It is because the accumulated metal can be lumped in front of a discontinuous chip, a bue and a roundedcuttingedge of a tool hence the formation of scale on the occasions.
节状切屑、积屑瘤和切削刃钝圆之所以能导致鳞刺，完全是由于在它们的前方都能形成层积金属。
2
This machine is one of corollary equipment for making steel blade die cutting plate. It is used to trimming and cutting for die cutting ruler and creasing roundededge after modelling.