Abstract: Automobile cover parts mold damaging because of improper operation,foreign body into mold or jams waste of mold in stamping process.By reinforcement plate mold damaging of rear longitudinal beam as an example,introducing the application of reverse engineering technology in mould repairing.Is proposed based on the three reverse CAD/CAE software function of their respective advantages for fracture set piece of repair process.First getting point cloud data by three-dimensional scanner,optimizing the point cloud data and the grid by the Geomagic Studio software,then using Geomagic Design Direct software for surface reconstruction,finally through the Geomagic Qualify software testing the precision of the reconstructed surface.Practice results show that this method can improve the accuracy of repair mould,reduce the production cycle.

Key words: mold repair, Geomagic Design Direct, point cloud, surface reconstruction, reverse engineering, reinforcement plate of rear longitudinal beam