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Experimental Investigation and Fabrication of Pneumatic Punch

A. K. Gupta, P. Bharadwaj, S. Sahgal, P. M. Pradhan

This paper presents the investigation, design and fabrication of blanking of thin sheet (0.1-2 mm) of different sheet material. The blank diameter is considered as 10 mm. The study helped to evaluate the influence of tool clearance, burr formation, sheet thickness, punch/die size and blanking layout on the sheet deformation. The punch load variation with tool travel and stress distribution in the sheet has been obtained. The results indicate that a reduction in the tool clearance increases the blanking load and formation of burr increasing or decreasing at different pressure. The objective of this paper is to study the behaviour of punch and formation of burr.