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Re: Made my model parametric, but missed the blueprints I started from
a lotta work is relative. when first learning everything is a lotta work. Then you know how to do it and often find better ways to do the same things in the future and that same thing is not a lotta work anymore.
MDesign
Re: Francis turbine spiral casing
Actually your example is precisely the KISS method. It's how I see a lot of blower housings designed in actual application. They're not particularly efficient but they definitely are cheap to produce for the vendors.
Course, if we can get a magic aerofoil featurescript I believe it's possible to abstract this turbine casing geometry into script form as well should someone be motivated enough to come along and do it. Maybe some day that person might be me. Until then, I'm content with my off-center circle housing.
Re: How can I quickly produce a 90 deg cruved part
Delete faces is like an intelligent magic eraser. I saw those little trenches were probably giving the algorithm trouble for sweeping or lofting etc. So if you just select the faces of those trenches and patch them up it will “heal”. When you sweep for example you can’t self intersects during the creation and it was probably doing that during the sweep in that area. Honestly if I were to do this from scratch I would use @MDesign idea with some variables for the face sweep profile sketch with another top sketch to guide the path with length and radius variables along with an offset amount for the end interlocking feature after the initial sweep.
Re: How to set a distance between a segment and another element, "away" in the 3D view
In the sketch you can select the edge of semi-circle and select the "use" command, from there you can use is as a reference.
Or you might be able to just show sketch2 and dimension from the "tip" of the circle directly
Re: simulation stress on wrench
Greetings WJT,
Thank you for providing a copy of your simulation wrench model. As Eric correctly suspects, we have split the faces and used Simulation Connections to selectively apply Mates between the two Parts.
In this particular case, we have applied a series of three Planar Mates, each of which enforces a sliding planar interface between the compressive halves of the wrench's parallel faces. In order to achieve this effect, one must:
- Split the faces of the wrench in (approximately) half. I happened to make the loaded portion slightly smaller than the unloaded portion, since I know that there is a slight "spill over" in the Simulation Connection region.
- Create a set of Mate Connectors associated with the wrench that coincide with the bolt's faces (or visa versa). Since the bolt and the wrench are modeled with slight clearances, these additional Mates are necessary. The clearances here are small enough that the simulation elements will easily span the gap.
As one might expect, the differences in results between a Fastened interface and this Thrice-Planar interface are two fold:
- The "Fastened" model artificially lowers the stresses on the regions of the wrench in contact with the bolt.
- The "Fastened" model places more strain on the arm of the wrench than does the "Planar" model, which has more "give" to it.
The choice of loading strategy is somewhat up to you. I have chosen to apply a moment over the faces of the wrench handle, but a linear force would do just fine.
I hope that helps and thank you for the question! Please write back if we can help clear up anything else.
Best Regards,
Chris
