A closer look at the history of high-speed rail: a leap from technical Xi to independent innovation.
China's high-speed rail scenery is infinite, but a small nut has become a key bottleneckIn this article, we'll reveal the twists and turns of China's high-speed rail development and why a tiny nut from Japan once mattered.
There is no need to worry about traveling thousands of miles, and the high-speed rail is speeding bullets. Don't complain about the hard way to the sky, and the train roars across China. ”
On China's road to poverty alleviation and prosperity, "if you want to get rich, you must first build roads" is the valuable experience of countless Chinese people. As the main artery of the country's economic and cultural development, transportation plays an immeasurable role in poverty alleviation and prosperity. After more than 40 years of continuous struggle, China has built a transportation system that connects east and west, north and south, and initially formed a national comprehensive three-dimensional transportation network of "six axes, seven corridors and eight channels".
Among the many modes of transportation, high-speed rail has become a major achievement in China in recent years, and has been praised by countries around the world as one of China's "new four major inventions". China has built the world's most modern railway network and the most developed high-speed rail network. In the past 20 years, China's high-speed rail technology has flourished, and it is also the strongest 20 years of China's economy. The rapid development of high-speed rail technology has long allowed China to occupy a leading position on the world stage.
High-speed rail technology reflects the strength of the country, in the more than 20 years of China's high-speed rail construction, we have Xi from the beginning, the introduction of Japanese and German technology, to independent research and development and innovation, all the way to catch up, and then catch up. Hundreds of millions of people have felt the unique "Chinese speed" in the changes of the times in the construction of high-speed rail, and have also reaped fruitful results on the road of steady and rapid development and prosperity of high-speed rail.
However, behind the "scenery" of China's high-speed rail, it was once controlled by others and had to rely on foreign products. Just like the pain of "lack of core" that Chinese people are familiar with, China has always been handy in the manufacture of large-scale industrial and scientific and technological products, but it is often controlled by others in the "minutiae" such as cutting-edge technology and precision devices, such as the much-criticized domestic engines, domestic chips and other problems. In the development of China's high-speed rail, this is reflected in the need for China to import a large number of nuts made in Japan.
Nuts, small but common parts, whether they are small toys and furniture, or large airplanes and rockets, can be seen everywhere. When the high-speed train is speeding on the track at a speed of hundreds of kilometers per hour, the vibrations generated are enormous. In order to keep the screws stable in each position, they must be tightly connected with nuts. In the development of China's high-speed rail, the nuts that used to need to be imported in large quantities were hard lock nuts from Japan.
The Hard Lock nut, known as the "never loose" nut, is one of the most stable nuts in the world. This technology was developed in 1961 by Hardlock Corporation of Japan. Its founder, Katsuhiko Wakabayashi, invented this nut that "never loosens" after continuous research, inspired by the tenon of ancient wooden buildings. By driving nails into the gaps between nuts and screws, the Hard Lock nut avoids the common loosening phenomenon and becomes a product trusted by Japanese railway companies.
The structure of this nut is very simple, essentially a wedge is inserted between the nut and the screw to prevent loosening. In order for the nut to function as a wedge at the same time, two types of nuts are used in the shape of "concave" and "convex" on the screw. The nut with a convex shape at the bottom can be used as a wedge when the center is slightly staggered during machining. The nut with a concave shape at the top is not off-center processed, forming the function of a hammer net to hit the wedge. The combination of two such nuts into one solves the problem of loosening.
After the successful launch of the hard lock nut, it has been widely used in high-speed rail. At that time, Japan was a pioneer in the development of high-speed rail, leading the world in various technical aspects. Therefore, the hard lock nut has naturally become a necessity for the construction of high-speed rail in various countries. It is not only imported in large quantities by China, the United Kingdom, South Korea and other countries, but also widely used in the construction of large-scale scientific stations in the United States and other countries.
However, this does not mean that China has been stuck in a situation of relying on imported hard lock nuts. In August 2015, China's self-produced self-tightening nuts were officially unveiled in Shenzhen. This kind of nut only needs one nut and one washer, which can solve all the problems, and has reached the first-class level in terms of material and technology. Compared with the hard lock nut, the self-tightening nut performs better in terms of safety, because the nut contains an active self-tightening force, which produces a greater reverse self-tightening force when rotated, which is very strong and does not loosen. The advent of self-tightening nuts has promoted the research and development of precision devices in China.
In today's era of economic globalization, the economies of various countries are becoming closer and closer, and the interconnection of commodities and technology has long become an inexhaustible driving force for the development of various civilizations. From the atomic bomb at the beginning of the founding of the People's Republic of China to today's small nut, China has been learning from the outstanding cultural achievements of other countries Xi, and gradually moved from dependence to independence, from weak to strong. Today, China has a large number of companies and technology workers who focus on independent research and development, including Huawei, and they are ready to develop in their respective fields. I believe that in the near future, we will be able to make greater breakthroughs in various key fields.
The article delves into the technical problems faced in the development of China's high-speed railway, as well as the key role of the hard lock nut from Japan in this process. This article not only conveys the gratifying achievements of scientific and technological development, but also reflects China's efforts and progress in independent research and development of technology.
First of all, the article successfully presents the relationship between transportation and national development by citing the experience of China's poverty alleviation and prosperity, which is the summary of China's experience in poverty alleviation and prosperity. In particular, the emergence of high-speed rail has not only improved transportation efficiency, but also created good conditions for people in the vast areas to get rid of poverty and become rich. The article highlights the vigorous development of China's high-speed rail in the past few decades, so that readers can have an intuitive and profound understanding of the magnificent process of China's modern transportation construction.
Second, through the description of the technological development of high-speed rail, the article cleverly introduces the problem that China once relied on Japanese hard lock nuts. The existence of this technical bottleneck makes us need to import a large number of nuts made in Japan during the construction of high-speed rail, reflecting the relative lag of China's technology in some fields. The existence of this problem has not only triggered domestic reflection, but also prompted China to catch up in independent innovation in science and technology and no longer be controlled by others.
By explaining the development of the hard lock nut, the article vividly demonstrates Japan's innovative strength in the high-tech field. Through the unremitting research and development of nut technology, Katsuhiko Wakabayashi finally succeeded in creating the "never loose" hard lock nut, becoming the leading giant of Japan's manufacturing industry. This process not only demonstrates the spirit of Japanese craftsmanship and the persistent pursuit of technology, but also shows us that China needs more independent innovation in the field of high-speed rail.
However, the article does not stop at revealing the problem, and what is more striking is China's rise in the field of technology. Since 2015, China's self-produced self-tightening nuts have been officially unveiled, which not only solves the problem of technical dependence, but also surpasses the hard lock nut in safety performance. This shift not only reflects China's great potential in technological innovation, but also demonstrates the tenacity and determination of Chinese companies in the process of catching up and surpassing.
Finally, in the context of a globalized economy, the paper emphasizes the close ties between the economies of various countries and the exchanges between civilizations. China has not only absorbed the advanced technology of other countries through Xi, but also made major breakthroughs in independent research and development. This is evident not only in high-speed rail technology, but also in other key areas of China's technological prowess.
In summary, this article profoundly analyzes the technical problems in the development of China's high-speed rail, highlights the country's progress in independent scientific and technological innovation, and also presents readers with China's rise in the field of science and technology. This process not only gives people a clearer understanding of China's scientific and technological strength, but also makes us full of expectations for the future development of science and technology.
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