1. Overview of Development <br> <br> precision and ultra-precision processing technology, a direct impact on the development of cutting-edge technology and national defense industry, so countries have attached great importance to this world, has devoted itself to research and development, and implementation of technological security Control the export of key processing technologies and equipment. With the rapid development of aerospace, high-precision instrumentation, inertial navigation platforms, optics and laser technology and a wide range of applications, processing of high-precision complex parts, optical parts, high-precision planes, surfaces and complex shapes Demand is increasingly urgent. At present, a variety of precision and ultra-precision turning, grinding, polishing and other machine tools have been developed abroad, and new precision machining and precision measurement technologies have been developed.
China is now a "manufacturing power", and its manufacturing scale ranks fourth in the world, second only to the United States, Japan and Germany. In recent years, it has made great progress in precision machining technology and precision machine tool equipment manufacturing. However, China is still not a "manufacturing power", and there is still a big gap compared with developed countries. Although China has a large number of mechanical and electrical products exported each year, most of them are low-end products with low technology content and relatively low price. Most imported from abroad are high-end products with high technical content and high price. At present, China needs to import a large number of precision CNC machine tools and instruments that cannot be produced in China every year. For example, in 2003, China imported machine tools worth US$4.16 billion, while the export machine tools were only 380 million US dollars, mainly for low-precision ordinary machine tools. In 2004, China imported machine tools of 5.78 billion US dollars and exported machine tools only 520 million US dollars. In 2005, the total output value of China's machine tools was about 5 billion US dollars, and the export machine tools were 800 million US dollars, while the imported machine tools reached 6.7 billion US dollars.
Due to the important embargo embargo imposed on China by some important high-precision machine tools and instruments from abroad, these precision equipments are urgently needed for the development of national defense industry and cutting-edge technology in China. Therefore, in order to prevent China’s national defense and technological development from being controlled, We must invest the necessary manpower and material resources to independently develop precision and ultra-precision processing technology, and strive to upgrade China's precision and ultra-precision processing technology to the world's advanced level as soon as possible. The following is a brief introduction to the latest developments in precision and ultra-precision machining technology at home and abroad.
2. Precision machine tool technology development <br> <br> precision machine tools is the basis for precision machining. The development direction of today's precision machine tool technology is: on the basis of continuing to improve the accuracy, high-speed cutting is used to improve the processing efficiency, and advanced CNC technology is used to improve its automation level. Swiss DIXI is famous for producing horizontal coordinate boring machines. The DHP40 high-precision horizontal high-speed boring machine produced by the company has added a multi-axis CNC system to become a machining center. At the same time, the highest spindle of the machine tool has been achieved for high-speed cutting. The speed is increased to 24000r/min. The high-speed precision five-axis machining center of MIKROM in Switzerland has a spindle speed of 42000r/min and a positioning accuracy of 5μm, which has reached the accuracy of the past coordinate boring machine. As can be seen from the performance of these two machines, there is no longer a strict boundary between the current machining center and the high-speed cutting machine.
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Diamond cutting piece is a widely used in stone, concrete, precast board, new and old roads, ceramics and other hard brittle materials processing.
Diamond cutting pieces are mainly composed of two parts; Matrix and cutter head,
The matrix is the main support part of the bonding tool head, and the tool head is the cutting part in the process of use.
The tool head will be constantly consumed in use, while the matrix will not. The reason why the tool head can play a cutting role is that it contains diamond. Diamond, as the hardest material at present, cuts the processed object by friction in the tool head, while diamond particles are wrapped in metal inside the tool head.
According to the shape of the knife head, there are different effects:
1. Continuous edge Saw Blade: continuous saw diamond cutting blade, generally made by sintering method, water must be added when cutting to ensure the cutting effect, and the type of gap will be cut by laser.
2, knife head cutting piece: serrated disconnect, cutting speed, suitable for dry and wet cutting methods.
3, corrugated cutting piece: combined with the advantages of the first 1, 2, serrated continuous corrugated uniform convex and concave, improve the cutting speed, increase the service life.
Cutting Wheel,Diamond Disk Marble,10 Cut Off Wheel,Aluminum Oxide Cutting Wheel
Henan Jinlun Superhard Material Co., Ltd , https://www.jinlunsuperhard.com