Good book to learn feeds & speeds
Good book to learn feeds & speeds
(OP)
Can anyone recomend a good book that can really teach me about all I need to know about feeds and speeds for all sorts of machining,(milling,turning,boring, multiaxis, everything!) including the more exotic materials? (Titanium, Ni alloys, etc)
At the moment, for me, it's a process of relying on the advice of more experienced guys, (who more often than not contradict each other) and trial and error to get the results I need, or wading through Machinerys Handbook each time. I get the answers, but I don't know WHY.
There seems to be so much bullsh!t talked about this area, that I'm no longer sure what I need to know, and what is just irrelevant, and I never seem to get anywhere! I just want a book that tells me what I need to know.
(or failing that, a good website source!)
Any advice?
At the moment, for me, it's a process of relying on the advice of more experienced guys, (who more often than not contradict each other) and trial and error to get the results I need, or wading through Machinerys Handbook each time. I get the answers, but I don't know WHY.
There seems to be so much bullsh!t talked about this area, that I'm no longer sure what I need to know, and what is just irrelevant, and I never seem to get anywhere! I just want a book that tells me what I need to know.
(or failing that, a good website source!)
Any advice?





RE: Good book to learn feeds & speeds
RE: Good book to learn feeds & speeds
My lathe's manual, (a mori seiki) is pretty crap. I think it was translated directly from Japanese, and is amusing at least!
RE: Good book to learn feeds & speeds
I'm a Prod Eng, machining is not a problem, different techniques are not a problem, and I can program and set most types of machine tool, draw up planning, 3,4 and 5 axis milling, live tooling, the whole bit. No worries on manufacturing techniques at all, EXCEPT I've always had a bit of a blind spot when it comes to selecting feeds and speeds. I can get the results, but it always involves a bit of messing around during tool proving. I've never once just stuck a program in a machine, and not had to touch the feeds or speeds that I've programmed. It's a limitation, and it annoys me, and I'd like to teach myself the how and the why.
So, I can cut metal, no problem. I can get good results no worries, but I'd like to know whats going on at the insert. WHY does chaning the feed/speed get me better results?
I'd like a straigth forward explanation, without getting all bogged down in equations explaning the insert geometry and so on.
RE: Good book to learn feeds & speeds
RE: Good book to learn feeds & speeds
My solution was to use the center of the recommended range for new situations. As I became more experienced, I would favor one side or the other. I kept a log of what inserts or tools would work in what situation, so I had a good baseline. With some experience, I could make a good part with initial setings about 90% of the time. Then the job could either be run out with the initial settings (short run jobs), or the settings would be tuned for optium production (not always fastest cycle time) on production jobs. Then, when new jobs are slow, revisit old production jobs to see if they can be improved. The closer the job is tuned to the edge, the more succeptable it is to problems.
Always remember, if it was pure science, anyone could do it!
RE: Good book to learn feeds & speeds
RE: Good book to learn feeds & speeds
Keeping a 'diary' of what I've used and where is a good idea, I think I need to start one.
RE: Good book to learn feeds & speeds
And I've been looking at Makinos too...absoleutly mind bending machines.
Excessive accuaracy is a sign of poor breeding. -Socrates.
RE: Good book to learn feeds & speeds
I may be able to help you.
Speeds and Feeds for us like yourself was a bit of a bug bear. So myself and a team of other engineers collectively allocated time to create a speeds and feeds catalogue for use on our cnc turning machine shop.
It covers many exotic materials such as Inconel and Titanium as well as standard stainless such as S80 and MSRR6522.
Regards,
Gogsie.
RE: Good book to learn feeds & speeds
I have used their speeds and feeds charts for years. I no longer do the machining, now I make plastic prototypes, so it has been a while since I have used their handy slide rule charts. They worked great for me. Remember that NO MATTER where you get the information, it is always meant as a starting point. There ARE NO hard and fast exact speeds and feeds for ANY metal. The reason is because there are always going to be variables, no matter how perfect you think everything is.
Good luck!
RE: Good book to learn feeds & speeds
In other words...There ain't no easy answer, But trial and error has worked for years. If you follow the insert mfg's recomended starting points though you will reduce the error part of trial and error
Hope this sheds a little light on this
Jim
RE: Good book to learn feeds & speeds
ah well, they DO make nice paperweights.
Excessive accuaracy is a sign of poor breeding. -Socrates.
RE: Good book to learn feeds & speeds
I've written a free program aimed at people like you. It's in the beta stage right now, but is still pretty useful. You, or anyone else who needs speed/feed (and a lot more) information, take a look:
screenshot:
http://bellsouthpwp.net/r/s/rsnmar/MachiningBeta1.jpg
program:
http://bellsouthpwp.net/r/s/rsnmar/MachiningBeta1.zip
RE: Good book to learn feeds & speeds
Almost all points are covered and the highlights are (Excuse repetitions):
1. Recommendations are starting points from where we move in the desired direction*
2. Variables affecting the process should be understood:
Workpiece material, Tool material and coating on the tool, hot hardness of the tool, tool geometry, coolant, friction at the work-tool interface, temperature at the zone of cutting etc.
3. Rigidity of fixturing, horsepower available at the spindle.
Other considerations:
It may be noted that each of the variables like cutting speed, feed and depth of cut has a different impact on the tool life and prodcution rate. Keeping two variables constant (in turns) while varying the other parameter by say 50% will provide valuable data for entry into the DIARY (REMEMBER THE DIARY STARTED EARLIER?)
*Consequently, we can arrive at a range of parameters for a single job which would on the one end yield maximum tool life, and the other end, maximum productivity. The objective need not always be the same. The above data can be used to arrive at different parameters to obtain maximum tool life or maximum productivity or a balance between them.
Trust some summing up and another dimension has been presented.
Cheers
RE: Good book to learn feeds & speeds
We at Fokker Aerospace in Europe use for some years a simulation package called AdvantEdge from Third Wave Systems. Using this software you will see why and how cutters behave during machining.
Have a look at their website at www.thirdwavesys.com
Jan1