Patent ID: 8706281
Filing Date: 2014-04-22
Classification: B29C,G06T

Abstract:
1. A method of producing a master die tool for a component, the method which comprises the following steps: a) receiving or generating a CAD model of the component; b) deriving a surface model for the master die tool based on the CAD model of the component; c) creating the master die tool with NC machines using the surface-model model; d) producing an entity of the component using the master die tool; e) detecting contours of the entity of the component by way of a computed-tomography-based coordinate measuring appliance, which supplies a 3D point cloud of surface points of the entity of the component; f) comparing the 3D points from the 3D point cloud with the CAD model and establishing whether or not there exist deviations above predefined tolerance levels, and, if such deviations exist: g) modifying the surface model on a basis of the deviations thus established to form a modified surface model; h) reworking the master die tool or recreating the master die tool with the NC machines on the basis of the modified surface model; i) repeating steps d) to h), until the deviations above the predefined tolerance levels have been eliminated; bringing about mirroring on the surface of the surface model or the modified surface model by drawing a straight line through a 3D point and a corresponding point on the intended surface of the component according to the CAD model, and by establishing a distance vector pointing from the 3D point to the corresponding point on the intended surface, displacing the distance vector along the straight line such that the initial point of said vector coincides with an intersection point of the straight line and the surface of the master die tool according to the surface model or the modified surface model, with the displaced distance vector pointing to the corrected 3D point.