Positioning support device used for stirring, rubbing and welding circular seam of flange disc of top cover of storage box

Abstract

The invention belongs to a machining process device of an aerospace product, and in particular discloses a positioning support device used for stirring, rubbing and welding a circular seam of a flange disc of a top cover of a storage box. The machining process device comprises a positioning supporting rotary support, wherein a circular base plate is arranged above the positioning supporting rotary support; an outer pressing ring is arranged above the circular base plate; round holes coaxial with a central hole at the lower bottom surface of the positioning supporting rotary support are arranged in the circular base plate and a center of the outer pressing ring; a central shaft is arranged inside the hole; the lower end of the central shaft is fixed on the positioning supporting rotary support; an outer clamping ring is arranged on the circular base plate; the outer clamping ring is connected with the outer pressing ring through a fastening structure; and a lock wire nut is arranged at the top end of the central shaft. The outer clamping ring, the outer pressing ring and the unique fastening structure have a positioning clamping function to a whole welding product; the outer clamping ring and the central shaft are concentric so as to have a function of positioning a rotation center; a design of the fastening structure has a transition function to connection of a whole positioning support device in a mode that bearing outer pressure is converted into a clamping force, and thus the machining process device is applicable to requirements on high precision in welding and assembling.

Description

technical field [0001] The invention belongs to aerospace product processing technology equipment, and in particular relates to a positioning support device. Background technique [0002] The propellant tank is the fuel tank of the launch vehicle, which has a large diameter (φ2250~5000mm), thin material (3.7mm--7mm), and weak structural rigidity. The storage tank is generally welded by structural parts such as front and rear short shells, front and rear bottoms, and middle shell sections. The front and rear bottom covers usually include a tailor-welded structure with a flange and a circular arc top, and the general material is aluminum alloy. [0003] Welding adopts advanced welding methods such as friction stir welding, which require the product to be placed horizontally and rotate along the axis. [0004] The welding difficulty of this large thin-walled structural part lies in that the welding area is relatively thin, and the thickness of the welding area of ​​the thinne...

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Problems solved by technology

[0004] The welding difficulty of this large thin-walled structural part lies in that the welding area is relatively thin, and the thickness of the welding area of ​​the thinnest shell section is 3.7mm; the structural size is large, the rigidity of the box is poor, the resistance to deformation is poor, and the assembly is extremely difficult; the above situation makes The difficulty of welding the ring seam of the flange is greatly increased, and relevant measures need to be taken to solve it

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