EP2747911B1 - Wire-rod and the like hot-rolling machine - Google Patents
Wire-rod and the like hot-rolling machine Download PDFInfo
- Publication number
- EP2747911B1 EP2747911B1 EP12784720.0A EP12784720A EP2747911B1 EP 2747911 B1 EP2747911 B1 EP 2747911B1 EP 12784720 A EP12784720 A EP 12784720A EP 2747911 B1 EP2747911 B1 EP 2747911B1
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- EP
- European Patent Office
- Prior art keywords
- rolling
- wire
- mills
- hot
- rod
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
- B21B13/10—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
- B21B13/103—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane for rolling bars, rods or wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/005—Cantilevered roll stands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
- B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills
Definitions
- the present invention relates to a.wire-rods and the like hot-rolling machine.
- a wire-rod hot-rolling machine according to the preamble of claim 1 is known from EP-A 1 262 248 .
- the present invention relates to a machine for producing hot-rolled rods for reinforced concrete. Use to which the following description will explicitly refer without this implying any loss of generality.
- reinforced concrete rods are obtained by subjecting a steel wire rod with an approximately circular section to a hot-rolling process which gradually reduces the nominal section of the wire rod.
- the hot-rolling lines which are used to carry out this particular metallurgical process usually consist of a suitable number of roller-provided rolling units, which are arranged in sequence one after the other along the feeding path of the wire rod, so that each roller-provided rolling unit can slightly reduce the nominal section of the high-temperature steel wire rod while it is fed along the rolling line.
- each roller-provided rolling unit of the hot-rolling line is a completely separate machine, independent from the others, and usually consists of a rolling mill stand, which is provided with two opposite, counter-rotating rolling mills which are arranged one beside the other, locally substantially parallel and tangent to each other, so as to form/define a groove or neck therebetween, through which the wire rod to be hot-rolled is forced; and of an electric motor which is mechanically coupled to both rolling mills by means of a big reduction gearbox, so as to rotate the two rolling mills about respective longitudinal reference axes.
- the distance between the rotating axes of the two rolling mills gradually decreases along the feeding path of the wire rod, so that each pair of rolling mills can deform and stretch the wire rod thus slightly reducing the nominal section thereof.
- the wire rod For optimal rolling of the wire rod, the wire rod must be squeezed/deformed along a necking directrix which, while remaining on a reference plane orthogonal to the feeding direction of the wire rod, varies its angular orientation with respect to the body of the wire rod as the wire rod moves forward along the rolling line, whereby the rotation axes of the rolling mills of the various rolling units are usually arranged alternatively in horizontal and vertical position (or in all cases turned by 90°) so as to squeeze/deform the wire rod along alternatively orthogonal necking directrixes.
- This constructional trick may also be used when the hot-rolling line is structured to hot-roll in parallel, i.e. at the same time, two wire rods that move forward in the line one beside the other.
- the two rolling mills of each roller-provided rolling unit being they arranged with the rotation axes in vertical or horizontal position, are shaped/structured so as to form/define two separate rolling grooves or throttling therebetween, each of which is adapted to be engaged by a respective wire rod to be hot-rolled, and at least one of the two wire rods is fed in the hot-rolling line following an helical path which allows the wire rod to engage, in sequence, one of the two rolling grooves or throttling of each pair of rolling mills.
- hot-rolling plan for reinforced-concrete rods have thought to increase the hourly production rate of their plant by making hot-rolling lines in which the wire rod which is fed to the rolling line inlet, is longitudinally cut/split to obtain two wire rods of smaller section, which then continue along two separate, distinct branches of the rolling line, each of which consists of a series of roller-provided rolling units operating as independent, single-rod rolling lines.
- the hourly production rate of the hot-rolling line can be doubled while keeping the wire rod speed in the range of about 100-120 meters per second, threshold above which the hot-rolling procedure becomes technically impractical.
- the longitudinal splitting of the wire rod, with consequent bifurcation of the hot-rolling line may be repeated several times to considerably increase the hourly production rate of the hot-rolling line.
- Aim of the present invention is to realize roller-provided rolling units which are free from the above-mentioned problems, and which are able to minimize the space increase deriving from bifurcating a hot-rolling line.
- reference numeral 1 indicates as a whole a machine for the hot-rolling in parallel and at high temperature of two metal wire rods b or similar semi-finished products, which machine is particularly advantageously used for producing rods for reinforced concrete.
- machine 1 is structured to hot-roll in parallel two metal wire rods b which are fed in the machine one beside the other, following respective feeding paths p which are locally substantially rectilinear and parallel to each other.
- the feeding paths p of the two wire rods b lie on the same lying plane G, and are arranged at a predetermined distance d from each other preferably, though not necessarily, ranging from 0.3 to 3 meters.
- the feeding paths p of the two wire rods b preferably, though not necessarily, develops in horizontal direction, while the lying plane G is inclined with respect to the vertical by an angle ⁇ preferably ranging from 30° to 60°, and preferably, though not necessarily, equal to about 45°.
- Machine 1 essentially consists of a series of roller-provided rolling units or mill stands 2 which are arranged in sequence one after the other, aligned along the feeding paths p of both wire rods b, so that each roller-provided rolling unit 2 may plastically deform both high-temperature metal wire rods b that move forward each along a corresponding feeding path p, thus slightly reducing their nominal section.
- each rolling mill stand or unit 2 comprises two rolling-mills assemblies 3 which are arranged one beside the other, substantially coplanar to the same reference plane T locally substantially perpendicular to the feeding paths p of the two wire rods b (i.e. perpendicular to the longitudinal axis of the wire rod b and to the feeding direction of the wire rod), and are oriented on the reference plane T so that each rolling-mills assembly 3 is positioned on the feeding path p of a respective wire rod b.
- each rolling-mills assembly 3 is provided with a pair of reciprocally opposite, counter-rotating rolling mills 4, which are substantially circular, and are fixed in axially rotating manner to a rigid supporting structure one beside the other, so that their respective rotation axes R are locally substantially parallel to each other; and with a cascade of gears, which is structured so as to simultaneously drive into rotation the two rolling mills 4 about the respective rotation axes R at a substantially equal peripheral speed.
- the two rolling mills 4 are dimensioned so as to be locally substantially tangent to one another, while the peripheral surfaces of the two rolling mills 4 are profiled/structured so as to form/define a rolling groove or throttling 4a therebetween, through which the wire rod to be hot-rolled is forced.
