鉄の塑性変形における表面粗さ波形の周波数分析

概要

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Roughening of the free surface of products is one of the most impportant problems in metal forming processes. In the present paper, spectrum analysis was carried out for the surface wave data of iron specimens during compression and tension. The maximum entropy method is adopted in the spectrum analysis using the personal computer. The effects of the applied strain and the grain diameter on the wavelength of the surface roughness were examined. The influence of the cut-off value in the surface roughness measurement was also studied. The results show that the primary wavelength of the surface roughness is independent of the strain, though the surface roughness and its standard deviation increase with the applied strain. A model is proposed to explain the experimental data, in which small waves of the surface roughness disappear during compression.
社団法人日本機械学会の論文
1991-04-25