激光衍射在拉丝模孔型测量中的研究  

Research on laser diffraction in pass measurement of wire drawing dies

作　　者：杨萍[1] 张玉杰[1] 

机构地区：[1]陕西科技大学电气与信息工程学院,陕西西安710021

出　　处：《激光与红外》2017年第2期150-153,共4页Laser & Infrared

基　　金：陕西省科技计划项目(No.2014K07-17)资助

摘　　要：随着拉丝模孔径越来越小型化,常用的拉丝模内孔参数测量方法已经不能满足测量的要求。本文将旋转测量法和激光衍射相结合,实现了微小孔孔型参数的高精度测量。测量过程中,通过控制步进电机不断旋转拉丝模中心轴而产生不同的衍射效果,在CCD上分别采样圆孔和椭圆孔衍射图像,利用衍射图像和孔型参数之间的函数关系实现拉丝模各参数的测量。最后通过测试得出各参数的测量误差约为1%,实验结果表明该系统可靠性好、精度高。As the aperture of wire drawing die is becoming smaller and smaller,the parameter measurement of the common wire drawing die inner hole can＇t meet the requirement.The high precision measurement of micro aperture pass was realized by combining the rotation measurement and laser diffraction.In the measurement process,center shaft of drawing die was continuously rotated by controlling of stepper motor,which produced different diffraction effects.The diffraction images with round or elliptical hole were sampled respectively on the CCD.The pass parame-ters of drawing die were measured through the function relationship between diffraction images and pass parameters. Finally,the measurement error of about 1% was obtained.The results show that the system has good reliability and high precision.

关 键 词：拉丝模具 孔型 激光衍射 旋转法 微小孔 

分 类 号：TH741[机械工程—光学工程]