一、问题的提出联合收割机、脱粒机和清粮机等,常用搅龙(螺旋推运器)输送谷粒和杂余。搅龙轴上的螺旋叶片是由若干个开口圆环根据螺旋方向焊接在一起,然后穿在轴上冷拉成形的。能否使冷拉成形的螺旋叶片符合搅龙的内径、外径和导程的要求,取决于螺旋叶片近似展开下料圆环的内径、外径尺寸计算结果是否正确。 First, the issue raised Combine harvesters, threshers and grain machines, commonly used auger (auger) to transport grain and debris. The auger screw on the auger shaft is composed of several open rings welded together according to the helical direction and then cold drawn on the shaft. Whether the cold-drawn helical blades conform to the inner diameter, outer diameter and lead of the auger depends on the inner diameter of the unloader ring of the helical blade and whether the calculation of the outer diameter is correct.