机械设计说明书—CA6140车床经济型数控改装的设计.doc

PAGE II PAGE II 本科毕业设计（论文） 题目：CA6140车床经济型数控改装设计 CA6140普通车床数控经济型改造设计 摘要 本文主要阐述了将CA6140普通车床改成经济型数控车床，通过总体方案的设计，考虑机床的类型、传动方式和执行机构的选择等；针对车床的进给机构，计算出负载转矩和转动惯量，并根据计算结果分析各结构特点，确定横向传动链的方案，采用步进电机经减速机构和滚珠丝杠相连接机构，噪声低、可靠性高。由于它属于经济型数控机床，在保证一定加工精度前提下，应该简化机构、降低成本，因此，进给伺服系统采用步进电机开环控制系统。计算选择步进电机、齿轮副联轴器、滚珠丝杠螺母副等。其中步进电机的选择包括确定系统的脉冲当量和步距角的选择以及根据距频特性来校核点击能否满足要求；通过对最大工作载荷和最大动载荷的计算初步确定滚珠丝杠螺母副的型号，再校核它是否稳定合格。根据选型的数据绘制出滚珠丝杠螺母副图以及装配图。关键词：车床；横向进给系统；滚珠丝杠；自动刀架 CA6140Economical CNC lathe Transformation Design Abstract　　The article discusses the CA6140 lathe CNC lathe into the economy through overall program design, consider the type of machine, transmission methods and selection of implementing agencies; for lathe feed mechanism to calculate the load torque and moment of inertia and, based on the results of the structural characteristics, determine the horizontal transmission chain of the program, by the reduction gear by a stepping motor and ball screw connected to institutions, low noise, high reliability. Because it is economical CNC, machining accuracy in guaranteed under the premise of institutions should be simplified, lower cost, therefore, the servo system uses the open-loop stepper motor control system. Calculate selection stepper motor, gear pair coupling, the ball screw pair and so on. The choice of stepper motor which include the identification of the system pulse equivalent and the choice of step angle and the distance-frequency characteristics in accordance to check hits can meet the requirements; by the maximum working load and maximum dynamic load calculation to determine the initial ball screw pair model, then check the stability of its compliance. According to the data selection of a ball screw pair diagram drawing and assembly drawing.?Keywords: lathes ;izontal feed system; lscrew ;omatic knife PAGE PAGE III TOC \o 1-3 \h \u 目 录 TOC \o 1-3 \h \z \u 1 绪论 1 1.1课题背景 1 1.2机床改造的内容及意义 1 1.2.1研究意义 1 1.2.2主要研究内容及技术路线 2 1.3 机床的经济型数控化改造主要解决的