Axial continuous path friction stir additive manufacturing process for large thin-walled high-tube rings

Abstract

Provided is a manufacturing process of a large thin-wall high-cylinder ring axial continuous path stirring friction additive. The size and number of plates for standard incremental rings are firstly determined; the standard incremental rings on the first layer are prepared; axial continuous path stirring friction additive welding of the plates on the second layer is carried out; a circulating large ring multilayer axial continuous path stirring friction welding additive on the (3-N) layer is manufactured; and finally machining is carried out on the lower end face of the first layer and theupper end face of the N layer, and a large ring which finally meets he large ring axial height and is good in structural uniformity is obtained. According to the manufacturing process, the problem of preparation of a large thin-wall cylindrical part unit is reasonably solved, the number of scoop holes is effectively reduced, and a good ring forming effect is achieved.

Description

technical field [0001] The invention belongs to the field of forming and manufacturing technology of large ring parts, and in particular relates to an axial continuous path friction stirring additive manufacturing technology of large thin-walled high-tube ring parts. Background technique [0002] At present, the commonly used manufacturing technologies for thin-walled cylindrical parts are ring rolling and spinning technologies. The ring rolling of large and medium-sized rings requires the use of multi-specification ring rolling mills and multi-pass forming. For large rings, especially rings with a diameter of 10 meters or more, the rolling process requires a large forming force, difficult quality control, and is prone to failure. The problem of eccentricity, and it is difficult to apply to thin-walled cylindrical parts with large heights. Spinning with a mandrel is difficult to apply to the forming and manufacturing of cylindrical parts with a diameter of more than 2.5 met...

AI Technical Summary

Problems solved by technology

The ring rolling of large and medium-sized rings requires the use of multi-specification ring rolling mills and multi-pass forming. For large rings, especially rings with a diameter of 10 meters or more, the rolling process requires a large forming force, difficult quality control, and is prone to failure. Eccentricity problem, and it is difficult to apply to thin-walled cylindrical parts with large height

Spinning with a mandrel is difficult to apply to the forming and manufacturing of cylindrical parts with a diameter of more than 2.5 meters. Spinning with opposite wheels is suitable for the forming and manufacturing of large-diameter cylindrical parts, but it is prone to instability when the height is large, and there is currently no diameter above 10 meters. Forming equipment

[0003] The Chinese patent (publication number CN 106925884 B) proposes an axially stacked friction stir welding additive forming process for large thin-walled rings. Large thin-walled rings cannot be directly produced by radial-axial hot rolling, and the processing cost is high and the efficiency is low

The Chinese patent (publication number CN107020447 B) proposes a composite laminated friction stir welding additive forming process for large thick-walled cylindrical parts. Friction stir welding is used for radial and axial laminated welding, and the welding wire is continuously filled without considering the material at the keyhole. Performance problems; and the size of the billet is too large, it is difficult to control the uniformity of the structure, and the requirements for equipment and site are also relatively large, resulting in high waste of materials and energy

The corresponding auxiliary clamping process is complicated, the control is difficult, and the quality of the welding surface performance is poor, which cannot meet the preparation accuracy and quality of large rings

[0004] For the forming and manufacturing of large-diameter rings, friction stir welding additive manufacturing can be used to realize the forming of large-scale rings, but there is no effective method for the preparation of single-piece rings, and the processing of keyhole defects is not considered. Keyhole repair welding is relatively difficult. more, it will affect the overall structural performance

Images