creating cosmetic internal thread?

[prodigy86]

is it possible to create an internal thread just for cosmetic reasons, as for a iso drawing rather than just using the text to say its a thread.


thanks in advance

[keebler303]

In solidworks you can make a helix and sweep a triangle around the helix to form threads. I think its a waste of time though.

Matt

[MichaelHenry]

is it possible to create an internal thread just for cosmetic reasons, as for a iso drawing rather than just using the text to say its a thread.

I don't think I've ever done it, but would probably use the approach outlined by Matt if I needed such a feature. If it's a standard thread type, though, I'd use an isosceles trapezoid to create the thread form.

Mike

[TomB]

I just tried it and had no problem creating the internal thread. I drew a plumbing coupling as a test. But unless you are going to show the thread in some sort of section drawing it is hardly worth doing. The threads simply don't show up well as the shadowing does not work internally.

My steps were:
1) do a sketch with a 3.5" and 4" diameter circle then extrude it to 3" deep.
2) do a second sketch on the plane through the center of the tube and on that sketch add a reference rectangle to define the inside of the tube. Then add an equilateral triangle that is the cross section of the thread. Constrain that triangle to the side of the reference rectangle and the point to one end of the tube.
3) close the sketch with the heli-cut extrusion. In the pop up box you have to insert numbers that represent the thread and don't cause the thead profile traingle to overlap itself while doing the extrusion.

When I first used the helical boss and cut I had to play around with them for quite a while before I could make them work. The difficulity is with that intersect problem.

Tom

[Mad Welder]

is it possible to create an internal thread just for cosmetic reasons, as for a iso drawing rather than just using the text to say its a thread.


thanks in advance

It's a relatively straight forward process in Alibre. What ever plane your pipe, cylinder, nut or flange etc., is on just insert an axis perpendicular to the face of your part and central to the ID of your part, once you have that drawn first then select the plane/side view of your part draw the thread i.e. , acme metric bsp etc., asign a constraint to "lock" the thread drawing to the face and ID side of your part (which will appear as a vertical line and horizontal line respectively in your present open view port/screen) then select the cut helix icon on the right hand side of your Alibre page, when the popup window opens input your respective info and select the axis you have drawn to revolve your thread around, and an advantage also is you can see your thread being created even as you enter the info, and you can always edit your thread at any time by selecting it from the 'tree' of drawings on the left of your screen and also have a look at the Alibre tutorial video's from the help tab they really are fantastic and informative and watching a vendors video may sometimes be easier to pick up than following instructions on paper.

Hope I haven't confused you and this is of some help.........