Claims:We claim:
1. A guide assembly (100) for controlling conveyance and twisting a rolling stock (1) from one rolling pass (3) to another rolling pass (4), the guide assembly (100) comprising:
two plates (8, 9) positioned diametrically opposite positions with respect to a longitudinal axis (11) of the rolling stock (1) to allow a passage of the rolling stock (1), where planes (8a, 8b) lie along with the two plates (8, 9) intersects each other at a point (10) on the longitudinal axis (11), the two plates (8, 9) define an entry (8b, 9b) to receive the rolling stock (1) and an exit (8c, 9c) to allow the passage of twisted rolling stock (1), the two plates (8, 9) define:
a lateral distance (L1) (12) between the two plates (8, 9) at the entry (8b, 9b) that is less than a lateral distance (D1) of the rolling stock (1); and
a lateral distance (L2) (13) between the two plates (8, 9) at the exit (8c, 9c) that matches with a lateral distance (D2) of the rolling stock (1), where opposite faces of the rolling stock (1) are parallel to the two plates (8, 9) at the exit (8c, 9c).
2. The guide assembly (100) as claimed in claim 1, wherein the entry (8b, 9b) of the two plates (8, 9) receives the rolling stock (1) at angle (?1) is in range of 400 to 550, preferably 450, with respect to a horizontal axis (11).
3. The guide assembly (100) as claimed in claim 1, wherein the exit (8c, 9c) of the two plates (8, 9) to allow passage of the twisted rolling stock (1), the rolling stock (1) is twisted by angle (?2) is in range of 700 to 850, preferably 750, with respect to the horizontal axis (11).
4. The guide assembly (100) as claimed in claim 1, wherein the two plates (8, 9) provide torque along complete longitudinal length to twist the rolling stock (1).
5. The guide assembly (100) as claimed in claim 1, wherein the lateral distance L1 (12) is greater than the lateral distance L2 (13).

6. The guide assembly (100) as claimed in claim 1, wherein the two plates (8, 9) are provided with wear resistant material.
7. The guide assembly (100) as claimed in claim 1, wherein rolling stock (1) is rotated in an anti-clockwise direction radially.
8. A guide assembly (200) for controlling conveyance and twisting a rolling stock (1) from one rolling pass (3) to another rolling pass (4), the guide assembly (200) comprising:
two force bearing members (15) positioned diametrically opposite positions with respect to a longitudinal axis (11) of the rolling stock (1) to allow passage of the rolling stock to define a wedge shaped profile;
a plate (14) attached to an inner surface of each of the two force bearing members (15) with a plurality of fasteners (16);
a variable thickness material (17) provided in between the inner surface of each of the two force bearing members (15) and the plate (14) to vary lateral distance (L4) between the plates (14) attached to an inner surface of each of the two force bearing members (15).

9. The guide assembly (200) as claimed in claim 8, wherein the guide assembly (200) provides variable lateral distance (L4) to provide different twist angles.

10. The guide assembly (200) as claimed in claim 1, wherein the pair of plate (14) is provided with wear resistant material.
, Description:GUIDE ASSEMBLY FOR CONTROLLING TWISTING OF A ROLLING STOCK
FIELD OF INVENTION:
[001] The present subject matter described herein, relates to a guide assembly for controlling conveyance and twisting a rolling stock, i.e., ferrous and non-ferrous long products, from one rolling pass to another rolling pass. More particular, to a set of guides for longitudinal conveyance and axial twisting of rollable long stock material towards subsequent rolling process.
BACKGROUND AND PRIOR ART AND PROBLEM IN PRIOR ART:
[002] In general, an existing guide for rolling products like wires, rods and concrete reinforcement bars, hereafter referred to as long products, are carried out by a sequence of rolling passes where the starting stock material, hereafter referred to as a billet, is subjected to higher amounts of elongation and consequent reduction of transverse dimensions. A set of discrete rolling operations is carried out till the final transverse dimensions of the long products or the desired material properties are achieved.
