oteast
Mechanical
- Mar 23, 2011
- 5
On UG/NX 7.5 which we lack any decent manual for (I checked all our local libraries and amazon for good third party guides; the former has nothing and latter all cover NX v2 or 3 or 4....).
What I am trying to do is place vanes from lofted x-section data points in a gas flow channel which is also for similar data. Have tried several approaches to get a clean part for our CFD folks but seem to get tripped up. (Part is attached in NX7.5 format tarballed).
Approach #1: Generate 2 revolved solids from two closed curves and subtract these from the vane (before grouping it and rotating to 22 instances). The problem is there seems to be no easy way to knock of the excess "sprue" inside and outside the gas flow path channel walls. Tried to knock off the outer sprue with a cylinder that is extruded up as a subtract tool, but the boolen does not allow it after grouping and instancing.
Approach #2: Generate 3 solids from three closed curves, one a slightly shifted in (0.01in) set of curves for intersecting with the vane. This works well, but I cannot seem to make the curves coincident and still revolve. Move them in about 0.01in, the minimum to get this approach to work and the final vane has little gaps between the ends and the flow channel walls, which I have no idea how to close.
Approach #3: Tried to copy by using revolving the two complex splines to a new datum 90 deg offset from the main gas flow path parts sketch, but can only seem to revolve them in the sketch plane.
Anyone have an idea on how to proceed on any/or all of these three spproaches (or another, better one)?
What I am trying to do is place vanes from lofted x-section data points in a gas flow channel which is also for similar data. Have tried several approaches to get a clean part for our CFD folks but seem to get tripped up. (Part is attached in NX7.5 format tarballed).
Approach #1: Generate 2 revolved solids from two closed curves and subtract these from the vane (before grouping it and rotating to 22 instances). The problem is there seems to be no easy way to knock of the excess "sprue" inside and outside the gas flow path channel walls. Tried to knock off the outer sprue with a cylinder that is extruded up as a subtract tool, but the boolen does not allow it after grouping and instancing.
Approach #2: Generate 3 solids from three closed curves, one a slightly shifted in (0.01in) set of curves for intersecting with the vane. This works well, but I cannot seem to make the curves coincident and still revolve. Move them in about 0.01in, the minimum to get this approach to work and the final vane has little gaps between the ends and the flow channel walls, which I have no idea how to close.
Approach #3: Tried to copy by using revolving the two complex splines to a new datum 90 deg offset from the main gas flow path parts sketch, but can only seem to revolve them in the sketch plane.
Anyone have an idea on how to proceed on any/or all of these three spproaches (or another, better one)?
