论文部分内容阅读
为了提高曲面零件的熔覆加工效率和质量,实现离线编程,根据激光熔覆的工艺特性对曲面零件进行路径规划。基于逆向工程对零件建模,根据模型提出一种基于切平面法的路径生成方法,通过分析熔覆道搭接率来确定切平面间的距离,利用有效加工离焦量得出轨迹上的插补点集,通过计算插补点在三角形面片上的位置确定法矢,并用偏置法计算出激光枪头的位置与姿态,最后对曲面的熔覆层形貌和组织性能进行分析。相较于一般的路径规划算法,该方法建立在满足激光熔覆工艺参数的前提下,综合考虑了轨迹间距、光斑大小等多种因素,提升了熔覆效率和质量,利于实现激光熔覆在曲面零件再制造领域的推广。
In order to improve the efficiency and quality of the cladding processing of the surface parts, offline programming is realized and the curved parts are planned according to the process characteristics of the laser cladding. Based on the reverse engineering of the part modeling, a method of path generation based on the tangent plane method is proposed according to the model. The distance between the tangent planes is determined by analyzing the overlap rate of cladding lanes. Make up the set of points, calculate the normal vector by calculating the position of the interpolation point on the triangular patch, and calculate the position and attitude of the laser tip with the offset method. Finally, the morphology and microstructure of the cladding are analyzed. Compared with the general path planning algorithm, the method is based on the premise of meeting the laser cladding process parameters, taking into account the trajectory spacing, spot size and other factors, to improve the cladding efficiency and quality, and help achieve the laser cladding Promotion of surface parts remanufacturing.