create a bombing of a solid face

[edoberna]

Hello everyone,
I am new to the forum and also to autocad.
as I said in the section I recently opened a company in the fashion accessories industry.
in order to save a lot of money I'm rearranging (in fact I'm going crazy) behind autocad (version for mac 2013) for the realization of the various pieces of the collection.

so far everything (or almost) well, as long as the company that should produce the pieces asked me to create bombings on the faces of a solid quite complex that I had previously delivered them.

coming then to detail, I need to create a bombing of a surface or, better, of a solid face.
the bombing is very few tenths of millimeter and must be regular.
comes alone that obviously the "base" figure of the bombing is an irregular flat figure of four sides.

I've searched every place but I can't really come to terms with it because of my ignorance :frown:

I will be grateful if you can help me.
Thank you!

 

[MarcoBi]

Okay, but you don't understand that well, do you?
In any case, since you talk about an irregular flat figure at 4 sides, I would suggest:
- extrusion of the figure
- Boolean subtraction of a solid revolution to create the required bombing.

 

[edoberna]

Okay, but you don't understand that well, do you?
In any case, since you talk about an irregular flat figure at 4 sides, I would suggest:
- extrusion of the figure
- Boolean subtraction of a solid revolution to create the required bombing.

:wink::wink::wink: excuse me.. .
I try to explain myself better:
If I had to make a "bomb" of a circle, I would have made a curved polylinea line passing in the center of the circle itself at the desired height. closed the line I would then generate the solid by rotation creating a "cupoletta", a "capocchia" of the circle.

This technique, of course, with a square figure is impossible and, at the moment, I do not know other techniques suitable to meet my needs especially in view of the fact that the flat figure is also irregular.

As for the method indicated by you for the same reasons, I find it impossible because I cannot create the solid of subtraction revolution.

to make you understand better, everything comes from the fact that the method of processing of the object to be realized does not tolerate completely flat surfaces (as heat tends to suck them) and therefore it becomes necessary a "bombing" of some tenth of millimeter.

 

[GP.]

I attach an image with exaggerated deformations just to understand what kind of model you have to create.
the first and second come from the modification of mesh, the third is a simple fitting of edges.
considering that we are talking about a few tenths of millimeter the procedure for the realization of the first and third turn out pretty fast, for the second there is to sweat.

 

[edoberna]

I attach an image with exaggerated deformations just to understand what kind of model you have to create.
the first and second come from the modification of mesh, the third is a simple fitting of edges.
considering that we are talking about a few tenths of millimeter the procedure for the realization of the first and third turn out pretty fast, for the second there is to sweat.
View attachment 33677

first of all thanks for the interest, to have to deal with people who care to help you in the difficulties always makes pleasure.

coming to your drawings, the ideal would be a middle way between the first and second.
As I said, the need is to make the surface round in all its points in a linear and gradual way, with a curve that starts from scratch near the edge and increases gradually and constant until the apex of 0.2mm in the center of the surface itself.

I understand better: in the first image it seems that the face of the solid is "punished" by a regular sphere with the consequence that the bombing is "irregular" than the shape of the face itself.
in the second instead such "regularity" between bombing and face there is but remains the problem of the central flat surface that instead must be rounded for what is said before.

In any case, before you get damned again, I would ask you to explain the steps to get the first result so that you can apply it directly to the object and see if the result can be satisfactory.

Thank you so much again!

 

[GP.]

...in the first picture it seems that the face of the solid is "painted" by a regular sphere. . .

if it were performed on a long and narrow figure would give another impression, follow this tutorial in which I predicted two cases that give slightly different results:

a) flat face of solid
b) supcoon performed with surftab1=2 surftab2= 2
c) supcoon performed with surftab1=3 surftab2= 3

- meshsmoothmore command applied to mesh, until rejection

d) ctrl+click on the mesh center to highlight the grip for change
f) g) select the grip and "lift" the mesh

- create a surface at the base of the mesh (the blue one)
- transform mesh into the surface (convinsuperf)
- transform the airtight area (mesh+surfaces) into solid with scolpiscisuperf
join the solid created to the face of the main solid.

amen

 

[edoberna]

I'm already desperate. . .
then, starting from the first point, I tried both on a flat rectangle, and on a solid face but when I do the edgesurf command (supcoon in English) asks me to select object 1 for the surface and then object 2.
even if I create a solid doesn't even let me select object 1.
Where am I wrong?

 

[edoberna]

Like not said!
good or bad result I brought her home!
thank you so much to all and especially to gp!
first experience from this forum 110 and praise!! !

