WO2021240224A1 - A system and method for dual tool holder rest arrangement for turning in machining operation - Google Patents

Abstract

A system and method for a dual tool holder rest arrangement (104) in a turning machine comprising a single piece dual tool holder arrangement comprising a fork shaped dual tool holder rest arrangement (104) having a first tine and a second tine, a first tool holder section (103) forming an extension of the first tine, wherein distal end of the first tool holder being adapted to receive a first cutting point insert (102) forming a primary cut depth, and the first cutting point insert (102) being secured by a cutting insert holder screw (110) Additionally, a second tool holder section is detachably coupled to a coupling unit and in turn the coupling unit is coupled to the second tine. The distal end of the second tool holder adapted to receive a second cutting point insert (101) being secured by a cutting insert holder screw (110), and wherein the coupling unit comprises a convenient slot arrangement (108) for affixing the second tool holder section (109) by a tool post screw (111), the slot arrangement enables change in length of the second tool holder section forming a secondary cut depth.

Description

A SYSTEM AND METHOD FOR DUAL TOOL HOLDER REST ARRANGEMENT FOR TURNING IN MACHINING OPERATION

This International Application claims priority from a complete patent application filed in India having Patent Application No. 202021022555, on May 29, 2020 and titled “A SYSTEM AND METHOD FOR DUAL TOOL HOLDER REST ARRANGEMENT FOR TURNING IN MACHINING OPERATION”

FIELD OF THE INVENTION

The present invention relates to tool holder rest arrangement for turning in machining operation. More particularly to a system and method for dual tool holder rest arrangement for turning in machining operation.

DESCRIPTION OF THE PRIOR ART

Turning is widely and most popular machining operation used in many industries. The normal turning operation is carried out by using one single point cutting insert inserted on a single tool holder by fixing on the tool post of carriage with variable depth of cut, speed of job [RPM], and feed. When turning of large diameter and lengthy type of job carrying out, the user should take multiple numbers of cuts as per the requirement of the final diameter in respective length, which is a time taking process. If user wants to decrease the cycle time then user can add second carriage on lathe bed, which needs extra investment and power to finish the job. Furthermore, if a large depth of cut is used, the ordinary cutting point will be easily worn, and the turning of the special material will greatly increase the cost of the tool. Therefore, most of the turning operations can only be processed with a small amount of multiple cutting, which may lead to low turning efficiency. Therefore, in order to overcome the abovementioned problem, there exists a need for an improved apparatus. To overcome the above said lacunae in the prior art, a kind of turning double pole cutter (CN109550984) was proposed. The above said invention provided a kind of turning double pole cutter, including a knife rest, two cutters, adjusting components, and multiple compressing members. The patent application does not specifically disclose an apparatus comprising a primary and a secondary cutter pole coupled together in parallel comprising primary and secondary depth of cut, respectively.

Similarly, another invention on double pole boring bar (CN206425573U) illustrates a double -pole boring bar that can disposably complete more cutting output, compared with the borehole operation of the fast-big cutting output of completion. However, the patent application does not specifically disclose an apparatus comprising a primary and a secondary cutter pole coupled together in parallel comprising primary and secondary depth of cut, respectively.

Hence, it is an object of the present invention to provide an apparatus with a double pole cutting point for machining. The present invention discloses a cutting tool which provides the facility of turning big diameter and lengthy type job by providing two cutting point on a single tool holder. The double-pole tool also provides the facility of turning of the job by using two cutting points inserted on a single tool post, which helps to perform two depth of cuts in a single feed of the one carriage. The details with respect to the apparatus are further disclosed in the below mentioned one or more key elements. BRIEF DESCRIPTION OF THE INVENTION

The present invention provides an apparatus with a double -pole cutting point for machining. A cutting tool is disclosed, which provides the facility of turning big diameter and lengthy type job by providing two cutting points on a single tool holder. The double-pole tool provides the facility of turning of the job by using two cutting points inserted on a single tool post, which helps to perform two depth of cuts in a single feed of the one carriage. Accordingly, the two cutting tool are suitably fixed on the said tool holder. The placement of the two tool is such that second tool can be easily be removed and serviced. The secondary cutting tool can be removed based on the requirement of the sample to perform turning by one tool only, as primary cutting tool and slot for fixing secondary cutting tool is on one piece, so primary cutting tool can't be removed. Additionally, based on the requirements of the samples, the dual tool holder arrangement rest can accommodate the removal of the second cutting tools and give flexibility in the turning operation. The tool holder and along with the cutting inserts, helps in creating an arrangement that is flexible enough and dependent on the job material as well as cycle time of the depth of cut, feeding of the sample, and speed of output requirement of the finished job. In another embodiment of the present invention, the said arrangement of dual tool holder rest is used for boring operations also with suitable modifications on the said tool holder. BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure will be described and explained with additional specificity and detail with the accompanying figures in which:

Figure 1 illustrates a schematic representation of the proposed invention.

