摘要
硬脆材料具有硬度大、脆性高等特点,使用传统方法对硬脆材料加工效率低。电弧加工产生的电流密度远大于电火花加工产生的电流密度,因此电弧加工相比电火花加工具有更高的加工效率。针对硬脆材料的特点,设计了一种旋转超声振动辅助电弧加工机床。机床采取‘C’型结构,由机床工作台和数控系统组成。设计机床工作台主要由X-Y-Z三坐标轴、超声旋转主轴、伺服电机、大理石工作台、立柱和工作液槽构成。数控系统由开关控制器、运动控制卡、伺服驱动器、脉冲电源、超声发生器、电脑工控机组成。最后,利用研制的实验机床,对不同厚度弹簧合金钢进行小孔实验。将小孔显微图形通过矩阵实验室软件进行小孔边缘检测和圆度计算。实验结果表明:超声振动辅助下加工的小孔质量更好,边缘更加圆滑。
As far as the hard and brittle materials were concerned,the traditional methods of materials processing is usually very difficult to handle.The current density produced by electric arc machining is much greater than that of electrical discharge machining,so the electric arc machining has higher processing efficiency than electrical discharge machining.According to the characteristics of hard brittle materials,a kind of rotary ultrasonic vibration assisted electric arc processing machine tool was designed in this paper.The machine adopt ＂C＂type structure that is composed of machine table and numerical control system.The design of the machine tool is mainly composed of three axes X-Y-Z,ultrasonic rotating spindle,servo motor,marble table,pillar and working liquid trough.The numerical control system is mainly composed of the switch controller,motion control card,servo drive,pulse generator,ultrasonic generator,and industrial control computer.The small hole micro-graphs were studied by this device with different thickness of spring alloy steel.The small hole micro-graphs were analyzed by Mat-lab for small hole edge detection and roundness calculation and compared with each other.The results show that the cavities processed by ultrasonic vibration are better and the edges are smoother.
作者
徐明刚
刘贵珍
刘瑛
赵杰明
葛星
李旻瑄
Ming-gang XU;Gui-zhen LIU;Ying LIU;Jie-ming ZHAO;Xing GE;Min-xuan LI(North China University of Technology,Beijing 100144,China)
出处
《机床与液压》
北大核心
2018年第12期8-11,共4页
Machine Tool & Hydraulics
基金
derived from the natural science foundation of Beijing (No.3162011)
关键词
超声振动
电弧机床
小孔实验
Ultrasonic vibration
Electric arc machine
Small experiment
