The plot shown above illustrates the punch force exerted dur

The plot shown above illustrates the punch force exerted during a drawing process. The spike in force is due to which one of the following phenomena? a) Wrinkling b) Tearing c) Ironing d) Burnishing c) None of the above

Solution

ANS : d) burnishing

its Burnishing Due to Burnishing in Manfacturing Drawing process the load to be fluctuate usually to Punch

thats why we can see force varies