- the wire-rods and the like hot-rolling machine 1 furthermore comprises at least one drive unit 5 preferably, though not necessarily, of electric or hydraulic type, which is structured so as to be mechanically connected to the cascade of gears of least one of the two rolling-mills assemblies 3 of at least one of the rolling units 2, so as to simultaneously rotate the two rolling mills 4 of the aforesaid rolling-mills assembly 3.
- at least one drive unit 5 preferably, though not necessarily, of electric or hydraulic type, which is structured so as to be mechanically connected to the cascade of gears of least one of the two rolling-mills assemblies 3 of at least one of the rolling units 2, so as to simultaneously rotate the two rolling mills 4 of the aforesaid rolling-mills assembly 3.
- the wire-rods and the like hot-rolling machine 1 is preferably provided with a single drive unit 5, which is structured to be mechanically connected to the gear cascades of both rolling-mills assemblies 3 of each rolling unit 2, in order to simultaneously drive into rotation the rolling mills 4 of all the roller-provided rolling units 2.
- the cascades of gears of the two rolling-mills assemblies 3 of each rolling unit 2 are preferably, though not necessarily, connected in cascade to the gear cascades of the two rolling-mills assemblies 3 of the immediately adjacent rolling units 2, and the drive unit 5 is structured so as to be mechanically connected to the gear cascades of the two rolling-mills assemblies 3 of a single rolling unit 2.
- each of the two rolling-mills assemblies 3 of the same rolling unit 2 is further arranged on the reference plane T of the rolling unit 2, so that the rotation axes R of its rolling mills 4 lie on an plane substantially locally coinciding with, or however substantially parallel to, the reference plane T of the rolling unit 2 (the reference plane T is parallel to the sheet plane in Figure 3 ), and so that the rolling groove or throttling 4a thereof is arranged on the lying plane G of the feeding paths p of the wire rods, along the feeding path p of a respective wire rod b.
- the two rolling-mills assemblies 3 are further arranged on the reference plane T of the rolling unit 2, so that the rotation axes R of the rolling mills 4 of the first rolling-mills assembly 3 are locally substantially parallel and preferably also coplanar to the rotation axes R of the rolling mills 4 of the second rolling-mills assembly 3, while intersecting the lying plane G of the feeding paths p of the two wire rods b with an inclination angle ⁇ greater than 5° and smaller than 85°.
- each rolling-mills assembly 3 is provided with a longitudinal reference axis L which lies on or is however parallel to the reference plane T of the rolling unit 2, and intersects the lying plane G of the feeding paths p of the wire rods with an inclination angle ⁇ greater than 5° and smaller than 85°; and the rotation axes R of the two rolling mills 4 are arranged parallel and coplanar to the longitudinal axis L of the rolling assembly, in specular position on the opposite sides of the same longitudinal axis L.
- the rolling groove or throttling 4a of the rolling-mills assembly 3 is instead positioned exactly on the longitudinal axis L of the rolling-mills assembly 3.
- the two rolling-mills assemblies 3 of the same rolling unit 2 are preferably oriented so that the respective reference longitudinal axes L, and therefore the rotation axes R of the respective rolling mills 4, either lie on or are however parallel to the reference plane T, are locally parallel to each other and are finally inclined with the respect to the lying plane G by an angle ⁇ preferably, though not necessarily, equal to 45°, and in all cases preferably ranging from 30° to 60°.
- the wire-rods or the like hot-rolling machine 1 is preferably, though not necessarily, provided with a horizontal, supporting crossbar 7 which extends under the lying plane G of the wire-rods feeding paths p, in a direction locally substantially parallel to the wire-rods feeding paths p, and the rolling-mills assemblies 3 which form the various rolling units 2 are fixed onto the supporting crossbar 7 in pairs one beside the other with the longitudinal reference axes L alternatively in horizontal and vertical position, so as to intersect the lying plane G of the wire-rods feeding paths p with an inclination angle ⁇ ranging from 30° to 60° and preferably, though not necessarily, equal to 45°.
- the second rolling-mills assembly 3 of a rolling unit 2 is arranged by the side of the first rolling-mills assembly 3 of the same rolling unit 2, but is moved/ shifted either forwards or backwards with respect to the first rolling-mills assembly 3 in a direction locally substantially parallel to the longitudinal reference axes L of the two rolling-mills assemblies 3 (and thus also parallel to the rotation axes R of the rolling mills 4), by a length l in order to arrange the rolling grooves or throttling 4a of both rolling-mills assemblies 3 on the lying plane G of the feeding paths p of the two wire rods b, each at the feeding path p of a respective wire rod b to be hot-rolled.
- each rolling unit 2 the two rolling-mills assemblies 3 of each rolling unit 2 are fixed to the supporting crossbar 7 one beside the other, so that the two rolling mills 4 of the second rolling-mills assembly 3 are moved/shifted either forwards or backwards with respect to the two rolling mills 4 of the first rolling-mills assembly 3 by a length l in order to arrange the rolling grooves or throttling 4a of both rolling-mills assemblies 3 on the lying plane G of the feeding paths p of the wire rods, each at the feeding path p of a respective wire rod b to be hot-rolled.
- each rolling unit 2 the two rolling-mills assemblies 3 of each rolling unit 2 are fixed to the supporting crossbar 7 one beside the other, so that the rotation axes R of the rolling mills 4 are inclined with respect to the lying plane G of the feeding paths p of the wire rods by an angle ⁇ preferably of about 45°.
- the two rolling-mills assemblies 3 of a rolling unit 2 are additionally located on the reference plane T of their rolling unit 2 in a specular position and offset with respect to the two rolling-mills assemblies 3 of the immediately adjacent rolling unit(s) 2, so as to arrange the corresponding longitudinal reference axes L according to a substantially W-shaped, crossed arrangement in which the vertexes of the two Vs are each arranged at the feeding path p of a respective wire rod b to be hot-rolled.
- the two rolling-mills assemblies 3 which belong to two adjacent rolling units 2 and which intersect the same wire-rod feeding path p the one after the other, are arranged on the corresponding reference planes T with the longitudinal axes L arranged in a specular position and reciprocally offset to one another, so as to cross each other at the feeding path p of the wire rod, i.e. so as to form a V whose vertex is located on the feeding path p of the wire rod.
