molds

[montaviale]

Hello everyone

it is for weeks that I try to understand how to make the mold of this plant. the problem is that I cannot use the top plane to create the division line because the profile at a point intersects the plan, I think there is also a technical term to define this. I tried to create a block from which to subtract the plan and then cut it with the top plane but clearly does not work... can you advise me a way to make the mold?

Thank you.
faith

 

[ceschi1959]

Hi.
post a step and see what I can do. from the images you do not understand much.

Hi.

 

[montaviale]

Hi.
post a step and see what I can do. from the images you do not understand much.

Hi.

Here we go! thank you for the help
faith

 

[Matteo79]

Why do you make the mold of the only semiala?
I explain: it is good to reason for symmetry but so you have to do the line and the surface of division in the middle office, where you have problems.

Is your goal to use integrated commands for molds?
I already tell you that, by direct experience, and wanting to eventually manage each component of the mold as part to itself, I never use those commands.

I also tell you that most of the time the division surface is created by reconstructed 3d curves; among other things you built the wing from the wing profiles so you already have the solid construction curves to use for the division.

Since, however, I have seen that the two seeds cannot be joined then I understand why reasons on one; In that case you have to model the "incrimined" division line (for example a spline, just connect to the edge of attack and exit of the mid-range profile).

 

[montaviale]

Thank you for the answer!

Anyway, I can't make the whole mold of the two semials joined because they have a dihedron of 5.5 degrees... I tried to draw a spline that goes from the be to the bu but it is not the root profile or end that I can not cut but the be and the bu... to me it would be enough to cut the wing along all the be and the o... Once done, you could do the division line. . .

Thank you.
faith

Why do you make the mold of the only semiala?
I explain: it is good to reason for symmetry but so you have to do the line and the surface of division in the middle office, where you have problems.

Is your goal to use integrated commands for molds?
I already tell you that, by direct experience, and wanting to eventually manage each component of the mold as part to itself, I never use those commands.

I also tell you that most of the time the division surface is created by reconstructed 3d curves; among other things you built the wing from the wing profiles so you already have the solid construction curves to use for the division.

Since, however, I have seen that the two seeds cannot be joined then I understand why reasons on one; In that case you have to model the "incrimined" division line (for example a spline, just connect to the edge of attack and exit of the mid-range profile).

 

[RS4]

Hello everyone

it is for weeks that I try to understand how to make the mold of this plant. the problem is that I cannot use the top plane to create the division line because the profile at a point intersects the plan, I think there is also a technical term to define this. I tried to create a block from which to subtract the plan and then cut it with the top plane but clearly does not work... can you advise me a way to make the mold?

Thank you.
faith

hello

explain that profile where you took it, you did it...? ? Why did I take a look at him, but it's really worth it... could you clean it? ?

Hi.

♪

 

[Matteo79]

Thank you for the answer!

Anyway, I can't make the whole mold of the two semials joined because they have a dihedron of 5.5 degrees... I tried to draw a spline that goes from the be to the bu but it is not the root profile or end that I can not cut but the be and the bu... to me it would be enough to cut the wing along all the be and the o... Once done, you could do the division line. . .

Thank you.
faith

I haven't seen the dihedron angle, but I still don't understand the point: Do you want a flat closure at all costs?
In other words, math problems apart, as a moldist I would only worry about respecting gypsies or rather not having subsquadri in the division of the piece.
I don't even consider the corner of the back if they're lying on the whole wing; for what concerns the semiala, if possible I orientate the piece to not have subsquadro at the root and at the end.

I have not made any case to overwhelms but also there were I believe it is always possible to find a closure if even complex.

But what is your end?

 

[montaviale]

My end is getting a mold like this http://forum.modelarji.com/viewtopic.php?t=64065... can you explain to me by step the functions you would use and how?
I didn't draw the profile. the amount as set of x,y,z points... I don't know how to make it smooth. ideas?

Thank you very much for your help

I haven't seen the dihedron angle, but I still don't understand the point: Do you want a flat closure at all costs?
In other words, math problems apart, as a moldist I would only worry about respecting gypsies or rather not having subsquadri in the division of the piece.
I don't even consider the corner of the back if they're lying on the whole wing; for what concerns the semiala, if possible I orientate the piece to not have subsquadro at the root and at the end.

I have not made any case to overwhelms but also there were I believe it is always possible to find a closure if even complex.

But what is your end?

 

[SolidUser]

mold tools work, the problem is the file.
the loft you generated does not do miracles if the curves are hurt.
to have beautiful surfaces, you must have beautiful curves.
You better attach the original file.

