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How to Cut a Part Hollow if the Thickness is Changing. Do not know how to make the shape of the variable thickness.

Question asked by Abb Rog on Jul 5, 2020
Latest reply on Jul 6, 2020 by Krzysztof Szpakowski

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Hi, I am new to Solidworks and looking for your help with Contours and Offsets.

How would you offset with a constant variation in thickness of a part. For example you have a Vase with an opening at the top and a belly then the bottom. I will show you a snip it soon. So its mouth is 1/8th thick, then as you go to the bottom passing the belly it increase to 3/8th. I need to cut this but not sure how to cut my block of Vase to match these thickness requirements because the thickness is changing AND THE CONTOURS change as well.

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FiberSteel_1of2_V4_C.SLDPRT.zip136.9 KB
Complete body_Must Hollow Now.PNG84.2 KB
Contours.PNG95.7 KB
IMG_0682 (1).jpg76.1 KB

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Krzysztof Szpakowski Jul 6, 2020 2:58 AM

Use Cut Revolve features. On symmetric plane, draw inside shape (half) and revolve it.

Or make this "Vase" as one features. See bellow:

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Abb Rog @ Krzysztof Szpakowski on Jul 5, 2020 5:10 PM

Hey Krzysztof, Thank you for the feedback.

I am working on that. The outer shell changing shapes really fast. How do I make it so that it is 1/8 thick on the top and 3/16 thick from outside. How would you draw the inside shape to cut revolve, the thickness will not be easy to get. I am will give it a go.

Wish there was an offset option so that I can pick the initiation of offset at 1/8 and conclusion of offset to 3/16. Unable to convert shape onto a plane as well. I am going to try this right now again.

Thank you

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Krzysztof Szpakowski @ Abb Rog on Jul 5, 2020 5:39 PM

First select side edge and convert it. Change new line to construction.

After, you can draw new line and dimension it to construction line

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Jim Riddell Jul 6, 2020 12:40 AM

I would do this a little differently than Krzysztof Szpakowski suggests. I'd sketch on a center plane, create the inner profile just as your sketch, close it at the top and do a revolve cut. Of course I would have revolved your first sketch complete to make the original part and then there would be no need of a second operation.

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Krzysztof Szpakowski @ Jim Riddell on Jul 6, 2020 3:04 AM

Jim Riddell I think that you didn't read my first post

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5 Replies

Krzysztof Szpakowski Jul 6, 2020 2:58 AM
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Correct Answer
Use Cut Revolve features. On symmetric plane, draw inside shape (half) and revolve it.
Or make this "Vase" as one features. See bellow:
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- Abb Rog @ Krzysztof Szpakowski on Jul 5, 2020 5:10 PM
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  Correct Answer
  Hey Krzysztof, Thank you for the feedback.
  I am working on that. The outer shell changing shapes really fast. How do I make it so that it is 1/8 thick on the top and 3/16 thick from outside. How would you draw the inside shape to cut revolve, the thickness will not be easy to get. I am will give it a go.
  Wish there was an offset option so that I can pick the initiation of offset at 1/8 and conclusion of offset to 3/16. Unable to convert shape onto a plane as well. I am going to try this right now again.
  Thank you
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  - Krzysztof Szpakowski @ Abb Rog on Jul 5, 2020 5:39 PM
    Mark Correct
    Correct Answer
    First select side edge and convert it. Change new line to construction.
    
    After, you can draw new line and dimension it to construction line
    Like • Show 1 Like1
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Jim Riddell Jul 6, 2020 12:40 AM
Mark Correct
Correct Answer
I would do this a little differently than Krzysztof Szpakowski suggests. I'd sketch on a center plane, create the inner profile just as your sketch, close it at the top and do a revolve cut. Of course I would have revolved your first sketch complete to make the original part and then there would be no need of a second operation.
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- Krzysztof Szpakowski @ Jim Riddell on Jul 6, 2020 3:04 AM
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  Correct Answer
  Jim Riddell I think that you didn't read my first post
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How to Cut a Part Hollow if the Thickness is Changing. Do not know how to make the shape of the variable thickness.

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