Circular groove of variable depth 2

[SDO]

Hi guys,

Imagine you have a disk. On one of the faces you you need to put a circular groove, concentric with the disk, with a width from r1 to r2 (radius) and an angular length from ß1 to ß2 (angular). The trick is that the depth of this groove needs to be variable, like a swimming pool going from shallow (say 0 depth) to deep end.

Thanks,
Sorin

 

[handleman]

Sounds like a relatively simple cut sweep along a helix.

 

[handleman]

See if this file helps you out.

 

[CorBlimeyLimey]

Here's an alternative method using the Up to Surface option (SW07);

http://www.mooload.com/new/file.php?file=files/050207/1170685437/Groove+Disk+CBL.SLDPRT

Image only;

http://img214.imageshack.us/img214/3083/groovediskcbllg9.jpg

 

[handleman]

CBL, Your solution is certainly much simpler. However, it appears (I can only view the screenshot since I'm still on 2K6) that this method will produce a groove whose bottom is only perpendicular to the axis of the disk in 2 places, i.e. the bottom is not "square".

 

[SDO]

Oh yeah, you're right, it's quite simple, thanks to both of you gentlemen.
Sorin

 

[CorBlimeyLimey]

Correct ... it would have to be EDM'd or ???
Just offering a potential alternative.

The required groove cross-section would obviously determine the actual machining and modelling method used.

 

[handleman]

Ah, how to make it is another challenge indeed. As has been reflected in several threads here, machining a true helix is always difficult. Using a standard CNC running in a circle while feeding downward would end up with a rounded-bottom groove due to the leading/trailing edge of the mill cutter. CBL's result could be obtained by setting up the workpiece at an angle and moving the cutting head in an ellipse.

 

[Heckler]

That would be done on the 5th axis on a mill. I've done the very same problem in Pro/E. Picture a pin that runs in a groove.....ie a bayonet. I created using surfaces then knitted them together.....then used Surface Transforms. It took me about 15 features to create this slot. I will post an image because it's an interesting challenge for SWx.

Best Regards,

Heckler
Sr. Mechanical Engineer
SWx 2007 SP 2.0 & Pro/E 2001
Dell Precision 370
P4 3.6 GHz, 1GB RAM
XP Pro SP2.0
NVIDIA Quadro FX 1400
o
_`\(,_
(_)/ (_)

(In reference to David Beckham) "He can't kick with his left foot, he can't tackle, he can't head the ball and he doesn't score many goals. Apart from that, he'

 

[Heckler]

Here is the part....I've highlighted the feature in RED.

http://www.mooload.com/new/file.php?file=files/060207/1170733454/Test_Part.SLDPRT

Best Regards,

Heckler
Sr. Mechanical Engineer
SWx 2007 SP 2.0 & Pro/E 2001
Dell Precision 370
P4 3.6 GHz, 1GB RAM
XP Pro SP2.0
NVIDIA Quadro FX 1400
o
_`\(,_
(_)/ (_)

(In reference to David Beckham) "He can't kick with his left foot, he can't tackle, he can't head the ball and he doesn't score many goals. Apart from that, he'

 

[gatz]

'feeling kinda dumb here...how do I view that pic, Heckler ?
When I click on the link, it takes me to mooload.com, but then what?

 

[Heckler]

Then download the file. It's a SWx 2005 file.

Best Regards,

Heckler
Sr. Mechanical Engineer
SWx 2007 SP 2.0 & Pro/E 2001
Dell Precision 370
P4 3.6 GHz, 1GB RAM
XP Pro SP2.0
NVIDIA Quadro FX 1400
o
_`\(,_
(_)/ (_)

(In reference to David Beckham) "He can't kick with his left foot, he can't tackle, he can't head the ball and he doesn't score many goals. Apart from that, he'