Remanufacturing is mainly divided into five links: engineering machinery dismantling, engineering machinery parts cleaning, engineering machinery parts testing and life evaluation, engineering machinery parts repair and remanufacturing, and engineering machinery parts assembly. It is worth mentioning that the mature remanufacturing process uses scientific techniques at each stage to ensure the quality and performance of the final remanufactured product. Take only the two most important steps in the remanufacturing process as an example. In the inspection and life assessment of engineering machinery parts, remanufacturing companies use metal magnetic memory technology for the exploration of residual life assessment of used parts. The technology is based on the magnetostrictive effect of ferromagnetic materials. The ferromagnetic material in the geomagnetic environment has the characteristics of magnetic domain structure and spontaneous magnetization. When an external force acts on the ferromagnetic material, the magnetic domain changes in the material, and the change will leak. The form of the magnetic field is "memorized" and remains after the external force is removed. Through the detection of the "memory" content, stress concentration and macro-micro cracks can be known, and early damage diagnosis and life assessment can be realized. In the repair and remanufacturing of engineering machinery parts, the remanufacturing company will repair and remanufacture the used parts, and carry out related tests and upgrades to meet the performance requirements. In this process, surface engineering technology (including nano surface engineering technology and automated surface engineering technology) is the core technology. The remanufacturing industry is in line with the national 12th Five-Year Development Plan Since the end of the last century, China has seen the concept of “remanufacturing†in 1999. The government has paid attention to the remanufacturing industry every year. In 2005, the State Council issued the "Notice on Doing a Good Job in the Construction of a Saving Society in the Near Future" and the "Several Opinions of the State Council on Accelerating the Development of Circular Economy" all pointed out: "Supporting the remanufacturing of used mechanical and electrical products". In the "Eleventh Five-Year Plan" The Outline clearly requires vigorous development of remanufacturing. In the "12th Five-Year Plan for Energy Conservation and Environmental Protection Industry Development" issued by the State Council last year, eight key projects in the field of energy conservation and environmental protection, such as major energy-saving technologies and equipment industrialization, seawater desalination industrial base construction, and energy conservation and environmental protection service industry, were delineated. One of them is the remanufacturing industrialization project, supporting the remanufacturing of auto parts, engineering machinery, machine tools, etc., improving the remanufactured old parts recycling system, focusing on supporting the establishment of 5-10 national remanufacturing industry clusters and a number of major demonstrations. project. From an objective point of view, with the acceleration of China's industrialization process and the improvement of people's living standards, the mechanical and electrical products manufacturing industry has developed rapidly, and a large number of used mechanical and electrical products will also be produced, which has created conditions for the development of the remanufacturing industry. According to the latest statistics of China Construction Machinery Industry Association, the current domestic construction machinery market has more than 5 million units. By 2015, the annual sales volume of construction machinery will reach 1 million units. According to the life cycle of mechanical equipment, it is estimated that by 2020, the annual number of construction machinery scrapped is expected to reach 1.2 million units. In addition, in terms of single parts of mechanical equipment, engineering machinery parts have high unit value and great repair value. These internal factors will drive the remanufacturing industry to develop in China. As the market share of domestic construction machinery continues to grow, more and more machinery will need to be remanufactured. In addition, the state's attention and support for the construction machinery remanufacturing industry, many supporting policies and regulations will be introduced one after another, and international exchanges will further enhance the remanufacturing technology of China's construction machinery enterprises, when China will truly become the world One of the most important remanufacturing centers. As the world's largest construction machinery quantity retention country, China's construction machinery remanufacturing industry market potential is immeasurable.
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