摘要:
The invention relates to a method for assembling and/or starting machine units in installations, such as machine beds (1) and/or roll stands (2), e.g. in an existing production line of a hot-rolling mill. In order to minimize especially the downtimes during assembly, the machine bed (1) is prefabricated and the required or cooperating machine units are prefabricated and preassembled or assembled on site next to the production line (3), whereupon said machine units are inserted into the production line (3) as a complete structural unit including the bed block (1) and allocated driving members, control elements, fastening elements or similar, pipes and cables required for operation, and additional pieces of equipment.
摘要:
The invention relates to a rolling mill for tubes, in which a series of roll-holder containers (10) is housed in an external structure (2) extended along a rolling axis (L); the containers can slide inside the structure to be extracted therefrom and each one houses at least three rolls (17, 18, 19) controlled by respective driving motors (41, 42, 43). In accordance with the intervention the rolls (17, 18, 19) can be moved inside the containers (10) in a guided way along directions radial in relation to the rolling axis, in order to regulate the distance therefrom.
摘要:
A finishing monoblock for a billet lamination plant of the type comprises a plurality of lamination cages (G1Gn) arranged in sequence suitable for forming a lamination line and actuated by a pair of mechanical transmissions (22, 22′) actuated through at least one command reducer (23) for the lamination of the billet. According to the invention, said monoblock comprises at least one first module (M1) and a second module (M2′, M2″), of which at least one is disengageable from the lamination line through a pair of detachable joints (40).
摘要:
The invention relates to a method for changing the configuration of a rolling mill including at least two working rolls and two back-up rolls, means for applying a clamping load and two sets of hydraulic cambering cylinders, at least of both working rolls. According to the invention, at least two types of working rolls (C1, C2) are realised having, respectively a great diameter and a small diameter and the quarto configuration rolling mill is switched to a sexto configuration and conversely, the rolls with great diameter (C1, C′1) being used as working rolls in the quarto configuration and, in the sexto configuration, as intermediate rolls between each back-up roll and a roll with small diameter (C2, C′2) used as a working roll.
摘要:
The invention regards a device for disassembly of the rolls of a rolling mill by translation, successively, on internal (5) and external (55) rails whereon run the supporting rollers (7) of the chocks (3). According to the invention, each internal rail (5) is composed of two sections (51, 52) mounted to slide, respectively, on both standards (10, 100) of the stand (1), between a retracted rolling position and a forward disassembly position for which both sections (51, 52) are brought towards one another, their internal ends (53null, 54null) being separate by a free space (e), and each chock (3) is fitted with rollers (72, 72null) spaced from one another by a distance (d) greater than said free space (e) in order to rest successively on said sections (51, 52) during the disassembly and the reassembly processes.
摘要:
The invention relates to a four- or six-high rolling stand for a rolling train and to a method for operating the same. The aim of the invention is to provide rolling stands that can adapt rapidly to rolling products of different thicknesses and/or hardnesses. To achieve this, rolling stands are provided with minimum expenditure that can be selectively operated with both thin and thick working rolls. The inventive combined drive in the four- or six-high rolling stand allows thick working rolls to be directly connected to a motor, whereas thin working rolls are merely carried along by neighbouring back-up rolls or intermediate rolls by means of friction.
摘要:
A tandem strip-rolling line has a strip store between the mill so that when the upstream mill is open on the approach of a weld seam joining successive lengths, the downstream mill rolls strip stored in the strip store and conversely when the strip is halted upstream of the second mill, the strip is rolled in the first mill and fed to the strip store.
摘要:
The invention relates to a rolling mill for sizing tubes or cylindrical bodies such as bars, rods and so on, and is intended for the iron and steel industry. The rolling mill is made up of a multiplicity of fixed three-roll rolling units, i.e. of the type known per se in which the position of the rolls cannot be adjusted under load and they are kinematically connected to each other so as to be set in rotation simultaneously, downstream of which are a multiplicity of adjustable three-roll rolling units. In the latter units the position of the rolls can be adjusted even under load and the purpose of these is to carry out the finishing of the work that is to be sized. The invention enables excellent use to be made of the characteristics of strength of the fixed units and of accurate working of the adjustable units, with the result that it is possible to build an inexpensive but high-performance rolling mill. In a preferred embodiment, in the adjustable units the rolls are mounted on lever-type arms pivoting in planes lying radially with respect to the rolling axis.
摘要:
A rolling train, particularly tandem stand group, includes roll stands, particularly two universal stands and an edging stand arranged between the universal stands, wherein the roll stands are each equipped with guide fittings, and wherein the rolling train further includes a shifting platform arranged on the operator side and an exchange carriage moveable for changing rolls. The guide fittings are connected to the roll sets and can be moved out of the rolling line as a unit together with the roll housings on the operator side of the three roll stands.
摘要:
Block to provide curvature and balancing, which is suitable to impart an "IN" or "OUT" pre-curvature to processing rolls (11) of a four-high rolling mill stand (12) comprising a pair of processing rolls, lower (11a) and upper (11b) rolls respectively, each of which cooperates with a relative back-up roll (13a, 13b), the processing rolls (11a, 11b) and back-up rolls (13a, 13b) cooperating at their two ends with respective chocks (15a, 15b) and (16a, 16b) and relative bearings, the block comprising at least one lower rib (18a, 118a) and one upper rib (18b, 118b) including on their respective inner surfaces curvature jack means (20, 120) cooperating with the opposite surfaces of the chocks (15) of the processing rolls (11), supporting jacks (14) being included and cooperating with the chocks (16a, 16b) of the back-up rolls (13a, 13b), at least one rib (18) including on its outer surface compensation jack means (21, 121) which are actuated when an "OUT" pre-curvature is imparted to at least one processing roll (11) associated with the block (10), the compensation jack means (21, 121) acting on the chocks (16) of the corresponding back-up roll (13).