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苏联姊妹河工具厂制成了一台用于同时铣削麻花钻头或专用钻头的两个钻背和钻沟的CN—088型半自动双钻沟铣床。该机床有两个滑套式铣头,滑套主轴上装两把可互换的盘铣刀。因而简化了机床的运动链及其调整,并且提高了劳动生产率、机床的可靠性和加工精度。机床所有的主要部件都装在一个有垂直导轨的主柱上,在导轨间装有传动丝杠7(图a)。主轴箱14的油马达13通过蜗轮付与固定不动的丝杠上的螺母相联。在机床的运动链中,交换齿轮组6用于调整钻头18的螺旋沟倾角。钻头
Sister River Tool Plant in the Soviet Union made a CN-088 semi-automatic double-boring mill for drilling two drill backs and trenches simultaneously for milling twist drills or special drills. The machine has two sliding sleeve milling head, sliding sleeve spindle two interchangeable disc cutter. As a result, the machine chain and its adjustment are simplified, and labor productivity, machine tool reliability and machining accuracy are increased. All the main components of the machine are mounted on a main column with vertical rails with a drive screw 7 (Figure a). The oil motor 13 of the headstock 14 is connected to the nut on the stationary lead screw via a worm gear. In the kinematic chain of the machine, the exchange gear set 6 is used to adjust the helical groove inclination of the drill bit 18. drill