- the rolling-mills assemblies 3 forming the various rolling mill stands or units 2 preferably, though not necessarily, consist of a series of elementary sectional modules 10 with a mutually equivalent structure, each of which comprises: a preferably substantially parallelepiped-shaped, rigid box-like casing 11 which is arranged on the reference plane T of the rolling unit 2 so that the longitudinal axis thereof coincides with the longitudinal reference axis L of the rolling-mills assembly 3, and so that the upper end 11a thereof directly faces the lying plane G of the feeding paths P of the wire rods; and a pair of rotating supporting shafts 12 which are inserted in axially rotating manner into the upper end 11a of the rigid box-like casing 11 one beside the other, and which cantileverly jut out from the same upper end 11a of the casing towards the lying plane G while remaining coaxial to respective rotation axes R' locally parallel to each other and to the longitudinal axis L of the rigid box-like casing
- the two supporting shafts 12 are furthermore inserted into the rigid box-like casing 11 so that the lying plane of the two rotation axes R' substantially coincides with, or is however parallel to, the reference plane T of the rolling unit 2, and that the rotation axis R' of each supporting shaft 12 intersects the lying plane G of the two feeding paths p of the wire rods with an inclination angle equal to the inclination angle ⁇ of the rotation axes of the rolling mills 4 with respect to the same lying plane G.
- each supporting shaft 12 of the elementary sectional module 10 is preferably, though not necessarily, fitted in an axially rotating manner into a respective intermediate supporting bushing or bush 13 which is provided with a longitudinal, eccentric pass-through hole 13a, and is in turn inserted in an axially rotating manner into the body of the rigid box-like casing 11, so as to freely rotate about a reference axis locally parallel to the longitudinal axis L of the rigid box-like casing 11 and at same time offset with respect to the rotation axis R' of the supporting shaft 12.
- the elementary sectional module 10 is furthermore provided with a bushing moving mechanism (not shown), which is structured so as to vary, on command, the angular position of both supporting bushings or bushes 13 in a synchronized manner, so as to vary/adjust the distance between the rotation axes R' of the two supporting shafts 12.
- a bushing moving mechanism (not shown), which is structured so as to vary, on command, the angular position of both supporting bushings or bushes 13 in a synchronized manner, so as to vary/adjust the distance between the rotation axes R' of the two supporting shafts 12.
- each elementary sectional module 10 furthermore comprises a driving shaft 14 which extends coaxially to a reference axis A locally perpendicular to the longitudinal axis L of the rigid box-like casing 11 and to the lying plane of the supporting shafts 12, and is inserted in a pass-through and axially rotating manner through the rigid box-like casing 11, next to the lower end 7b of the same casing; and a series of toothed wheels and idle shafts 15, which are located within the rigid box-like casing 11, and are structured so at to transmit the rotary motion of the driving shaft 14 to the two supporting shafts 12 with a predetermined angular speed reduction/increase coefficient.
- the reduction ratio of the gear cascade 15 which connects the driving shaft 14 to the two supporting shafts 12 varies according to the position of the rolling unit 3 along the rolling line.
- the various elementary sectional modules 10 are preferably fixed to the supporting crossbar 7 aligned one after the other so as to form four rows parallel to the feeding paths p of the wire rods, so to align the driving shafts 14 along four reference lines parallel to one another and to the two feeding paths p of the wire rods.
- This configuration allows to mechanically connect the driving shafts 14 of the various elementary sectional modules 10 in cascade to one another, preferably by means of simple joint sleeves (not shown).
- the drive unit 5 is instead preferably arranged at the end of the supporting crossbar 7, so as to be aligned with the four rows of driving shafts 14, and preferably, though not necessarily, consists of a high-power, electric motor 16 and of a big reduction gearbox 17 which connects the drive shaft of the electric motor 16 to the distal end of the four feeding shafts 14 of the first rolling unit 2 of the supporting crossbar 7, i.e. the rolling unit 2 closer to drive unit 5.
- the wire-rods and the like hot-rolling machine 1 is able to hot-roll two or more wire rods b in parallel by feeding the wire rods b along respective feeding paths p which are locally perfectly rectilinear and parallel to one another.
- This geometry allows to take the feeding speed of each wire rod b to the maximum value currently allowed for hot-rolling processes, i.e. up to about 100-120 meters per second.
- the particular space arrangement of the rolling-mills assemblies 3 forming the various rolling mill stands or units 2 further allows the rolling mill stands 2 to be connected in cascade to one another, so as to use a single drive unit 5 to simultaneously drive into rotation the rolling mills 4 of all the rolling units 2, thus significantly reducing the overall dimensions of the machine.
- each rolling unit 2 consists of two completely separate and independent rolling-mills assemblies 3, the transportation on site and the subsequent assembly of the wire-rods and the like hot-rolling machine 1 is greatly facilitated.
- each rolling unit 2 consists only of to elementary sectional modules 10 which are substantially identical in structure, the design of the whole wire-rods and the like hot-rolling machine 1 and the construction of single component parts are greatly simplified.
- the wire-rods and the like hot-rolling machine 1 may be structured so as to hot-roll three or more metal wire rods b in parallel, which are fed one beside the other following respective feeding paths p which are locally substantially rectilinear, parallel and equally spaced apart, all lying on the same lying plane G which is preferably, though not necessarily horizontal.
- each rolling mill stand or unit 2 of machine 1 may consist of three or more (three in the example shown) rolling-mills assemblies 3 preferably, though not necessarily, substantially identical to one another, which are arranged on the reference plane T of the roller-provided rolling unit 2 so to be parallel to and adjacent to the other, so as to place the respective rolling grooves or throttling 4a on the lying plane G of the wire-rods feeding paths p, each at the feeding path p of a respective wire rod b, and so that the rotation axes R of the rolling mills 4 are locally substantially parallel to one another and to the reference plane T of the roller-provided rolling unit 3, while intersecting the lying plane G of the wire-rods feeding paths p with an inclination ⁇ preferably, though not necessarily, equal to 45°, and in any case preferably ranging from 30° to 60°.
- the three or more rolling-mills assemblies 3 are furthermore preferably arranged on the reference plane T of the rolling unit 2 so that the rotation axes R of the rolling mills 4 are also all locally substantially coplanar to one another.
- the three rolling-mills assemblies 3 are preferably positioned on the reference plane T of the roller-provided rolling unit 3 one against the other.
- the three or more rolling-mills assemblies 3 of a rolling unit 2 are located on the reference plane T of their rolling unit 2 in a specular position and offset with respect to the three or more rolling-mills assemblies 3 of the immediately adjacent rolling unit(s) 2, so as to arrange the longitudinal reference axes L according to a substantially W-shaped, crossed arrangement, in which the vertexes of the two Vs are each arranged at the feeding path p of a respective wire rod b to be hot-rolled.
