Testing technique for sheet metal forming lubricants - includes measurement of sideways displacement of blank achieved under controlled forming conditions

摘要

To assess the quality of a lubricant used in sheet metal forming, a blank (1) is coated with the lubricant. It is placed between two cutting surfaces (2, 2') and it is subjected to a sideways displacement for ce (F). The cutting force (N) is increased as a function of the displacement, and this is continued until a predetermined force (F) is attained. The lubricants may be assessed as a function of the sideways displacement of the blank which is attained. In the simplest case the displacement force (F) is perpendicular to the cutting force (N). Other arrangements of the block (2, 2') allow the forces (F & N) to be parallel.