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:
ROLLING SYSTEM FOR ROLLING OF FLAT BAR FOR COAMING

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 particularly describes the invention and the manner in which it is
to be performed.
CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY
[001] The present application claims priority from Indian provisional application no. 201821046439 filed on 07th December 2018.
TECHNICAL FIELD
[002] The present subject matter described herein, in general, relates to a rolling system for rolling of flat bar for coaming.
BACKGROUND
[003] Generally, in the process of metal forming of parts, there is a continuous process which requires adjustment and realignment according to the thickness required. This is because of change in the bending time for bars per coaming as well as the top and bottom dyes of the machine that need to be changed as per the requirement of the user. There is also a resultant time lag between the forming of two bars. It is to be noted that the rolling of bar for coamings may be performed on Rolling Machines, Press Brake Machines and Hydraulic Press Machines. It is to be noted that various tools have been proposed to solve this problem but have met with but limited success. This has been due in part to the tools either being of complex and costly design, failing to have a marking system, without any adjustments and also resulting in decreased productivity and time-consuming.
SUMMARY
[004] Before the present apparatus is described, it is to be understood that this application is not limited to the particular machine or apparatus, as there can be multiple possible embodiments that are not expressly illustrated in the present disclosures. It is also to be understood that the terminology used in the description is for the purpose of describing the particular versions or embodiments only and is not intended to limit the scope of the present application. This summary is provided to introduce aspects related to a winch to drop an object, and the aspects are further elaborated below in the detailed description. This summary is not intended to identify essential features of the proposed subject matter nor is it intended for use in determining or limiting the scope of the proposed subject matter.
[005] The present subject matter describes a rolling system for rolling of flat bar for coaming. The rolling system may comprise at least two bottom rollers arranged in a horizontal line. The rolling system may further comprise a top roller arranged above the at least two bottom rollers. The rolling system may further comprise at least one motor configured to drive a gear box, wherein the gear box provides rotational motion to at least two bottom rollers. The rolling system may further comprise a slant bar. The rolling system may further comprise at least one vertical linkage attached with at least one a horizontal linkage. The vertical linkage and the horizontal linkage are rigidly connected to form an angled linkage wherein said angled linkage is pivotally connected to said slant bar at pivot joint. The rolling system may further comprise at least one hydraulic jack configured to oscillate said angled linkage against the pivotal joint to facilitate upward and downward motion to the top roller. The rolling system may further comprise at least one vertical base platform configured to mount at least two bottom rollers.
BRIEF DESCRIPTION OF THE DRAWINGS
[006] The foregoing summary, as well as the following detailed description of embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the disclosure, there is shown in the present document example constructions of the disclosure, however, the disclosure is not limited to the specific methods and apparatus disclosed in the document and the drawing.
[007] The detailed description is described with reference to the accompanying figures. In the figure, 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 drawing to refer like features and components.
[008] Figure 1 represents a perspective view of a rolling system 100, in accordance with an embodiment of the present subject matter.
[009] Figure 2 illustrates a back view 200 of a rolling system 100, in accordance with an embodiment of the present subject matter.
[0010] Figure 3 illustrates a side view 300 of a rolling system 100, in accordance with an embodiment of the present subject matter.
[0011] Figure 4 illustrates various components from the perspective view of a rolling system 100, in accordance with an embodiment of the present subject matter.
[0012] Figure 5 illustrates various components from the perspective view of a rolling system 100, in accordance with an embodiment of the present subject matter.
[0013] The figure depicts various embodiments of the present disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the rolling system 100 illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
[0014] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising", “having”, 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 any apparatuses and methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary, apparatuses and methods are now described. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms.
[0015] 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. However, one of ordinary skill in the art will readily recognize that the present disclosure is not intended to be limited to the embodiments illustrated but is to be accorded the widest scope consistent with the principles and features described herein.
[0016] Pate list:
1. Flat bar for coaming 102
2. Motor 104
3. Vertical linkage 106
4. Horizontal linkage 108
5. Hydraulic jack 110
6. Bracket 112
7. Pivot joint 114
8. Stopper plate 116
9. Slant bar 118
10. Vertical base platform 120
11. Handle 202
12. Top roller 302
13. Bottom rollers 304
14. Restrictor 306
15. Vertical extension 402

