BK7玻璃磨削加工平台构建与实验验证  

BK7 glass grinding platform construction and experimental verification

作　　者：封超 张金峰[2] 王保义 蒋忠贇 FENG Chao;ZHANG Jinfeng;WANG Baoyi;JIANG Zhongyun(Engineering Training Center,Shandong University of Science and Technology,Qingdao 266590,CHN;College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,CHN;Jinan Heavy Industry Group Co.,Ltd.,Jinan 250100,CHN)

机构地区：[1]山东科技大学工程实训中心,山东青岛266590 [2]山东科技大学机电工程学院,山东青岛266590 [3]济南重工集团有限公司,山东济南250100

出　　处：《制造技术与机床》2025年第1期63-68,共6页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金资助项目“复合材料镗杆高速切削系统非线性再生颤振与稳定性”(11672166);中国博士后科学基金项目“可植入多晶材料微构件介微观跨尺度铣削加工机理研究”(2016M5922165)。

摘　　要：磨削颤振是砂轮与工件间的强烈振动,它的存在降低了工件的表面质量,加速砂轮磨损,解决的关键是加工过程稳定。首先搭建磨削加工实验平台,并为了研究不同参数对加工稳定性的影响,定义了状态向量,通过Runge-Kutta法求解微分方程。其次以加工BK7玻璃为例,选取进给速度和砂轮长度2个参数的稳定和不稳定点进行实验。最后使用Matlab将采集到的数据生成时域信号图和功率谱图,对于进给速度,不稳定区域点的时域信号图和功率谱图峰值分别高达0.620 2 mm和0.128 5 dB,而稳定区域点的峰值仅为0.295 4 mm和0.009 9 dB;对于砂轮长度,不稳定区域点的时域信号图和功率谱图峰值分别高达2.011 9 mm和0.160 4 dB,而稳定区域点的峰值仅为0.225 8 mm和0.006 9 dB。分析时域信号图可以判断颤振情况,观察功率谱图可以发现能量的变化规律,二者结合有助于判定系统稳定状态,指导加工参数的合理选择,有效减少加工颤振。Grinding flutter was a strong vibration between the grinding wheel and the workpiece,which reduced the surface quality of the workpiece and accelerated the wear of the grinding wheel.The stability of machining process was used to solve this problem as the key.Firstly,the grinding experiment platform was built,and the state vector was defined,concurrently,the differential equation was solved by the Runge-Kutta method,which was studied to find the influence of different parameters on machining stability.Secondly,BK7 glass was regarded as an example,the points of stability or instability of feed speed and grinding wheel length was selected for experiments.Finally,Matlab was used to generate time domain signal diagram and power spectrum diagram with the collected data.For feed speed,the peak values of time domain signal diagram and power spectrum of unstable region points were as high as 0.6202 mm and 0.1285 dB respectively,while the peak values of stable region points were only 0.2954 mm and 0.0099 dB.For the length of grinding wheel,the time domain signal and power spectrum peaks of unstable region points were as high as 2.0119 mm and 0.1604 dB,respectively,while the peaks of stable region points were only 0.2258 mm and 0.0069 dB.The flutter condition can be judged by analyzing the time-domain signal diagram,and the energy change law can be found by observing the power spectrum diagram.Both of them were used to determine the stable state of the system,at the same time,guide the reasonable selection of machining parameters,and effectively reduce the machining flutter.

关 键 词：磨削 平台构建 进给速度 砂轮长度 实验验证 

分 类 号：TG580[金属学及工艺—金属切削加工及机床]