切削过程动态观测的教学实验系统开发

为了提高"机械制造技术基础"课程的教学效果,开发了切削过程动态观察的教学实验系统。实验在铣床上进行,将刀具固定在滑枕上,板状工件固定在工作台上,用低速刨削方式,用CCD显微摄像机从侧面拍摄,在显示器上可观测到二维切削过程。用变频器对进给电机进行无极调速来改变工作台移动速度,给出了机床电气线路改造方案、变频器使用方法。还给出了CCD显微摄像机的组成。实验中能直观地看到金属切削过程,也能测量刀具前角、后角,还能测量剪切角、切削和切屑厚度,计算变形系数。切削过程动态观察实验操作简单,教学效果明显,学生反映较好,有较大推广价值。

Development of Teaching Experiment System for Dynamically Observing and Measuring to Cutting Process

A teaching experiment is developed to improve the teaching performance of the fundamentals of mechanical manufacturing technology course.The experiment is carried out on a column milling machine tool;the cutting tool was fixed on the overarm;the board type workpiece was fixed on the worktable.Under the planing fashion at low cutting speed,a CCD microcamera is used to screen from tool orthognoal plane and the orthognoal cutting process can be observed on the display.A transducer was applied to change the spe...