CA6140改造设计

 目 录

 第一章 CA6140 普通机床改造成经济型数控车床的设计方案拟定 ·· 5
 §1.1 总体方案设计的 经济型数控机床进给伺服系统机械部分的设
计 ············· 9
 §2.1 脉冲当量的选择 ································································ 9 §2.2 滚珠丝杠
螺母副的设计，计算及选型 ·························· 10
 §2.2.1 滚珠丝杠螺母副的选型 ······································· 10 §2.2.2 计算及选
型 ···························································· 10 §2.3 滚 动 导 轨 的 计 算 和 选
型 ·················································· 12
 §2.3.1 选择滚动导轨的结构形式 ··································· 12 §2.3.2 滚动导轨预紧
方式的确定 ··································· 13 §2.3.3 滚动导轨的几何参数的确
定 ······························· 13
 第三章 微机数控系统硬件电路设计············································· 15
 §3.1 单片机数控系统硬件电路设计选择中央处理单元（CPU）的类
型 ··················· 16 §3.1.3 存储器扩展电路设计 ········································· 16
§3.1.4 I/0 口即输入/输出接口电路设计 ···················· 16 §3.2 MCS-51 系列单片
机 ························································· 16 §3.3 存 储 器 扩
展 ······································································ 21
 §3.3.1 存储器常用的芯片 ··············································· 21 §3.3.2 存储器的扩
展 ························································ 22 §3.4 I/O 接 口 电 路 及 辅 助 电
路 ······················································ 23 3

 第四章 数控机床控制软件简介······················································· 24
 §4.1 控制软件的组成及功能 ·················································· 24
 §4.2 数控机床控制程序的编程 ··············································· 26
 §4.2.1 第一象限直线插补（软环分配） ······················· 26
 §4.2.2 第一象限直线插补（硬环分配） ······················· 29
 结 论 ·································································································· 33 参考文
献 ···························································································· 34 致
谢 ··········································································· ······················· 35

 4

 第一章 CA6140 普通机床改造成经济型数控车床的设计方
 案拟定

 §1.1 总体方案设计的内容

 接到一个数控装置的设计任务以后，必须首先拟定总体方案，绘制系统总体框
图，才能决定各种设计参数和结构，然后再分机机械部分和电气部分进行设计计
算。现已机电一体化的典型产品—数控机床为例，分析总体方案拟定的内容和应