WO2019175795A1

WO2019175795A1 - A boring and facing tool

Info

Publication number: WO2019175795A1
Application number: PCT/IB2019/052033
Authority: WO
Inventors: Dilip Dattatray NADKARNI
Original assignee: Nadkarni Dilip Dattatray
Priority date: 2018-03-15
Filing date: 2019-03-13
Publication date: 2019-09-19

Abstract

The present disclosure relates to the field of cutting tools. A boring and facing tool (100) disclosed is power efficient and can be easily attached and detached to any machine. The tool (100) comprises a guiding member (110), a first driving means to linearly displace the guiding member (110), a hollow spindle (130), a second driving means to angularly displace the spindle (130), a pusher (115), a tool slider (120), and a tool holder (210). The spindle (130) receives the guiding member (110). The pusher (115) is mounted on the guiding member (110). The tool slider (120) is slidably mounted on the pusher (115), and is displaced across the pusher (115) when the guiding member (110) is linearly displaced. The tool holder (210) is coupled to the tool slider (120), and is configured to be displaced along with the tool slider (120).

Description

A BORING AND FACING TOOL

FIELD

The present disclosure relates to the field of cutting tools.

DEFINITIONS

As used in the present disclosure, the following terms are generally intended to have the meaning as set forth below, except to the extent that the context in which they are used indicate otherwise.

Facing operation - The term“facing operation” refers to an operation of removing material from an end portion or shoulder of a workpiece.

Boring operation - The term“boring operation” refers to an operation of forming or enlarging a hole in a workpiece.

Horizontal machining center - The term“horizontal machining center” refers to a machine having a spindle and at least two slides to displace the spindle in two axes.

Computer numerical control - The term“computer numerical control” refers to control and operation of machine tools via a pre-programmed machine control commands. These definitions are additional to those expressed in the art.

BACKGROUND

The background information herein below relates to the present disclosure but is not necessarily prior art.

Conventionally, for performing various complicated operations, such as boring and facing, special purpose machines (SPMs) are required in a manufacturing plant. However, such machines have limited operational capability. Further, such machines are extremely expensive for maintenance, and consumes huge amount of power for functioning. One of the approaches to counter aforementioned drawbacks of the special purpose machines is to develop an attachment for holding a tool. Such attachments can be attached and detached from a machine at will. The attachments are provided with a tool holder that holds a tool required for performing specific operation such as boring or facing operation. However, conventional attachments consumes huge amount of power. Further, conventional tool attachments include a plurality of gears, which reduces accuracy of the attachments. Additionally, the conventional tool attachments are difficult to service. Further, the conventional attachments cannot be used to perform complex machining operations such as profile machining, and tapered boring. Further, synchronization of two axes in conventional attachments is not accurate, which results in improper machining operation.

Therefore, there is felt a need of a boring and facing tool that alleviates the aforementioned drawbacks of the conventional special purpose machines and attachments. OBJECTS

Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:

An object of the present disclosure is to provide a boring and facing tool that performs both boring and facing operations on a workpiece. Another object of the present disclosure is to provide a boring and facing tool that is power efficient.

Another object of the present disclosure is to provide a boring and facing tool that is easy to attach to any machine.

Yet another object of the present disclosure is to provide a boring and facing tool that is easy to maintain.

Still another object of the present disclosure is to provide a boring and facing tool that withstands heavy machining operations.

Still another object of the present disclosure is to provide a boring and facing tool that employs a single point cutting tool operation. Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure. SUMMARY

The present disclosure envisages a boring and facing tool. The tool comprises a guiding member, a first driving means, a hollow spindle, a second driving means, a pusher, a tool slider and a tool holder. The guiding member has external threads configured at a first end thereof. The first driving means is configured to linearly displace the guiding member. The hollow spindle is configured to receive a second end of the guiding member. The second driving means is configured to angularly displace the spindle. The pusher is disposed in the spindle, and is mounted on the guiding member. The tool slider is slidably mounted on the pusher, and is configured to be displaced across the pusher when the guiding member is linearly displaced. The tool holder is coupled to the tool slider, and is configured to be displaced along with the tool slider.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING

