机械专业-车床数控化改造
改造的普通车床型号为CA6140，长度750毫米。数控改造主要包括传动系统的机械改造和数控装置的设计。由于对经济型数控机床的加工精度要求不高，为简化结构、降低成本，拟采用步进电机开环控制系统。通过控制纵、横进给系统，保证改造后的车床具有定位、直线插补、圆弧插补、暂停等功能。为实现机床所要求的分辨率，采用步进电机经齿轮减速再传动丝杠；为保证一定的传动精度和平稳性，尽量减小摩擦力，选用滚珠丝杠螺母副。
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