Danieli & C. Officine Meccaniche S.p.a.

Giacinto Dal Pan

Fausto Drigani

Cesare Galletti

Estore Donini

A coiling machine for hot rolled stock with a thickness of between 0.5 and more than 5 mm, arranged downstream of a rolling train and a shears assembly ( ). The coiling machine comprises a turntable assembly ( ) rotating around an axis of rotation ( ) orthogonal to the axis of feed of the rolled stock and lying on a plane substantially parallel to the plane of feed ( ) of the rolled stock wherein the turntable assembly ( ) supports two coiling mandrels ( ) arranged diametrically opposite each other and with an axis parallel to the axis of rotation ( ). The turntable assembly ( ) includes at least a first operating position wherein the first mandrel ( ) is in a position awaiting the leading end of the rolled stock and ready to being coiling, substantially cooperating with the plane of feed ( ) and at least a second operating position, rotated by 180&deg; with respect to the first operating position, wherein the first mandrel ( ) is in a position where the rolled stock is completely coiled and the coil ( ) is ready to be discharged and the second mandrel ( ) is in a position awaiting the leading end of the rolled stock and ready to begin coiling. At least a movable guide blade ( ) is arranged upstream of the turntable assembly ( ) and includes a first position of exclusion remote from the plane of feed ( ), a second working position cooperating from above with the plane of feed ( ) and a third position wherein it grips the rolled stock during the transition between the two aforesaid positions.

Coiling machine for hot rolled stock such as strip or sheet and relative coiling method

A method to eliminate the play between the chock ( ) and the support element ( ) in four-high rolling stands ( ), the rolling stand ( ) comprising working rolls ( ) and back-up rolls ( ) assembled on respective chocks ( ), support blocks ( ) to support the chocks ( ) and a stationary housing ( ), the support blocks ( ) to support the chocks ( ) and a stationary housing ( ), the support blocks ( ) being arranged between the uprights of the stationary housing ( ) and the relative chocks ( ) and supporting means for the crossover lateral displacement of the rolls ( ), the stand ( ) also comprising transmission means to transmit a thrust ( ) acting on the upper chock ( ) and contrasting the rolling thrust ( ), the method providing to define the value of the inward flection of the uprights of the housing ( ) according to the value of the rolling thrust ( ), to define the entity of play ( ) resulting, with the uprights ( ) in this condition of flection, between the chock ( ) and relative support block ( ) during the crossover movements of the chocks ( ), and to displace at least one support block ( ) towards the relative chock ( ) so as to minimize the play ( ) to a desired value at least during the rolling passes. A device to achieve the above method.

Method to eliminate the play between chocks and relative support blocks in four-high rolling stands and relative device

A coiling machine for hot rolled stock with a thickness of between 0.5 and more than 5 mm, arranged downstream of a rolling train and a shears assembly (,). The coiling machine comprising a turntable assembly (,) rotating around an axis of rotation (,) orthogonal to the axis of feed of the rolled stock and lying on a plane substantially parallel to the plane of feed (,) of the rolled stock. The turntable assembly (,) supporting two coiling mandrels (,) each arranged diametrically opposite each other and with an axis parallel to the turntable axis of rotation (,). The turntable assembly (,) has at least a first operating position wherein the first mandrel (,) is in a position awaiting the leading end of the rolled stock and ready to begin coiling, substantially cooperating with the plane of feed (,) and at least a second operating position, rotated by 180&deg; with respect to the first operating position, wherein the first mandrel (,) is in a position where the rolled stock is completely coiled and the coil (,) is ready to be discharged and the second mandrel (,) is in a position awaiting the leading end of the rolled stock and ready to begin coiling. At least a movable guide blade (,) is arranged upstream of the turntable (,) and includes a first position of exclusion remote from the plane feed (,), a second working position cooperating from above with the plane of feed (,) and a third position wherein it grips the rolled stock during the transition between the two aforesaid positions.

Coiling machine for hot rolled stock such as strip or sheet

A bending block for a four-high rolling stand comprising working rolls (,) and back-up rolls (,) associated with respective chocks (,), the stand also comprising a stationary housing (,) associated with means (,) for the crossing of the rolls, the working rolls (,) being able to be translated axially. The crossing means (,) cooperating with the outer lateral faces of the chocks (,) at least of the working rolls (,) by means of intermediate plates to distribute the thrust. There also being included bending jacks to bend at least the working rolls (,), the intermediate plates to distribute the thrust consisting of gibs (,) shaped like a vertical plate (,) with at least two fins (,) orthogonal to the vertical plate (,), the two fins (,) being arranged on one side and the other astride a fin extension (,) of the chock (,) of the relative working roll (,), the two fins (,) defining the respective positioning seating (,) for the bending jacks (,). There also being included between the crossing means (,) and the relative gib (,) a containing and guiding plate (,).

Bending block for four-high rolling stand

A shearing and coiling assembly for hot rolled stock with a thickness of between 0.5 and more than 5 mm, comprising a shearing unit (,) and a coiling machine (,) comprising a turntable assembly (,) rotating around an axis of rotation (,) orthogonal to the axis of feed of the rolled stock and lying on a plane substantially parallel to the plane of feed (,) of the rolled stock. The turntable assembly (,) supports two coiling mandrels (,) arranged diametrically opposite each other and with an axis parallel to the axis of rotation (,). The turntable assembly (,) includes at least a first operating position wherein the first mandrel (,) is in a position awaiting the leading end of the rolled stock and ready to begin coiling, substantially cooperating with the plane of feed (,) and at least a second operating position, rotated by 180&deg; with respect to the first operating position, wherein the first mandrel (,) is in a position where the rolled stock is completely coiled and the coil (,) is ready to be discharged and the second mandrel (,) is in a position awaiting the leading end of the rolled stock and ready to begin coiling. The shearing unit (,) can be moved between a working position in which it is aligned with the plane of feed (,) of the rolled stock, and an inactive position distant from the plane of feed (,).

