Joining and Welding Research Institute (JWRI) has been a global pioneer in theoretical analysis and simulation research aimed at understanding the fundamental mechanisms of welding and joining phenomena since the 1970s. In 1996, JWRI organized an international symposium entitled “Theoretical Prediction in Joining and Welding,” thereby establishing its international reputation as a leading research center in the field of computational welding science. Subsequently, with JWRI serving as the core institution, a NEDO-supported project entitled “Development of Highly Efficient and Reliable Welding Technologies” was carried out. The achievements of this project have been further advanced through integration with the remarkable progress in computational performance in recent years. Today, Japanese manufacturing is undergoing a major transformation driven by globalization and rapid technological innovation. There is an increasing demand for next-generation manufacturing technologies based on theoretical prediction and scientific approaches, rather than relying solely on experience and highly skilled craftsmanship. To address these societal and industrial needs and to further strengthen the global presence of JWRI, this research center was established in 2007. As a world-leading center for computational welding science, the center promotes the advancement and international deployment of practical welding simulation software, including “JWRIAN” and “Idealized Explicit FEM.” Through close industry–academia collaboration and international joint research, the center aims to realize innovative digital manufacturing technologies for the future.

Development of Large-Scale High-Speed Welding Simulation

Mechanical Investigation of Welding Distortion, Residual Stress and Hot Cracking

Life Prediction and Structural Integrity Assessment of Welded Structures under Thermal and Mechanical Loading Environments

Development of Practical Welding Simulation Software JWRIAN and Idealized Explicit FEM

Development of Databases for Welding Distortion and Residual Stress and Their Application to Data-Driven Structural Strength Assessment

Members

Prof.

M. SHIBAHARA

Assoc. Prof.

K.IKUSHIMA

G. Prof.

N. MA

G. Prof.

H. MURAKAWA

G. Prof.

N. OSAWA

G. Prof.

M. FUJIKUBO

G. Prof.

C. LI

G. Assoc. Prof.

K. MIYAMOTO

In order to further reduce the weight, extend the life, and improve the strength and toughness of structural materials, it is essential to establish the reliability of each material including lightweight materials and actively promote the multi-materialization of members that consist of the right materials in the right place. In the NEDO-ISMA project, Osaka University has conducted "Fundamental Research for Friction Joining (46)", " Fundamental Research on Multi-Material Joining Technologies (64)", and “Development of Joint Performance Data-Base for Joining Technologies of Multi-Materials (64-B)". A new framework is needed to effectively utilize the new joining methods and the data created and accumulated through these technological developments. Using the new joining methods and analysis technologies developed in Japan as seeds, the “Joining Technology Hub” has been formed for continuing to utilize the current technologies and knowledge promoting research activities with the aim of practical applications in collaboration with industries and academic institutions.

Linear Friction Stir Welding Machine (Low-Temperature Linear Friction Welding: Low-Temp. LFW Machine)

Flat Friction Stir Welding Machine

Center Driven Double-Sided Linear Friction Welding Machine

Members

Prof.

H. FUJII

Prof.

M. TANAKA

Prof.

K. ITO

Prof.

H. SERIZAWA

Prof.

R. IKEDA

Prof.

N. MA

Prof.

M. TSUKAMOTO

Prof.

Y. MIKAMI

Assoc. Prof.

Y. SATO

Assist. Prof.

T. YAMASHITA

S. A. Prof.

K. USHIODA

S. A. Assoc. Prof.

Y. MORISADA

S. A. Assoc. Prof

Y. AOKI

S. A. Assist. Prof.

A. SHARMA

Technical Assistant

T. OGURA

Prof.*

M. OHATA

Prof.*

T. SANO

Assoc. Prof.*

T. OGURA

Assoc. Prof.*

Y. OGINO

Assoc. Prof.*

K. NOMURA

Assoc. Prof.*

H. SHOJI

Assist. Prof.*

T. MATSUDA

*Graduate School of Engineering,

Osaka University with three companies, Shimadzu Corporation, Furukawa Electric Co., Ltd., and Nichia Corporation established “Research Institute for Joining and Welding with Blue Diode Laser” to provide information and promote technological exchanges on blue diode lasers and processing technology in December 2020. From April 2022, the name was changed to "CO-CREATION CONSORTIUM FOR JOINING AND WELDING WITH BLUE DIODE LASER".
In recent years, a blue diode laser has been developed that enables efficient processing by greatly increasing the absorption rate for highly reflective materials such as copper, which was the biggest drawback of near-infrared lasers used for industrial purposes. Blue diode lasers have dramatically improved oscillation efficiency and output, and are now at the stage where they can be used for industrial purposes, but various problems such as cost and enforcement method remain. Aiming to solve various problems in applications, by holding seminars and safety seminars on a regular basis and providing technical consultations, we want to promote the spread of blue diode lasers, which have great potential as industrial lasers, and achieve wide range of applications and social implementations.

Research System

Members

Prof.

M. TSUKAMOTO

Assoc. Prof.

Y. SATO

G. Prof.

N. ABE

Assist. Prof.

K. TAKENAKA

S. A. Researcher

M. KATO

S. A. Researcher

R. HIGASHINO