On the Assessment of Lubricity in the Deformation Process by a Strip-ironing Type Friction Testing Machine : Fundamental Considerations and Measurements of Anti-weldability

概要

論文の詳細を見る
A strip-ironing type friction testing machine, which can measure simultaneously normal and frictional forces acting on the die during the process, has been made on an experimental basis to assess an ability of lubricants to resist the welding at the tool-work interface in deformation processes. It can estimate effects of the bulk plastic deformation of metal ; i.e., an increasing ratio of the frictional surface area η and a sliding distance h on the welding which are important factors for the welding phenomena of the deformation process. To measure anti-weldability by this testing machine, paraffinic mineral oils have been tested with a commercially pure aluminum strip. The following conclusions were made. (1) The frictional coefficient μ and the average frictional shear stress can be expressed by the ratio of the welding area to the total contact area. (2) The ability to resist the welding of lubricants can be assessed by the contour lines of μ = constant on the η-h diagram.
一般社団法人日本機械学会の論文