Motion-Controlled Precise Stamping for Microtexturing onto Aluminum Sheet

摘要: Mass production of heat radiation devices requires for fine stamping micro-textured patterns in the order micro-meters dimension onto sheet product. In this duplication patterns, an original mother micro-pattern convex type has to be transferred metallic concave with sufficient accuracy. The authors have proposed a micro texturing DLC coated die-and mold-unit. Once unit is inserted and fixed stiff cassette die-set, CNC-controlled system works well progressive process duplicate micro-patterns aluminum sheet. present paper, two kinds motion stamper were designed investigate effect loading unloading sequences on geometric accuracy micro-texturing. Both macroscopic microscopic plastic deformations described by SEM observation. First, high density oxygen plasma etching method was introduced explain how fabricate DLC-die unit. constant-load control employed as normal CNC-stamping describe metal flow piercing micro-punch into Deep micro-cavities 3.5x3.5x3 μm3 successfully formed application pressure stamping. pulse-wise further used improve micro-texturing pattern Owing incremental control, micro-friction significantly reduced activate formation micro-cavities.