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:
VERTICAL MAGNETIC HOLDING FIXTURE FOR FERROUS PLATES

Applicant:
BEML Limited
A company Incorporated in India under the Companies Act, 1956
Having Address As:
BEML Soudha, 23/1, 4th Main,
Sampangirama Nagar, Bengaluru - 560 027,
Karnataka, 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 invention claims priority from Indian patent application numbered IN 202241046194 filed on 12th August, 2022.
FIELD OF THE INVENTION
[002] The present subject matter described herein, in general, relates to a magnetic fixture for holding a ferrous plate vertically and more particularly relates the magnetic fixture that provides adequate clamping force to hold the ferrous plate for machining.
BACKGROUND OF THE INVENTION
[003] Numerous machining systems exist for milling, drilling and cutting a workpiece. In such systems, suitable fixture is used to hold the workpiece within the system in order for it to be machined. Conventionally the workpiece is held or clamped within the machining system fixture means which grips and presses against the workpiece to hold it in position. The fixture must secure the workpiece in place during the machining operation and must prevent movement of the workpiece when subjected to the machining loads. Further, the fixture should not cause damage to the workpiece and must allow easy access to the workpiece while machining. Furthermore, the fixture should be secured such that the workpiece can be rapidly and easily installed and removed from the fixture and the machining system in order to improve overall processing efficiency.
[004] The conventional fixtures do not provide sufficient clamping force to the workpiece specifically plate type workpiece, which is to be machined and does not allow easy access to the plate for machining. Moreover, while performing face-milling operations on a flat plate on a currently available fixtures, the machined surface tend to have a poor surface finish due to inadequate clamping. Further, the machined surface contains chattering marks and have uneven thickness. Therefore, there is a need to provide adequate clamping force to the workpiece for improving the surface finish and to avoid chattering marks on the workpiece.

OBJECT OF THE INVENTION
[005] The main object of the invention is to provide a magnetic fixture for holding vertical ferrous plate.
[006] Another object of the invention is to provide a fixture comprising of permanent magnets with blocks to provide adequate clamping force to hold a ferrous plate for machining operations.
[007] Yet another object of the invention is to improve a surface finish of ferrous plate machined on a magnetic fixture.
[008] Yet another object of the invention is to machine a vertical ferrous plate without any cutter marks and chattering issues.
[009] Yet another object of the invention is to machine a vertical ferrous plate with uniform thickness.
STATEMENT OF THE INVENTION
[0010] Accordingly, the present subject matter relates to a magnetic holding fixture for ferrous plate comprising of a base plate, a plurality of ribs, at least one side support plate along with the rib are configured to be fixedly secured on the base plate to axially support the ferrous plate, at least one magnet block along with the rib is configured to be fixedly secured on the base to provide a clamping force to the ferrous plate and at least one supporting pad configured to provide a seating support to the ferrous plate in vertical position. Said fixture is configured for performing milling operation on the ferrous plate. Said magnetic fixture is configured for performing milling operation on the ferrous plate without cutter and chattering marks. Said magnet block is configured to be a permanent magnet. The fixture is configured to be mounted on a horizontal boring, milling, facing machine. Further, the side support plates, the wedge shaped ribs, the permanent magnet with blocks and the supporting pad are configured to be welded in a predefined positions on the base plate. Furthermore, said clamping force is configured to be uniform in an entire area of the ferrous plate. The ferrous plate size is configured to be 1000mmx1000mm and the ferrous plate thickness is configured to be up to 32 mm.
SUMMARY
[0011] Before the present system and method are described, it is to be understood that this application is not limited to the particular machine or an apparatus, and methodologies described, as there can be multiple possible embodiments that are not expressly illustrated in the present disclosure. 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 magnetic fixture for holding the plate vertically to perform machining operation on the plate, and the aspects are further elaborated below in the detail description.
[0012] In one implementation, a magnetic holding fixture for ferrous plates wherein said fixture comprises of permanent magnets for holding the ferrous plate in vertical position to perform milling operation on the ferrous plate. The magnetic holding fixture further comprises of a base plate, side support plates, wedge shaped ribs, permanent magnets with blocks and supporting pad. The side support plate along with the wedge shaped ribs is mounted on the base plate for providing axial support to the ferrous plate, the permanent magnets with block is configured to provide clamping force to the ferrous plate and the supporting pad provide seating support for the ferrous plate. The permanent magnets on the fixture provide adequate clamping force for holding the ferrous plate thereby improves a surface finish of the ferrous plate. Moreover, the magnetic holding fixture enables machining of the ferrous plate in vertical position without any cutter marks and chattering issues.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The foregoing summary, as well as the following detailed description of embodiment, is better understood when read in conjunction with the appended drawing. 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.
[0014] The detailed description is described with reference to the accompanying figure. 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.
[0015] Figure 1 illustrates a top view of a magnetic holding fixture to hold plate vertically, in accordance with the present invention.
[0016] Figure 2 illustrates a side view of a magnetic holding fixture to hold plate vertically, in accordance with the present invention.
[0017] Figures depicts various embodiments of the present disclosure for purpose of illustration only. Only skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
[0018] 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. Although any systems 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, systems and methods are now described. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms.
[0019] Various modifications to the embodiments will be readily apparent to those skilled in the art and the generic principles herein may be applied to another embodiment. 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.
[0020] Thus, the present invention describes a magnetic holding fixture for ferrous plates wherein the fixture is provided with permanent magnets for holding the ferrous plates vertically to perform milling operation on said ferrous plates. The magnetic fixture for holding the ferrous plate consists of a base plate, side support plates, wedge shaped ribs, permanent magnets with blocks and supporting pad. The permanent magnets with blocks on the fixture provide adequate clamping force for holding said ferrous plate to improve the surface finish of the ferrous plate. Moreover, the magnetic fixture enables machining of the ferrous plate in vertical position without any cutter marks and chattering issues.
[0021] Now referring to Figure 1 and 2, it shows a magnetic fixture (10) for holding the ferrous plate vertically comprising of a base plate (1), side support plates (2), permanent magnet with blocks (3), wedge shaped ribs (5) and supporting pad (4). The side support plates (2) along with the wedge shaped ribs (5) are welded in a predefined positions on the base plate (1). Similarly, the permanent magnet with blocks (3) and the supporting pad (4) are welded in the predefined positions on the base plate (1). The side support plate (2) along with wedge shaped ribs (5) is mounted on base plate (1) to axially support the ferrous plate. Further, the permanent magnets with blocks (3) mounted on the magnetic fixture (10) provide a clamping force to securely hold the ferrous plate for performing machining operation. Moreover, the supporting pad (4) on the magnetic fixture (10) provides seating support to the ferrous plate. In one of the embodiment, the magnetic fixture (10) is loaded on the horizontal boring machine for providing clamping to the ferrous plate vertically. On loading the ferrous plate on to the magnetic fixture (10) before performing milling operation, the supporting pad (4) and side support plates (2) provides support to the loaded plate and the permanent magnets with blocks (3) provide the clamping force to hold the plate vertically.
[0022] In one of the embodiments, the ferrous plate thickness is of up to 32mm and the size of 1000mmx1000mm which is loaded vertically on the magnetic fixture (10). However, the size of ferrous plates can be altered for machining plates of different sizes. The clamping force is uniform in an entire area of the ferrous plate and an entire face of the ferrous plate is machined without any chattering marks.
[0023] Further, the present subject matter relates to a magnetic holding fixture (10) for ferrous plate comprising of a base plate (1), a plurality of ribs (5), at least one side support plate (2) along with the rib (5) are configured to be fixedly secured on the base plate (1) to axially support the ferrous plate, at least one magnet block (3) along with the rib (5) is configured to be fixedly secured on the base (1) to provide a clamping force to the ferrous plate and at least one supporting pad (4) configured to provide a seating support to the ferrous plate in vertical position. Said fixture (10) is configured for performing milling operation on the ferrous plate. Said magnetic fixture (10) is configured for performing milling operation on the ferrous plate without cutter and chattering marks. Said magnet block (3) is configured to be a permanent magnet with blocks. The fixture (10) is configured to be mounted on a horizontal boring, milling, facing machine. Further, the side support plates (2), the wedge shaped ribs (5), the permanent magnet with blocks (3) and the supporting pad (4) are configured to be welded in a predefined positions on the base plate (1). Furthermore, said clamping force is configured to be uniform in an entire area of the ferrous plate. The ferrous plate size is configured to be 1000mmx1000mm and the ferrous plate thickness is configured to be up to 32 mm.
[0024] Further, the invention can be used, but not limited to, in the following applications.
[0025] Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.
[0026] The magnetic fixture provides vertical clamping of the ferrous plate.
[0027] The fixture with permanent magnets with blocks is used to hold the ferrous plate on the horizontal boring machine.
[0028] The vertical plate holding magnetic fixture with blocks provides clamping uniformity and consistency, low maintenance, flexibility and speed.
[0029] The vertical holding of the ferrous plate provides enhanced surface finish to the ferrous plate without any cutter and chattering marks.
[0030] Some embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.

