Control of thread start
Control of thread start
(OP)
Using the Insert/Design Feature/Threads, is it possible to control the starting point of where the thread cuts into a part?
I wasn't successful using the Extend Thru Start option since the start of my thread didn't cut thru the end of the part. I ended up creating a datum plane offset from the part equal to the thread pitch and using that as the start plane since one revolution should have put me right back to edge of the part. However, it seems like the start is a few degrees off where I expected.
Using NX6.0.5.3
Thanks...
I wasn't successful using the Extend Thru Start option since the start of my thread didn't cut thru the end of the part. I ended up creating a datum plane offset from the part equal to the thread pitch and using that as the start plane since one revolution should have put me right back to edge of the part. However, it seems like the start is a few degrees off where I expected.
Using NX6.0.5.3
Thanks...
--
Fighter Pilot
Manufacturing Engineer





RE: Control of thread start
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
http://www.siemens.com/plm
UG/NX Museum: http://www.plmworld.org/p/cm/ld/fid=209
To an Engineer, the glass is twice as big as it needs to be.
RE: Control of thread start
Image below.
Part OD: 4.50"
Part width: .50"
Internal thd: 3.5-12 UN
There are other features to add but they are really dependent upon the location of the thread start. I'd like it to start at the 6 o'clock position but at this point in the part construction it doesn't really matter. I can put a point at what appears to be the thread start but it never ends up where I expect it.
--
Fighter Pilot
Manufacturing Engineer
RE: Control of thread start
--
Fighter Pilot
Manufacturing Engineer
RE: Control of thread start
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
http://www.siemens.com/plm
UG/NX Museum: http://www.plmworld.org/p/cm/ld/fid=209
To an Engineer, the glass is twice as big as it needs to be.
RE: Control of thread start
I think I can get the 'run-out' at each end I've been using a datum plane spaced off one pitch length from my actual part as the starting surface of my thread. Then, I make the thread length the part width plus two pitch lengths.
What I show is not the best example because there are no other orienting features. I just want to know how to control the point (the angle) at which the thread enters the parts. I think I know how UG does it but what ends up in my part is not what I expect.
--
Fighter Pilot
Manufacturing Engineer
RE: Control of thread start
Wild guess here: try moving your starting surface a quarter pitch length and see if the thread starts 90° away from where it used to start.
NX 7.5.5.4 with Teamcenter 8 on win7 64
Intel Xeon @3.2GHz
8GB RAM
Nvidia Quadro 2000
RE: Control of thread start
RE: Control of thread start
I had thought it might come down to that hoping i would get full control of it. I'll have to look back at my modeling books to figure out how to create that feature.
thanks...
--
Fighter Pilot
Manufacturing Engineer