Design a hydrocooling unit that can cool fruits and vegetables from 30 to 5°C at a rate of 20,000 kg/h under the following conditions: The unit will be of flood….
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Explain why a metal with a fine-grain microstructure is better suited for fine blanking than a coarse-grained metal.
Explain why a metal with a fine-grain microstructure
is better suited for fine blanking
than a coarse-grained metal.
A fine-blanking operation can be demanding;
the clearances are very low, the tooling is elaborate
(including stingers and a lower pressure
cushion), and as a result the sheared surface
quality is high. The sheared region (see Fig. 7.6
on p. 353) is well defined and constrained to
a small volume. It is beneficial to have many
grain boundaries (in the volume that is fracturing)
in order to have a more uniform and
controlled crack.
