Rod/Wire Drawing

This chapter first defines rod/wire drawing operation, taking into consideration the diameter ranges for bar, rod, and wire. The advantages and developments in the wire drawing process have been reviewed, including the recently developed die-less wire drawing practice. Rod/wire drawing has been analyzed by developing mathematical models for the reduction ratio, the draft, the true strain, the av. flow stress, the ideal draw stress, the actual draw stress, the draw force, and power (both in SI and ft-lb-min units). Continuous wire drawing has been discussed with reference to lubrication and the formula for determining the number of dies and capstan drums required for a wire drawing operation has been derived. This chapter contains 8 diagrams, 24 worked numerical examples, 12 formulae or equations, 8 problems, and 8 MCQs with their answers given at the end of the book.