Learning Forum

[benjamin]

Good morning,

I’m encountering an issue with a common customer’s bending tables and can’t quite pinpoint the cause.

The table appears to be set up correctly, displaying consistent data for most thicknesses. However, there’s an exception with one specific thickness:

For a radius of 0.8 and a thickness of 0.8, the bend deduction is showing as 1.27 mm. This does not match the value specified in the tables, where the bend deduction should be 1.4 mm.

This discrepancy only occurs with the 0.8 thickness. I’m unsure if there’s an error in the tables or if something else is affecting the calculation.

 

Could you kindly review this and let me know your findings? I’d greatly appreciate your assistance.

Thank you very much.

 

Downloadlink for bendtable:  Bend table issue

[Atharv Joshi]

Hi Benjamin, 

As per the forum guidelines we cannot download the files.

Can you please share the screenshots and details? Current images seem to be missing. 

Thanks and Regards
Atharv

[a.milano]

Good morning Atharv, 

Here's the screenshot of the CSV 



Here's the text of the same CSV in case you wish to copy it over

Version,2,
Type,BendDeductionTangent,
Units,mm,

,,
Thickness,0.7,
AngleValues,,180
Radius,0.2,0
,,
Thickness,0.7,
AngleValues,,90
Radius,1,1.325
,,
Thickness,0.7,
AngleValues,,90
Radius,2,2.65
,,
Thickness,0.7,
AngleValues,,180
Radius,5.8,7
,,
Thickness,0.8,
AngleValues,,180
Radius,0.2,0
,,
Thickness,0.8,
AngleValues,,90
Radius,0.8,1.4
,,
Thickness,0.8,
AngleValues,,90
Radius,1,1.500
,,
Thickness,0.8,
AngleValues,,90
Radius,3,4.5
,,
Thickness,1,
AngleValues,,90
Radius,1,1.8
,,
Thickness,1,
AngleValues,,180
Radius,1,0
,,
Thickness,1.2,
AngleValues,,90
Radius,1.2,2
,,
Thickness,1.5,
AngleValues,,90
Radius,1.5,2.5
,,
Thickness,2,
AngleValues,,90
Radius,2,3.5
,,
Thickness,2.5,
AngleValues,,90
Radius,2.5,4.2
,,
Thickness,3,
AngleValues,,90
Radius,3,5.2
,,
,,
Thickness,4,
AngleValues,,90
Radius,4,7
,,
Thickness,4,
VeeDieWidth,20,
AngleValues,,90
Radius,4,6.8
,,
Thickness,5,
AngleValues,,90
Radius,5,8.75
,,
Thickness,5,
VeeDieWidth,25,
AngleValues,,90
Radius,5,8.65
,,
Thickness,6,
AngleValues,,90
Radius,6,10.5
,,
Thickness,8,
AngleValues,,90
Radius,8,14.5
,,
Thickness,8,
VeeDieWidth,40,
AngleValues,,90
Radius,8,14.0
,,
Thickness,10,
AngleValues,,90
Radius,10,17.4
,,
Thickness,12,
AngleValues,,90
Radius,12,22.4
,,
Thickness,15,
AngleValues,,90
Radius,15,25.5

[Atharv Joshi]

Thanks for the infromation, let me check and get back to you. 

Regards
Atharv

[a.milano]

Just following up on the message you sent on February 6, where you mentioned you'd check and get back to me. As it's now April 14, I wanted to see if you've had a chance to review and if there's any feedback or updates you can share.

Looking forward to hearing from you.

Andrea

[Atharv Joshi]

Hi Andrea,

 

The bend deduction should be 1.4mm using the following formula and the given detail. (Thickness- 0.8mm, Bending Radius- 0.8mm, Angle - 90degree) Here K-factor is 0.41

What's the source for this bending table data that you have shared?

Bending allowance affects the bend deduction value which depends on material, K-factor, bending angle. 

You can try bend deduction online calcultors to check this.

 

Regards

Atharv