The invention discloses a method for improving double-strand folding control, which comprises the following steps of: (1) controlling the size of a blank, and increasing the width of a rolled piece by 50mm when the broadening ratio is greater than or equal to 1.5; when the broadening ratio is smaller than 1.5, the width of the rolled piece is increased by 20 mm; rolling a plate with the thickness greater than or equal to 50mm, and adding 50mm to the head and the
tail of a rolled Rolling a plate with the thickness of less than 50mm, and adding 60mm to the head and the
tail of the rolled piece; (3) inspection: (1) measuring the width before
cutting, if the width is insufficient due to double-strand folding, contacting an operator to confirm, and moving a cutter after confirmation; and (2) coloring four corners of the steel plate after double edges of the steel plate are
cut off, checking whether cracks exist or not, performing uniform
cutting after ruler placement according to sampling technical requirements, and timely contacting an operator to perform field confirmation if the cracks are found, so that the rolling plate shape and the size accuracy are accurately controlled by optimizing the rolling process and controlling the multi-pass PPO plane shape, and the quality of the steel plate is improved. In the
cutting process, whether double-strand folding of the cutting face is
cut clean is checked, four vertex angles are subjected to
dye penetrant inspection, and the steel plate yield is effectively increased.