Pressbrake

I'll have a look underneath but theres nothing obvious. Might end up taking some bits apart. How much adjustment can be had from the fine tuning to the bottom beam?

On the Adira I had, which is a Clone of the Promecam there was about 150mm of adjustment, you should be able to back the handle off, press the pedal and then wind the beam up into the tool.

20mm vee is fairly tight, put a 30 in and youll get much more.

150mm of adjustment seems a lot? I presume the machine has an over pressure limit so when it reaches 25 tonnes the oil wont exurt any more force on the rams?

You can get a lot of different tooling for presses, not just bending, but redman punches, flattening and dutch folding tools, deep punches, tall upstanding vee's etc. etc, all will require different beam settings, the hyd pump will have a blow off valve, but you should set the bending force (tonnage) off the chart to suit the tooling using the hand knob, although most presses tend to have that wound in, and the operators set the bend depth on the rising beam, its not really the correct way though.

I've been round the back This is the working end of the windy handle lever jobby that had the cnc jobbie on. The bar pulls in and out, acting on the lever thing which in turn disappears into the hydraulics.

Am i right in thinking that this lever is the fine tuning for the tonnage, or for the stroke? I've been happily bending away, just by careful setting of the knurled force setting knob thing on the left hand side.



The second picture needs rotating 90 degree to the left to get it in the correct orientation, but it crops the picture down. The lever with the spring on it is the bit that sticks out of the machine that had the cnc thing on.

Yep. its the stroke, the handle winds it in and out, clockwise for up.

So should the tonnage be set at a bit more than is required and the limiter used to set the exact bend?

Originally Posted by Welderpaul

So should the tonnage be set at a bit more than is required and the limiter used to set the exact bend?

That how I do it, the tonnage knob is supposed to be set to the correct pressure for the tooling, as per the chart on the machine, in reality the knob gets wound all the way in and never adjusted again, the danger is that its easy to strain the tooling and the press frame if the stroke is too long with full tonnage.