Figure 2a illustrates the top view of the present invention. Figure 2b illustrates a front view of the present invention.

Figure 3a illustrates side view of tool holder with a single cutting insert.

Figure 3b illustrates perspective of tool holder with cutting inserts.

Figure 3c illustrates side view tool holder with both cutting inserts.

Figure 4 illustrates the double pole cutting point according to the present invention. Figure 5a illustrates side view of said cutting insert.

Figure 5b illustrates front view of said cutting insert.

Further, those skilled in the art will appreciate that elements in the figures are illustrated for simplicity and may not have necessarily been drawn to scale. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the figures by conventional symbols, and the figures may show only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the figures with details that will be readily apparent to those skilled in the art having the benefit of the description herein.

DETAILED DESCRIPTION OF THE INVENTION

For the purpose of promoting an understanding of the principles of the disclosure, reference will now be made to the embodiment illustrated in the figures, and specific language will be used to describe them. It will nevertheless be understood that no limitation of the scope of the disclosure is thereby intended. Such alterations and further modifications in the illustrated system, and such further applications of the principles of the disclosure as would normally occur to those skilled in the art are to be construed as being within the scope of the present disclosure. The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such a process or method. Similarly, one or more devices or sub-systems or elements or structures or components preceded by "comprises... a" does not, without more constraints, preclude the existence of other devices, sub-systems, elements, structures, components, additional devices, additional sub-systems, additional elements, additional structures or additional components. Appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but not necessarily do, all refer to the same embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. The system, methods, and examples provided herein are only illustrative and not intended to be limiting.

In the following specification and the claims, reference will be made to a number of terms, which shall be defined to have the following meanings. The singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise.

The object of the invention is a method for continuous machining of a surface and a tool for continuous machining of a surface, cognate in particular to curved surfaces. Surface machining involves removing (shearing) diminutive fragments (i.e. chips) of a machined material. Surface machining can be categorized as chip machining, with a defined geometry and amplitude of the shearing cutting point, or a second group, abrasive machining, wherein these parameters are not defined. Chip machining of a surface is carried out, for example, by drilling, turning, , broaching, push broaching, planing or slotting. Due to the nature of the machining, these processes can be divided into continuous processes, such as planing, slotting, turning, drilling, and non- continuous processes.

Continuous machining is characterized in that in order to produce the desired surface, the cutting point, once plunged into the material, moves along a cutting trajectory to the very end, thereby obtaining the shape of the surface. In a state of the art machine tools, trajectories are straight, spiral or helical. This limits the surfaces that can be obtained by the continuous method to surfaces having a flat, cylindrical, and helical or any other profiled shape (any cross-section conventionally drawn along a straight line). Arbitrary shapes, such as curved surfaces, can be currently obtained by machining on milling machines (typically numerical controlled). This machining method additionally involves leading the tool along a set trajectory, but it utilizes a rotating tool, namely a milling cutter placed in a rotary spindle. The cutting points of the milling cutter continuously plunge into the material and emerge from it, thereby shaping the surface in a non-continuous manner. This non-continuity results in the roughness of the surface obtained by the machining process. It can only be ameliorated by minimizing the tool victual, which increases the machining time, and by incrementing the rotational haste of the tool, which has inhibitions in the form of the maximum rotational speed of machine spindle or in the form of permissible machining speed, beyond which the tool cutting point undergoes expeditious wear. Initially, the milling machines were machines that used rotating tools - i.e., tools predicated on non-continuous machining. Later on, structures and special tool holders were engendered, which made it possible to mount non-rotating tools, such as a turning tool or a chisel, to the milling machines, which made it possible to perform continuous machining operations on these machines, such as turning, slotting, planing, with the utilization of standard tools, such as chisels, turning tools, boring bars, etc. The surfaces machined in this way could only be simple surfaces, for example, a plane, a cylinder, because this machining method implicatively insinuates applying subsisting machining operations, such as turning or slotting, to the milling machine. The main circumscription to the introduction, to the milling machine, of continuous cutting of any surface, for example, curved surfaces, is the geometry of the cutting point and its orientation in cognation to the workpiece. Additionally, the number of cutting points, their relative positioning with each other also play a crucial role in their economic utility in the milling machine.

