Sheet metal fabrication is all about forming, shaping, and unifying of the metal to make something useful out of it. In this article we talk about the basic techniques of sheet metal fabrication that are used to form metal based end products. View More: http://www.altparts.com/shear-blades.html

1. Basic Techniques of Sheet Metal
Fabrication
Sheet metal fabrication is all about forming, shaping, and unifying of the
metal to make something useful out of it. There are several tools and
techniques that facilitate the process. In this article, we will talk about
the basic techniques of sheet metal fabrication that are used to form
metal based end products.
Bending
Bending the metal for further processing leads to the formation of much
stronger products than by cutting and welding. It can be done manually
but with the advent of technology now the job has been shifted to
machines which facilitate the job to be done more precisely and quickly.
Cutting
This is probably the most important process for sheet metal fabrication.
It is almost impossible to create things out of metal sheets without
cutting them. The job can be done manually by the use of hand shears
but for large scale productions, advanced shear machines (endowed
with quality ​shear blades​) are preferred to cut metal sheets. Apart from
using heat and high end mechanical machines to cut metal sheets, laser
cutting is increasingly coming up as a method to cut metals in precise
shapes and sizes.
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2. Shrinking
Most metals exhibit the property of expansion on heating and they
contract on cooling. Highly ductile metals exhibit properties of shrinking
to a greater extent which is employed to form a metal product. There
are various methods for doing this as well. It can be done by tucking
metal where the metal is bunched together by forcing it between the
crevices with a spade hammer. Another popular method is heating
where an overstretched area is heated and as the area cools down, it
shrinks. Shrinking disks are also available nowadays that are attached to
an angle grinder which creates heat by using friction. This doesn’t
involve the use of torch or flames to heat and shrink the metal.
Stretching
Stretching is the formation of large contoured parts out of sheet metal
by stretching and bending it simultaneously over a die. The most
common way of stretching metals sheets is by using hammer and dolly
by compressing and further stretching the metal sheet. Sandbags and
plastic mallets can also be employed to do the job in similar fashion.
Alternatively, a stretcher is used which follows the opposite principle of
shrinking.
Metal Fusion
Metal fusion or joining is generally the last step towards the forming of
the end product. The process can be performed by welding different
pieces of metal together. This is the most common type of joining metal
and can be further classified into Oxy Acetylene Welding, TIG Welding,
MIG Welding, etc. Other methods include metal riveting where the
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3. metal is joined without the help of heat or by adhesive agents facilitating
the fusion of two unlike metals.
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