The milling vibration affects machined surface quality and the size of the error, and has an important impact on the machining accuracy. This paper studies the different cutting parameters on cutting conditions on milling vibration during ball end milling Cr12MoV hardened steel assembled with different hardness steels, and use LMS. Test. Lab software to analyze the vibration signal on the condition of different spindle speed milling direction, axial depth of cut, and the vibration signal of transitional zone and the non-transitional zone are compared, providing the basis for a reasonable choice of milling parameters.
The contour method, a newly developed destructive technique, makes full use of advanced computer technology to simulate the distribution of residual stress in a weldment. It is simple to use and capable in measuring the welding residual stress in thick plates. According to surface displacement measurement, the inverse analysis of welding residual stress can be obtained by combining the finite element with 3D surface fitting technology. The results show that the welding residual stress could be precisely measured by the contour method with the help of such commercial softwares as Matlab, MSC.Marc, Excel and AutoCAD. In the research, the basic analyzing process of contour method was exhibited, which will lay foundations for its practical application.
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