How to make internal sharp corners with Vbit-Chamber mill?

[Anonymous]

Hey guys,

I got stuck with a problem in fusion in cam, I am trying to do a pocket  with end mill and with a a v-bit-chamber mill 45 degree(side angle-the whale angle is 90 degree). something like the image, I need to make internal sharp cornersl Like the image below, but I couldn't figure out how to do that. this was easy with other primitive softwares to do, is that something I can do with fusion 360? I try this with engrave but didnt work.

[engineguy]

@Anonymous 

I assume you are looking for what is usually termed as "V Carve" strategy where the V tool will rise at the corner so it doesn`t create a radius, if so then unfortunately as far as I am aware that toolpath strategy is not currently available in Fusion 360.

Sorry to be the bearer of bad news

Regards

Rob

[Anonymous]

What? Even a primitive software can do that!!!! very bad

[engineguy]

@Anonymous 

Agreed, not the best, but I think it is on the way soon 🙂

Anyway, what I did in the meantime for a "workaround" was to use the "Trace" option under the 2D menu and with a little work it can be done, not ideal but pretty close for now !!

Attached is a sample of what can be done with the "workaround", see image below, might be worth the effort for you but I wouldn`t know about that!!

My attempt at a V Carve solution

P.S. I had to create the V tool using the "Taper Tool" option as the "Chamfer" and "Spot Drill" tools that already had a V shape were declined as "invalid tool" for the toolpath

Regards

Rob

[g-andresen]

Hi,

That´s not done by v-carving!

To do this you need more than a 3 axis machine, as you can see here.

günther

[engineguy]

@g-andresen 

That only applies for a situation where there is a need to make vertical sharp corners, where there is an angle as in the example I created and in the @Anonymous  photos it is easily done with a 3 Axis machine, yes I agree it won`t do the short vertical corners but that is up to the original Poster just how small a radius he can accept for his job, "rest machining" with a very small cutter will produce acceptable results for most jobs, up to the user to decide

Regards

Rob

[daniel_lyall]

Fusion does have Vcarve It is the engrave operation and it works very well if the angle is the same as the tool it does a way better job then the other programs I use.

All is needed is a continuous toolpath 

[engineguy · Accepted solution]

@daniel_lyall 

Well, thank you Daniel, took me a few tries to get the correct selection but I am very happy to sit corrected on this one, it does indeed work OK

Only one very small point I could raise was that on my model the toolpath defaulted to "conventional" milling and to get it to "climb" I had to use the tool orientation and flip the X axis then it ran in "climb" without issue. Might be something to do with my model but it worked.

There is probably an easier/better way to get it to "climb" but it didn`t jump out at me so if there is another way please enlighten us

Attached for interest is my updated file.

Regards

Rob

[daniel_lyall]

Not that I know off I checked the other programs I have they don't have direction control. 

[Anonymous]

How?I try using the engrave with the same angle as the tool but didnt raise to the top in the corners, which what I need, a sharp internal corners like the image

[engineguy · Accepted solution]

@Anonymous 

Hi, did you open the last file I uploaded?

It shows how it is done, just select the top edge and the tool will follow the profile shape and go up and down the corners.

I am not at my PC for a few days, just on my phone so not able to do anymore images/file uploads for you.

Regards

Rob

[Anonymous]

Hey, sorry for the late respond, I sumbitted it before but somehow it didnt show in the forum, I tried open the file but it is empty there!!!!??

[engineguy · Accepted solution]

@Anonymous 

Hmmm, odd, I have just downloaded the file and it opens fine in Fusion so I don`t know what the issue is, must be something at your end ??

Anyway, here it is again attached below  re-named.

Regards

Rob

[Anonymous]

It is working now, thank you a lot for your help

[engineguy]

@Anonymous 

You are welcome, I am glad you now have it sorted and my apologies for my early post saying it couldn`t be done but thanks to @daniel_lyall  we both found it could

Regards

Rob