Helical Compression Springs

[eServ]

Does anyone know of a Helical Compression Spring Start Part that allows the user to enter the Wire Dia, Coil Dia, Free Length, & total coils, and no matter what length value you put in, the amount of coils would automatically update?

 

[bdennis]

You don't want a start part, you want a generic part driving a family table of springs. Just set up relations to get what you want to have changing with the inputs.

 

[eServ]

Can you give me an example? We have tried to write relations, but the number of coils keeps coming out wrong. We currently have a start part, with relations & parameters, that is a variable pitch, helical sweep. You enter in the wire dia, length, coil dia, & # of coils and it automatically creates the spring, but the # of coils is never accurate. I am trying to find a better way of doing it.

 

[mbolem]

i think if we can work oout with pro/program using the same relations as keshav and immeditely we run the programit asks for the required if we create those prompts.

 

[1]

Thanks keshav, that is what we do for a spring with a constant pitch, but I am referring to a variable pitch spring. We've tried similar relations and parameters, but with no success. Can it be done?

 

[praduman]

I think you need to set up relation for start pitch and end pitch.



Here is the example.



total_number_coils = 6

length = 12

pitch = length/total_number_coils



I assumed that (D18+D19)/2 = length/total_number_coils



Pitch value at start point

D19 = 2*pitch/3



pitch value at end point

D18 = 2* (2/3) * pitch



You have to set up some relations depending on how many points do you like to consider during giveing variable pitch.



Any further please write to me.



Good luck