A method and device for controlling the deflection of the flow spinning welding seam of the welding cylinder

Abstract

The invention discloses a method and a device for controlling deflection of a flowing spinning welding seam of a winded welding cylinder. A tail constraint device is adopted to impose restriction on flowing spinning of a cylinder blank to change the distribution characteristics of a stress strain field during forming and limit flowing of circumferential material so as to further control deflectionof the welding seam and obtain a straight welding seam cylinder material. The tail constraint device comprises a belt trough core die, a rolling guide rail, a grading sliding block, a cylinder blankclamping plate, a spinning wheel and a tail top, wherein the rolling guide rail is fixed at the bottom of a core die groove; the grading sliding block is positioned on the rolling guide rail; the endpart of the grading sliding block is connected with the tail end of a cylinder blank non-forming section to constrain circumferential torsion of the cylinder blank relative to the core die during thespinning process so as to obtain the straight welding seam cylinder material. The constraint device can flexibly change the grading sliding block or increase or decrease the number of the grading sliding block to be adapted to spinning of the cylinder blanks with different lengths according to the blank length. The method and the device can efficiently and precisely control deflection of the welding seam and have the characteristics of being simple and compact in structure, easy to manufacture and process, convenient to dismantle and mount, high in forming efficiency and excellent in universality.

Description

technical field [0001] The invention relates to the field of advanced forming manufacturing, in particular to a method and a device for controlling the deflection of the flow spinning welding seam of a welding cylinder. Background technique [0002] The rapid development of aviation and aerospace high-end equipment urgently requires the development of thin-walled, lightweight, and large-scale integrated key components. Wider and larger thin-walled slabs are required. Due to the high deformation resistance of the material and the ultra-wide size, the direct rolling method to form ultra-wide slabs has problems such as high requirements for equipment forming capabilities, high production costs, and difficulty in controlling the shape of the slab. Forming preparations face great challenges. It is an effective method to form an ultra-wide slab by rolling and welding the thick plate into a cylinder in advance, then flow spinning to make it thinner and grow, and then shearing and ...

AI Technical Summary

Problems solved by technology

However, since the deflection degree of the weld seam in the flow spinning of the welding drum strongly depends on many forming parameters such as the welding drum, the mold, and the spinning process, it is difficult to establish a quantitative relationship between the forming parameters and the deflection degree of the weld seam. Different forming components need repeated trial and error to adjust the matching of forming parameters in different passes to achieve weld straightening. There is a lot of blindness in the process design, which is time-consuming and labor-intensive, and the universality is poor.

In addition, this method must go through multiple passes of spinning to obtain a straight welded tube, and the production efficiency is low. Therefore, it is urgent to study and develop a new method for controlling the deflection of the welding seam by the flow spinning of the coiled welding tube.

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