Arrangement and scanning strategy for multiple same-cabin parts of selective laser melting strip-shaped structure

Abstract

The invention provides an arrangement and scanning strategy for multiple same-cabin parts of a selective laser melting strip-shaped structure. The arrangement and scanning strategy comprises a multi-laser arrangement strategy, a part placement strategy and a laser cooperative scanning strategy of selective melting additive manufacturing equipment involved in the method. When the number of the cabins is not less than four, the utilization rate of equipment space is improved through the strategy that the same cabins are arranged at equal intervals; the number of the lasers is determined according to the number of the parts, the number of the lasers is 2-4 times that of the parts, the number of effective lap joint areas is minimum, the debugging time is shortened, and the additive forming efficiency is improved; in order to solve the problem of splashing interference of printing of multiple pieces in the same cabin, the invention provides a full headwind, multi-laser same-direction and asynchronous scanning strategy, the problem of mutual connection of splashing of the multiple pieces in the same cabin is solved, and the forming quality is ensured. By means of the method, manufacturing of more than four strip-shaped products in the same cabin and the same strategy can be achieved while the product quality is guaranteed, the manufacturing efficiency is improved to 400% or above, and the additive forming cost is reduced by 60%.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and relates to a strategy for arranging and scanning multiple parts in the same cabin of a strip-shaped structure by selective laser melting. Background technique [0002] Selective laser melting is currently the most widely used metal additive manufacturing technology. The powder bed melting method can realize the layer-by-layer processing and manufacturing of metal parts, so the forming structure is complex and the manufacturing efficiency is high. Since the selective laser melting additive manufacturing technology can realize the rapid manufacturing of integrated, lightweight and functional structures, it has been gradually applied in aerospace, military, medical, abrasive tool manufacturing and other fields, especially in the aerospace field. The biggest users of melting additive manufacturing technology are China Aerospace Science and Industry Corporation, China Aerospace Scie...

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Problems solved by technology

For increasing the layer thickness, the currently used 60um layer thickness is the limit under the existing process system, and further improvement will lead to the deterioration of roughness

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