rocket tank, and it is not possible to weld multiple barrel sections one by one after the welding tooling is positioned once, resulting in low welding efficiency and even processing defects. For example, the technical solution of the existing patent with announcement number CN106342017B is to arrange multiple auxiliary supports radiating outward around the inner frame, and the outer ends of the auxiliary supports are provided with an integral frame, and the outer ends of the integral frame are inlaid with arc-shaped support plates, and the product is supported by the arc-shaped support plates. Although this solution can provide strong support for the product, the support structure is too complicated and cannot achieve efficient positioning of the barrel section and welding of multiple barrel sections one by one after positioning once. Another example is the existing patent solution with announcement number CN212552384U. This solution uses a welding gun clamping mechanism to allow the welding wire to be pushed to the welding partition position. The support ring support arm is composed of retractable inner and outer arms, which can be adjusted according to different diameters. During the welding process, the support wheel rotates slowly to drive the cylinder to rotate, and the welding gun remains stationary. The weld bead forming surface is flush and has no bending, realizing the automatic circumferential weld of the partition. Although this solution discloses a simple support arm structure, the support arm cannot be raised or lowered as needed, and it is impossible to achieve one-time positioning and then welding multiple cylinder sections one by one, and it does not solve the problem of how to efficiently position the cylinder section. Moreover, this solution performs welding by rotating the cylinder, which is not suitable for welding large-scale rocket tanks. Summary of the invention

[0004] The present invention provides a long weld welding device for a large rocket tank, comprising: a base, a turntable and a plurality of slidable positioning blocks arranged on the radial outer side of the turntable are arranged on the base, and the positioning blocks are used to fix the barrel section of the rocket tank to be welded; a workbench and a plurality of support rings are arranged on the turntable in sequence from bottom to top, and the three are coaxially arranged and rotate synchronously, a welding machine is arranged on the workbench, and the upper and lower spacings between the turntable, the workbench and the support rings are adjustable; a multi-stage electric control system for adjusting the vertical height of the workbench and the support rings is arranged on the turntable. A lifting rod, the workbench and the support ring are arranged step by step on the multi-stage electric lifting rod; a plurality of multi-stage electric lifting rods are provided, and a plurality of the multi-stage electric lifting rods are coaxially arranged with the turntable; a plurality of telescopic rods are arranged on the support ring and the workbench along their own radial directions, and a guide wheel is arranged at the end of the telescopic rod, and the guide wheel includes a cylindrical structure arranged vertically in the axial direction, and the outer side wall of the cylindrical structure is used for rolling contact with the inner side wall of the barrel section when the support ring and the workbench rotate synchronously with the turntable, so as to support the barrel section during the welding process.

[0005] In a specific embodiment, the turntable is an electric turntable or a hydraulic turntable.

[0006] In a specific embodiment, sliding grooves corresponding to a plurality of the positioning blocks are radially arranged on the top of the base, and the positioning blocks slide in the corresponding sliding grooves.

[0007] In a specific embodiment, the positioning block includes a base and two rollers, the base is slidably matched with the slide groove, the two rollers are arranged at a distance on the top of the base, the two rollers are freely rotatable, and the positioning block is used to insert the barrel wall of the barrel section downward between its two rollers.

[0008] In a specific embodiment, the welding machine is a six-axis welding robot.

[0009] In a specific implementation, the telescopic rod is an electric telescopic rod, and a plurality of the electric telescopic rods are connected to the same control end, or each of the electric telescopic rods is connected to a control end.

