Method for quickly optimizing geometric error compensation data of translational axis of five-axis numerical control machine tool

The invention discloses a method for quickly optimizing geometric error compensation data of a translational axis of a five-axis numerical control machine tool. The method comprises the following steps: 1) establishing a spatial positioning error model; 2) establishing an error database; 3) constructing a space error compensation table; 4) establishing a compensation data optimization model, and forming an optimization model of three surface diagonals and one body diagonal in a translational axis linkage mode; 5) completing iterative optimization and selection of a correction coefficient; 6) completing the compensation of the geometric error of the five-axis numerical control machine tool by the step (5); and 7) iterating the error correction data to a geometric error database, setting linkage trajectory detection and a preset positioning error threshold, and circulating the steps 2 to 6 to realize a machine tool precision guarantee mode of periodic detection, optimization and compensation. According to the i