Chapter 409： Successful (on)

When Professor Wang hurriedly ended the research at hand, Guo Tailai had only the last two sub-systems assembled. Or the second brother to accompany, with the latest test system rushed out, ready to install to lotdm. ratio

The system that the Americans made in the past 16 years, according to Guo Tailai's design, the processing size is one-third larger than the American one, and the processing weight is also increased accordingly. Processing accuracy has increased slightly, from twenty nanometers in the Americans to fifteen nanometers in the design.

The biggest change is the control system. The Americans completed in 1984, and said nothing, the cpu chip will still stay in the eight-bit sixteen stage, compared with the present, it is simply not the same. The control efficiency is not said. The operation is also automatic digital control processing after the workpiece is fixed. It is not known how many times advanced. king

They also had time to catch up with Guo Tailai’s final assembly completion. Er brother has graduated after completing the control system of the small machine tool of Guo Tailai Studio, but he did not immediately find a job to leave school after graduation, but continued to work with Professor Wang to develop the operating system of this lodtm. . Seeing the meaning of the second brother, the possibility of staying in school is great.

The console can be seen in another room with three layers of hollow insulating glass separated by two anti-vibration grooves. The machine operation on that side can be seen, but it is not because the temperature of the body affects the operation room. In fact, from the console this room can not directly enter the operation room, first go out two doors, walk another channel on a common entrance, take three doors to enter the processing area.

Everything in the factory is designed to minimize the impact of the outside world. This is true whether it is vibration or temperature.

This lodtm is designed to process workpieces with a diameter of 2000 mm and a height of 600 mm. With such a large size, the expansion coefficient of optical glass is about 3.3 microns per meter, that is, the temperature changes once and the diameter is two meters. The workpiece size will vary by 6.6 microns. The design and processing accuracy of this system is fifteen nanometers, that is to say, the change of each degree Celsius is 440 times of the processing precision. This also means that the temperature change during processing must never exceed 0.002 degrees. This

The requirements for a constant temperature system are simply to the extreme. This is a constant temperature system, and the order is over 100 million. And before starting the processing, after fixing the workpiece, I am afraid that everyone has to exit the processing area, waiting at least 12 hours before starting processing, so that the temperature difference caused by the body stay will affect the processing accuracy.

The test system has been installed and Guo Tailai has completed all the assembly work. In the case where the temperature influence is not fully considered, a test process is performed first. This time it's just a test function, not a test accuracy.

In the past, if you wanted to process optical glass in China, you could only use the grinding method. Most industrial workers can't even imagine the way optical glass is used to process it. It's incredible. Measurement

Trial processing, just the simplest turning operation, everyone stood nervously in the console room, watching the huge diamond lathe behind several layers of hollow insulating glass began to process, dazzling action even Guo Tailai looked excited . because

For the test processing, simple operation, it is completed very quickly. Guo Tailai couldn't wait to open several doors and enter the processing area. Although Guo Tailai can already see the size of the machine far away, it is still necessary to take a closer look at the state of the workpiece after the machining is completed. test

The size of the workpiece is not large. The processing data is set to an integer diameter of one hundred millimeters. When you look at the console room, the number is basically unchanged. After all, it is a constant temperature. But when Guo Tailai and others entered it, or just opened the last door, Guo Tailai saw that the size of the diameter slightly changed by a very small number. machine

The micro-measurement system that comes with the bed itself also gives readings, which also vary slightly. This kind of measurement tool that uses laser interference fringes to amplify the read length, the data given at this moment is almost identical to what Guo Tailai visually observed. Of course, Guo Tailai has one more reading than the measuring system and changes more frequently. Do

This time, the test is only to test the machining process, not to test the machining accuracy. It has not undergone such a strict temperature control prelude. Even so, the glass cylinder that was processed is enough to surprise Professor Wang. For the first time, the test results are not strictly tested. The results of several measurements are even higher than those of the ultra-large-format five-axis CNC machining center. If it is processed strictly according to the operating rules, what will be the result?

In the second test, the accuracy test was started. However, this time the test was not as simple as Professor Wang’s team plus Guo Tailai. There were a few more people who came to the site to pay attention. In this strict military management area, there are certain levels that can come in. Guo Tailai even saw the official in the Ministry of Technology at the time of the last technical verification.

This time processing is a convex lens, and the strictly calculated surface is realized by CNC. Before the start of processing, the optical glass workpiece had been placed in the processing area for a full twenty hours before the people came to observe it. Place

Someone is there, and is strictly restricted to move, can only sit in the seat to watch. There are also two anti-vibration grooves between the console and the processing area, but the slight ground vibrations when people walk around may still have an impact, so avoid this as much as possible.

When the various state readings in the processing area were completely normal, under the command of Professor Wang, the second brother started the processing process, and the precision diamond lathe began the first strict and regular processing operation.

A large amount of constant temperature liquid covers the machined surface, and even Guo Tailai can't see the dimensional change at the moment. However, the system's precise readings are displayed on the screen in front of the console, stable and precise changes, and processed to the set size little by little.

After the processing is completed, when all the constant temperature liquids are clean and the exposed workpiece body is exposed, Guo Tailai looks far away and has a long breath. The processing dimensions are fully qualified and the precision meets the design requirements.

When the workpiece was carefully moved to the measuring room, and the constant temperature was continued for several hours to measure the result, Professor Wang’s face finally showed a satisfactory smile. "

Successful! "The extraordinary power of the big country, when the test was perfect, Professor Wang's mouth only had this faint word."

Everyone's face is a smile, but everyone is forced to suppress their own cheers, for fear that a large sound will affect the measurement results there. But everyone has only three words at the moment, and it is a success!