推荐回答(3个)
数控加工时以程序段为单位,由系统程序逐段进行处理,不仅将刀位数据还将加工速度F代码及其他辅助代码(s代码表示主轴转速,T代码表示刀具号,M代码表示辅助功能指令)均按语法规则解释成计算机所能认可的数据形式,并以一定的格式存放在内存专用区 间。此外,对刀具补偿(长度与半径补偿)作处理,对进给速度(合成速度分解成沿各坐标的分速度以及自动增减速等)做处理,完成加工中的插补运算(由主CPU担任),数据由存储区间调入时,依靠控制总线通过地址总线取址并将数据沿数据总线输入CPU运算,结果仍沿总线返回,分别送至相关输出接口。输出信号也要通过一系列电路处理(分配、中断和缓冲),才能使伺服电机进给,使主轴按转速回转或停止。CRT显示出程序执行过程,并输出位置环与速度环的反馈信号经总线往返后由CPU进一步随机处理的结果。全部过程均在时钟频率的统一控制下,有条不紊地进行工作
数控加工的基本原理:
数控加工是现代先进制造技术的核心。随着科学技术的发展,机械产品的结构越来越复杂,对产品的性能、精度和生产效率的要求越来越高,并且更新换代频繁。为了缩短生产周期,满足市场上不断变化的需求,机械制造业正经历着从大批量到小批量及单件生产的转变过程,而传统的制造手段已满足不了当前技术的发展和市场经济的要求,数控技术的应用和发展,有效的解决了上述问题,它使传统的制造方式发生了根本的转变。 现在数控技术已成为制造业实现自动化、柔性化、集成化生产的基础技术,都是建立在数控技术之上。
数控加工是指,由控制系统发出指令使刀具作符合要求的各种运动,以数字和字母形式表示工件的形状和尺寸等技术要求和加工工艺要求进行的加工。它泛指在数控机床上进行零件加工的工艺过程。
数控加工,是指在数控机床上进行零件加工的一种工艺方法,数控机床加工与传统机床加工的工艺规程从总体上说是一致的,但也发生了明显的变化。用数字信息控制零件和刀具位移的机械加工方法。它是解决零件品种多变、批量小、形状复杂、精度高等问题和实现高效化和自动化加工的有效途径。
参考资料http://baike.baidu.com/view/719097.htm#1
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