how to create a trough all cut extrude normal to a curved surface using pattern ?

Can you attach your *.sldprt file here?

Hi Laurent,

If you convert this to a sheet metal part, you have the option to create a normal cut and also link it to the thickness.

Best,

Iain

This isn't a Sheet Metal Compatible design and would be made in a stamping process during manufacturing.  There is a chance that you could use the Swept Flange Feature, but you would need to leave a gap and a center hole...

If you create it as a surface model, add the holes, then "Thicken" the surface, the holes on the curved faces will be normal/perpendicular, but you will run into issues if they cross the edge -

todd

Laurent, I'm not sure if you can use this same approach but I tried what your asking for using the "Wrap" feature and it seems to do what you want ...

Holes on a flat plane (Not normal to the surface)

Same sketch used, but used the "Wrap" feature instead with a Deboss to extrude through the material ... (Holes end up normal to the surface)