China is the world's largest importer of timber, and its dependence on imported timber is about 30%. The output of Chinese logs and sawn timber has been growing steadily, and the dependence of Chinese wood on foreign ownership will gradually decrease. China imports about 40 million m 3 of wood from abroad every year, and about 75% of it is logs. Figure 1 Domestic log sawn timber (10000m 3 ) According to incomplete statistics, the annual value of PCD tools processed by wood in the world is 40-500 million US dollars, and will increase by 15%-20% every year in the future. Wood processing will be the fastest growing area of ​​diamond tool usage. The European wood processing industry uses the largest amount of PCD tools and is the most popular. In Japan, wood-based materials are one of the important materials for house materials, and natural wood resources in Japan are limited. Therefore, the development of wood-based composite materials is highly valued. Wood-based panels account for 60% of the wood-based materials market. For example, composite ceramic fiberboard, which has the advantages of corrosion resistance, fireproofing, heat insulation, and easy-to-engraving decorative patterns, has quickly become one of the popular building materials in Japan. Chukgo began producing PCD woodworking tools in about 1983. According to the company, the annual output value of PCD tools used in processing composite ceramic fiberboards in Japan is about 1.5 billion yen. In the early 1980s, Italian Metal World began trial production of PCD woodworking tools, including diamond saw blades, various tools and Drill Bits. In 1991, the company launched the Ø5mmPCD woodworking twist drill, which was the first successful PCD drilling for woodworking. It is also the latest development of diamond in woodworking tool manufacturing technology. This drill can drill 100,000 holes continuously on the melamine layer particle board without trimming. It has the advantages of fast drilling speed and good reactivity of cutting stress, and is especially suitable for use on CNC Drilling Machines. From the perspective of raw wood, China's timber is in short supply and wasteful. The data show that the comprehensive utilization rate of wood in China is less than 60%, and the country has listed wood processing as a key support industry. At present, there are more than 6,000 Chinese wood-based panel production enterprises, mainly small and medium-sized enterprises. It is the world's largest producer, consumer, import and export trade. According to the forecast of the UN Food and Agriculture Organization, the total output and consumption of wood-based panels in the world will reach 255 million m3 in 2010, and more than one-third of the contribution comes from China. Figure 2 Production and growth rate of wood-based panels (10000m 3 ) The future development of wood processing industry in China is focused on improving the quality of finished materials, the pass rate and the yield rate, and the development of deep processing, fine processing in the wood industry, such as sawing and planing. High precision, high wear resistance, standardization and generalization requirements are proposed for woodworking tools. According to statistics, there are more than 360 wooden product production lines that have been introduced in China, and the tools of these production lines are mostly made of cemented carbide. Obviously, this is another potential huge market. In short, a large number of research and production facts tell us that the superiority of diamond integrated technology, the importance of theoretical research value, the wide range of applications, the significant technological and economic benefits achieved, and the transformation of difficult-to-machine metal and non-metal materials processing technologies. The role is big, it is unmatched by other materials. It can be predicted that with the rapid development of modern industry and science and technology, the development prospects of the diamond industry are colorful.
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