利用三坐标测量仪确定聚苯乙烯材料表面形态—外文翻译.doc

附录 Determining the surface form of polystyrene through the coordinate measurement machine D Aitchison and R Sulaiman* Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand Abstract: The market for foam materials has been growing rapidly throughout the world as they have a variety of uses. Some examples are in the automotives industries, food packaging industries, medical application, sports gears, home insulations and floatation in offshore drilling rigs, buoys and small boats. Since the uses of foam affects greatly the daily lives of humans, the need to have foams in different shapes requires speed in cutting and manufacture. This can only be done through computer aided cutting machines or automated cutting of foams. However, the speed of cutting will affect the surface . finish of the cut. Therefore, it is necessary to determine the surface form of the polystyrene to achieve quality results. This is an on-going research to produce a rapid-prototyping machine that cuts foam models. The . first phase of this research is to determine the surface form of polystyrene through the use of a coordinate measuring machine (CMM), after being cut with different types of wires, at different temperatures and cutting feed-rates. Keywords: polystyrene, surface form, hot-wire cutting 1 INTRODUCTION The market for foam material has been growing rapidly throughout the world. Foams can be categorized into two major types, namely flexible foams and rigid foams. The flexible foams are mainly used in furniture, transportation, bedding, carpet underlay, packaging, toys, sports application and shoes, as well as for vibration and sound attenuation. The rigid foams are usually used in building appliances, insulation agents, pipes, tanks, floatation and food and drink containers [1]. The reason why foams are used everywhere can be summarized as follows: 1. Foam is very inexpensive. 2. Foam is suitable for use indoors or outdoors. 3. Foam can be coated with