面向大型复杂产品装配的新型虚拟环境系统

摘要

In high speed milling at corner,cutting direction mutations and increase in radial cutting depth will lead to sharp increase in cutting force and machining vibration.To avoid this phenomenon,tool path is optimized by limiting radial depth at corner.First,traditional arc transition is optimized Then,Circular trochoid model has been used to remove the residuaLMathematical relationship based on radial depth of cutting constrain among tool radius,trochoid radius and tool step length have been analyzed to obtain the appropriate parameters for higher machining quality.Experiments showed that optimized tool paths could obtain weaker process vibration and superior machining quality.%针对大型复杂产品在装配时的工艺复杂、操作难度大、效率低等问题,利用虚拟现实技术,构建了一个新型沉浸式虚拟环境,用于产品的装配规划和过程培训.研究了系统的并行绘制、立体显示、几何校正、行走机构等关键技术.研制出立体视频生成器,使系统具有良好的显示实时性,并降低了成本.提出一种基于NURBS曲面的几何校正方法,实现虚拟场景在球幕上的正常显示.将该环境应用于卫星的装配规划过程中,由实验验证其可行性与实用性.