中高速深孔静压磨头的设计

为提高深孔磨头的综合刚性问题，从四方面进行了优化设计：采用多油垫端面液体静压止推和双列径向液体静压轴承结构，减小主轴砂轮端挠度，提高抗振性；采用空心等强度主轴结构，提高固有振动频率；合理选择支承跨距，既保证磨头的回转精度，又使得固有振动频率较高；用配磨法很容易得到轴颈与轴瓦的最小使用间隙，保证磨头的回转精度和运动刚性．对改进后的磨头进行测试表明：其回转精度为0．004mm，工作转速达到6800r／min，用它磨削一批套筒深孔（口100mm×350mm），精度达到IT6．

Design of High Speed Static Pressure Grinding Heads for Deep Holes

High speed static pressure grinding heads are redesigned for deep holes from four aspects to make it more rigid by the use of multi-oil liquid, double-row hydrostatic bearing, high intensity spindle, proper support span and match grinding technology. The experiment result shows that the rotating accuracy of the grinding heads is 0.004 mm, and its rotating speed is 6 800 r/min. Its grinding accuracy can reach IT6 when deep holes （ ε 100 mm ×350 mm） are grinded.