The high speed milling experiments are performed for hardened H13 die steel by using coated ball end milling cutter, the
experiment was design for testing distribution properties of the residual stress in HSM. And the residual stress of the
work-piece surface on the feed and cross feed direction are measured by the X-ray stress analyzer (X-stress 3000), and
the distribution characteristics of residual stress is analyzed. The result shows that the residual stress presents gradient
distribution on feed direction, and furthermore, the three-dimensional surface micro topography has been observed by the
WykoNT9300, it shows that the micro topography has no close relation with the residual stress. In addition, the
cumulative effect is discussed for explaining the phenomena. It could be one explanation for the residual stress gradient
on the machined surface on mechanism.
The residual stress is measured by choosing 8 kinds orientations on cutting the H13 dies steel on the HSM in the experiment of this paper. The measured data shows on that the residual stress exists periodicity for the different rake angle (β) and side rake angle (θ) parameters, further study find that the cutting tool orientations have closed relationship with the residual stresses, and for the original of the machined residual stress on the surface from the cutting force and the axial force, it can be gained the simply model of tool-workpiece force, using the model it can be deduced the residual stress model, which is feasible to calculate the size of residual stress. And for almost all the measured residual stresses are compressed stress, the compressed stress size and the direction could be confirmed by the input data for the H13 on
HSM. As the result, the residual stress model is the key for optimization of rake angle (β) and side rake angle (θ) in
theory, using the theory the more cutting mechanism can be expressed.
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