적층 제조 고려 설계를 위한 함수장 기반 CAD 시스템 개발 = Development of a Field-driven Computer Aided Design System for Design for Additive Manufacturing

다국어 초록 (Multilingual Abstract)

Design for additive manufacturing (DfAM) approach is a design method to utilize benefits from the implementation of additive manufacturing. In this approach, all design information in geometries, materials, and manufacturing processes domains are efficiently integrated. However, existing computer-aided design (CAD) systems cannot efficiently support DfAM activities because all design information including materials and manufacturing process conditions should be represented by only geometric information. The goal of this study is to develop a field-driven CAD system to support DfAM activities. To achieve the goal, shape modeling techniques based on implicit representations were implemented, and methods to create and utilize shape-material-process function fields for DfAM approaches were proposed. To validate the effectiveness of the proposed CAD system, DfAM activities including local shape modification, cellular structure generation, and AM process optimization were performed, and the results showed that the CAD system efficiently supported the DfAM approaches.

국문 초록 (Abstract)

적층 제조 고려 설계는 설계 단계에서 적층 제조의 장점을 활용하는 설계 기법으로 제품의 형상, 사용되는 재료, 적층 공정의 정보가 모두 고려된다. 그러나 기존의 컴퓨터 지원 설계 소프트웨어들은 형상 정보만을 이용해 형상, 재료 및 공정에 대한 정보를 표현하기 때문에 모든 정보를 복합적으로 고려하는 적층 제조 고려 설계 기법을 효율적으로 지원하기 어렵다. 본 연구에서는 적층 제조 고려 설계를 효율적으로 지원하기 위한 함수장 기반 CAD시스템을 구축한다. 이를 위해 음함수 기반 형상 표현 기법을 구현하고, 적층 제조 고려 설계를 지원하기 위한 형상-재료-공정 함수장의 생성과 활용 기법을 개발한다. 구축된 CAD 시스템을 사용하여 적층 제조를 고려한 국부 형상 수정, 격자 구조물 생성, 적층 제조 공정 최적화를 수행하였고 그 효용성을 확인하였다.

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