Special Fixture Designed for the Fine Boring of Auto Engine Cylinder

The rationality and advancement of fixture has an important influence on the precision of fine boring which has a direct impact on the performance on auto engines and is one of the key processes of cylinder machining, so a special fixture was designed in this thesis in order to improve the capability of fine boring based on the characteristics of cylinder fine boring. The detail of operating principle, positioning/clamping mechanisms, elevating mechanism and air-operated system were introduce, practical applications indicated that, this fixture can be able to ensure the quality of machining, and improve the flexibility, conveniences and automaticity of the process of machining, so this fixture can greatly reducing the auxiliary time, reduce the production cost and labor intensity, and more satisfying the demand of mass production.