The 9th "Bonding Day" Bonding & Composite Technology Exchange Conference (Part 2)

The excitement continues on the second day of the conference! There are a total of 9 speeches today, including from glue-using companies in composite materials, rail transit and other fields, as well as from surface treatment equipment and adhesive manufacturing companies. They are all experienced experts in various fields.

Summary of conference speech

The opening speaker on the second day was Professor Yi Xiaosu. Professor Yi was once the chief expert of composite materials technology in the Aviation Industry Corporation of China and is currently the chief professor of composite materials technology at the University of Nottingham Ningbo China. The title of his speech today is: High-Performance Structural Bonding Technology. Professor Yi first introduced the current status and challenges of structural adhesive technology in the aviation and automobile industries; secondly, he shared ASTM D5656-10, the testing and evaluation method for the mechanical properties of structural adhesive joints; he also discussed the mechanical properties and structure of the adhesive layer through the adhesive interface The impact analysis brought up the problem of "weak interface" of structural bonding. At the same time, full consideration must be given to the aging and long-term stability of the adhesive joints. Professor Yi is a big name on Bonding Day, and many guests admire his knowledge. The students spoke enthusiastically and asked questions, and the interactions on stage and off were frequent and exciting.

Chief Han, a professor-level senior engineer of CRRC Sifang Co., Ltd., scientist and chief process engineer of CRRC China, gave a speech entitled: Construction and implementation of bonding quality system based on the integration of "five modernizations". Chief Han introduced the application of bonding technology in the rail transit industry, analyzed the salient features of bonding technology, and put forward the importance of comprehensive bonding quality system assurance. The three major construction ideas for bonding quality assurance were shared. The first is a standardized, refined, normalized, informatized, and integrated bonding system management and control method. The second is to build a bonding process planning, verification, design and element control method. The third is to build a multi-factor, multi-dimensional, and full-life bonding quality evaluation system for trains. The bonding quality system has now been implemented on more than 35 rail transit projects, and has significantly improved process preparation.

Fang Dan, R&D engineer of Yifa Bonding & Composites Research Institute, shared: Adhesion and composite design verification and service life evaluation. Through the analysis of the stress and strain of the bonded joints, combined with the actual working conditions of the joints, Fang Gong establishes an accelerated aging plan. The neural network algorithm can more accurately predict the long-term service life of the adhesive under this actual working condition. Fang Gong Through actual cases of composite structure design and verification, the entire composite research and development process, including composite structure design, test methods, simulation calculations, model design and production, is introduced in detail. Yifa has relevant project experience in bonding and composite design verification and service life assessment.

Zhang Xingcheng, a senior engineer at Bostik, gave a speech on Bostik’s intelligent solutions. Zhang Gong introduced that Bost glue is widely used in the rail transit industry. It has always been safe, durable, environmentally friendly and efficient. Based on this feature, Zhang Gong introduced Bost's second generation GCR series elastic glue GCR-6101. Bostik's new generation structural bonding technology includes two-component polyurethane glue, acrylic glue, rubber-based epoxy, etc. that can be used for lightweight structural bonding. Bostik is also widely used in the new energy market. It can be used in new energy battery assembly as a bonding and sealing material with excellent thermal management properties. As a major adhesive manufacturer, the quality can be expected!

Shao Dachun, Sales Director of Pursma, shared the topic: Plasma coating technology enables primer-free bonding process. Mr. Shao introduced the principles and uses of plasma treatment, and shared typical application cases of plasma cleaning and activation. As the world's leading plasma equipment manufacturer, Plasma uses Openair-Plasma® atmospheric pressure plasma coating technology to replace the conventional primer process, thereby solving the bonding difficulties between different materials and the environmental protection pressure on the application end.

Chen Jinzhong, R&D engineer of Yifa Bonding and Composite Materials Research Institute. Chen Gong is an expert in bonding simulation at Yifa. He shared: Finite element analysis method of adhesive joints. The basic principles of finite element analysis and the finite element analysis process of bonded joints are introduced, from modeling, establishing adhesive layer models, setting material parameters, setting boundary conditions, meshing, running solutions to post-processing, through elastic cab bonding Structural finite element simulation and rail vehicle headlight bonding simulation analysis cases fully demonstrate the entire process, results and precautions of simulation analysis.

