ES346581A1 - Improvements relating to Pressing Metal Work-pieces - Google Patents

Abstract

and B3Q. A method of securing together metal parts comprises feeding a first part 11 beneath a die 16 in a press, placing a second part 6 beneath the die, closing the die on to the parts, ejecting them from beneath the die and simultaneously feeding another first part 11 into position beneath the die. As applied to securing simultaneously pairs of closure flanges 11 in openings in drum heads 6, the flanges are fed along shoots 28 to anvils 17, a drum head is placed manually over the flanges and curling dies 16 are operated to curl the ends of the flanges over necks 10 on the drum head. The shoots are connected at one end to locating rings 23, Fig. 7 and Fig. 9 (not shown), for the flanges, which are fed along the shoots by pushers 42, 43. Rails 38, 39 supporting the pushers 42, 43 and a pusher 45a for the drum ends are interconnected by a member 40 connected to a pneumatic cylinder 31 for operating the feed. The press-ram 2 may be operated mechanically or by an hydraulic cylinder 3, and the feed cylinder 31 is operated by a four-way valve (not shown) controlled by valves 47, 55. Operation.-A first flange 11 is placed manually in each ring 23 and a drum-end located over the flanges. A further flange is placed in each feed shoot 28 before the press is cycled. An abutment 53, Fig. 1, on the platen 4 deflects a pawl 52 as the ram descends without operating valve 47. During the return stroke of the platen, the pawl 52 opens the valve 47, causing the four-way valve to operate the cylinder 31 in a feed stroke. As the second pair of flanges are fed along the shoots 28 towards the anvils, the drum-end in which the first pair of flanges has been secured is discharged by the pusher 45a on to a conveyer (58), Fig. 6 (not shown). At the end of the feed stroke, a cam 57 on the rail 38 opens valve 55, causing return of the pushers.