The press I'm thinking of trying this on first has several diferent tools existing that could be used on it. All of these tools have different footprints, so pneumatic clamping will have more cost in order to standardise the footprint. As for the four bolts, you're right they won't take that...
As part of a QDC project it has been proposed to use magnets to clamp a press tools bottom bolster to the press by magnets. The tools base is 2m long and 0.5m wide and the magnetic field will be reaching 40mm into the feet of the bolster. The magnetic clamps would have to overcome the upward...