- the two rolling-mills assemblies 3 which belong to two adjacent rolling units 2 and which intersect the same feeding path p of the wire rod one after the other, are positioned on corresponding reference planes T with the longitudinal axes L arranged in a symmetric position and reciprocally offset so as to cross each other along the feeding path of the wire rod p, i.e. so as to form a V, the vertex of which is on the feeding path p of the wire rod.
- the rolling-mills assemblies 3 may consist of a series of elementary sectional modules 10 which are preferably fixed to the supporting crossbar 7 and aligned one after the other so as to form a double number of rows of elementary section modules 10 as compared to the number of feeding paths p of the wire rods.
Description
- The present invention relates to a.wire-rods and the like hot-rolling machine. A wire-rod hot-rolling machine according to the preamble of
claim 1 is known fromEP- .A 1 262 248 - More in detail, the present invention relates to a machine for producing hot-rolled rods for reinforced concrete. Use to which the following description will explicitly refer without this implying any loss of generality.
- As known, reinforced concrete rods are obtained by subjecting a steel wire rod with an approximately circular section to a hot-rolling process which gradually reduces the nominal section of the wire rod.
- The hot-rolling lines which are used to carry out this particular metallurgical process usually consist of a suitable number of roller-provided rolling units, which are arranged in sequence one after the other along the feeding path of the wire rod, so that each roller-provided rolling unit can slightly reduce the nominal section of the high-temperature steel wire rod while it is fed along the rolling line.
- At present, each roller-provided rolling unit of the hot-rolling line is a completely separate machine, independent from the others, and usually consists of a rolling mill stand, which is provided with two opposite, counter-rotating rolling mills which are arranged one beside the other, locally substantially parallel and tangent to each other, so as to form/define a groove or neck therebetween, through which the wire rod to be hot-rolled is forced; and of an electric motor which is mechanically coupled to both rolling mills by means of a big reduction gearbox, so as to rotate the two rolling mills about respective longitudinal reference axes.
- Obviously, the distance between the rotating axes of the two rolling mills gradually decreases along the feeding path of the wire rod, so that each pair of rolling mills can deform and stretch the wire rod thus slightly reducing the nominal section thereof.
- For optimal rolling of the wire rod, the wire rod must be squeezed/deformed along a necking directrix which, while remaining on a reference plane orthogonal to the feeding direction of the wire rod, varies its angular orientation with respect to the body of the wire rod as the wire rod moves forward along the rolling line, whereby the rotation axes of the rolling mills of the various rolling units are usually arranged alternatively in horizontal and vertical position (or in all cases turned by 90°) so as to squeeze/deform the wire rod along alternatively orthogonal necking directrixes.
- This constructional trick may also be used when the hot-rolling line is structured to hot-roll in parallel, i.e. at the same time, two wire rods that move forward in the line one beside the other. In this case, the two rolling mills of each roller-provided rolling unit, being they arranged with the rotation axes in vertical or horizontal position, are shaped/structured so as to form/define two separate rolling grooves or throttling therebetween, each of which is adapted to be engaged by a respective wire rod to be hot-rolled, and at least one of the two wire rods is fed in the hot-rolling line following an helical path which allows the wire rod to engage, in sequence, one of the two rolling grooves or throttling of each pair of rolling mills.
- Unfortunately, this constructional trick cannot be used when the feeding speed of the wire rod is faster than 30-40 meters per second: experimental tests have indeed indicated that, if the feeding speed of the wire rod is greater than 30-40 meters per second, the wire rod which follows the helical path tends to jam in the hot-rolling line, thus halting the operation of the plant.
- Given the impossibility of rolling in parallel two wire rods which are fed at a speed greater than 30-40 meters per second, manufacturers of hot-rolling plan for reinforced-concrete rods have thought to increase the hourly production rate of their plant by making hot-rolling lines in which the wire rod which is fed to the rolling line inlet, is longitudinally cut/split to obtain two wire rods of smaller section, which then continue along two separate, distinct branches of the rolling line, each of which consists of a series of roller-provided rolling units operating as independent, single-rod rolling lines.
- Thank to this solution, the hourly production rate of the hot-rolling line can be doubled while keeping the wire rod speed in the range of about 100-120 meters per second, threshold above which the hot-rolling procedure becomes technically impractical.
- Obviously, the longitudinal splitting of the wire rod, with consequent bifurcation of the hot-rolling line, may be repeated several times to considerably increase the hourly production rate of the hot-rolling line.
- While ensuring a considerable increase of the hourly production rate, the tree-like structure of the hot-rolling line causes a considerable increase in the number of machines involved in rod production, resulting in higher running costs.
- Simply bifurcating the hot-rolling line, indeed practically results in doubling the number of roller-provided rolling units, with consequent doubling of the extension of the shed where the rolling line is housed, and of the amount of spare parts which must be kept readily available for routine and supplementary maintenance of the rolling line.
- Aim of the present invention is to realize roller-provided rolling units which are free from the above-mentioned problems, and which are able to minimize the space increase deriving from bifurcating a hot-rolling line.
- In compliance with these aims, according to the present invention there is provided a wire-rods and the like hot-rolling machine as specified in
claim 1 and preferably, though not necessarily, in any one of the dependent claims. - The present invention will now be described with reference to the accompanying drawings, which show a non-limitative embodiment thereof, in which:
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figure 1 is a perspective view of a wire-rods and the like hot-rolling machine for realized according to the teachings of the present invention, with parts removed for clarity; -
figure 2 is a plan view of the machine shown infigure 1 , with parts removed for clarity; -
figure 3 is a front view of the machine shown infigure 2 , with parts removed for clarity; -
figure 4 is a section view of some components of the machine shown infigure 3 , with parts removed for clarity; whereas -
figure 5 is a front view of a second embodiment of the wire-rods and the like hot-rolling machine shown in the figures above, again with parts in section and parts removed for clarity. - With reference to
figures 1 ,2 and3 ,reference numeral 1 indicates as a whole a machine for the hot-rolling in parallel and at high temperature of two metal wire rods b or similar semi-finished products, which machine is particularly advantageously used for producing rods for reinforced concrete. - More in detail,
machine 1 is structured to hot-roll in parallel two metal wire rods b which are fed in the machine one beside the other, following respective feeding paths p which are locally substantially rectilinear and parallel to each other. - In other words, the feeding paths p of the two wire rods b lie on the same lying plane G, and are arranged at a predetermined distance d from each other preferably, though not necessarily, ranging from 0.3 to 3 meters.
