Tribology in Metal Forming II

Dear Colleagues,

In the manufacturing in the 21^st century, the correspondence of the environmental problems and the proposals with Industrial 4.0 in EU and Society 5.0 in Japan must be considered.

As the environmental problems of lubricants, studies on the protection of human health from lubricants in metal forming have been carried out. For example, these studies are focused in chlorinated paraffin oils in sheet metal forming as ironing process, graphite based, “black” lubricants in hot forging of steels and zinc phosphating plus soap in cold forging. In each field, new lubricants have been developed by replacing these harmful lubricants. On the other hand, as the environmental problems of automobile parts manufactured by metal forming processes, studies on the weight reduction of parts have been carried out in order to reduce the emission of CO₂. For example, these studies are focused in the high strength steels, and the aluminum or magnesium with small specific gravity. In the case of the high strength steels, new lubricants with high lubricity for the seizure have been developed. In the case of aluminum and magnesium with small specific gravity, new lubricants with high lubricity in elevated metal forming processes as hot stamping, and warm and hot forging have been developed.

Next, as the correspondence to the manufacturing with Industrial 4.0, studies on the lubrication mechanism in metal forming have been carried out. For example, when automobile parts are manufactured by Cyber Physical System, the physical model with high precision on the friction must be constructed in order to calculate the load and the deformation of part. However, the physical model about the friction at the interface between tool and workpiece can not be constructed in metal forming. Therefore, studies about the friction model in metal forming have been carried out. Moreover, in order to manufacture the automobile parts by Cyber Physical System, the automatic supply system of lubricant must be developed. In each field, the national projects in the world are carried out.

This Special Issue aims the latest research on above mentioned tribological problems in metal forming. I am expecting contributions from academic and industrial researchers.

Prof. emer Akira Azushima
Guest Editor

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• Tribology
• Metal Forming
• Environmental Problem
• Lubricant
• Cold Forging
• Hot Forging
• Hot Stamping
• Ironing
• Cyber Physical System
• Lubrication Mechanism
• Friction Model