Simulation and Improvement of the SS 316L Powder Flow in Direct Energy Deposition Process

• Main Authors: Yao-MinShi, 施曜民
• Other Authors: Huei-Huang Lee
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/gn7z77

碩士 === 國立成功大學 === 工程科學系 === 105 === AM (Additive manufacturing) is a novel technique to manufacture physical parts layer by layer using discrete materials such as liquid, powder, silk, film, plate, block, etc. Different from the traditional processing methods using equipment to subtract parts, for example, the use of lathe processing, grinding, etc. The purpose of AM is to achieve personalized design, waste minimization. The process has advantage of customization, energy saving, rapid, flexible and high-performance performance. Currently, medical parts or aerospace parts can use this technology for a small number of direct manufacturing products. Although the additive manufacturing technology has many advantages, there are still some bottlenecks need to overcome. The influence of process parameters on the quality of cladding needs to be studied. In order to design a robust process, the materials and heat transfer knowledge are essential. The related literature must be searched to define appropriate performance index. Meanwhile picking out important experiment parameters, so that the research process more efficient and the results more valuable. To simplify the complexity of laser cladding experiment design, we listed total adjustable parameters table, excluding the less impact of experiment factors, and first sorted out the appropriate setting range of parameters. The relationships between parameters and performance indices of cladding would be analyzed by using Taguchi methods. It was possible to find the significant of cladding with limited numbers of experiments by applying orthogonal arrays. In this paper, the direct manufacture of rectangular thin-walled parts were analyzed to find out the key factor parameters on the surface evenness and cladding height of the impact and confirmed the difference before and after.