Claims:We Claim:

1. A device (100) for removing of oxide layers on a hot rolled low carbon wire rod (112), comprising:
a base frame (114) comprising a first base frame (101), a second base frame (102) disposed in a first plane, and a third base frame (103), a fourth base frame (104) disposed in a second plane);
a plurality of rollers comprising a first roller (105) positioned on the first base frame (101), a second roller (106) positioned on the second base frame (102), a third roller (107) positioned on the third base frame (103) and a fourth roller (108) positioned on the fourth base frame (104);
wherein, the first plane and the second plane are perpendicular to each other;
wherein, the first roller (105), the second roller (106) are at an angle ? with an axis A-A, the third roller (107) and the fourth roller (108) are at an angle ? with an axis B-B; and
wherein, the hot rolled low carbon wire rod (112) pass through each of the first roller (105), the second roller (106), the third roller (107) and the fourth roller (108) at a contact angle of 180 degrees of an outer surface.
2. The device (100) as claimed in claim 1, wherein the angle ? of the first roller (105) and the second roller (106) with the axis A-A and the angle ? of the third roller (107) and the fourth roller (108) with the axis B-B is 135 + 5 degrees.
3. The device (100) as claimed in claim 1, wherein each of the plurality of rollers is defined with a groove (115), the hot rolled low carbon wire rod (112) is configured to pass through the groove (115) at the contact angle of 180 degrees of the outer surface.
4. The device (100) as claimed in claim 3, wherein the groove (115) is defined with a contact portion (109) which is manufactured of Tungsten carbide.
5. The device (100) as claimed in claim 1, wherein each of the plurality of rollers are manufactured by alloy steel.
6. The device (100) as claimed in claim 1, wherein diameter of each of the plurality of rollers ranges from about 80mm to 90mm.
7. The device (100) as claimed in claim 1, wherein the plurality of rollers are configured to bend the hot rolled low carbon wire rod (112) for elastically elongating the hot rolled low carbon wire.
8. The device (100) as claimed in claim 7, wherein the elastic elongation of the hot rolled low carbon wire rod (112) is 4% to 6% of its total length.
9. The device (100) as claimed in claim 1, wherein the hot rolled low carbon wire rod contacts two alternate 180 degrees of an outer surface with the first roller (105) and the second roller (106) in the first plane and, again contacts two alternate 180 degrees of the outer surface with the third roller (107) and the fourth roller (108), in the second plane.
10. A system (200) for removing of oxide layers on a hot rolled low carbon wire rod (112), comprising:
a wire rod pay-off unit (201), configured to guide the hot rolled low carbon wire rod (112) from a casting chamber;
a device (100) for removing the oxide layers, the device (100) comprising:
a base frame (114) comprising a first base frame (101), a second base frame (102) disposed in a first plane, and a third base frame (103), a fourth base frame (104) disposed in a second plane;
a plurality of rollers comprising a first roller (105) positioned on the first base frame (101), a second roller (106) positioned on the second base frame (102), a third roller (107) positioned on the third base frame (103) and a fourth roller (108) positioned on the fourth base frame (104);
wherein, the first plane and the second plane are perpendicular to each other;
wherein, the first roller (105), the second roller (106) are at an angle ? with an axis A-A, the third roller (107) and the fourth roller (108) are at an angle ? with an axis B-B;
wherein, the hot rolled low carbon wire rod (112) is configured to pass through each of the first roller (105), the second roller (106), the third roller (107) and the fourth roller (108) at a contact angle of 180 degrees of an outer surface; and
a retracting unit for guiding the hot rolled low carbon wire rod (112) from the device (100).
11. The system (200) as claimed in claim 10, wherein the angle ? of the first roller (105) and the second roller (106) with the axis A-A and the angle ? of the third roller (107) and the fourth roller (108) with the axis B-B ranges 135 + 5 degrees.
12. The system (200) as claimed in claim 10, wherein the plurality of rollers are configured to bend the hot rolled low carbon wire rod (112) for elastically elongating the hot rolled low carbon wire rod (112).
13. The system (200) as claimed in claim 10, wherein the hot rolled low carbon wire rod contacts two alternate 180 degrees of an outer surface with the first roller (105) and the second roller (106) in the first plane and again contacts two alternate 180 degrees of the outer surface with the third roller (107) and the fourth roller (108), in the second plane.
Dated this 29th March 2022

GOPINATH A S
IN/PA 1852
OF K&S PARTNERS
AGENT FOR THE APPLICANT
, Description:FORM 2
THE PATENTS ACT, 1970
[39 of 1970]
&
THE PATENTS RULES, 2003

COMPLETE SPECIFICATION
[See Section 10 and Rule 13]

TITLE: “A DEVICE FOR REMOVING OXIDE LAYERS ON A HOT ROLLED LOW CARBON WIRE ROD”

Name and Address of the Applicant:
TATA STEEL LIMITED, Jamshedpur, Jharkhand, India 831001.

