Claims:We claim:
1. A modified tool holder apparatus in the edge preparation machining, the apparatus comprising:
an ‘a’ angle in 11° to the horizontal axis mode;
a first vertical surface (09) made parallel to a second vertical surface (08); and
an insert (05) having at least four cutting edges, the inert (05) is fixed in a modified tool holder (07), the modified tool holder (07) is fitted with a shim (03) and tightened with a bottom shim (04), and the inert (05) is fixed on the modified tool holder (07) with a top screw (06).
2. The modified tool holder apparatus as claimed in claim 1, wherein the modified tool holder (07) provided with two parallel surfaces ensures the fixing the insert (05) in any position so that all the four cutting edges is used in succession.
3. The modified tool holder apparatus as claimed in claim 1, wherein the modified tool holder (07) is used in the edge preparation machine for effective utilization of all the cutting edges in the insert (05).
4. The modified tool holder apparatus as claimed in claim 1, wherein the modified tool holder (07) reduces the annual consumption of insert (05) by 50 percent.
, Description:A MODIFIED TOOL HOLDER APPARATUS IN THE EDGE PREPARATION MACHINING
TECHNICAL FIELD
[0001] The present invention generally relates to a modified tool holder apparatus in the edge preparation machining. More particularly the invention relates to an edge preparation in steam flowing pipes for high pressure high temperature power boilers.
BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention.
[0003] High thickness pipes ranging from 15mm to 30 mm thickness with outside diameter ranging from 47 mm to 273 mm are used in the main steam lines of super heaters, integral piping of boiler feed pumps and feed discharge line of high pressure reheater in high pressure boilers for power generation. The pipes are to be connected by welding for which different edge preparation styles are used depending on the grade of material and size of the pipes. The plunge type machining carried out on the pipes using tools with carbide tips to make edge preparation for butt welding of the pipes.
[0004] Figure 1 shows the typical edge preparation carried out in a pipe on one end for welding with another pipe. The inserts used are of rhombus shaped [refer figure 2] has four edges for machining. But the existing tool holder [refer figure 3] is designed for using only two cutting edges for making edge preparation in such way that the angle ‘a’ is 11 and the angle is ‘b’ is 22 . Because of this tool holder, the used insert is scrapped after two edges used for edge preparation machining because there is no way to fix the insert to ultilise the other two edges.
[0005] Hence the following are the draw backs found in this existing process.
1. Underutilisation of inserts [only two edges are used]
2. More cost incurred in machining process.
3. More inserts consumption.
[0006] [Figure 4] shows the existing tool holder with inserts in position. So, there is a need to find out a new tool holder to overcome the above draw backs.
[0007] KR 101166357 B1 describes cutting tool inserts and methods of manufacture and in this method it is designed for using only one edge inserts is described.
[0008] EP 2167260 B1 describes a cutting tool holder with in feeding arrangement for machining purpose.
[0009] JP 4954069 B2 deals with cutting tool and method for position cutting insert. The shape of the tool holder used in this invention is not relevant to the present invention.
[0010] US 7905689 B2 is an improved design of cutting tool system, cutting insert and tool holder used in the milling machine and not related to the present invention.
[0011] Further, the high thickness pipes are butt welded in the manufacturing of high pressure steam pipes for which edge preparation plays a vital role and the inserts with four cutting edges are used for making edge preparation in which the existing tool holder design is suitable for using only two opposite edges of inserts for edge preparation.
[0012] Therefore, there is a need for a modified tool holder apparatus in the edge preparation machining. The modified tool holder with two parallel surfaces ensures the fixing the inserts in any position so that the all the four edges can be used in succession there by the machining cost will be reduced substantially.

OBJECTS OF THE DISCLOSURE
[0013] Some of the objects of the present disclosure, which at least one embodiment herein satisfy, are listed herein below.
[0014] The principal object of the present subject matter is to provide an improved machine tool holder to utilize all the four edges of the inserts for edge preparation, which eliminates the drawbacks said in the back ground.
[0015] Another object of the present invention is to provide development of tool holder in the edge preparation machining for effective utilisation of all the edges in the inserts.
[0016] These and other objects and advantages will become more apparent when reference is made to the following description and accompanying drawings.
SUMMARY
[0017] This summary is provided to introduce concepts related to a modified tool holder apparatus in the edge preparation machining. The apparatus comprising an “a” angle in 11° to the horizontal axis mode.
[0018] A first vertical surface made parallel to a second vertical surface.
[0019] An insert is having at least four cutting edges. The inert is fixed in a modified tool holder. The modified tool holder is fitted with a shim and tightened with a bottom shim. The inert is fixed on the modified tool holder with a top screw.
[0020] The modified tool holder is provided with two parallel surfaces ensures the fixing the inserts in any position so that all the four edges is used in succession.
[0021] The modified tool holder is used in the edge preparation machine for effective utilization of all the cutting edges in the inserts.
[0022] The modified tool holder reduces the annual consumption of inserts by 50 percent.
[0023] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The illustrated embodiments of the subject matter will be understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and methods that are consistent with the subject matter as claimed herein, wherein:
[0025] Fig. 1 shows the typical edge preparation made in the pipes used to connect the another pipe by butt welding process;
[0026] Fig. 2 shows the conventional inserts used for edge preparation having four edges for machining;
[0027] Fig. 3 shows the existing cutting tool holder used in this method;
[0028] Fig. 4 shows the assembly of inserts positioned in the existing tool holder; and
[0029] Fig. 5 and Fig.6 show the modified improvement tool holder designed for using four edges in the edge preparation;
[0030] The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description 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
[0031] The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to clearly communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[0032] It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
[0033] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a",” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,” “comprising,” “includes” and/or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
[0034] It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
[0035] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
[0036] Fig. 5 and Fig. 6 show a modified improvement tool holder designed for using four edges in the edge preparation according to some example embodiment of the invention. In an embodiment, the modified cutting tool holder exhibits insert (05) in changed position so that angle ‘a’ is retained as 11 degrees with reference to the horizontal axis and keeping ‘b’ as 0 degree. The insert (05) is fixed to modified tool holder (07) to utilise insert edges that cannot be accommodated with earlier tool holder (02). Thus the vertical surface (08) is formed. The vertical surface (09) is formed to so that the vertical surface (08) and (09) are parallel. The assembling procedure is followed now. The modified tool holder (07) is fitted with shim (03) and tightened with bottom screw (04). The conventional insert (05) is fixed on the modified tool holder (07) with top screw (06). By the above method, all the four edges now can be used in succession for edge preparation the work piece (01).
[0037] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances, where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
[0038] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.