Accordingly, figure 1 illustrates a schematic representation of one of the embodiments of the present invention. There is a dual tool holder (104) that comprises a set of tines, namely first and second tine. There are two cutting inserts or points (101 and 102) mounted on a tool holder sections (109 and 103) arranged in parallel, the combination of dual tool holder arrangement (104) provides an avenue for turning large-sized samples (105) considerably at one go. The first tool holder section (103) forms an extension of the first tine and said first cutting insert (102) is mounted on said first tool holder (103). Similarly, the second tool holder section (109) form an extension of the second tine and said second cutting insert (101) is mounted on said second tool holder (109). The pair of tool holders sections (103, 109) are part of said dual tool holder arrangement (104). The said arrangement (104) helps in to perform two depth cuts in a single feed of one carriage. In other words, at one go, without changing the direction of the dual tool holder rest arrangement (104), two cut turning is provided that helps in improving the overall efficiency of the machine, including saving time and tooling costs. Accordingly, the two inserts (101 and 102) are suitably fixed on said tool holder sections (109, 103). The placement of the two inserts (101 and 102) are such that one of them (101) easily be removed and serviced. Additionally, based on the requirements of the samples (105), the dual tool holder arrangement rest (104) can accommodate the removal of one of the cutting tools (109) and give flexibility in the turning operation. The tool holder (103, 109) and along with the cutting inserts (102 and 101) helps in creating an arrangement (104) that is flexible enough and dependent on the job material as well as cycle time of the depth of cut, feeding of the sample (105), and speed of output requirement of the finished job. In another embodiment of the present invention, the said arrangement of dual tool holder rest (104) is used for boring operations also with suitable modifications on the said tool holder sections (103, 109).

Figure 2a and figure 2b illustrate said dual tool holder rest arrangement (104) along with the inserts (101 and 102) on the tool holder sections (109, 103). This double-pole tool holder rest arrangement (104) provides the facility of turning of job by using two cutting point (101 and 102) inserted on a pair of tool holders sections (109, 103) co- located on a single piece dual tool post rest (104), which helps to perform two depth of cuts in a single feed of the one carriage. Thus tool holder sections (103, 109) form part of said tool holder rest arrangement (104). As illustrated in figure 2a, the top view of the single-piece dual tool holder rest arrangement (104) is viewed showing the cutting inserts or points (101 and 102) suitably mounted on a tool holder sections (109, 103). The mounting of second cutting insert (101) along with its holder section (109) on said tool holder rest arrangement (104) is made through a coupling unit (107). The coupling unit (107) has convenient slot arrangements (108) with at least a pair of slots that helps in to secure said first holder section (109) over it. Additionally, another cutting insert holder screw (110) secures the cutting insert (102) over said tool holder (103). Similar arrangement exists for cutting insert (101).

Figure 2b illustrates the front view of said dual tool holder rest arrangement (104) according to one embodiment of the present invention. The figure illustrates tooling inserts (102) and tool holder (103) (not shown). Additionally, a tool post screw (111) is illustrated, which affixes the tool holder section (109) having cutting point insert (101) over the dual tool holder rest arrangement (104) through a coupling unit (107). The distal end of second tool holder is adapted to receive a second cutting point insert (101). The second cutting point insert (101) is secured by a cutting insert holder screw (110). The coupling unit comprises a convenient slot arrangement (108) for affixing the second tool holder section (109) by a tool post screw (111). The slot arrangement (108) enables the change in length of the second tool holder section (109) forming a secondary cut depth.

This arrangement of the dual tool holder rest (104) helps in giving flexibility and increases the operational efficiency of the turning operation of performing two depth of cuts in a single feed of the one carriage.

In an embodiment, the first cutting insert (101) and the second cutting insert (102) are so arranged that the primary cut depth from cutting insert (101) is less than the secondary cut depth from the second cutting insert (102) ( This kind of arrangement type tool calls right hand side tool)

In another embodiment, the first cutting insert and the second cutting insert are so arranged that the primary cut depth from cutting insert (101) is greater than the secondary cut depth from cutting insert (102) ( This kind of arrangement type tool calls left hand type tool).

Figure 3a, 3b and 3c illustrate the side view and perspective view of said tool (103). It shows the said tool holder section (103) with cutting insert (102) positioned over a coupling unit (107). The coupling unit (107) has a pair of convenient slot arrangement

(108) that helps it to secure with said tool holder rest arrangement (104). The tool holder section (103) is in one piece with (107) coupling unit.

Figure 4 illustrates another embodiment of the present invention. The said double pole tool holder rest arrangement (104) having two parallel tool holders (103,109) with secured cutting inserts (101 and 102) helps in performing two depth cuts in a single feed (105). The said arrangement (104) is so arranged that the primary cut depth from cutting insert (101) is more than secondary cut depth from cutting insert (102). This helps in the efficient turning of the feed or sample (105). In another embodiment of the present invention, the said arrangement (104) is used in a boring Operation, giving an increased efficiency of the cutting operation.

