Ultra-fine Surface Production by Plastic Deformation

用不同表面粗糙度和不同润滑条件的冲头对工业纯铝带材进行压扁试验，结果表明，通过熨烫工艺可以获得超精细的表面。在模具一侧，当使用低粘度油时，经常发生磨损。当使用更高粘度的油时，金属表面成为摩擦表面（Ra=0.05 mum），这在本实验中是最好的，但不如模具表面。在冲床一侧，金属表面成为冲床表面的近复制品，并且可以通过更大的还原和更低粘度的油或干燥来提高复制程度。当施加冲头Ra=0.02 mum时，如果减少到20%，金属表面成为冲头的完整复制品。在干燥、Re=50%的熨烫条件下，使用SKD11的边缘表面光面Ra=0.004mum的冲头，也可以得到完整的冲头复制品。综上所述，在熨烫过程中，靠近冲头表面的金属表面可以通过复制机构进行修整。

Flattening tests on band workpieces of commercially pure aluminum with punches of differing surface roughnesses and widely different lubricating conditions as well as ironing reductions have shown that an extra-fine surface can be obtained by the ironing process.On the die side, galling often occurs when low viscosity oils are used. When higher viscosity oils are employed, the metal surface becomes a rubbed surface (Ra=0.05 mum) which is the best in this experiment but rather inferior to the die surface.On the punch side, the metal surface becomes a near-replica of the punch surface, and the replica degree can be elevated with larger reductions and lower viscosity oils or when dry. When applying the punch Ra=0.02 mum, if the reduction rises to 20%, the metal surface becomes a complete replica of the punch. And in the case of applying the punch Ra=0.004mum,which is marginal surface finish of SKD11, under ironing conditions of dry and Re=50%, a complete replica of the punch can also be obtained. In conclusion, the metal surface near the punch surface can be finished by a replica mechanism in the ironing process.