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IronCAD vs Fusion 360 Lesson 15
3D Modeling Techniques Defined
Streamlined Sketching/Feature Based Modeling

This part that is so simple it strains credulity to watch this fellow struggle with it. He takes the drawing and starts creating features that just don't make sense. He doesn't evaluate the features that make up the part. I can tell you being in a "Constrain Sketching Only" box is an incredibly limited and time consuming process.

First watch the Video.

Fusion 360 Monthly Challenge June 2018




Here is the drawing.



Lets take a look at this part. First we want to see the basic feature. Not all parts are this simple. We can see a block. With a little arithmetic we can see it is 4.00x1.50x1.50. That will be the first feature we make and continue from there. We can see that the cutout is 2.35x.50. Those are the only created features the others are four .75 blends and two holes.

I have debated with a few about constrained sketching and when the part goes to CNC it is a dumb part. The only way you define relationships is detailing the part in the AID (Associated Information Document).

We are already in inches so let get started.

We drag and drop a block from the standard catalog and size it.



Now we add the blends since they are both the same we do them all in one step. For the life of me I cannot understand why the "constrain sketching only" crowd insists on sketching fillets.



Now for the cut. I did the fillets before the cut do eliminate a step. I drag and drop and hole block on the front face and size it.



Now for the two holes. We drag and drop two hole cylinders on to the relevant faces and size them. IronCAD automatically recognizes center, mid-points and corners.



There you go. No sketching, just feature based modeling design with shapes at its best. As you can see I have hidden the catalog. You usually operate it in an autohide mode to give you more design real estate.



I know, I know, not all of you have intellishapes to design, in fact probably none of you. So let's do it with sketches to show you Streamlined Sketching using the same idea of looking at the part and seeing the basic shapes.

When you design in IronCAD you usually start by dragging and dropping Intellshapes from the catalog, then you may use streamlined sketches or the integrated direct editing. They are all available in your design process. Think of the design flexibility this offers.

We open a new part.

We select Extrude Wizard (one of the more used function) it is automatically set to create a standalone part and we set the depth to 1.50.



It will come up with a sketching plane. I usually set to ISO view to work with the sketch. Now for our first sketch. We select rectangle and with the right button sketch it with two corners. This will bring up a dialog box to put in the length and width.



We select finish and we have our block. Remember we set the height of 1.50 in the first setting of the extrude wizard.



We now put in the .75 blends now to eliminate a step.



Again we go to the Extrude Wizard and place it on the front face and set the depth to 1.5 and select remove material.



We create the rectangle. No constrained dimensions. Just a few projected edges, offsets and trims.



We select finish and our extrusion cut is complete in one step.



As above I would usually just drag a few hole cylinders but with this exercise I will again use the extrude wizard. I select center radius and it automatically recognized the center of the arc and allows me to set the radius.



I select okay and select finish and hole is made. No constrained dimensions. You can see that this is not an intellishape since it has two little handles on each end. It would have to be edited with the sketch or direct editing. The intellishape has side handles to set the diameter.



We are done. Just so much faster and easier. I do this to show that you do not have to suffer through the constrained sketching in your own system. Yes, there may be a time you may do some parametric design and constrained sketching may be required but I have only used parametrics once in all the years since I have had it available in 1998.



Now to detail the part. If you are actively converting drawings to models you have to detail them again. I was consulted on a complex part and after a short review of the drawing and part I saw that the fellow had made some blatant errors. Detailing is a very quick way of checking the part. Yes, time consuming, but not as time consuming as finding the part doesn't fit.

I am not a believer in the isometric representations shown in the drawing. If you cannot read a conventional AID (drawing), you should not be in engineering.

IronCAD has a separate AID module that is tied to the single model environment . So you can have parts and assemblies mixed on the same AID file.

It comes up and I set the views I need.



With that done I proceed to detail the part.



It is very important that you look into how you or your engineers are creating parts. Streamline Sketching and Feature Based Modeling is easy to learn and implement. It, alone, can increase productivity 10X. Now, IronCAD with its unique history and robust direct edit functionality can increase your productivity another 5X or more with changes! Again, time is money in engineering.


More on Streamline Sketching and Feature Based Modeling.


3D Modeling Techniques Defined



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