Metal sheets of only a
certain thickness can be inserted into metal stamping machines. The maximum
limit for most metal stamping machines is? However, machines can be designed to
accommodate sheets of greater thickness also. Even the kind of Stamping
Part that can be processed in metal stamping are also specific. Only
certain metals or alloys can be used like aluminum, brass, steel (hot rolled or
cold rolled), galvanized steel, stainless steel, copper, zinc and titanium.
Before the metal sheet is inserted into the machine, the customer provides the
prototype or at least a diagram of the final product. In case the customer
doesn't have a clear idea of what the final product should look like, most
metal stamping producers also offer engineering services for designing the
products as well. Even some secondary services such as deburring and plating
are provided by the metal stamping companies after the metal sheet is stamped.
There are three main components in sheet metal stamping -- the die, the punch and
the binder/blank holder. The sheet is kept between the blank holder and the die
and the punch is driven into the die wherein the sheet spreads over the die
because of the drawing and stretching. The blank holder provides the
restraining force that is required to control the sheet flow into the die. This
force prevents wrinkling and tearing of the sheet as the quantity of material
going into the machine can be controlled. For some processes where the blank
holder force is too high for the material, draw beads are used to create the
restraining force. Sheet metal stamping is also known as thin stampings. Sheet
metal stamping is used most primarily in the case-building process. It is also
the most important part as each of the panels has to be stamped one by one.
First the motherboard tray is stamped, then one-side panels on the right and
left from bottom to top and back.
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