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我厂在制造3.2m隧道掘井机中,有许多液压缸支座,都是球铰连接。要加工各种尺寸内球面,直径在φ100～φ250mm,因液压缸支座外形是很不规则的焊接件,如固定支承座外形大而内球面小,难于在车床上加工,只能在镗床上加工,为此设计了专用回转刀架在T68机床上加工内球面,效果很好,表面粗糙度Ra达1.6,精度7～8级。该回转刀架结构简单(见图),由主架、拔叉、刀架、轴等组成。主架用螺栓固定在平旋盘上,拨叉固定在平旋盘刀架上,利用T68机床平旋盘及平旋盘刀架两种运动即平旋盘作圆周运动,而平旋盘刀架在与平旋盘作圆周运动的同时,
I plant in the manufacture of 3.2m tunnel drilling machine, there are many hydraulic cylinder bearings are ball joints. To process a variety of sizes of the spherical surface, the diameter of φ100 ~ φ250mm, hydraulic cylinder bearing shape is very irregular welding parts, such as fixed bearing seat shape and small spherical, difficult to machine in the lathe, only in the boring machine Processing, designed for this purpose special rotary turret processing in the T68 machine inner sphere, the effect is very good, the surface roughness Ra of 1.6, accuracy of 7 to 8. The rotary turret structure is simple (see photo), by the main frame, fork, knife holder, shaft and other components. The main frame is fixed on the flat turntable by bolts, the fork is fixed on the flat turret turret, and the two movements of the flat turret and the flat turret are T68 rotary flat turret for circular motion, Rack with a rotating disk for circular motion at the same time,