Figure 5a and 5b illustrates the side and front view of second cutting tool according to the present invention. The second cutting insert (101) is placed in said tool holder (109) (not shown in the figure).

The functioning of said method of continuous machining comprises setting said fork shaped dual tool holder rest arrangement (104) having said first tine and said second tine comprising said first tool holder section (103) and said second tool holder section

(109) configured to receive said first cutting point insert (102) forming a primary cut depth and said second cutting point insert (101) forming a secondary cut depth, respectively arranging said tool holder (103,109) over said dual tool holder rest arrangement (104) using a holder screw (110). During the machining operation, the primary cut depth from cutting insert ( 101) is less than secondary cut depth from cutting insert (102). The present of system for a dual tool holder rest arrangement imparts various technical advantages in comparison to the existing art such as double pole cutter helps to reduce the cycle time of turning and boring operation up to almost 50 percentage. The system may also result in saving the power and ultimately saving in money since cycle time reduces (almost by half) by using this tool. Improves efficiency of the overall machining operation as after completing turning or boring operation quickly in almost half of time, then machine will idle so it can be utilized for next job or operation.

It will be understood by those skilled in the art that the foregoing general description and the following detailed description are exemplary and explanatory of the disclosure and are not intended to be restrictive thereof.

While specific language has been used to describe the disclosure, any limitations arising on account of the same are not intended. As would be apparent to a person skilled in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein. The figures and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, the order of processes described herein may be changed and are not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all of the acts need to be necessarily performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples.

Claims

AIM:

1. A system for a dual tool holder rest arrangement (104) in a turning machine comprising: a single piece dual tool holder arrangement comprising a fork shaped dual tool holder rest arrangement (104) having a first tine and a second tine; a first tool holder section (103) forming an extension of the first tine, wherein distal end of the first tool holder being adapted to receive a first cutting point insert (102) forming a primary cut depth, and the first cutting point insert (102) being secured by a cutting insert holder screw (110), a second tool holder section (109) being detachably coupled to a coupling unit (107) and in turn the coupling unit is coupled to the second tine, wherein distal end of the second tool holder adapted to receive a second cutting point insert (101) and the second cutting point insert (101) being secured by a cutting insert holder screw (110), and wherein the coupling unit comprise a convenient slot arrangement (108) for affixing the second tool holder section (109) by a tool post screw (111), the slot arrangement (108) enables change in length of the second tool holder section (109) forming a secondary cut depth.

2. The system for a dual tool holder rest arrangement (104), wherein the first cutting insert (101) and the second cutting insert (102) are so arranged that the primary cut depth from cutting insert (101) is less than the secondary cut depth from the second cutting insert (102). 3. The system for a dual tool holder rest arrangement (104), wherein the first cutting insert and the second cutting insert are so arranged that the primary cut depth from cutting insert (101) is greater than the secondary cut depth from cutting insert (102).

4. The system for a dual tool holder rest arrangement (104) in a turning machine as claimed in claim 1, wherein said cutting inserts (101,102) arranged in said tool holder (104) operate in performing two depth cuts in a single feed. 5. The system for a dual tool holder rest arrangement (104) in a turning machine as claimed in claim 1, wherein said cutting inserts (101,102) are removably placed said tool holder section (103, 109).

6. The system for a dual tool holder rest arrangement (104) in a turning machine as claimed in claim 1, wherein said pair of tool holders sections (103, 109) are mounted on a single rest arrangement (104) in an integral manner.

7. A method of continuous machining with a dual tool holder rest arrangement (104) comprising: setting a fork shaped dual tool holder rest arrangement (104) having a first tine and a second tine comprising a first tool holder section (103) and a second tool holder section (109) configured to receive a first cutting point insert (102) forming a primary cut depth and a second cutting point insert (101) forming a secondary cut depth, respectively; arranging said tool holder (109) over said dual tool holder rest arrangement (104) using a tool post screw (111); and securing said cutting inserts (101,102) over said double pole tool holder with a cutting insert holder screw (110), wherein while machining operation, the primary cut depth from cutting insert (101) is less than secondary cut depth from cutting insert (102).

8. The method of continuous machining with a dual tool holder rest arrangement (104) as claimed in claim 7, wherein said cutting inserts (101,102) in said double pole tool holder (103) perform the machining operation continuously in parallel.

9. The method of continuous machining with a dual tool holder rest arrangement (104) as claimed in claim 7, wherein said at least two depth cuts are performed during the machining operation. 10. The method of continuous machining with a dual tool holder rest arrangement

(104) as claimed in claim 7, wherein said cutting inserts (101,102) are serviceable and removable from said holders (109, 103), respectively.