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:
SPECIAL MILLING CUTTER FOR TUNGSTEN CARBIDE TURNING INSERT

Applicant:
BEML Limited
A company Incorporated in India under the Companies Act, 1956
Having address:
BEML Soudha, 23/1, 4th Main,
Sampangirama Nagar, Bengaluru,
Karnataka - 560 027, 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 an Indian Provisional Application 201941054544 filed on 30th December 2019.
TECHNICAL FIELD
[002] The present invention relates to milling cutter and more particularly relates to a special milling cutter for Tungsten Carbide turning insert.

BACKGROUND

[003] Tungsten Carbide ISO Turning Insert CNMG 190612 is widely used for general external turning and boring applications in metal cutting industries using tools like PCLNR/L. The insert CNMG is rhombic in shape and has 8 cutting edges including both sides. Insert’s 80 Degree corner is being used for general turning and facing application while Insert’s 100 Degree corner can be used only for Straight turning applications using tool holder PCBNR/L. There is an acute shortage of Tungsten Carbide (WC) all over the world, accordingly prices of Tungsten Carbide Inserts and related Tools are spiraling every year. In this context, it is inevitable to explore the ways to use all the corners of CNMG Inserts including 100 Deg. Corner before forwarding Insert for recycling.

OBJECT OF THE INVENTION

[004] The main object of the present invention is to utilize the 4 unused 100 degree corners of the CNMG 190612 insert.

[005] Another object of the present disclosure is to develop milling cutter to suit CNMG Insert.

[006] Yet another object of the present disclosure is complete utilization of CNMG Insert to reduce Tungsten Carbide consumption.

SUMMARY

[007] 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 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 milling cutter, 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.
[008] In one embodiment, a special milling cutter is developed. The milling cutters are designed for 100 degree corners of CNMG 190612 Turning Inserts for rough milling applications. The milling cutter has cutter size of Ø160 and Ø200mm. The disclosed milling cutter may be used for Duplex milling machines, Facing and Centering machines, Vertical milling FN3V machines, Cooper planning machine and BOMA Link milling machines.
BRIEF DESCRIPTION OF THE DRAWINGS
[009] 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:
[0010] 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.
[0011] Figure 1 illustrates schematic for a milling cutter in accordance to an embodiment of the present invention.
[0012] Figure 2 illustrates a CNMG 190612 insert to be attached to the milling cutter.
[0013] Figure 3 illustrates one embodiment of milling cutter in accordance to the present invention.
[0014] 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
[0015] 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.
[0016] 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.

[0017] Referring to Figure 1 shows special milling cutter. The disclosed cutter is developed for 4 unused corners of CNMG 190612 turning inserts (1) for rough milling applications. After utilizing the 80 degree corner of CNMG insert in turning / boring applications, 100 degree corner of CNMG insert was used for straight turning application using tool holder PCBNL/R. The milling cutter is developed to suit insert CNMG 190612 (1) for make use of insert's 100 degree corner for rough milling application. The milling cutter consists of plurality of various insert pockets. The milling cutter consists of top Clamps (3) for clamping the CNMG 190612 turning insert (1) on each insert pocket and clamp screws (5) to fix the CNMG 190612 turning insert (1) in each insert pocket. Hence the maximum utilization of CNMG insert and Tungsten Carbide is ensured. This milling cutter is tried on duplex milling, facing and centering, vertical milling FN3V, cooper planning machine and BOMA link milling machines.

[0018] Further, one embodiment of the invention may be used for designing of special Milling cutter.

[0019] 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.

[0020] Some object of the present invention enables use of 4 unused 100 degree corners of insert for rough milling application.

[0021] REFERRAL NUMERALS:
Element Description Reference Numeral
CNMG 190612 turning inserts 1
Top clamps 3
Clamp screws 5

,CLAIMS:
1. A milling cutter comprising of:
plurality of pockets for mounting the cutting inserts;
plurality of CNMG inserts (1) for milling application;
plurality of top clamps (3) for clamping the CNMG(1) inserts on each pocket of the milling cutter; and
plurality of clamp screws (5) for rigidly mounting the CNMG(1) insert in the pockets.

2. The milling cutter as claimed in claim 1, wherein said CNMG (1) inserts are CNMG190612 turning inserts (1) with 4 unused 100 degree corners.

3. The milling cutter as claimed in claim 1, wherein said 4 un-used corners of the CNMG 190612 (1) turning inserts are configured for rough milling applications.

4. The milling cutter as claimed in claim 1, wherein said 100 degree corner of the CNMG 190612 turning inserts are configured for rough milling applications.

5. The milling cutter as claimed in claim 1, wherein said milling cutter is configured to be mounted on duplex milling, facing and centering, vertical milling FN3V, cooper planning machine and BOMA link milling machines or similar Milling machines.