Product Description and Process
precision cold forging parts aluminum profile extrusion plant
Production process: cold extrusion process
Machining process: CNC machine, machining center, lathe, mill machine, drill machine, etc.
Surface treatment process: anodic oxidation, Dacromet coating, paint coating, powder coating, etc.
Product Material and Uses
Normally produce with aluminum L1, L2, L3, L4, L5, Aluminum alloy LF21, LY11, LY12, LD10, Brass H62, H68, carbon steel Q195, Q215, Q235, Q255, 10, 15, 20, 25, 30, 35, 40, 45, low alloy steel 15Cr, 20Cr, 20MnB, 16Mn, 30CrMnTiA, 12CrNiTi, 35CrMnSi, stainless steel 1Cr13, 2Cr13, 1Cr18Ni9Ti, etc.
The extrusion products are widely used for auto-car parts, truck parts, train parts, vehicle components, aviation industry components, gear parts, spline parts, universal joint crossing shaft, other machinery components, etc.
Aluminum Extrusion is a plastic deformation process of a pre heated aluminum billet which is forced to flow by compression through a steel or ceramic die with an aperture of a smaller cross-sectional area than the original billet.
The aluminum extrusion process can be used to produce a variety of solid, hollow sections and profiles produced by extrusion through flat, porthole or bridge type dies.
Seamless tubes and seamless hollows sections must be produced using either hollow billets or solid billets using a piercing press and mandrel system.
There are two main methods of aluminum extrusion, these are:
Direct Aluminum Extrusion
With direct aluminum extrusion the preheated billet is placed in a heated part of the press called the container. Here, the billet is pushed through the die by ram pressure. The direction of the metal flow is in the same direction as the ram travel. During this process, the billet slides relative to the walls of the container, resulting in a necessary increase in ram pressure to overcome the friction between the billet surface and container liner.
Not all the aluminum billet is extruded. A percentage of the compressed billet, called the discard or butt is left at the end of the extrusion cycle. This is ejected from the press during its dead cycle operation, and ‘recycled’ at a later time. The extruded profile is then transferred on to the press’s handling system for further process.
Indirect Aluminum Extrusion
With indirect aluminum extrusion, the die located at the front end of a hollow stem moves relative to the container. The die is either pushed through the container or the container is pushed over the die. There is no relative displacement between the billet and the container liner. Therefore one advantage of the indirect extrusion process is that there is no friction, during the process, between the billet and the container liner. The metal flow is more uniform during indirect extrusion than direct. This usually relates to better section uniformity along its length.
A discard/butt is produced as with the direct process, which is handled in the same way. The extruded profile is again transferred on to the press’s handling system.