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How do I draw this interesting cam like piston part.

[ Edited ]

Title says it all. Just want to know how to do it in general.

4 REPLIES

Re: How do I draw this interesting cam like piston part.

We'll probably see many approaches.

 

My 1st reaction leans towaed a wrapped sketch, normal cut, draft the face.

 

2ndly, Create a bluesuft or lofted surf and simply replace face.  creating the desired surface is the trick...  but i think with the right cross sections and some circular guide curves we can get there...

 

Lets wait for @Imics to post us a video!!!

 

Re: How do I draw this interesting cam like piston part.

i had to take a stab at it...

 

this is ordered.

 

procject a sketch symetric onto od

priject a sketch symetric onto id

turned to blue surf

replace face.

 

pretty close

Re: How do I draw this interesting cam like piston part.

[ Edited ]

Hi,

 

There are some ways to do this (what was shown by @MattJohnsonPAC) , but it depends on manufacture process (milling...).

 

Here is a video:

link

 

BR,

Imics
http://solidedgest.wordpress.com/

Re: How do I draw this interesting cam like piston part.

I had a request to share the part file so that users could see the steps...

 

So I recorded a short, dirty, screen capture video (with audio) walking thru the process and am attaching the part file as well.

 

hope this is helpful.

 

video link:  http://screencast.com/t/tLkgRahI1