Xi'an Jiaotong University

Xi'an Space Engine Company Limited

Huanqing Yang

Lin Wang

Dongjian Peng

Jing Bai

Hulin Li

Yun Wang

Zhengying Wei

Xuhui Lai

An EBM variable-direction formation dynamic slicing method in cooperation with an 840D digital control system includes: creating a vertex array object, adjusting a projection matrix to a slice height, outputting a binary image of a two-dimensional cross-section; obtaining, by means of two-dimensional contour extraction, data of a contour line from the binary image, outputting coordinates of a closed contour, and connecting all adjacent coordinates into a straight line to form a closed curve; when a triangle tolerance is 1, dividing contour data into a straight line part and a curve part by taking a starting point of small straight lines with an angle of 140° therebetween as a dividing point, removing adjacent points, repeated points and internal points of a same straight line, and performing segmentation fitting on curve parts of the slice data, and then performing dynamic slicing through the 840D numerical control system.

Dynamic slicing method for additive manufacturing forming with variable forming direction

A method for forming a multi-material part by selective laser melting includes the following steps. Modeling is performed by regularly distributing and arraying a combination of materials that meets forming requirements such that a part model is designed. The designed part model is subjected to a dimension compensation, a shape compensation, a chamfering setting, a margin design and a design of a process support to obtain a process model. The obtained process model is sliced into a series of layers. Type, distribution and boundary information of materials in each layer are collected to generate a control file. All materials required for part forming are loaded into an additive manufacturing equipment. After a state of the additive manufacturing equipment meets forming requirements, a part is formed under the control of the generated control file. Post-processing is performed after the part is formed.

Method for forming a multi-material part by selective laser melting

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Shaanxi, China

Huanqing Yang