数控机床几何误差及其补偿方法研究

中文译文
数控机床几何误差及其补偿方法研究(中文3500字,英文2600字)
     提高机床精度有两种方法。一种是通过提高零件设计、制造和装配的水平来消除可能的误差源，称为误差防止法 (error prevention)。该方法一方面主要受到加工母机精度的制约，另一方面零件质量的提高导致加工成本膨胀，致使该方法的使用受到一定限制。另一种叫误差补偿法(error compensation)，通常通过修改机床的加工指令，对机床进行误差补偿，达到理想的运动轨迹，实现机床精度的软升级。研究表明，几何误差和由温度引起的误差约占机床总体误差的70%，其中几何误差相对稳定，易于进行误差补偿。对数控机床几何误差的补偿，可以提高整个机械工业的加工水平，对促进科学技术进步，提高我国国防能力，继而极大增强我国的综合国力都具有重大意义。 
1几何误差产生的原因：普遍认为数控机床的几何误差由以下几方面原因引起： 
1.1 机床的原始制造误差：是指由组成机床各部件工作表面的几何形状、表面质量、相互之间的位置误差所引起的机床运动误差，是数控机床几何误差产生的主要原因。

英文原文
CNC Machine Tool Geometric Error and its Compensation Method
Improve the precision machine tool there are two ways. One is by improving the part design, manufacture and assembly level to eliminate a possible source of error is called error Prevention Act (error prevention) .This method is the main subject on the one hand, the precision machine tool processing constraints, on the other hand, lead to improving the quality of parts processing costs of expansion, with the result that the use of this method are subject to certain restrictions.  Another called Error Compensation Act (error compensation), usually by modifying the machine's processing instructions for error compensation of machine tools, achieve the desired trajectory, precision machine tools to achieve a soft upgrade. Studies have shown that the geometric error and the error caused by the temperature of the overall error of machine tool about 70 percent, of which the geometric error is relatively stable, easy to carry out error compensation. Geometric error of CNC machine tools of compensation, you can raise the level of processing machinery industry,  the promotion of scientific  and technological  progress and  improving China' s  national defense capability, in turn greatly enhance China' s comprehensive national strength are of great significance.