卷筒式拉拔机拔管时的残余应力
DETERMINATION OF RESIDUAL STRESS EXISTING IN PIPE BEING DRAWN ON MANDREL DRAWING MILL
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摘要: 用达维坚科夫法不仅可以测定卷筒式拉拔机拔管时钢管的纵向残余应力,而且还可测定弯曲过程中所产生的残余应力。残余应力的符号和大小在很大程度上取决于钢管在拔制工具中的初始变形率。Abstract: The use of Davidenkov method makes it possible to determine the longitudinal residual stress existing in pipe being drawn on a mandrel drawing mill and the residual stress developed during pipe beading as well. The magnitude and symbol of the residual stress greatly depends on the initial deformation rate of the pipe under drawing with the working tools.