Design And Research On Adaptive Pillar Based On Machining Of Aircraft Skin

In modern aircraft process of manufacture, the digital flexible technique of manufacture has become the future direction of development. Many novel types of airplanes are simultaneously being developed and produced, and old fixture has never demanded the moderation production, it has become the bottleneck for aeroplane rapid manufacture and production in bulk in our country. When the airplane thin-wall components (aircraft skin) which its big free-form surface is extremely bad rigidity and easy to distort is stretched already, it is the very difficult to machining and assembly based on the rigid surface localization technology. Multi-lattice forming vacuum sucker flexible fixture based on the flexible localization has become the hot studying and developing directions.This article first reviewed the present overseas advanced aviation enterprise on the flexible fixture about the advanced idea, the research and application situation, then proposed for designing a small experiment adaptive pillar base on multi-lattice flexible fixture system for paper research.Have designed the pillar specific structural and checked the calculation. It included the vertical transmission scheme, the main components of the selection and verification, motor torque and inertia's match and circuit design. And have analyzed some parts'strength and mode to make technical preparations for the large-scale prototype.Relying on principle of spherical plain bearing, have designed the universal vacuum sucker. Have used theoretical derive and Ansys software two ways to calculate the approximate average of universal ball pressure and maximum pressure. And then have tested the designed pillar.Lastly, have carried multi-point forming and multi-lattice flexible fixture for a comparative, and have studied the multi-lattice method of surface modeling, then derived three calculate way of the sphere center coordinate of Z axis. Finally, have discussed the multi-lattice flexible fixture control system,process design and simulation system.