Analysis of Trimming of Aluminum Closure Panels

Pieces of aluminum are generated during trimming of aluminum body panels. Commonly referred to as slivers, these pieces can be imprinted into the surface of stamped panels. This may require metalfinish of every stamped exterior panel. The objectives of the present study were to investigate the influence of trimming conditions on the quality of trimmed surfaces and determine modification of the trimming process to eliminate slivers. Suggested solution is to machine a small radius on the upper shearing edge and to control the clearance between the shearing edges within several percents of the material thickness.