Quote Originally Posted by Peter Dow View Post
One other possibility might be to swap the top and bottom offset dies around and have the 45 degrees going upwards, though this would require a more difficult task to position the sheet for bending.
Yes on second thoughts, it looks a much better solution with the modified offset die as the top die.



The yellow line indicates the positioning of the sheet against a back-gauge for a down-stroking press brake, before the press action.

The green line indicates the positioning of the sheet against a back-gauge for an up-stroking press brake, before the press action.



Here instead of adding a base to the modified die, the red area indicates the edge of the top die holder which must be machined off to stop fouling the sheet at a 45 degree up angle.

Here note the edge of the die labelled "L" is at a sloping angle to the vertical. The reason for this is to provide a positioning stop for the sheet (as an alternative or additional stop to the use of a back-gauge stop) to allow space between the corner of the previous bend in the sheet and the edge of the die, to allow for the sheet being pulled in by the bend. The "L" angle shown is for illustrative purposes only. I have not worked out what the angle should be for best results yet.