Abstract:
A transport path is defined by a plurality of consecutively arranged separately driven conveyor sections. A plurality of heat treating stations are spaced one from the other along the transport path. Coils are conveyed along the transport path through one or more of the heat treating stations. The speed at which the coils are conveyed on the separately driven conveyor sections is controlled to provide different transport and/or dwell times for the coils at different locations along the transport path.
Abstract:
Accumulators are interposed between an initial mill section having an elevated first production rate and each of a plurality of different outlet mill sections having lower second production rates. Each accumulator is constructed and arranged to receive intermediate products from the initial mill section at its elevated first production rate, and to deliver the intermediate products to the associated outlet mill section at its respective lower second production rate. The excess intermediate product resulting from the differential between the first and second production rates is stored temporarily in the accumulator. Switches direct successive intermediate product lengths from the initial mill section to selected outlet mill sections via their respective accumulators for simultaneous processing into packaged finished products.
Abstract:
A method is disclosed for subdividing and decelerating a hot rolled long product advancing along a delivery path from a rolling mill to a cooling bed. The method comprises: (a) arranging a shear and a decelerator in succession along the delivery path, with the decelerator comprising a set of driven pinch rolls preceded by a plurality of deflector rolls; (b) contacting a lead segment of the product with the pinch rolls operating at an initial speed at least equal to that of the advancing product; (c) actuating the shear to separate the lead segment from the remainder of the product; and (d) decelerating the lead segment by: (i) reducing the speed of the pinch rolls; and (ii) actuating the deflector rolls to deflect the product segment from the delivery path into a sinuous path.
Abstract:
A modular rolling mill comprises a plurality of separate rolling units arranged along a mill pass line. Each rolling unit includes at least two pairs of work rolls defining oval and round roll passes and carried on roll shafts that are staggered 90° with respect to each other. The rolling units contain intermediate drive trains configured to connect the roll shafts to parallel input shafts projecting to a first side of the pass line from the respective rolling units. A single driven line shaft is parallel to and on the first side of the pass line. Output shafts are mechanically coupled to the line shaft by bevel gear sets. The output shafts project laterally from the line shaft towards the pass line and are connected by separable couplings to the input shafts of the rolling units.
Abstract:
A method of continuously rolling a ferrous workpiece into a finished round, comprising rolling the workpiece in successive first and second roll passes at an elevated temperature of between about 650 to 1000° C., the first and second roll passes each being defined by two work rolls and being dimensioned to effect a combined reduction in the cross sectional area of the workpiece of at least about 20-55%, with an accompanying effective strain pattern dominated by a concentration of maximum effective strain at a central region of the cross sectional area; and while the effective strain pattern remains dominated by a concentration of maximum effective strain at a central region of the cross section, continuing to roll the workpiece in at least third and fourth consecutive roll passes, each of the third and fourth roll passes being defined by at least three rolls and being sized to effect a combined reduction in the cross sectional area of the workpiece of not more than about 4-25 %.
Abstract:
A rolling mill has roughing, intermediate and finishing roll stands on a first side of a billet reheating furnace, and a breakdown mill on an opposite second side of the furnace. Billets are heated to an elevated rolling temperature in the furnace and are then ejected to the second side of the furnace for rolling in the breakdown mill before being directed back through the furnace for continued rolling into finished products at the first side of the furnace in the roughing, intermediate and finishing roll stands.
Abstract:
A roll stand for a rolling mill, comprising: a support structure adapted to be fixed at a selected location along a mill center line. First and second work rolls are configured and arranged to roll products directed therebetween. The first work roll has roll necks journalled for rotation in bearings contained in first chocks, and the second work roll likewise has roll necks journalled for rotation in bearings contained in second chocks, with the first and second chocks of the work rolls being arranged in pairs located on opposite sides of the mill center line. The first and second chocks of each pair are connected to the support structure for pivotal movement respectively about parallel first and second connecting axes which extend in parallel relationship with respect to the axes of the rolls and orthogonally with respect to the mill center line. An adjustment mechanism is provided for simultaneously pivoting the first and second chocks of each pair in opposite directions about their respective connecting axes in order to symmetrically adjust the parting between the work rolls.
Abstract:
A system is disclosed for applying a liquid lubricant to first and second components enclosed in a housing, with the lubricant applied to the second components being exposed to contamination by a liquid coolant applied to the exterior of the housing, and with the lubricant applied to the first components being substantially isolated from the liquid coolant. The system includes a partition internally subdividing the housing into a first chamber containing the first components and a second chamber containing the second components. Lubricant is delivered from a storage tank to the housing for application to the first and second components. A first conduit network communicates with the first chamber for returning the lubricant applied to the first components to the storage tank, and a second conduit network communicates with the second chamber for returning lubricant applied to the second components to the storage tank. A liquid coolant removal unit in the second conduit network removes liquid coolant from the lubricant being returned to the storage tank.
Abstract:
In a modular rolling mill gear units are installed between selected rolling units in place of other rolling units which haven removed from the mill pass line to thereby provide a gap in the rolling sequence. Each gear unit is coupled to the drive units previously coupled to the respective removed rolling unit, and is configured to provide a continuation of the mill drive train end to accommodate operation of the next subsequent rolling unit at the speed of the respective removed rolling unit. The gear units carry water boxes or other equivalent cooling devices which serve to lower the temperature of the product between successive roll passes.