DESC:FIELD OF INVENTION:
[001] The present invention generally relates to a jig for manufacturing the circular frames of the submarine. More particularly, the present invention relates to a jig for welding of T-cross-section of circular frames of the submarine, which ensures the integration of web and flange elements while preventing distortion during welding.

BACKGROUND OF THE INVENTION:
[002] In the construction of submarines, the structural integrity of circular frames, composed of web and flange elements, is crucial for overall performance and safety. These frames, forming the backbone of a submarine's structure, must meet stringent dimensional and circularity requirements to ensure optimal performance and safety in demanding underwater environments.

[003] Traditional manufacturing processes for submarine frames, especially those involving manual welding, often encounter challenges related to distortion during the welding and integration of web and flange elements. This distortion is especially noticeable when dealing with thin sections, where exact alignment is required to achieve stringent dimensions. The distortion not only affects the circularity of the frames but also necessitates time-consuming mechanical rectification processes post-welding.

[004] KR20130001397U describes a jig device for manufacturing a structural reinforcing ring of the ship to facilitate the production of the structural reinforcing ring of the ship, the jig device for manufacturing a structural reinforcing ring of the ship of the present invention, a jig device for manufacturing a structural reinforcing ring of the ship, a plurality of guide members are arranged to be divided radially at equal angle intervals; The guide member includes a plurality of fixing holes formed at positions corresponding to the outer diameter of each structural reinforcing ring so that the web segments are arranged in a circular shape according to the size of the structural reinforcing ring to be manufactured.
[005] The aforementioned prior art facilitates the positioning of web segments in a circular shape, it does not provide the level of precision and control required for high-precision fabrication, particularly in ensuring precise alignment and welding of web and flange elements and not effectively prevent distortion during the welding process, especially in thin sections commonly used in submarine frame construction.

[006] Therefore, there is a need for specialized manufacturing jig which enhances the precision and efficiency of submarine frame manufacturing.

SUMMARY OF INVENTION:
[007] The present invention pertains to a jig designed for the high-precision manual fabrication of T-cross-section of circular frames for small submarines and facilitates the integration of web and flange elements while preventing distortion during welding.

[008] The main object of the present invention is to provide a jig for manufacturing circular frames that prevent distortion in any direction during the welding process.

[009] Another object of the present invention is to provide a jig for manufacturing circular frames that maintain the circularity and structural integrity of the frames without the need for extensive post-welding rectification.

[010] Yet another object of the present invention is to provide a jig for manufacturing circular frames that facilitate the seamless integration of web and flange elements during the manufacturing process.

BRIEF DESCRIPTION OF THE INVENTION:
[011] The invention has other advantages and features which will be more readily apparent from the following detailed description of the invention and the appended claims, when taken in conjunction with the accompanying drawings, in which:
Fig 1 Illustrates the jig for manufacturing the circular frames of the submarine.

DETAILED DESCRIPTION OF THE INVENTION:
[012] While the invention has been disclosed with reference to certain embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt to a particular situation or material to the teachings of the invention without departing from its scope.

[013] Throughout the specification and claims, the following terms take the meanings explicitly associated herein unless the context clearly dictates otherwise. The meaning of "a", "an", and "the" include plural references. The meaning of "in" includes "in" and "on." Referring to the drawings, like numbers indicate like parts throughout the views. Additionally, a reference to the singular includes a reference to the plural unless otherwise stated or inconsistent with the disclosure herein.

[014] The figures and protocols have been represented where appropriate by conventional representations in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skilled in the art having benefit of the description herein.

[015] The present invention discloses a jig for manufacturing of T-cross-section of circular frames for small submarines and facilitates the alignment and welding of both web and flange elements of the circular frames.