Nationality: INDIAN

The following specification particularly describes the nature of the invention and the manner in which it is to be performed.

TECHNICAL FIELD

Present disclosure in general relates to field of Metallurgy. Particularly, but not exclusively, the present disclosure relates to removing oxide layers. Further, embodiments of the disclosure discloses a device for removing oxide layers on an outer surface of a hot rolled low carbon wire rod.

BACKGROUND OF THE DISCLOSURE

Steel wire drawing operation is a cold forward extrusion process, which involves pulling of an input hot rolled wire rod through a single or series of conically converging drawing dies. Before drawing the wire rod, it is necessary to optimize the wire rod surface and make it conducive for the drawing operation. One of the primary and important steps towards surface optimization is removal or removing of oxides adhering on the wire rod surface. The oxides present on the hot rolled wire rod surface interfere with smooth drawing, by increasing the friction at die- hot rolled wire rod interface. This results in generation of surface defects, breakages during drawing and also increase die wear, which leads to frequent die changes and loss of productivity.

Considering the above, it is inevitable to remove the oxides present on the hot rolled wire rod. Several techniques have been employed conventionally, to remove the oxides present on the hot rolled wire. One such technique is an acid pickling process, which involves use of acids such as Hydrochloric acid (HCL). The acid dissolves the oxides by chemically reacting with it. While acid pickling is an effective way of complete oxide removal and preparation of wire rod surface for drawing, there are associated environmental concerns as well as huge cost involved to set up and maintain an acid pickling plant, which is undesired. Another technique is mechanically removing the oxides on the hot rolled wire rod, which involves bending hot rolled wire rods, which create an elastic elongation on wire rod surface to detach the brittle oxides. However during bending of wire rods, complete cross section of round wire rods does not experience strain (or enough strain) and there are left over oxides, sticking to the wire rod surface. These oxides may enter into the drawing dies leading to generation of surface defects, breakages during drawing and also increases die wear leading to frequent die changes, which again is undesired.

The present disclosure is directed to overcome one or more limitations stated above or any other limitation associated with the prior arts.

SUMMARY OF THE DISCLOSURE

One or more shortcomings of the prior art are overcome by a device and a system as disclosed and additional advantages are provided through the device and the system as described in the present disclosure.

Additional features and advantages are realized through the technique of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.

In one non-limiting embodiment, a device for removing of oxide layers on a hot rolled low carbon wire rod. The device includes a base frame comprising a first base frame, a second base frame disposed in a first plane, a third base frame and a fourth base frame disposed in a second plane. Further, the device includes a plurality of rollers comprising a first roller positioned on the first base frame, a second roller positioned on the second base frame, a third roller positioned on the third base frame and a fourth roller positioned on the fourth base frame.
The first plane and the second plane are perpendicular to each other. The first roller, the second roller are at an angle ? with an axis A-A, the third roller and the fourth roller are at an angle ? with an axis B-B. The hot rolled low carbon wire rod is configured to pass through each of the first roller, the second roller, the third roller and the fourth roller at a contact angle of 180 degrees of an outer surface.

In an embodiment, the angle ? of the first roller and the second roller with the axis A-A and the angle ? of the third roller and the fourth roller with the axis B-B ranges from 135 + 5 degrees.
In an embodiment, each of the plurality of rollers is defined with a groove, the hot rolled low carbon wire rod is configured to pass through the groove at the contact angle of 180 degrees of the outer surface.
In an embodiment, the groove is defined with a contact portion which is manufactured of tungsten carbide.
In an embodiment, each of the plurality of rollers are manufactured by alloy steel.
In an embodiment, diameter of each of the plurality of rollers ranges from about 80mm to 90mm.
In an embodiment, the plurality of rollers are configured to bend the hot rolled low carbon wire rod for elastically elongating the hot rolled low carbon wire.
In an embodiment, the elastic elongation of the hot rolled low carbon wire rod is 4% to 6% of its total length.
In an embodiment, the hot rolled low carbon wire rod contacts two alternate 180 degrees of the outer surface with the first roller and the second roller in the first plane and, again contacts two alternate 180 degrees of the outer surface with the third roller and the fourth roller, in the second plane.
In another exemplary embodiment, a system for removing of oxide layers on a hot rolled low carbon wire rod. The system may include a wire rod pay-off unit, which is configured to guide the hot rolled low carbon wire rod from a casting chamber. Further the system includes a device for removing the oxide layers, the device includes device for removing of oxide layers on a hot rolled low carbon wire rod. The device includes a base frame comprising a first base frame, a second base frame disposed in a first plane, a third base frame and a fourth base frame disposed in a second plane. Further, the device includes a plurality of rollers comprising a first roller positioned on the first base frame, a second roller positioned on the second base frame, a third roller positioned on the third base frame and a fourth roller positioned on the fourth base frame. The first plane and the second plane are perpendicular to each other. The first roller, the second roller are at an angle ? with an axis A-A, the third roller and the fourth roller are at an angle ? with an axis B-B. The hot rolled low carbon wire rod is configured to pass through each of the first roller, the second roller, the third roller and the fourth roller at a contact angle of 180 degrees of an outer surface. Additionally, the system includes a retracting unit for guiding the hot rolled low carbon wore rod from the device.

