pattern an edge flang feature?

I have a sheet metal part, a grill for a fridge, that has 53 fins laser cut
in the flat and then bent to 45 deg. I put a cut in and then an edge flange
to the approp. dims. how can I speed up the flange process? I cant pattern
or copy the feature. also I have to edit the flange sketch to make the laser
cut width and fillet the sketch corners after I put the feature in. I really
don't want to do this 53 times if I don't have to. TIA.

 

do your part the old way, thin-features, then apply sheetmetal feature

 

Recently I had a similar task. After having the same problem (58
instances)I made the outline as you did, pattern it as you did, make
it sheet metal as you did. But rather than Edge Flange. I used Sketch
Bend (Pick a surface, open sketch, draw a line where you want the
bend)with Tools/Sketch Tools/ Linear Step And Repeat. The step and
repeat needed a dimension added afterwards to fully restrain the
sketch. My form needed two bends. If both bends were in the same
direction and angle they could have been done in the the same Sketch
Bend. I need one bend to be opposite. So, I needed two Sketch Bends.

Rebuilds take a long time. But it works.