关键词: 激光辐照;聚合物微结构;融化温度;成型精度

Abstract: To realize high efficient and precise forming of polymer micro-structured parts, a new process method for polymer micro-structured is presented based on the laser melting, and the corresponding process is studied. The formation mechanism and theoretical model are discussed about laser melting forming of polymer, the relationship between polymer melting temperature and laser parameters is investigated by the method of theoretical analysis, and the polymer melting process is calculated with the way of numerical simulation, and theory and controlling method on melting process are proposed. A small experimental device is developed and the tests for typical polymer micro-structured parts with laser melting forming are carried out. By examining inaccuracy of products, the effects of process parameters on melting forming are investigated, such as mould temperature, process force. The experimental results show that process accuracy and replication of products are got well, the shape errors of formed parts are less than 1 μm, and the theoretical results of melting forming fit well with experiments data. It is demonstrated that the proposed process is a feasible and effective way to laser melting forming polymer micro-structured parts.

Key words: laser irradiating;polymer micro-structured;melting temperature;process precise