helical spring with no. of turns??

[Vinom]

I have some problem in modelling a helical spring Which is Square ended..

Here i have total no. of coils, I.D,O.D, free length, solid lenght and Wire dia.

I can calculate the pitch value. but I want to model a spring applying no. of turns not the pitch value.

Help me out...

Do let me know how to model a spring defining no. of turns. in pro/engineer.

 

[Vinom]

Do anyone know how to model a helical spring defining no. of coils(turns)???

 

[tobbo]

Model the spring Using VSS , then you can deifine it by the numbers of coils


I have posted in several threads about the method. Search "spring" here on the forum and you will probably find it. if not, please let me know.


//Tobias

 

[ankarl]

As to my knowledge you cant do that without using relations.


Write a relation that calculates the pitch based on the length of the springand aparameter defined asno of coils.

 

[Vinom]

Thank u tobbo and ankarl..

Wil try and let you know..

 

[SRINIVASANIYER1]

Adding a parameter to define the number of coils is only
temporary. When one changes the number of coils in the
parameter field, the Pitch does not change.
e.g. Let us say I define two parameters...
Length (Free length) and no_coils (for number of coils).
While in sketch mode, let us say I set a relation for the
sweep profile sd0 = length (assuming the sketch parameter
value for sweep profile is sd0)
and when asked for Pitch, I type Length/no_coils. The
program correctly calculates the values and sets the
pitch to a CONSTANT calculated. I say CONSTANT since, on
changing the value for number of coils, the pitch does
not change.
Edited by: SRINIVASANIYER1

 

[tobbo]

SRINIVASANIYER1 , please upload a part that does what you say, it

 

[Vinom]

Tobbo I tried VSS for spring.
I got the helical spring but what should i do for modelling a conical spring??

Im a beginner..so im trying it all the way possible.
And your post are helping me a lot.

Do let me know how to model a conical spring with VSS.

Regards,
Vinom

 

[Vinom]

SRINIVASANIYER1, Yes it will help me.. if you upload.

Thanks

 

[tobbo]

Tobbo I tried VSS for spring.
I got the helical spring but what should i do for modelling a conical spring??

Im a beginner..so im trying it all the way possible.
And your post are helping me a lot.

Do let me know how to model a conical spring with VSS.

Regards,
Vinom

well , now it

 

[tobbo]

here you go:


2011-11-14_061953_spring_2.prt.zip


//Tobias

 

[SRINIVASANIYER1]

ok. here is a zip file with both a screen shot of the relation for pitch and the final part. I have SUPRESSED the helical sweep to reduce the file size. You may resume the same.


2011-11-14_223756_helical_Spring.zip

 

[SRINIVASANIYER1]

These links too might help.


http://learningexchange.ptc.com/tutorial/17/analyzing-helica l-sweep-profile-and-pitch-variations


http://www.e-cognition.net/pages/DatumGraph.html
Edited by: SRINIVASANIYER1

 

[SRINIVASANIYER1]

@Tobias: Thanks for the part. It gave new insights into
other possible methods.

Here is another method of modeling a Conical Spring using
the Helical Sweep command.
<a target="_blank" href="uploads/SRINIVASANIYER1/2011-11-
<br / target="_blank">15_033538_helical_spring.prt.zip">2011-11-
15_033538_helical_spring.prt.zip</a>

 

[annad_m_s]

Please see my earlier post on the subject here: http://www.mcadcentral.com/creo-modeling/28238-closed-helical-spring-using-helical-sweep.html