Help with creating a recess on a 3D solid model

[Bobzy20]

Hi I wonder if anybody can help me with this small problem I have. I’m trying to add a 15mm recess on the side of this Conrod but I don’t know how to create it as I’m fairly new to 3D modelling.

 

As you can see from image no. 1 below I’ve drawn the outline of the recess on one side of the Conrod (Red) but now need to extrude it 15mm inwards. This will also need to be mirrored to the other side too.

 

It should then look like image no. 2 below when completed.

 

Any help would be great.

 

Thanks

 

Bob

[ReMark]

Extrude it inward and then Subtract?

[fahim108]

You have two options here,

1. Either, make a profile polyline (as you seem to have made), region it, extrude it inwards, then subtract it from the rest of the solid.

2. Or, use the imprint option from the Solids Editing Toolbar, imprint the profile polyline, then extrude face it inwards, that's it!

 

I hope that was clear!

[Bobzy20]

Hi thanks for your replies, I tried to region the polyline recess profile with the solid and I got this error:

 

1 closed, degenerate or unsupported object rejected.

 

Do you know what this means?

 

Thanks

 

Bob

[ReMark]

Change the orientation of your UCS and use Press/Pull to create the solid.

[fahim108]

You're selecting everything while regioning... Only select the polyline and you're done...

 

*oh and btw, that 1closed thingy means your polyline has already been converted to a region... just continue with extrusion and subtraction...

[Bobzy20]

Hi thanks for your replies, the push/pull command worked well very well but lets say I didn’t use that and I used the normal region it, extrude it inwards, then subtract option.

 

This is what I get once I did these things, 1st image shows the recess extruded inwards but once you de-select everything it appears the recess isn’t showing at all (see 2nd image)

 

Thanks

 

Bob

[ReMark]

You did something wrong. It almost looks like you did an offset first, then a region, then two subtractions. I think you got carried away on that one.

[fahim108]

Have you subtracted it. Seems like a duplicate region/3d solid. Just erase it, maybe you're done it two times and made two solids... just guessing!

[Bobzy20]

Hi thanks for your replies, ok I jut exploded the recess polyline profile and then p-edited it back to a polyline. Then I selected the union command and tried to union the recess polyline only and I get the message:

 

Command: region

Select objects: 1 found

Select objects:

0 loops extracted.

0 Regions created.

 

Looks like its not becoming a union!

 

Thanks

 

Bob

[Bobzy20]

Also if I try and select the 3D solid and the recess polyline together and make them union it says:

 

At least 2 solids, surfaces, or coplanar regions must be selected.

 

Thanks

 

Bob

[fahim108]

Check your polyline's properties (select it and hit Ctrl+1) and make sure it is listed as "closed" at the end of the flag. Then Region it...

 

Btw, you can't union a 3D solid with a 2D region (polyline is out of question!)

[bjschw]

If you extrude the polyline 30mm then move the extruded solid in 15mm then subtract the extuded solid from the conrod it should work and all you need to do is delete the solid you extruded.

[Bobzy20]

Wow I managed to do it no problem once the recess polyline was listed as Closed!

 

Thanks very much for your help everybody.

 

 

Also I’m looking to have some R/C (Radio Controlled) wheels CNC machined in aluminium soon but require 2 wheels to be drawn up in CAD and then exported to a file that would go straight into the CNC machine.

 

Does anybody know anything about this & would anybody be interested in drawing the wheels for me?

 

Thanks

 

Bob