Welding is a very important aspect of engineering and manufacturing. Without this ability, strong and durable connections between materials would not be possible. Thus making it hard to produce many different items that we rely on in our everyday lives, some examples being medical implants and electrical devices. This is why we have put together some welding Birmingham tips.
The Year of Engineering is a government campaign that has been established to celebrate the wonder of the field and is aiming to shake up people’s perception of engineering. In 2018, this campaign plans to inspire the next generation of inventors, innovators and problem-solvers by demonstrating what engineers actually do.
Metal fabrication is an extremely sought after trade in many industries.
Likewise with specific trades, metal fabrication takes time; and learning the methods of working with metal, training through college and apprenticeships are necessary.
If you are looking for a career in metal fabrication, it is important for you to learn the correct techniques to ensure you are prepared and have the appropriate knowledge for a job in the metal fabrication field.
As steel is such a versatile material, there are a wide range of stainless steel fabricating techniques.
In order to understand the benefits of the different types of stainless steel fabrication, we should take a look at the processes behind steel fabrication.
Stainless steel, although having a relatively high strength and work hardening rate, is malleable enough to be manipulated; bent, deep drawn, folded, machined, spun or welded.
The process of work hardening is strengthening the material through deformation. Relative to other varieties of steel, any stainless steel work will harden quickly, however, the rate will depend on the specific grade of the alloy.
It will be useful to match the steel grade with a work hardening treatment that is suitable. As austenitic stainless steel is often only hardened only through cold working a treatment process with thermal properties would best be applied to other grades such as those in the martensitic family.
The magnetism of stainless steel can be increased through work hardening. Steel’s magnetism does tend to be relatively slight, however, the higher work hardening rates exhibit higher levels of magnetic capacity following the treatment.
Steel fabrication is the name given to the process of bending, cutting and shaping steel alloy to create a product.
Cutting would be done by sawing, shearing, or chiselling (all with manual and powered variants); torching with hand held torches (including oxy-fuel torches or plasma torches) and through numerical control cutters, using either a laser, torch or water jet.
Bending is the process of hammering (either powered or by hand) or through press brakes and other similar tools. More recent techniques will use press brakes to either coin or air-bend a metal sheet into a desired form. CNC-controlled back-gauges will use any hard stops in order to position cut parts to then place bend lines in the appropriate position. CNC-controlled press brakes can now be programmed to be seamless and efficient through off-line programming software.
The assembly will be done by binding with adhesives, threaded fasteners, riveting, welding or more bending in the form of a crimped seam. Structural steel and sheet metal are the typical beginning materials for fabrication, along with the welding wire, flux, and fasteners that will join the cut pieces together. The end product from fabrication could be called a fabrication.
Frequent raw metals that are utilised by metal fabricators are:
– Plate metal
– Formed and expanded metal
– Tube stock
– Welding wire/welding rod
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Welding is the key focus of steel fabrication.
The parts that have been formed and machine will then be assembled and tack welded into place and then checked again for accuracy. It is possible a fixture may need to be used to locate the parts for welding if multiple weldments have been ordered.
The welder will then continue to finish the welding against the engineering drawing if the welding is has a detailed plan, or against their own judgment on the chance no details have been given.
Precautions may need to be taken to prevent any warping of the weldment due to the heat. It may call for a re-design of the weldment to use less weld, welding in a staggered fashion, using a stout fixture, covering the weldment in sand during cooling, and the straightening operations once done welding.
The straightening of steel weldments that have warped would be done with an Oxy-acetylene torch; heat would be applied to the steel in a linear sweep in a slow motion. The steel should have a net contraction, once cooled, following the direction of the sweep.
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