Patent EA-001058-B1 (EA)
Title: Shearing and coiling assembly for hot rolled stock
Inventor: DRIGANI FAUSTO
IPC: B21C47/06
Filed: 1998-07-14
Abstract: 1. Shearing and coiling assembly for hot rolled stock such as strip or sheet with a thickness varying from 0.5 to more than 5 mm, comprising a rolling train (100) which defines a substantially horizontal plane of feed (14), a shearing assembly (11) suitable to shear selectively the rolled stock and a coiling machine arranged downstream from the shearing assembly (11) to selectively wind the stock sheared by the shearing assembly (11), wherein the coiling machine (10) comprises a turntable assembly (12) rotating around a central axis of rotation (13) parallel to the plane of feed (14) and two coiling mandrels (15a, 15b) mounted rotary on the turntable (12) on diametrically opposite sides with respect to the central axis of rotation (13) and with their axes of rotation parallel to the central axis of rotation (13), the shearing and coiling assembly being characterised in that the shearing assembly (11) is mounted sliding on first guide means (50) arranged transverse to the plane of feed (14) and is selectively movable between a first working position, in which it is aligned with the plane of feed (14), and a second inactive position, in which it is distanced from the plane of feed (14), that a rollerway (16), arranged on a substantially horizontal plane, is mounted sliding on second guide means (62) arranged transverse to the plane of feed (14) and is selectively movable between a first working position, in which it is aligned with the plane of feed (14), and a second inactive position, in which it is distanced from the plane of feed (14), that when the shearing assembly (11) is in the first working position, the rollerway (16) is in the second inactive position and vice versa, and that the coiling machine (10) is suitable to assume an inactive position when the shearing unit (11) is in the second inactive position and the rollerway (16) is in the first working position. 2. Shearing and coiling assembly as in claim 1, characterised in that the shearing assembly (11) comprises a U-shaped bearing structure (47), on which is mounted a capsule (48) to support a pair of blade-bearing shafts (lla, llb), the capsule (48) being able to be selectively removed from the bearing structure (47). 3. Shearing and coiling assembly as in Claim 1, characterised in that the first guide means comprise at least a horizontal rail (50), that the second guide means comprise at least a horizontal rail (62), and that these rails are arranged orthogonal to the plane of feed (14). 4. Shearing and coiling assembly as in claim 1, characterised in that the rollerway (16) comprises a substantially horizontal supporting bench (60) on which a plurality of rollers (16a) are mounted rotary and that the turntable (12) is suitable to be arranged in an angled inactive position, with a first mandrel (15a) arranged below the rollers (16a) and a second mandrel (15b) arranged above the rollers (16a), means of protection against the heat (67, 68) being mounted on the bench (60) to be arranged between the mandrels (15a, 15b) and the rollers (16a) when the rollerway (16) is in the first working position. 5. Shearing and coiling assembly as in claim 2. characterised in that the bearing structure (47) is provided with vertical arms (47a, 47b) on each of which there is mounted a corresponding drawing assembly (19a, 19b) for the rolled stock. 6. Shearing and coiling assembly as in claim 2, characterised in that at least a first guide blade (20a) is hinged on the bearing structure (47) to guide the rolled stock towards the mandrels (15a, 15b). 7. Shearing and coiling assembly as in claim 6, characterised in that the guide blade (20a) is movable between a first exclusion position arranged distant from the plane of feed (14), a second working position cooperating with the plane of feed (14) and a third position to grip the rolled stock in the transitory segment between the two positions. 8. Shearing and coiling assembly as in claim 7, characterised in that a second guide blade (20b) is associated with the first guide blade (20a) and is also hinged on the bearing structure (47) to guide the rolled stock towards the mandrels (15a, 15b). 9. Shearing and coiling assembly as in claim 8, characterised in chat the two guide blades (20a, 20b) cooperate respectively from above and from below with the plane of feed (14). 10. Shearing and coiling assembly as in claim 6, characterised in that the guide blade (20a) is provided with means (22) to emit at least a jet of air or liquid for the rolled stock. 11. Shearing and coiling assembly as in claim 10, characterised in that the guide blade (20a) is provided with driven rollers (52) suitable to rotate at a peripheral speed greater than that of the speed of feed of the rolled stock. 12. Shearing and coiling assembly as in claim 10, characterised in that the guide blade (20a) is connected with another, upper guide blade (120a) suitable to guide the rolled stock being coiled on the mandrels (15a, 15b). 