- In the example shown, in particular, the feeding paths p of the two wire rods b preferably, though not necessarily, develops in horizontal direction, while the lying plane G is inclined with respect to the vertical by an angle α preferably ranging from 30° to 60°, and preferably, though not necessarily, equal to about 45°.
-
Machine 1 essentially consists of a series of roller-provided rolling units or mill stands 2 which are arranged in sequence one after the other, aligned along the feeding paths p of both wire rods b, so that each roller-providedrolling unit 2 may plastically deform both high-temperature metal wire rods b that move forward each along a corresponding feeding path p, thus slightly reducing their nominal section. - With reference to
figures 1 ,2 and3 , each rolling mill stand orunit 2 comprises two rolling-mills assemblies 3 which are arranged one beside the other, substantially coplanar to the same reference plane T locally substantially perpendicular to the feeding paths p of the two wire rods b (i.e. perpendicular to the longitudinal axis of the wire rod b and to the feeding direction of the wire rod), and are oriented on the reference plane T so that each rolling-mills assembly 3 is positioned on the feeding path p of a respective wire rod b. - More in detail, each rolling-
mills assembly 3 is provided with a pair of reciprocally opposite,counter-rotating rolling mills 4, which are substantially circular, and are fixed in axially rotating manner to a rigid supporting structure one beside the other, so that their respective rotation axes R are locally substantially parallel to each other; and with a cascade of gears, which is structured so as to simultaneously drive into rotation the tworolling mills 4 about the respective rotation axes R at a substantially equal peripheral speed. Furthermore, the tworolling mills 4 are dimensioned so as to be locally substantially tangent to one another, while the peripheral surfaces of the tworolling mills 4 are profiled/structured so as to form/define a rolling groove or throttling 4a therebetween, through which the wire rod to be hot-rolled is forced. - With reference to
figure 1 , the wire-rods and the like hot-rollingmachine 1 furthermore comprises at least onedrive unit 5 preferably, though not necessarily, of electric or hydraulic type, which is structured so as to be mechanically connected to the cascade of gears of least one of the two rolling-mills assemblies 3 of at least one of therolling units 2, so as to simultaneously rotate the tworolling mills 4 of the aforesaid rolling-mills assembly 3. - In the example shown, in particular, the wire-rods and the like hot-rolling
machine 1 is preferably provided with asingle drive unit 5, which is structured to be mechanically connected to the gear cascades of both rolling-mills assemblies 3 of eachrolling unit 2, in order to simultaneously drive into rotation therolling mills 4 of all the roller-providedrolling units 2. - More in detail, in the example shown, the cascades of gears of the two rolling-mills assemblies 3 of each
rolling unit 2 are preferably, though not necessarily, connected in cascade to the gear cascades of the two rolling-mills assemblies 3 of the immediately adjacentrolling units 2, and thedrive unit 5 is structured so as to be mechanically connected to the gear cascades of the two rolling-mills assemblies 3 of a singlerolling unit 2. - With reference to
figures 2 and3 , each of the two rolling-mills assemblies 3 of the samerolling unit 2 is further arranged on the reference plane T of therolling unit 2, so that the rotation axes R of itsrolling mills 4 lie on an plane substantially locally coinciding with, or however substantially parallel to, the reference plane T of the rolling unit 2 (the reference plane T is parallel to the sheet plane inFigure 3 ), and so that the rolling groove orthrottling 4a thereof is arranged on the lying plane G of the feeding paths p of the wire rods, along the feeding path p of a respective wire rod b. - In addition to the above, the two rolling-
mills assemblies 3 are further arranged on the reference plane T of therolling unit 2, so that the rotation axes R of therolling mills 4 of the first rolling-mills assembly 3 are locally substantially parallel and preferably also coplanar to the rotation axes R of therolling mills 4 of the second rolling-mills assembly 3, while intersecting the lying plane G of the feeding paths p of the two wire rods b with an inclination angle β greater than 5° and smaller than 85°. - In other words, with particular reference to
figure 3 , each rolling-mills assembly 3 is provided with a longitudinal reference axis L which lies on or is however parallel to the reference plane T of therolling unit 2, and intersects the lying plane G of the feeding paths p of the wire rods with an inclination angle β greater than 5° and smaller than 85°; and the rotation axes R of the tworolling mills 4 are arranged parallel and coplanar to the longitudinal axis L of the rolling assembly, in specular position on the opposite sides of the same longitudinal axis L. The rolling groove or throttling 4a of the rolling-mills assembly 3 is instead positioned exactly on the longitudinal axis L of the rolling-mills assembly 3. - In the example shown, in particular, the two rolling-mills assemblies 3 of the same
rolling unit 2 are preferably oriented so that the respective reference longitudinal axes L, and therefore the rotation axes R of therespective rolling mills 4, either lie on or are however parallel to the reference plane T, are locally parallel to each other and are finally inclined with the respect to the lying plane G by an angle β preferably, though not necessarily, equal to 45°, and in all cases preferably ranging from 30° to 60°. - With reference to
figures 1 ,2 ,3 and4 , in the example shown, in particular, the wire-rods or the like hot-rollingmachine 1 is preferably, though not necessarily, provided with a horizontal, supportingcrossbar 7 which extends under the lying plane G of the wire-rods feeding paths p, in a direction locally substantially parallel to the wire-rods feeding paths p, and the rolling-mills assemblies 3 which form the variousrolling units 2 are fixed onto the supportingcrossbar 7 in pairs one beside the other with the longitudinal reference axes L alternatively in horizontal and vertical position, so as to intersect the lying plane G of the wire-rods feeding paths p with an inclination angle β ranging from 30° to 60° and preferably, though not necessarily, equal to 45°. - More in detail, with reference to
figures 1 and3 , the second rolling-mills assembly 3 of arolling unit 2 is arranged by the side of the first rolling-mills assembly 3 of the samerolling unit 2, but is moved/ shifted either forwards or backwards with respect to the first rolling-mills assembly 3 in a direction locally substantially parallel to the longitudinal reference axes L of the two rolling-mills assemblies 3 (and thus also parallel to the rotation axes R of the rolling mills 4), by a length ℓ in order to arrange the rolling grooves or throttling 4a of both rolling-mills assemblies 3 on the lying plane G of the feeding paths p of the two wire rods b, each at the feeding path p of a respective wire rod b to be hot-rolled. - With reference to
