Patent EA-003382-B1 (EA)
Title: Method for operating a strip-casting machine used for producing a metal strip and a corresponding strip-casting machine
Inventor: MARTI HEIDRICH A
IPC: B22D11/06
Filed: 2000-09-19
Abstract: 1. A method for operating a strip-casting machine used for producing a metal strip, said strip-casting machine consists of a pair of casting rolls (22, 24) arranged in side-by-side parallel relation with a casting gap therein between and of lateral sealing elements (25) that are provided with respective sealing plates (61) at both sides of the casting rolls (22, 24) and that adjoin the casting rolls, the contact pressure of the sealing plate (61) against the casting rolls (22, 24) and/or the frictional conditions can be measured and the sealing plates (61) at the front faces (22', 24') of the casting rolls (22, 24) are positioned in such a manner that, it facilitates an extremely exact positioning of the sealing plates respective to the front faces of the casting rolls even in the heated operational state, characterized in that the position of the front faces (22', 24') of the casting rolls (22, 24) are measured in the direction of the casting rolls axis, wherein, at least one of the casting rolls (22, 24) is adapted to displace for the most precise adjustment of their the front faces (22', 24') relative to each other, in particular axially. 2. The method according to claim 1, characterized in that in case, when one of casting rolls by some reason has become shorter than the other by say 1.3 mm, the casting rolls are positioned to each other so that to provide a half value of the length difference that is by 0.15 mm. From each side. 3. The method according to claim 1 or 2, characterized in that the position of the sealing plates (61) are measured in the direction of the casting rolls axis and while adjusting compare them with the preset positions and, if necessary, correct them. 4. The method according to claims 1 to 3, characterized in that the sealing plates (61) are positioned relative to the front faces (22', 24') of the casting rolls (22, 24) accordingly at a distance of a few tenth of millimeters so as to closely fit the front faces with or without contact pressure. 5. A strip-casting machine for producing a metal strip, comprising a pair of casting rolls (22, 24) arranged in side-by-side parallel relation with a casting gap therein between and lateral sealing elements (25) that are provided with respective sealing plates (61) at both sides of the casting rolls (22, 24), means for measuring the contact pressure of the sealing plate (61) against the casting rolls (22, 24) and/or the frictional conditions between them, the sealing plates (61) are adapted for positioning relative to the front faces (22, 24) of the casting rolls, a processing block (100) is provided for adjusting and controlling lateral sealing elements (25) in the operational state, characterized in that sensors (127, 128, 129) of displacements with a monitoring device are provided for measuring the position of the front faces (22', 24') of the casting rolls (22, 24) in the axial direction of said casting rolls, the sensors (127, 128, 129) of displacements are in cooperation with a device for axial displacement of at least one of casting rolls and for adjusting sealing faces (22') of casting rolls (22) relative to each other. 6. The machine according to claim 5, characterized in that that the sealing plates (61) are positioned relative to the front faces (22', 24') of the casting rolls (22, 24) at a distance of a few tenth of millimeters so as to closely fit the front faces with or without contact pressure. 7. The machine according to claim 5 or 6, characterized in that at least one cylinder (71) is provided for displacing a corresponding sealing plate (61) in an axial direction of casting rolls (22, 24) the piston stroke of which is measured by a measuring link (151, 152, 153), the position of the plate is transmitted to a receiver (150) and further to the processing block (100). 8. The machine according to claims 5 to 7, characterized in that a respective cylinder (71) is provided with a pressure sensor (121, 122, 123) for measuring sealing plate (61) contact pressure. 9. The machine according to claims 5 to 8, characterized in that a respective lateral sealing element (25) is mounted on a carrying element (41) via a floating support and consists of the sealing plate (61) arranged on a supporting frame (64, 65), a cylinder acting thereon. 10. The machine according to claim 9, characterized in that the sealing plate (61) is arranged on the supporting frame using approximately horizontally and vertically positioned pivoted levers (66, 67), said pivoted levers (66, 67) are spherically mounted by one end on the supporting frame (64) and by the other end on the connecting plate (80). 11. The machine according to claim 9, characterized in that each pivoted lever (66, 67) is provided with a tensiometer (131, 141) to judge an effort character and further about the frictional conditions between the sealing plate (61) and the casting rolls (22, 24). 12. The machine according to claims 5 to 11, characterized in that several temperature sensors are preferably positioned in contacting zones of the sealing plate (61) and the casting rolls (22, 24) to secure a preventive control and earlier detection of leakages, faulty operation etc. 13. The machine according to claims 5 to 12, characterized in that a vibrometer (161) is mounted preferably on the sealing plate (61) for measuring vibrations of lateral sealing elements during a casting operational state.