曲拐传动多轴钻,由于其自身的优越性,得到日益广泛的应用。但常因设计不合理和制造不精确,在试车时就出现卡住转不动、扳弯拐头、撕裂拐板,强烈振动等现象。从设计的角度看,出现这种现象的原因之一,可能是由于拐板重心和动力拐孔心位置不合理,致使各曲拐所受之径向力呈周期性变化,并有较大的差别,以致所产生的径向变形差异亦大,破坏了平行四连杆机构的构成条件。当这种差异大到一定程度时就必然会 The crank drive multi-axis drilling, due to its own superiority, is increasingly used. However, often due to unreasonable design and manufacture of imprecise, stuck in the test when turning stuck, Guaitou, tearing the board, strong vibration and so on. From the design point of view, one of the reasons for this phenomenon may be due to the center of gravity and power of the turning center of the hole is unreasonable, resulting in the radial force suffered by each crank cyclically changed, and larger Difference, so that the resulting radial deformation is also large, undermining the composition of the parallel four-bar linkage conditions. When this difference reaches a certain level, it will inevitably be