When designing parts in NX, one important thing to consider is that although there are many different ways to reach the same design, the order in which you do things can (but doesn’t always) affect your final design. For this blog post I have created a simple block that has been shelled, and has had the letters “NX 9” extruded in the side. I will show you how the order of the shell and the secondary extrude change the design.
For this first design, I added a shell to the box before creating the text. You can see that because of this step, the inside of the box is the same on all sides.
As you can see from the picture below, when I reorder the parts so that the letters were created before the shell was applied, the inside of the box has raised sections where the letters are. This is because the shell feature ensures there is the same wall thickness throughout the part.
Neither method is correct 100% of the time. Rather, you should consider the possibilities and consequences of the different methods and ensure that you always follow the proper procedure for the part you are designing.
-The Dream Team