Factors affecting wire drawing dies’ drawing

Factors affecting wire drawing dies’ drawing

(1) Copper, aluminum rod (wire) material. When other conditions are the same, the tensile force of the copper wire is larger than that of the aluminum wire, and the aluminum wire is easy to break, so the reliability coefficient should be larger when drawing the aluminum wire.

 

(2) Tensile strength of the material. There are many factors in the tensile strength of the material, such as the chemical composition of the material, the calendering process, etc., and the tensile strength is high.

 

(3) Degree of reduction. The greater the degree of reduction, the longer the length of the reduction section in the die hole, thus increasing the positive pressure of the die hole on the line, the friction force will also increase, and the tensile force will also increase.

 

(4) Friction coefficient between wire and die hole. The greater the coefficient of friction, the greater the tensile force. The friction coefficient is determined by the finish of the wire and die material, the composition and quantity of the lubricant.

 

(5) The size and shape of the die hole working area and the sizing area. The larger the sizing area, the greater the tensile force.

 

(6) The position of the wire drawing die. The improper placement of the wire drawing die or the deflection of the die base will also increase the tensile force. It also makes the wire diameter and surface quality not up to standard.

 

(7) External factors. The wire is not straight, the wire dithering during the drawing process, and the pay-off resistance will increase the tensile force.

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