Additive and subtractive manufacturing device and additive and subtractive composite manufacturing method thereof

Abstract

The invention relates to an additive and subtractive manufacturing device and an additive and subtractive composite manufacturing method thereof. The additive and subtractive manufacturing device comprises a matrix; and the matrix is provided with a rotating platform with three degrees of freedom, an SLM laser scanning device and an ultrafast laser polishing device which can move in a single-degree-of-freedom mode, a high-speed numerical control machining unit with two translational degrees of freedom, a high-precision three-dimensional vision measurement device and a radiological flaw detection system. By adopting the additive and subtractive manufacturing device, laser additive manufacturing, high-speed numerical control cutting machining and ultrafast laser polishing surface treatment are alternately carried out in one device, so that the size precision and the surface roughness which are equivalent to those of a machining center are achieved, and manufacturing of a high-precision inner cavity structure and a shape follow-up channel which cannot be achieved by the machining center can also be achieved; and free manufacturing of laser additive manufacturing, high-speed and high-precision manufacturing of the machining center and surface treatment with ultrafast laser polishing are successfully integrated, and the comprehensive performance of a produced part is improved.

Description

technical field [0001] The invention belongs to the field of laser additive manufacturing, and in particular relates to an additive and subtractive material manufacturing device based on SLM forming and an additive and subtractive material composite manufacturing method thereof. Background technique [0002] With the development of metal 3D printing technology, its application in aerospace, automotive, medical, mold and other fields is becoming more and more extensive. The slow forming speed and high processing cost of metal 3D printing are the main constraints restricting its promotion and application in the market. At present, in SLM processing, due to the huge temperature gradient and the influence of the complex structure of the product, defects such as holes, microcracks and cracks often appear in the metal products formed by SLM. These defects are the key factors leading to poor mechanical properties. For parts with complex internal flow channels, such as conformal co...

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Problems solved by technology

[0003] The present invention aims at defects such as holes, micro-cracks and cracks that often appear in metal products formed by SLM. Parts with complex inner cavity structures cannot be effectively reprocessed on the inner surface, and SLM processing still has disadvantages such as low production efficiency and high processing costs. A SLM-based additive and subtractive material manufacturing device and its additive and subtractive material composite manufacturing method are proposed

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