Guys I need some help
I’m a student attempting to set up NX manufacturing for our plants tool room. We have 2 haas lathes, and 2 mori-seiki (one mill but we’ll deal with that later ;P). I’ve figured out the software for the most part, and have started my venture into post building for these machines.
Many of our machinists are afraid to use the software, or unfamiliar with the techniques NX uses to program. I’m working on a post processor to change cutter compensation from I & K to R, diametric coordinates, and adding other program necessities that they see such as spindle gearing etc.
While I may need some help with the posts in the future, I can’t seem to figure out how to part off a lathe part.
For example, if I cut the O.D. , and face the part, how can I flip the profile around (cutting the other features) to show what has already been machined?
I haven’t found a way to do this yet, and my only thought so far is to just create another program for the back face from scratch.
I'm not sure what you want to do: are you just wanting a simple part-off, or are you transferring the part to a sub-spindle for secondary machining?Originally Posted by btmasta
What version of NX are you using?
If you are current on your maintenance, you can visit the GTAC web forums. There are lots of experts there that can help.
Running 7.5
I want to flip the part around in the spindle, while keeping the machined profile.
Machinists currently run program, hit optional stop once done with the front features, flip part around in chuck, and run the rest of the program.
I will look into the GTAC forums, thanks for your help.
*Edit* you need a webkey account for the forums? Stupid corporate IT won't let me have access to one
Last edited by btmasta; 05-16-2012 at 09:21 AM.
You are in luck. In NX 7.5, there is an option to grab the In-Process Workpiece (IPW), and transfer it to a new position. I have used it to move the work to a sub-spindle, but you should be able to use it to flip the part around. Do this in the Geometry View of the Operation Navigator. Create a 2nd MCS and Workpiece. For the Blank geometry in the 2nd Workpiece you will use "From Workspace".
You can use the same Program in the Program Order View. Make sure you add an optional stop before the part flip.
How do I flip it around? I can't seem to find the option to move the IPW, just show it...
OK, after thinking about that more, that idea won't work. If you turn the part around for the secondary machining, it will also be backwards for the primary.
I think you will have to add the part as another component to the assembly. Then you can create a second MCS/Workpiece for the secondary machining, still using the same Program.
That sounds like it would work.
My machinists are tearing me apart right now saying they don't want to use this program.
The currently used a g71 canned roughing cycle, which I believe NX doesn't support. So the code from NX is about 4 times as long...not a big deal since it should be doing the same thing. From my understanding I could add an UDE to create a canned cycle? This is probably more work than I have time for (I'm a co-op and only have 1.5 months left before school) but I would like to know if it's possible.
Another question is during the retract move during roughing I'd like to make the machine rapid back, then feed regularly into the cut. Right now it's not doing that and I can't figure it out. This should be in the manufacturing program and not within my post correct?
I found the "retract" feedrate option, and while it changes the feedrate in the code, it doesn't seem to change anything in the "verify tool path"
So if my cut feedrate is .015"/rev , and my retract is .25"/rev they seem to be moving the same speed in the simulation? Is this correct? I've tried changing them to IPM but it doesn't change anything
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