论文部分内容阅读
概况精密丝杆是高精度机床中最关键的零件之一,加工工艺复杂,我厂自五八年生产精密磨床以来,为了克服整体淬硬丝杆在热处理淬硬后的尺寸伸长而造成螺距超差,丝杆热处理一直采用光杆淬硬后再用螺纹磨床直接磨出螺纹的加工方法。精密丝杆使用材料,开始用CrWMn制造。CrWMn钢具有一定的优点,如淬透性和淬硬性好,耐磨性好。也有一些缺点:如碳化物网络和偏析严重;球化处理困难,磨削裂纹倾向很大,钢材表面裂纹严
Overview Precision screw is one of the most critical parts of high-precision machine tools, complex processing technology, our factory since the production of precision grinding machines in 1988, in order to overcome the overall hardened screw hardened in the heat treatment after the size of the elongation caused by the pitch Ultra-poor, screw rod heat treatment has been polished rod polished with thread grinding directly after the thread grinding method. Precision screw material used, began to use CrWMn manufacturing. CrWMn steel has certain advantages, such as hardenability and hardenability, good wear resistance. There are also some disadvantages: severe carbides such as carbide network and segregation; difficult balling treatment, great tendency of grinding cracks, cracked steel surface