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:
A FIXTURE ASSEMBLY FOR LATHE TO PRODUCE HELICAL OIL GROOVE IN A BEARING AND METHOD THEREOF

Applicant:
BEML Limited
A company Incorporated in India under the Companies Act, 1956
Having address:
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 202241058376 filed on 12th October, 2022.

FIELD OF INVENTION
[002] The present subject matter described herein, in general, relates to fixture assembly for lathe to produce intricate helical oil groove and more specifically relates to fixture for lathe to produce helical oil groove in bearing of BEML Dozer BD475.

BACKGROUND OF THE INVENTION
[003] Due to the special form / shape of the component, it was difficult to hold and machine the Oil grooves using a Conventional Lathe. Previously, the bearing has to be imported where in the lead time/Import cost were more. OR oil grooves can be produced with the help of 5 axis CNC machine, where the machine hour rate will be more compared to Conventional machine.
[004] Thus, an alternative solution was to develop a Modular fixture to suit conventional lathe to produce Helical oil grooves in BD475 Bearing with required accuracy and surface finish.

OBJECTS OF THE INVENTION
[005] Main object of the present invention is to develop a fixture for lathe to produce helical oil groove by conventional method using available resource.
[006] Another object of the present invention is development of fixture for lathe to produce helical oil groove in bearing of BEML Dozer BD475 with Reduction in manufacturing cost.
[007] Yet another object of the present invention is to provide machining of two oil grooves in bearing using the same fixture.
[008] Yet another object of the present invention is to develop in house manufacturing facility as an import substitution under ATMA NIRBHAR BHARAT.

SUMMARY OF THE INVENTION
[009] Before the present system is 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 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 fixture for lathe to produce helical oil groove in bearing of BEML Dozer BD475, 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.
[0010] The present subject matter described herein, in general, relates to a fixture for lathe to produce helical oil groove in bearing of BEML Dozer BD475. The fixture is to be mounted on the spindle at a predetermined angle for machining of the grooves. The component has to be reversed by 180 degree for machining the groove on the next surface.

BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The foregoing summary, as well as the following detailed description of embodiments, 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:
[0012] 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.
[0013] Figure 1 illustrates an isometric view of the fixture with the bearing mounted on it.
[0014] Figure 2 illustrates a front view and an isometric view of the fixture with the bearing mounted on it.
[0015] Figure 3 illustrates a front view and side view of the base plate of the fixture.
[0016] Figure 4 illustrates a flow chart of the method of machining groove on the bearing surface.
[0017] Figure 5 illustrates a schematic view of the conventional lathe machine with the fixture mounted on it.
[0018] Figure 6 illustrates a front view and an isometric view of the fixture with the bearing mounted on it.
[0019] Figure 7 illustrates a bearing before the machining of grooves.
[0020] Figure 8 illustrates a bearing after the machining of grooves.
[0021] 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 structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION OF THE INVENTION
[0022] 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.
[0023] 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.
[0024] Referring to figure 1 and 2, the present subject matter is a fixture for lathe to produce helical oil groove in bearing of BEML Dozer BD475. This fixture helps to accommodate machining of two oil grooves in bearing using the same fixture. The component can be produced using a conventional lathe with the help of newly developed machining fixture.
[0025] In this machining of the grooves, the center line of the component is aligned at an angle with the spindle axis with the turning fixture. The orientation of fixture is aligned at a predetermined angle with respect to spindle axis. The machining of the groove is done with a suitable grooving tool. The component is indexed by de-clamping and reversing the component by 180 degree for machining the next surface. This ensures the groove position and improvement in the quality of groove on either side of the component.
[0026] The construction of the fixture is further explained in detail. The conventional lathe machine comprises of a spindle. A base plate (1) is mounted on the spindle. An angled plate (2) is mounted on the base plate (1) at an predefined angle. A locating plate (3) is mounted on the angled plated (2) and the bearing is mounted on the locating plate (3). A top clamp (5) is used for clamping the bearing to the fixture. A stud (6) is mounted in the center of the locating plate. A hex nut (7) is mounted on the stud (6) on the top clamp (5) to fix the bearing on the locating plate. A counter weight (4) is mounted on base plate (1) of said fixture to balance the inertial forces.
[0027] Figures 1-8 are now described using the reference numbers stated in the below table.

Reference Numeral Description
1 Base plate
2 Angle plate
3 Locating plate
4 Counter weight
5 Top clamp
6 Stud
7 Hex nut
8 Hex cap head screw
9 Cylindrical pin

,CLAIMS:
1. A fixture assembly for lathe machine to produce a helical oil groove in a bearing comprising:
a base plate (1) configured to be mounted on the chuck;
an angled plate (2) configured to be mounted on the base plate (1);
wherein the top surface of angled plate (2) is at angle with the base plate;
a locating plate (3) configured to be mounted on the top surface of angled plate (2) adapted for mounting the bearing; and
a top clamp (5) configured for clamping the bearing to the fixture.

2. The fixture assembly as claimed in claimed 1, wherein said bearing is configured to be machined with a conventional lathe machine.

3. The fixture assembly as claimed in claim 1, wherein a first helical groove is configured to be machined on said bearing surface with a groove cutting tool.

4. The fixture assembly as claimed in claim 1, wherein a second helical groove is configured to be machined by reversing the mounting position of the bearing by 180 degree on locating plate.

5. The fixture assembly as claimed in claim 1, wherein a counter weight (4) is configured to be mounted on base plate (1) of said fixture to balance the inertial forces.

6. The method for producing a helical oil groove in bearing comprising:
• mounting the fixture on the chuck;
• aligning the center line of component with spindle axis with turning fixture;
• aligning the orientation of fixture by a predetermined angle with respect to spindle axis;
• machining the bearing to produce a first helical groove by a grooving tool;
• reversing the component by 180 degrees; and
• machining the bearing to produce a second helical groove by a grooving tool.