[0010] The present invention has at least the following beneficial effects: the present invention can realize efficient positioning of the barrel section of a large rocket tank by arranging a plurality of slidable positioning blocks on the base, and by arranging the upper and lower spacings between the turntable, the workbench and each support ring into an adjustable structure, and arranging a plurality of telescopic rods along their own radial directions on the support ring and the workbench, and arranging guide wheels at the ends of the telescopic rods, so that the barrel section can be accurately and stably supported during the welding process, the supporting structure is simple, and after the barrel section is positioned once by a plurality of positioning blocks, a plurality of barrel sections can be welded one by one, thereby ensuring the processing quality and improving the manufacturing efficiency. In addition, the positioning blocks and telescopic rods in the present invention are both adjustable, and can be applicable to the barrel section welding operations of rocket tanks of various sizes, and have strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 2 is an overall structural diagram of an embodiment of the present invention.

[0012] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0013] Figure 3 This is a structural diagram of the barrel section fixed on the positioning block.

[0014] Figure 4 This is a structural diagram of the telescopic rod after being extended according to an embodiment of the present invention.

[0015] Figure 5 This is a structural diagram when welding a long weld between two barrel sections.

[0016] Figure numerals: base 1, turntable 2, positioning block 3, base 31, roller 32, slide 4, barrel section 5, workbench 6, support ring 7, first support ring 71, second support ring 72, welding machine 8, multi-stage electric lifting rod 9, telescopic rod 10, guide wheel 11. DETAILED DESCRIPTION

[0017] In order to better understand the technical solution of the present invention, the solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Embodiment 1: See also Figure 1-Figure 5The present invention provides a long weld welding device for a large rocket tank, comprising: a base 1, a turntable 2 and a plurality of positioning blocks 3 are arranged on the base 1, the turntable 2 is an electric turntable, the turntable 2 is arranged at the center of the base 1, and can rotate relative to the base 1. A plurality of positioning blocks 3 are arranged on the top of the base 1, and the plurality of positioning blocks 3 are slidably arranged on the radial outer side of the turntable 2. A slide groove 4 corresponding to the plurality of positioning blocks 3 is arranged on the top of the base 1 along the radial direction, and the positioning blocks 3 slide in the corresponding slide groove 4. When welding, according to the diameter size of the barrel section 5 of the rocket tank to be welded, each positioning block 3 is slid, and then the barrel section 5 is hoisted so that the bottom of the barrel section 5 is placed on the plurality of positioning blocks 3. In this embodiment, since the barrel section 5 of the rocket tank to be welded has a heavy weight, the slide groove 4 is set to be a structure integrated with the base 1. In this way, after the barrel section 5 is placed on the positioning block 3, the gravity of the barrel section 5 is directly transmitted to the base 1 through the positioning block 3, which can improve the bearing capacity of the positioning block 3. The positioning block 3 includes a base 31 and two rollers 32. The base 31 is slidably matched with the slide groove 4. The two rollers 32 are vertically arranged and spaced apart on the top of the base 31. The two rollers 32 rotate freely. The barrel section 5 is hoisted until its barrel wall is inserted downward between the two rollers 32 of the positioning block 3, so that the barrel section 5 is clamped. The barrel section 5 is clamped by the freely rotating rollers 32. The rollers 32 can be well adapted to the surface of the barrel section 5. When the barrel section 5 is clamped, the surface of the barrel section 5 is less damaged.

[0019] It should be noted that in other embodiments of the present invention, the turntable 2 may also be a hydraulic turntable, and one of the two rollers 32 may be set as a movable structure driven by a screw rod. Before the barrel section 5 is hoisted onto the positioning block 3, the interval between the two rollers 32 may be adjusted by a screw rod to prevent the interval between the two rollers 32 from being too small and hitting the barrel section 5, causing damage to the barrel section 5 or the rollers 32. After the barrel section 5 is placed between the two rollers 32 on all the positioning blocks 3, the two rollers 32 are adjusted by a screw rod to contact the inner wall and the outer wall of the barrel section 5 respectively, and then the barrel section 5 is completely placed on the positioning block 3, so that the barrel section 5 is clamped between the two rollers 32. Setting the rollers 32 as a movable structure driven by a screw rod can also achieve clamping of barrel sections 5 of different thicknesses.

