CAD系统与快速成形系统的直接集成方法

Direct integration of CAD and RP system

为避免CAD系统和快速成形系统之间采用三维模型的转换模型造成精度损失,研究了两者直接集成方案及相关技术。分析研究了CAD系统和快速成形系统的直接集成模式,指出两者集成的实时模式体现了先进制造技术的集成化发展趋势;研究了在CAD系统内部提取层片轮廓扫描数据的方法,以及实时模式下三维CAD模型对成形设备的直接驱动和运动控制;最后在聚苯乙烯泡沫材料成形机上以层片加工为例进行了试验。结果表明,CAD系统和快速成形系统之间可以避开三维CAD模型的STL格式转换等近似处理环节,从而在CAD系统内部直接驱动和控制成形设备进行加工,实现两者的直接集成。

The project and technique concerning direct integration of CAD and rapid prototyping(RP) system were researched to avoid the precision decreasing of the data transfer from CAD to RP system.The modes of integrating CAD and RP system directly were analyzed,among which the real-time mode embodies the integration character of the developing trend of the advanced manufacturing technology;then,the method of achieving the layer's contour scanning dada within CAD system and the technique of driving RP machine in real-time mode were researched;finally,tests were conducted on a polystyrene foam cutter machine with example of layer generation.Tests show that the approximate processing to 3D CAD model can be avoided during data transfer between CAD and RP,and the RP machine can be driven and controlled directly within CAD system by direct integration of CAD and RP.