After the metal of the cutting layer has been sheared and slipped, it should be said that the deformation is basically over

After the metal of the cutting layer is sheared and slipped. It should be said that the deformation is basically over, but the bottom layer of the chip (the layer in contact with the rake surface) is further squeezed and rubbed by the rake surface during the flow of the rake surface. The second deformation. Of course, this second deformation is concentrated in the very thin layer of metal at the bottom of the chip. And the fiberization direction of this layer of metal is parallel to the rake face. This is because the bottom metal of the chip must flow along the rake face on the one hand, and the other On the one hand, it will be expanded by the squeeze friction of the rake face.

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