I learn modeling feed screw.
Feed Screw I drew with the command "Curve driven pattern". The surface formed is not smooth, but has a large specific surface. How can you make a smooth surface?
Surface like this...
Profile sweep It is not an appropriate function.
My first attempt,
I put a plane at the end of your helix, and did a section thru extrude boss2 and
used that to cut the profile,
This is the way I made mine.
..the others have shown you the way to do it... but for you to get the profile cut shown normal as you show.. you'd need to change your profile (cutter size) to... so, I offset your original profile 7mm and it seems to be about right?..
This is not exactly the right solution.
What if the helix is not constant, but variable. In this case, this solution does not work.Cutting with profile for feedscrew not the right solution. The real function of drawing feedscrew is cut with a solid, but it only works with certain shapes (circle).
This feedscrew used in the industry, it spins very fast so it must be accurate.
I cant open this file, i have SW 2015
Here is a geometric design using surfaces by Pascal from this post Transportschnecke für Dosen (DS SolidWorks/) - Lösung vorhanden! - Foren auf CAD.de
The approach starts with a sweep of the center axis of the tool and then offsetting the resultant surface at the distance equal to the radius. Good thinking.
This should in principle work for your tooling shape as well.
Elmar,.. Pascal did something interesting here.. I'll try to tweek that technique later.... what I did try was loft or interpolate what Dorivan did with the body pattern.. but it does not add up quite right.. and doing a solid cut/sweep still is not quite right (forum link attached),.... although, there is a guy in South Africa which made a "Feedscrew" add-in which looks pretty good at doing this this and twisting the profile!...
Feed Screw addin works great. But when you have a complex shape You can not do surface.
You can draw feedscrew, but You can not smooth out surface.
Paul how do merge multiple surface to one ?
Hey Davorin,.. so, you've used that Feed Screw Addin?
..anyhow, I'll add what I did using the pattern and loft (using every other radial profile) and solid cut...
..this subject gets my brain going because, in another thread, it brings me back to my earliest roots drawing (pencil/vellum) extruder screws... it's challenging for sure! Back then, we relied on the artist/engineering machinist to help us with the transition/blending between flights... I'm still mesmerized and extremely impressed with their abilities using a lathe and the later processes to create those beautiful chrome screws!!
I finaly learned how to merge multi surface in one.
How can i fill to solid ?
You have to first close of all the faces using surfacing then knit surface and turn into a solid. See Attached part for reference
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