Modeling Tension Spring With Hook

[scoutfai]

To avoid the twist, you WOULD need a second path to "guide" the corners.


You said you wanted to model a spring as shown in the picture you posted. We're all trying to get you to that point. You shouldn't ask a question regarding specific information and then CHANGE YOUR PARAMETERS after we answer you saying that it doesn't work. IT DOES WORK! We're NOT mind readers. How were we to know you were going to do something different than what you asked for?


Boy, you try to help...

Ok, breath deep, slowly, slowly, . . . I'm better now.

Pardon for causing your uncomfortable feeling.

I was stated that the method does not do thing in a complete correct manner (to my sense at least, apparently every people has different point of view). I do not put it into the wrong category. I do not have a formal education in SolidWorks and thus I just posting what I was thinking. If those statements insult your seniority in SolidWorks I am truly sorry about it.

That method does produce a spring that looks identical to the spring shown in my pictures, if just viewed by naked eyes. That method, I would guess that, the spring (with circle) is still twisted, but only it is not visible by eyes. My purpose is to model the spring, later on I will put into COSMOSWorks, I do not know whether such a invisible twist (I emphasize, it's just a guess) will affect the accuracy of the result or not.

Furthermore, the most sophisticated CAD modeling in my point of view is the one which mimic the real world manufacturing. I believe when such a spring is manufactured, no such twist is produced.

The reason I change the circle to a rectangular, is merely to test whether this method does what I want to. Obviously, my requirement is different than your requirement and I am sorry that I did not state it clearly in the 1st post.

Nevertheless, I will still take that method as an acceptable option. But if a method was found that does not produce such a twist, it will be more preferred by me.

I agree with you, that a guide curve will be needed to avoid such a twist. Although I never try it before but I will beg that it is not an easy task. Again this is the reason I am searching for a method which does not cause twist and is simpler than creating another guide curve (which I believe is hard)

Edited by: scoutfai

 

[scoutfai]

scoutfai,


Yes, that's the bit i meant.


In the sweep feature, did you try altering the different settings? Play about with them until you get what you want to achieve. You could create the helix as one body, then the hook as one boby and loft between the 2 bodies to create the joining curve using guide curves to help. Although the sweep should work!!

I did try other options available in the Swept feature, but it does not seem to be helping me.

Thank you for the suggestion. I will give it a try.
I would agree with you that, to model such a part, one single swept operation should be adequate and should only be done with this little amount of operation.

 

[scoutfai]

Scoutfai,


THe reason why you cannot trim the helix with you filletis because it is not in the same plane as the fillet. When you created the fillet you where in a 2D sketch while the helix is a 3D curve.


Using the 3D sketch and the 2 points pline as in my previous post will work. To control the splines you can add a tangency constraint at both ends (hook and helix) and if you need more control you can add curvaturecontrol at both end of the spline also.


Here it is again:


1- make the helix.


2- make the hook, leave a gap between the linear part of the hook and the end of the helix to fit the spline that will join them.


3- in a 3D ketch convert the hook and the helix then make the 2 point spline. Assing tangency at both ends and for better control add radius dimensions at both ends (see the help for this). That way it is fully defined and it should repeat when you do the other end.


4- Do the sweep.

Yes, I acknowledge that the two points spline method works. I have tried it after I read the reply and it does produce the spring.

I see, never thought of can constraint the spline fully like this. I will give it a shoot.

However, can you comment on my previous post, how come that person use projected curve method yet still success to model the spring?

Edited by: scoutfai

 

[michael3130]

Scoutfai,


I'll see if I can get time over the weekend to model the 'rectangular wire' option up. I know how to do it, just don't know if I'll get time.