摘要
针对采用常规检具测量冲压件回弹量存在精度低、费用高、周期长等问题,提出数字化回弹测量方法。研制了基于光栅投影的双目立体视觉测量装置,应用该装置采集获取实际冲压件产品的三维点云数据;采用三步法将点云数据与产品的CAD设计模型匹配对齐,计算点云相对于设计模型在最佳匹配位置的法向偏差量,从而获得回弹量数值。生产实际中的应用表明:所研制的测量装置和数字化回弹测量系统通用性强,能实现对复杂、大型冲压件快速、灵活、精确的三维回弹测量。
To make up the deficiencies such as low accuracy, high cost and long cycle in measuring the springback of stamping parts by using traditional tools, a digital method for measuring the spring- back is proposed in the paper. A binocular stereo vision measuring equipment based on the grating projection method is devised and 3D point cloud data of actual stamping parts is acquired by applying this equipment. The point cloud data and CAD design model are matched and aligned through three steps method. The value of the springback is obtained by calculating the normal deviation distance of point cloud relative to the design model in the best matching position. Practical applications show that the measuring equipment and the digital springback measurement system developed have characteristic of strong generality, and they are able to measure the springback of complex and large stamping parts fast, flexibly and accurately.
出处
《重庆理工大学学报（自然科学）》
CAS
2013年第4期45-49,共5页
Journal of Chongqing University of Technology：Natural Science
基金
福建省自然科学基金资助项目(2010J05116)
厦门科技计划项目(3502Z20113020)
中央高校基本科研业务费资助项目(JB-ZR1101)
关键词
回弹
立体视觉测量
点云
三步法
springback
stereo vision measuring
point cloud
three steps method