 

[Matteo79]

If you want a solid, you must:
- cancel one of the 2 semial (the body is symmetric)
- create your symmetry plan
- clear the face corresponding to the alare profile at the root
- mirror the semi-ala with respect to the symmetry plane (now it is a surface)
- join the 2 surfaces forming the solid

so you can reason with a whole solid (easy there is another way but if I try to join the imported 2 solids I get nothing, the mathematics as you have already been told is not the maximum)

for the mould as soon as possible you must proceed with surfaces:
- back and belly divides (for example creating 2 offset surfaces 0 of the back and belly)
- create surface mold plates

solidworks loves solids but by experience I tell you that who "cold", for example with powermill, solid does nothing so that the time you waste to get a solid from a body with some defect, minimum you mean, is wasted.

 

[montaviale]

okkay, then I noticed that the problem of the curved brute is only in solid, in the sense that if I amount the cloud of points in rhino and join the points with a grade 3 curve I get good surfaces, while I think that solid generates the curve with a set of 1 degree breaks...

mold tools work, the problem is the file.
the loft you generated does not do miracles if the curves are hurt.
to have beautiful surfaces, you must have beautiful curves.
You better attach the original file.

 

[montaviale]

okka, I will use the surfaces. So I have to
1 improve curves
2 use surfaces and not solid

but it is not clear how to generate the mold starting from a surface body.

faith

If you want a solid, you must:
- cancel one of the 2 semial (the body is symmetric)
- create your symmetry plan
- clear the face corresponding to the alare profile at the root
- mirror the semi-ala with respect to the symmetry plane (now it is a surface)
- join the 2 surfaces forming the solid

so you can reason with a whole solid (easy there is another way but if I try to join the imported 2 solids I get nothing, the mathematics as you have already been told is not the maximum)

for the mould as soon as possible you must proceed with surfaces:
- back and belly divides (for example creating 2 offset surfaces 0 of the back and belly)
- create surface mold plates

solidworks loves solids but by experience I tell you that who "cold", for example with powermill, solid does nothing so that the time you waste to get a solid from a body with some defect, minimum you mean, is wasted.

 

[Matteo79]

brutally said when you split the body into the 2 semi-tastes (in terms of surface: back and belly of the wing and do it quickly because you already have in the model the division, despite the defects of the mathematics) you have to create the closing surface from the side of the wing and then the other 5 faces of the parallelepiped that represents the mold (or better the semistampo).

that then the operation of union of the obtained surfaces leads to obtain the solid or not (and will not do) is another speech.

I repeat if you need to work with this model you can proceed so, it will then be the molder to evaluate the file you will give it and, possibly, to tell you if it has problems to fresare especially to the exit board.

if you have the patience to rebuild the model by preparing the curves that will be the division line very likely that you can work on the solid.

just to understand, how much are you bound by profiles (in the sense, what file did you import)?
I suppose you will use 3d curves to facilitate/model the loft between the different alar profiles; Can't you create the lines of the exit edge and attack on a plane (scratch 2d)?
this would facilitate the creation of the closing surface.
Finally, the exit edge of the 3d is cusped as from theory? can you not modify it also by inspecting it and/or radiating it (the minimum indispensable and if necessary)?

 

[montaviale]

thank you very much for the advice

the profiles are set of points in txt files, I inherit them via insert> curve> through points and then I converted one to one on the individual section planes, after I climbed and positioned them. to generate the loft I designed the be and the bu on the upper floor. http://www.rcgroups.com/forums/showthread.php?t=1205833&highlight=solidworks this is the thread I followed for the drawing. yesterday drawing the fuselage I found some difficulties in creating the wing seat. http://www.modelbouwforum.nl/forums/hlg-dlg/98746-tantalus-goes-molded-3.html here half the page you see what I should do. I first created a fuselage assembly and adding the wing, placed the wing on the fuselage but I couldn't get the wing seat. how do you advise me to act?

Thank you.
faith

brutally said when you split the body into the 2 semi-tastes (in terms of surface: back and belly of the wing and do it quickly because you already have in the model the division, despite the defects of the mathematics) you have to create the closing surface from the side of the wing and then the other 5 faces of the parallelepiped that represents the mold (or better the semistampo).

that then the operation of union of the obtained surfaces leads to obtain the solid or not (and will not do) is another speech.

