Claims:WE CLAIM:

1. A tool for boring and chamfering of tubes in Edge preparation machine comprising of boring tip fixed with star screw (1) provided at the top of body (2) and the body (2) is placed above shank (3) constituting a single piece.

2. The tool for boring and chamfering of tubes in Edge preparation machine as claimed in claim 1, wherein Said shank (3) is substantially a cylindrical part with a depressed flat portion (4).

3. The tool for boring and chamfering of tubes in Edge preparation machine as claimed in claim 1 or 2, wherein the body (2) is a solid longitudinal member ending with the boring tip, in which said boring tip is having rectilinear section with a hole (5) at the centre for fixing star screw (1).

4. The tool for boring and chamfering of tubes in Edge preparation machine as claimed in claims 1-3, wherein the body (2) includes a substantially circular base (2A) supporting there above an elongated member (2B) having irregular shape.

5. The tool for boring and chamfering of tubes in Edge preparation machine as claimed in claims 1-4, wherein the boring tool (100) is fixed with tool holder (400) clamped with machine spindle (500), in which the boring tool (100) with the tip in machine spindle (500) rotates and does the boring operation of the tubes (200).

6. The tool for boring and chamfering of tubes in Edge preparation machine as claimed in claims 1-5, wherein the parameters of the tool are as follows as an example:
- Total length: 57 mm
- Boring length of the tool 20mm in tubes
- Maximum width: 19 mm
- Tool width (After grinding) at Tip: 11 mm
- Width of shank:16mm

7. The tool for boring and chamfering of tubes in Edge preparation machine as claimed in claims 1-6, wherein the tool (100) is fixed with tool holder (400) in machine spindle (500) and the tube (200) is clamped by chuck (300).
, Description:“A TOOL FOR BORING AND CHAMFERING OF TUBES IN EDGE PREPARATION MACHINE”

FIELD OF THE INVENTION:
[001] The field of the invention is related to dealing with boring and chamfering problem in edge preparation machine by using boring and chamfering tool. More particularly, the invention relates to tube cutting and chamfering of lower diameter 31.8 tube.

BACKGROUND OF THE INVENTION:
[002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.

[003] Steam generators used for power generation have several components like super heaters, re-heaters, economisers and water wall panels. Most of the tube raw materials supplied in length of 10meters by domestic as well as foreign tube suppliers. In re-heater, economisers and super-heater coils have design requirement up to 40 meters length.so, during the process length maintenance in order to get cutting, chamfering of tubes, “known as Automatic Tube cutting & Edge Preparation machine (ATCEP) is used.

[004] Edge preparation comprises of removing materials along edges of metal surfaces. Edges must be prepared for welding when parts assemblies require certain strength.

[005] Several materials grades are used in boiler tubes for example carbon steel (Gr A1, Gr C), Low alloy steel (T11, T12 & T23), High alloy steel (T23, T91, T92) and stainless steel (347H, Super304H).

[006] The machine is to be designed and constructed for measuring, cutting, chamfering and edge preparation automatically from tube feed to discharge. The edge preparation involves cutting, facing, chamfering, boring to correct size of internal diameter, depending on job requirement. The edge preparation profile normally to form “V” Groove and “J” Groove style Weld Joint preparation when the tubes butt against each other.

[007] The lower diameter tube of about 31.8mm can’t be accommodated in this machine, because machine is designed for diameter of 38mm to 76.mm.

[008] In view of the above, the present invention has been introduced.

OBJECTS OF THE INVENTION:
[009] An object of the invention is to provide a tool for boring and chamfering of tubes in Edge preparation machine.

[0010] Another object of the invention is to provide a tool for boring and chamfering of tubes in Edge preparation machine, which is simple in construction.

[0011] A still further object of the invention is to provide a tool for boring and chamfering of tubes in Edge preparation machine, which reduces the errors of boring and chamfering.

[0012] These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description taken in conjunction with the accompanying drawings in which a preferred form of the present invention is illustrated.

SUMMARY OF THE INVENTION:
[0013] One or more drawbacks of conventional systems and process are overcome, and additional advantages are provided through the apparatus/composition and a method as claimed in the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be part of the claimed disclosure.

[0014] Accordingly, there is provided a boring tool for setting the required lower diameter of 31.8mm cutting and chamfering process in edge preparation machine. This new chamfering and boring tool used in edge preparation consists of removing materials along edges of metal surfaces. This process prepares edges for welding when parts assemblies require certain strength.

[0015] Before old tool was inserted as per job and boring tool was broken and not suitable. Next old known tool was grinding several times, therefore the tool was damaged and tubes also got damaged. Finally, new tool was devised.

[0016] The tool was subjected to heat-treatment process and finally hardness checking through hardness testing machine. Thereafter, the tool was approved by Tool Engineering department of Applicant.

[0017] 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.

