Spring with one tapered section

[idslk]

Hello Colleagues,
i've been asked some days ago by somebody how to make a spring with a tapered section on one end.
The dimensions are regardsless. It should have an outer diameter from 6 mm, a wire of 1mm and a height of the cylindrical part of 25,5 mm for 14 revolutions. Starting at the one end it should widen up to somewhat about 11mm within a height of 6,5mm.
So my solution looks like the following.
First i made a sketch for the wire:


after this i made an hexid with the following values


For the next step i had to get a value for the angle of the taper. As i'm sitting in front of a CAD program a help sketch should do the job:


As i needed the angle of the taper for the next step, i defined it as a parameter:

to get an entry in the EquationEditor:



The next step was to make a sketch for the tapered section. For this i've selected the upper end face of the springwire and aktivated a new sketch. Here i projected the face as a sketch figure.


Now the helix for the taper



and here is the use of the taper angle created in the DimHelp_Sketch:



and this is the result:




Comments are welcome

Regards
Stefan

 

[HaroldL]

I just saw an old tutorial on the Cadalyst web site that is similar to this.
You should post this in the Tips and Tricks section.

 

[NateLiquidGravity]

I can hear the sound it makes when I kick it with my foot.

 

[oldfox]

@Stefan
Nice job. Like most other things in life, it's really simple when you know how. Thanks.

@NateLiqGrav
I had that same issue. Very annoying, so I installed a noise suppressor on the springs. Now all I hear is a poof..f..f..f..f..f

 

[OTE_TheMissile]

I can hear the sound it makes when I kick it with my foot.

Like an old Volkswagen revving up?