how to profile a bowl cavity?

[Jimic]

Can someone give me advise how to mill a cavity like half of a bowl.

8.00 dia and 4.00" deep.

Material: 4140- kind of hard stuff.

 

I don't have much experience in profiling. using MasterCamX. level-2.

I was thinking to rough it out using 1" carbide insert endmill, then rough profile with 5/8 car, ballnose, and finish with 1/2' ballnose.

 

Question:

 

Do I use flowline for roughing and finishing ?

how much material leave for finishing and the value of the stepover?

 

 

Any other suggestionare appreciated.

thanks.

[DavidB]

I'm not 100% sure what you can and can't do with Level 2 but surface finish scallop would be my choice for the finish toolpath.

 

Surafce finish rough pocket spiral for roughing, and surface finish Parallel for semi finishing, or surface finish contour and a shallow toolpath.

 

Or if you have a Lathe?

 

I would use Larger tooling say 2"Dia round inserted tipped tool for roughing.

 

 

Use the 5/8 ballnose for finishing, the 1/2"dia just means a longer cycle time.

[Keith @ Solid Code Solutions]

quote:

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I'm not 100% sure what you can and can't do with Level 2

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Single surface selection only as opposed to multiple surface selection in Level 3. All of the toolpathes in L3 are available to you in L2.

[DavidB]

Can't the Bowl be 1 surface? Surface revolve or sweep!

[Guest]

It could be depending on its shape and how it is actually created

[Hardmill]

quote:

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It could be depending on its shape and how it is actually created

quote:

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8.00 dia and 4.00" deep.

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Yeah level 2 should work fine.

surf-rough-pocket will remove alot of the

material, parallel to get to the bottom.

Flowline ought to work for a fin. path.

 

 

PEACE

[Mcam Nut]

goldfish,

If you are still having problems you can put it on the ftp, or send me a e-mail, and I will help you out. I would use a large inserted endmill, to rough it out, and we actully use a 3/4 inserted ball to finish our surfaces in stainless, we don't cut any 4140 at all. If you cant get a inserted ball nose, the sc should work out good

[edmBosto]

I used to like the using the finish flowline whenever I could also as the stepover was consistant on the contoured surfaces and the tpath generation was fast. Scallop is great when needed but takes up a lot of memory.

To rough I also agree with everyone that Surface

Rough Pocket is the way to go.

Cheers

[Mcam Nut]

You got mail jim

[Todd Tracey from Fastech]

Level 2 in Version X does have a couple of multiple surface toolpaths available. If it is only 1 surface, depanding on how the geometry was created, then you can use the toolpaths suggested above.

HTH

[Mcam Nut]

I used surface rough pocket, and surface finish flowline for this file. Seemed to work out good, and I believe that you can do these toolpaths in level 2, not 100% sure about that though. Did you get the file yet jim?

[Keith @ Solid Code Solutions]

Jimi,

 

You have mail.

[New Job]

Is this a true bowl shape? We do cavities very similar to bowls in our headrest tooling. Use surface rough pocket and surface finish scallop very effectively. Running in 6061AL, but we run a lot of 4140 in other parts. In AL I could do this cavity in about a half day depending on shape.