Unable to cut/extrude a hole in sheet metal.

[Jaeger1787]

Hi folks.

I am creating the box shown here, using the Sheet Metal function.  There are three holes required in the fixed side of the box, indicated in blue.

These were initially created in the flat area in the first sketch.

When I finish the sketch, the smaller hole disappears.

My first thoughts were that somehow the small hole was sketched on the 'wrong' side of the plate.  Examining it seems to show it is on the same side/plane as the other holes. 

 I have spent about six hours looking at help pages and videos without solving the problem.  Where am I going wrong?  The file is attached.

Keith

[dsouzasujay]

Hi @Jaeger1787,

Below things which i have corrected in your attached design.

1. While creating the Flange 'Profile 2' has to be removed
   
2. Mirror the Hole Face, Instead of entire Body
   

[Jaeger1787]

Thank you, Sir.  However, I do not want to mirror the small hole, simply cut it. 

Can you explain a little more with regard to the two profiles?  How does that bear on the creation of the small hole, when in fact that is created in the initial sketch, before the flanges are pulled out.

[jhackney1972 · Accepted solution]

Take a look at my Screencast.  Try not to combine features, reuse the sketch for the holes to add them as a second feature.  You have to edit your first mirror to retain them but that is what you do in the second mirror anyway.  Model is attached.

[engineguy]

@Jaeger1787 

Hmm, is the image below what you are trying to achieve ?? If so then just cut the hole by extruding the small hole in the sketch, modified file attached, extrusion of the small hole is at the end of the timeline.

It is not clear why you did not get the three holes cut originally because there is nothing in the timeline that I can see where the holes were created.

[Jaeger1787]

Thank you, Sir.  I was able to follow your screencast, although I had to watch it a couple of times to catch the finer points.  Once I had worked out in my mind what you were doing, it worked a treat.  I must confess that I had watched a couple of videos (more than a couple) on t'net and had gained the impression that when one commenced the flange feature any extrusions were created at the same time from the relevant sketch.  In fact that is what happened with the larger holes, but the small hole refused to form.  Any way, all sorted, so thanks again.

Keith.

PS.  In order to follow screen casts more closely, I usually enlarge them to full screen size.  However this always cuts off the video timeline, so one can not navigate back and forwards without shrinking the screen.  Is there some setting that an be tweaked that will enlarge a screencast but retain the time line at the bottom of the screen?

[Jaeger1787]

The three holes were created in the initial sketch (No. 1). 

When I started the flange, the larger two holes were cut, but not the smaller one and I could not understand why.