Parametric Computer Aided Hydraulic Cylinder Design: Cylinder Product Modeling

1990 ◽  
Author(s):  
Hans L. Johannesson
Keyword(s):  
Data Base ◽  
Hydraulic Cylinder ◽  
Independent Data ◽  
Product Modeling ◽  
Product Model ◽  
Data Bases ◽  
Cad System ◽  
Wire Frame ◽  
Data Base Management System ◽  
Base Management

Abstract In a hydraulic cylinder each cylinder component contributes to the total function, and the components interact and are dependent on each other. The geometry of some components can be completely determined by other surrounding interacting components. In this work it is shown how computer aid can be applied in hydraulic cylinder design when considering component interaction. A special hydraulic cylinder product model is developed. It is stored in an external CAD system independent data base. The parameters stored in the data base are used when retrieving component data from component family data bases, standard component data bases, and when running parametric component and system design programs. The software system used in this work consists of an ordinary 2D wire frame modeling turn-key CAD system, FORTRAN application programs, a data base management system, CAD system independent data bases and CAD system dependent interface programs.

A Design System for Parametric Design of Complex Products

1990 ◽  
Author(s):  
Johan Malmqvist
Keyword(s):  
Data Base ◽  
Parametric Design ◽  
Hydraulic Cylinder ◽  
Design System ◽  
Product Model ◽  
Complex Products ◽  
Constraint Management ◽  
Product Models ◽  
Data Base Management System ◽  
Base Management

Abstract In this report a design system for parametric design of complex products is presented. The system is based on product models for complex products and components. These models were implemented as general framework models using the data base management system TORNADO. The user creates models for specific products by filling out forms. Consequently, all products can be represented in a uniform way. This gives the advantage that all service software (for storage in the product data base, retrieval of component data etc.) associated to a certain product model can be shared. The only lines of code the designer writes when creating a new component family are the design rules of the component. In association with the models a design system for complex products is presented. Benefitting from the uniform representations of the products, the system lets the user control the design process, while a system kernel handles the constraint management. The product models and the design system have been applied to hydraulic cylinder design.

Computer Aided Part Design Based on Standard Component Interface Geometry

1991 ◽  
Author(s):  
H. L. Johannesson
Keyword(s):  
Performance Analysis ◽  
Data Base ◽  
Program System ◽  
Cad System ◽  
Standard Component ◽  
Computer Based ◽  
Data Base Management System ◽  
Base Management ◽  
Component Interface ◽  
Interface Geometry

Abstract In this paper it is suggested how an integrated computer based system for part design can be built. The main issue is how to automatically provide geometry data, determined by selected interacting standard components, to the used CAD-system. This kind of function determined geometry is in the paper called “interface geometry.” The key component in the integrated computer program system is the standard component data base. This data base contains a parametric model of the standard component and its “interface geometry”. Parameters necessary as input data both to component performance analysis programs and geometry creation programs, are all included in the model. The integrated program system consists of a data base, managed by a data base management system, application programs for component performance analysis and selection, and a conventional CAD-system. In order to make these different parts communicate, certain interface programs, both CAD-system dependent and independent, have been developed.

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