3D Pocketing(I think) on Rim question/help

[Novahawk13]

Doing a small project for school. We just got a new cnc machine and have some spare aluminum lying around (5in x 5in x 7/8in). Decided to make a miniature car rim, at least the face of it. Anyways, I've been messing aroudn with toolpaths and have had some luck with it but not much, its too choppy. We only have access to a 1/4inch Bullnose and a 1/4 and 1/2 inch Flat Endmills. If you can, take a look at my file and see if I did good or if I should change the toolpaths. The file is on the ftp , "school_rim.zip", inside is the MC9 file and STL file. I've tried using a Flowline tool path but it won't let me create it, says that the toolpath intersects. Any help is appreciated.

 

Thanks!!!

Ryan

[Jack Neelands™]

Welcome to the forum Novahawk

There is a zip file in the Mc9 ftp site called School that you might want to take a look at.

It has a few modifications to what you have stipulated for tools and might be of some help

Good luck

[BernieT]

Welcome to the forum!!

 

You really need some ball mills in your box too. Look on ebay, it's amazing how cheap you can buy a few decent end mills.

 

Keep practicing, you have made a good start!! Good luck!!

[Guest]

I agrre with Bernie on that part and ball endmills, I no longer have V9 installed so I only looked at it but I would think a couple of those would be necessary to really get it done right.

 

Great start so for.

[Novahawk13]

Wow thanks for the quick response!!!

 

What type of tool woudl you recommend for standard aluminum work. Carbide, HSS, etc.

 

Thanks,

Ryan

[Guest]

For aluminum, carbide 3 flute, if unavailable, carbide 2 flute.

 

I only use 4 flute in aluminum if I can not get or do not have on hand the other 2.

 

If this is only a school project and you are not pushing it hard you could likely get away with a 2 flute HSS ball mill

[Novahawk13]

So I was a little misinformed, we do have a ball mill--1/8inch. The tools we have are 1/4" and 1/2" end mill--both HSS, and a 1/8" ball mill--Carbide.

 

Take a look at my file and see if i did this all right. Also, check the feed rates, i based them off the school.mc9 file so i hope they're correct. The material for the stock is 6061 Aluminum.

 

The file name is School_rim_B.zip I've included the STL file for the underside as well.

 

 

Thanks,

Ryan

[mayday]

feed and speed are based on what your equipment can handle. dont over do it with small tooling that you say you have or you wont have any left take it slow with a .001 to .002 per tooth chip load to start and easy on the depth cuts. stage your roughing to finishing. larger to smaller with gradual stock remaning

[muchachomalo87]

Hi at my school we use 200 sfm and .01 cpt with a hss on 6061. Works like a charm. It is very conservative though. You could double hte sfm and be on the conservative side. most of your feedrates will be around 15ipm.

 

Also what kind of cnc does your school have?