Selective laser melting and laser shock peening composite additive manufacturing device and method

Abstract

The invention discloses a selective laser melting and laser shock peening composite additive manufacturing device and method. A selective laser melting additive manufacturing technology and a laser shock peening technology are mutually combined, and the device is reasonable in structural design, easy to operate and high in applicability; metal powder is evenly laid through a powder laying device, two powder storage chambers and a powder laying guide rail, laser beam multi-angle scanning is achieved through a scanning galvanometer system and a laser scanning generator, namely, the selective laser melting additive manufacturing process is carried out, and an additive component in a preset shape can be efficiently and rapidly produced; and laser shock peening is carried out on the surface of an additive material in a thermal state, so that air hole and crack defects inside the additive material component are eliminated, the surface stress state of the additive component is regulated and controlled, and the problems that the fatigue life of a part is shortened, the geometric structure of the part is distorted and cracks are generated in the material due to the tensile residual stress generated in the selective laser melting additive process are effectively solved, so that the purpose of improving the performance of the component is achieved.

Description

technical field [0001] The invention relates to the technical fields of laser additive manufacturing and laser shock strengthening, and more specifically relates to a composite additive manufacturing device and method of laser selective melting and laser shock strengthening. Background technique [0002] Selective Laser Melting (SLM), also known as laser powder bed melting, is one of the most widely studied and mature additive manufacturing technologies. With the continuous advancement of technology, the reliability, part density, productivity and material processing range of SLM have been significantly improved. A well-known advantage of SLM is the ability to produce complex geometric shapes that cannot be obtained by traditional processing methods. [0003] However, when SLM technology is printing, the biggest disadvantage is the accumulation of residual tensile stress, because the residual tensile stress will significantly reduce the fatigue life, distort the geometric st...

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Problems solved by technology

[0005] In view of this, the present invention provides a laser selective melting and laser shock strengthening composite additive manufacturing device and method, through laser shock strengthening in the laser selective melting and additive process, effectively solve the problem of traditional additive manufacturing process Fatigue performance degradation caused by residual tensile stress accumulation of additive components

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