Description:“A METHOD OF MANUFACTURING OF SEAMLESS SQUARE STEEL TUBES IN COLD DRAWING PROCESS”

FIELD OF INVENTION
The present invention relates generally to the manufacturing of seamless square steel tubes. More particularly the invention relates to making of seamless square tubes in cold drawing process, still more particularly the invention relates to dies used in the cold drawing process.

BACKGROUND OF THE INVENTION

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.
Normally in the manufacturing of the seamless steel round 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 square tube is controlled by the Square Draw Die. Inside diameter and Wall thickness of the tube is controlled by the square draw Plug. The front end of the hollow is pointed to a diameter less than the Draw die inside diameter for ease of 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.
The similar cold drawing process can be carried out for the square tubes from the round hollows.
The present Invention has been introduced for the production of square tubes with the available round tubes.
OBJECTS OF THE INVENTION
It is therefore an object of the present invention to propose a method of making square tubes using the available round tubes.
Another object of the present invention is to use fresh square drawing die and plug for cold drawing square tubes.
Still another object of the invention is to propose a method of making square tubes, which is simple.
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

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.
The square drawing die is machined along with two outer flanges as per the drawings. Top and bottom flanges are made from 25 mm thick plate. The outer diameter of the flanges are 150 mm. 3 holes are made at 120 degrees in the top flange. The 3 holes are counter bored in the top flange for accommodating the bolt head. Step for dia 90 mm for 20 mm depth is made in both the flange for the square draw die mounting. For the bottom flange, M12 threaded hole is made at 120 degrees.

The die is machined out of 40 mm thick plate. The outer diameter of the die is 90mm which seats in between both the flanges. 40 mm square is machined with a taper of 31 degrees with a land of 10 mm. Square corners are made with the radius of 3 mm.

The die is push fitted in the bottom flange. The top flange is then fitted above the die matching the threaded holes in the bottom flange. The die assembly is then tightened with the M12 bolts on the top flange. The bolt heads are seated inside the counter bores on the top flange.

Further the square plug is machined with sides 32 mm with length 50 mm.

The Square tube drawing die assembly is ready for setting up in the draw bench. The die controls the outer square size & internal square uniformity is maintained by the square plugs.

Thus, according to the invention there is provided a method of manufacturing of seamless square steel tubes in cold drawing process comprising the following steps:

-Machining of square drawing die along with two outer flanges as per the drawings;

-Making of Top (101) and bottom flanges (102) from 25 mm thick plate, wherein the outer diameter of the flanges is 150 mm and multiple holes (106) are made at 120 degrees in the top flange (101);

-Counter boring holes in the top flange (101) for accommodating bolt head (104);

-Preparing Step (105) for dia 90 mm for 20 mm depth in both the flange for the square draw die (103) mounting, wherein for the bottom flange (102), threaded hole (110) is made at 120 degrees;

-Machining the die (108) out of 40 mm thick plate, in which the outer diameter of the die (103) is 90mm which seats in between both the flanges;

-Machining 40 mm square with a taper of 31 degrees with a land of 10 mm (108), wherein Square corners are made with the radius of 3 mm;

-Push fitting the die (103) in the bottom flange (102), wherein the top flange (101) is fitted above the die matching the threaded holes (110) in the bottom flange (102), wherein the die assembly is tightened with the M12 bolts (104) on the top flange and the bolt heads (104) are seated inside the counter bores (107) on the top flange (101).
-Machining square plug (111) with sides of 32 mm with length of 50 mm.

The Square tube drawing die assembly is ready for setting up in the draw bench.

The die controls the outer square size and internal square uniformity is maintained by the square plugs.
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.

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.

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
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:-
Figure-1 shows: Details of top mounting flange which is on the square tube drawing side according to present invention.
Figure-2 shows: Details of the bottom flange which is mounted on the draw bench in accordance with invention.
Figure-3 shows: Details of square drawing die.
Figure-4 shows: Square plug.

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 INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS
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.

The present invention makes a disclosure regarding a technology pertaining to invention on a method of manufacturing of seamless square steel tubes in cold drawing process.
The square drawing die is machined along with two outer flanges as per the drawings. Top (101) and bottom flanges (102) are made from 25 mm thick plate. The outer diameter of the flanges are 150 mm. 3 holes (106) are made at 120 degrees in the top flange (101). The 3 holes are counter bored (101) in the top flange (101) for accommodating the bolt head (104). Step (105) for dia 90 mm for 20 mm depth is made in both the flange for the square draw die (103) mounting. For the bottom flange (102), M12 threaded hole (110) is made at 120 degrees.

The die (108) is machined out of 40 mm thick plate. The outer diameter of the die (103) is 90mm which seats in between both the flanges. 40 mm square is machined with a taper of 31 degrees with a land of 10 mm (108). Square corners are made with the radius of 3 mm.

The die (103) is push fitted in the bottom flange (102). The top flange (101) is then fitted above the die matching the threaded holes (110) in the bottom flange (102). The die assembly is then tightened with the M12 bolts (104) on the top flange. The bolt heads (104) are seated inside the counter bores (107) on the top flange (101).

Further the square plug (111) is machined with sides 32 mm with length 50 mm.

The Square tube drawing die assembly is ready for setting up in the draw bench. The die controls the outer square size & internal square uniformity is maintained by the square plugs.

By the above new invention, drawing of seamless square tubes can be done with controlled outer & internal dimensions.
- Paves way for new product manufacturing i.e., cold drawn square tubes.

ADVANTAGES OF INVENTION

-Drawing of round shaped tubes to square shaped tubes.

LIST OF THE COMPONENTS
(101) – Top Flange
(102) – Bottom flange
(103) – Square Draw Die
(104) – Mounting bolts
(105) – Step in the Top flange
(106) – Holes in the Top flange
(107) – Counter bore in the Top flange
(108) – Die material
(109) – Step in the Bottom flange
(110) – Internal thread in the Bottom flange
(111) – Square Plug

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.

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.
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”.

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.
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.
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.
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.
, Claims:We Claim
1. A method of manufacturing of seamless square steel tubes in cold drawing process comprising the steps of:
-Machining of square drawing die along with two outer flanges;

-Making of Top (101) and bottom flanges (102) from 25 mm thick plate,

-Counter boring holes in the top flange (101) for accommodating bolt head (104);

-Preparing Step (105) for dia 90 mm for 20 mm depth in both the flange for the square draw die (103) mounting,

-Machining the die (108) out of 40 mm thick plate,

-Machining 40 mm square with a taper of 31 degrees with a land of 10 mm (108),

-Push fitting the die (103) in the bottom flange (102), wherein the top flange (101) is fitted above the die matching the threaded holes (110) in the bottom flange (102), wherein the die assembly is tightened with the bolts (104) on the top flange and the bolt heads (104) are seated inside the counter bores (107) on the top flange (101).

2. The method as claimed in claim 1, wherein the outer diameter of the flanges is 150 mm and multiple holes (106) are made at 120 degrees in the top flange (101).

3. The method as claimed in claim 1 or 2,wherein for the bottom flange (102), threaded hole (110) is made at 120 degrees.

4. The method as claimed in claims 1-3, wherein the outer diameter of the die (103) is 90mm which seats in between both the flanges.

5. The method as claimed in claims 1-4,wherein Square corners are made with the radius of 3 mm.

6. The method as claimed in claims 1-5, comprising machining square plug (111) with sides of 32 mm with length of 50 mm.

7. The method as claimed in claims 1-6, wherein the die controls the outer square size and internal square uniformity is maintained by the square plugs.

Dated This 30th Day of March, 2024