Research on STL Model Center Layout Strategy in 3DP Technique

doi:10.3901/JME.2023.01.249

Abstract

Abstract: Aiming at the problem of part layout in 3DP technique, the rotation of parts in the layout process is limited due to the difference of step errors caused by different parts forming directions. At the same time, parts need to leave a gap,in order to avoid the impact of adhesive penetration between them. Based on the fact that the forming quality of the parts in the center of the powder bed is usually better than that in the surrounding areas, a central layout strategy of STL model based on projection algorithm is proposed. In this method,the three dimensional layout problem is transformed into two-dimensional irregular layout. The layout ring is used as the moving path of the parts, the layout point is used as the reference position of the model movement, and the layout result is evaluated by the circular space on the two-dimensional plane, so as to realize the center layout of multiple parts. Three groups of examples are carried out with two types of typical STL models. The results show that the central layout strategy has achieved good layout effect on different types of parts.

Key words: 3DP technique, STL model projection, irregular layout, layout circle

CLC Number:

TH164

YANG Weidong, LIU Zhiyue, WANG Yuanyuan, ZHU Dongbin, ZHANG Zhengyan. Research on STL Model Center Layout Strategy in 3DP Technique[J]. Journal of Mechanical Engineering, 2023, 59(1): 249-258.

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