Chevy Spark Forum : Chevrolet Spark Forums banner
1 - 1 of 1 Posts

· Registered
1 Posts
Discussion Starter · #1 ·
The aluminium tube is often manufactured with extrusion services, there are two types of common aluminum extrusions.

What is Seamless Extrusion?

Seamless extrusion is one of the most popular methods of extrusion. This is a completely extruded hollow tube with no welding or bracketing along the profile's entire lineal length.

A piercing extrusion technique is used to make a smooth aluminum tube. Starting with a solid round aluminum billet as the raw material, it is heated to the desired temperature before being punched with a small hole at one end to serve as the starting point.

After that, rotary piercing is used. The billet is buffeted between a pair of barrel-shaped rolls during this fast rolling process. The piercing tool forces the material to flow along the roll, causing high tensile stress to occur in the center of the billet. When this force is applied, the profile shell emerges. The metal will be reheated as needed in the process, and then it will be stretched further and cooled. Before the finished product is ready to ship, it can be cut to the desired length and any final shaping or finishing can take place.

The absence of a welded seam, which is the mechanically weakest point of the profile's construction, is the key benefit of the seamless extrusion process. As a result, the final product has a higher structural integrity and is less susceptible to weld line failures; seamless extrusions are the ideal material for pressure vessels. Anodizing and other finishing procedures are also possible with seamless hose.

Seamless extrusions are used in a number of applications, including hydraulic cylinders, compressed gas cylinders, drive shafts, lighting applications, and bus conductors, in addition to pressure vessels. A seamless extrusion is likely to be used for anything that requires critical pressure ratings, challenging shaping applications, high strength requirements, or a consistent anodized appearance.

What is Structural Extrusion?

A structural extrusion, unlike a seamless extrusion, is designed to be connected to another extruded component using welding, brackets, or some other type of fastener. This means that the weld point or connector holding the components together would be the weak point of the extrusion, regardless of how solid the extruded material is.

The porthole or bridge die method is used to create hollow profile structural extrusions, such as tube. The aluminum billet is pushed through the die at high temperature with immense power, similar to a seamless extrusion. The profile wall must be pushed back together inside the die because it will separate during the extrusion process. As the material passes through the extrusion die inside the extrusion press, this will happen.

If the pipe has been finished or anodized, there should be a clear seam separate from any die lines, distinguishing an extruded pipe from a seamless product.

Extrusion provides better regulation of wall thickness eccentricity, which is one of the benefits it provides. Multi-hole dies, which allow for smaller profile sizes, are also an option. Structural extrusions are often more cost-effective than other types of extrusions.

slots, angles, tracks, fasteners, and brackets are only a few of the ways structural extrusions can be linked. Aluminum frames to which plates, wire mesh, or displays may be attached are examples of applications. The industry has progressed to the point that these extrusions can now be bought in kits and assembled in a matter of minutes. Manufacturing, retail, automobile, and medical sectors are all good examples of typical use cases. Office workstations, computer bases, enclosures, industrial racking, fixtures, safety guards, ramps, platforms, and material handling carts are only a few examples of what they can be used for.
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.