project ladice

[Exatem]

I'll follow, see what's coming out. .

for what I know, yes. a hydraulic cylinder with a ball at the tip. with balls of different sizes you get the desired shapes.

calm your wife... I meant this technique here:

with a similar technique were joined the poppiera section built to trigous shore and the prora built to the spice of the cauliur.
However, for what I see doing in our workshops, the sheet is calandated or pressed according to the type of deformation that must be subjected to, "tires" and welds to the structures. the joints between the bandages take place of head, about 10-15 cm from the iron below after the cyanfrination of the sheets. the bandage is welded to the irons with continuous welding or at times alternating always depending on the area where we find ourselves.
It is interesting that the sheets undergo a wear that reduces the thickness. after measuring the residual thickness by ultrasound, if the consumption was higher than the norms (I don't remember well but I think 12-20%) the sheet of the strip must be replaced.

 

[Exatem]

curious the bulb of the last image. .

There are countless forms, look at this for example:View attachment 23302

 

[sampom]

There are countless forms, look at this for example:

I'll show you what I'm trying to do.

greetings
Mar

 

[maxopus]

the last bulb posted in photo by exa I really like.
Stay well... and sleep.
The cursed modeler is doing something that will take a little more time but, it will be high.

 

[Exatem]

always remaining in the issue of welds/folds in critical areas, in this photo it is seen quite well as curved decoys and joined the sheets forming a bulb.

 

[PaoloColombani]

It is interesting that the sheets undergo a wear that reduces the thickness. after measuring the residual thickness by ultrasound, if the consumption was higher than the norms (I don't remember well but I think 12-20%) the sheet of the strip must be replaced.

Hello exatem, interesting this fact. which parts of the hull undergo such severe wear? ... and because of what action?

 

[Exatem]

Hello exatem, interesting this fact. which parts of the hull undergo such severe wear? ... and because of what action?

Hello, Paul.
I would say that the main enemy of a ship is corrosion. due to trivial rust, and especially from galvanic currents.
the layer of rust forming, is not compact. corrosion also continues under the surface layer forming plaques that detach.
It is used to protect hull with anti-rust paints after sandblasting, chemical decoupling and phosphating, but it is not enough (the so-called passive defense).
preventive means are the choice of construction materials that must be as homogeneous as possible, the design of links that do not favor the stagnation of moisture and that avoid overlapping of welding cords, surface protection and active protections.
for an active form of defense, it is used to protect hull and other parts with zinc anodes (the so-called "sacrificing") but I can assure you that the damage there are equally and are sometimes very serious.
another cause of corrosion is, and it seems strange said so, the non-use of the ship. It had to intervene not seldom, with the doubling of living work plates that made water, on abandoned units waiting for demolition.

If I recover some photos of limit cases, I see to post them.

 

[Exatem]

I recovered part of a table of the development of a modern unit. I have limited myself to the prora area but should make the idea.
Hi.

 

[Exatem]

returning to the bulbs, as you can see sometimes they also have a purely "lude" function.

 

[PaoloColombani]

I would say that the main enemy of a ship is corrosion. due to trivial rust, and especially from galvanic currents.

in practice a natural electroerosion.

... in short, apparently sea water is the predator, iron is the prey; in the end it always finds the way to eat it.
thanks to the interesting and attentive explanations:wink:

 

[Fulvio Romano]

I recovered part of a table of the development of a modern unit. I have limited myself to the prora area but should make the idea.
Hi.View attachment 14608

attention, drawing is not a constructive. the bandage is developed only in height and not in length.

returning to the bulbs, as you can see sometimes they also have a purely "lude" function.View attachment 14609

This is wonderful... I can take the picture and send it around? or is there any kind of copyright?

 

[Exatem]

attention, drawing is not a constructive. the bandage is developed only in height and not in length.
This is wonderful... I can take the picture and send it around? or is there any kind of copyright?

1) Yes but the length if you know the order range... .
2) What do I know? I found it on the net...

 

[Fulvio Romano]

1) Yes but the length if you know the order range... .

What I wanted to say is that with that design you can't cut the sheets, and even buy the material. vertically the sheet is developed, in length it is projected, in fact as you say, the range of orders is constant. in practice the ordered are "vertical", while the track of orders on the undeveloped sheets is not vertical at all.

I found myself with these drawings, but I never understood what they can serve... who explains me?

 

[maxopus]

What I wanted to say is that with that design you can't cut the sheets, and even buy the material. vertically the sheet is developed, in length it is projected, in fact as you say, the range of orders is constant. in practice the ordered are "vertical", while the track of orders on the undeveloped sheets is not vertical at all.

I found myself with these drawings, but I never understood what they can serve... who explains me?

I think that the vertical order once projected on the surfaces of the hull give you the opportunity to proceed later with the developments ... if I did not understand badly.

 

[Exatem]

I think that the vertical order once projected on the surfaces of the hull give you the opportunity to proceed later with the developments ... if I did not understand badly.

I refer to the manual of the naval technician - cafiero - and 1926"for the approximate estimate calculation of size and weight, it is advisable to work on the development of the bandage obtained, extending that of each rib on its track in the diam. longit plan, starting from the keel remained unchanged as a line configuration... "follows drawing as the previously posted one.

 

[Exatem]

Also from the drawing, if you look for example the first high sheet, goes from the order 105 -300 to the 124+500. if the range is for example 600mm, the orderly interested are (if I did not count wrong) 19 + 800mmm, then the sheet is 12200mm long.

 

[Exatem]

always remaining on the subject, I found another definition very similar, indeed equal, to the previous:for a prior and approximate evaluation of the material necessary for the realization of the strip, the development obtained is used by extending on the longitudinal profile: the keel, the straights of prora and stern and the developments of all the ordered, brought on the traces of these on the longitudinal plane from the keel remained unchanged in its configuration.

 

[Fulvio Romano]

Okay, so you need to make the maximum count on the material?

 

[Exatem]

Okay, so you need to make the maximum count on the material?

in the first line yes, then the text continued saying that more accurate reliefs are made, but always increasing the values of 0.5-1%, on large scale models of the hull.
I don't know exactly how to do it. I have seen replacing plates to ships to the works (many even chiodates) but it was easier because measurements were made "to the truth" when not even wooden blades (in the case of the kiodates were reported all the positions of the holes). then counts a lot of the tracker's "manic" (at least once when software didn't help you in tracking). However, since the subject is concerned, I'll see if I can find more information.
Bye.

 

[Fulvio Romano]

when I made the moby the part to rebuild was practically impossible to detect. They gave me those drawings, but I didn't know what they could be useful to me. Instead I used the building plan and I found the form of the anti-ollision wallpaper that had remained integral. I reconstructed the hull from the construction plan, after verifying that it was correctly aligned with the existing ship (position and tangences), I went on until prora.

for many single-curve sheetings or attributable to them, it was quite obvious to make the calculation of the material and prepare the nesting tables. for that strongly double curvature, I started with putting a lot of overmetal, and the welders bested me.... they turned against me, then I decided to develop the hand plates, because I had no software that would do it in a credible way (and above all I did not know this forum!). the result was more than great.