DESC:FORM 2

THE PATENTS ACT, 1970

(39 of 1970)

&

THE PATENT RULES, 2003

COMPLETE SPECIFICATION

(See Section 10 and Rule 13)

Title of invention:

AN ASSEMBLY UNIT FOR SHIPBUILDING

Applicant:

Mazagon Dock Shipbuilders Limited
A company Incorporated in India under the Companies Act, 1956
Under Ministry of Defence,
(A Govt. of India Undertaking)
Having address:
Dockyard Road, Mazagon,
Mumbai - 400010, Maharashtra, India

The following specification describes the invention and the manner in which it is to be performed.

CROSS-REFERENCE TO RELATED APPLICATION AND PRIORITY

[001] The present application claims priority from Indian Patent application no. (201821043996) filed on 22nd November, 2018.

TECHNICAL FIELD

[002] The present subject matter described herein, in general, relates to an assembly unit. More particularly, the assembly unit further relates for shipbuilding.

BACKGROUND

[003] Generally, an assembly unit for shipbuilding comprises a bulb bar is mounted on a deck plate. The bulb bar is a narrow plate, generally of mild steel, rolled with a bulb or swell along one of its edges. Due to this bulb bar, the strength and stiffening capacity is more as compared to flat bar. Hence, the bulb bar is used as a stiffener in shipbuilding. It is to be noted that, to mount the bulb bar on the deck plate, a pair of support structure is welded onto the deck plate. Further, it is to be noted that, the bulb bar is mounted between the two support structures in order to prevent rolling of the bulb bar. In addition, after implementation of welding the bulb bar on the deck plate, the support structures needs to be cut off from the deck plate. This leads to increase in consumption of welding consumables, increase in time for the implementation of assembly unit, increase in effort, increase in fatigue, increase in material wastage.

SUMMARY

[004] Before the present an assembly unit for shipbuilding, is described, it is to be understood that this application is not limited to the particular systems, and methodologies described, as there can be multiple possible embodiments, which are not expressly illustrated in the present disclosures. It is also to be understood that the terminology used in the description is for describing the particular implementations, versions, or embodiments only, and is not intended to limit the scope of the present application.

[005] This summary is provided to introduce aspects related to the device. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.

[006] In one embodiment, an assembly unit for shipbuilding is disclosed. The assembly unit for shipbuilding comprises a deck plate, and a holding bracket. In one embodiment, the deck plate is mounted on a frame. In another embodiment, the holding bracket has a cutout section, the cutout section may receive a bulb bar. In one another embodiment, a profile of the cutout section matches a profile of a swell side of the bulb bar. In one implementation, during assembly, the cutout section may receive the swell side of the bulb bar, through a bottom opening of the slot, further during assembly, the bulb bar with the holding bracket is mounted on the deck plate. In another implementation, the holding bracket lock the bulb bar on a surface of the deck plate.
BRIEF DESCRIPTION OF THE DRAWINGS

[007] The foregoing detailed description of embodiments is better understood when read in conjunction with the appended drawings. For the purpose of illustrating of the present subject matter, an example of construction of the present subject matter is provided as figures; however, the invention is not limited to the specific system disclosed in the document and the figures.

[008] The present subject matter is described in detail with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to refer various features of the present subject matter.

[009] Figure 1 illustrates a holding bracket, in accordance with an embodiment of the present subject matter.

[0010] Figure 2 illustrates an assembly unit comprising a bulb bar and a holding bracket, in accordance with an embodiment of the present subject matter.

DETAILED DESCRIPTION

[0011] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising," "having," "containing," and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Although a device, similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, is now described. The disclosed embodiments for the device is merely example of the disclosure, which may be embodied in various forms.

[0012] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments for the assembly unit. However, one of ordinary skill in the art will readily recognize that the present disclosure for the device is not intended to be limited to the embodiments described, but is to be accorded the widest scope consistent with the principles and features described herein.

[0013] In one embodiment, an assembly unit for shipbuilding is disclosed. The assembly unit for shipbuilding comprises a deck plate, and a holding bracket. In one embodiment, the deck plate is mounted on a frame. In another embodiment, the holding bracket has a cutout section, the cutout section may receive a bulb bar. In one another embodiment, a profile of the cutout section matches a profile of a swell side of the bulb bar. In one implementation, during assembly, the cutout section may receive the swell side of the bulb bar, through a bottom opening of the slot, further during assembly, the bulb bar with the holding bracket is mounted on the deck plate. In another implementation, the holding bracket lock the bulb bar on a surface of the deck plate.

