本文介绍了以拐点角位置的推进器为基准,把液压缸行程平均分配在拐点角位置两侧的设计方法;建立了以拐点角和支臂转角为变量的平行误差函数;提出了两种修正设计法,实现了对误差的控制设计。采用修正设计法设计的机构,省去了打周边孔时对仰俯角机构的操作,又可扩大布置掏槽孔的纵向范围,乃至在全断面上钻出具有足够精度的平行炮孔。 In this paper, the design method of equally distributing the stroke of the hydraulic cylinder to both sides of the inflection point position based on the propeller of the inflection point position is introduced. The parallel error function with the inflection angle and the arm angle as variables is established. Two kinds of corrections Design method, to achieve the design of the error control. The mechanism designed by the modified design method eliminates the operation of the pitch-angle mechanism when playing the perimeter hole, and can extend the longitudinal range of the undercut hole and even drill parallel holes with sufficient accuracy on the full section.