[0020] A workbench 6 and a plurality of support rings 7 are arranged on the turntable 2 from bottom to top, and the three are coaxially arranged and rotate synchronously. A welding machine 8 is arranged on the workbench 6, and two support rings 7 are arranged, namely, a first support ring 71 and a second support ring 72. A vertically arranged multi-stage electric lifting rod 9 is arranged on the turntable. In this embodiment, the multi-stage electric lifting rod 9 is a three-stage electric lifting rod. The workbench 6, the first support ring 71 and the second support ring 72 are arranged step by step on the three-stage electric lifting rod, so that the upper and lower spacings between the turntable 2, the workbench 6, the first support ring 71 and the second support ring 72 can be infinitely adjusted, and then the height positions of the workbench 6, the first support ring 71 and the second support ring 72 can be adjusted as needed. Considering the load of the barrel section 5 and the difficulty of transporting the barrel section 5 after welding, in this embodiment, the height of the three-stage electric lifting rod after fully extending is eight meters, and the height after fully retracting is one meter. There are four three-stage electric lifting rods, and the four three-stage electric lifting rods are arranged coaxially with the turntable 2 to improve the stability of the workbench 6 and the two support rings 7. The welding machine 8 adopts a six-axis welding robot, which has a high degree of freedom and can flexibly adjust the welding position as needed to adapt to welds of various complex geometric shapes. Eight groups of telescopic rods 10 are arranged along the radial direction of the support ring 7 and the workbench 6. The ends of the telescopic rods 10 are provided with guide wheels 11. The guide wheels 11 are cylindrical structures that can rotate freely and are vertically arranged, just like the roller 32 structure of the positioning block 3. The outer wall of the cylindrical structure is used to roll with the inner wall of the barrel section 5 when the support ring 7 and the workbench 6 rotate synchronously with the turntable 2, so as to support the barrel section 5 during the welding process. The diameter of the eight groups of telescopic rods 10 with guide wheels 11 is 18 meters when they are fully extended, and the diameter of the eight groups of telescopic rods 10 with guide wheels 11 is 9 meters when they are fully retracted. The telescopic rods 10 are electric telescopic rods. The eight groups of electric telescopic rods are connected to the same control end, so that the eight groups of electric telescopic rods can be controlled to move synchronously through the same control end, which is convenient for control and makes the support of each electric telescopic rod more accurate. The driving part of the electric telescopic rod adopts a servo motor, which has high driving precision. Since the extension size of the electric telescopic rod is infinitely adjustable, it can be used to support cylinder sections of different diameters.

[0021] It should be noted that in other embodiments of the present invention, the number of support rings 7 can be selected according to actual working conditions. Depending on the number of support rings 7, the three-stage electric lifting rod can also be replaced by other multi-stage electric lifting rods 9, or each electric telescopic rod can be connected to a control end separately, so that each electric telescopic rod can be controlled separately, and the control error between the electric telescopic rods can be ensured to be within the allowable range during use.

[0022] The working principle of this embodiment: First, a barrel section 5 of a rocket tank with a diameter of ten meters is hoisted and placed on each positioning block 3, so that the barrel section 5 is clamped between the two rollers 32 on the positioning block 3, and the workbench 6 is controlled to rise to a height at which the welding machine 8 can reach the top end edge of the barrel section 5 through a three-stage electric lifting rod, and then the eight groups of telescopic rods 10 on the workbench 6 are extended to center the barrel section 5 on the base 1, and then each positioning block 3 is fixed to complete the positioning of the barrel section 5.

[0023] Then, according to the height of the next barrel segment 5 of the same diameter, the first support ring 71 and the second support ring 72 are raised, and the distance between the first support ring 71 and the second support ring 72 is adjusted by a three-stage electric lifting rod, and the next barrel segment 5 is hoisted and placed on the top of the previous barrel segment 5, and the eight groups of telescopic rods 10 on the first support ring 71 and the second support ring 72 are extended to realize the positioning of the next barrel segment 5, and a long weld is formed between the two barrel segments 5.

