Chapter 879 Wrong Direction
The symposium is just to gather the project team and clarify the direction of the next task.
So it didn't last long.
The remaining task is research and development.
However, there is still a lot of work to be done in order to transform the theory, which is still imperfect at present, into practice.
It’s not the same level of workload as writing a thesis.
This is why Chang Haonan must send people from so many units to support——
High-power picosecond lasers are readily available from Haojing Optical Machinery, but if the entire laser processing If the equipment is compared to a machine tool, then the laser is only equivalent to the tool head on the machine tool.
A series of auxiliary equipment are also needed to control the accurate and efficient operation of this "light knife".
There are specialties in the art industry, and many of the contents involved are things that Chang Haonan has never been exposed to.
Therefore, similar to when designing Turbofan 10, after the symposium, the entire project team was divided into three different directions.
The first direction is led by Chang Haonan himself, who is responsible for further improving the ablation threshold model.
Even though machining has been developed as a formal discipline for at least two centuries, a vast amount of production data has been accumulated during this process, so empiricism can play a huge role in it. role.
However, laser processing obviously cannot wait for two centuries.
Not even twenty years.
Therefore, it is impossible to have enough experience to draw from.
In order to put it into production in a short time, it is necessary to be able to reverse, at least partially, the entire process flow when the materials to be processed and the expected processing results are known.
The second direction is led by Academician Hou Xun, who is responsible for the research and development of the entire laser processing equipment hardware level, as well as providing necessary experimental data support for the first direction.
The Haojing Institute of Optics and Mechanics has been working on this field for many years and has accumulated a certain amount of technology.
However, Chang Haonan put forward an additional requirement, that is, not only the laser source itself, but also the parts related to the machine tool processing characteristics need to be made in China.
On the contrary, for motors and lens groups, if the progress is indeed too late, the requirements can be relaxed appropriately.
Judging from the current international situation, China does not need to worry about being stuck in the short term.
The main thing is to cooperate with the bait thrown out before.
Otherwise, he was as fierce as a tiger in that one moment, but when others checked, they found that you had bought a bunch of local volume holographic gratings that matched the pulse laser.
That would be pure fun...
As for the third direction, there is no leader for the time being.
Because strictly speaking, this is not "one" direction.
Instead, it is responsible for ensuring the various materials needed in the manufacturing and use of equipment, ranging from radioactive isotopes to cable and fiber optic lubricants.
Their progress will be reported to Lan Xinzhi of the Equipment Industry Department of the Science and Technology Commission, who will then coordinate with Chang Haonan...
As instructions and documents follow one after another, Chang Haonan signed out in his writing, and the newly formed R&D team gradually began to operate.
Although these members from different systems are not yet able to cooperate as seamlessly as the Turbofan 10 project team, it is not a bad thing to start running in early.
Race against time!
……
At the same time as Chang Haonan was preparing to launch the project.
UK, Southern England, Oxfordshire.
Rutherford Appleton Laboratory.
Professor Martin Bock is sitting around a semicircular conference table with several corporate technical representatives from Oxford Laser Company and Edinburgh Instrument Company.
At this time, everyone’s eyes were focused on a curtain on the wall of the conference room.
What is displayed on the curtain is the paper Chang Haonan published not long ago, as well as some related experimental data.
Professor Bock’s student and assistant Emily Toulson stood behind the podium not far away, controlling the speed of the PPT playback, and occasionally making some necessary additions to the specific experimental situations.
James Cambert from Edinburgh Instruments spoke first:
“Matt, we have received reports from several institutes and laboratories, all stating that they can reproduce the results in Professor Chang’s paper. Experimental results, but because the calculation process involved is relatively complex, it is still difficult to generalize the same method. "
"So, the current common concern in the industry is that this. Is the transient thermoelastic model proposed by Professor Wei Chang universal, or can it only achieve good fitting within a limited range? "
In fact, once Chang Haonan's article was published, In addition to a huge amount of attention, there are also continuous doubts.
Although the voices of doubt are not large, they all come from industry insiders who study related fields.
