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scaffolding

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dgclaudia

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Hello.
I'm a naval ing student, I'm looking for examples of nesting sheets for cutting the same, where can I find some examples?
Thank you.
greetings
 
dgclaudia said:
Hello.
I'm a naval ing student, I'm looking for examples of nesting sheets for cutting the same, where can I find some examples?
Thank you.
greetings
Click to expand...
Hello claudia.
I hope you've gone by the way first:http://www.cad3d.it/forum1/showthread.php?t=187&page=79It's a simple forum policy, or at least of this, which is welcome to be respected.
Then we try to answer your question.
If you have already provided, I apologize, but my "research" doesn't work.
thank you and welcome on cad3d.
 

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XAM said:
Hi.

if you have enough of the composition of a nest (the drawing of the pieces on the sheet) I think you can find some examples on the net looking for the dedicated software.

here some links:http://www.mtc-software.com/italian/image/pronest/pn2010.jpghttp://www.exactcam.com/these are of naval structures:


Is there anything you're interested in?
Click to expand...
to answer so we were all capable.
I'm sorry, but if I wrote the previous post, there's a reason.
nothing personal with claudia but lately there is the bad habit of entering without even presenting itself, asking and leaving.
so before offering an answer, as a moderator of the naval area, I would like to respect the basic rules of the forum.

p.s. to attach the images, use the appropriate "graffetta".
Thank you.
 
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thank you for the answer, I apologize for not having respected the forum rule!!! !

Yes, I'm trying to figure out how the structural details of a 2d boat should be made and then use it for cutting.
Thank you.
 
dgclaudia said:
thank you for the answer, I apologize for not having respected the forum rule!!! !

Yes, I'm trying to figure out how the structural details of a 2d boat should be made and then use it for cutting.
Thank you.
Click to expand...
hello claudia and welcome on cad3d. especially welcome in the naval area of the forum.
We come to your question. would you like to understand how to make structural drawings for a boat? in which material is made?
nesting, is the "guided" cut, optimized by software, materials such as iron, steel, aluminum, marble, glass, leather, etc.
If you talk about boat maybe you're referring to the cutting of the fabrics used for fiberglass.
If so, I leave the word to the experts of plastic materials (I mastic mainly iron).
in any case I link you to an address where to find specific software.http://www.nauticexpo.it/tab/nesting.htmlif then instead your "barca" is iron (or aluminum), I expect you to the next.
Bye.
 
thanks, yes the boat is iron;
I would like to see it also in aluminum... .
Thank you.
 
dgclaudia said:
thanks, yes the boat is iron;
I would like to see it also in aluminum... .
Thank you.
Click to expand...
you have to provide some data to have an indication of how to make constructive/structural designs.
Do you have the building plan? the plan of the irons?, the general plans... In short, enter data to receive answers.
Bye.
 
Okay, yeah, I have the plan of construction and a draft of the iron plan, that is, just where the irons should come....... .
Thank you.
 
dgclaudia said:
Okay, yeah, I have the plan of construction and a draft of the iron plan, that is, just where the irons should come....... .
Thank you.
Click to expand...
I repeat, if you don't give some data, I don't know how to help you.
It is not that the irons are dimensional all the same and they are placed in the same way.
 
If I understand correctly, they are rows to, to settle on the bottom and on the side, then there are those of the internal bridge; are 12 ordered, the boat is 7 meters long, the motor is at the center of the boat,
other data I don't think I have them.... .
 
dgclaudia said:
If I understand correctly, they are rows to, to settle on the bottom and on the side, then there are those of the internal bridge; are 12 ordered, the boat is 7 meters long, the motor is at the center of the boat,
other data I don't think I have them.... .
Click to expand...
I think it's a little...
a boat of about 7 meters with 12 ordered has the same posts at 580mm each other (the so-called interval). a construction so small, it should be transversal structure, that is, with the resistant elements predominant in the ordered.
then you should find a central longitudinal with keel functions and different background and hip currents.
these are generally made of flat bulbed irons but you can also use angles.
then we could go on to infinity talking about how to size the same, how the links between the parts, of funds, double funds, wallpapers, massive keel, flat, welded structures or kiodates, paro or overlap. . .
In short, guys/and if you do not provide precise information, how can you expect to find answers or help?
 
Yes the structure is transversal, there are 4 rows at the bottom.... .
There are 3 wallpapers..........
then the cross section previews the rib, then there is the bottom(internal bridge) and under a transversal frame made from irons to l, all here.....
other I do not have and do not think I have it, my problem is how to draw in cross section the various ordered therefore constituted from irons to l obtained by bending of the plague.....
 
