Multi-layer double-channel electric arc additive manufacturing method for aluminum alloy structural component

Abstract

The invention provides a multi-layer double-channel electric arc additive manufacturing method for an aluminum alloy structural component. According to the method, a welder is adopted for supplying a heat source and matched with a mechanical arm for electric arc additional manufacturing of the aluminum alloy structural component in a route planning mode. Three layers at the bottom adopt electric current which is about 20-50 A larger than forming electric current for priming; and the forming electric current is adopted by the upper portion for entity piling up, the arcing points of an inner channel and an outer channel of each layer are a pair of diagonal points, reciprocating is conducted in this way, and finally the multi-layer double-channel aluminum alloy structural component is obtained. By adjusting parameters, electric arc material addition of the aluminum alloy structural component with the wall thickness being 10-25 mm can be achieved, so that specific dimension requirements are met. The aluminum alloy structural component formed through electric arc additive manufacturing provided by the invention is good in mechanical property, low in surface roughness, free of crack defects, high in material utilization rate and short in production period; the effect of quick manufacturing of a large-wall-thickness aluminum alloy structural component in a development stage is achieved; and meanwhile, the problems of a long production period and the like which are caused due to the fact that moulds need to be manufactured in a traditional casting method are solved, and product cost is effectively reduced.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to a multilayer double-channel arc additive manufacturing method for aluminum alloy structural parts. Background technique [0002] Aluminum alloy has the advantages of low density and corrosion resistance. It can effectively reduce its weight and increase the thrust-to-weight ratio when used in aerospace vehicles. Therefore, it is widely used in aerospace and other fields that require lightweight. Traditional aluminum alloy processing methods mainly include casting and mechanical processing, etc. Although they can meet the requirements of processing accuracy, they have disadvantages such as difficult processing, cumbersome procedures, low material utilization, high production costs, and long production cycles. In the actual development and production, sometimes it is necessary to repeatedly design and verify the product, and the product size and structure also need...

AI Technical Summary

Problems solved by technology

Traditional aluminum alloy processing methods mainly include casting and mechanical processing, etc. Although they can meet the requirements of processing accuracy, they have disadvantages such as difficult processing, cumbersome procedures, low material utilization, high production costs, and long production cycles.

In the actual development and production, sometimes it is necessary to repeatedly design and verify the product, and the product size and structure also need to be changed at any time. The traditional processing method not only has a long production cycle, but also greatly increases the cost.

At the same time, there are many macroscopic defects and composition segregation in cast parts, which directly affect product performance

The existing manufacturing technology is difficult to meet the rapid and changeable development and production needs of new products

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