叠片在热加压下制造工艺的研究外文文献翻译、中英文翻译、外文翻译.docVIP

外文翻译 Study of laminated object manufacturing with separately applied heating and pressing Springer-Verlag Abstract To improve the hot-pressing process currently employed in laminated object manufacturing (LOM),an innovative heating-and-pressing separation system is proposed, and heat transfer problems of this system are investigated. A thermal model is first established. It is solved numerically by the finite element method (FEM) software ANSYS, and verified by experiments. Based on the numerical solution under various operating conditions, it is found that the operating temperature of an adhesive can be reached quickly when the heater is maintained at a higher temperature, corresponding to a deeper heat-affected zone. This shortcoming can be effectively reduced if the speed of the heater is increased. Hence, a higher heater temperature together with a higher moving speed is suggested to shorten processing time and promote manufacturing efficiency. Through analysis, the appropriate distance between the roller and the heater, so as to obtain finished parts of high quality, is determined. Keywords Heat affected layer. Laminated object manufacturing .Rapid prototyping . Thermal model 1 Introduction Rapid prototyping (RP) manufacturing technology has been highly valued and explored by manufacturing industries and scientific institutes worldwide in recent years. Laminated object manufacturing (LOM) is one of the RP techniques that principally adopts the process of laminated forming [1, 2]. The bonding process is accomplished by applying heat and pressure by way of rolling a heated metal cylinder across a paper sheet, which has a thin layer of thermoplastic adhesive on the bottom side. The iterative process of bonding and laser cutting is repeated until the construction of the final layer is completed. Pak and Nisnevich [3] proposed a formula for a thermal model of LOM to analyze the heat transmission while the hot roller, i.e., the heated metal cylinder, hot