figures 3 and4 , in particular, the two rolling-mills assemblies 3 of eachrolling unit 2 are fixed to the supportingcrossbar 7 one beside the other, so that the distance or axes-distance w between the longitudinal axes L of the two rolling-mills assemblies 3 is shorter than the distance d between the two wire rods b, or rather between the two feeding paths p of the wire rods, and satisfies the following mathematical equation:
where d is the distance between the two feeding paths p of the wire rods, and β is the inclination angle of the rotation axes R of therolling mills 4 of therolling unit 2 with respect to the lying plane G of the feeding paths p of the two wire rods b. - Moreover, the two rolling-mills assemblies 3 of each
rolling unit 2 are fixed to the supportingcrossbar 7 one beside the other, so that the tworolling mills 4 of the second rolling-mills assembly 3 are moved/shifted either forwards or backwards with respect to the tworolling mills 4 of the first rolling-mills assembly 3 by a length ℓ in order to arrange the rolling grooves or throttling 4a of both rolling-mills assemblies 3 on the lying plane G of the feeding paths p of the wire rods, each at the feeding path p of a respective wire rod b to be hot-rolled. - More in detail, the two rolling-mills assemblies 3 of the
rolling unit 2 are arranged so that the distance or axes-distance w between the longitudinal axes L of the two rolling-mills assemblies 3, and the longitudinal offset value ℓ of the tworolling mills 4 of the second rolling-mills assembly 3 with respect to the tworolling mills 4 of the first rolling-mills assembly 3, satisfy the following mathematical equations:
where d is the distance between the two wire rods b or rather between the two feeding paths p of the wire rods, and β is the inclination angle of the rotation axes R of therolling mills 4 of therolling unit 2 with respect to the lying plane G of the feeding paths p of the two wire rods b. - With reference to
figure 3 , in the example shown, in particular, the two rolling-mills assemblies 3 of eachrolling unit 2 are fixed to the supportingcrossbar 7 one beside the other, so that the rotation axes R of therolling mills 4 are inclined with respect to the lying plane G of the feeding paths p of the wire rods by an angle β preferably of about 45°. Therefore, the distance or axes-distance w between the longitudinal reference axes L of the two rolling-mills assemblies 3, and the longitudinal offset ℓ between the tworolling mills 4 of the first and second rolling-mills assemblies 3 of therolling unit 2 must satisfy the following mathematical equations:
where d is the distance between the two wire rods b, or rather between the two feeding paths p of the wire rods. - With reference to
figures 1 ,2 , and3 , the two rolling-mills assemblies 3 of arolling unit 2 are additionally located on the reference plane T of theirrolling unit 2 in a specular position and offset with respect to the two rolling-mills assemblies 3 of the immediately adjacent rolling unit(s) 2, so as to arrange the corresponding longitudinal reference axes L according to a substantially W-shaped, crossed arrangement in which the vertexes of the two Vs are each arranged at the feeding path p of a respective wire rod b to be hot-rolled. - In other words, the two rolling-
mills assemblies 3 which belong to two adjacentrolling units 2 and which intersect the same wire-rod feeding path p the one after the other, are arranged on the corresponding reference planes T with the longitudinal axes L arranged in a specular position and reciprocally offset to one another, so as to cross each other at the feeding path p of the wire rod, i.e. so as to form a V whose vertex is located on the feeding path p of the wire rod. - Thereby, the rotation axes R of the two pairs of
rolling mills 4 cross each other at the feeding path p of the wire rod. - With reference to
figures 1 ,2 ,3 and4 , in the example shown, in particular, the rolling-mills assemblies 3 forming the various rolling mill stands orunits 2 preferably, though not necessarily, consist of a series of elementarysectional modules 10 with a mutually equivalent structure, each of which comprises: a preferably substantially parallelepiped-shaped, rigid box-like casing 11 which is arranged on the reference plane T of therolling unit 2 so that the longitudinal axis thereof coincides with the longitudinal reference axis L of the rolling-mills assembly 3, and so that theupper end 11a thereof directly faces the lying plane G of the feeding paths P of the wire rods; and a pair of rotating supportingshafts 12 which are inserted in axially rotating manner into theupper end 11a of the rigid box-like casing 11 one beside the other, and which cantileverly jut out from the sameupper end 11a of the casing towards the lying plane G while remaining coaxial to respective rotation axes R' locally parallel to each other and to the longitudinal axis L of the rigid box-like casing 11. - The two supporting
shafts 12 are furthermore inserted into the rigid box-like casing 11 so that the lying plane of the two rotation axes R' substantially coincides with, or is however parallel to, the reference plane T of therolling unit 2, and that the rotation axis R' of each supportingshaft 12 intersects the lying plane G of the two feeding paths p of the wire rods with an inclination angle equal to the inclination angle β of the rotation axes of therolling mills 4 with respect to the same lying plane G. - More in detail, with reference to
figure 4 , in the example shown, each supportingshaft 12 of the elementarysectional module 10 is preferably, though not necessarily, fitted in an axially rotating manner into a respective intermediate supporting bushing orbush 13 which is provided with a longitudinal, eccentric pass-through hole 13a, and is in turn inserted in an axially rotating manner into the body of the rigid box-like casing 11, so as to freely rotate about a reference axis locally parallel to the longitudinal axis L of the rigid box-like casing 11 and at same time offset with respect to the rotation axis R' of the supportingshaft 12. - The elementary
sectional module 10 is furthermore provided with a bushing moving mechanism (not shown), which is structured so as to vary, on command, the angular position of both supporting bushings orbushes 13 in a synchronized manner, so as to vary/adjust the distance between the rotation axes R' of the two supportingshafts 12. - With reference to
figures 1 ,2 ,3 and4 , each elementarysectional module 10 furthermore comprises adriving shaft 14 which extends coaxially to a reference axis A locally perpendicular to the longitudinal axis L of the rigid box-like casing 11 and to the lying plane of the supportingshafts 12, and is inserted in a pass-through and axially rotating manner through the rigid box-like casing 11, next to the lower end 7b of the same casing; and a series of toothed wheels andidle shafts 15, which are located within the rigid box-like casing 11, and are structured so at to transmit the rotary motion of the drivingshaft 14 to the two supportingshafts 12 with a predetermined angular speed reduction/increase coefficient. - Obviously, the reduction ratio of the
gear cascade 15 which connects thedriving shaft 14 to the two supportingshafts 12 varies according to the position of therolling unit 3 along the rolling line. - In addition to the above, with reference to
figures 1 and2 , the various elementarysectional modules 10 are preferably fixed to the supportingcrossbar 7 aligned one after the other so as to form four rows parallel to the feeding paths p of the wire rods, so to align thedriving shafts 14 along four reference lines parallel to one another and to the two feeding paths p of the wire rods. This configuration allows to mechanically connect the drivingshafts 14 of the various elementarysectional modules 10 in cascade to one another, preferably by means of simple joint sleeves (not shown). - Finally, with reference to
