小型磁力研磨机床数控系统设计  

Design of numerical control system for small magnetic abrasive finishing machine

作　　者：鲁新生 王炅[1] LU Xinsheng;WANG Jiong(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,CHN)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《制造技术与机床》2022年第3期86-91,共6页Manufacturing Technology & Machine Tool

摘　　要：磁力研磨作为一种新兴的表面光整技术,在细长管内壁研磨方面有着独特的优势,但目前市场上磁力研磨专用的数控机床设备较少。针对传统数控系统在小型机床上应用的缺陷,基于STM32+FreeRTOS实时操作系统设计了数控机床的嵌入式软硬件,建立了三层拓扑结构的软件系统。对主轴转速伺服控制进行了研究,通过系统辨识建立主轴数学模型,基于Ziegler-Nichols方法整定PID参数。以活检针为例进行了实际的磨削实验,试验结果表明,该机床磨削过程稳定、加工精度高。Magnetic abrasive finishing,as a new surface finishing technology,has unique advantages in lapping the inner wall of slender tubes,but there are few CNC machine tools for magnetic lapping in the market.Aiming at the defects of traditional numerical control system applied to small machine tools,this paper designs the embedded software and hardware of numerical control machine tools based on STM32+FreeRTOS real-time operating system,and establishes a three-layer topological software system.The spindle speed servo control was studied,the spindle mathematical model was established through system identification,and PID parameters were set based on Ziegler-Nichols method.Taking biopsy needle as an example,a practical grinding experiment was carried out.The experimental results show that the grinding process of the machine is stable and the machining accuracy is high.

关 键 词：磁力研磨 小型机床 嵌入式 PID控制 ZIEGLER-NICHOLS 

分 类 号：TG519.1[金属学及工艺—金属切削加工及机床]