[0017] Referring to figure 1, 2, 3, 4 and 5 representing the various perspective views, of the rolling system 100. The rolling system 100 may comprise a motor 104, a gear box (not shown in figure), a vertical linkage 106, a horizontal linkage 108, a hydraulic jack 110, a bracket 112, a pivot joint 114, a stopper plate 116, a slant bar 118, a vertical base platform 120, a handle 202, a top roller 302, bottom rollers 304, a restrictor 306 and a vertical extension 402 for rolling of flat bar 102 for coaming.
[0018] In one embodiment, at least two bottom rollers 304 may be arranged aligned in a horizontal line/pattern and the top roller 302 may be arranged above the at least two bottom rollers 304. The top roller 302 and the at least two bottom rollers 304 may be separated from each other by a predefined distance. Further, said at least two bottom rollers 304 may be mounted on front side of the vertical base platform 120 and the motor 104 and the gear box may be attached on other side of the vertical base platform 120. The motor 104 may be configured to drive the gear box. The top roller 302 may be rigidly mounted on a shaft. On one end of the shaft the handle 202 is mounted and on the other end of the shaft bearing is mounted said bearing is further mounted on the vertical extension 402 of the horizontal linkage 108. Further, the at least two bottom rollers 304 may be rigidly mounted on shafts wherein said shaft is configured to be mounted with at least one bearing intermediately and at the end with the driven means configured to be driven by said gear box for providing clockwise and anticlockwise motion to said at least two bottom rollers 304. The said bearing with shaft is further mounted on the vertical base platform 120.
[0019] Further, one end of the vertical linkage 106 and one end of the horizontal linkage 108 may be rigidly connected at one of its ends to form a right-angled linkage. The right-angled linkage may be pivotally mounted, on the slant bar 118 at the point of contact of the slant bar 118 and the right-angled linkage using the pivotal joint 114. Further, other end of the horizontal linkage 108 may be a free end and may be mounted inside the restrictor 306. The restrictor 306 may be of a U-shaped which acts as a guide the horizontal linkage 108 during its arcuate motion. The horizontal linkage 108 may be intermediately connected with the top roller 302 through the vertical extension 402. Further, other end of the vertical linkage 106 may be attached with the stopper plate 116 to restrict the reverse arcuate movement of the vertical linkage 106 of the right-angled linkage. Further, the bracket 112 may be attached with the vertical linkage 106 to provide forward arcuate movement of the vertical linkage 106 by advancement of hydraulic jack 110.
[0020] Further the hydraulic jack 110 may be configured to move in a forward and a backward direction to provide an arcuate motion to the right-angled linkage against the pivot joint 114 by applying force on the bracket 112. Due to forward motion of the hydraulic jack 110, the bracket 112 moves in forward direction. Due to the forward movement of the bracket 112, the right-angled linkage may be configured to move/rotate in an arcuate manner configured to provide a downward movement/motion to the top roller 302. Due to the arcuate motion, the horizontal linkage 108 may experience a downward motion which may further exert pressure on the top roller 302. The pressure exerted on the top roller 302 may further exert pressure on the flat bar 102 for performing rolling operation to provide a curve shape with a reduced radial section of coaming.
[0021] Further, when the pressure through the hydraulic jack 110 is applied on the bracket 112 mounted on vertical linkage 106 of the right-angled linkage, the free end of the horizontal linkage 108 may reach at bottom of the restrictor 306 which will restrict further rotation/arcuate motion of the right-angled linkage even after the advancement of the hydraulic jack 110. Further, when the pressure through the hydraulic jack 110 is released, the stopper plate 116 may be configured to stop the arcuate motion of the right-angled linkage beyond a predetermined arcuate motion.
[0022] The flat bar 102 for coaming may be inserted between the top roller 302 and the at least two bottom rollers 304 and may be configured to rotate in clockwise and anticlockwise direction for rolling of the flat bar 102 for coaming by a rotatory motion of the at least two bottom rollers 304 driven by the motor 104 and the gear box. Further, the top roller 302 also starts rotating as the flat bar 102 for coaming rolls in to and fro direction. The top roller (an idler roller) 302 rotates because of friction generated between the surfaces of top roller 302 and the flat bar 102 for coaming.
[0023] In one embodiment, the handle 202 may be connected to the one end of the shaft of the top roller 302. The handle 202 may facilitate rotation of the top roller 302 in to and fro direction by rotating the handle 202 manually during power failure. The flat bar for coaming 102 may move in to and fro direction due to the rotation of the top roller 302. Further, the at least two bottom rollers 304 may also starts rotating in the to and fro direction due to the friction between the flat bar for coaming 102 and the at least two bottom rollers 304 thereby provides, the flat bar for coaming 102, the curve shape with the reduced radial section.
[0024] Accordingly the present subject matter discloses a rolling system for rolling of flat bar for coaming, the rolling system 100 comprises: at least two bottom rollers 304 arranged in a horizontal line; a top roller 302 arranged above the at least two bottom rollers 304, at least one motor 104 configured to drive a gear box, wherein the gear box provides rotational motion to at least two bottom rollers 304, a slant bar 118; at least one vertical linkage 106 attached with at least one a horizontal linkage 108 are rigidly connected to form an angled linkage wherein said angled linkage is pivotally connected to said slant bar 118 at pivot joint 114; at least one hydraulic jack 110 configured to oscillate said angled linkage against the pivotal joint 114 to facilitate upward and downward motion to the top roller 302 and at least one vertical base platform 120 configured to mount at least two bottom rollers 304.
[0025] The top roller 302 and the at least two bottom rollers 304 are configured to be separated with each other by a predefined distance, wherein the predefined distance between the top roller 302 and the at least two bottom rollers 304 is provided to facilitate reception of a flat bar 102 for coaming. The rotational motion of the bottom rollers is configured to facilitate to and fro motion of the flat bar 102 for coaming. The said to and fro motion of the flat bar 102 is configured to provide rotational motion of the top roller 302 due to friction. The said hydraulic jack 110 configured to oscillate said angled linkage in a forward and a backward direction by providing an advancement to said vertical linkage 106 through a bracket 112.
[0026] The downward motion to the top roller 302 exerts pressure on the flat bar 102 for coaming to provide a curve shape with a reduced radial section. On one side of the vertical base platform 120 at least two bottom rollers 304 are mounted, and wherein other side of the vertical base platform 120 is mounted with the motor 104 and the gear box for providing rotational motion to said bottom rollers 304.
[0027] The top roller 302 is rigidly mounted on a shaft, wherein one end of the shaft is connected with the handle 202 and other end of the shaft is connected with bearings bearing mounted on the vertical extension 402 of the horizontal linkage 108. The handle 202 is configured to perform coaming operation of flat bar 102 by rotation of said handle 202 manually for facilitating rotation of the top roller 302 in to and fro direction during power failure.
[0028] The rotation of the top roller 302 in to and fro direction by rotation of handle is configured to provide movement of the flat bar for coaming 102 in to and fro direction by facilitating rotation of the at least two bottom rollers 304 in to and fro direction due to the friction between the flat bar for coaming 102 and the at least two bottom rollers 304 during power failure.
[0029] The two bottom rollers 304 is rigidly mounted on shafts, wherein one end of the shafts may be kept free and other end of the shafts is connected with bearings which are fitted on the vertical base platform 120, wherein further extension of the shafts is used to mount the driven gears configured to receive clockwise and anticlockwise motion to the at least two bottom rollers 304 from said gear box.
[0030] The other end of the horizontal linkage 108 is a free end and is slidably mounted inside a ‘U’ restrictor 306 which acts as stopper plate to the free end of the horizontal linkage 108 (angled linkage) in forward advancement of the hydraulic jack 110 beyond predetermined distance. The stopper plate 116 restricts the reverse arcuate motion of the right-angled linkage beyond a predetermined arcuate motion.
[0031] Although implementations for the rolling system 100 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 described. Rather, the specific features are disclosed as examples of implementation for the rolling system 100.
,CLAIMS:
1. A rolling system for rolling of flat bar for coaming, the rolling system 100 comprises:
at least two bottom rollers 304 arranged in a horizontal line;
a top roller 302 arranged above the at least two bottom rollers 304,
at least one motor 104 configured to drive a gear box, wherein the gear box provides rotational motion to at least two bottom rollers 304,
a slant bar 118;
at least one vertical linkage 106 attached with at least one a horizontal linkage 108 are rigidly connected to form an angled linkage, wherein said angled linkage is pivotally connected to said slant bar 118 at pivot joint 114;
at least one hydraulic jack 110 configured to oscillate said angled linkage against the pivotal joint 114 to facilitate upward and downward motion to the top roller 302; and
at least one vertical base platform 120 configured to mount at least two bottom rollers 304.

