Description

Pressure die drawing has several marked advantages over the carbide wiredrawing process when drawing hard or temperature-sensitive aluminum alloys. The pressure that is proportional to wire speed and lubricant viscosity, and inversely proportional to the pressure die gap, has to be controlled to maintain wire size control. As pressure can readily build up to a point where either wire size control is lost or the die holder will burst, the user has to be able to estimate the actual pressure generated under the conditions encountered in the process. This paper examines the effect on the pressure of varying the drawing speed, different drawing lubricant viscosities and varying the pressure die gap.