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 FIGURES

The novel features and characteristics of the disclosure are set forth in the appended description. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:

Figure. 1 illustrates a perspective view of a system for removing oxides, in accordance with an embodiment of the present disclosure.

Figure. 2 illustrates a perspective view of a device for removing of the oxides, in accordance with an embodiment of the present disclosure.

Figure. 3 illustrates a sectional view of a roller of the device, in accordance with an embodiment of the present disclosure.

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 apparatus and system illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION

The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. Additional features and advantages of the disclosure will be described hereinafter which form the subject of the description of the disclosure. It should also be realized by those skilled in the art that such equivalent devices and systems depart from the scope of the disclosure. The novel features which are believed to be characteristic of the disclosure, as to operation of the device and the system, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.

In the present document, the word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment or implementation of the present subject matter described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail 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 spirit and the scope of the disclosure.
In the following detailed description, embodiments of the disclosure are explained with reference of accompanying figures that form a part hereof, and in which are shown by way of illustration specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
Figure. 1 is an exemplary embodiment of the present disclosure, illustrating a system (200) for removing of oxide layers on a hot rolled low carbon wire rod (112). The system (200) may include a wire rod pay-off unit (201). The wire rod pay-off unit (201) may be configured to guide the hot rolled low carbon wire rod coil. Further, the system (200) may include a device (100) [best seen in Figure. 2] for removing of oxide layers on an outer surface of the hot rolled low carbon wire rod (112). The device (100) may include a base frame (114), which may be supported by a plurality of vertical members (113) which may contact a ground surface. The base frame (114) may act as a platform for supporting components of the device (100). The base frame (114) may include a first base frame (101), a second base frame (102), a third base frame (103) and a fourth base frame (104). The first base frame (101) and the second base frame (102) may be disposed inclinedly in a first plane, and the third base frame (103) and the fourth base frame (104) may be also disposed inclinedly in a second plane. The first plane and the second plane may be perpendicular to each other. In an embodiment, the first base frame (101) and the second base frame (102) may be offset to each other in the first plane, the third base frame (103) and the fourth base frame (104) may be offset to each other in the second plane. As apparent from Figure. 2, the device (100) may include a plurality of rollers positioned on the base frame. The plurality of rollers may include a first roller (105), which may be positioned on the first base frame (101), the second roller (106) which may be positioned on the second base frame (102), the third roller (107) which may be positioned on the third base frame (103) and the fourth roller (108) which may be positioned on the fourth base frame (104).
In an embodiment, first roller (105), the second roller (106), the third roller (107) and the fourth roller (108) may include a diameter ranging from about 80mm to 90mm.
Referring further to Figure. 2, the first roller (105) and the second roller (106) may be positioned on the first base frame (101) and the second base frame (102), respectively such that, the first roller (105) and the second roller (106) may be at an angle ? with an axis A-A. Further, the third roller (107) and the fourth roller (108) may be positioned on the third base frame (103) and the fourth base frame (104), respectively such that, the third roller (107) and the fourth roller (108) may be at angle ? with an axis B-B. In an embodiment, the angle ? may range from 135 + 5 degrees.
In an embodiment, each of the first roller (105), the second roller (106), the third roller (107) and the fourth roller (108) may be defined with a groove (115) [best seen in Figure. 3]. The groove (115) may be defined along an outer circumference of the rollers (105, 106, 107, 108). In an embodiment, the groove (115) may be a V-groove. As seen in Figure. 3, the groove (115) may be defined with a contact portion (109) which may be made of tungsten carbide and remaining portions of the rollers (105, 106, 107, 108) may be made of steel alloys. Further, each of the plurality of rollers (105, 106, 107, 108) may be configured such that, the hot rolled low carbon wire rod (112) may pass through each of the first roller (105), the second roller (106), the third roller (107) and the fourth roller (108) at a contact angle of 180 degrees of the outer surface. In another words, 180 degrees of the outer surface of the hot rolled low carbon wire rod (112) may contact each of the first roller (105), the second roller (106), the third roller (107) and the fourth roller (108). In an embodiment, the first roller (105), the second roller (106), the third roller (107) and the fourth roller (108) may be configured to bend the hot rolled low carbon wire rod (112) for elastically elongating the hot rolled low carbon wire. As an example, the plurality of rollers may be configured to elastically elongate the hot rolled low carbon wire rod (112) up to 4% to 6% of its total length.
