The Study of the Mechanical Properties in the course ofLow Temperature Arc Spray Rapid Tooling

• Main Authors: Chien-Yu Ko, 柯建宇
• Other Authors: Hung-Yuan Li
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/66633616069230838430

碩士 === 國立高雄應用科技大學 === 模具工程系碩士班 === 93 === Rapid tooling technology has been adopted as a new and perspective technology in these ten years. Many manufacturing approaches have been developed. In this research, low temperature arc sprayed combined with metal epoxy technologies are used. The arc spared tooling has the advantages such as short manufacturing time and strong tooling surface. It was made by arc spraying a thin metal coating, typically Zn-Sn alloy, on the pattern. The back of the coating is reinforced by metal epoxy which is made by mixing metal powder, typically Aluminum, in the epoxy. The built-up time of this tooling can be short to 2-3 days and the tooling can be manufactured by traditional methods such as milling and EDM. The manufacturing processes of these two technologies were well developed. In this research, the objective is to investigate the mechanical properties of these two technologies under different manufacturing parameters using Taguchi experimental method. Arc spray voltage, electric current, air pressure and the stand-off distance were chosen as the factor in the arc spray technology to study the influences of the microstructure, wear resistances, arc spray temperature, micro surface roughness, Young's modulus and thermal conductivity. Each factor has 3-4 different levels. The mixing ratio of different epoxy resin, aluminum powder and aluminum grain were selected to study the tensile strength and thermal conductivity in the metal epoxy approach. Experimental results established the manufacturing parameters’ relations to the mechanical properties. The mixing ratio of the metal epoxy was also obtained for the better strength. Keyword: arc spray , epoxy aluminum mold , Taguchi experimental method ,rapid prototype , rapid tooling