A boring and facing tool, of the present disclosure, will now be described with the help of the accompanying drawing, in which: Figure 1 illustrates an exploded view of the boring and facing tool, in accordance with an embodiment of the present disclosure;

Figure 2 illustrates a sectional isometric view of the boring and facing tool of figure 1 ;

Figure 3 illustrates an isometric view of the boring and facing tool of figure 1 ; and Figure 4 illustrates a side view of the boring and facing tool of figure 1. LIST OF REFERENCE NUMERALS 100 - Boring and facing tool 105 - First motor 110 - Guiding member 115 - Pusher 120 - Tool slider

121 - Lock nut 122 - Taper roller bearings

130 - Spindle

140 - First pair of pulleys 145 - First timing belt 150 - Flelical threads

155 - Ball nut

165 - Retainer body 175 - First slot

185 - Second motor 190 - Second pair of pulleys

195 - Second timing belt 200 - Extension

205 - Second slot

210 - Tool holder

215 - Linear guide rail

220 - Recess

225 - Second cover 230 - Boring bar

235 - First retainer plate 240 - Second retainer plate

245 - Third retainer plate 250 - Key

DETAILED DESCRIPTION

Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.

Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details, are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.

The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms "a”, "an", and "the" may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms "comprises", "comprising",“including”, and“having” are open ended transitional phrases and therefore specify the presence of stated features, integers, steps, operations, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The particular order of steps disclosed in the method and process of the present disclosure is not to be construed as necessarily requiring their performance as described or illustrated. It is also to be understood that additional or alternative steps may be employed.

When an element is referred to as being "mounted on",“engaged to”, "connected to", or "coupled to" another element, it may be directly on, engaged, connected or coupled to the other element. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed elements.

The terms first, second, third, etc., should not be construed to limit the scope of the present disclosure as the aforementioned terms may be only used to distinguish one element, component, region, layer or section from another component, region, layer or section. Terms such as first, second, third etc., when used herein do not imply a specific sequence or order unless clearly suggested by the present disclosure. Terms such as“inner”,“outer”, "beneath", "below", "lower", "above", "upper", and the like, may be used in the present disclosure to describe relationships between different elements as depicted from the figures.

The present disclosure envisages a boring and facing tool that is easily attachable and detachable with any machine. The boring and facing tool of the present disclosure is now described with reference to Figure 1 through Figure 4.

Referring to Figure 1 to Figure 4, a boring and facing tool 100 is shown. The boring and facing tool 100 comprises a guiding member 110, a first driving means, a hollow spindle 130, a second driving means, a pusher 115, a tool slider 120, and a tool holder 210.

The guiding member 110 is a rigid member having a plurality of external helical threads 150 thereon. More specifically, the helical threads 150 are configured at a first end of the guiding member 110. The helical threads 150 have configuration like a ball screw. The first driving means is coupled to the guiding member 110, and is configured to linearly displace the guiding member 110. In an embodiment, the first driving means includes a ball nut 155, a first pulley drive, and a first motor 105 configured to drive the first pulley drive. The ball nut 155 is configured to receive the guiding member 110. More specifically, the ball nut 155 receives the first end of the guiding member 110 which has the helical threads 150 configured thereon. The ball nut 155 has a plurality of internal helical threads. The internal threads are configured to engage with the external threads 150 of the guiding member 110. When angularly displaced, the ball nut 155 is configured to linearly displace the guiding member 110. The internal threads are configured circumferentially in a central hole of the ball nut 155. The first pulley drive is configured to angularly displace the ball nut 155. The first pulley drive includes a first pair of pulleys 140. The first pair of pulleys 140 is coupled to each other via a first timing belt 145. Further, one of the pulleys of the first pair of pulleys 140 has a bore configured to receive the ball nut 155.

The first motor 105 is coupled to the first pair of pulleys 140, and configured to drive the same. In one embodiment, the first motor 105 is a servo motor.

