Patent EA-001057-B1 (EA)
Title: Coiling machine for hot rolled stock such as strip or sheet
Inventor: DRIGANI FAUSTO
IPC: B21C47/34
Filed: 1998-07-14
Abstract: 1. Coiling machine to wind hot rolled stock such as strip or sheet with a thickness of between 0.5 and 5 mm, arranged downstream of a rolling train which comprises a shears assembly (11) from which the rolled stock emerges along a plane of feed (14), wherein the coiling machine comprises a turntable assembly (12) rotating around a central axis of rotation (13) parallel to the plane of feed (14), 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), characterised in that at least a first guide blade (20a) able to rotate orthogonally to the plane on which the rolled stock lies is arranged above the plane of feed (14) Co occupy a substantial part of the segment between the drawing assembly and the turntable assembly (12) to function as a fluid guide for the rolled stock towards the mandrels (15a, 15b) , the guide blade (20a) including at least a working position substantially parallel to the plane of feed (14) and being provided with means (22) to emit at least a jet of air and/or liquid against the upper surface of the rolled stock. 2. Coiling machine as in claim 1, characterised in that the guide blade (20a) is rotatable between a first exclusion position arranged above and distant from the plane of feed (14) and a second working position cooperating with the plane of feed (14) and substantially parallel thereto, there also being included at least a third position to grip the rolled stock in the transitory segment between the two positions. 3. Coiling machine as in claim 1, characterised in that a second guide blade (20b) able to rotate orthogonally to the plane on which the rolled stock lies is arranged below of the plane of feed (14) for a substantial part of the segment between the drawing assembly and the turntable assembly (12) to function as a fluid guide for the rolled stock towards the mandrels (15a, 15b), the second guide blade including at least a working position substantially parallel to the plane of feed (14) and suitable to deliver a jet of air and/or liquid against the lower face of the rolled stock to define, together with the upper guide (20a), a fluid channel of controlled passage. 4. Coiling machine as in claim 1, characterised in that the first 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. 5. Coiling machine as in claim 1, characterised in that the first guide blade (20a) is terminally connected with another, upper guide blade (120a) able to rotate orthogonally to the plane on which the rolled scock lies in an autonomous manner and suitable to guide the rolled stock being coiled on the mandrels (15a, 15b). 6. Coiling machine as in claim l, 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 comprises a plurality of wrapper rolls (24) operating directly on the rolled stock and having their axes of rotation parallel to the said central axis of rotation (13) and arranged along an ideal circumference outside the area occupied by each of the said mandrels (15a, 15b) so as 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), 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 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). 7. Coiling machine as in claim 6, characterised in that the turntable assembly (12) is suitable to assume, by rotating, a second angled position, rotated by 180 degree  with respect to the first angled 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 position and vice versa. 8. Coiling machine as in claim 6, characterised in that there are three wrapper rollers (24) and have their axes arranged substantially at 120 degree  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). 9. Coiling machine as in claim 7, characterised in that the wrapper rollers (24) are mounted on corresponding oscillating arms (26) connected to actuators (27) suitable to cake them selectively far from the position of cooperation with the periphery of the respective mandrel (15a, 15b). 10. Coiling machine as in claim 7, 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 or 15b), the assembly to support the mandrel (31) being movable between an inactive position and a working position wherein it cooperates with the shaft of the mandrel (36). 11. Coiling machine as in claim 10, 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). 12. Coiling machine as in claim 7, characterised in that at least a coil support assembly (32) is provided to cooperate from below wilh 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). 13 Coiling machine as in claim 12, 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. 14. Coiling machine as in claim 7, characterised in that at least an assembly (33, 34) to make coiling regular and uniform is provided Co 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. 15. Coiling machine as in claim 14, characterised in that the assembly (33, 34) to make coiling regular and uniform comprises an oscillating arm with a roller at the end. 16. Coiling machine as in any claim hereinbefore, characterised in that a roller-way (16) is provided downstream of the drawing assembly and is suitable to assume a first retractable position and a second position cooperating with the plane of feed (14), the roller-way (16) extending beyond the turntable assembly (12).