Which process is widely used in wire drawing industry?

Wire drawing is a metal working process used to reduce the cross section of wire by pulling it through a series of dies. This process is a type of forging. Forging is the plastic, or permanent, changing of a metal shape. Forging can be performed at hot, warm or cold temperatures.

How is metal drawn into wire?

The wire drawing process is quite simple in concept. The wire is prepared by shrinking the beginning of it, by hammering, filing, rolling or swaging, so that it will fit through the die; the wire is then pulled through the die.

What is wire drawing manufacturing technology?

The wire-drawing process consists of pointing the rod, threading the pointed end through a die, and attaching the end to a drawing block. The block, made to revolve by an electric motor, pulls the lubricated rod through the die, reducing it in diameter and increasing its length.

What is the advantage of wire drawing?

The advantages of wire and rod drawing of other applications are: Good surface finishing. Adaptability to mass production. Close dimensional control.

What are the defects of wire drawing?

Defects from the deformation process, i.e., center burst or cracking (cupping). This defect will occur for low die angles at low reductions. For a given reduction and die angle, the critical reduction to prevent fracture increases with the friction.

What is hot drawing?

Definition of hot-draw : to draw (as metal or nylon) while hot or with application of heat.

What is the difference between wire and bar drawing?

Basic difference between bar drawing and wire drawing is the size of bar stock used for bar drawing is large. Wire is a drawn product having less than 5 mm. For wire drawing smaller diameter bar stock is used.

How do you calculate reduction in wire drawing?

In drawing wire, the required deformation is accomplished by drawing the wire through the conical bore section of the die, hereby reducing the diameter through plastic deformation….

WIRE DRAWING
Calculation of lubricant film thickness between wire and die
Area reduction (A1-A2)/A1	%
diameter d1	mm
reduction angle φ	deg

Which type of force is applied in wire drawing?

In the process of drawing, the cross section of a long rod or wire is reduced or changed by pulling (hence the term drawing) it through a die called a draw die. Pulling of rod through the die is done by means of a tensile force applied to the exit side of the die.

What is the disadvantage of hot working?

The disadvantages are: Undesirable reactions between the metal and the surrounding atmosphere (scaling or rapid oxidation of the workpiece) Less precise tolerances due to thermal contraction and warping from uneven cooling. Grain structure may vary throughout the metal for various reasons.

What is DDR and DBR?

The calculators below allow you to calculate DDR (draw Down Ratio) and DBR (Draw Balance Ratios) for a given Tip Outer Diameter (OD), Die Outer Diameter (OD) and finished product OD and ID ( Inner Diameter).