Multi-energy beam high-efficiency additive manufacturing method

Abstract

The invention discloses a multi-energy beam high-efficiency additive manufacturing method. The multi-energy beam high-efficiency additive manufacturing method is characterized in that a plurality of energy beams exist in one surface, each energy beam can irradiate an entire forming region, the energy beams perform mutually independent scanning and / or mutually matched scanning on a to-be-formed region, and raw material powder is formed in the to-be-formed region. According to the multi-energy beam high-efficiency additive manufacturing method, scanning processing is carried out through the plurality of energy beams, scanning strategies of more varieties can be achieved, forming efficiency of equipment can be improved, microscopic structures of components can be regulated, forming internal stress is improved, and forming quality of the components is improved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and more specifically relates to a multi-energy beam high-efficiency additive manufacturing method. Background technique [0002] Metal Additive Manufacturing (MAM) is the most important branch of additive manufacturing technology. It uses metal powder / wire as raw material, high-energy beam (laser / electron beam / arc / plasma beam, etc.) A new technology that melts and accumulates materials layer by layer to manufacture high-performance metal components. It has the advantages of short forming cycle, high utilization rate of raw materials, and the ability to form components with arbitrary complex shapes. Widely used in aerospace, automobiles, military weapons, biomedical and other fields. Nevertheless, with the rapid development of aerospace technology and weaponry, higher requirements are placed on the forming efficiency of metal additive manufacturing technology. [0003] The pate...

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Problems solved by technology

[0003] The patent "A high-efficiency forming equipment and method for laser selective melting", application number "201611199926.3" proposes a method based on two forming cylinders and a single laser beam alternately forming two components, shortening the time for powder spreading, thereby improving the forming efficiency of equipment However, the rotating forming cylinder platform reduces the overall forming efficiency. On the other hand, the rotation of the forming cylinder platform may affect the quality of powder coating

The patent "multi-beam additive manufacturing", application number "201680034015.7" proposes a multi-beam additive manufacturing technology method, which expands the overall forming area by increasing the number of laser beams, thereby improving the forming efficiency of the equipment. However, the forming efficiency of a single area is still no improvement

The patent "Additive Manufacturing Device Using Electron Beam-Laser Composite Scanning", application number "201510104702.9" proposes to use multiple electron beam and laser beam composite scanning methods to realize additive manufacturing, which improves the efficiency of forming equipment and expands the forming area. However, each electron beam and laser beam can only form the corresponding area, and each energy beam cannot irradiate the entire forming area, and the various scanning strategies mentioned above cannot be realized; the patent "Laser selective melting based on four laser double stations SLM equipment and processing method", application number "201310670777.4", proposes to improve the forming efficiency of large-size components by combining low-power scanning of several layers of contours and high-power forming single-layer solids, because the high and low power used in this method is The step-by-step scanning method does not scan the components at the same time, which limits the further improvement of the forming efficiency to some extent

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