Three-axis linkage tangent arc groove control method and system

The invention discloses a three-axis linkage tangent arc groove control method and system. The method comprises the following steps of configuring a cut arc r, and building a cutting path function according to the radius of the arc and the length of an arc segment; fixing the front face of a plate to a cutting table, establishing a three-dimensional rectangular coordinate system according to the moving directions controlled by the three drive shafts, and calculating the circle center, the initial cutting coordinates and the final cutting coordinates of an arc groove according to the cutting path function; starting a cutting blade; and controlling the three drive shafts to move in the three-dimensional rectangular coordinate system at the same time according to the cutting path function, and cutting the arc groove in the front face of the plate. According to the control method, three-axis linkage control is adopted, the position of the plate is sensed through a laser detection device, the height from the blade