MJ—50型数控车床进给传动系统设计
摘 要
伺服进给系统是数控机床的重要组成部分，对机床整体性能有着决定性的影响。越来越多的研究人员在进给伺服系统的研究中投入大量精力。研究设计进给系统的结构，并进行误差计算和精度分析，有利于深入了解进给系统的原理和设计方法，进而探求可能的优化设计。
本次设计了以滚珠丝杠为核心元件的MJ-50数控车床工作台进给传动系统。MJ-50数控车床进给传动系统主要由电动机、滚珠丝杠、工作台、联轴器、导轨组成。通过对数控车床进给传动系统的设计理论，首先进行了伺服进给传动系统的总体方案设计以及机床精度的选择；其次是沿Z轴（纵向）进给和沿X轴（横向）进给传动系统设计的滚珠丝杠的计算与选择、滚珠丝杠支承轴承的选择、通过计算选择进给传动系统的其他相关元器件、对传动系统的刚度、惯量匹配等进行了校核验算；再次通过计算来选择进给传动系统的伺服电动机以及联轴器，最后进行导轨的选择。证明计算得出的结果较好得满足了提出的设计要求，利用Auto CAD软件绘制了相关的装配图。
 
关键词：数控车床, 进给伺服系统, 滚珠丝杠

The Design drives System of CNC Lathes
Abstract
Servo system is an important part of NC machine tools, having adecisive influence on the overall performance of machine tool. More and more researchers devote a great deal of energy in the study of servo system. Studying on design of feeding system structure,  error calculation and precision analysis are helpful for understanding the feed system principle and design method, then exploring possible optimization design.
This design of a ball screw pair for the MJ-50 CNC lathe cross slide table of the core components of the feed drive system. MJ-50 CNC lathe feed drive system motors, ball screws, cross table, couplings, rail. CNC lathe feed drive system design theory, the overall program design and the choice of machine precision servo feed drive system; followed along the Z axis (vertical) to feed along the X axis (horizontal) feed drive calculation and selection of the system design of the ball screw nut, ball screw support bearings choice, selected by calculating the other components of the feed drive system, the stiffness of the drive system inertia matching checking checking; again calculation to select the feed drive system, servo motor coupling, the final choice of rail. Better prove that the calculated results must meet the requirements of the proposed design. Using the Auto CAD software rendering the related parts graph and assembly drawing. paper .
 
Key words: CNC lathes, Servo System, Ball screw pair