Manifold internal draft and split line

[Abbadon]

Hi,


my first post so be gentle please!


I am currently working on a manifold internal for a prototype engine.


I have been having some difficulty in creating the split line as part of my geometry when creating my surfaces, and as such form the draft analysis shown below.


Currently I am forming the main runner using a series of sections as a swept blend, and the upward neck as another swept blend along a spline.


I need to control the surfaces better so that the split line runbs smoothly.


I would think that once I add a large radius to the part in that area the split line should ideally run over that rad also, which should occur if I get the underlying geometry iscorrect.


I would really like some suggestions as to different ways of creating the neck geometry other than a swept blend, or a way of translating the split from main runner to the sletches controlling that swept bend.


I have been running pro-e for about a year in anger, and am really still a learner in terms of surfaces and especially castings!

 

[rudresh.hm]

LHS portion look good, there is some -ve draft on the RHS portion.


for the neck: use boundary blend tool. before doing this, creat a curve along the parting line on either side. you may use these as 2nd direction curves and various c/s as1st direction. creat it as two halves and merge. another advantage of creating curve along parting line is that you can use these curvesin both the blends and this ensures these two halves merge without any problem.
Edited by: rudresh.hm

 

[Zaki]

parting line for such complex parts to be made by curve.