Analysis of Effect of Deep Hole Drilling Guide Bars and Hole Wall Extrusion on Hole Deflection
Deep hole machining is widely applied in many fields.The deviation of drilling hole is an important index to evaluate deep hole machining,and its quality directly determines the machining quality of deep hole parts.In order to study the influence of deep hole tool system on the deflection of hole axis in the process of deep hole machining,a contact model of guide pair is established based on the bending displacement theory of straight beam and the curved surface Hertz contact theory of elastoplastic mechanics,considering the bending effect of drill pipe with medium weak stiffness and the contact squeezing effect of guide bar on hole wall.The influence of drilling depth on the contact area of guide pair is ana-lyzed by the contact model of guide pair.The results obtained by the model are basically consistent with those obtained by drilling test.
intersecting tooth BTA drillguide sub contact modelcontact areadrilling depth
万方数据
维普
