A theory for the analysis of the arbitrarily-shaped helicalgroove structure is obtained by means of an approximate field-theory.
采用近似场论的方法，获得了一种分析任意槽形螺旋槽结构的普遍理论。
2
Usually, there exist undercutting phenomena in helicalgroove milling process, which affect the accuracy and geometrical shape greatly.
螺旋槽成形铣削时普遍存在根切现象，在很大程度上影响到加工精度和几何形状。
3
As indicated in the section on simple machines, a screw ACTS with a wedging action and consists of a circular cylinder (or truncated cone) with a helicalgroove in it.