Hardware spare parts processing plants often use cold extrusion processing technology, so what is called cold extrusion
Cold extrusion is a new technology in machining process with little drilling and no drilling. This is to install the cold extrusion tool on the punching machine, use the simple repeated movement of the punching machine, apply the metal in the mold core to cause plastic deformation, and then get the necessary specifications, appearance and certain characteristics of the mechanical parts. The cold extrusion is carried out under the indoor temperature standard, without heating the blank. Cold extrusion processing can be carried out in the cold extrusion press, but also in general mechanical equipment punch (high-speed punch), four-column hydraulic press, friction press or high speed hammer.
There are three ways of cold extrusion
Are squeezing:
The flow direction of the metal is the same as the fitness movement direction of the mold base, it can produce all kinds of solid core steel pieces (choose solid core blank), but also can produce all kinds of water pipes and shell case parts (choose hollow blank or cup blank).
2. Back extrusion:
When extruding, the flow direction of the metal is opposite to the fitness movement direction of the mold base, and hollow cup shaped parts can be made.
3. Compound extrusion
In compound extrusion, the flow direction of one part of the metal on the blank is the same as that of the mold base, while the flow direction of the other part is the opposite. This extrusion method can be used to produce all kinds of hollow steel pieces with complicated appearance and protrusions.
4. Axial compression
Axial extrusion, the flow direction of the metal and the fitness movement direction of the mold base vertical, the selection of solid core blank or tubular blank extrusion made into disc parts can have convex cavity specified parts.