摘要
滚抛磨块的运动速度是影响滚磨光整加工效果的重要因素。为解决滚抛磨块流场速度测试中存在的无法直接获得速度、测试过程对流场存在干扰、只能实现单点测试等问题,提出滚抛磨块三维速度场的双相机测试方法。搭建滚抛磨块三维速度场测试系统,通过位移测试实验验证测试系统的准确性与稳定性,并对立式振动滚磨光整加工设备进行滚抛磨块三维速度场测试实验。结果表明:位移实验测得的位移值与实际施加的位移值基本一致,X方向位移平均误差的绝对值<0.10 mm,Z方向位移平均误差的绝对值<0.15 mm,且测得的滚抛磨块三维速度场运动规律与实际规律基本一致。
Objectives:The motion speed of the rolling and polishing block is one of the key factors affecting the overall machining effect of rolling polishing.However,the traditional method for measuring the flow velocity of rolling and polishing blocks has many shortcomings,especially in terms of testing accuracy and efficiency.The traditional method often cannot directly obtain velocity data and is limited by single-point testing,which cannot comprehensively and dynamically reflect the motion trajectory of the rolling and polishing block flow field.In addition,the interference of the measurement process with the flow field of the rolling and polishing block is also a factor that cannot be ignored in the testing process of the traditional method,and it significantly affects the accuracy of the test results.Therefore,a dualcamera testing method for the three-dimensional velocity field of the rolling and polishing block is proposed,aiming to achieve accurate measurement of the motion velocity of the rolling polishing block through this method and further improve the effect and accuracy of rolling polishing machining.Methods:Two Dushen industrial cameras are used to synchronously capture motion images of the rolling polishing block from different perspectives,and then the motion trajectory of the rolling polishing block in three-dimensional space is constructed using disparity calculation and feature point tracking algorithms.The specific process is as follows:First,the position changes of the surface feature points of the rolling grinding block are extracted through the image matching algorithm.Then,by using the calibration parameters of the camera(including internal parameters,external parameters,and distortion coefficients),the two-dimensional image coordinates are mapped to the three-dimensional coordinate system to complete the calculation of the velocity vector.Next,a three-dimensional velocity field test system for the rolling and polishing grinding block are established,and the accuracy and stability of the system are be verified through displacement test experiments.The three-dimensional velocity field test of the vertical vibration roller grinding and finishing processing equipment is conducted on the roller grinding blocks to verify its application feasibility and stability in actual processing,and to further evaluate its performance and advantages in roller grinding and finishing processing.Results:The displacement test results show that the displacement values measured by the testing system are very close to the actual applied displacement values.In the X direction,the absolute value of the average measurement error is less than 0.10 mm.In the Z direction,the absolute value of the average measurement error is less than 0.15 mm.The three-dimensional velocity field test experiment of the rolling polishing block reveals the motion law of the flow field of the rolling polishing block.The measured three-dimensional velocity field of the rolling polishing block is basically consistent with its actual motion law,verifying the effectiveness and accuracy of this testing method in measuring the velocity of the rolling polishing block.Moreover,it can accurately capture the motion trajectory without interfering with the flow field,providing reliable motion analysis data for the grinding and finishing process.Conclusions:The proposed dual camera testing method for the three-dimensional velocity field of rolling polishing blocks provides a new technical approach for measuring the three-dimensional velocity field of rolling polishing blocks.This method can accurately and stably obtain the three-dimensional velocity field of rolling polishing blocks and reveal their motion laws,providing an effective tool for further optimizing the rolling polishing process.This testing system is expected to play a greater role in high-precision motion analysis and machining optimization,providing assistance for other similar complex flow field tests.
作者
田春越
丁俊飞
李文辉
李秀红
杨胜强
TIAN Chunyue;DING Junfei;LI Wenhui;LI Xiuhong;YANG Shengqiang(College of Mechanical and Transportation Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Aeronautics and Astronautics,Taiyuan University of Technology,Jinzhong 030600,Shanxi,China;Key Laboratory of Precision Machining in Shanxi Province,Taiyuan University of Technology,Taiyuan 030024,China;College of Mechanical Engineering,Tianjin University of Science and Technology,Tianjin 300457,China)
出处
《金刚石与磨料磨具工程》
北大核心
2025年第4期542-550,共9页
Diamond & Abrasives Engineering
基金
国家自然科学基金(51975399,52075362,51875389)
中央引导地方科技发展资金(YDZJSX2022A020,YDZJSX2022B004)。
关键词
滚磨光整加工
滚抛磨块
双相机测速
流场三维速度
rolling and polishing processing
rolling and polishing block
dual camera speed measurement
3D velocity of the flow field
