We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Fundamental Studies on the Beginning Phenomena of Cutting (1st Report)
Summary
This study investigated the initial phase of metal cutting where no chips are formed because the tool is merely rubbing the workpiece surface, using low-speed orthogonal cutting with gradually increasing cut depth. The experiments identified the minimum depth of cut required to initiate chip formation and characterized the associated microplastic deformation phenomena.
In the beginning of cutting with abrasives or cutting tools, a phenomenon in which no chips are formed because the tool-edge is rubbed appears.In order to grasp the essentials of this phenomenon an experiment was carried out on the low speed orthogonal-cutting with a gradual increasing depth of cut using carbon steel and silicon steel as specimens, the observations were carried out on the cutting surface and the microplastic region by detecting dislocation etch pit of silicon steel.The experimental data shows that on the state of contact between tool and workpiece, in the rubbing region the tool-edge comes in contact with the surface roughness of workpiece, in the ploughing region the tool-edge comes fully in contact with the surface and in the cutting region it perfectly contacts with the bulk. On the observation of dislocation etch of pit silicon steel, it is recognized to occur dislocation by microyielding even in the rubbing region. The slip system in the rubbing latter period does not differ essentially from it in the ploughing region, it is the common slip system of silicon steel {110} <111>, but in the cutting region other slip system {112} <111> is observed.