A method for additive manufacturing of aircraft wing spar parts

Abstract

The invention discloses an additive manufacturing method for aircraft wing spar components. Each aircraft wing spar component comprises a web, edge strips and stand columns. The additive manufacturing method comprises the following steps: while processing, firstly mounting a base plate on a position changing machine, taking a state that a working surface of the base plate is parallel to the ground as an initial state, depositing two edge strips and the web on the base plate, independently depositing the web when height of the two edge strips and the web reaches designed height at which the lower surface of the stand column to be deposited in the next step is located, enabling a height difference between the web and the edge strips to reach a thickness of the stand column, turn a workbench of the position changing machine around a turnover shaft by 90 degrees, enabling the web to be parallel to the ground, and arranging the web below the edge strips; then, depositing the stand columns according to a designed dimension, reversely turn the workbench of the position changing machine around the turnover shaft by 90 degrees after the stand column is deposited so as to enable the workbench of the position changing machine to return to the initial state, then, depositing the two edge strips and the web, continuously repeating the process; and finally, completing the processing of the aircraft wing spar components. The components processed by the method are uniform and consistent in tissue, and are very small in deformation.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, in particular to aircraft wing spar parts (such as figure 2 shown) additive manufacturing method. Background technique [0002] An aircraft wing spar part is composed of three parts: a web, an edge strip and a column. At present, the additive manufacturing method for this kind of aircraft wing spar parts can be arc wire feeding additive manufacturing or laser powder feeding melting additive manufacturing. The traditional method is horizontal, and the base plate with the same size as the web is selected, and the base plate is the web after the processing is completed. Select the starting point of the deposition of the edge and the column on the substrate, and deposit the column and the edge layer by layer according to the designed size of the column and the edge until the deposition height reaches the height of the edge and the column. The processing schematic diagram is as follows figure...

AI Technical Summary

Problems solved by technology

[0007] In the additive manufacturing process, under the action of local heat sources, the temperature distribution on the substrate and the deposited part is uneven, resulting in inconsistent expansion and contraction of various positions on the substrate and parts. When using the horizontal method, the substrate is used as a web. Due to the large area of ​​the web and the large ratio of length to width, there is a large residual stress in the part after the deposition is completed, and it is very easy to deform, so the machining accuracy becomes poor

In addition, because the base plate is a rolled structure, the base plate is the web after processing, while the edge strip and the column are welded structures, and the two are very different. Different, prone to stress concentration, and thus prone to cracks

Images