The shape of the external threads 150 is complementary to the shape of the internal threads of the ball nut 155. The guiding member 110 passes through the ball nut 155. Due to the arrangement of the internal helical threads on the ball nut 155 and the external helical threads 150 on the guiding member 110, the rotational motion of the pulley facilitates the linear motion of the guiding member 110. Thus, the guiding member 110 can be linearly displaced in forward and reverse direction by changing direction of rotational displacement of the first pair of pulleys 140. Due to helical threads, the guiding member 110 gets rotated about the longitudinal axis thereof. The tool 100 further comprises a retainer body 165. The retainer body 165 has a hollow configuration to facilitate the guiding member 110 to pass therethrough. The retainer body 165 is configured to support the first driving means, more specifically, the first pair of pulleys 140, the first timing belt 145, and the first motor 105.

Further, the retainer body 165 has a first slot 175 configured thereon to receive the first timing belt 145 and one pulley of the first pair of pulleys 140. The other pulley of the first pair of pulleys 140, and the first motor 105 are supported on the retainer body 165. The pulley disposed within the retainer body 165 receives the ball nut 155.

The tool 100 further comprises a first retainer plate 235 and a second retainer plate 240 disposed in the retainer body 165. The first retainer plate 235 and the second retainer plate 240 are configured to secure the ball nut 155 and the pulley (which is within the retainer body

165 and receives the ball nut 155) of the first pair of pulleys 140 in the retainer body 165.

Further, taper roller bearings are disposed between the ball nut 155 and the first retainer plate 235, and between the ball nut 155 and the second retainer plate 240. The first retainer plate 235 and the second retainer plate 240 are secured to an inner surface of the retainer body 165. The arrangement of the taper roller bearings reduces backlash that may arise during linear displacement of the guiding member 110.

The tool 100 further comprises a third retainer plate 245 configured to retain an assembly of the first retainer plate 235, the ball nut 155, and second retainer plate 240 within the retainer body 165. The third retainer plate 245 is further configured to attach the tool 100 to any machine. The third retainer plate 245 is attached to the machine via fasteners. The third retainer plate 245 has a plurality of holes (not specifically labelled in figures) to receive the fasteners. In an embodiment, the third retainer plate 245 is securely connected to an operative rear surface of the retainer body 165 via fasteners. In another embodiment, the third retainer plate 245 is disposed in the retainer body 165 proximal to an operative rear surface thereof. The spindle 130 is configured to receive a second end of the guiding member 110. In an embodiment, the spindle 130 has an extension 200 configured to be received in the retainer body 165. More specifically, the spindle 130 is partially received in the retainer body 165 from an operative front end of the retainer body 165.

The spindle 130 has a bore configured to facilitate passing of the guiding member 110 therethrough. The spindle 130 is rotatable about the longitudinal axis thereof. To facilitate rotational displacement of the spindle 130 in the retainer body 165, taper roller bearings are disposed between the spindle 130 and the retainer body 165.

The second driving means is configured to angularly displace the spindle 130. The second driving means comprises a second pulley drive and a second motor 185. The second pulley drive is configured to angularly displace the spindle 130. The second motor 185 is mounted on the retainer body 165, and coupled to the second pulley drive to drive the second pulley drive. In an embodiment, the second motor is a servo motor.

The second pulley drive comprises a second pair of pulleys 190 and a second timing belt 195. The second motor 185 and one of the second pair of pulleys 190 are mounted on the retainer body 165. The second pair of pulleys 190 is connected to each other via the second timing belt 195.

The other pulley of the second pair of pulleys 190 is mounted on a portion of the extension 200 of the spindle 130, which is outside the retainer body 165. The second motor 185 is configured to rotate the spindle 130 via the second pair of pulleys 190. The spindle 130 can be rotated in clockwise or anti-clockwise direction by changing the rotational direction of an output shaft of the second motor 185.

It should be noted that the operation of the first motor 105 and the second motor 185 is independent of each other. More specifically, the first motor 105 and the second motor 185 can be operated simultaneously or individually as per application requirement.

