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It is still a new technique to produce series of hydraulic radial piston pump using integrated CAD/CAM technique. That is, a hydraulic pump could be produced according to the required NC format program in NC machine tool (NC post-processing). The program is automatically generalized after the design stage in a RPCADM package is over. The one of the highlights to use the integrated CAD/CAM technique is how to use the similitude theory as basic principles for the series design in the CAD stage. Another is the method of transferring detail drawing into required G-codes based on the G-codes bank which NC machine tools could follow to produce the part. The theory and method are explicated in this paper. And the NC format program (G-codes file) conducted from CAD is shown. A package for CAD/CAM of hydraulic radial piston pump is introduced briefly.

Performance modelling is a method which has recently been developed at the Fluid Power Research Center at Oklahoma State University for hydraulic component and system analysis in industrial applications. The feature of this modelling method is that modularizing the system model from the isolated standarized component models is achieved as the most of other available methods have failed to do so. One of the advantages of the modelling method is that any coeffecient in the model can be acquired thru catalog data if it is available or through experimental data. Therefore, an approach for obtained the coefficients in the model is the key function of performance modelling. In this paper, the corresponding parameter identification program is used to obtain the unknown parameters in the model from experimental component data for the purpose of simulating a hydraulic system.