Pre-compensation of Warpage for Additive Manufacturing  

作　　者：Christoph Schmutzler Fabian Bayerlein Stephan Janson Christian Seidel Michael F. Zaeh 

机构地区：[1]Institute for Machine Tools and Industrial Management, Technical University Munich, Augsburg 86153, Germany [2]Fraunhofer Research Institution for Casting, Composite and Processing Technology IGCV, Augsburg 86153, Germany

出　　处：《Journal of Mechanics Engineering and Automation》2016年第8期392-399,共8页机械工程与自动化（英文版）

摘　　要：Additive manufacturing technologies enable the production of parts by successively adding layers. In powder-based technologies, each powder layer is selectively solidified following the respective cross-section of the parts either by the application of high-energy radiation or by the selective deposition of binder. By repeating the steps of layer deposition and selective solidification, parts are fabricated. The layer-wise build-up and the ambient conditions lead to warpage of the parts due to the temporarily and locally uneven distribution of shrinkage throughout the part. This leads to deviations in shape and dimension. The development of these technologies fosters a change fi＇om prototyping to manufacturing applications, As a consequence, higher standards regarding the shape and dimensional accuracy are required. Therefore, new strategies to minimize the resulting deformations are necessary to reduce rejects and widen the range of applications of the described technologies. In this paper, an empirical, a knowledge-based and a simulative approach for warpage compensation are introduced. They are all based on the pre-deformation of the digital 3D part geometry inverse to the expected deformation during manufacturing. The aim of the research is the development of a comprehensive method that enables users to improve their part-quality by supporting the pre-deformation process. Contrary to existing work, this method should not be process-specific but cover a wide range of additive manufacturing techniques. Typical forms of deformation of the processes laser sintering, laser beam melting and 3D printing （powder-binder） are presented and compensation strategies are disenssed. Finally, an outlook on the ongoing research is given.

关 键 词：Additive manufacturing SHRINKAGE WARPAGE COMPENSATION PRE-DEFORMATION simulation. 

分 类 号：TQ172.623[化学工程—水泥工业] S816.7[化学工程—硅酸盐工业]