Inhomogeneity of Thickness of Sheet in Different Forming Path
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摘要: 采用低碳鋼板K08Al、08Al研究了單向拉伸、平面應變、等雙向拉伸、單向拉伸——等雙向拉伸及等雙向拉伸——單向拉伸5種變形路徑中的表面粗糙度Rz、Rm值隨變形量的變化。同時,對初始板厚不均勻度fo以及在不同變形路徑中板厚不均勻度隨變形的發展進行了測定和分析。結果表明:在各變形路徑中,隨著變形量的增加,表面粗糙度Rz、Rm值呈線性增加,而板厚不均勻度fR值則顯著下降。Abstract: By making use of low-carbon steel K08Al, 08Al, the change of surface roughness Rz,Rm value according to the forming paths of uniaxial, plane, biaxial, uniaxial-biaxial and biaxial-uniaxial deformation models was investigated. The initial value fo and the change of inhomogeneity of thickness fR with strain were measured. The results show that the surface roughness Rz, Rm increase linearly with the increase of strain while inhomogeneity of thickness fR decrease in each forming path.
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Key words:
- sheet metals /
- cold deformation /
- surface roughness /
- principal strain /
- uniformity /
- forming path
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