A lot of press brake operators get very confused when they’re setting the stroke data (or the Y-axis data) in the press brake controller, especially for the old type press brake. They don’t know what exactly press brake stroke they should set, so the only way to solve the problem is by testing again and again.
Definitely, this is not the right way.
Here I gonna show you how to calculate press brake stroke length with exact formula.
Firstly, please see below the schematic diagram. I will take the data on it as an example.
And the formula to calculate press brake stroke is:
Stroke = Daylight – Middle Plate Height – Punch Height – Die Base Height – (Die Height – 0.5V + t)
For example:
Daylight: 370mm
Max Stroke: 100mm
Stroke = 370-120-70-75-(26-0.5*8+t) = (83-t) mm
Attention should be paid when choosing the die height:
0.5V＜ Stroke ＜Max Stroke
Easy? Try it out now.
P.S: if you want to calculate the required ram depth (or tool stroke) for bending a certain angle, you can use the following online calculator:
