The invention discloses a precise locating method for automatic
assembly hole making. A
hole making system is composed of a five-axis
machining machine tool and a
laser tracker. A product is mounted on an
assembly fixture and made to be in a stable
hole making state, the product and the
assembly fixture are together moved to the five-axis
machining center and fixed, the
laser tracker is used for building a coordinate
system through datum points of the assembly fixture, the appearance contour of the product is scanned, a
solid numerical model is generated from a
point cloud obtained by scanning in the reverse direction, measuring
software is used for automatically generating a hole site closest to the 3D space of appearance contour mathematical points of the product in space on the surface of the
solid numerical model, and the hole site is used as the basis of five-axis
machining hole making. The precise locating method has the advantages that machining precision is improved, complex operation and repeated calibration in the hole making process are omitted, precision of the hole making locating degree, the perpendicularity and the reaming cavity depth is better than the requirement of automatic hole making specifications, an expensive end
effector is not needed, manufacturing cost is lowered, and production efficiency is maximized.