Ships – Building – Sectional
Patent
1982-01-22
1985-01-01
Basinger, Sherman D.
Ships
Building
Sectional
114 65R, 29429, B63B 302
Patent
active
044910819
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to shipbuilding and more particularly to methods for assembling complete modules of multideck ship hulls.
A complete module is a rigid structure assembled from sections of bottom, 'tween decks, upper deck and sides. The breadth of a complete module is equal to that of the ship hull, the height thereof is equal to the hull height, whereas the length of the module depends on the longitudinal division of the ship hull into modules.
The complete modules are then assembled into a middle body of a multideck ship.
DESCRIPTION OF THE PRIOR ART
At the present time known in the art is a method for assembling a module of a multideck ship from sections and blocks, disclosed in Japanese Pat. No. 52-49633, according to which a module is assembled in the following sequence.
First, bottom sections are delivered to the assembly location.
Then, starboard and port sections are installed in succession on both sides and joined to the bottom sections. After which fully outfitted 'tween deck sections are mounted beginning with the last one, and finally an upper deck section is installed.
All the section erection operations are accomplished with the use of cranes.
The sections are joined together with the use of any known technique providing a permanent connection, for example welding.
However, such methods for assembling a complete module with the use of traditional cranes suffer from a poor mechanization of hull assembly operations and require much time for constructing a module as the assembly and outfitting operations should be fulfilled simultaneously.
SUMMARY OF THE INVENTION
The present invention is essentially aimed at providing a method for assembling a complete module which by virtue of changing the sequence of production operations would make it possible to separate the operations pertaining to the outfitting of sections of decks, bottom and sides from the operations pertaining to the assembly of a complete module, thereby reducing the time required for construction of a complete module.
This aim is attained by a method for assembling a complete module of a multideck ship, comprising sections of bottom, 'tween decks, upper deck and sides, whereby the sections are installed in the assembly location and joined together. According to the invention, first the upper deck section is installed in the module assembly location, the it is lifted to a height exceeding the height of the first 'tween deck section, said first 'tween deck section is introduced under the upper deck section and they are joined together. After this the assembled portion of the complete module is lifted to a height exceeding the height of the second 'tween deck, said second tween deck is introduced under the assembled portion of the module and joined thereto. Then following the indicated procedure the remaining 'tween deck sections are installed and joined to the already assembled portion of the module.
This makes it possible to carry out an overall mechanization of assembly of the complete modules and to markedly increase the degree of functional outfitting of hull structures (decks, bottom and sides), as well as to transfer the majority of outfitting work from the assembly location to specialized production bays, thereby separating the hull assembly work from the outfitting work.
It is expedient after assembling all the deck sections to first install a bottom section and join it to the assembled portion of the module; after which to install side sections and join them to the assembled portion of the module, making up a complete module of a multideck ship hull.
This makes it possible to separate the assembly of the module middle portion involving labour-consuming outfitting work from the work for assembly of side sections of an intricate configuration with the subsequent connection thereof into the complete module. Such sequence of assembly is the most expedient from the standpoint of production process considering the adopted scheme of cutting-out the shell plating of the ships featuring intricate hul
REFERENCES:
patent: 1418510 (1922-06-01), Alexander
patent: 1559807 (1925-11-01), Thaden
patent: 3253565 (1966-05-01), Mangone
patent: 3429288 (1969-02-01), Suit
Basinger Sherman D.
Sotelo Jesus D.
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