[003] In the existing guide for conveyance of the billet from one rolling pass to another rolling pass is of critical importance as there exists no buffer between two passes such that a speed of the rolling stock exiting one particular rolling pass, and the speed at which it enters the subsequent pass must be matched perfectly. Any mismatch of results in an operational disruption such that the disruption operations are happened when the material exits from the one pass at a higher speed than the another pass, in which this leads to a pileup of material in the inter-pass region.
[004] In order to prevent such occurrences of the rolling stock material, guides is utilized to ensure smooth conveyance in this region, where the guides conforms to the exterior profile of the stock material it conveys, and tight tolerances are required to be maintained both in the profile of the guides and its spatial orientation and position.
[005] Technical problem: the guides are designed to impart and maintain changes in angular orientation of the stock material, hereafter referred to as twist angle, in the inter-pass region. Dimensions and position of the guides ensure proper twist angle is to be achieved. The stock material when being radially asymmetric, subjects the guides to uneven frictional forces along a mating surface between the guide profile and the stock material such that this leads to uneven wear within the guide profile thereby preventing the latter from carrying out its intended function.
[006] This problem also is exacerbated when they are also designed to impart twist, since reaction forces developed across the mating surface must generate the torque to achieve the desired twist. These reaction forces lead to further wear in the guides. This uneven wear often manifest as a form of grooving along the guide internal profile, where the stock and guide make contact and/or generate higher friction.
[007] There is need in the art to provide a guide that can reduce wear in a first guide and increases life of the first guide. The present guide provide conveyance in twisting of rolling stock to improve life of the first guide.
[008] OBJECTS OF THE INVENTION:
[009] It is therefore the object of the invention to overcome the aforementioned and other drawbacks in prior device/system/apparatus.
[0010] The principal objective of the present invention is to provide a guide assembly for controlling conveyance and twisting a rolling stock from one rolling pass to another rolling pass.
[0011] Another object of the present invention is to provide higher service life of guide due to higher resistance to wear and positional stability.
[0012] Another object of the present invention is to reduce the amount of wear within the guide profile.
[0013] Yet another object of the present invention is to reduce the normal reaction pressure in the mating surfaces between the moving rolling stock and the guide inner surface.
[0014] These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following detailed description taken into consideration with accompanying drawings in which preferred embodiments of the present subject matter are illustrated.
SUMMARY OF THE INVENTION:
[0015] One or more drawbacks of conventional guide assembly for twisting a rolling stock from one rolling pass to second rolling pass are overcome, and additional advantages are provided through the guide assembly 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 a part of the claimed disclosure.
[0016] The present subject matter relates to a guide assembly for controlling conveyance and twisting a rolling stock from one rolling pass to another rolling pass. The guide assembly comprises two plates positioned diametrically opposite positions with respect to a longitudinal axis of the rolling stock to allow passage of the rolling stock, where a pair of planes lie along with the two plates intersects with each other at a point on the longitudinal axis. The two plates define entry to receive the rolling stock and exit to allow the passage of twisted rolling stock, where a lateral distance ‘L1’ between the two plates at the entry is less than lateral distance ‘D1’ of the rolling stock, and a lateral distance ‘L2’ between the two plates at the exit matches with a lateral distance ‘D2’ of the rolling stock.
[0017] In an embodiment of the present subject matter, the entry of the two plates receives the rolling stock at angle is in range of 400 to 500, preferably 450, with respect to a horizontal axis, and the exit of the two plates to allow passage of the twisted rolling stock at angle is in range of 700 to 800, preferably 750, with respect to the horizontal axis, where the rolling stock is rotated in an anti-clockwise direction radially.
[0018] In another embodiment of the present subject matter, the guide assembly has two force bearing members positioned diametrically opposite positions with respect to a longitudinal axis of the rolling stock to allow passage of the rolling stock to define a wedge shaped profile, and a pair of plates attached to an inner surface of each of the two force bearing members with a plurality of fasteners.