[0024] Then, the rotation speed of the turntable 2 is set, the welding power, wire feeding speed, shielding gas flow rate and other parameters of the welding machine 8 are set, and the turntable 2 and the welding machine 8 are started. The turntable 2 drives the workbench 6, the welding machine 8, the first support ring 71, the second support ring 72 and each telescopic rod 10 to rotate synchronously, so as to achieve the welding of the long weld formed between the two barrel sections 5, and keep the positioning of the two barrel sections 5 during the rotation welding process. Since the barrel section 5 itself is heavy, and the guide wheel 11 is set at the end of the telescopic rod 10, the telescopic rod 10 can still provide stable support for the barrel section 5 when rotating, and the guide wheel 11 can reduce the damage to the inner wall of the barrel section 5.

[0025] Finally, repeat the above operation to weld the barrel section 5 of the rocket tank section by section.

[0026] In other embodiments of the present invention, in order to improve the welding quality, a blowing mechanism can be added to the robotic arm of the six-axis welding robot. The blowing port of the blowing mechanism faces the long weld and is located at the front of the moving direction of the robotic arm. During welding, the blowing mechanism purges the weld area to be welded, thereby improving the welding quality.

[0027] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions and substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A long weld welding device for a large rocket tank, characterized in that: include: A base (1) is provided on the base (1), wherein a turntable (2) and a plurality of slidable positioning blocks (3) arranged radially outside the turntable (2), the positioning blocks (3) being used to fix the barrel section (5) of a rocket tank to be welded; a workbench (6) and a plurality of support rings (7) are sequentially provided on the turntable (2) from bottom to top, the three being coaxially arranged and rotating synchronously, a welding machine (8) is provided on the workbench (6), and the upper and lower spacings between the turntable, the workbench (6) and the support rings (7) are adjustable; a multi-stage electric lifting rod (9) is provided on the turntable (2) for adjusting the vertical height of the workbench (6) and the support rings (7), the workbench (6) and the support rings (7) being arranged The support ring (7) is arranged step by step on the multi-stage electric lifting rod (9); a plurality of the multi-stage electric lifting rods (9) are arranged, and the plurality of the multi-stage electric lifting rods (9) are arranged coaxially with the turntable (2); a plurality of telescopic rods (10) are arranged on the support ring (7) and the worktable (6) along their own radial direction, and a guide wheel (11) is arranged at the end of the telescopic rod (10), and the guide wheel (11) includes a cylindrical structure arranged vertically in the axial direction, and the outer wall of the cylindrical structure is used to roll with the inner wall of the barrel section (5) when the support ring (7) and the worktable (6) rotate synchronously with the turntable (2), so as to support the barrel section (5) during the welding process.

2. A long weld welding device for a large rocket tank according to claim 1, characterized in that: The turntable (2) is an electric turntable or a hydraulic turntable.

3. A long weld welding device for a large rocket tank according to claim 1, characterized in that: The top of the base (1) is radially arranged with sliding grooves (4) corresponding to a plurality of the positioning blocks (3), and the positioning blocks (3) slide in the corresponding sliding grooves (4).

4. A long weld welding device for a large rocket tank according to claim 3, characterized in that: The positioning block (3) comprises a base (31) and two rollers (32). The base (31) is slidably matched with the slide groove (4). The two rollers (32) are arranged at a distance on the top of the base (31). The two rollers (32) are freely rotatable. The positioning block (3) is inserted downwardly between the two rollers (32) of the barrel wall of the barrel section (5).

5. A long weld welding device for a large rocket tank according to claim 1, characterized in that: The welding machine (8) is a six-axis welding robot.

6. A long seam welding device for a large rocket tank according to claim 1, characterized in that: The telescopic rod (10) is an electric telescopic rod, and a plurality of the electric telescopic rods are connected to the same control end, or each electric telescopic rod is connected to a control end.

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