9 Replies Latest reply on Dec 23, 2012 3:14 PM by Jerry Steiger

# Sphere with Holes

Greetings Solidworks Gurus' and Masters out there,

This is my "virgin" post on SolidWorks Community Forum and I would kindly like to seek your expertise and advise.

I am just trying to create a simple component. It is basically a sphere/hemisphere with perforation on it.

The purpose of this component to allow fluid to pass through hence increasing the pressure drop of the fluid after passing through this "tea seave" like component.

I created this pattern by means of:-

1. Pattern on a Curve

2. Axial Pattern

3. Mirror Pattern.

Question:-

Is there a much simpler way of doing this? I do not feel that my method is correct because:-

1. I have to do the perforation in segments. Because otherwise, the circular pattern at the smaller diameter willl start overlapping each other.

2. The pattern is not staggered properly. Unlike if i pattern on a flat surface, the pattern can be staggered 45deg or 60 deg apart etc.

3. I have to manually adjust the number of instances and angle each time till i get the correct distance between each holes.

I have attached the model for your reference as well. I do hope some of you can shed some light.

Best Regards,

Scott Low

Message was edited by: Wei Siong Low

• ###### Re: Sphere with Holes

This is similar to a golf balls geometry, maybe you can find something searching for that. This one from Scott Baugh is similar to yours, with the same problems.

http://www.scottjbaugh.com/Design_Portfolio/Design.htm

• ###### Re: Sphere with Holes

Welcome to SolidWorks forums Wei.

You may use equations to create the spacing for you else your method should be OK to use.

• ###### Re: Sphere with Holes

This is purely a guess from me, as I've never attempted this, but would a fill pattern work?  Below is a link to a discussion on fill patterns.

https://forum.solidworks.com/message/303318#303318

*Edit - appears fill patterns do not work on curved surfaces, bummer.

• ###### Re: Sphere with Holes

How about making one icosahedral segment (with spherical ID and OD surfaces) and then assemble 20 copies?

• ###### Re: Sphere with Holes

Thanks Dwight, i will try this method, but i think this method is more tedious compared to just patterning holes on the spherical surface. Then again i guess with more hard work, u usually get better, more consistent results...

• ###### Re: Sphere with Holes

patterns of features on a sphere can be quite tedious and will likely bog down your system. so WHY do you need to model the holes?

and if you do really need to model the holes, can you fully define the hole pattern?

• ###### Re: Sphere with Holes

yeah i think i do need to model the actual holes because i then need to put this component through FlowSimulation to see the pressure drop across the holes.

The holes can be fully defined using the Hole Wizard tool.

• ###### Re: Sphere with Holes

Thanks for all the input guys, i guess there is no simple straight forward way of doing this kind of pattern as of today. Probably in future there might be something...

• ###### Re: Sphere with Holes

Scott,

You might try seeing what you can do with Curve Driven Patterns. I seem to recall some clever soul using Curve Driven Patterns in two directions to do some very nice patterns on a 3D part.

Jerry S.