[0019] In yet another embodiment of the present subject matter, a variable thickness material is provided in between the inner surface and the plates on the two force bearing members to vary lateral distance ‘L4’ between the plates, wherein the guide assembly provides the variable lateral distance ‘L4’ to provide different twist angles.
[0020] 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.
[0021] 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 DRAWINGS
[0022] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods or structure in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0023] Fig. 1a, 1b and 2 illustrate structure of guides for longitudinal conveyance and axial twisting of rollable long stock material, in accordance with an embodiment of the present subject matter; and
[0024] Fig. 3 illustrates another embodiment of a guide assembly as illustrated in figure 1, in accordance with an embodiment of the present subject matter.
[0025] 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.
DESCRIPTION OF THE PREFERRED EMBODIMENTS:
[0026] 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.
[0027] 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.
[0028] 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 tennis “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.
[0029] 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.
[0030] 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.
[0031] These and other advantages of the present subject matter would be described in greater detail with reference to the following figures. It should be noted that the description merely illustrates the principles of the present subject matter. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described herein, embody the principles of the present subject matter and are included within its scope.
[0032] The present subject matter describes structure of guide assembly that can be positioned in between two rolling passes. The present guide assembly can be referred as inter-pass guide assembly to provide conveyance and axial twisting to the rolling stock. Earlier complete twisting of the rolling stock has to be done by single guide that is provided in the rolling pass. The present guide assembly act as secondary guide to receive twisted rolling stock from first guide to do further twisting. In the present subject matter, portion of the load from the first guide is transferred to second guide to reduce wear in the first guide and to improve life of the first guide.
[0033] Fig. 1a and 1b illustrate structure of guide for longitudinal conveyance and axial twisting of rollable long stock material, in accordance with an embodiment of the present subject matter. The guide assembly 100 is provided in between two rolling passes for longitudinal conveyance and axial twisting of a rolling stock coming from first rolling pass. The guide assembly 100 includes two plates 8, 9 positioned diametrically opposite positions with respect to a longitudinal axis 11 of the rolling stock 1. Each plate from the two plates 8,9 define planes 8a, 8b, respectively that intersects each other at a point 10 on a longitudinal axis 11. Therefore, the two plates 8, 9 are not parallel to each other. The two plates 8, 9 define an entry 8b, 9b to receive a rhomboidal cross section of the rolling stock 1 and an exit 8c, 9c to allow the passage of twisted rolling stock 1.
[0034] As shown in the fig.1a, the direction of motion of the rolling stock is indicated by arrow 2. Further, markers denote the exit of the rolling stock 1 from the previous rolling stand 3 and the entry in the next rolling stand 4. The total distance between the two rolling stands 3,4 is the distance ‘L’ 5. In the distance 5 the rolling stock 1 is rotated in an anticlockwise direction radially by an angle of ‘?3’ 7. Referring to fig. 1b, the two rigid vertical plates 8,9 are located along the length of the rolling stock 1 that constitute the principal load bearing elements of the guide assembly 100. These are positioned such that the planes 8a, 8b along which the plates 8, 9 lie and intersect along a line 10 which passes through the longitudinal axis 11 of the rolling stock.
[0035] The plates 8,9 are positioned such that that lateral distance between them at any point along its horizontal length is same as the maximum lateral distance of the rolling stock 1 measured in the same direction. Due to the twisting experienced by the rolling stock 1 the angular orientation of the major and minor axis of the rolling stock 1 keeps changing along the length L (5). As shown in the fig. 1a and fig. 1b, at the entry 8b, 9b of the two plates 8, 9 a lateral distance (L1) 12 and twist angle ‘?1’ is defined where the lateral distance (L1) 12 is less than lateral distance D1 of the rolling stock 1. In other words, lateral distance of the rolling stock 1 just after the first guide is equal to the lateral distance (L1) 12 of the plates 8,9. At the exit 8c, 9c of the two plates 8,9, a lateral distance (L2) 13 is defined in between the two plates 8, 9 that matches with smallest lateral distance D2 of the rolling stock 1 after twisting where opposite faces of the rolling stock 1 are parallel to the exit 8c, 9c of the two plates 8, 9.