[0031] REFERENCE NUMERALS
Element Description Reference Numerals
Base plate 1
Side support plate 2
Permanent magnet with blocks 3
Supporting pad 4
Wedge shaped ribs 5
Magnetic Fixture 10
,CLAIMS:1. A magnetic holding fixture (10) for ferrous plate comprising:
a base plate (1);
a plurality of ribs (5);
at least one side support plate (2) along with the rib (5) are configured to be fixedly secured on the base plate (1) to axially support the ferrous plate;
at least one magnet block (3) along with the rib (5) is configured to be fixedly secured on the base (1) to provide a clamping force to the ferrous plate; and
at least one supporting pad (4) configured to provide a seating support to the ferrous plate in vertical position.

2. The magnetic holding fixture for ferrous plates as claimed in claim 1, wherein said fixture is configured for performing milling operation on the ferrous plate.

3. The magnetic holding fixture for ferrous plates as claimed in claim 1, wherein said magnetic fixture is configured for performing milling operation on the ferrous plate without cutter and chattering marks.

4. The magnetic holding fixture for ferrous plates as claimed in claim 1, wherein said magnet (3) is configured to be a permanent magnet with blocks.

5. The magnetic holding fixture for ferrous plates as claimed in claim 1, wherein the fixture is configured to be mounted on a horizontal boring, milling, facing machine.

6. The magnetic holding fixture for ferrous plates as claimed in claim 1, wherein the side support plates (2), the wedge shaped ribs (5), the permanent magnet with blocks (3) and the supporting pad (4) are configured to be welded in a predefined positions on the base plate (1).

7. The magnetic holding fixture for ferrous plates as claimed in claim 1, wherein said clamping force is configured to be uniform in an entire area of the ferrous plate.

8. The magnetic holding fixture for ferrous plates as claimed in claim 1, wherein the ferrous plate size is configured to be 1000mmx1000mm.

9. The magnetic holding fixture for ferrous plates as claimed in claim 1, wherein the ferrous plate thickness is configured to be up to 32 mm.