DAIHEN Welding and Joining Research Alliance Laboratories was established in Joining and Welding Research Institute, Osaka University since April 2019 aiming at technological development for innovative high performance and high efficiency in welding and joining fields.
Innovative R&D of the welding and joining technologies that brings about a shift in manufacturing is being promoted by combining the welding and device development technologies of DAIHEN corporation with the world class academic research of Joining and Welding Research Institute, Osaka University and education and research of Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University.

1) R&D that aims at improving the performance and expanding the application range of high quality and high efficiency welding process, that brought by essential understanding of arc physics and elucidation of joining mechanism from welding metallurgical point of view and prediction / evaluation of reliability.
2) R&D that aims at world’s top level novel joining technologies and high performance of welding process applying visualization technology, that brought by fusing the knowledge from the global academic research at Osaka University and the welding equipment and process control technology by DAIHEN corporation.
3) Raising world-class engineers and researchers by promoting students and young engineers to actively participate in the projects.

(1) Cold Spot Joining System

(2) Robotic system using Laser Ultrasonic Technic for non contact inspection.

(3) Laser arc hybrid dissimilar material joining system

(4) Development of durable torch

Members

Director Prof.

H. FUJII

Vice Director G. Prof.

T. ERA

S. A. Prof.

S. ASAI

G. Assoc. Prof.

K. KADOTA

S. A. Assist. Prof.

Y. TAKEI

Nippon Steel Future Manufacturing Research Alliance Laboratories was launched on April 2021 in JWRI, with the aim of developing innovative welding and joining technologies that will open up the future of manufacturing.
For realizing infinite potential of steel, R&D activities are being promoted by bringing together the world-leading research on welding and joining of Osaka University and material technology of Nippon Steel Corporation.

1. Evaluating applicability of joining process to advanced-steel
2. Elucidation and visualization of welding metallurgy

Macro and microstructures of liner friction welded joint of ultra high strength steel
(Photo : Provided by Research division of material joining mechanism）

Solidification cracking in laser welded steel plates

An Example of strain analysis for microstructural changes of welds due to aging

Members

Director Prof.

H. FUJII

G. Prof.

H. NISHIBATA

S. A. Assist. Prof.

K. JOTOKU

By 2050, Honda aims to realize a recycling-oriented society with “zero environmental impact” not only for products but also for the entire life cycle, including corporate activities. “Honda-Osaka Univ. Joining Technology Monozukuri Research Alliance Laboratories” has been established in Joining and Welding Research Institute, Osaka University in March 2024 to accelerate research and development that will bring innovation to mobility manufacturing. By fusing Osaka University's state-of-the-art joining technology with Honda's unique and original body technology, we will create exciting futures of mobility by realizing new joining technologies.

1) Development of joining technology aimed at product and factory evolution for achieving carbon neutrality by combining Osaka University's state-of-the-art joining science knowledge with Honda's production processes, core technology development capabilities, and ability to introduce on vehicle bodies and mass production.
2) The idea of a basic process that leads to easy disassembly and material separation technology, and research on the necessary technology to realize the process in order to realize resource circulation (closed recycling system).
3) Cultivation of strong researchers and engineers who can create an exciting future through activities where experts and students/young researchers respect each other's diverse ideas and opinions and can grow by thinking through the purpose and essence of each other.

(a) Solid phase resistance spot joining experiment machine

Reference : 20170727_civic-sedan_hatchback_p18.pdf (honda.co.jp) (March 12^th 2024)
(b) Inner frame body structure and roof blaze joining technology

Reference : 「パルス電流の波形制御と休止時間自動制御による高板厚比三枚重ねスポット溶接技術の開発」溶接学会全国大会講演概要集, 第114集 (2024).
(d) CDC new spot welding technology

Members

Director Prof.

H. FUJII

Vice Director Prof.

R. IKEDA

Vice Director G. Prof.

S. WATANABE

G. Researcher

T. MURAKAWA

S. A. Researcher

H. TOYODA

G. Researcher

M. KAMIKURA

G. Researcher

H. SAITO

G. Researcher

H. KOBAYASHI

The Nissan Motor Welding and Joining Joint Research Department aims to accelerate the development of advanced 3D printing and joining technologies required for next-generation automobile development. Our goal is to improve efficiency in traditional development and manufacturing processes. In particular, the automotive industry is experiencing rapid improvements in the performance of materials used, along with increasing diversification and complexity. To join these materials efficiently and with high quality, the development and practical application of new joining techniques are essential. Through cutting-edge research and development, we strive to strengthen our technological foundation and enhance our competitiveness.
(1) Research and development aimed at improving the performance and practical application of high-quality, high-efficiency layered manufacturing processes through an essential understanding of solid-phase AM (high-speed 3D printing technology), elucidation of bonding mechanisms from a welding metallurgy perspective, and prediction and evaluation of reliability.
(2) Utilizing a "High-brightness X-ray Transmissive Welding and Bonding Mechanism 4D Visualization System" to observe various bonding methods, directly understanding what occurs inside the material during welding, thereby developing optimal bonding conditions for different material combinations and logically evaluating the advantages and usability of various bonding techniques.
(3) Developing world-class engineers and researchers through the participation of young technical staff in projects.

High-brightness X-ray Transmissive Welding and Joining Mechanism 4D Visualization System

Solid-phase stacking method

Members

Prof.

H. Fujii

Guest Prof.

T. TARUI

Guest Prof.

Y. WATANABE

Visiting Researcher

K. KINOSHITA

Visiting Researcher

T. MATSUOKA

Visiting Researcher

T. KAMIMURA

Visiting Researcher

K. ISHII