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How do I draw a wave spring washer in 3D?
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* May 18, 2010, 10:46:27 AM
I can usually figure out some way to draw what I need but this one has me stumped.
An example can be found at:http://www.mcmaster.com/#disc-springs/=74xs7g

Pro 16.2 under XP

Any suggestions?

TIA

Bob
« Last Edit: May 18, 2010, 10:48:01 AM by ashtonrsmiller »

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* May 18, 2010, 11:26:39 AM
#1
One way:

As a guide, draw a circle and some uniformly-spaced radial lines (twice as many as the desired number of waves). To define the OD of the spring, trace the circle with a closed 3D Spline by Fit Points, clicking on the intersections of the circle with the lines. Select the Spline with the Edit Tool; select every other node; type an appropriate Delta Z in the Inspector Bar and then press Enter. Make a copy of the Spline and rescale it to define the spring's ID. Loft the two Splines with "Use compound profile" enabled. Shell the result to the desired thickness.

Henry H

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* May 18, 2010, 12:42:28 PM
#2
That worked great! 

Many thanks, it would have taken me days to figure that one out.  I haven't had any occasion to use either 3D splines or shelling before.

Bob

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* May 18, 2010, 04:26:00 PM
#3
The way I do it is I trace a 3D Spline by Fitpoints around a median size circle, and use the edit tool to move every other point by the required amount in the z direction (like Henry mentioned). I then sweep a rectangle around the spline. The rectangle size is the ID, OD, and thickness of the washer.

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AMD Phenom 1090T
8GB RAM
Radeon 5450 1GB
Windows 7
Redsdk  - Off
Editing History - On
v19.2 Platinum, x64


* May 18, 2010, 06:22:22 PM
#4
I did it by downloading McMaster's 3D Step model and imported it.

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TurboCAD v19 Platinum - 64bit
Windows 7 Ultimate - 64bit
Intel i7 - x980 (3.33 GHz 6 duo-core)
12GB RAM, ATI 5570 w/1GB VRAM, 2TB 7200rpm HDD

Fast but not the fastest...


* May 19, 2010, 07:46:23 AM
#5
Tanks Henry and Greg  :D

Every now and then I produce wave spring washers, and every time I wonder just out of curiosity how I would have to draw them (my customers alway supply Step-Files, so I never had to model one in TurboCAD)!

Kurt

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Kurt Zingg
TurboCAD Pro 6.2 - 16.2 Mec, TC-CAM 3.5


* June 15, 2010, 10:54:17 PM
#6
Hi Folks

The time has come that I had to draw a spring washer as a design suggestion for a customer - It worked flawlessly, you guys saved me hours of trial and error! - Thanks again, Henry and Greg

In my opinion, your descriptions of how to model a spring washer belongs in the tips and tricks section, so it doesn't get lost in the deep of "general discussion"...

Kurt

Edit: Attached a 3D-PDF of the spring washer
« Last Edit: June 15, 2010, 10:56:18 PM by Guojing »

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Kurt Zingg
TurboCAD Pro 6.2 - 16.2 Mec, TC-CAM 3.5


* June 17, 2010, 04:36:43 PM
#7
Hi Kurt,

Unrelated to your question, but how did you create that 3d PDF? Was it in TC? I am able to do it in solidworks, but wasnt aware that it is possible in TC if it is.

Cheers,
Charles

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* June 17, 2010, 10:48:29 PM
#8
Hi Charles

No, it's not possible in TC (yet??) - I'm using Alibre on the side, mostly for converting different File formats (it reads native file formats from most of the major CAD-Systems), and for creating 3D-PDF's for presentation purposes.

Cheers
Kurt

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Kurt Zingg
TurboCAD Pro 6.2 - 16.2 Mec, TC-CAM 3.5


* June 20, 2010, 12:30:50 PM
#9
Ah, no worries. Hopefully it will come to TC one day soon  ;)

Thanks for your help
Charles

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