Numerical simulation is becoming one of the main methods to investigate various engineering problems with sophisticated conditions. A considerable amount of research is conducted on numerical analysis of sheet metal forming process to address different aspects of the problem. Among the numerical simulation methods for sheet metal forming process, finite difference method (FDM) and finite element method (FEM) have been the main methods. In this paper, the progresses in simulation techniques, advantage and disadvantage of numerical methods for simulating sheet metal forming process are discussed based on these numerical methods. Currently, FEM being the main simulation method for sheet metal forming, development in solution strategies and formulation, element selection are further brought into attention. Historical development of anisotropy and yield criteria, which are theoretical foundation for numerical simulation, and their application in simulation software are briefly classified. Formability of sheet metal is presented from the numerical simulation point of view. Numerical investigations on springback are reviewed in terms of simulation techniques and factors influencing springback. Simulation techniques for novel sheet metal forming techniques such as laser forming and incremental sheet forming (ISF) are presented.

Numerical simulation of sheet metal forming: a review

Multi-stage cold forging and experimental investigation for the outer race of constant velocity joints

On critical surface strain during hot forging of lubricated aluminum alloy

Determination of JMAK dynamic recrystallization parameters through FEM optimization techniques

Tool design for inner race cold forging with skew-type cross ball grooves

Three-dimensional simulation of forging using tetrahedral and hexahedral elements

A pump cap, which is widely used in daily life, is a cap which holds contents inside a container and can discharge it through a simple pump operation. It provides a useful storage solution and is easy to use. However, existing pump caps contain heterogeneous materials, making it difficult to separate, and this causes many problems for recycling. In this study, an eco-pump module made of an eco-friendly plastic material was designed for easy recycling and injection molding analysis was performed using a CAE program. In addition, the moldability according to the injection conditions was analyzed to enable the selection of conditions which produce high-quality eco-pump modules. 

Analysis of the Injection Molding Process for an Eco-pump Module Formed from Eco-friendly Materials

소재를 고정하기 위한 가압력은 소재의 기계적 특성과 형상에 따라 적절히 선정되어야 한다. 그러나 CNC 선반가공 등에서 공작물을 고정하는 적절한 가압력은 크게 고려되지 않고 있으며, 일반적으로 제조사의 기계 제작 시 설정된 압력 및 고정 조건으로 고정된다. 종종 임의로 압력을 조절하거나 가압부의 접촉 면적을 조절하기도 하지만 작업자의 경험에 근거하고 있을 뿐이다. 소재에 가해지는 가압력은 가압부 면적에 따라 그 효과가 달라진다. 본 논문에서는 접촉폭과 길이의 변화에 따른 가압부 면적에 의한 소재의 변형과 응력에 미치는 영향을 고찰한 후 가압 효과를 분석하였다. 연구를 위해 중공 소재의 기계 구조용 강인 SM45C를 대상으로 구조 해석 방법을 채택하였다. 그 결과 가압부의 접촉길이보다는 폭의 증가가 공작물의 고정에 더 효과적인 것으로 확인하였다. 

S. M. Jang

Papers

Three-dimensional simulation of forging using tetrahedral and hexahedral elements

Analysis of the Injection Molding Process for an Eco-pump Module Formed from Eco-friendly Materials

A study on the fixing effect according to the area of the pressing portion of the hollow shaft

Applicability of the Ti6Al4V Alloy to the Roller Arm for Aircraft Parts Made Using the DMLS Method