Hak-Soo Mok

Disassemblability of mechanical parts in automobile for recycling

It is important to make use of the scrapped materials, components, and subassemblies which have still high quality and reliability in an out of service cars from the view point of economy and environment. In this paper, we studied geometrical and material characteristics of parte, subassemblies and joining elements to be assembled in designing a car. The mechanism of disassembly between parts and subassemblies is analyzed in order to disassemble recyclable parts in a scrapped automobile. The weak points of disassembly process are analyzed and the parameters for disassemblability are defined. And the guidelines for disassemblability are developed.

Automation of mold designs with the reuse of standard parts

This study has developed an effective reuse and retrieval system that can easily register modeled standard parts using a simple GUI (graphic user interface) even though designers may not know the rules of registration for a complex database. Also, the automatic generation of the optimized parts list has been investigated. The system has been developed in the Windows XP environment using an Open API (application programming interface) and a commercial CAD/CAM/CAE solution. It consists mainly of three kinds of module, i.e., a standard part module, parts-list module, and retrieval-system module. The standard part module is helpful for designers to effectively reuse or modify standard parts after registering them using a GUI. The parts-list module generates a parts list using either standard and/or non-standard parts. The retrieval-system module allows the effective retrieval and classification of standard parts. The system was applied to standardize mold bases and mold parts. It was applied to Hyundai Heavy Industry, S. Korea, which resulted in the reduction of design errors and design time.

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.

Remanufacturing for Automotive Electronics Control Parts

Remanufacturing of automobile parts is important for increasing the recycling resources. ECU(Electronic Control Unit) systems are becoming an increasingly important part of an automobile. But production company are reported in the ECU remanufacturing industry of domestic automobile parts due to a lack of remanufacturing technology and marketability. This paper introduces the ECU of remanufacturing, also grasps the structure and the analyzes failure cause that is external factors and fault in the characteristic design and steps in the Independent ECU remanufacturing process. The ECU manufacturing industry of the US was examined. The results in this paper could be used as the system information for further remanufacturing industry of domestic automobile parts.

Systematical Discrimination of Bolt for Maintenance

In this paper, we analyze the standards of the bolts for maintaining the products. The maintainer don`t know the detail information of bolts by seeing the shape of bolts when they repair the products. So they waste much time and cost. To solve the these problem, we propose the new systematical discrimination of bolts. To propose the discrimination code, we divide the shapes of the bolts into four classes(head, internal drive, shank and end). User can fine preferentially similar standards by just the shapes of bolts under the this discrimination code. And, User can find the standards of bolts that they want by using the additional information such as measurements. We will reduce the cost and time for the maintaining the products by using the proposed discrimination code.

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.