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滑切理论早先由手动直线刃无隙(或等隙)型发展成机动曲线刃无隙(或等隙)型。以上两种无隙型都属于母线级滑切。之后,人们为了保留易制的直线刃,放弃了无隙(或等隙)要求,发展成机动直线刃不等隙型。这种不等隙型属于准母线级滑切。为了探索既保留易制的直线刃,又能获得无隙(或等隙)型,即回复到母线级滑切,本文作者提出了新的设计思想,最终实现了滑切理论的重新统一。同时对国际上某些学术界所作的试验研究也作了相应的评价。
Slip-cutting theory was previously developed by a manual linear blade gapless (or equal gap) type into a curved (edgeless) gap type (or gap). The above two kinds of gapless type belong to the bus-level sliding cut. Later, in order to retain the easy-to-make straight-edged blade, people abandoned the requirement of no gap (or equal gap) and developed into a straight blade with no gap. This kind of unequal gap belongs to the quasi-bus-level slip cut. In order to explore a straight-edged blade that retains an easy-to-make system and obtain a gap-free (or equal-gap) shape, that is, back to bus-level slip cutting, the authors propose a new design concept and finally achieve the reunification of the slip-shear theory. At the same time, some researches done by some scholars in the world are also appraised accordingly.