Influence of tool texture on friction and lubrication in strip reduction

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Abstract

Tool texturing is studied as a method to enhance lubrication and prevent the occurrence of galling. Strip reduction test tools manufactured with longitudinal, shallow pocket geometries oriented perpendicular to the sliding direction are tested. The pockets have small angles to the workpiece surface and varying distance. The experiments show an optimum distance between the pockets to exist that creates table mountain topography with flat plateaus and narrow pockets in between. If the flat plateaus are too narrow, an increase in drawing load and pick-up on the tool plateaus is observed. The same occurs for too wide plateaus. A theoretical friction model supports the experimental findings of an optimum distance between the pockets, where the contribution to friction by mechanical interlocking of the strip in the pockets is limited and lubrication of the plateaus is enhanced by micro-plasto-hydrodynamic lubrication.

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Sulaiman, M. H., Christiansen, P., & Bay, N. (2017). Influence of tool texture on friction and lubrication in strip reduction. In Procedia Engineering (Vol. 207, pp. 2263–2268). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2017.10.992

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