一、结构及特点动压球轴承系由钢球和轴杆两部分组成（见图1）。显然，采用整体加工的方法不仅工艺复杂且不经济，而理想的加工方法是用焊接。被焊材料（钢球和轴杆）均为轴承钢GCt15。对焊接接头性能的要求是：接头能承受的扭矩不小于20kgf－cm；钢球表面焊后保持粗糙度Ra－0 First, the structure and characteristics Dynamic pressure ball bearing by the ball and shaft composed of two parts (see Figure 1). Obviously, using the overall processing method is not only complex and uneconomical process, and the ideal method of processing is to use welding. Welding materials (steel ball and shaft) are bearing steel GCt15. The requirements of the performance of the welded joints are: joints can withstand the torque of not less than 20kgf-cm; ball surface roughness after welding Ra-0