Gearboxes are provided between the first motor 105 an the respective pulley coupled to the first motor 105, and between the second motor 185 and the respective pulley coupled to the second motor 185. More specifically, the gearboxes are mounted outside the spindle 130 and the retainer body 165. Thus, there is no constraint on the size, and thus, the capacity of the gearboxes. More specifically, powerful gearboxes having more torque capacity can be used in the tool 100. The size, capacity, and strength of the gearboxes are determined as per the application requirement. Further, as gearboxes are outside the spindle 130 and the retainer bodyl65, the gearboxes can be easily dismounted or replaced in case of failure. Furthermore, the gearboxes can be easily replaced with higher capacity gearboxes if application demands the same.

The guiding member 110 extends from the operative front end of the retainer body 165 and received in the spindle 130. Further, the pusher 115 is disposed in the spindle 130, and is mounted on an operative second end of the guiding member 110. In an embodiment, the pusher 115 is mounted on the guiding member 110 via a lock nut 121 and taper roller bearings 122. The taper roller bearings 122 facilitate angular displacement of the pusher 115 and the spindle 130 with respect to the guiding member 110, i.e., the pusher 115 and the spindle 130 can be rotated without rotating the guiding member 110. Further, the taper roller bearings 122 facilitate linear displacement of the guiding member 110 without displacing the pusher 115.

Further, the tool slider 120 is slidably mounted on the pusher 115. The tool slider 120 is configured to be displaced across the pusher 115 when the guiding member 110 is linearly displaced. More specifically, the tool slider 120 is orthogonally mounted on the pusher 115 with respect to the longitudinal axis of the pusher 115. When the guiding member 110 is linearly displaced by the ball nut 155, the guiding member 110 displaces the pusher 115. The tool slider 120 is mounted on the pusher 115 such that the displacement of the pusher 115 results in the displacement of the tool slider 120 in a direction transverse to the direction of displacement of the pusher 115.

The spindle 130 comprises a second slot 205 configured to receive the tool slider 120. The second slot 205 is further configured to facilitate the transverse linear movement of the tool slider 120 with respect to the pusher 115.

The pusher 115 has a flat operative top portion, and the tool slider 120 has a flat operative bottom portion. Complementary key slots are configured on the mating portions of the pusher 115 and the tool slider 120 to receive a key therein. The key slots make a predetermined angle with an edge of each of the pusher 115 and the tool slider 120. The predetermined angle is determined such that the linear displacement of the pusher 115 results in orthogonal linear displacement of the tool slider 120 with respect to the pusher 115. In an embodiment, the predetermined angle of the key slots ranges from 30° to 50°.

A key 250 is disposed in the key slots on the tool slider 120 and the pusher 115.

The guiding member 110, and thus the pusher 115 are linearly displaced by the first motor 105 and the first pair of pulleys 140. Due to the arrangement of the key slots and the key 250, the linear motion of the pusher 115 in one direction is converted the linear displacement of the tool slider 120 in the orthogonal direction. It is to be noted that the directions of linear displacements of the pusher 115 and the tool slider 120 are orthogonal to each other.

It should be noted that the rotational displacement of the first pair of pulleys 140 is converted into the reciprocating linear displacement of the guiding member 110. Further, the linear displacement of the guiding member 110 is converted into the linear displacement of the tool slider 120 in an orthogonal direction to that of the guiding member 110 and the pusher 115.

The tool holder 210 is connected to the tool slider 120, and configured to be displaced along with the tool slider 120. The tool holder 210 has two edges and a tool holding body. The edges extend perpendicularly from the tool holding body. One edge of the tool holder 210 is connected to the tool slider 120, whereas other edge is slidably connected to a linear guide rail 215.

The spindle 130 comprises a first recess 220 configured to receive a linear guide rail therein.

The linear guide rail 215 and the tool slider 120 are arranged parallel to each other in the first recess 220 and in the second slot 205 respectively to facilitate uniform linear displacement of the tool holder 210.

The tool holding body of the tool holder 210 is configured to securely hold a boring bar 230. The boring bar 230 performs the boring or facing operation on a workpiece.

The tool 100 further comprises a stopper plate configured to limit the linear displacement of the pusher 115 in the spindle 130.

