Structure Design And Performance Analysis On The Cone Ring Of Tire Mould

The cone ring is the core component to ensure the mold clamping accuracy of the tire mold.This article takes the warping deformation,fracture and fatigue failure of the tire mold cone ring structure under actual working conditions as the entry point of the subject,applies theoretical mechanics,material mechanics and elastic mechanics related knowledge,establishes the mechanical model of the cone ring,and derives The calculation formula of the strength and stiffness of the cone ring.The finite element analysis software ABAQUS was used to perform finite element analysis on the cone ring structure to simulate the stress and strain of the cone ring during tire vulcanization,and the FE-safe software was used to analyze the fatigue life of the cone ring.The establishment of system design principles,design methods and design theories,provides theoretical guidance for tire mold manufacturers,so that the design of tire molds from the current experience-based design into a more systematic,scientific,standardized,theoretical,Standardized theoretical design.This paper takes the cone ring structure of all-steel tire active mold as the research object,and discusses the technical requirements and processing technology of the cone ring processing.Through the force analysis of the cone ring,and based on the knowledge of elastoplastic mechanics,the connection between the calculation formula of the stress of the cylindrical cylinder of equal thickness and the calculation formula of the stress of the cone ring of the tire mold is established;the calculation formula of the strength and stiffness of the cone ring is derived,and The theoretical minimum thickness of the equal thickness cylinder is used as a reference for the theoretical minimum thickness of thecone ring.Using the analysis software ABAQUS,thermal coupling finite element analysis was performed on the cone rings of different materials and guide angles,and it was found that the cone rings with 40 Cr as the material and the smaller the guide angle bear the smallest stress and strain;for the cone rings of different materials and structures The temperature and heat transfer simulation analysis found that the material is Q235 and the cone ring vulcanization effect that appropriately increases the heating area of the steam chamber is more ideal;for the simulation analysis of the matching form of the back of the bow and the block steam chamber,the tire mold with the matching form of the back of the bow is found And the precise control of the vulcanization effect in the block steam chamber is more ideal.By importing the thermal and mechanical coupling simulation results of ABAQUS into FE-safe for fatigue life analysis,the impact of different materials and guide angle sleeves on their fatigue life was analyzed,and it was found that using40 Cr as the material,the smaller the guide angle,the longer the sleeve life.The safety factor is higher.The finite element fatigue life analysis can not only obtain the fatigue life of the cone ring,but also clarify the parts with lower fatigue life of the cone ring,and indicate the optimization direction for improving the fatigue resistance of the cone ring.