By tradition process,the huge workpiece is too heavy and large to position and machine.The“Rough adjustment-Approach fitting
positioning-Modeling-Machining”process,after the part positioned and clamped roughly,was realized by the machine tool aligning the part's location.What is different from the normal 5-axis machine center is the two rotary axes of 5-axis machine center for huge workpiece are not table or head type.At the same time the measuring instrument was installed at the machine's main axle.A
post-processing of 5-axis machining for huge work piece was presented in this paper.With affine transformation,the algorithm described the coordinate transformation after the machine tool rotated angle A and B.The model of transformation was simplified by setting the affine coordinate axis in coincidence with the ones of the machine tool,and the algorithm can be programmed easily.With this method,the post-processing of I-deas CAM is programmed and successfully used in the measurement and processing of
maglev guide way girder in Shanghai.