航空模具复杂刻线的测量与重建

Measurement and Reconstruction of Complex Scribed Lines on Aviation Mould

针对航空制造企业对于模具工装的数字化需求,着重解决模具表面复杂刻线的测量和重建问题。利用光学跟踪下的手持接触式测量方法对模具刻线进行数据采集;根据测量点特性提出了数据点的归并、排序等管理办法和准则,使其组织形式与原始曲线轨迹相匹配并符合曲线重建的一般规律,在此基础上重建出工程需要的样条曲线。实验例证表明,所采用的方法简捷、有效,能够提高刻线重建效率。

To satisfy the demand of digitizing physical mould utilized in aviation manufacturing firms, this paper focuses on solving the issue of measurement and reconstruction of complicated lines scribed on mould. The data acquisition of scribed lines is carried out using a measurement method with hand contact probe and non-contact optical tracking sensor. Then, according to the characteristics of the unorganized measurement points, the methods and criterions for ordering of points are put forward, which are used to make the sequence matched with the trace of the original curve and conforms and meet the general law of the curve reconstruction, so that it is easy to fit the spline curves needed by engineering. Experiments show that the methods employed are simple, effective and can be used to improve the efficiency of the curve reconstruction.