Jong-Rae Cho

Design for environment-friendly product

This paper presents an approach for systematically integrating design for x (DFX) into environmentally conscious product design. Evaluation methods and algorithms for design for assembly, design for disassembly, and design for recycling are proposed to estimate the assembly times and the disassembly times. By these results could be evaluated the assemblability, disassemblability, and recyclability of parts. Finally, a new integrated DFX system is implemented to help designers of product analyze environment-friendly products during the design process.

Development of Integrated System for DfD (Design for Disassembly) of Automobile in Design Phase

In order to improve the recyclability and to reduce the recycling cost and time, the disassembly technology should be systemized because the worn out products can be reused or recycled after disassembly processes. This paper attempts to propose the integrated CATIA-based DfD (Design for Disassembly) support system to promote the disassemblability of products. The system is composed of two modules; evaluation of disassemblability, generation of DfD alternatives. The disassemblability of current vehicle is evaluated to identify the weak point in terms of disassembly using the DELMIA and developed evaluation system. Furthermore a new expert system is developed to propose the optimal redesign rule and principle for generating the DfD alternatives. In order to generate the DfD alternatives, a CATIA-based design support system is implemented. The system can provide quick results and ensure consistency and completeness of the redesign alternatives.

Design for Using Purpose of Assembly-Group

In this paper, the disassemblability is determined by the detail weighting factors according to the using purpose of assembly-group. Based on the disassembly mechanism and the characteristics of parts and assembly-groups, the disassembly functions are classified into three categories; accessibility, transmission of disassembly power and disassembly structure. To determine the influencing parameters, some assembly-groups of an automobile are disassembled. The weighting values for the influencing factors are calculated by using of AHP (Analytic Hierarchy Process). Using these weighting values, the point tables for the using purpose are determined. Finally, an optimal design guideline for the using purpose of an assembly-group can be decided.