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GrahameWard1-Visitor
1-Visitor
October 18, 2011
Question

Sheet metal - k_factor

  • October 18, 2011
  • 2 replies
  • 6092 views

Does anyone know how I can write a relationship that will connect the bend allowance of a bend to the system parameter "SMT_K_FACTOR"? I can edit the definition of the bend and set the bend allowance to the SMT_K_FACTOR but it is not parametric, it is a one-time deal. If the change the SMT_K_FACTOR the bend does not update and I have to go in and edit the definition again.

2011-10-18__03.jpg


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2 replies

G
GrahameWard1-VisitorAuthor
1-Visitor
October 18, 2011

I'm doing this because we are trying to work out a bend allowance for acrylic sheet. If I use the standard bend allowance in a sheet metal part the flat pattern is too small for the bent part.

B
BrentDrysdale12-Amethyst
12-Amethyst
October 26, 2011

Hi Graham,

I could be wrong for the latest CREO 1.0 but till now I have never able to directly access that SMT_K_FACTOR system parameter with Relations. Great pity and something I argue for in the Sheetmetal TC. Long ago I wanted to have more than one K factor used in a familty table for a part.

The traditional way to do this is to use Bend Tables. If you have a look at the Help you should get enough to set up bend values for Acrylic based on your measurements.

Hope this helps.

Regards, Brent Drysdale

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RaphMORIN16-Pearl
16-Pearl
October 28, 2011

You must use bend tables. In my company we have bend tables for each material we use (aluminium, steel, copper....) We have defined for each material and for each thickness a bend allowance.

In fact, you have to affect a bend table to the material you use.

Material.JPG

In the bend table (2 entrie table : thickness and radius), you have to write the bend allowance. The radius is linked to the tools you use to bend the part.

Here's a screenshot of one of my bend table.

Bend_table.JPG

Once you have set all this, it's really cool, you just have to set the material, and bend radius, and the flat is automaticaly calculated.

Hope this helps.

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