solidworks 2017,e sweep creati su elica

[Mircaccio90]

Good afternoon to all,
work in the field of mechanics, precisely mechanical design of lifting winches.
to realize a calandered tondino that is wrapped and welded to the threaded drum with throat = rope diameter, we use the helical function to realize a path of 180° that then with the sweep command becomes the calandrated tondino. the problem that arises is that often the sweep does not follow the path of the propeller but rather starts from the opposite direction and therefore obviously not good, I attach an image of the problem.

thank you all,

Myrtle

 

[MassiVonWeizen]

possibly attach the file (make a copy and delete everything that comes after.
alternatively allega property manager of the wind function and property manager of the sweep; it also highlights the sketch of the tondine profile. in this way perhaps, much perhaps, you can recreate your situation

 

[MassiVonWeizen]

make a copy and delete everything that comes after.

I intend to simplify the file by deleting all frozen functions, which do not serve for the problem and make the moddelo less sensitive to data that preclude the sharing.

 

[welcome to the machine]

I do not know sw but for a very similar problem, on a definitely less evolved cad of sw, I use the library that allows to create the springs, imposed the step equal to the diameter of the wire, besides the other parameters, and comes out what I need. Could be a shortcut if sw has a similar library.

 

[MassiVonWeizen]

solidworks has no such libraries, except to create them specially in its own. but it is not a matter of library or not; the propeller function creates the path of the spring and then uses the sweep function to make the solid that follows the path of the propeller. the problem in this case is that the propeller has a sense of rotation while the sweep is reverse and this is impossible.

 

[Mircaccio90]

good morning to all, the file in question is created through equations and is a modification of an existing drum, so I can't send you the file, but I attach the property manager.
thank you very much and good work

 

[MassiVonWeizen]

Is he just doing it on your computer?
Did you write that he does it often, the other times how you solved it?
Can equations affect? if you eliminate the sweep becomes correct?

 

[Mircaccio90]

I happen a couple of times to myself, to other colleagues I also believe. I solved it as now, thinking on the contrary as it does solidworks but it becomes crazy, that is, placing the propeller to the opposite and playing on the sketch. the equations for that profile I modified them and eventually eliminated to exclude any possible cause! if I rotate the propeller by changing the offset angle in some positions (not correct for the particular) it happens that it returns to be aligned, but there is no fixed rule because it does a little as it seems to him.
I would like to understand how many have had a similar problem with sweep that does not follow the props, maybe it is a sd bug.

 

[MassiVonWeizen]

Did you contact assistance?
and if you used the curve made to make the cut on the drum and elininassi the excess of material with simple cuts?

 

[Mircaccio90]

I didn't contact the assistance, I'm late with the project and you'd waste too much time, I'll do it as soon as I can.
I have not understood what type of processing you mean, however it is very delicate because the thread on the drum is done first, then the tondino is created by a sketch on a sloped plane that is made by a 3d sketch anchored to the crest of the thread and quoted according to the step, I do not know if it is clear!

 

[MassiVonWeizen]

I thought that if the thread is made with propeller and sweep cut you could always use the same prop to make the tondino. then cut the excess that you come to create.
what could create problems is the 3d sketch, but do you need to do it for a simple round? Can't you use the sweep with the appropriate circular profile option?

 

[Mircaccio90]

the tondino has the function of making the rope to overcome, so it has a very specific position that comes out from the 3d sketch.
do all the round and then cut it out I don't know if it can work, but it seems very complex to do so.

 

[MassiVonWeizen]

as I think that the problem is 3d and comnque sketch is about circular profile, instead of using a profile sketch use the circular profile option and see how it behaveshttp://help.solidworks.com/2017/italian/solidworks/sldworks/r_swept_boss_base_property_manager.htm