figure 1 , thedrive unit 5 is instead preferably arranged at the end of the supportingcrossbar 7, so as to be aligned with the four rows of drivingshafts 14, and preferably, though not necessarily, consists of a high-power,electric motor 16 and of abig reduction gearbox 17 which connects the drive shaft of theelectric motor 16 to the distal end of the fourfeeding shafts 14 of thefirst rolling unit 2 of the supportingcrossbar 7, i.e. the rollingunit 2 closer to driveunit 5. - General operation of the wire-rods hot-rolling
machine 1 is easily inferable from the above description, and thus no further explanations are required. - The advantages deriving from the particular structure of the single rolling mill stands or
units 2 are considerable. - Firstly, by virtue of the particular structure and arrangement of the rolling mill stands or
units 2, the wire-rods and the like hot-rollingmachine 1 is able to hot-roll two or more wire rods b in parallel by feeding the wire rods b along respective feeding paths p which are locally perfectly rectilinear and parallel to one another. This geometry allows to take the feeding speed of each wire rod b to the maximum value currently allowed for hot-rolling processes, i.e. up to about 100-120 meters per second. - The particular space arrangement of the rolling-
mills assemblies 3 forming the various rolling mill stands orunits 2 further allows the rolling mill stands 2 to be connected in cascade to one another, so as to use asingle drive unit 5 to simultaneously drive into rotation therolling mills 4 of all the rollingunits 2, thus significantly reducing the overall dimensions of the machine. - Furthermore, as each rolling
unit 2 consists of two completely separate and independent rolling-mills assemblies 3, the transportation on site and the subsequent assembly of the wire-rods and the like hot-rollingmachine 1 is greatly facilitated. - Finally, as each rolling
unit 2 consists only of to elementarysectional modules 10 which are substantially identical in structure, the design of the whole wire-rods and the like hot-rollingmachine 1 and the construction of single component parts are greatly simplified. - It is finally apparent that changes and variations can be made to the wire-rods and the like hot-rolling
machine 1 described above without departing from the scope of the present invention. - For example, with reference to
figure 3 , in a more sophisticated embodiment, the wire-rods and the like hot-rollingmachine 1 may be structured so as to hot-roll three or more metal wire rods b in parallel, which are fed one beside the other following respective feeding paths p which are locally substantially rectilinear, parallel and equally spaced apart, all lying on the same lying plane G which is preferably, though not necessarily horizontal. - More in detail, each rolling mill stand or
unit 2 ofmachine 1 may consist of three or more (three in the example shown) rolling-mills assemblies 3 preferably, though not necessarily, substantially identical to one another, which are arranged on the reference plane T of the roller-providedrolling unit 2 so to be parallel to and adjacent to the other, so as to place the respective rolling grooves or throttling 4a on the lying plane G of the wire-rods feeding paths p, each at the feeding path p of a respective wire rod b, and so that the rotation axes R of therolling mills 4 are locally substantially parallel to one another and to the reference plane T of the roller-providedrolling unit 3, while intersecting the lying plane G of the wire-rods feeding paths p with an inclination β preferably, though not necessarily, equal to 45°, and in any case preferably ranging from 30° to 60°. - In addition to the above description, the three or more rolling-
mills assemblies 3 are furthermore preferably arranged on the reference plane T of the rollingunit 2 so that the rotation axes R of therolling mills 4 are also all locally substantially coplanar to one another. - In the example shown, in particular, the three rolling-
mills assemblies 3 are preferably positioned on the reference plane T of the roller-providedrolling unit 3 one against the other. - Obviously, also in this case the three or more rolling-
mills assemblies 3 of a rollingunit 2 are located on the reference plane T of theirrolling unit 2 in a specular position and offset with respect to the three or more rolling-mills assemblies 3 of the immediately adjacent rolling unit(s) 2, so as to arrange the longitudinal reference axes L according to a substantially W-shaped, crossed arrangement, in which the vertexes of the two Vs are each arranged at the feeding path p of a respective wire rod b to be hot-rolled. - In other words, the two rolling-
mills assemblies 3 which belong to twoadjacent rolling units 2 and which intersect the same feeding path p of the wire rod one after the other, are positioned on corresponding reference planes T with the longitudinal axes L arranged in a symmetric position and reciprocally offset so as to cross each other along the feeding path of the wire rod p, i.e. so as to form a V, the vertex of which is on the feeding path p of the wire rod. - Finally, also in this case the rolling-
mills assemblies 3 may consist of a series of elementarysectional modules 10 which are preferably fixed to the supportingcrossbar 7 and aligned one after the other so as to form a double number of rows ofelementary section modules 10 as compared to the number of feeding paths p of the wire rods.
Claims (10)
- Wire-rod and the like hot-rolling machine (1) adapted to hot roll in parallel two or more wire-rods (b) which are fed one beside the other along respective feeding paths (p), and which comprises a plurality of roller-provided rolling units (2) which are arranged one after the other along the wire-rods feeding paths (p), so that each roller-provided rolling unit (2) can plastically deform all wire-rods (b) while these are fed along the respective feeding paths (p); wherein said feeding paths (p) are locally substantially rectilinear and parallel to one another; the wire-rod and the like hot-rolling machine (1) being characterized :- in that at least a first roller-provided rolling unit (2) comprises a plurality of rolling-mills assemblies (3), each of which is provided with a pair of opposite and counter-rotating rolling mills (4) which are arranged parallel and adjacent each other, so as to define a rolling groove or throttling (4a) through which the wire-rod (b) to be hot-rolled is forced; and- in that said rolling-mills assemblies (3) are arranged one beside the other, substantially coplanar to a corresponding reference plane (T) locally substantially perpendicular to the feeding paths (p) of the wire-rods, so as to arrange the respective rolling groove or throttling (4a) on the lying plane (G) of the feeding paths (p) of the wire-rods, each at the feeding path (p) of a respective wire-rod (b), and are oriented so that the rotation axes (R) of the rolling mills (4) of the various rolling-mills assemblies (3) are locally substantially parallel to one another and simultaneously intersect the lying plane (G) of the wire-rods feeding paths (p) with an inclination angle (p) greater than 5° and smaller than 85°.