[0014] Now, referring to Figures 1-2, Figure 1 illustrates a front view 100 of a holding bracket 102. Figure 2 illustrates an assembly unit 200 comprising a bulb bar 204 and a holding bracket 102.

[0015] In one embodiment, the assembly unit 200 for shipbuilding comprises a deck plate 202, and a holding bracket 102. The deck plate 202 may be mounted on a frame. A bottom surface of the frame may be fixed on one end of a plurality of vertical columns. Further, the other end of the plurality of vertical columns may be fixed on a ground. In one aspect, the plurality of vertical columns are spaced at an equal distance from each other. In one implementation, the frame may be fixed onto the plurality of vertical columns by welding. The frame may comprise a plurality of rectangular frames. The plurality of rectangular frames may be equal in size. In another implementation, a deck plate 202 may be welded or mounted on an upper part of the frame.

[0016] In yet another embodiment, the assembly unit 200 comprising the holding bracket 102 has a cutout section. The cutout section may receive a bulb bar 204. The bulb bar 204 may be inserted manually into the holding bracket 102. In one aspect, a profile of the cutout section matches a profile of a swell side of the bulb bar 202. In another aspect, the holding bracket 102 may comprise one or more cut-out sections in order to match one or more profiles of the swell side of the bulb bar 202 in order to insert variable size bulb bars into the holding bracket 102. The holding bracket 102 may lock the bulb bar in a position, thus preventing rolling off the bulb bar 204 from the deck plate 202 on a surface, due to a predefined thickness of the holding bracket 102. The surface may be to form a hull of a ship. In another implementation, upon inserting the bulb bar 204 into the holding bracket 102, during assembly, the bulb bar 204 with the holding bracket 102 is mounted on the deck plate 202. In another implementation, the bulb bar 204 may be tack welded to the deck plate 202. The tack welding may be the welding used to hold the components in a proper location. The tack welding may ensure the dimensional stability before actual welding starts.

[0017] In one another implementation, after tack welding, the holding bracket 102 may be removed by sliding the holding bracket 102 from the bulb bar 204. Further, a running welding may be implemented for final fitment of the bulb bar 204 on the deck plate 202, thereby formation of the assembly unit 200 for shipbuilding.

[0018] Exemplary embodiments discussed above may provide advantages, these may include the following.

[0019] Some embodiments of the assembly unit requires less effort and less time for the implementation or mounting of the bulb bar.

[0020] Some embodiments of the assembly unit has reduction in consumables required for welding.

[0021] Some embodiments of the assembly unit has increase in housekeeping and aesthetic view of the shop.

[0022] Some embodiments of the assembly unit reduces fatigue.

[0023] Although implementations for the assembly unit 200 have been described in language specific to structural features and/or methods, it is to be understood that the appended claims are not necessarily limited to the specific features or methods described. Rather, the specific features and methods are disclosed as examples of implementation for the assembly unit 200.

,CLAIMS:

1. An assembly unit (200) for shipbuilding, the assembly unit (100) comprises:
a deck plate (202), wherein the deck plate (202) is mounted on a frame; and
a holding bracket (102), wherein the holding bracket (102) has a cut-out section (104), wherein the cut-out section (104) is configured to receive a bulb bar (204), wherein a profile of the cut-out section matches a profile of a swell side of the bulb bar (204);
wherein during assembly, the cut-out section is configured to receive the swell side of the bulb bar (204), through a bottom opening of the slot, further during assembly, the bulb bar (204) with the holding bracket (102) is mounted on the deck plate (202), wherein the holding bracket (102) is configured to lock the bulb bar (204) on a surface of the deck plate (202).

2. The assembly unit (200) as claimed in claim 1, wherein the bulb bar (204) is tack welded to the deck plate (202).

3. The assembly unit (200) as claimed in claim 1, wherein the holding bracket (102) is removed by sliding the holding bracket (102) from the bulb bar (204) after tack welding.

4. The assembly unit (200) as claimed in claim 1, wherein the assembly unit (200) comprises a plurality of vertical columns, wherein one end of the plurality of vertical columns is fixed to the frame and other end is mounted on a ground, wherein the plurality of vertical columns are spaced at an equal distance from each other.

5. The assembly unit (200) as claimed in claim 1, wherein the holding bracket (102) comprises one or more cut-out sections in order to match one or more profiles of the swell side of the bulb bar (204).