精密丝杆是螺纹磨床、座标镗床、精密车床和铲齿车床等精密机床的关键零件。由于它是一种精度高的细长零件,一般要用精密丝杆车床、螺纹磨床等来加工,而这些设备在一般工厂中是不具备的。所以当上述精密机床的精密丝杆磨损后,更换丝杆使机床重新获得精度,常常成为一个难题。为此,国内外发展了分段接长的组合式精密丝杆来解决此问题。采用分段丝杆(以后简称为丝杆段)可组合出不同长度的丝杆。由于把丝杆分成了短的丝杆段,所以使得加工、 Precision screw is thread grinder, jig boring machine, precision lathe and shovel lathe and other precision machine tools key components. Because it is a high-precision slender parts, the general use of precision screw lathe, thread grinder, etc. to process, and these devices in the general factory is not available. Therefore, when the above precision machine tool wear of the precision screw, the replacement of the screw to the machine to regain the accuracy, often become a problem. To this end, at home and abroad to develop a sectional length of the combined precision screw to solve this problem. The use of segmented screw (hereinafter referred to as the screw section) can be combined with different length of the screw. As a result of the screw into a short screw section, so make processing,