Method for manufacturing aluminum magnesium alloy structural parts through hammering reinforced arc added materials

Abstract

The invention discloses a method for manufacturing aluminum magnesium alloy structural parts through hammering reinforced arc added materials. The method comprises the following steps: 1) a substrateis cleaned; 2) an aluminum magnesium alloy structural part three-dimensional model is leaded into slicing software for slicing and path planning; and generated slicing files are leaded into a controlsystem; 3) process parameters comprising the welding speed, the wire feeding speed and the air flow are set; and the control system is used for layer-by-layer added material manufacturing of the aluminum magnesium alloy structural part according to the set process parameters and the slicing files; 4) after one layer of added material manufactured aluminum magnesium alloy structural parts are molded, the center of a hammer head is adjusted to overlap with the center of a welding bead; and hammering is performed according to a molding path; and 5) the steps 3) and 4) are repeated to finish wholearc added material manufacturing of the aluminum magnesium alloy structural parts and hammering strengthening. Air holes in hammered components are closed, so that the porosity is greatly reduced; and meanwhile, through deformation strengthening, the overall mechanical performances of the components are improved, and the mechanical performances are uniform.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to an arc additive manufacturing strengthening method for aluminum-magnesium alloys. Background technique [0002] Arc fuse additive is an efficient and fast manufacturing process, especially suitable for forming large and complex curved surfaces and cross structural parts. Using arc welding machine as heat source, alloy welding wire as raw material, and then using robot as path walking mechanism to directly form large metal structural parts has become a current research hotspot. The use of arc additive technology to directly form large metal structural parts with complex structures is more efficient and lower cost than traditional casting and forging processes. [0003] Aluminum alloy has the characteristics of low density, high specific strength and good formability, and is widely used in aerospace, shipbuilding and other fields. At the same time, due to the goo...

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Problems solved by technology

[0004] Aluminum-magnesium alloys have medium strength, but in the process of additive manufacturing of aluminum alloys, due to layer-by-layer accumulation, especially for aluminum-magnesium alloys, compared with other aluminum alloys, it is inevitable to There are stomata defects;

[0005] The Chinese Patent Application Publication No. CN106312461A (Application No. 201610887150.8) published on January 11, 2017 proposes a method and steps for the preparation of large aluminum alloy structural parts. The CMT process can quickly prepare large aluminum alloy structures with good performance Parts, use MIG or TIG to connect the main body and the suspended part, but there are inevitably defects such as air holes in this process

[0006] Chinese Patent Application Publication No. CN 106903394A published on June 30, 2017, proposes a method for additive manufacturing of aluminum-magnesium alloys, and proposes a cleaning method for the surface of the substrate, which improves the bonding force between the substrate and the components, and removes oil stains on the surface of the substrate , it is beneficial to reduce the pores remaining in the component, but it cannot completely eliminate the pores

[0007] In addition, after direct forming, the parts are in the cast state, and the mechanical properties are difficult to meet the requirements of use. Therefore, it is necessary to assist other means to carry out subsequent strengthening, reduce defects in the alloy, and improve the comprehensive mechanical properties of the aluminum-magnesium alloy.

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