2. The system as claimed in claim 1, wherein said top roller 302 and the at least two bottom rollers 304 are configured to be separated with each other by a predefined distance, wherein the predefined distance between the top roller 302 and the at least two bottom rollers 304 is provided to facilitate reception of a flat bar 102 for coaming.

3. The system as claimed in claim 1, wherein said and wherein said rotational motion of the bottom rollers is configured to facilitate to and fro motion of the flat bar 102 for coaming.

4. The system as claimed in claim 1, wherein said to and fro motion of the flat bar 102 is configured to provide rotational motion of the top roller 302 due to friction.

5. The system as claimed in claim 1, wherein said hydraulic jack 110 configured to oscillate said angled linkage in a forward and a backward direction by providing an advancement to said vertical linkage 106 through a bracket 112.

6. The system as claimed in claim 1, wherein said downward motion to the top roller 302 exert pressure on the flat bar 102 for coaming to provide a curve shape with a reduced radial section.

7. The system as claimed in claim 1, wherein on one side of said vertical base platform 120 at least two bottom rollers 304 are mounted, and wherein other side of the vertical base platform 120 is mounted with the motor 104 and the gear box for providing rotational motion to said bottom rollers 304.

8. The system as claimed in claim 1, wherein the top roller 302 is rigidly mounted on a shaft, wherein one end of the shaft is connected with the handle 202 and other end of the shaft is connected with bearings bearing mounted on the vertical extension 402 of the horizontal linkage 108.

9. The system as claimed in claim 8, wherein said handle 202 is configured to perform coaming operation of flat bar 102 by rotation of said handle 202 manually for facilitating rotation of the top roller 302 in to and fro direction during power failure.

10. The system as claimed in claim 9, wherein rotation of the top roller 302 in to and fro direction by rotation of handle is configured to provide movement of the flat bar for coaming 102 in to and fro direction by facilitating rotation of the at least two bottom rollers 304 in to and fro direction due to the friction between the flat bar for coaming 102 and the at least two bottom rollers 304 during power failure.

11. The system as claimed in claim 1, wherein the at least two bottom rollers 304 is rigidly mounted on shafts, wherein one end of the shafts may be kept free and other end of the shafts is connected with bearings which are fitted on the vertical base platform 120, wherein further extension of the shafts is used to mount the driven gears configured to receive clockwise and anticlockwise motion to the at least two bottom rollers 304 from said gear box.

12. The system as claimed in claim 1, wherein other end of the horizontal linkage 108 is a free end and is slidably mounted inside a ‘U’ restrictor 306 which acts as stopper plate to the free end of the horizontal linkage 108 (angled linkage) in forward advancement of the hydraulic jack 110 beyond predetermined distance.

13. The system as claimed in claim 8, wherein the stopper plate 116 restricts the reverse arcuate motion of the right-angled linkage beyond a predetermined arcuate motion.