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Diamond Knurl Extrude
2

Diamond Knurl Extrude

Diamond Knurl Extrude

(OP)
Good afternoon, I have a tube which now they want to have a diamond knurl on the OD instead of a straight, whcih was easy.  With the straight knurl I just made a profile of the knurl and extruded it and then circle patterned it.  Looked good.  Now I need to angle the profile about 45 degrees and extrude it but I can not figure out  how to get the extrusion to follow the contour of the OD.  Any one know how to get that first groove to cut at a 45 degree angle and still cut at a constant depth on the OD?  Am I being fairly clear here?  Thank you for any assistance in advance.

RE: Diamond Knurl Extrude

I don't bother with modelling knurls.  No point in adding the extra overhead and all the extra surfaces.

For knurls I prefer to just use a cosmetic thread and a callout.

RE: Diamond Knurl Extrude

The way I have created knurls before is to use a helix, sort of like a thread. Make the sketch profile and pattern it on the OD. Then make another helix going the opposite direction.

Chris
SolidWorks 07 3.0/PDMWorks 07
AutoCAD 06
ctopher's home (updated 03-26-07)

RE: Diamond Knurl Extrude

If you REALLY have to model the knurls, do what Chris said above.  Create a helix for a path.  Use a triangle to Sweep along the helical path and create your first twisting cut.  Use a circular pattern to add enough cuts.  Do the same for the other direction, but with your helix turning the opposite direction.

As TheTick said, this takes lots of "overhead"--you don't want to have many parts like this in an assembly (or anywhere else) unless you absolutely must have them.  They are performance hogs.  Once in a while I truly need to model something like this, in which case I suppress the initial helical cuts and the circular patterns when not in use (usually need these for a detailed rendering, for instance).

Jeff Mowry
www.industrialdesignhaus.com
Reason trumps all.  And awe transcends reason.

RE: Diamond Knurl Extrude

I agree with the others. I only did it a couple times because the customer required it. Otherwise, we add a note to the dwg indicating the knurls.

Chris
SolidWorks 07 3.0/PDMWorks 07
AutoCAD 06
ctopher's home (updated 03-26-07)

RE: Diamond Knurl Extrude

(OP)
Thanks Jeff, I think that the helix idea is the way to go.  Thanks God that there are on two parts in the entire inventory that have diamond knurkls.  

RE: Diamond Knurl Extrude

(OP)
Thanks Scott, that is what I wanted and the one I tried to build is blowing out on the last circular patern.  Is there a reason for using two half circluar partterns instead of on whole one?  Thanks.

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