高速圧縮加工における銅合金薄板の表面あれ

概要

論文の詳細を見る
An electric connector is produced by press working with a progressive die. The surface of the workpiece is roughened by the compression process, which is harmful to the subsequent gold plating. The behaviour of the surface roughening of Cu-Ni-Sn alloy with 0.645 mm thickness was examined through the changes in the oil viscosity, the velocity and the grain size of the workpiece with a drop tester and conventional presses. The roughening was caused by the squeeze effect of trapped oil between the surfaces. The roughness increased with increases in the reduction rate of the thickness, the velocity and the grain size. After having the minimum value at 30 cSt, the roughness generally increased with the oil viscosity. The roughening behaviour by the drop tester was almost the same as that on the free surface appeared by the tensile test.
社団法人日本機械学会の論文
1991-10-25