Over Bend Deflection on Stainless Steel

[Luke1027]

Hello,

I am looking for an Over Bend Deflection formula for Stainless (.094 thick).

Like if I have a 35deg. bend needed, would I make the bend at 37 deg. such that the deflection it comes back would be 35 deg.

Any info or experience on a good starting point to start with would be great.

The thing is I need to manufacture a punch out of D2 56-58 Rc for form this bend for a customer and then put it into their machine with minimum down time … so I really need to get it right the first time.

Thanks for any who share.

Luke

 

[MikeHalloran]

Get a piece of the exact alloy that your customer uses, cut some test pieces, and bend it yourself. I don't know of an accurate way to predict it to the precision that you need.



Mike Halloran
Pembroke Pines, FL, USA

 

[MikeHalloran]

Get the same temper, finish, and manufacturer if you can.



Mike Halloran
Pembroke Pines, FL, USA

 

[ajack1]

The size of the component will also be a factor so producing a scaled down sample tool and piece is not really that good an idea.

Can you get any information from the material supplier? Failing that 1-2 degrees over top limit is probably a reasonable place to start, you should at least minimise the amount of rework required.

Also use the press you will use in production if possible.

 

[Luke1027]

Thanks Men ...

I really do not have the Luxury to test before making the Punch/Die. Getting it close for starters and then reworking sounds like the best solution in this case. I was hoping someone on this forum might have had some experience on working with this type of work before and has seen a characteristic in about what it would take to make a very close bend without testing.

Thanks again,

Luke

 

[MikeHalloran]

You might get a decent guess if you'd reveal the alloy and temper of the workpiece, and the bend radius you're trying to attain.





Mike Halloran
Pembroke Pines, FL, USA