[016] As illustrated in Fig.1, the jig 10 comprises a ring-shaped plate 1, a ring-shaped plate 1 is attached to the plurality of supportive legs 2, and a plurality of clamps 3 are coupled to the ring-shaped plate 1 through the plurality of reamer bolts 4. In a preferred embodiment according to the present invention, said jig 10 for high-precision fabrication, assembly, welding, and distortion control of T-cross-section circular frames for submarines comprises, a ring-shaped plate 1, configured to provide a platform for welding; a plurality of supportive legs 2 attached to said ring-shaped plate 1; and a plurality of clamps 3 coupled to said ring-shaped plate 1 through a plurality of reamer bolts 4; wherein said jig 10 is configured to facilitate the alignment and welding of both web and flange elements of the circular frames.

[017] In a same preferred embodiment, the jig 10 is provided in the form of a robust metallic structure meticulously designed for the assembly, welding, and distortion control of circular frames. The said jig 10 is made of a robust metallic material selected from the group consisting of carbon steel, to provide rigidity and minimize deformation during the welding process.

[018] In a same preferred embodiment, said plurality of clamps 3 are selected from Z- clamp, and L-clamps to prevent distortion in all directions during the fabrication process.

[019] In a same preferred embodiment, a method of fabricating circular frames using a jig 10 comprises the step of:
Step a: Assembly of Web Pieces;
Step b: Assembly of Flange Pieces;
Step c: Securing of combined Frame Assembly with clamps;
Step d: Complete Welding of Frame; and
Step e: Stress Relieving.

[020] In an embodiment, the jig 10 ensures adherence to stringent quality standards for circular frames, including a circularity requirement of 0.5% of the radius and dimensional tolerance of less than 1 mm.

[021] In an embodiment, the jig 10 allows for the fabrication of frames with various radii which can be achieved by replacing the ring-shaped plate 1 and adjusting the position of the plurality of clamps 3.

[022] In an embodiment, the jig 10 enables the high-precision manual manufacturing of T-cross-section of circular frames for small submarines.

[023] Although a particular exemplary embodiment of the invention has been disclosed in detail for illustrative purposes, it will be recognized by those skilled in the art that variations or modifications of the disclosed invention, including the rearrangement in the configurations of the parts, changes in steps and their sequences may be possible. Accordingly, the invention is intended to include all such alternatives, modifications, and variations as may fall within the spirit and scope of the present invention.

[024] The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching.

ADVANTAGES OF THE INVENTION
[025] The present invention provides a jig that ensures precise alignment and welding of web and flange elements, meeting stringent dimensional and circularity standards.
[026] The present invention provides a jig that minimizes the risk of deformities in the frames, maintaining their circularity and structural integrity without the need for extensive post-welding rectification.

[027] The present invention provides a jig that aaccommodates different frame sizes and configurations, enhancing flexibility and adaptability in manufacturing.
[028] The present invention provides a jig that minimizes distortion during welding and eliminates the need for extensive post-welding rectification.

[029] The present invention provides a jig that offers a cost-effective manufacturing process with reduced material waste and labor hours.
,CLAIMS:1. A jig 10 for high-precision fabrication, assembly, welding, and distortion control of T-cross-section circular frames for submarines comprising,
- a ring-shaped plate 1, configured to provide a platform for welding;
- a plurality of supportive legs 2 attached to said ring-shaped plate 1; and
- a plurality of clamps 3 coupled to said ring-shaped plate 1 through a plurality of reamer bolts 4;
wherein said jig 10 is configured to facilitate the alignment and welding of both web and flange elements of the circular frames.

2. The jig 10 as claimed in claim 1, wherein said plurality of clamps 3 are selected from Z-clamp and L-clamps to prevent distortion in all directions during the fabrication process.

3. The jig 10 as claimed in claim 1, wherein said jig 10 is adapted to accommodate different frame sizes by replacing the ring-shaped plate 1 and adjusting the position of the plurality of clamps 3.

4. The jig 10 as claimed in claim 1, wherein said jig 10 is made of a robust metallic material selected from the group consisting of carbon steel, to provide rigidity and minimize deformation during the welding process.

5. A method of fabricating circular frames using a jig 10 comprises the step of:
Step a: Assembly of Web Pieces;
Step b: Assembly of Flange Pieces;
Step c: Securing of combined Frame Assembly with clamps;
Step d: Complete Welding of Frame; and
Step e: Stress Relieving.