We have an Accurpress 713010 130 ton 10' press brake. Yesterday, we were forming .250 thick 5052-H32 Aluminium, ~118" long using .250 radius top punch and 1.5" wide standard 90° V-die. We were able to get our first piece to form up to ~100°, but the machine stopped delivering pressure on subsequent bends. We weren't even able to get a 10" wide piece of the same material to form at all - it would pinch but not generate more than 550 PSI line pressure or about 20 tons ram pressure.
Here comes the odd part - if we put in a piece of .090 AL, it would not only form it, but at the bottom of the stroke it would generate pressure beyond what it was giving us on the .250 AL... line pressure would go to about 1200 psi. If we use no material and bottom out the ram at full pressure, we are able to achieve the machine max of 3800 PSI line pressure and the full 130 tons ram pressure. We did this while checking the overpressure relief valve. But still, no matter what program settings we use (y-target vs. ton target) we can't get the machine to generate the full pressure.
Has anyone else had this problem or a similar one? Is there something we've overlooked?
Accurpress not developing max pressure
Re: Accurpress not developing max pressure
