HOW TO USE RIP TOOL

lamberto_previati

Hello to all,

I'm a teacher and I use Onshape in my classes.

We must shape the object of the figure. Can I use the RIP command to make the cylinder part reinforcements? And if so, how do I use the command?

Thanks for the attention.

Jake_Rosenfeld

Hi Lamberto,

You can definitely make this geometry in Onshape.  You should look for the "Rib" feature rather than the "Rip" feature.  The "Rip" feature is for creating rips in sheet metal.

Here are some resources for you:
https://cad.onshape.com/help/Content/rib.htm
https://www.youtube.com/watch?v=GN-IKLWH6x0

chris_winters404

Hello Lamberto,
You could also select the front plane and use the Project convert(with the construction line feature turned on) to grab the two lines you would need to build the geometry for the supports and extrude symetrically from there. then array the feature around the cylinder and after that combine using the boolean feature.
Stay awesome!,
Sincerely,
Chris Winters 

chris_winters404

Here is a view only link. This turned into a bit of fun trying to do the ribs. They go from a straight surface at the bottom into a radial surface at the top of the boss
 https://cad.onshape.com/documents/9f234338d696237a996a1627/w/7b32076b9c096d6676f0477d/e/e2c0fad664e55d1116904466
I also added a second model using the rib featurescript

Jason_S

@lamberto_previati

Here you go 

https://cad.onshape.com/documents/d5530b3c4f76baffcc9ddc5a/w/cf20fee629b0088d72a84953/e/51069fedb1ee09329d332e77

Best of luck!

I would stick to using the Rib feature provided by Onshape. The Onshape approved feature started as the custom feature, but now it has a place in our standard library. Stability, reliability, and performance improvements went in since the creation of the custom feature. 

Jason

paul_britton

Neither of these solutions produce exactly the original figure..

The rib FS solution (Jason_S post) produces a 'step' at the top of the rib feature


The solution in chris_winters404 post produces a flat interface with the circular boss....



Now either may be actually acceptable for an actual manufactured part, but the figure that was requested to be modelled shows something different...



This would have a rib with a rectangular face that is non-planar (which I thought Chris was alluding to when he wrote "They go from a straight surface at the bottom into a radial surface at the top of the boss", but his model than didn't show.

Here is my attempt.....

https://cad.onshape.com/documents/7082e5f574b254885f1a9262/w/96dc5e459fd3570954b7e7b7/e/c65b55bf47a5e8f310c3b0a6

Which is created using a loft and yields the curved rib surface and interface with circular face

chris_winters404

I totally dig the loft style Paul! Thank you for sharing!

lamberto_previati

Dear,

I apologize for the delay, but here, in Italy, this period was committed to end-year trials and their assessments. So, I could not answer your suggestions. Many thanks, Jake_Rosenfeld, chris_winters404, Jason_S and paul_britton, for your time.

In fact, the image I have posted contains a print error, and the detail, that is, the rib, should have the flat inclined surface. This error has already been reported to the publisher. The type of representation is deceptive and does not describe that detail well. This is purely a geometric and theoretical problem. In reality, a similar piece would have very different solutions at that point. I admit, however, that the LOFT solution is definitely interesting, and that, in reality, it could be practiced with a CN machine. My young students had to work hard to solve this scratch.

Thanks again to everyone for your kindness and availability.

lamberto_previati

Dear,

I apologize for the delay, but here, in Italy, this period was committed to end-year trials and their assessments. So, I could not answer your suggestions. Many thanks, Jake_Rosenfeld, chris_winters404, Jason_S and paul_britton, for your time.

In fact, the image I have posted contains a print error, and the detail, that is, the rib, should have the flat inclined surface. This error has already been reported to the publisher. The type of representation is deceptive and does not describe that detail well. This is purely a geometric and theoretical problem. In reality, a similar piece would have very different solutions at that point. I admit, however, that the LOFT solution is definitely interesting, and that, in reality, it could be practiced with a CN machine. My young students had to work hard to solve this scratch.

Thanks again to everyone for your kindness and availability.