doi: 10.3850/978-981-11-0749-8_668
Micro-Dimple Texturing for Semi-Dry Stamping Dies
T. Aizawa1, H. Morita2 and T. Inohara3
1Department of Engineering and Design, Shibaura Institute of Technology
2Nano Film and Coat Laboratory, LLC
3LIPS-Works, Co., Ltd
Abstract
Toward the green manufacturing, the minimum quantity lubrication (MQL) was high-lighted in the semi-dry stamping. Besides for the hard coating technologies, the micro-texturing was effective to preserve the lubricating oil film onto the contact interface from the micro-dimples. Two micro-texturing methods were proposed: the natural micro-texturing via the low temperature plasma nitriding, and, the artificial micro-texturing via the picosecond laser machining. Low friction and wear conditions were preserved for the stainless steel substrates in the ball-on-disc testing. The laser micro-texturing was further utilized to make micro-dimple formation on the curved die inlet to reduce the wear during the ironing step in the semi-dry progressive stamping.
Keywords: Micro-texturing, Micro-dimple pattern, Semi-dry stamping, Dies, Tribology, Nitriding, Laser machining.