The tool 100 further includes a computer numerical control drive configured to control and operate the first driving means, more specifically, the first motor 105, and the second driving means, more specifically, the second motor 185. The computer numerical control drive also controls the linear movement of the pusher 115 in the spindle 130.

The computer numerical control drive operates the first motor 105 and the second motor 185 independently or in synchronization. Thus, the boring bar 230 or the tool holder 210 can be independently translated by operating the first motor 105 alone, rotated by operating the second motor 185 alone, or simultaneously rotated and translated by synchronously operating the first motor 105 and the second motor 185 as per the requirement of the operation to be performed on the workpiece. Further, the synchronous operation of the first motor 105 and the second motor 185 facilitates cutting operation by a single point cutting tool, which is not possible in conventional horizontal machining centers. The conventional horizontal machining centers require multi-point cutting tool to perform facing/boring operations. The use of multi-point cutting tool hampers accuracy of the operation and surface finish of a workpiece. On the other hand, the tool 100 can perform angular/profile machining operation using a single point cutting tool. The use of single point cutting tool improves accuracy of the operation and also improves surface finish of a workpiece.

The tool 100 includes a first cover and a second cover 225. The first cover is mounted on the spindle 130 and covers the same. The second cover 225 is configured to cover the retainer body 165, the first motor 105, the second motor 185, the first pair of pulleys 140, and the second pair of pulleys 190. The first cover and the second cover 225 prevent ingress of dust, dirt, or burr released from a workpiece.

The working of the boring and facing tool 100 is now described in subsequent paragraphs.

The boring and facing tool 100 is connected to a spindle (not specifically shown in figures) or a headstock of a horizontal machining center (not shown in figures) via fasteners. The first motor 105 and the second motor 185 are electrically connected to the horizontal machining center. The operation of the first motor 105 and the second motor 185 is controlled by the computer numerical control drives. Using the computer numerical drives, the first motor 105 and the second motor 185 are operated to perform the boring, facing, or profile machining operation as per the requirement.

The boring and facing tool 100 consumes less power for its operation. The drive and motors of the horizontal machining center are used only to position the tool 100 with respect to the workpiece. Once the tool 100 is positioned with respect to the workpiece, the spindle or headstock (on which the tool 100 is mounted) of the horizontal machining center remains idle and only the motors 105, 185 of the tool 100 are operated. This saves a lot of power as the motor of the horizontal machining center consumes more power than the motors 105, 185 of the tool 100. Thus, use of the tool 100 conserves energy. To perform boring and facing operations on large sized work-pieces, horizontal machining centers with high power ratings are used. Power rating of the motor of such horizontal machining centers is above 30 Hp. The power rating of the motors 105, 185 of the tool 100 is about 5 Hp. Thus, a large amount of power is saved during its operation.

As there are no gears used in the tool 100 for displacing the tool holder 210, the tool 100 performs the boring and facing operation with highest accuracy as backlash errors are minimized. The tool 100 involves use of helical threads which can generate minimum backlash errors. Further, the tool 100 is easy to maintain due to absence of gears.

The tool 100 is configured to withstand heavy machining operation.

The tool 100 can perform complex machining operations such as tapered profile facing (including angular facing, incremental facing, and profile machining), boring holes of any shape, incremental boring operation, and boring operation to form holes having stepped profiles.

The foregoing description of the embodiments has been provided for purposes of illustration and not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment, but, are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.

TECHNICAL ADVANCEMENTS The present disclosure described herein above has several technical advantages including, but not limited to, the realization of a boring and facing tool that:

• performs both boring and facing operations on a workpiece; is power efficient; • is easy to attach to any machine;

• is easy to maintain;

• employs a single point cutting tool operation; and

• withstands heavy machining operations.

The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.

The foregoing description of the specific embodiments so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

The use of the expression“at least” or“at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.

Any discussion of documents, acts, materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application. The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary. While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.