In an embodiment, the configuration i.e., arrangement of the plurality of rollers (105, 106,107, 108) may facilitate in 360 degree contact (thus, entire outer surface) contact of the hot rolled low carbon wire rod (112) in the first plane [i.e., with the first roller (105) and the second roller (106)] and again 360 degree contact in the second plane (i.e., with the third roller (107) and the fourth roller (108)). In other words (180), hot rolled low carbon wire rod contacts two alternate 180 degrees of an outer surface with the first roller (105) and the second roller (106) in the first plane and, again contacts two alternate 180 degrees of the outer surface with the third roller (107) and the fourth roller (108), in the second plane. Therefore, entire outer surface may be subjected to uniform bending in the device (100) for two passes around the plurality of rollers (105, 106, 107, 105) resulting in uniform elastic elongation of the hot rolled low carbon rod. This facilitates uniform straining of the hot rolled low carbon wire rod (112). Uniform straining the hot rolled low carbon wire rod (112) may result in removing the oxide layers present throughout the outer surface of the hot rolled low carbon wire rod (112), unlike conventional techniques which fail to provide uniform bending, thereby retaining the oxide layers on the hot rolled low carbon wire rod (112).
In an embodiment, the configuration facilitates in achieving 360 degree contact of the hot rolled low carbon wire rod (112) by using two rollers in each plane, unlike conventional systems which require three or more rollers in each plane for achieving 360 degree contact of the hot rolled low carbon wire rod (112). Thus, the configuration of the device (100) aids in minimizing the number of rollers used to achieve 360 degree contact of the outer surface of the hot rolled low carbon wire rod (112), thereby making the device (100) compact and cost effective.
In an operational embodiment, to remove the of the oxide layers on the hot rolled low carbon wire rod (112), the hot rolled low carbon wire rod (112) may be guided from the casting chamber by the wire rod pay-off unit (201), towards the device (100). The hot rolled low carbon wire rod (112) may be initially passed through the first roller (105), where 180 degrees of the outer surface may contact the first roller (105) (thus, the groove (115) of the first roller (105)) and may undergo bending, thus inducing strain. Further, the hot rolled low carbon wire rod (112) is guided towards the second roller (106) from the first roller (105), where remaining 180 degrees of the outer surface may contact the second roller (106) [i.e., the groove (115) of the second roller (106)] and may undergo bending and thereby inducing strain. Thus, the hot rolled low carbon wire rod (112) may undergo uniform bending and thereby inducing strain (i.e., elongation) throughout its outer surface due to 360 degree contact of its outer surface with the first roller (105) and the second roller (106). This may result in stretching of the oxide layers, due to breakdown of the oxide layer, which may lead to removing of the oxide layers. Further, the hot rolled low carbon wire rod (112) may be guided towards the third roller (107) from the second roller (106), where the portion of the outer surface (i.e., 180 degrees of the outer surface) which contacts the first roller (105) may again contact the third roller (107) and may be subjected to bending, thereby inducing strain. The hot rolled low carbon wire rod (112) exiting from the third roller (107) may be guided towards the fourth roller (108), where the portion of the outer surface (i.e., 180 degrees of the outer surface) which contacts the second roller (106) may again contact the fourth roller (108) and may be subjected to bending, thereby inducing strain.
In an embodiment, subjecting the hot rolled low carbon wire rod (112) to bending for the second time may aid in effectively removing the oxides on the hot rolled low carbon wire rod (112).
EQUIVALENTS

With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.

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 (200) 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 (200) 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."

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.

Referral Numerals:

Referral Numerals Description
100 Device
101 First base frame
102 Second base frame
103 Third base frame
104 Fourth base frame
105 First roller
106 Second roller
107 Third roller
108 Fourth roller
109 Contact portion
112 Wire rod
113 Vertical member
114 Base frame
115 Groove
200 System
201 Wire rod pay-off unit