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介绍了立式螺旋开沟机中圆锥螺旋叶片的绘制与展开方法;对等升角变螺距的圆锥螺旋线的形成做了理论上的分析和说明;对圆锥螺旋叶片曲面做了近似展开。
The drawing and unfolding methods of the conical helical blade in the vertical spiral trenching machine are introduced. The formation of the conical helix with the variable pitch is analyzed and explained theoretically. The curved surface of the conical helical blade is expanded.