I repeat if you need to work with this model you can proceed so, it will then be the molder to evaluate the file you will give it and, possibly, to tell you if it has problems to fresare especially to the exit board.

if you have the patience to rebuild the model by preparing the curves that will be the division line very likely that you can work on the solid.

just to understand, how much are you bound by profiles (in the sense, what file did you import)?
I suppose you will use 3d curves to facilitate/model the loft between the different alar profiles; Can't you create the lines of the exit edge and attack on a plane (scratch 2d)?
this would facilitate the creation of the closing surface.
Finally, the exit edge of the 3d is cusped as from theory? can you not modify it also by inspecting it and/or radiating it (the minimum indispensable and if necessary)?

 

[SolidUser]

okkay, then I noticed that the problem of the curved brute is only in solid, in the sense that if I amount the cloud of points in rhino and join the points with a grade 3 curve I get good surfaces, while I think that solid generates the curve with a set of 1 degree breaks...

What you write is absolutely not true.
if you want help post the txt file and the solidworks model.
There is a macro for enthusiasts like you on this forum in 'useful resources' that performs a procedure that may interest you.
as you have seen on the forum on which you base that the tool sw molds works well.
if you want to follow the directions of matteo, go ahead, but I do not share for nothing his suggestions / method.

 

[montaviale]

What you write is absolutely not true.
if you want help post the txt file and the solidworks model.
There is a macro for enthusiasts like you on this forum in 'useful resources' that performs a procedure that may interest you.
as you have seen on the forum on which you base that the tool sw molds works well.
if you want to follow the directions of matteo, go ahead, but I do not share for nothing his suggestions / method.

I attach the solid plan file and the respective profile in txt. I tried a script but I think it only generates naca profiles

 

[Matteo79]

What you write is absolutely not true.
if you want help post the txt file and the solidworks model.
There is a macro for enthusiasts like you on this forum in 'useful resources' that performs a procedure that may interest you.
as you have seen on the forum on which you base that the tool sw molds works well.
if you want to follow the directions of matteo, go ahead, but I do not share for nothing his suggestions / method.

About what? I press that I ask you serenely, sw I learned it and I'm learning it on my skin, I'm basically the only one in the company that uses it, my other colleague uses powershape (and powermill).

 

[SolidUser]

I attach the solid plan file and the respective profile in txt. I tried a script but I think it only generates naca profiles

This is what macro supports naca and .dat file (.txt) to two columns, so also your txt once removed the third column.
I can't file you as you use a 'student' as a version, so my files can't open them.

I suggest you do it again with the macro and some suggestions I give you:
1) the initial sketch is fine enough, replace the ellipse with a spline passing through the points.
2) leads to binding all the sketch and not to leave quotas of type 74.48, but to become 74.5.
3) create a plan for each profile section.
4) use the macro indicated
5) on windows 7 the macro is not brought to the foreground, but you will need to use alt+tab to view it
6) Set up your file by removing the third column
7) changes the extension .dat
8) put it in the path you prefer and set it in the macro
9) pre-select the plans in the use of the macro and the profile is already inserted into the right plan
10) the macro allows you to scale the right value profile (see below and use the 0.09 comma to make the 90 mm rope profile)
11) creates a new file and imports the wing to use the 'stampo' commands to not weigh the whole....you separate the mold project from the wing project

 

[montaviale]

Thanks for the tip, I'll try tonight. Can you recommend a way to solve the problem of the seat for the wing?

Thank you.
faith

This is what macro supports naca and .dat file (.txt) to two columns, so also your txt once removed the third column.
I can't file you as you use a 'student' as a version, so my files can't open them.

I suggest you do it again with the macro and some suggestions I give you:
1) the initial sketch is fine enough, replace the ellipse with a spline passing through the points.
2) leads to binding all the sketch and not to leave quotas of type 74.48, but to become 74.5.
3) create a plan for each profile section.
4) use the macro indicated
5) on windows 7 the macro is not brought to the foreground, but you will need to use alt+tab to view it
6) Set up your file by removing the third column
7) changes the extension .dat
8) put it in the path you prefer and set it in the macro
9) pre-select the plans in the use of the macro and the profile is already inserted into the right plan
10) the macro allows you to scale the right value profile (see below and use the 0.09 comma to make the 90 mm rope profile)
11) creates a new file and imports the wing to use the 'stampo' commands to not weigh the whole....you separate the mold project from the wing project

 

[SolidUser]

Thanks for the tip, I'll try tonight. Can you recommend a way to solve the problem of the seat for the wing?

Thank you.
faith

One thing at a time.
first you get a nice surface and then describe the home problem.