Dr. Tang Juan, director of the Xinchuang Carbon Valley Composite Materials R&D Center, has more than ten years of experience in the research and development of composite materials and polymer materials. The title of today’s speech is: Application of pultrusion technology in the field of rail transit and research on fabric pultrusion technology. In recent years, the demand for high performance and lightweight material systems in wind power blades, rail transit, automobiles, aerospace and other fields has gradually increased. However, high-performance fiber composite materials represented by carbon fiber have shortcomings in molding technology such as low efficiency and high cost, which hinders large-scale and batch application. This time Dr. Tang introduced the key technologies and process flows of carbon fiber pultrusion, and shared multiple application cases of rail transit fabric pultrusion technology.

Dr. Xu Xiongli, a senior lecturer at the Yifa Bonding & Composites Research Institute, is also the auditor of Yifa EN17460/DIN6701 and ISO21368/DIN2304. He and another auditor of Yifa summarized the results based on extensive audits. : Document requirements for bonding operations and common issues in audits. Dr. Xu first introduced the changes in the requirements for work instructions, process planning and process verification in the new bonding standard EN17460 for new manufacturing, accompanying samples, and return operations. Secondly, he shared common problems during the review process of work instructions, focusing on It was pointed out that in the process of writing work instructions, the documents must be checked according to actual production, the 7C principle must be implemented, and updated in a timely manner.

The final speech of this conference came from Zhao Gong, a professor-level senior engineer of Datong Electric Locomotive Co., Ltd. Zhao Gong shared with everyone the topic: Research on the bonding surface treatment method of the locomotive cab floor and the optimization design of the bonding structure. Zhao Gong conducted an in-depth discussion on the research on bonding surface treatment methods from five aspects: bonding structure, bonding process verification, laboratory testing, surface treatment selection and bonding verification process. Zhao Gong's driver's cab floor bonding is a case study, which details the optimized design of the dismantled beams and the fully assembled driver's cab floor under the premise of interchangeable installation structures, achieving one-time bonding of the driver's cab floor cloth. , solving a series of problems that arise during the bonding process.

During the entire conference, experts from different industries and fields shared their technical experience in bonding and composite materials. The exchanges were lively and there were frequent interactions on and off the stage. It was truly a great collision of thinking and a great update of knowledge, which truly reflected the The platform communication function of "Bonding Day".

Around the venue, the booths were crowded with people. Technical experts exchanged opinions on some problems encountered in actual production, and some new products were quickly recognized.

Zhongyuan Silande has brought "rail transit bonding, sealing and assembly solutions" this time, which can meet almost all glue requirements for rail transit vehicles. Including floor cloth adhesive, special adhesive, elastic adhesive, shock-absorbing and damping adhesive, sealant, etc., these are mature products. The products cover several major series such as polysulfide, silicone, butyl, epoxy, polyurethane, and film, and are widely used in automobiles, solar energy, LED, rail transit, military industry and other fields.

As a high-quality adhesive supplier in the rail transit industry, BOSS not only brings their world-beating series of "3, 5, 8" SMP adhesives and more cost-effective GCR series products, but also MMA's SAF series, GPU series of products as well as wide gap bonding products.

In addition, Pursima, Kruse, Viotong, Tasting Testing, Deyucheng and Beidou Instruments are sponsors. They all sent the company's technical experts. They had in-depth exchanges with the on-site students and fully introduced and demonstrated its products and the company’s professional and technical capabilities.

The "Bonding Day" conference serves as a technology exchange platform. Once new technologies appear, they can be directly captured by technicians and quickly applied to new designs, greatly reducing market search time. For suppliers, it also saves a lot of marketing expenses and time costs. The information sharing of "Bonding Day" is direct, fast and can be verified at any time. These are the charm of "Bonding Day".

Time flies, and the two-day compact "Bonding Day" conference slowly came to an end with the closing report of Dr. Zhang Jingfen of Yifa. See you all next year!