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Draft direction and Neutral Plane
andreas_scholz
Member Posts: 14 ✭
Hello to all,
I wanted to create a part which is 22° orientated to the draft direction. When I select a neutral plane the draft will be done normal to that plane? What about the case I want to select a neutral surface that is not planar?
To make it a little bit more clear, please have a look at following simple example:
https://cad.onshape.com/documents/b962676889c09f0d0bc6289d/w/51621f26a0d37db7347e9962/e/254f7c88e261e2fecd5ed4a1
It is only one feature of a small plastic part I wanted to create last week. As You see the part is extruded between to parallel planes with an angle of 22° degrees to the top plane. The part should have a draft of 0.5° normal to the top plane (see direction arrow) as main draft direction (there are additional features that call for this direction!) with the upper plane as neutral plane. I am not able to draft the part in Onshape in that manner.
What if the upper surface would not be planar and also should be the neutral surface for draft?
I am primarily working for automotive industry where draft directions are often set, and adjacent surfaces or parting (neutral) elements for drafts are non planar.
Thanks in advance for answering.
Regards
Andreas
I wanted to create a part which is 22° orientated to the draft direction. When I select a neutral plane the draft will be done normal to that plane? What about the case I want to select a neutral surface that is not planar?
To make it a little bit more clear, please have a look at following simple example:
https://cad.onshape.com/documents/b962676889c09f0d0bc6289d/w/51621f26a0d37db7347e9962/e/254f7c88e261e2fecd5ed4a1
It is only one feature of a small plastic part I wanted to create last week. As You see the part is extruded between to parallel planes with an angle of 22° degrees to the top plane. The part should have a draft of 0.5° normal to the top plane (see direction arrow) as main draft direction (there are additional features that call for this direction!) with the upper plane as neutral plane. I am not able to draft the part in Onshape in that manner.
What if the upper surface would not be planar and also should be the neutral surface for draft?
I am primarily working for automotive industry where draft directions are often set, and adjacent surfaces or parting (neutral) elements for drafts are non planar.
Thanks in advance for answering.
Regards
Andreas
Tagged:
2
Answers
Otherwise you could extrude a part in the draft direction (with draft angle)
then use the planes to cut away the area above and below. Using split, then delete the leftovers
It was the most common method to make features in injection moulded components, especially since during the development phase you create geometry off of main surfaces (not necessarily in die direction), with 0 draft while planning out the part, then once you have locked down the overall design you start drafting the key features.