Patent EP-2361699-A1 (EP)
Inventor: WEINZIERL KLAUS
IPC: B21B37/76
Filed: 2010-02-26
Abstract: The method for cooling a sheet metal (B) using a cooling section (1), which includes first coolant delivery devices (2) for cooling a sheet metal upper side (O) and second coolant delivery devices for cooling a sheet metal lower side (U), comprises achieving a predetermined target state of the sheet metal at a reference point by cooling during and/or after discharging from the cooling section, and determining a coolant delivery for first and second coolant delivery devices, where the first and second coolant delivery devices are oppositely arranged relative to the sheet metal. The method for cooling a sheet metal (B) using a cooling section (1), which includes first coolant delivery devices (2) for cooling a sheet metal upper side (O) and second coolant delivery devices for cooling a sheet metal lower side (U), comprises achieving a predetermined target state of the sheet metal at a reference point by cooling during and/or after discharging from the cooling section, and determining a coolant delivery for first and second coolant delivery devices, where the first and second coolant delivery devices are oppositely arranged relative to the sheet metal. The determination of the coolant delivery of the coolant delivery devices takes place based on a predetermined heat stream to be supplied from the sheet metal side turned towards the respective coolant delivery device, where a surface temperature of the sheet metal is considered for the heat stream to be supplied. A ratio of the heat steam to be supplied from the sheet metal upper side to the sheet metal lower side is adjusted in dependent of a flatness of the sheet metal when it enters into the cooling section, where the ratio is equal to one when the even sheet metal running into the cooling section. The ratio is adjusted when the uneven sheet metal running into the cooling section, so that the flatness of the sheet metal after passing through the cooling section is reduced relative to the unflatness of the sheet metal before passing through the cooling section. The determination step takes place based a specified equation. The coolant delivery for the coolant delivery devices is determined independent of the coolant delivery of the other opposite coolant delivery device relative to the sheet metal. The determination step takes place, so that the sheet metal is virtually divided into a first sheet metal and a second sheet metal parallel to the upper side or lower side, where the coolant delivery is separately determined for the first and second sheet metals. During the respective determination, a heat exchange is considered between the first and second sheet metals. For the first and second sheet metals, an individual temporal progression of a parameter described to an energetic state of the sheet metal is determined. The heat stream to be supplied for the sheet metal upper side and the sheet metal lower side is determined based on the parameter. During the consideration of the determination of the coolant delivery, the temperature of the sheet metal upper side and/or the temperature of the sheet metal lower side is always greater or equal to a predetermined boundary temperature of 350[deg] C during the passage through the cooling section. One of the sheet metal sides has a temperature that is greater or equal to the predetermined boundary temperature and is turned towards the coolant delivery device. Independent claims are included for: (1) a control- and/or regulating device for a cooling section; (2) a machine-readable program code for a control- and/or regulating device for a cooling section; (3) a storage medium with a machine-readable program code; and (4) a cooling section for cooling a sheet metal.