ali aeromodello

[LucaMazzarol]

hi to everyone, as I am home for a month with a broken arm and I no longer have decided to draw a 3d alien with inventor 2012 to be able then to mill the molds.
I did not have any problems, I created it with many sections and the loft command, but I am going crazy with the wings, I created a sketch with the contours of the wing, with the relative lines of positioning for the sections of loft.
for now I attach the design of the fuselage, and in the meantime I do some tests on the wing and I attach the relative masses to the table.

Bye-bye

 

[pompeo79]

hi to everyone, as I am home for a month with a broken arm and I no longer have decided to draw a 3d alien with inventor 2012 to be able then to mill the molds.
I did not have any problems, I created it with many sections and the loft command, but I am going crazy with the wings, I created a sketch with the contours of the wing, with the relative lines of positioning for the sections of loft.
for now I attach the design of the fuselage, and in the meantime I do some tests on the wing and I attach the relative masses to the table.

Bye-bye

to understand everything and how never does the loft also attach the ipt

 

[LucaMazzarol]

ok for now I have attached 2 the first is with the centines modified with a spline and the exit edges truncated at 0.5mm the second is with the centines as well as from the program.Today I try to repass all the centines in autocad with arches and then replace them in a new file, maybe digest them better?

 

[pompeo79]

already starts from the centines to reproduce them with a single profile, all those edges, those points... multiplied by the other centimeters and the loft command weigh down the development in addition to not making improvements and having a result not optimal.
I know that you imported them from autocad but or improve import, or the profile of autocad or redesign it in inventor.importing from autocad, personally, was always a practice that I considered as the last solution among the evils.

 

[LucaMazzarol]

I thank Pompeo79 :36_1_11:, today I took the profile in autocad, I drew vertical lines to smooth ways of fish increasing the accuracy on the inlet edge, then I cut them with the profile line and I imported them into inventor. I then automatically bound them and used the ends as constraints for a spline. This operation I had already tried to do it in autocad but in importing everything changed to me what.
In fact doing so everything works perfectly and the part remains very "slender".
the only thing I had to do during the profile recopying is to finish the spline a point before the exit edge (otherwise I joined the spline), and to combine the two ends (which end in a "blade" edge) with a binding line with tangent bond to the spline.
the thing is seen when they select the surface. Do you think he'll give me trouble? Would you recommend a better solution?

 

[pompeo79]

Hello, luca.
from March 27th I will be able to give you an even more interesting answer and regarding the 2013 release.
meanwhile you could split the profile into two semi-perimeters, each managed independently from a spline and connected on one side by coincidence and tangency, and on the other you would have no management problems in the final part of the profile.

we count to see the photos of the model made.

 

[LucaMazzarol]

perfect, I'll change everything tomorrow morning.
I will definitely post some photos, but the matter will be long, after finishing drawing the model in 3d, I have to draw the mold,(I already have a few things to ask) to rub the test molds in mdf to make the prototype. to write it quickly, but to do it... I keep you updated.
hello and thanks for the help
♪

 

[LucaMazzarol]

So, the last advice you gave me is perfect! !siclike I tried the method by making the tail planes that have symmetrical profile, I also added a vertive construction line in the bond of union of the 2 splines on the edge of entrance, and I inserted a tangent bond with one of the 2 splines and this line, because I noticed that not at that point the splines were not symmetries.adesso modified the wing and maybe placed a rendering of the finished model.
As for the mold I have something to ask you:
as cam I use heeks cam because for now it is the only free cam I found.
the problem of this cam, (as well as being very limited) is that you can't place the 0 piece accurately and therefore are "forced" to make sure that the pieces to work have the right origins according to the processing to be done.
the second problem is that my machine is self-constructed and despite being built discreetly well, I have 2m/min working speeds so as not to let it go for hours and hours continuously and especially to manage my hobby with other commitments I have to divide the work in multiple steps.
the method that I have tried for now is to create an axieme with different solids that correspond to the area that I want to work, I insert in this together the superfice derived from the master and the bond to the solids, then, double-clicking on the individual parts I go to change them together, inserting the surface of the master with the copy command object.cosi doing I have solids that have each of origin but a "consecutive" processing.
In your opinion, is it acceptable or is there a method that best suits this problem?

Bye-bye

 

[pompeo79]

I'm sorry the cam doesn't fit in my business.
Good luck!

 

[LucaMazzarol]

I'm so sorry!
thank you so much for your help, as soon as a nice rendering of the model is ready.
Bye-bye

 

[pompeo79]

Hello, luca.
from March 27th I will be able to give you an even more interesting answer and regarding the 2013 release.
.

with inventor 2013 there will be an interesting possibility, you can draw profiles using functions.

es, a symmetrical dwarf profile can be designed using the function

= thick*chord*t*5* 2969*sqrt(1in/chord)-(1260*t*1in)/chord)-(3516*t^3*1in^2)/ (chord^2))-(2843*t^5*1in^3)/ (chord^3))-(1015*t^7*1in^4)/(chord^4))

or always algebraically obtain variable step propellers.

 

[LucaMazzarol]

good, surely a useful function also from the working point of view (not only for my hobbies).
Do you know if they solved the problem of the scan of the pieces with the chassis generator? I explain, both in 2011 and in 2012 when I model a telio in profiles (type upn or ipe) and I go to do the scans, in distinct components gives me the measurement of the uncoated piece, as if the groove was a removal of the overmetal,
In fact to solve the problem you must first trim the piece with the face of the profile that does as a punch, then perform the groove.
the beautiful that if I use the right corner command does everything alone!!

p.s. but the hell did you pull out the profile formula?:4425:

Bye-bye

 

[pompeo79]

good, surely a useful function also from the working point of view (not only for my hobbies).
Do you know if they solved the problem of the scan of the pieces with the chassis generator? I explain, both in 2011 and in 2012 when I model a telio in profiles (type upn or ipe) and I go to do the scans, in distinct components gives me the measurement of the uncoated piece, as if the groove was a removal of the overmetal,
In fact to solve the problem you must first trim the piece with the face of the profile that does as a punch, then perform the groove.
the beautiful that if I use the right corner command does everything alone!!

p.s. but the hell did you pull out the profile formula?:4425:

Bye-bye

propionate it a little clearer (I don't think I fully understand) in a separate topic, it can be an interesting topic and someone have the answer.

 

[LucaMazzarol]

propionate it a little clearer (I don't think I fully understand) in a separate topic, it can be an interesting topic and someone have the answer.

OK.
ciao

 

[simo4781]

hi guys, this is the discussion I was looking for
I realized a whole with rhino, the idea is to realize the negative molds to fresare from plexiglass or similar, until now I managed to draw the model but I have some difficulties with the negatives, I make the bolean subtraction but not satisfy me.
for the realization of the wing I do in a simple way, I draw the contour, amount the profiles and then use the command sweep 2 tracks.
I attach some pictures and appearance tips and opinions thanks