Is cold heading and cold extrusion the same thing?

Time:

2024-01-25

Is cold heading and cold extrusion the same thing?

Cold heading and cold extrusion are basically deformation processing under the same conditions, but their operating methods are different.
Cold blocks belong to the forging deformation of smaller workpieces and are commonly used in the fastener industry. Cold extrusion, on the other hand, belongs to the deformation of larger workpieces and is widely used.
What is cold extrusion?
Cold extrusion is a processing method that places a metal blank in the cold extrusion die cavity and applies pressure to the blank through a fixed convex die on a press at room temperature, causing plastic deformation of the metal blank and producing parts. Obviously, cold extrusion processing relies on the mold to control the flow of metal and the transfer of a large amount of metal volume to form parts.
What is cold heading?
Cold heading process is one of the new technologies for pressure machining of metals with little or no cutting.
It is a processing method that utilizes the plastic deformation of metal under external forces, and with the help of molds, redistributes and transfers the volume of metal to form the required parts or blanks.
Is cold heading and cold extrusion the same thing?
Cold pier and cold extrusion are basically deformation processing under the same conditions, but their operating methods are different.
Cold blocks belong to the forging deformation of smaller workpieces and are commonly used in the fastener industry. Cold extrusion, on the other hand, belongs to the deformation of larger workpieces and is widely used.
Cold heading is equivalent to a branch of cold extrusion. Simply put, in the process of making bolts, hexagonal head forming belongs to cold heading, and rod reduction belongs to cold extrusion (forward extrusion). Non cut hexagonal flange bolts (multi station forming) have both cold heading and cold extrusion. The front edge of hexagonal nut forming is only shaped by cold heading, and the subsequent process of extrusion holes belongs to cold extrusion (forward and backward extrusion).