Patent ID: 6487470
Filing Date: 2002-11-26
Classification: B05C,G05B,H01F,Y10T

Abstract:
A method for determining optimum enamel die sizes for each of a plurality of dies for fabricating magnet wire with reduced amounts of undercoating and overcoating enamel in a multi-stage fabrication process including at least one undercoating stage utilizing at least one undercoating enamel and an undercoating enamel die and at least one overcoating stage utilizing at least one overcoating enamel and an overcoating die, the wire fabricated in accordance with pre-selected specifications including minimum enamel coat build thickness and percent margin thickness of each of said undercoat and overcoat enamels; said method comprising the steps of:obtaining a build factor constant for each undercoat and overcoat enamel used in the process; and calculating desired die set criteria for at least one of the stages based upon a relationship: Dpf(n)=D0(n)+Kpass(n)(Ddie(n)âˆ’D0(n)) where Dpf(n)=final wire diameter after the nth pass; D0(n)=initial wire diameter at the nth stage; Kpass(n)=build factor for the nth pass; and Ddie(n)=die throat diameter of the nth stage.