Loader Working Device Based On The Virtual Prototype Design

Facing more intense global market competition, manufacturing enterprise have to adjust their product design and fabrication mode frequently to meet the rapidly changing market requirement. In order to improve the traditional construction machinery design process, this dissertation presents and studies Virtual Prototyping (VP) technology, which has been approved to be a powerful CAD method. And then introduces the new technology into the field of loader design to satisfy the urgent requirement of domestic construction machinery enterprise. There are five parts presented and studied as following:First of all, the basic theory of VP is introduced and the development of VP technology in china and aboard is reviewed, and then the significance of the application of VP technology in loader design is demonstrated.After analyzing the structure and the design methods of loader, this paper puts forward a new strategy for the design of the bucket-tipping device based on Pro/E, ADAMS and ANSYS.On the basis of the theory of parametric feature modeling, the constraints and dimension parameters of the bucket-tipping device are analyzed, and then the parametric feature entity model is established using Pro/E.Modeling and simulation methods in ADAMS are discussed, and the forces on wheel loader under symmetrical loads and extreme partial loads are analyzed. Afterward, a dynamic simulation model is built to test the dynamic performance of the bucket-tipping device of loader. Based on the operation principle of the hydraulic system for bucket-tipping device, a hydraulic simulation model is established and integrates with the mechanism model of the bucket-tipping device.Structure static analysis is taken on the arm of the bucket-tipping device. At last an optimization design strategy is developed based on VP, nerve network and genetic algorithm.