Continuous wire drawing apparatus and method

Abstract

A continuous wire drawing apparatus includes: a wire releasing scrollbar and a wire collecting scrollbar being respectively a wire releasing end and a wire collecting end of a metal wire material; a wire drawing force control unit and a back force control unit providing a drawing force and a back force to the wire collecting end and the wire releasing end respectively; a heating unit disposed between the wire releasing end and the wire collecting end, and adapted to heat the metal wire material continuously at a heating temperature in a heating area, whereby the metal wire material is deformed by a strength difference between the drawing force and the back force; and a cooling unit disposed between the heating unit and the wire collecting end, and adapted to cool the metal wire material continuously at a cooling temperature in a cooling area.

What is claimed is: 
     
         1 . A continuous wire drawing apparatus, comprising:
 a wire releasing scrollbar and a wire collecting scrollbar, being respectively a wire releasing end and a wire collecting end of a metal wire material;   a wire drawing force control unit and a back force control unit, providing a drawing force to the wire collecting end and providing a back force to the wire releasing end respectively, so that the metal wire material moves towards the wire collecting scrollbar;   a heating unit, disposed between the wire releasing end and the wire collecting end, and adapted to heat the metal wire material continuously at a heating temperature in a heating area, wherein a range of the heating temperature is 50° C. to 300° C. above a recrystallization temperature of the metal wire material, whereby the metal wire material is deformed by and with a strength difference between the drawing force and the back force; and   a cooling unit, disposed between the heating unit and the wire collecting end, and adapted to cool the metal wire material continuously at a cooling temperature in a cooling area.   
     
     
         2 . The continuous wire drawing apparatus according to  claim 1 , further comprising:
 a protective gas unit, being in communication to the heating unit, so as to provide a protective gas, to protect the heated metal wire material in the heating area.   
     
     
         3 . The continuous wire drawing apparatus according to  claim 1 , wherein a heating element of the heating unit is a closed heater or an inductive heating coil. 
     
     
         4 . The continuous wire drawing apparatus according to  claim 1 , wherein when the metal wire material is a brass wire material, a range of the heating temperature is 500° C. to 800° C. 
     
     
         5 . The continuous wire drawing apparatus according to  claim 1 , wherein a range of the cooling temperature is 25° C. to 30° C. 
     
     
         6 . The continuous wire drawing apparatus according to  claim 1 , wherein an effective interval of the heating area is 10 cm to 50 cm. 
     
     
         7 . The continuous wire drawing apparatus according to  claim 1 , wherein the back force is 10 N to 600 N, the wire drawing force is 100 N to 6000 N, and a wire collecting speed is 2 m/min to 30 m/min. 
     
     
         8 . The continuous wire drawing apparatus according to  claim 1 , wherein an area reduction of shape deformation of the metal wire material is greater than 20%. 
     
     
         9 . A continuous wire drawing method, comprising the following steps:
 providing a metal wire material, comprising a wire releasing end and a wire collecting end;   providing a drawing force to the wire collecting end, and providing a back force to the wire releasing end, so that the metal wire moves;   heating the metal wire material continuously at a heating temperature in a heating area, wherein a range of the heating temperature is 50° C. to 300° C. above a recrystallization temperature of the metal wire material, whereby the metal wire material is deformed by a strength difference between the drawing force and the back force; and   cooling the metal wire material continuously at a cooling temperature in a cooling area.   
     
     
         10 . The continuous wire drawing method according to  claim 9 , further comprising the following step:
 providing a protective gas, to protect the heated metal wire material in the heating area.