13. Shearing and coiling assembly as in claim 1, wherein an assembly (23) to guide the strip is suitable to cooperate selectively with each of the mandrels (15a, 15b), the turntable assembly (12) being able to assume, by rotating, a first angled position wherein a first mandrel (15a or 15b) is in correspondence with the plane of feed (14) and ready to receive the leading end of the rolled stock and to begin coiling, characterised in that the assembly (23) to guide the strip is normally arranged in a first inactive position outside the turntable assembly (12) and is selectively movable to a second working position, associated with the first angled working position of the turntable (12), in which it is suitable to cooperate with the leading end of the rolled stock to guide it around the first mandrel (15a or 15b). 14. Shearing and coiling assembly as in claim 13, characterised in that the turntable assembly (12) is suitable to assume, by rotating, a second angled working position, rotated by 180 degree  with respect to the first angled working position, in which a second mandrel (15b or 15a) is in correspondence with the plane of feed (14) ready to receive the leading end of the rolled stock and to begin coiling, while the first mandrel (15a or 15b) is at the same time in a position wherein the coil (30) is completely coiled and ready to be discharged, the assembly to guide the strip (23) being suitable to assume the inactive position during the rotation of the turntable assembly (12) from the first to the second angled working position and vice versa. 15. Shearing and coiling assembly as in claim 13, characterised in that the assembly to guide the strip (23) comprises a plurality of wrapper rollers (24) having their axes of rotation parallel to the central axis of rotation (13) and arranged along an ideal circumference beyond the area occupied by each of the mandrels (15a, 15b) to define a circular guide path for the leading end of the rolled stock around the mandrel which is temporally in correspondence with the plane of feed (14). 16. Shearing and coiling assembly as in claim 15, characterised in that there are at least three wrapper rollers (24) and have their axes arranged substantially at constant angled distances along the ideal circumference, and that at least one of the wrapper rollers (24) can be selectively distanced from the ideal circumference to allow the corresponding mandrel (15a, 15b) to be arranged between the three wrapper rollers (24). 17. Shearing and coiling assembly as in claim 15, characterised in that the wrapper rollers (24) are mounted on corresponding oscillating arms (26) connected to actuators (27) suitable to take them selectively far from the position of cooperation with the periphery of the respective mandrel (15a, 15b). 18. Shearing and coiling assembly as in claim 1, wherein each of the mandrels (15a, 15b) is provided with its own rotation shaft (36), characterised in that at least an assembly to support the mandrel (31) is provided to cooperate with the rotation shaft (36) of the mandrel which is in the position wherein the coil (30) is completed and discharged from the mandrel (15a, 15b), the assembly to support the mandrel (31) being movable from an inactive position and a working position wherein it cooperates with the shaft of the mandrel (36). 19. Shearing and coiling assembly as in claim 18, characterised in that the assembly to support the mandrel (31) comprises an arm (35) movable axially and including at the end support elements of the fork-type, hand-type or saddle-type, to support the shaft of the mandrel (36). 20. Shearing and coiling assembly as in claim 19, characterised in that at least a coil support assembly (32) is provided to cooperate from below with the coil (30) being formed in the position wherein the coil (30) is completely coiled and ready to be discharged from the mandrel (15a, 15b), the coil support assembly (32) being movable and including a first inactive position and a second position of cooperation with the coil (30). 21. Shearing and coiling assembly as in claim 20, characterised in that the coil support assembly (32) comprises a pair of rollers (40) associated with a movable trolley (39) and with a lifting actuator. 22. Shearing and coiling assembly as in claim 1, characterised in that at least an assembly (33, 34) to make coiling regular and uniform is provided to cooperate with the periphery of the coil (30) being formed in the position wherein the coil (30) is completely coiled and ready to be discharged from the mandrel (15a, 15b), the assembly (33, 34) to make coiling regular and uniform being movable and including a first inactive position and a second position associated with the periphery of the coil (30) being formed. 23. Shearing and coiling assembly as in claim 22, characterised in that the assembly (33, 34) to make coiling regular and uniform comprises an oscillating arm (42) with a roller (46) at the end. 24. Shearing and coiling assembly as in claim 23