Multiple slip type wet-drawing process
AssigneeBridgestone Corporation
InventorHisakatsu Hara
Life of this patent
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Abstract
In a multiple slip type wet-drawing process using plural drawing pass stages each comprised of a die and a capstan drawing a wire rod passed through the die, an average slip rate in each drawing pass stage other than a final stage is set to a range of 5.about.80 m/min, whereby the wire drawing is carried out without causing problems such as damage of wire rod surface, wire breakage, premature wearing of die and the like.
Claims4
A multiple slip type wet-drawing process for making a wire filament comprising drawing a wire rod through successive plural drawing pass stages each comprised of a die and a capstan which draws the wire rod through the die;
- wherein an average slip rate S.sub.i in each drawing pass stage other than a final stage is defined by the following equation:
- S.sub.i =Vc.sub.i -Vw.sub.i
- wherein Vc.sub.i is a peripheral velocity of a capstan at each stage and Vw.sub.i is an average velocity of a wire rod passed through a die at each stage, is set to within a range of from 5 to 80 m/min.
Dependencies are inferred from the claim text.