Method and device for correcting size of tire rubber extrusion part

The invention discloses a method and a device for correcting the size of a tire rubber extrusion part. The method comprises the following steps: acquiring a size diagram of a tire rubber extrusion part; determining an i < th > slope of an i < th > straight line formed by the i < th > first point and the (i + 1) < th > first point in the n first points to obtain (n-1) slopes; determining the absolute value of the difference value between the ith slope and the (i + 1) th slope in the (n-1) slopes as the ith target difference value to obtain (n-1) target difference values; m abrupt change points are determined in the n-1 target difference values, and the jth abrupt change point in the m abrupt change points is the jth first point with the jth target difference value larger than a preset threshold value; and according to the coordinate of each abrupt change point in the target coordinate system, the corrected extrusion size of the tire rubber part is determined. According to the method, the technical problem that