Modelling a Drill Bit with a Compound Swept Cut

Modelling a Drill Bit with a Compound Swept Cut

in SolidWorks May 31, 2017

Can you model a drill bit? Picturing a drill bit you might be inclined to give a resounding yes… but not so fast; what about those organic compound cuts that neatly taper off, how do you tackle these in the geometric favouring CAD world?

It starts like this… create a solid body to represent your cutting tool and position it at the start of your compound curve.

Here’s the trickier bit… Think about what a compound curve is. It’s a curve which bends in two planer directions at once, whilst this sounds like the plot to a CAD horror movie the SOLIDWORKS projected curve actually makes it very easy.

Here’s how: Create your curves on two separate planes, in my example below you can see these as sketch lines. The blue line is my projected curve (found under Features/Curves/Projected Curves). The intention here is to use the resulting projected curve as the path whilst the solid body forms our profile.

Finally, use a swept cut to form the cut. A circular pattern can also be used in the case of a drill bit to give us the multiples instances usually seen around the head of a drill bit.

And there you have it! The projected curve tool is a great utility for lots of applications, it’s not limited to creating cuts, it can be used for sweeps and even creating the edges of complex compound surfaces. For this reason it stays firmly pinned on my SOLIDWORKS toolbar!

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