毕业设计----CA6140横向进给系统及刀架的数控改造

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1、 CA6140 横向进给系统及刀架的数控改造 学 生： 学 号： 专 业：机械设计制造及其自动化 班 级： 指导教师： 摘 要 摘要 所谓数字控制机床是按照含有机床(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。纵向进给机构的改造：拆去原机床的溜板箱、光杠与丝杠以及安装座

2、,配上滚珠丝 杠及相应的安装装置，纵向驱动的步进电机及减速箱安装在车床的床尾,不占据丝杠空 间。横向进给机构的改造：拆除横向丝杠换上滚珠丝杠,由步进电机带动。总体设计方 案:CA6140 车床主轴转速部分保留圆机床的手动变速功能。车床的纵向和横向进给运动 采用步进电机驱动。最后,根据已知条件对纵向横向伺服进给机构进行设计与计算。 关键词:数控、车床、改造 Abtract ABSTRACT Numerical Control (NC) is any machining process in which the operations are executed automaticallu in se

3、quences as specified by the program that contains the information for the tool movement .When Numerical Control is performed under computer supervision, it is called Computer Numerical Control (CNC).CNC machines have many advantages over conventional machines. For example, there is a possibility lf

4、performing operations on the same machine in one setup and production is significantly increased. One of its disadvantages is that they are quite expensive. In our country conventional machine is used widely. So if the machines are replaced, there is going to need a large money. In order to agree with the development of our economy, we can reform the conventional machines. The reformation of the vertical mechanism: we demolish the current smooth leading, leading screw and installing