Automatic compensation shearing method based on recognition of any inflection point of variable-thickness plate

The invention discloses an automatic compensation shearing method based on recognition of any inflection point of a variable-thickness plate. The automatic compensation shearing method comprises the following steps that (1) the standard data of the thickness and length of each segment of the variable-thickness plate are input into an operation interface of a shearing control system; (2) any inflection point on the first segment is selected as a set inflection point; (3) the shearing control system automatically collects the real-time data of the thickness and length of each segment of the variable-thickness plate, the real-time data are matched with the input standard data, and the position of the inflection point is automatically calculated out; (4) the shearing control system determinesthe shearing position according to the value of the length of the position between the set inflection point and the tail of the segment, and automatic shearing is completed; and (5) when deviation happens to the size of a cer