基于激光三角法的辊弯成形回弹测量与评价  

Measurement and evaluation on springback in roll forming based on laser triangulation

作　　者：韩飞 尚伟勇 Han Fei;Shang Weiyong(School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100043,China)

机构地区：[1]北方工业大学机械与材料工程学院,北京100043

出　　处：《锻压技术》2023年第1期229-236,共8页Forging & Stamping Technology

基　　金：北京市自然科学基金-市教委联合资助项目(KZ201910009011);北京市属高校高水平教师队伍建设长城学者培养计划(CIT&TCD20190306);北京市教委基本科研业务费项目(110052972027/024);北方工业大学毓杰团队支持计划(107051360021XN083/001);国家自然科学基金资助项目(51074204)。

摘　　要：针对辊弯成形件目前存在的回弹量难以精确测量,以及无法全面统计成形实际误差等问题,提出一种辊弯成形件回弹量的视觉测量方法。运用逆向工程技术的方法,对成形后的零件进行逆向设计,并与原始点进行对比,从而得到板材的相关数据。该方法利用激光三角法测量装置,来获取辊弯成形件的点云数据,然后利用Geomagic Qualify软件对点云数据进行处理。将点云数据与产品设计标准CAD模型匹配对齐,计算点云相对于设计模型在最佳匹配位置的法向偏差值,从而获得回弹量数值。此方法能够准确地得出同一成形件不同截面的回弹量,为后续辊弯成形闭环矫正系统提供实时参考数据。For the problems that the springback amount of roll-formed parts was difficult to be accurately measured and the actual error in forming could not be fully counted, a visual measurement method for springback amount of roll-formed parts was proposed. Then, using the method of reverse engineering technology, the formed part was reverse designed and compared with the original points so as to obtain the relevant data of sheet metal. The method used the laser triangulation measurement device to obtain the point cloud data of roll-formed parts, and then used software Geomagic Qualify to process the point cloud data. The point cloud data was matched and aligned with the product design standard CAD model, and the normal deviation value of the point cloud relative to the design model at the best matching position was calculated to obtain the values of springback amount. Thus, this method can accurately obtain the springback amount of different sections in the same formed part and provide the real-time reference data for subsequent roll forming closed-loop correction system.

关 键 词：机器视觉 激光三角法 辊弯成形 点云处理 回弹测量 

分 类 号：TB92[一般工业技术—计量学] TH712[机械工程—测试计量技术及仪器]