Abstract
Chatter in the plug drawing of tubing is a common production problem which is manifest by visual and audible symptoms. Chatter can also produce subtle variations in product dimensions which may result in product rejection during final inspection. A model of this behavior based on stick-slip phenomena is developed for the purpose of identifying measures to reduce or avoid chatter. The measures suggested by this model are: increase draw velocity, increase spring rate of primary load carrying members (drawn tube and plug support rod), increase area reduction of draw pass, decrease tube material flow strength, and change in lubrication.
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