机械5

Φ320mm的数控车床总体设计及纵向进给设计 摘要 本次设计是对Φ320MM数控车床的设计。在这里主要包括:主传动系统的设计、纵向进给系统的设计、横向进给系统的设计。而我主要是针对纵向进给系统进行机械设计。这次设计对设计工作的基本技能的训练，提高了分析和解决工程技术问题的能力，并为进行一般机械的设计创造了一定条件。 数控设计主要传动系统的机械设计。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。通过控制横进给系统，保证设计后的车床具有定位、直线插补、圆弧插补、暂停等功能。为实现机床所要求的传动效率，采用步进电机经联轴器再传动丝杠；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。 关键词：车床，数控设计，联轴器，滚珠丝杠 Abstract This desig
n is about the commo
n Lathe Φ320MM tra
nsformatio
n of NC. Mai
n tasks are: the tra
nsformatio
n of the mai
n tra
nsmissio
n system, the tra
nsformatio
n of the vertical feedi
ng system, horizo
ntal feed system reform. While I was mai
nly aim at the lateral feedi
ng system mecha
nical tra
nsformatio
n. The graduatio
n project o
n the desig
n of the basic skills trai
ni
ng has improved the a
nalysis a
nd the ability to solve e
ngi
neeri
ng problems, a
nd create a certai
n co
nditio
n for ge
neral mecha
nical desig
n. NC tra
nsformatio
n is mai
nly a tra
nsformatio
n of mecha
nical drive system. Because of the eco
nomy less precisio
n CNC machi
ni
ng, it is order to simplify the structure a
nd reduce costs. By co
ntrolli
ng the cross-feed system, it e
nsures the modified lathe with positio
ni
ng, li
near i
nterpolatio
n, circular i
nterpolatio
n, a
nd pause. Required for the realizatio
n of the tra
nsmissio
n efficie
ncy of machi
ne tool, we should us a steppi
ng motor drive a
nd the
n screw through the coupli
ng. To e
nsure a certai
n degree of drivi
ng accuracy a
nd stability a
nd mi
nimize frictio
n, a ball screw pair is
needed. Keywords: lathe, NC Tra
nsformatio
n , Coupli
ng ,Ball Screw 目录 摘要1 Abstract 2 第1章数控机床发展概述5 1.1数控机床及其特点5 1.2数控机床的经济分析6 1.2数控机床的工艺范围及加工精度6 1.4数控机床的发展趋势7 第2章数控机床总体方案的制订及比较8 2.1总体方案比较与确定8 2.1主轴系统的方案确定9 2.2安装电动卡盘9 2.3换装自动回转刀架9 2.4螺纹编码器的安装方案9 2.5进给系统的与设计方案10 2.6尾座与设计方案10 第3章确定切削用量及选择刀具10 3.1科学选择数控刀具10 3.1.1选择数控刀具的原则10 3.1.2选择数控车削用刀具10 3.2设置刀点和换刀点11 3.3确定切削用量11 3.3.1确定主轴转速11 3.3.2确定进给速度11 3.3.3确定背吃刀量12 第4章纵向进给机构的设计12 第5章数控系统的选择19 5.1数控系统基本硬件组成19 5.2单片机控制系统的设计21 结论23 参考文献24 致谢26