Help With Grease Groove

[maesoph]

Dear All:



I need help making a figure 8 grease groove on the inner diameter of a bushing. Basically, If I took a piece of paper or sketch plane, drew a figure 8 on it and then rolled the paper or sketch plane into a surface, that would be it. It's similar to a cosmetic groove, but that's not quite it since it needs to have depth.

 

[donha]

I am attempting to assimulate what you have asked. Sheetmetal, create feature wall, protrude the wall, wrap an 8 around it using a datum curve. Flat pattern? Does this help?



Second option: Feature, create, surface, extruded. Extrude the surface. Feature, create, datum curve, normal to surface. Feature, create, tweak, flatten surface. Flatten the surface. This option is backwards, but will get you your dimensions.

 

[maesoph]

I am running Wildfire 1.0 and I don't see the Feature-create-tweak command, but other than that, I think you are closer than anyone else that has tried to help. This one stumped our friends from India. Once the shape is flattened out, the problem is simple; but I haven't been able to do that yet. Thanks for trying.

 

[maesoph]

If anyone is wondering, here is what I want to do. Basically sketch, etc. on the inside of a curved surface - I do apologize for the autocad screen shot, please forgive me.



View attachment 400

 

[Hacks]

Check this recent link out...



http://www.proecentral.com/portal/forum/msgDetail.asp?msg_id=3670&for_id=15



Download the file that Huug supplied and replay it in Model Player...it may give you some ideas on how to go about this.



Brad

 

[slashct]

Try making a formed Curve on the inside, the sketch would look like this, if you want just a cosmetic... The overall length will be a relation of the ID*Pi thats the circumference. Similar to the previous post. A sweep will fail because it overlaps, but I believe if you treat them as two halves you can do a sweep...



View attachment 401

 

[slashct]

I think this is what I think your looking for Mind the dims



View attachment 402



Email me if you would like the ProE file, if others want I can post it.

 

[maesoph]

slashct:



I got it figured out and mine looks about like yours. I used a combination sin*cos similar to what hack suggested and it looks similar to your. Go ahead and post the file - I am new at this and will likely learn something.

 

[martina]

Just like creating a spring, but instead of creating a solid, you are creating a cut on a cylinder surface; of course the pitch is the height of your cylinder. You create a left handed cut and then a right handed cut, or variable sweep.



Right1?

 

[slashct]

I uploaded the file back on the 28th or 29th, how long until it shows up in the file area? Here it is for anyone looking for it.