[0036] Accordingly, the angularity of the two plates 8, 9 is to ensure reflection symmetry along the longitudinal axis 11 of the rolling stock 1 such that the entry 8b, 9b of the two plates 8, 9 receives the rolling stock 1 at angle ‘?1’ that is in range of 400 to 550, preferably 450, with respect to a horizontal axis 11, and the exit 8c, 9c of the two plates 8, 9 to allow the passage of twisted rolling stock 1, where the rolling stock 1 is twisted by angle ‘?2’ that is in range of 700 to 850, preferably 750, with respect to the horizontal axis 11.
[0037] Further the distance (L) 5 in between the first rolling stand 3 and the second rolling stand 5 is allow anti-clockwise direction rotation of the rolling stock 1 by the angle of (?3) 7 that is 90o.
[0038] In practice, normal reactions are generated along the line of contact of surface of contact between the rolling stock 1 and the plates 8, 9. The normal reaction between the rolling stock 1 and the plates 8, 9 generates required torque that helps in achieving the specified twist angle. Since the contact line extends through the entire longitudinal length of the plates 8, 9, the force gets distributed over the length of the guide assembly 100 therefore reducing the amount of wear experienced by the plates 8, 9. Further, proper position of the guide assembly 100 along the length (L) 5 play an important role in twisting. Accordingly, a longer guide assembly 100 provides more wear resistance, such that the length (L) 5 of guide is limited by the non-linearity of the rolling stock 1. The length of the guide assembly 100 is selected such that along its length any non-linearity in the lateral dimension of the rolling stock may be neglected.
[0039] Practically, the guide assembly 100 provides superior performance when it extend between points along the distance (L) 5, when the twist angles in between 40 degrees and 80 degrees. Referring Fig. 2, the length of the guide assembly 100 is extended till such point (14) where the opposite faces of the rolling stock 1 becomes parallel to the plates 8,9. This produced a surface contact instead of a line contact and leads to drastic reduction in wear.
[0040] Referring to fig.3, a guide assembly 200 for controlling conveyance and twisting of a rolling stock 1 from one rolling pass 3 to another rolling pass 4 is described. The guide assembly 200 comprises two force bearing members 15 positioned diametrically opposite positions with respect to a longitudinal axis 11 (not shown in figure) of the rolling stock 1 (not shown in figure 3) to allow passage of the rolling stock 1. Further, the force bearing members 15 are positioned to define a wedge shaped profile where entry define big lateral distance between the force bearing members 15 as compared to exit. Further, the guide assembly 200 comprises a plate 14 attached to an inner surface of each of the two force bearing members 15 with a plurality of fasteners 16. Furthermore, a variable thickness material 17 is provided in between the inner surface of each of the two force bearing members 15 and the plate 14 to vary lateral distance ‘L4’ between the plates 14. The variable thickness material 17 allows change of the angle subtended in between the plates 14. The variable thickness material 17 provide control to change twist angle using the same guide assembly 200 in rolling material of different cross-sectional shape and dimensions and with different twist angles.
[0041] Referring figure 3, illustrates a structure of guide assembly, in accordance with an embodiment of the present subject matter. The pair of plates 14 is attached to the guides such that the pair of plates 14 is provided with wear resistant material and provides a mating surface between the rolling stock 1 and the guides.
[0042] 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.”
[0043] It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present invention contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. In addition, while a feature of the present invention may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present invention. The present invention also encompasses intermediate and end products resulting from the practice of the methods herein. The use of “comprising” or “including” also contemplates embodiments that “consist essentially of” or “consist of” the recited feature.
[0044] Although embodiments for the present subject matter have been described in language specific to structural features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/component of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the scope of the present subject matter.