| 摘要 |
The present invention relates to a method for grabbing a slab of a tong crane and provides following steps. Information on a width, thickness, and a scarfing depth of each slab to be transferred by the tong crane is collected. A first control value of a rising block is calculated based on the stack thickness of the slab using each thickness information of the slabs to be transferred. A second control value of the rising block is calculated based on the width of the lowest slab using a gap between link shafts and a distance between the link shaft and tip. A final control value is calculated by adding the first control value to the second control value. A griper of the tong crane is operated after the block moves up based on the final control value. [Reference numerals] (AA) Start;(BB) End;(S10) Set the reference position of a tong crane's lifting block;(S20) Collect information about the slab width and thickness of a slab to be transferred and scarfing information of the slab;(S30) Calculate a first control value for the laminating thickness of the slabs using each slab's thickness;(S40) Calculate a second control value for the width using the distance between a link axis and a tip as well as the width of a slab at the bottom;(S50) Calculate a final control value by summing up the first control value and the second control value;(S60) Lift the lifting block, which is set at the reference position, by the final control value and grip the slab at the bottom |
