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It is understood that this machine is only the size of the cash register. The staff put a metal molybdenum sphere into the processing head, and in just 5 minutes, a delicate spherical grid was formed. The machining accuracy is up to μ, which is equivalent to 1/70 of the hair. The biggest highlight is the five-axis linkage CNC system and fiber laser.
According to Lu Qijian, general manager of Nanjing Sikai Electronics, the five-axis linkage technology of the machine control part is the most difficult and widely used technology in numerical control technology. It is mainly used for efficient, precise and automated machining of complex surfaces. The processing part uses a fiber laser. Unlike a conventional carbon dioxide laser, it does not require high-purity carbon dioxide or the like as an excitation medium, but transmits the laser directly through an optical fiber, thereby making the beam quality more stable. The energy conversion efficiency of fiber lasers can reach 30%, much higher than that of CO2 lasers, and the cost per piece can be half that of CO2 laser cutting machines.
According to reports, this machine tool can also process medical devices such as cardiac stents with extremely high precision requirements, and can also be used in aerospace and defense fields. On November 4th, at the China International Industry Expo held in Shanghai, the on-site demonstration of Sikai Company attracted a batch of professional audiences, and the people who negotiated were in a constant stream. “The nephews are all dumb.â€
In 2008, the Nanjing Municipal Government invested 1 million yuan to select 10 high-tech enterprises in Nanjing to cooperate with Tsinghua University to conduct industry-university-research cooperation. The reason why Nanjing Sikai Electronics can be listed among them is that the high-end CNC system and five-axis linkage precision machine tools developed by the company with independent intellectual property rights have long been famous. In 2005, the company provided a high-speed engraving and milling machine for the 55th CLP Group to process a microwave device carrier with extremely high precision. This workpiece was once used in the Shenzhou series manned space flight. On the spaceship.
"We know that there are many advantages in the mechanical department of Tsinghua University, but there is no clear goal on how to dock. We told the experts and professors of the Department of Mechanical Engineering at Tsinghua University that they are interested in the research of laser technology for many years. We can link the laser technology with our five-axis linkage high-end CNC system, and jointly develop a five-axis linkage laser processing machine with international advanced level." Lu Qijian said.
After nearly a year of joint research, new products have been successfully launched. It is reported that the newly developed machine tool has been ordered by the 12th of the CLP Group, specializing in the processing of high-precision radar micro-workpieces urgently needed by China's aerospace industry, breaking the technological blockade of the western countries against China.
The success of the new machine tool has made Lu Qijian more confident in the next step of cooperation between the two parties. "The company is a long-term in terms of numerical control. Tsinghua University's laser technology is leading domestically. With such a good partner, of course, we must work together to develop more new products." Lu Qijian said that the company has started to develop laser three-dimensional cutting robots, which are high-speed robots. It is precise and flexible, and can work in a variety of harsh environments. "The hot pressing technology that can be widely used in automobile production has a very broad market."
Sikai Electronics and Tsinghua teamed up to overcome the difficulty of processing high-precision radar miniature workpieces
In the development of high-precision radar, a core micro-device is needed—a spherical grid made of metal molybdenum with a diameter of only 12 mm, and 72 trapezoidal grids in the grid. The “ribs†connected between the small grids are only 0.12 mm. Since the melting point of molybdenum is as high as 2000 °C, there is no processing equipment in China, and the countries that master this technology have imposed technical blockade on China. Therefore, the spherical grid network has become a bottleneck restricting the accuracy of radar. Recently, Tsinghua University and Nanjing Sikai Electronic Enterprise Co., Ltd. jointly solved this problem and successfully developed a five-axis linkage laser processing machine that can process the device.