Claims:WE CLAIM:

1. A method of making of seamless tubes in cold drawing process comprising the steps of:
- making a pointing die by taking a drawing die called as pointing die (101);
- mounting a guide flange (103) in the front side of the pointing die (101) by tightening the guide flange (103) with fasteners (104) with multiple holes pointed with 120 degrees equally spaced on all the components of mounting flange (102), pointing die (101) and guide flange (103);
- filling of Carbide material (108) in counter bore (107) of the pointing die (101);
- making a step in the guide flange (103) for a projection to insert the step (109) inside the carbide material (108);
- the mounting flange is provided with multiple holes equally spaced on the circumference for connecting the pointing die (101), mounting flange (102) and guide flange (103).

2. The method as claimed in claim 1, wherein the counter bore (107) in the pointing die (101) is filled with carbide material (108) prior to the assembly.

3. The method as claimed in claim 1 or 2, wherein the projection is having length of about 4mm with diameter of about 64mm.

4. The method as claimed in claims 1-3, wherein making a step in the guide flange (103) for a projection to insert the step (109) inside the carbide material (108) makes the perfect seating of pointing die (101) with guiding flange (103) that during the return stroke, the guide flange (103) does not come out of the pointing die (101) which is used in the forward stroke for drawing operation along with mounting flange (102).

5. The method as claimed in claims 1-4, wherein the mounting flange is provided with multiple holes of diameter about 18mm with about 120 degrees.

6. The method as claimed in claims 1-5, wherein in addition to the multiple holes on the mounting flange (102) another set of multiple holes with about 120 degrees equally spaced is made with internal thread (110) to connect the mounting flange (102) with draw bench.

7. The method as claimed in claims 1-6, wherein a step (105) is provided in the mounting flange (102) to seat in the turrent head.
, Description:A method of making of seamless tubes in cold drawing process

FIELD OF INVENTION :
[001] The present invention relates generally to the manufacturing of seamless steel pipes. More particularly the invention relates to making of seamless tubes in cold drawing process still more particularly the invention relates to dies used in the cold drawing process.

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] Normally in the manufacturing of the seamless steel tubes, the smaller diameter tube is derived from the bigger size Hollows. For example, if the outside diameter required is 38mm, then the outer diameter more than 44mm hollow is being used. This method is called the cold drawing process. Outside diameter of the tube is controlled by the Draw Die inside diameter and Wall thickness of the tube is controlled by the Outside diameter of the Draw Plug. The front end of the hollow is pointed to a diameter less than the Draw die inside diameter for ease in the entry of the larger diameter Hollow inside the draw die and to hold the pointed end by the gripper jaw during drawing process in draw bench. For example, if the Tube outside diameter required is 30mm, a Hollow diameter of 38mm is pointed to a diameter of 29mm in the drawing die through gripper jaw in the pointing machine for drawing of the required tube size of 30mm outside dimeter. The pointing die required in this process is having diameter 29mm. Due to non-availability of this pointing die, Hollow diameter 38mm is pointed in two stages. First, the Hollow is pointed to a diameter of 33 mm and then Pointed to a diameter of 26.7mm. Because of using 26.7mm pointing die instead of 29mm pointing die, the tube end damage occurs due to bending.

[004] In order to solve this problem an alternate method of manufacturing is to be devised. Hence, the present invention has been introduced, which can address shortcomings of the prior art(s) and serve the purpose effectively.

OBJECTS OF THE INVENTION:
[005] An object of the present invention is to propose a method of making lesser diameter seamless steel pipes, which obviates drawbacks of the prior art(s).

[006] Another object of the present invention is to use the drawing die as pointing die for any smaller diameter of the cold drawing.

[007] Still another object of the present invention is to propose a method of making lesser diameter seamless steel pipes, which is simple.

[008] 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:
[009] 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.

[0010] The pointing die is made with taking drawing die and now it is hence forth called as pointing die by mounting the guide flange in the front side of the pointing die by means of tightening it with mounting bolts with 3 number of holes provided with about 120 degrees equally spaced on all the components of mounting flange, pointing die and guide flange. Earlier to this assembly, the counter bore in the pointing die is filled with carbide material. A step in the guide flange for a projection length of for example 4mm with diameter of for example 64mm is made to insert this step inside the carbide material. This will make the perfect seating of pointing die with guiding flange so that during the return stroke, the guide flange will not come out of the pointing die which is used in the forward stroke for drawing operation along with mounting flange. The mounting flange is provided with 3 holes of diameter (about 18mm) with about 120 degrees equally spaced on the circumference for connecting the pointing die, mounting flange and guide flange as already explained above.

[0011] In addition to these three holes on the mounting flange another set of three holes with about 120 degrees equally space is made with internal thread to connect the mounting flange with draw bench. A step is provided in the mounting flange to accommodate the cavity in the draw bench.

[0012] 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.

[0013] 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.

[0014] 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 :
[0015] The illustrated 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:-

[0016] Figure -1 shows the details of mounting flange which is on the pipe drawing side according to present invention.
[0017] Figure-2 shows the details of the pointing die of the present invention.
[0018] Figure-3 shows the details of the guide flange in the present invention.
[0019] Figure-4 shows the assembly of mounting flange, pointing die and guide flange in accordance with the present invention.

[0020] 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 THE INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS OF PREFERRED EMBODIMENT(S):
[0021] 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.

[0022] The invention makes a disclosure regarding a technology pertaining to a method of making lesser diameter seamless steel pipes.
[0023] Reference may be made to the Figures 1-4, which indicate exemplary embodiment(s) of the present invention without restricting scope of the invention to the same.

[0024] Accordingly, the pointing die is made by taking drawing die and now it is hence forth called as pointing die (101). Here, the guide flange (103) is mounted in the front side of the pointing die (101) by tightening the guide flange (103) with mounting bolts (104) with plurality of holes pointed with 120 degrees equally spaced on all the components of mounting flange (102), pointing die (101) and guide flange (103).

[0025] Prior to this assembly, the counter bore (107) in the pointing die (101) is filled with carbide material (108). A step in the guide flange (103) for a projection length of about 4mm with diameter of about 64mm is made to insert this step (109) inside the carbide material (108). This makes the perfect seating of pointing die (101) with guiding flange (103) so that during the return stroke, the guide flange (103) does not come out of the pointing die (101) which is used in the forward stroke for drawing operation along with mounting flange (102). The mounting flange (102) is provided with multi tapped holes (106) of diameter (about 18mm) with 120 degrees equally spaced on the circumference for connecting the pointing die (101), mounting flange (102) and guide flange (103) as already explained above.

[0026] In addition to these three holes on the mounting flange (102) another set of three holes with 120 degrees equally spaced is made with internal thread (110) to connect the mounting flange (102) with draw bench (not shown). The purpose of not showing the draw bench is that it is conventional process. A step (105) is provided in the mounting flange (102) to seat in the turrent head.

[0027] By the above method of connecting the components, any size of drawing die can be converted as pointing die (101).

Advantageous Features of the Invention:
• Rejection due to bending of the tube.
• Prevention of Bending of point end.
• Prevention of Breakage of other connected components in the machine.
• Increase in Production capacity to 56%.
• Paves way for uninterrupted production.

[0028] 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.

[0029] 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.

[0030] 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 analogue 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”.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

LIST OF THE COMPONENTS OF INVENTION

101 – Pointing die
102 – Mounting flange
103 – Guiding flange
104 – Mounting bolts
105 – Step of projection in the mounting flange
106 – Holes in the mounting flange
107 – Counter bore in the pointing die
108 – Carbide material
109 – Step
110 – Internal thread