Torsional wire treatment drawing system

Abstract

A torsional wire treatment drawing system for increased drawing speeds and die life by using wet or dry lubricant and by distributing the heat of drawing over two or more drawing dies, thus increasing the ability to remove heat from the system, is provided.

1 . A method of making a torsional wire treatment drawing system comprising:
 providing a suitable die holder;   providing a pressure insert, wherein the pressure insert has a pressure insert exit end;   grinding flat the pressure insert exit end;   covering the pressure insert exit end with a soft material;   providing a first drawing die insert, wherein the first drawing die insert has a first drawing die insert entrance end and a first drawing insert exit end;   grinding flat the first drawing die insert entrance end and the first drawing die insert exit end;   covering the first drawing die insert entrance end and the first drawing insert exit end with the soft material;   providing at least one additional drawing die insert, wherein each additional drawing die insert has an additional drawing die insert entrance end;   grinding flat each additional drawing die insert entrance end;   covering each additional drawing die insert entrance end with the soft material;   forming holes for the passage of wire stock through the pressure die insert, first drawing die insert and each additional drawing die insert; and   assembling the pressure die insert, first drawing die insert and each additional drawing die insert in the suitable die holder.   
   
   
       2 . The method of  claim 1 , wherein the soft material is copper. 
   
   
       3 . The method of  claim 2 , wherein the copper is applied by an electroplating process. 
   
   
       4 . The method of  claim 2 , wherein the copper is applied by a dipping process. 
   
   
       5 . A method of making a torsional wire treatment drawing system comprising:
 providing a suitable die holder;   providing a pressure die insert;   providing a first drawing die insert;   providing a at least one additional drawing die insert;   forming holes for the passage of wire stock in the pressure die insert, the first drawing die insert and each additional drawing die insert; and   assembling the pressure die insert, the first drawing die insert and each additional drawing die insert in the suitable die holder.   
   
   
       6 . A torsional wire treatment assembly which includes a first wire drawing die with an outside tapered diameter and at least one of an additional wire drawing die with an outside tapered diameter, the first wire drawing die having a first drawing throughbore for drawing wire, the at least one of an additional wire drawing die having an at least one drawing throughbore for drawing wire and a drawing die holder wherein the drawing die holder has a front end and a back end relative to a wire drawing direction of the assembly, a cylindrical opening with a threaded peripheral wall extending into the drawing die holder from the front end, and a converging passageway having an upper portion and a lower portion leading from the cylindrical opening toward the back end of the drawing die holder for receiving the first drawing die and the at least one of an additional wire drawing die, wherein the first drawing die has a first tapering outer surface larger in diameter than the at least one of an additional drawing die to fit in the upper portion, the at least one of an additional drawing die has a second tapering outer surface smaller in diameter than the first drawing die to fit in the lower portion and wherein there is a void area of acceptable geometry larger in diameter than wire exiting the first drawing die that defines a pressure chamber which allows lubricant to build pressure between the first and at least one of an additional drawing die and wherein the assembly further includes thread-in means for threading into the cylindrical opening and removably pressing the first drawing die into the passageway, wherein the thread-in means comprises a combination of a pressure die and a pressure die holder, the pressure die holder having a threaded outer surface for threading into the cylindrical opening and a bore in a rear portion thereof receiving the pressure die, the pressure die projecting from the bore to press against the first draw die, wherein the bore in the rear portion of the pressure die holder leads from a lubricant inlet passage in a front portion of the pressure die holder wherein the pressure die has a further pressure throughbore for passage of wire stock to the first drawing throughbore and to the at least one of an additional drawing throughbore, wherein a back portion of the pressure throughbore in the pressure die and a forward portion of the first drawing throughbore together define a first pressure chamber for lubricant delivered through the lubricant inlet passage; and wherein there is a void area larger in diameter than wire exiting the first drawing die that defines a second pressure chamber which allows lubricant to build pressure between the first drawing die and the at least one of an additional drawing die and wherein a projecting portion of the pressure nib securely presses the first tapered drawing die into the tapered female drawing die holder to prevent passage of high pressure lubricant in the direction of the pressure die. 
   
   
       7 . A torsional wire treatment assembly of  claim 6 , wherein the pressure die is a carbide pressure die. 
   
   
       8 . The torsional wire treatment assembly of  claim 6 , wherein the pressure die is a hardened steel pressure die. 
   
   
       9 . The torsional wire treatment assembly of  claim 6 , wherein the pressure die is a diamond pressure die. 
   
   
       10 . The torsional wire treatment assembly of  claim 6 , wherein the first wire drawing die is a carbide drawing die. 
   
   
       11 . The torsional wire treatment assembly of  claim 6 , wherein the first wire drawing die is a diamond drawing die. 
   
   
       12 . The torsional wire treatment assembly of  claim 6 , wherein the at least one of an additional wire drawing die is a carbide drawing die. 
   
   
       13 . The torsional wire treatment assembly of  claim 6 , wherein the at least one of an additional wire drawing die is a diamond drawing die.