Next, at the end of the backward stroke of the first ram, the forming punch together with the pressure pad is lowered to form {HEAD ~ a bulge} on {TAIL ~ a head portion} of the coupling element 
on
Next , at the end of the backward stroke of the first ram , the forming punch together with the pressure pad is lowered to form { HEAD ~ a bulge } on { TAIL ~ a head portion } of the coupling element
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH