Research On Theory And Methodology Of Design Process Modeling Of Hydraulic Manifold Blocks & Its Application

Hydraulic manifold blocks (HMB) are the key components of the integrated hydraulic system. Whose design is the bottleneck for design of the integrated hydraulic system because of complexities of external layout of hydraulic valves and internal connection of oil routes. Some key technology problems are researched, including design process modeling of HMB which is adaptable, and the prototype software system for HMB rapid design, in order to realize rapid and efficient design of HMB, and improve adaptability for design processes and design results. The main contents and innovation are as following:1. The new concepts of generalized assembly and generalized assembly platform are given, and a design process modeling method of HMB which is adaptable based on generalized assembly is provided. With this method, the design process information, such as design knowledge and middle design results, is included in the generealized assembly platform. Then the design process model and KBE (knowledge-based engineering) technologies are combined in the CAD platform, and the problem that traditional design process model, KBE technologies and CAD system are difficult to be integrated is resolved. Finally, the design process can be traced, and design results can be easily revised, changed and reused.2. A construction method of hydraulic valve models and the open hydraulic valve library for HMB design is introduced. With this method, the information for HMB design is completely recorded in hydraulic valve solid model or database, and association technologies of 3D CAD software are used, so that the hydraulic valve library can be effectively used to HMB design, and some problems are solved because of incomplete information, poor association in traditional standard part library. In addition, the new models with the correct models and complete information can be easily added to the hydraulic valve library, because of adopted CBR (case-based reasoning) and RBR (rule-based reasoning) technologies.3. The mathematical model of dynamic feature of basic oil route of HMB is constructed. The parameters of oil holes in a basic oil route are saved in a dynamic feature matrix. The topological structures of dynamic features are defined according to the computing relations between vectors of technical hole starting planes and vectors of functional oil hole starting planes. Then solving algorithms for the unknown parameters in the matrix are deduced. The connection topology of oil routes can be easily changed, and the parameters of oil route can be edited in time through dynamic features, so that the design intentions of designer will be clearly expressed and quickly realized.4. The detailed geometric features of oil routes of HMB are automatically generated through feature mapping technologies from oil route dynamic features. In this process, all repeated tasks are finished by systems, and work intensity of designer is greatly lessened. Finally the connections of oil routes are validated, and minimum of walls of HMB is assured, through Boolean computing among solid models, so that exactness of design results is guaranteed.5. On the CAD platform of SolidWorks, with Visual Basic 6.0 as development tools, the prototype software for HMB rapid design has been developed. This prototype software is of friendly interface, which can easily realize human-computer interfacing, and can be used to design of HMB with footprint valves, stacked valves, cartridge valves and screw valves.The above research results make it richer of design theories of integrated hydraulic system and HMB. The software for HMB rapid design has been successfully used in the enterprises, which illustrates that the design ability for HMB of the enterprises can be effectively improved, and design period for HMB can be largely shortened after adopting this software.