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Drill tip

If you are talking about this drill tip :


View attachment 3346


Then that drill tip is created automatically for standard holes (metric, imperial).


For straight holes it's not created.


What you can do :


1. create a hole sketched and there you can show the tip.


2. you can create a protrusion/revolve/cut
 
Seanaarchr,


Can you provide more info. I'm not sure if you want what Vlad has shown above or if you want to model an actual drill bit.


Kev


PS A picture would be nice
 
Didn't you asked this in the first post?


Please make a hand sketch or a paint sketch or something, or post a picture, to understand betterwhat do you want.
smiley2.gif
 
seanaarchr,

Try this and see if it works for you:

Draw the drill bit using a helical sweep. Then trim off the tip with a cut at the angle you want the drill tip to be. The shape of that would be an angled side revolved section that cuts the shape. You can also make the helical sweep have a hook at the end where the tip would be so it better matches the cut.

cheers,

M
 
seanaarchr


If you want a straight forward drill bit then you need one command. Revolve. If you imagine a cross section of the drill bit without the drill threads on it, the cut the sction in half along the long axis of the bit and revolve this around the bit centre you will have your drill bit see image.


Paddy


View attachment 3353
 
I believe seanaarchr wants to model a drill with twin fluted and a point angle of 118 deg with tip relief (a spiral relief) for cutting.


Please confirm.
 
Drill geometry is not a simple thing. If you are just modeling a simple representation of a drill, then the tip of your drill model will only require a cone (with your point angle), which can be part oftherevolvefeature, ora pair of rotational blendcuts for the front clearance (or flank)surfaces. This totals only two to three features for the entire model.


If you are modeling an actualdrill to be manufactured (and that will actuallydrill something), then you will have to model many features including a web thin, corner chamfers, lands, etc. Such a model may require dozens of features. There are many approaches and schools of thought on how to design drill cutting geometry. Geometries may be general purpose or optimized for cutting particular materials.
 
If you are just creating a simple representation, all you have to do is make a rotational blend for the front clearance (or flank)and then copy it to the other side.


If you are modeling a real drill, you will have to determine what type of geometry you want it to have (helical point, racon point, etc.). You can then model the point accordingly.


The image you posted is not clear enough to determine what you are trying to do.
 
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