[0018] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.
[0019] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
[0020] The illustrated exemplary embodiments of the subject matter will be best 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 processes that are consistent with the subject matter as claimed herein, wherein:-

Figure 1 shows: a tool for boring and chamfering of tubes in Edge preparation machine according to the present invention.

Figure 1A shows: whole structure of boring tool of the invention.

Figure 2 shows: tool holder used in the invention.

Figure 3 shows: assembly of tool with Edge preparation machine in accordance with the invention.

[0021] The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily 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 OF PREFERRED EMBODIMENT OF THE INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS:
[0022] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.

[0023] The present invention makes a disclosure regarding a technology pertaining to a tool for boring and chamfering of tubes in Edge preparation machine.

[0024] Now, reference may be made to Figure-1 showing the new boring tool for lower diameter tubes i.e. around diameter of 31.8 mm tubes for Edge preparation and Boring of tubes in Edge preparation machine. The tool of the invention is applicable for the tube having diameter up to 37 mm and length of 2.2-14.8 meter.

[0025] Referring to Figure 1A indicating whole structure of the boring tool of the invention constituting a single piece. The boring tool comprises of boring tip fixed with star screw (1) provided at the top of body (2) and the body (2) is placed above shank (3).

[0026] Said shank (3) is substantially a cylindrical part with a depressed flat portion (4). The body (2) is a solid longitudinal member ending with the boring tip. Said boring tip is having rectilinear section with a hole (5) at the centre for fixing star screw (1). The body (2) includes a substantially circular base (2A) supporting there above an elongated member (2B) having irregular shape.

[0027] The boring tool is fixed with tool holder (as shown in Figure 2) clamped with machine spindle.

[0028] The boring tool with the tip in machine spindle rotates and does the boring operation of the required tubes.

[0029] The parameters of the tool (Figure 1) of the invention are as follows:
- Total length: 57 mm
- Boring length of the tool 20mm in tubes
- Maximum width: 19 mm
- Tool width (After grinding) at Tip: 11 mm
- Width of shank: 16mm

[0030] The above parameters may be taken as example without restricting scope of the invention to the same.

[0031] The Boring tip fixed in the tool is used for boring and chamfering in lower diameter tubes even less than 31.8 mm. The tool is fixed with tool holder in machine spindle clamped by universal chuck. This was not possible in old tool to do boring and chamfering in lower diameter rather it was damaging the tube ends and boring tool.

[0032] The tool body was ground up to 11 mm tangentially up to the end of the tool. It was found ok for the boring and chamfering in lower diameter tubes and got success. The boring tool for lower diameter tubes is used for Edge preparation and Boring process.
[0033] The tool is mounted on the tool holder in the tool mounting head which is controlled by Servo motor.

[0034] In this machining process, Tubes are fixed and the tool rotates for facing, chamfering and boring.
[0035] After the Edge preparation process, the prepared tubes are taken further for welding process like FBW, IPW, OTIG and STBW to form the coils.

[0036] By the same way explained above, the edge preparation process for various lower diameters and various thickness of tubes can be performed successfully.
Technical Advantages:
1. Tube dia. 31.8 mm boring achieved and project completed (210 MT)
2. Productivity increased (8800 tube ends prepared)
3. Quality improved
4. Tube damage avoided
5. Tool life increased

Economic Significance:
1. Increase in productivity
2. Reduction in cycle time
3. Cost reduction due to reduced cycle time
4. Improvement in safety
5. Timely delivery of product
6. Reduction in cycle time in boring process by 76%
7. 3.71 % times increase in productivity

Working of Invention:
[0037] The tool (100) is fixed in spindle chuck (300) for accurate lower boring process. The tool (100) held by tool holder (400) runs with machine spindle (500) for tubes boring and chamfering with rotation of the tool. Here, edge preparation consists of removing materials along edges of metal surfaces.

[0038] As shown in the Fig-3, the tube (200) which is going to be prepared is set for cutting and chamfering tubes.
[0039] We first know about the requirement of dia and lower bore from cutting plan given by planning department. By using the boring tool which is fitted in the machine spindle the required lower bore is set by fine adjustment of the boring tool of invention (Fig-1).

[0040] Before start the boring and chamfering setting, it has to fix the boring tool for the required lower diameter by using measurement. The tool is fixed with the machine spindle chuck. With the fine adjustment in boring tool (ig-1) it has to set the accurate lower IB (inner bore) surface. After boring setting, by using the boring tool it can operate the spindle chuck with the operator panel itself. The tool along with spindle chuck and inner bore finished the tube accurately in machine.

[0041] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.

[0042] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.

[0043] 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 particulars 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 analogues 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”.

[0044] The above description does not provide specific details of manufacture or design of the various components. Those of skill in the art are familiar with such details, and unless departures from those techniques are set out, techniques, known, related art or later developed designs and materials should be employed. Those in the art are capable of choosing suitable manufacturing and design details.

[0045] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.

[0046] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.

[0047] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.