船用凸轮外形轮廓线测量与建模的研究

Research on Measurement and Modeling Technology on Marine Cam

船用凸轮进行国产化和再升级的正向设计较困难,本文基于逆向工程技术,采用激光扫描仪测量并进行逆向设计。首先对实体零件采用激光扫描仪获取表面点云数据,利用逆向软件对测量数据进行点云合并、点云去噪、点云精简、建立坐标系、点云平面投影等处理,提出分层提取边界算法。将提取的边界点云由点到线到面的流程,构造三维实体模型。实践表明,该逆向设计能快速建立实体模型,基本可以满足凸轮运动要求,有一定实践指导意义。

It is difficult to design marine cam forward for localization and readjustment. Considering laser scanning technology, studied the reverse design in the paper. First obtain point cloud data by laser scanner, then merge data, re- duce noise points, reduce data, establish coordinate. Plane projection of data by reverse software, proposed algorithm to extract the boundary layer by layer. Reconstruct the model from curve to surface using the extract data. The practice shows that reverse design can build solid models rapidly, and comforms with the motion requirements of cam. It possesses direc- tive significance for practice.