Machining type

[sml2010]

Hi to all


Can you please help me to know :

for finish a 3d surface, what type of machining should i use to have the best surface finish and accuracy(i use mastercam CAD/CAM software)?

I saw a video that used one way machining to finish the steel part and in another machining i saw that used zigzag tool movement.
I know that climb milling is good and i must use climb milling and one way tool movement in wall but can you please tell me what about in the bottom?

Can you please help me and tell me a book, article or .... that help me to know more about machining in 3d surface?


Thank you
Best Regard
S.Majid Lotfi

[mfgbydesign]

Generally start with constant Z roughing. Leave about .100 inches. Use a shell mill or large end mill.
Finishing? Anything goes that works. Different shapes call for different approaches. Avoid cutting with the end of a ball nose end mill. I rarely use parallel plane finishing, although that's a common technique and easy to program. I like to use radiused end mills, although sometimes a ball is necessary. Try to start at the bottom and work your way up; that way you're cutting with the side of the tool and minimize recutting chips.

[fishcat]

There is several factors when determining what tool path to use to obtain the best surface finish.Selecting the proper tool path, is just one of them,though the tool path you select can be important ,perhaps more important is what speed and feed rate you use ,you may need to slow things down a little.What material your cutting? what tools your using?coolant or not ?Some tooling manufactures,such as Iscar can give speeds and feeds for there tooling ,and I,m sure there are others.I use Master Cam Version-5 Climb milling were possible is always good,Take smaller step overs, and use a tighter tolerance.Scallop tool paths are good,surface contour, parallel,flowline,they all have there place, just depends on the shape of part your machining,sometimes its a combination of several different tool paths to obtain best finish.I dont know of any book that is a silver bullit for surface finishing,but I can tell you that trial and error is hard to replace, sometimes ,you gotta try different,tactics and just remember what works the best .Good luck,If you have a specific question about tool path or speed feed for material, I,ll help you if I can -Fishcat