Help Me Surfacing

[m98custom1212]

Part in question:

 

Material-D2

One Piece!

Needs to done ASAP

Will be turned before milling.

We don't have the material yet so I have some time to play around with the toolpaths

 

 

 

Mastercam says 30hr + cycle time 

 

I want some tips on my approach and feeds/speeds

 

I normally don't do surfacing (mill-turn mainly) but I switched jobs recently. Any surfacing I did was on small parts so cycle was never any issue even if I didn't use the most efficient tool path. 

 

 Mastercam is fairly new to me

 

 

Notes- R 3/16 in the bottom that why I choose a 3/8 ball  

 

Part is attached (Mastercam X8)

Part in Question.mcx-8

[Guest]

My god, the size of that, get a feedmill in the and go to town

 

D2 isn;t bad at all

[m98custom1212]

No feedmill

 

No time get one either with all holidays coming up but I will try 

[Guest]

Seriously, a job that big, you need the proper tooling or it's going to take what it takes

 

I don't mean that in a hard way it's just the reality, I could rough that in under and hour with a feedmill

 

I may have a redundant tool path here, but you'll get the idea

 

A little over 2 hours

 

 

The feedmiill will pay for itself in time savings, most places stock them and can ship Next Day

I recommend

 

https://www.mitsubishicarbide.com/mmus/catalog/pdf/b/b028a.pdf

[BenK]

Change your rough path to an Optirough and a flat endmill. You will save a lot of time. 

[m98custom1212]

Do you think a 2inch high feed would be to big?

[Guest]

Do you think a 2inch high feed would be to big?

 

It'll work but with the larger size you'll have more materiel on the bottom that it can't reach, you may have to add an additional tool to smooth thing s bit more before going for finish

 

I Just laid it out, you'd have an extra .03" in the bottom of the basin to deal with

[The Cathedral]

Change your rough path to an Optirough and a flat endmill. You will save a lot of time. 

 

+1.

 

I'd drill a blind hole in the middle and use that as my entry point. Then I'd opti-rough with an endmill with a corner radius on it; set your step-up to the size of the radius. Then finish with a ball.

[m98custom1212]

I can't find the option to use the drill hole as a entry point. 

 

I dont see Optirough either just opti-area, opti-core, opti-rest. I assume you mean opti-area?

[JayM]

Here is another way of roughing out this type of profile.  Once you have the slot roughed in, the nice thing about stepping along the shape to rough it is that the cut is very consistent and it uses the side of the endmill.

Part in Question-ALT.mcx-8

[m98custom1212]

Here is another way of roughing out this type of profile.  Once you have the slot roughed in, the nice thing about stepping along the shape to rough it is that the cut is very consistent and it uses the side of the endmill.

Would the endmill last cutting the "slot"

[JayM]

Take small steps, lots of flood and it should get through it. 

[Colin Gilchrist]

Here is my take on it.

 

Looks like about 2.5 hours. 1 hour to rough, 1.5 hours to finish.

 

I roughed it with the .500 endmill with the .03 CR. Then finished with the .375 ball. I used the HST Project to semi-finish and finish the walls, before finishing the top radii and the floor. That should help give you a nice finish on the walls, and prevent the Raster finish path from gouging on the walls.

 

Hope that helps,

 

Colin

 

 

 

 

Part in Question_CG.mcx-8