LISA: Linear immersed sweeping accumulation

作者：Mao Huachao; Zhou Chi; Chen Yong^*

来源：Journal of Manufacturing Processes, 2016, 24: 406-415.

DOI：10.1016/j.jmapro.2016.06.021

• Additive manufacturing
• CNC accumulation
• Stereolithography
• Scan line
• Building-around-insert

A novel additive manufacturing (AM) process named linear immersed sweeping accumulation (LISA) is presented in the paper. The LISA process utilizes a moving linear accumulation tool that is immersed in liquid resin to fabricate 3D objects line by line. The uniqueness of this AM process lies in three aspects: (1) the basic accumulation element in fabrication is a line segment, which is between a point-based laser spot and an area-based mask projection image. Compared to the fast building speed of the projection-based stereolithography (SL) and the high flexibility of the laser-based stereolithography, LISA can achieve a good balance between speed and flexibility; (2) the linear accumulation tool is driven by a computer numerical control (CNC) stage, which enables concurrent resin curing and recoating; in addition, (3) by incorporating 5-axis CNC motion and line-based material deposition, the LISA process can fabricate a 3D object with large fabrication volume and use a non-layer-based fabrication approach. In the paper, a linear light source that can be immersed in liquid resin and attached to a CNC stage is first presented. A sweeping path generation algorithm is then presented in order to build a3 D object line by line. An analysis model is also presented for the LISA process in order to guide the parameter settings and understand the limitations and improvements of the LISA process. Finally, several test cases have been performed to demonstrate the effectiveness and efficiency of the developed AM process.

• 出版日期2016-10