- Wire-rod and the like hot-rolling machine according to Claim 1, characterised in that the rolling-mills assemblies (3) are arranged on the reference plane (T) so that the rotation axes (R) of the rolling mills (4) of the rolling-mills assemblies (3) intersect the lying plane (G) of the feeding paths (p) of the wire-rods with an inclination angle (β) in the range between 30° and 60°.
- Wire-rod and the like hot-rolling machine according to Claim 2, characterised in that the rolling-mills assemblies (3) are arranged on the corresponding reference plane (T) so that the rotation axes (R) of the rolling mills (4) of the rolling-mills assemblies (3) intersect the lying plane (G) of the wire-rods feeding paths (p) with an inclination angle (β) of about 45°.
- Wire-rod and the like hot-rolling machine according to any one of the preceding claims, characterised in that the rotation axes (R) of all the pairs of rolling mills (4) are locally parallel to the reference plane (T), and are substantially coplanar to one another.
- Wire-rod and the like hot-rolling machine according to any one of the preceding claims, characterised in that also a second roller-provided rolling unit (2) comprises a plurality of rolling-mills assemblies (3), each of which is provided with a pair of opposite and counter-rotating rolling mills (4) which are positioned parallel and adjacent each other, so as to define a rolling groove or throttling (4a) through which the wire-rod (b) to be hot-rolled is forced; and in that the rolling-mills assemblies (3) of said second roller-provided rolling unit (2) are arranged one beside the other, substantially coplanar to a corresponding reference plane (T) locally substantially perpendicular to the wire-rods feeding paths (p), so as to arrange the respective rolling grooves or throttlings (4a) on the lying plane (G) of the wire-rods feeding paths (p), each at the feeding paths (p) of a respective wire-rod (b), and are oriented on said reference plane (T) specularly with respect to the rolling-mills assemblies (3) of the first roller-provided rolling unit (2).
- Wire-rod and the like hot-rolling machine according to Claim 5, characterised in that each rolling-mills assembly (3) is provided with a longitudinal reference axis (L) which is parallel to the reference plane (T); in that the two rolling mills (4) of each rolling-mills assembly (3) are arranged in a specular position on opposite sides of said longitudinal axis (L); and in that the two rolling-mills assemblies (3) which belong to two adjacent roller-provided rolling units (2) and which intersect one after the other a same wire-rod feeding path (p), are arranged on the respective reference planes (T) with the longitudinal axes (L) arranged in a specular position reciprocally offset one with respect to another, so as to reciprocally cross on the wire-rod feeding path (p).
- Wire-rod and the like hot-rolling machine according to any one of the preceding claims, characterised in that the wire-rods feeding paths (p) are arranged at a distance (d) one from the other ranging between 0.3 and 3 metres.
- Wire-rod and the like hot-rolling machine according to any one of the preceding claims, characterised by comprising a supporting crossbar (7) which extends below the lying plane (G) of the wire-rods feeding paths (p) in a direction locally substantially parallel to the wire-rod feeding path (p); and in that the rolling-mills assemblies (3) which form the various roller-provided rolling units (2), are fixed on the supporting crossbar (7) in pairs one beside the other.
- Wire-rod and the like hot-rolling machine according to Claim 8, characterised in that the rolling-mills assemblies (3) which form the various roller-provided rolling units (2) are formed by a series of elementary sectional modules (10) structurally identical to one another.
- Wire-rod and the like hot-rolling machine according to Claim 9, characterised in that the elementary sectional modular elements (10) are fixed on the supporting crossbar (7) aligned one after another, so as to form a plurality of rows of elementary sectional modules (10) parallel to the wire-rods feeding paths (p).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000131A ITTV20110131A1 (en) | 2011-09-29 | 2011-09-29 | MACHINE FOR THE HOT LAMINATION OF VERGELLE AND AFFINI |
PCT/IB2012/055208 WO2013046178A1 (en) | 2011-09-29 | 2012-09-28 | Wire-rod and the like hot-rolling machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2747911A1 EP2747911A1 (en) | 2014-07-02 |
EP2747911B1 true EP2747911B1 (en) | 2015-11-04 |
Family
ID=45044660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12784720.0A Active EP2747911B1 (en) | 2011-09-29 | 2012-09-28 | Wire-rod and the like hot-rolling machine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140338413A1 (en) |
EP (1) | EP2747911B1 (en) |
CN (1) | CN103974786B (en) |
IT (1) | ITTV20110131A1 (en) |
RU (1) | RU2014117169A (en) |
WO (1) | WO2013046178A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107150067B (en) * | 2016-03-03 | 2019-02-12 | 中钢设备有限公司 | Wire coiling rolling line and production method |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3945234A (en) * | 1975-01-02 | 1976-03-23 | Rolf Steinbock | Tandem rolling mill arrangement |
US4537055A (en) * | 1984-06-20 | 1985-08-27 | Morgan Construction Company | Single strand block-type rolling mill |
IT1281465B1 (en) * | 1995-12-22 | 1998-02-18 | Danieli Off Mecc | COMPACT LAMINATION BLOCK |
CN2360178Y (en) * | 1999-01-08 | 2000-01-26 | 冶金工业部北京钢铁设计研究总院 | High speed wire rod finishing mill |
ITPN20010012A1 (en) * | 2001-02-15 | 2002-08-16 | Sms Demag Aktiengesellshaft | COMPACT LAMINATION BLOCK FOR TWO PARALLEL LINES. |
ITUD20010098A1 (en) * | 2001-05-25 | 2002-11-25 | Sms Demag Aktiengesellshaft | PERFECTED CONTINUOUS CASTING AND HOT ROLLING PLANT FOR THE DIVERSIFIED PARALLEL PRODUCTION OF BARS OR WIRES |
-
2011
- 2011-09-29 IT IT000131A patent/ITTV20110131A1/en unknown
-
2012
- 2012-09-28 WO PCT/IB2012/055208 patent/WO2013046178A1/en active Application Filing
- 2012-09-28 EP EP12784720.0A patent/EP2747911B1/en active Active
- 2012-09-28 RU RU2014117169/02A patent/RU2014117169A/en not_active Application Discontinuation
- 2012-09-28 US US14/348,425 patent/US20140338413A1/en not_active Abandoned
- 2012-09-28 CN CN201280058577.7A patent/CN103974786B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US20140338413A1 (en) | 2014-11-20 |
RU2014117169A (en) | 2015-11-10 |
CN103974786B (en) | 2016-08-24 |
ITTV20110131A1 (en) | 2013-03-30 |
CN103974786A (en) | 2014-08-06 |
EP2747911A1 (en) | 2014-07-02 |
WO2013046178A1 (en) | 2013-04-04 |
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