被切削制件的螺距精度取决于丝杠的工作精度,影响其情况的因素有: 1)该机床所固有的,机床个别零件制造和相互位置的误差,以及某些零件在结构上的特殊性; 2)切制该零件的过程中所发生的。 机床精度检验时,第一类因素的影响,应该把下列各点当作是主要的: 1)丝杠螺距制造的精确度; The accuracy of the pitch of the machined part depends on the working accuracy of the lead screw. The factors that affect the condition are: 1) the inherent error of the machine tool, the manufacture and mutual position of the individual parts of the machine tool, and the particular structural features of some parts ; 2) what happens during the cutting of the part. When testing the accuracy of a machine tool, the effects of the first category of factors should be considered as follows: 1) the accuracy of lead screw manufacture;