Walking beam cooler and stepping control method thereof

Abstract

The invention discloses a walking beam cooler control method, which comprises three stations, i.e. a high station, a middle station and a low station. The starting station of a cooler control cycle is the middle station. The cooler control cycle comprises the following steps of: from the middle station to the high station: starting a lifting device to vertically lift a movable beam to the high station and lift a workpiece to the high station; stepping forwards; and starting a transverse moving device to drive the movable beam to move forwards for one step; from the high station to the low station: starting the lifting device to drive the movable beam to be vertically lowered down to the low station from the high station, and when the top surface of the movable beam and the top surface of a fixed beam are at equal height, placing the workpiece on the fixed beam; stepping backwards; and starting the transverse moving device to drive the movable beam to move backwards for one step; and from the low station to the middle station: starting the lifting device to vertically lift the movable beam to the middle station from the low station to support the workpiece jointly with the fixed beam till the next control period. The invention additionally discloses a walking beam cooler. The cooling uniformity of steel plates can be improved, the buckling deformation is reduced and the situation of lifting delay is eliminated.

Description

technical field [0001] The invention belongs to the technical field of cooling beds, in particular to a step-type cooling bed control method and a step-type cooling bed suitable for the method. Background technique [0002] The medium-thick plate walking cooling bed is composed of a movable beam, a fixed beam, a traverse device and a lifting device. stay on top. The active beam of the existing step-by-step cooling bed has two lifting control positions - high position and low position (relative to the fixed beam). Support), the step control method is: start the lifting device, the movable beam starts to lift from the low position, and after running for a period of time, lift the steel plate from the fixed beam and continue to lift to the high position; then start the traverse device, and the movable beam lifts the steel plate at the high position Move one step forward; start the lifting device again, the movable beam supports the steel plate and descend from the high positi...

AI Technical Summary

Problems solved by technology

[0004] 1) The total time for the steel plate to pass through the cooling bed is composed of several stepping cycles and the waiting time for receiving materials, and the waiting time for receiving materials accounts for a large proportion of the total time; when the cooling bed is in the waiting state for receiving materials, the steel plate is only connected to the fixed Beam contact, and in the stepping cycle, the contact time of the steel plate with the fixed beam and the movable beam is equal, therefore, in the whole cooling process, the total time of the steel plate in contact with the fixed beam is longer, resulting in contact fixation on the steel plate The area of ​​the beam cools quickly, while the area contacting the movable beam cools slowly, which increases the non-uniform cooling of the steel plate in the length direction, resulting in increased internal stress and deformation;

[0005] 2) The distance between the fixed beam and the movable beam is L, and the fixed beam and the movable beam are arranged at equal intervals. When the cooling bed is in the waiting state for receiving materials (that is, when it is at a low position), the load of the steel plate is supported by the fixed beam with a distance of 2L. Its support span is relatively large, which is easy to cause the steel plate to drop and deform due to its own weight, especially when the waiting time for receiving materials is long and the thickness of the steel plate is thin, it is more likely to cause the steel plate to warp and deform;

[0006] 3) The starting position of the movable beam is at the low position. At this time, the movable beam is located under the fixed beam. When the movable beam is lifted from the low position to be flush with the fixed beam and hold up the steel plate during the running time, the steel plate is not lifted and moved. , leading to the existing stepping cooling bed and its stepping control method, there will be a hysteresis phenomenon in the lifting of the movable beam

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