AutoLISP

About: AutoLISP is a research topic. Over the lifetime, 191 publications have been published within this topic receiving 1138 citations.

A knowledge based system for automated design of deep drawing die for axisymmetric parts

Abstract: This paper presents the research work involved in the development of a knowledge based system (KBS) for automated design of deep drawing die for axisymmetric parts. The production rule based KBS approach of artificial intelligence (AI) is utilized for development of the proposed system. The overall system is organized in 27 modules. System modules are coded in AutoLISP language and user interface is created using Visual Basic 6.0 and AutoCAD software. The proposed system is capable to automate all major activities of design of deep drawing die such as manufacturability assessment of deep drawn parts, design of strip-layout, process planning, selection of die components, and modeling of die components and die assembly. The system is user interactive, flexible and has low cost of implementation.

Objects and Databases

Abstract: Part 1 Introduction: shortcomings of the relational model extensions of the relational model object oriented database systems. Part 2 Concepts of OOP: concepts of OOP in LISP and AutoLISP concepts of OOP in SmallTalk and OPAL. Part 3 Analysis and design methodology: developing an application. Part 4 Implementation techniques: indexing techniques transaction management perspective for OODBMSs.

A short note on an intelligent system for selection of materials for progressive die components

Abstract: Selection of materials for die components is an important activity during progressive die design in stamping industries. This paper presents an intelligent system for selection of materials for progressive die components. The proposed system SMPDC comprises of two knowledge base modules, namely DIEMAT and SELHRD. The module DIEMAT is designed for selection of materials for both active and inactive components of progressive die. The module SELHRD is developed for determination of hardness range of materials for active components of progressive die. Knowledge for both the modules of the proposed system is acquired, analyzed, tabulated and incorporated into a set of production rules of IF-THEN variety. The system is coded in the AutoLISP language and loaded into the prompt area of AutoCAD. The system is designed to interact with the user through the user interface. The usefulness of the proposed system is demonstrated through a sample run using an example of an industrial component. The knowledge base of the system can be modified depending upon the availability of new materials and advancement in technology.

CADDS: an automated die design system for sheet-metal blanking

Abstract: This article reports on the design and implementation of a Computer-Aided Die Design System (CADDS) for sheet-metal blanks. The system is designed by considering several factors, such as the complexity of blank geometry, reduction in scrap material, production requirements, availability of press equipment and standard parts, punch profile complexity, and tool elements manufacturing method. The interaction among these parameters and how they affect designers' decision patterns is described. The system is implemented by interfacing AutoCAD with the higher level languages FORTRAN 77 and AutoLISP. A database of standard die elements is created by parametric programming, which is an enhanced feature of AutoCAD. The greatest advantage achieved by the system is the rapid generation of the most efficient strip and die layouts, including information about the tool configuration.

A low cost knowledge base system framework for progressive die design

Abstract: This paper presents a low cost knowledge base system framework for progressive die design The task of building the system is divided into different modules for major activities of progressive die design Each module of the proposed framework is designed to interact with the user through the user interface A procedure for developing knowledge base system modules is described at length The rules of each module of the system are recommended to be coded in the AutoLISP language and loaded into the prompt area of AutoCAD This arrangement facilitates interfacing of design process with modeling and can be operated on a PC/AT For consultation, each module generates friendly prompts eliciting from the user data pertaining to the job An important module DIEGAGE of proposed framework for the selection of die gages is designed by using the developed methodology The output of this module includes recommendations on optimal dimensions of front spacer, back gage and distance between the die gages An illustrative example is included for demonstrating the usefulness of the developed module DIEGAGE The proposed system framework is flexible enough to accommodate new acquired knowledge for each module The low cost of the system framework makes it affordable by small and medium size enterprises