Claims

CLAIMS:

1. A boring and facing tool (100), said tool (100) comprising:

a guiding member (110) having external helical threads (150) configured at a first end thereof; a first driving means configured to linearly displace said guiding member

(HO); a hollow spindle (130) configured to receive a second end of said guiding member (110); a second driving means configured to angularly displace said spindle (130); a pusher (115) disposed in said spindle (130), and mounted on said guiding member (110); a tool slider (120) slidably mounted on said pusher (115), and configured to be displaced across said pusher (115) when said guiding member (110) is linearly displaced; and a tool holder (210) coupled to said tool slider (120), and configured to be displaced along with said tool slider (120).

2. The tool (100) as claimed in claim 1, wherein said first driving means comprises: a ball nut (155) configured to receive said first end of said guiding member (110), said ball nut (155) having internal threads configured to engage with said external helical threads (150) of said guiding member (110), said ball nut (155) configured to linearly displace said guiding member (110) when angularly displaced; a first pulley drive configured to angularly displace said ball nut (155); and a first motor (105) configured to drive said first pulley drive.

3. The tool (100) as claimed in claim 2, wherein one of the pulleys of said pulley drive has a bore to receive said ball nut (155).

4. The tool (100) as claimed in claim 2, which comprises a retainer body (165) having a hollow configuration to facilitate said guiding member (110) to pass therethrough.

5. The tool (100) as claimed in claim 4, wherein said retainer body (165) comprises a first slot (175) configured thereon. 6. The tool (100) as claimed in claim 4, wherein said spindle (130) has an extension

(200) configured to be received in said retainer body (165).

7. The tool (100) as claimed in claim 6, wherein said second driving means comprises: a second pulley drive configured to angularly displace said spindle (130), wherein one of the pulleys of said second pulley drive is mounted on a portion of said extension (200) outside said retainer body (165); and a second motor (185) mounted on said retainer body (165), and coupled to said second pulley drive.

8. The tool (100) as claimed in claim 4, wherein said tool (100) comprises a first retainer plate (235) and a second retainer plate (240) securely disposed in said retainer body (165), and configured to secure said ball nut (155) and a pulley receiving said ball nut

(155) in said retainer body (165).

9. The tool (100) as claimed in claim 8, wherein a taper roller bearing is disposed between said first retainer plate (235) and said ball nut (155), and between said second retainer plate (240) and said ball nut (155). 10. The tool (100) as claimed in claim 8, which includes a third retainer plate (245) configured to retain an assembly of said first retainer plate (235), said ball nut (155), and said second retainer plate (240) within said retainer body (165).

11. The tool (100) as claimed in claim 1, wherein said tool (100) comprises a stopper plate configured to limit the linear displacement of said pusher (115) in said spindle (130).

12. The tool (100) as claimed in claim 1, wherein said spindle (130) comprises: a first recess (220) configured to receive a linear guide rail (215) therein; and a second slot (205) configured to receive said tool slider (120), and further configured to facilitate transverse linear movement of said tool slider (120) with respect to said pusher (115).

13. The tool (100) as claimed in claim 12, wherein one edge of said tool holder (210) is connected to said tool slider (120), and other edge of said tool holder (210) is slidably connected to said linear guide rail (215).

14. The tool (100) as claimed in claim 12, wherein said linear guide rail (215) and said tool slider (120) are parallely arranged in said spindle (130).

15. The tool (100) as claimed in claim 1, wherein said pusher (115) is mounted on said guiding member (110) via a lock nut (121) and taper roller bearings (122) configured to facilitate angular displacement of said pusher (115) and said spindle (130) with respect to the guiding member (110).

16. The tool (100) as claimed in claim 1, wherein complementary key slots are configured on said pusher (115) and on said tool slider (120) at a predetermined angle with respect to an edge of each of said pusher (115) and said tool slider (120), and said key slots are configured to receive a key (250) therein.

17. The tool (100) as claimed in claim 1, wherein said tool slider (120) is orthogonally mounted on said pusher (115) with respect to the longitudinal axis of said guiding member (110). 18. The tool (100) as claimed in claim 1, wherein said tool holder (210) is configured to hold a boring bar (230).

19. The tool (100) as claimed in claim 1, which comprises a computer numerical control drive configured to control and operate said first driving means and the second driving means.