板料成形几何尺寸光学检测精度评价的新方法研究  

New evaluation method of optical detection accuracy for sheet metal forming size

作　　者：张德海[1] 白代萍[1] 吴超[1] 王良文[1] 郭成[2] 

机构地区：[1]郑州轻工业学院机电工程学院,河南郑州450002 [2]西安交通大学机械工程学院,陕西西安710049

出　　处：《锻压技术》2012年第6期96-100,共5页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(50905012);郑州轻工业学院博士科研基金资助项目;郑州市科技攻关项目(10PTGG339-8);河南省科技攻关计划(122102210221);河南省高校科技创新团队支持计划资助项目(2012IRTSTHN013)

摘　　要：针对板料成形几何尺寸检测精度难以进行定量比较的问题,提出了一种板料成形几何尺寸光学检测精度评价的新方法。该方法基于统计学原理,结合三维光学测量技术的特点,引入统筹精度的概念来评价尺寸检测的精度,给出了统筹精度的计算方法和物理意义。采用该方法对某汽车后地板纵梁的回弹量检测精度进行评价。结果表明:后地板纵梁的三维空间几何量的统筹精度为0.512,x方向为0.059,y方向为0.363,z方向为0.539;其中z向的统筹精度数值大于三维空间值,三维空间量统筹精度的影响主要来自z向,y向次之,x向影响最小。In order to solve the accuracy quantitative comparison problem of the sheet metal forming parts, a kind of new method of optical detection accuracy evaluation for geometry size of sheet metal forming was presented, which was based on the statistical theory and combined with characteristics of 3D optical measuring technology. The concept of o- verall accuracy was introduced to evaluate the accuracy of size detection, its calculation method was given and physical meaning was explained. The springback accuracy of a car back carling was conducted to evaluate using this method. The results show that the overall accuracy of the carling of 3D space geometry accuracy is 0. 512, x direction is 0. 059, y direction is 0. 363 and z direction is 0. 539. Among them, the overall accuracy of z direction is greater than 3D space geometry. The influence of accuracy analysis of 3D space geometry values are mainly from z direction, on the second place from y direction and minimum from x direction.

关 键 词：板料成形 光学检测 精度评价 统筹精度 

分 类 号：TG335.5[金属学及工艺—金属压力加工]