 

[doking]

if it were performed on a long and narrow figure would give another impression, follow this tutorial in which I predicted two cases that give slightly different results:

a) flat face of solid
b) supcoon performed with surftab1=2 surftab2= 2
c) supcoon performed with surftab1=3 surftab2= 3

- meshsmoothmore command applied to mesh, until rejection

d) ctrl+click on the mesh center to highlight the grip for change
f) g) select the grip and "lift" the mesh

View attachment 33682- create a surface at the base of the mesh (the blue one)
- transform mesh into the surface (convinsuperf)
- transform the airtight area (mesh+surfaces) into solid with scolpiscisuperf
View attachment 33681join the solid created to the face of the main solid.

amen
View attachment 33683

Why at first pass, then supcoon, I stick current wireframe density: surftab1=6 surftab2=6?

is it too much to ask to post a guide a little more detailed for those who did not understand a bat in all this? ? ? ?

 

[edoberna]

then, I will try to explain how I got the desired result.
1) I created a polyline on the tops of the face of the solid;
2) with the edgesurf command (supcoon) I created the surface;
3) surftab1 and surftab2 values set them to my liking so as to create the desired effect, say 6 per side in a square figure;
4) assuming that I want to create a bombing that at the highest point is two millimeters, the first perimeter of squares of the mesh I left them unaltered, the second perimeter more internal I raised it of a millimeter perpendicular to the face, the third (which should be equal to the four central squares) of 0.5 mm and then I took the summit to the center of the mesh and raised it of another 0.5mm.
5) at that point I converted into surfaces with convinsuperf
6) finally joined the surface to the solid with scolpiscisuperf

 

[GP.]

Why at first pass, then supcoon, I stick current wireframe density: surftab1=6 surftab2=6?

those are default values, as all variables just type their name to be able to assign a value.

 

[edoberna]

then, I will try to explain how I got the desired result.
1) I created a polyline on the tops of the face of the solid;
2) with the edgesurf command (supcoon) I created the surface;
3) surftab1 and surftab2 values set them to my liking so as to create the desired effect, say 6 per side in a square figure;
4) assuming that I want to create a bombing that at the highest point is two millimeters, the first perimeter of squares of the mesh I left them unaltered, the second perimeter more internal I raised it of a millimeter perpendicular to the face, the third (which should be equal to the four central squares) of 0.5 mm and then I took the summit to the center of the mesh and raised it of another 0.5mm.
5) at that point I converted into surfaces with convinsuperf
6) finally joined the surface to the solid with scolpiscisuperf

I correct myself:
1bis) I explore polynea;
3bis) meshsmoothmore on the surface until rejection;

if, as in my case, the plans are not all parallel to some axis, need to make a new ucs by setting x and y so that you can raise the mesh on the z axis (perpendicularly to the face).

 

[doking]

thank you guys, I managed to
you are very kind and helpful

I was wondering, but is it possible to use this procedure only when you have sides of the mesh start flat? If we had curved them?? ?

 

[prismacad]

from the menu convert surfaces or create in nurbs, shows the vc (control tactics) and moves as you want (from autocad vers. 2011 onwards)

 

[AndreaVi]

hello to all and excuses....for work I have never used these combinations but I found them interesting, especially the post of g.p. that I thank!!!(no offense to others, it means :redface
I would have a question:to me the command scolpiscisuperf does not work, from the infamous "unknown command"
the version of autocad I use in the office is 2010(...)I read on the net that is probably a command introduced by the release 2011 but I found nothing clear. ..someone can confirm or deny please? ? ?
I'm curious... thank you all in advance!! !
skiauuuuu!!!:finger:

 

[GP.]

...I read on the net that is probably a command introduced by the release 2011 but I found nothing clear. . .

That's right, see the surfsculpt command here: http://www.hyperpics.com/commands/index.aspp.s.: prego: pity:

 

[AndreaVi]

received!!!thanks gp.....nothing I can do nothing with 2010!!!...patience! !
It was comic when I followed the procedure you described... all oki... and I nailed myself to the final! ! ! !
:36_1_28:

ps...figure yourself! :smile:

 

[MarcoBi]

You're obviously "autocad fast."
by the method I had indicated you easily get this:If then, that's not what you wanted to get. .

 

[doking]

marcobi should get a solid that has equal thickness in all its points starting from a well defined curved perimeter and without changing it

 

[MarcoBi]

marcobi should get a solid that has equal thickness in all its points starting from a well defined curved perimeter and without changing it

Surely it's because of my early aging, but I didn't understand anything. If he must have equal apessor in all his points is an extrusion.
Bad old age thing.. .