problem with sweep elicoidale

[bizio_88]

Good morning to all, I have a problem that I can't solve, maybe it's a setup to select or anything but I don't know how to help me :tongue:

in a few words the helical sweep command gives me error if I create a section with a profile greater than the step.

I better explain, if I want to create an external thread with step 1mm and my section is greater than 1mm in the widest point he by mistake, sometimes I solve by adding another helical sweep and split in two the cutting profile, but there is no command to select? to avoid this problem?

 

[DANI-3D]

Hi.
I press that I have not understood what you want to get, but I have the feeling that if the section is greater than the inevitably step by mistake.
If you attach an example we can give you some tips.

 

[bizio_88]

hello thanks to the answer, look at the attached image It is what I have to build, as you see the conformation of the iron used overlaps each revolution (evidenced in red) and I know that the error that prevents me from doing so is due to this.
but since I still need to realize it there is no option, a command or something that allows me to ignore this error by showing me how would it look if I tried to make such a piece in the car?

If I put these factors in a lathe, it doesn't make me wrong, but it would make me the piece as I want

 

[DANI-3D]

Now it's clearer. the problem is that pro-e does not accept the minor step of the section and perhaps the best solution is to make more sweeps. I try to think about it a bit, if I find a solution I warn you.

 

[DANI-3D]

I need more information. Can you also quote the thread profile obtained by this type of processing?

 

[bizio_88]

here is the profile of the resulting thread But obviously it is a result.

in other works I made two sweeps respectively with half the tool but I wondered if there was an option to be unchecked or something simpler.

 

[maxopus]

but the thread would be that triangle 0.25×0,216?

 

[ceschi1959]

excuse the intromission but why instead of removing do not add? with a lathe you can not but with the cad yes!

Hi.

 

[maxopus]

you can do as it says baskets, or change the cutting section to avoid interference.

 

[DANI-3D]

excuse the intromission but why instead of removing do not add? with a lathe you can not but with the cad yes!

Hi.

I have tried, but the problem is still

 

[ceschi1959]

you have to 'delete' the cylinder in diameter of the hazel and then add a thread in size 0.25 x 0.216..., it has to work! unless I understand anything you say, which is possible.

Hi.

 

[DANI-3D]

Look if he can go. if you meet, with relationships you can do a lot to simplify management

 

[bizio_88]

thanks for the answers :smile:
for "maxopus" yes the thread that from that example I would like to create would be that triangle 0.25x0.216, of course this is a simplified example of what I have to create, but to understand the problem is fine.

for "ceschi1959" to get the piece out I already "taroccato" putting the cutting section at 0.745 instead of 0.75 what happens, than at the end of the triangle instead of having the tip I have an invisible plan, instead add it is not okay, at the end of the trajectory the added thread disappears without fitting with the rest of the piece.

But I like to draw as precise as possible, if the piece I measure 0.75 I want to draw that piece is 0.75 even if then the program gives me error, of course though if I can't, tarocco, but giving me trouble I tried to ask on the forum eheh

for "dani-3d" I did not understand the issue of relationships well, the file you have attached is a simple thread and until they ok but also in your example when the cut section is higher than the error step, I do not need to create a thread but to elude that error that gives you when you exceed with the cutting section the step.

 

[DANI-3D]

for "dani-3d" I did not understand the issue of relationships well, the file you have attached is a simple thread and until they ok but also in your example when the cut section is higher than the error step, I do not need to create a thread but to elude that error that gives you when you exceed with the cutting section the step.

the problem arises when the outer diameter of the raw piece exceeds the east diameter of the thread, with the relationships you can set the d. of the hazel, step, height of the thread and calculate the other values without going into conflict.

 

[bizio_88]

ah ok though does not help me I do not need to calculate or study the profile of a thread, I need to know if there is a command, setting or anything that allows me to cancel the error that gives you pro/e when trying to make a thread with section that exceeds the step with the helical sweep command.

because even in your relationship I will not be able to create a thread like what I have described to you, because it still gives you error

 

[maxopus]

do as you were told before, cylinder diameter 8 and helical sweep with addition of material, it works.

 

[ceschi1959]

thanks for the answers :smile:
for "maxopus" yes the thread that from that example I would like to create would be that triangle 0.25x0.216, of course this is a simplified example of what I have to create, but to understand the problem is fine.

for "ceschi1959" to get the piece out I already "taroccato" putting the cutting section at 0.745 instead of 0.75 what happens, than at the end of the triangle instead of having the tip I have an invisible plan, instead add it is not okay, at the end of the trajectory the added thread disappears without fitting with the rest of the piece.

But I like to draw as precise as possible, if the piece I measure 0.75 I want to draw that piece is 0.75 even if then the program gives me error, of course though if I can't, tarocco, but giving me trouble I tried to ask on the forum eheh

for "dani-3d" I did not understand the issue of relationships well, the file you have attached is a simple thread and until they ok but also in your example when the cut section is higher than the error step, I do not need to create a thread but to elude that error that gives you when you exceed with the cutting section the step.

the tool of the lathe is not self-intersected as it passes for the same place in different times, to simulate this you can do two passes (as suggested by dani-3d) with two swept (with my cad is called so) of appropriate section. the obtained thread is 100% correct (picture two past).
you can add, as I suggested to you, a long thread as you like (long fillet image) and then cut it to size (short thread image). also in this case the result is 100% correct without needing to tarot anything.
p.s. my cad doesn't give me an error in the case of self-intersecting swept and this, according to me, is a great ca@ta also because it gives me error, later, in the operation of subtraction.

 

[DANI-3D]

example with relationships.
if I'm not mistaken I got the desired odds, and if you need other types of thread should just change the values set.