I will take you back here, an extract of what has already been published in the discussion "Laodice project".
for your case is not fully applicable due to the different dimensions of the boat.
but make the idea of the data necessary for the realization of a project.from the point of view of longitudinal robustness, the ship is comparable to a beam loaded perpendicularly to its axis and therefore subject to cutting and bending efforts.
the trend of the cutting effort can be obtained from the integration of the diagram of the residual loads.
the bending moment is obtained by integration of the cutting diagrams.
establishing the weight of a ship discharged and dry when it is still being projected, is one of the most uncertain and complex operations.
the amount of machinery, plants, furniture, etc. that must be installed does not allow the certainty of the evaluation.
therefore the weight is determined using statistical type assessments established by the registers (such as our den). Depending on the type of ship and its size, the diagram returns the weight of the equipment while, a second diagram, allows us to determine the weight of the engine system and its machinery according to the power and type of ship.
As the project progresses it is possible to fill out the so-called “load exponent” that brings value and position of all the weights and necessary liquids.
for the performance of the hydrostatic push is used the bonjean diagram on which the values of the transversal areas are reported. multiplying by 1.025 the ordered so obtained, you get the spin diagram. spins and weights are sumable algebraically and give rise to a third diagram mentioned above, of the “remaining loads”.
established static stresses (crew in calm waters), dynamic stresses must now be assessed. even in this case the calculation is far from simple because of the unpredictability of the factors that they contribute. ondous training, speed of the ship, etc. as many of the data are not available at the beginning of the project, also in this case it is used statistical formulas provided by the classification institutes. fundamentally it is considered that among all the ondous formations, the most dangerous is that whose wavelength is similar to the length of the ship (0.8 – 1,2 l) and of height equal to 1/20 of the length itself. to simplify the calculation is considered the “freeze” wave, thus transforming a dynamic phenomenon into a static while keeping in mind the emergence of fatigue phenomena. with the integration of the diagram of the residual loads for full-loaded vessel in the crest or cable of the wave, the cutting stress is obtained and then the bending moment. in general the max mf is concentrated in the ship center while the maximum cutting efforts are located at 1⁄4 and 3⁄4 of the length. the maximum mf will be in correspondence of the main section therefore:
- the value of the mf is calculated.
- is divided by the bending resistance module obtaining the max sigma that is compared with the amm. sigma obtained from the statistical formulas of the registers (the ones we used).
It is obvious that the max sigma must be less than the sigma amm.
for the calculation of transverse robustness, a simplified but precautionary scheme is adopted. It is considered that the cross section is independent from the longitudinal elements. By doing so it is attributed to the load frames that are actually shared with adjacent structures (which puts us in safety conditions). as static loads you consider the loads agents on a frame horse range. other loads to consider are the hydrostatic pushes to straight and inclined ship. dynamic loads are translated into distributed equivalent static loads.
to the stresses quoted so far we must add the torque moments caused by the waves in case they are oblique to the ship. other loads to consider are those loads of great entity concentrated in restricted areas of the hull as prora (argans salpa anchors, wells chains...) stern (timoni, propellers), zone motor apparatus, gearboxes.
 
ok, my problem is to draw the structures in 2d, then use them for cutting.... .
so do I have to make the holes passing of the allongitudinal and flange obtained by bending like drawing?
the needles that have a radius of curvature like drawing them?
 
dgclaudia said:
ok, my problem is to draw the structures in 2d, then use them for cutting.... .
so do I have to make the holes passing of the allongitudinal and flange obtained by bending like drawing?
the needles that have a radius of curvature like drawing them?
Click to expand...
You need the building plan.
from the building plan, if you do not have the "relevated" i.e. the coordinates of the points that "disegnate" the ordered, you must get the surface of the hull that you will go to cut with range of 580mm (if the terms are not correct, excuse me but I do not use autocad).
from the profiles so obtained, you build your order sized according to the required loads.
being transversal structure, except for the keel, let's say that the longitudinal ferries are interrupted on the order.
but they are very generic indications.
If you can, not violating confidential data, you can send me the dwg of the building plan (if necessary in pm an email address) and tomorrow I try to give us a look.
 
Okay, thank you, very kind! ! ! !
I will give you a file very close to mine, of this still do not have the dwg, I have to prepare it.....
ok to the email address
Thank you.
 

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