Many of the same manufacturing fact

Many of the same manufacturing factors of extrusion are also present in drawing. Similar to extrusion, the die angle, amount of area reduction, and geometry of cross sections are all essential considerations. Friction and its effects on metal flow should be controlled. There is a fundamental difference between extrusion and drawing practice, based on the fundamental difference between the two processes. Metal extrusion can provide tremendous reductions in cross sectional area by pushing the material through the mold. In metal drawing the amount of cross sectional reduction is much more limited by the fact that the metal is pulled through. As in extrusion, the greater the reduction in cross sectional area the greater the force required to form the work. When the force needed to pull a work piece through a mold exceeds the yield strength of the work, it will begin to yield. Yielding of the work in this manner is not desirable in drawing manufacture.