Shearing and coiling assembly for hot rolled stock

In-line grinding device for mill rolls and/or pinch rolls, arranged in cooperation with the working surface of the working rolls (11) and/or support rolls (12) and/or intermediate rolls of a rolling stand for sheet, strip and/or wide plate, or in cooperation with pinch rolls placed downstream of the rolling stands and upstream of the winding reels, comprising a plurality of grinding units arranged at intervals on a single support (13) and defined by a grinding tool (17) rotating on a longitudinal axis (14) substantially parallel to the longitudinal axis of the roll (11, 12) to be ground, the grinding tools (17) covering in their entirety a substantial part of the length of the relative roll, each grinding unit (16) having the specific axis of rotation which is movable independently and autonomously with respect to the other grinding units (16) associated with the same stationary support (13), in a substantially radial direction with respect to the longitudinal axis of the roll (11, 12) to be ground.

In-line grinding device for mill rolls and/or pinch rolls

Sliding bearings for chocks (11) in back-up rolls (12) under load, the back-up rolls (12) cooperating with the respective working rolls (112) and being able to perform crossed displacement in a four-high rolling mill stand for the hot rolling of sheet and/or large plate, the chocks (11) cooperating on the outside with organs to transmit the load from the rolls to the stationary housing (21) and organs to regulate the gap between the working rolls (112), these organs comprising millscrews, hydraulic capsules (13), spacers, etc., the bearings comprising a revolving bearing with conical, truncated cone or barrel-shaped rollers arranged in an intermediate contact position between a lower sliding element, attached to the chock, and an upper sliding element solid with the relative organs to transmit the load, the top or the smaller base of the rollers facing the chock opposite the one with which they are associated, the rollers being disposed radially to define a circular section the center of which is defined by the vertical projection of the center of rotation of the relative back-up roll.

Sliding bearings for chocks in rolling mill stands with crossed

Device for the crossing of rolling rolls, whether they be working rolls (13) and/or back-up rolls (12), in a four-high rolling mill stand (10) for plate and/or strip, the device including an upper rolling block (11a) and a lower rolling block (11b), the working rolls (13) and the back-up rolls (12) being supported at the ends by respective supporting chocks (14) associated with stationary housing means (15) defining an inner space to house the chocks (14), cooperating with at least one side of at least one chock (14) there is at least one intermediate positioning element (18) associated with adjustment and positioning means (16), which comprise at least drive means (23) associated with bar means (22) solid with eccentric means (20) by means of arm means (21), the adjustment and positioning means (16) being located in a position outside the stationary housing (15), the eccentric means (20) being associated with rod means (24) which can be moved on their axis and at right angles to the vertical plane of the stand and acting on the intermediate positioning elements (18).

Device for the crossed displacement of rolling rolls

Compensation device for chocks in four-high rolling mill stands (13) with pair crossing of the rolls (12,112,14,114), the device (10) cooperating with the opposed sides of at least one chock (11) of at least one back-up roll (12, 14), the rolling mill stand (13) comprising a stationary housing (16) and means (21) to transmit a load force ('P') acting substantially on the longitudinal median plane of the stand (13) and contrasting the force of thrust ('S'), the transmission means (21) being located between the stationary housing (16) and the relative chock (11), the rolls (12, 14) including at least a crossover position wherein the load force ('P') defines an eccentricity ('e') with respect to the force of thrust ('S'), the device comprising actuator means (15,115) associated with at least one face of at least one chock (11) and exerting on the chock (11) a push-and-pull action associated functionally with the actual crossover position of the relative roll (12) in relation to the longitudinal median plane passing through the center line of the rolling mill stand (13) and/or functionally associated with the value of the eccentricity ('e').

Compensation device for chocks in four-high rolling mill stands with

Device for the crossed displacement of rolling rolls (10), whether they be working rolls and/or back-up rolls, in a rolling mill stand (11) for plate and/or strip, the rolls (10) being supported at the ends by respective supporting chocks (12) associated to stationary housing (13), the chocks including an inlet side and an outlet side, the chocks (12) on one roll (10) being associated with the device to position the rolls (10) in a crossed position, cooperating with at least one of the inlet and outlet sides of the chocks (12) of at least one roll (10), there also being a front cam (16), whose axis lies on a substantially parallel plane to the rolling plane, associated with drive shafts (15), the front cam (16) comprising at least two substantially cylindrical coaxial elements (17, 18), one connected to the drive shaft (15) and the other cooperating with the chock (12), the front cam (16) including front surfaces of reciprocal connection (19, 20) defining inclined radial sliding planes and at least two principles, the rotary movement imparted to the front cam (16) being functional to the lateral displacement of the chock (12).

Furnace for coils installed in a rolling line for wide plate or sheet in an intermediate position between the roughing train and the finishing train, the furnace including at least an inlet (25) and at least an outlet (26) respectively associated with at least a feeding way (12a) and at least a discharge way (12b) for the coils (11), the furnace being defined inside by a plurality of positioning stations (14) defining a substantially central transit channel (15) cooperating at the lower part with means (24) to lift and move the coils (11) step by step between the positioning stations (14), each of which positioning stations (14) comprising support means (118), the support means (118) of at least a desired number of positioning stations (14) located towards the outlet (26) of the furnace (10) including at least a first lowered working position (18a) where the lifting and moving means (24) cooperate with the coils (11) and at least a second raised working position (18b) where the coils (11) are in a position of no contact with the lifting and moving means (24) irrespective of the position which these means (24) assume.

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Cellatica, Italy

Giacinto Dal Pan