三维光学检测冰箱门外壳成形回弹值获取研究  

Study on Springback Value Compute of Refrigerator Door Shell Using 3D Optical Measurement

作　　者：张德海[1] 白代萍[1] 杨勇[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：《机床与液压》2014年第3期85-89,161,共6页Machine Tool & Hydraulics

基　　金：国家自然科学基金项目(21206152);河南省基础与前沿技术研究项目(132300410181);河南省教育厅科学技术研究重点项目科技攻关计划(13A460372);河南省教育厅科学技术研究重点项目指导计划项目(13B460333);郑州市科技攻关项目(131PPTGG411-7);郑州轻工业学院校一般项目科研基金项目(2012XJJ012);郑州轻工业学院博士科研基金资助项目

摘　　要：针对冰箱门外壳因高塑性、小弹性模量和曲率半径大导致的成形回弹量难以精确预测和测量的问题,采用三维光学检测方法去获得门外壳的三维回弹量。该检测方法由摄影测量技术和计算机双目视觉技术组成,通过对实际零件测试获得点云数模,与设计的CAD数模进行基准对齐后,根据实际需要在任意位置作截面线,获得两个数模之间的差值,即回弹值,包含大小和角度两个方面。以某型号冰箱门外壳为研究对象进行了测试,以第一个截线读取结果为例,研究表明:回弹最大值为7.346 mm,最小值1.426 mm,最大回弹角为13.791°,最小回弹角1.739°。说明该方法可以实现回弹数值大小和回弹角度的检测。Aiming at the problem of forming springback quantity is difficult to accurately predict and measure because of the re-frigerator door shell is posed of higher plasticity,smaller modulus of elasticity and bigger radius of curvature,the three dimensional （3D）optical measurement method was adopted to compute springback value of the door shell. The measurement method was composed of photogrammetry and computer binocular vision technologies. The point cloud math model of the actual parts was obtained using the measurement method,and aligned with design CAD model. Afterwards the section line was obtained in random position according to actual needs. The obtained difference between both models was springback value including the two aspects of magnitude and angle field. A certain type of refrigerator door shell was measured as a studying object. By the example of reading result of No.1 section line, the study indicates that maximum value of springback is at 7.346 mm and minimum at 1.426 mm,the maximum springback angle val-ue at 13.791 ＆#176;and minimum springback angle at 1.739＆#176;. It shows that this method can achieve the measurement value of springback magnitude and angle.

关 键 词：检测 回弹 弹性模量 摄影测量 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TG806[自动化与计算机技术—计算机科学与技术]