NC Gear Hobbing Comprehensive Space Error Model Based on the Theory of Multi-body System

For improving NC gear hobbing machining precision of the bed,and combined with self-designed NC gear hobbing bed,using numerical control machine tool error research in recent years the new method-modelling multibody system theory to the bed six shaft gear hobbing error analysis geometry,an integrated space error model is established,and the integrated error change rule is achieued.This can be theoretically referred when using a numerical control error compensation method to improve accuracy of the machining roll teeth.