[helical sweep cut] step and height section

[Trotto@81]

why if I realize the section of the triangular base thread of height 5 mm the step cannot be of equal measure?
in the example attached the step is 5.1 mm, with a tenth less not develop it, yet geometrically it is possible.http://www.webalice.it/trotto81/vite.prt.1One thing I don't like is that if I design the thread in the middle of the development trajectory, it doesn't develop it entirely, but only from that point to the end, I wonder what it's for to indicate the starting point. :

 

[Trotto@81]

some examples with the use of the helix sweep. :smile:

 

[Parametric_Ozzy]

some examples with the use of the helix sweep. :smile:

I hope you don't want to shape the threads on all the screws...

 

[RS4]

why if I realize the section of the triangular base thread of height 5 mm the step cannot be of equal measure?
in the example attached the step is 5.1 mm, with a tenth less not develop it, yet geometrically it is possible.http://www.webalice.it/trotto81/vite.prt.1One thing I don't like is that if I design the thread in the middle of the development trajectory, it doesn't develop it entirely, but only from that point to the end, I wonder what it's for to indicate the starting point. :

the thread does not model on screws and bolts only weighs on the model

is indicated according to the rules of design uni en iso 6410-1

Hi.

♪

 

[Trotto@81]

Clearly, you don't need to shape it. My exercises are all.
I have done a 7-year technical drawing between high school and college. :smile:

 

[Parametric_Ozzy]

Clearly, you don't need to shape it. My exercises are all.
I have done a 7-year technical drawing between high school and college. :smile:

So what do you need?
we say that a zero cut as in this case is always problematic to handle in pro/e, because it depends very much on the type of precision set in the parts.. (you don't know where to cut and if you cut the vacuum fails!).

But... There's always a loophole like everything.
I don't tell you for now, if you're going to get there alone, I already gave you some clues.

 

[Trotto@81]

I said, I am ignorant of proes, they are simple exercises to learn.

 

[cacciatorino]

I said, I am ignorant of proes, they are simple exercises to learn.

I don't know pro-e, but I imagine the problem is that there would be singularities at the point where two successive steps of the helix touch each other.

you could try:

1) keep the "uterine" profile perpendicular to the helical curve instead of parallel to the axis of revolution as I think you are doing

2) rake the triangle in such a way that it is with h= 5 - epsilon and working on a diameter of hazel that already understands the truncation of the ridges that exists in a "real" thread.

 

[Trotto@81]

I thank you for the suggestions, but as far as I am concerned I am still at the beginning to understand certain mechanisms.