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Modelling problem

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Modelling problem

Hello!

 

I need some help regarding a modell i made. First I made a simple tube, then i created spiral cuts on the surface inside, with parameteres, so i can change the number of the spirals, the number of the turns of the spirals and of course the shape of spiral cuts. Now i would like to make from the straight tube also a spiral, a spiral tube. So i would like to have a spiral tube and on the surfafce inside the spiral cuts as i wrote. but the problem is that i can not make it with different number of turns. It works only if the spiral tube and the spiral cuts inside have the same number of turns. Could someone help? Is it  possible somehow for example "to turn" a straight tube?

On the pictures you can see my problem better. The two tubes i would like to "unite". Please Help!! Thanks in advance!

 

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Modelling problem

Hi, see if this helps.

I control the spining of the tube and its cut using 2 separate sweeps and the number of turns can vary independently.

16 REPLIES 16

Re: Modelling problem

Hi, see if this helps.

I control the spining of the tube and its cut using 2 separate sweeps and the number of turns can vary independently.

Re: Modelling problem

Hi BHooi!

 

Thank you very much for your help! I think it is gonna work with it, what i cannot find out, how can i change the number of the turns?

 

Thanks in advance! You are great!

Best regards,

ahkrit

Re: Modelling problem

I have just found it! Thanks again!

Re: Modelling problem

hi Bhooi / everyone!

do you have an idea with this spiral tube how could i do a harmonic goodlooking "backdriving" on to the middle axis? I could only solve it with 2 sweeping on different plane, the problem is that it does not look so good with this plus part, but with other attempts i always get a break by joining.

 

Thanks in advance!

Re: Modelling problem

Hi, could you please elaborate what you are looking for? May be a sketch or something that helps to explain further. Thanks

Re: Modelling problem

Hi!

 

I tried to do my best. but as i have know idea how to make an exact modell from it, it is also hard to make a sketch from it.

On the very first picutre(number 1) you can see the two  attempts. First i made 2 sweeps, with it i do not have any break in cross-section, but it has that plus part i don't want.  (These are pics number 3 and 4) I also tried with an extrusion from the tube from the beginning at then a longer sweepblend on to the middleline(middle axis) but it has a break in the cross-section by joining. (Pic number 2)

On the last picutres i tried to show what kind of goodloking spiral-formed "reducing" i would like to make to the joining part.

I hope it helps!

 

Thanks!!

Re: Modelling problem

It's hard to tell what you object to - perhaps using an image editor to clean up the views you do have would help.

 

Also, the spiral looks like the section is not normal to the spiral curve, so you cannot have a smooth transition. Makie it normal to trajectory to allow a smooth transition.

Re: Modelling problem

Hi!

 

Here ist the picture with number 4, at the spiral the section is normal to the trajectory, thats why i got a section at the beginning NOT paralel with other plane, it has an angle compared to the horizontal plane(pic number 5). But it has to be exactly that way,  thats how i got the same section along the spiral. 

 

The problem that then at the beginning i need a smooth change to the middle axis. Now i try to show you with sketches(pics number 1,2 and 3). Is it possible to make an oder surface with a round at the beginning of the spiral(as i sketched it) and these two surfaces to merge so i could creat with the surface edge a smooth trajectory for sweeping?

 

Thanks a lot!

 

Re: Modelling problem

OK, I have tried something and here is how it looks like.