摘
由于目前国内的数控机床数量需求量大，达到300万台之巨，要进行全部翻新在实践，物质尚不具有足够的条件，为了达到的条件，为达到较高的精度，实现较好的经济性，对普通车床实行数控开环改造。
了解数控机床的概念，所谓数字控制是按照含有机床(刀具)运动信息程序所指定的顺序自动执行操作的过程。而计算机数控机床就是数控机床在计算机监控下进行工作。它的优点很多,可以在同一机床上一次装夹可完成多个操作，生产率显著提高等优点，但它的价格昂贵。由于我国现在使用的机床大多数为普通车床，自动化程度低,要更新现有机床需要很多资金。为了解决这个问题,也为了适应多品种中、小批量零件加工我们选择机床经济型数控改造。本次设计主要为纵向进给系统的设计，其中包括纵向进给系统改造方案的确定，各零部件的设计。
 
关键词  数控；车床；改造；

C6140 ordinary lathe of numerical control technology transformation 
Abstract
Due to the current number of domestic CNC machine tool demand to reach300 million units of the giant,to be totally refurbished at the time, the material is not yet sufficient condition,in order to achieve the conditions to achieve high accuracy to achieve better economic nature of the open-loop CNC lathe to implement reform.
Understand the concept of CNC machine tools,in accordance with the so-called digital control machine tools(tool)motion information in the order specified by the program automatically performs the operation.CNC machine tool sand CNC machine tools is to work under the supervision of the computer.It has many advantages,can be a fixture on the same machine can perform multiple operations,significantly improve productivity, etc., but it's expensive.Since China is now mostly used lathe machine,low degree of automation, to update existing machines need a lot of money.To solve this problem, but also to adapt to many varieties,small batch machining parts we choose economical CNC machine tools transformation.This design is mainly vertical feed system design, including vertical feed system transformation program to determine various parts of the design.
 
Keywords　 NC; lathe; transform;