“腰圆孔钻铣动力头”用于加工2.5吨打桩机桩架“支腿”的四只腰圆孔。“支腿”是桩架中的一个较大零件,自重500公斤。以往腰圆孔需在龙门铣床上加工,不仅耗电量大,对中间工序的周转和装卸都较困难,在铣削时各孔还须进行校正。因此,每加工四只腰圆孔,前后共需四个小时才能完成。为了改变这种状态,我们自制了该动力头(见附图)。动力头自重100公斤,电机功率为1.1瓩,能完成钻铣两道工序。经过使用证明,动力头 “Diamond round hole drilling and milling power head” is used to process four waist round holes for the “stand” of a 2.5-ton pile driver pile frame. The “leg” is a larger part of the pile frame and weighs 500 kilograms. In the past, the waist hole was processed on a gantry milling machine, which not only had a large power consumption, but also had difficulties in handling and loading and unloading of the intermediate process, and the holes had to be corrected during milling. Therefore, it takes a total of four hours before and after the processing of four round holes. In order to change this state, we created the power head (see the attached figure). The power head has a weight of 100 kilograms and a motor power of 1.1 turns. It can perform two drilling and milling operations. After proof of use, power head