High-energy beam scanning path planning method for manufacturing of addition materials

Abstract

The invention relates to a high-energy beam scanning method capable of improving shaping quality and efficiency of members and for manufacturing of addition materials. Different scanning paths have important influence on the respects of precision, intensity, buckling deformation and processing efficiency of shaped members. The invention provides the high-energy beam scanning path planning method based on combination of inner outline and outer outline deflexion scanning and interval partition straight line return scanning. The high-energy beam scanning path planning method comprises the following steps of under optimized condition of technological parameters ( including the high-energy beam power, the scanning speed, the overlapping rate and the like ), according to two-dimensional sectioninformation of a digital model to be scanned, firstly performing deflexion scanning along the inner outline and the outer outline of a section for some times, then performing partition on remaining region surrounded by outline deflexion lines, and finally, according to a specific logic sequence, performing return scanning on each partition along parallel straight lines. The high-energy beam scanning path planning method disclosed by the invention has the beneficial effects that thermal stress accumulating is avoided, so that deformation is reduced; idle stroke is reduced, so that efficiency isimproved, and the service life of the high-energy beam device is prolonged; and the dimension precision and surface quality of the shaped members can also be guaranteed, so that the performances of the members are improved.

Description

technical field [0001] The invention relates to a high-energy beam scanning path planning method. Specifically, it relates to a high-energy beam scanning path planning method for additive manufacturing. Background technique [0002] The high-energy beam additive manufacturing process uses the cross-sectional information obtained by layered slicing of the 3D model to control the high-energy beam to melt the material layer by layer and accumulate it into a fully fused (metallurgically bonded) component. In the additive manufacturing process, the process parameters, high-energy beam diameter, and scanning path may have a great impact on the quality of the formed part; at the same time, due to the single-point high-energy loading method, the energy loading and the resulting forming time of each part There is a sequence, the temperature and stress of different positions in the same layer are different due to different scanning sequences, resulting in uneven shrinkage of the work...

AI Technical Summary

Problems solved by technology

Contour offset scanning will make it difficult to release the stress of the inner layer outward, and the workpiece will be easily deformed; the forming effect of the round-trip parallel scanning is better, but it is easy to produce multiple empty strokes when scanning the section with holes or grooves, which affects the forming efficiency and Effective Use of High Energy Beam Devices

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