一、前言机床,尤其是精密加工机床精度的优劣,应由二个方面加以评价:产品完工检查时所达到的精度。产品的内在质量(精度的保持性及使用寿命等)。前者是在厂内就反映出来的产品质量情况,而后者则往往要在用户使用一定时间后才能反映出来,所以常常没有前者那样得到应有的重视。 First, the foreword Machine tool, especially the accuracy of precision machining machine tool, should be evaluated in two aspects: the accuracy of the finished product inspection. The inherent quality of the product (accuracy of the retention and service life, etc.). The former is the quality of the products reflected in the factory, while the latter is often reflected in the user’s use of a certain period of time, so often the former did not get the attention it deserved.