Help 4 axis part

[Anonymous]

Hello,

I would like a machining suggestion for this attached part, it will be of great value, please help me, I need to move forward in this programming.

Hug

[ChristopherMarion · Accepted solution]

Hi @Anonymous 

I think the Rotary strategy that is available in the surface milling options is the way to go.  I've attached a sample for you to look at.  Only semi-finish and finishing.

For roughing, there is no 4th axis roughing option available, so I would index say A0, A90 A180 & A270 and rough from each side to get as much material out as possible, then use the rotary to bring the part to net zero.

Let us know if we can help any further.

Cheers,

[gregorANU4T]

That kind of geometry is much more effectively machined with wrapped 2d features.

Extract the curves at the top edges of the auger, unwrap them, close the ends however you see fit so you can create a pocket feature, define the auger blade profile and select it in the X-Section of the pocket feature, select wrap around X. Nothing then but to choose your tools and go.

[ChristopherMarion]

@gregorANU4T 

Yeah, I agree in most cases wrapping is a great option.  In this case, I don't think the walls are truly vertical and have a strange radial surface with a varying radius at the bottom.  It would surely gouge the part if you finish wrap with a pocket feature.  You would need to use a 40mm ball or a bullnose with a 20mm tip to get close to the final shape.

I think a wrapped pocket may be a good option for roughing the material out between the spiral regions and is something that @Anonymous could look into with your suggestion.  Rotary in my mind is still a better option for finishing. 

At least there are options, so if one does not yield good results, there is another to try.

Thanks,

[gregorANU4T · Accepted solution]

Hi Chris, 

Actually, the walls are parallel, it's just a trick of the eye they way the blade is terminated on the ends!

If you cross section at centreline, and extract that curve, and use it to drive the cross section of the wrapped pocket, then you can finish that geometry complete in a single feature. When you set a cross section curve, FC then gives you the same wall/floor options that you get if you have a draft angle set, so you can choose radius mills or whatever you like to fully machine the profile, all wrapped around the axis.

For some reason I am not able to upload pictures today, but you can see here https://imgur.com/hDO0Cu4

[ChristopherMarion]

@gregorANU4T 

Got it.  Yeah the model is a bit misleading at the ends.  Plus my graphics do not look as smooth as what your image is representing.  Probably why I misread the model.  Thanks for pointing that out.

It looks like @Anonymous  has some options here!

Thanks,

[Anonymous]

Hello, Thank you very much for the suggestions you were analyzing reproducing, advancing the programming, checking the best way to do the process. Thank you friends

Hugs

[Anonymous]

Hello, Thank you very much for the suggestions you were analyzing reproducing, advancing the programming, checking the best way to do the process. Thank you friends Hug