Because the model proposed by Chang Haonan is indeed a bit too complicated for most engineering scholars who lack theoretical mathematical foundation.
At least not to the extent that you can get the result by simply adding parameters. So that for the time being, everyone can only use the dozens of data mentioned in Chang Haonan's paper to conduct repeated experiments -
Other data cannot even be calculated, let alone mentioned. What verified.
Of course it doesn’t matter to the masses, but for companies that hope to commercialize laser processing technology, the risks involved cannot be ignored.
Therefore, two companies that already had a cooperative relationship approached Professor Bock and asked him to verify the authenticity of the paper.
Of course not the data.
But the model.
“It’s normal that most people can’t understand.”
Martin Bock showed a confident expression on his face:
“The calculation process in that paper is not very easy to understand even for ordinary scholars with a background in mathematics.”
“However, thanks to the assistance of supercomputers, I have cracked the code contained in it. Pattern..."
He said and gestured to the side.
Immediately afterwards, Turson switched the PPT on the curtain to the next page.
The above is half of the formula calculation, and an image drawn with dense curves and data points:
"Although we still don't know the specific derivation process of Professor Chang, we can be sure that within the energy, wavelength and time scale we usually study, the transient thermoelastic model he proposed can basically fit the experimental data. The largest error is only about 5%. "
"In other words, mathematical means can really be used to calculate the thermal processing of the molecules on the surface of the material, and the accuracy is satisfactory. The demand for industrial production?”
Although he received a positive answer from Professor Bock, Cambert still had an expression of disbelief on his face.
Thomas Linton, the representative of Oxford Laser Company who had been sitting next to him, did not speak, but he also frowned slightly.
As a high-tech enterprise, they have naturally heard of molecular dynamics simulation, which has been very popular in the past two years, and have even invested in many research groups doing related research.
But this kind of investment is an attempt to flood the market, which does not mean that they are really optimistic about this field.
In fact, most companies believe that it is unlikely to accurately apply numerical calculation methods to the field of microscopic particles, at least within 8-10 years.
On the one hand, it is the insufficient level of computer hardware, and on the other hand, it is also the limitation of mathematical theory.
But the paper in front of them and Professor Bock's conclusion clearly slapped them in the face.
Perhaps seeing the shock of the two business representatives, Bock paused for a while and then explained:
"I went to check it out. In addition to being the co-prover of the Poincaré conjecture, Professor Chang Haonan is also the developer of TORC Multiphysics, a very influential numerical calculation software in recent years."
"So, it's not surprising that he can perform at a level far beyond ordinary people in this interdisciplinary field."
"But..."
Linton hesitated for a moment, but continued. Said:
“With such a guiding model, why not start commercialization immediately?”
As a business executive, his first concern is money.
“Because theory is theory, it is not that easy to commercialize.”
Bock replied:
“To truly realize continuous laser processing perfectly, it is necessary to The requirements for processing equipment and control systems are very demanding. The laser source needs to have five spatial degrees of freedom. In addition to the laser power and beam quality, there are at least 7-8 parameters that need to be controlled simultaneously. ”
“This. Even in the field of machining, it is an extremely complex system, not to mention maintaining the stability of the optical path itself while controlling it. The difficulty is almost equivalent to using photolithography to produce semiconductors. ”
This analogy finally gave Linton and Campbell a somewhat intuitive concept.
“I speculate that if the processing object is changed from anisotropic carbon fiber composite to metal, the situation may improve a little, but not too much.”
Speaking of which, He signaled Turson to turn the page again:
This time it was a somewhat dazzling table.
“Look, you two, the red data in this table was written in that paper for fitting, while the blue data was fitted after I generalized the calculations.”
The former wanted to sell it off, but seeing that the two representatives didn’t seem interested, he had to give up the idea and explained directly:
“It can be seen that the parameters used for fitting in the paper are very complex. They are not high, and there is almost no pattern in the selection of points, which shows that they do not have the ability to control the laser source for high-complexity precision processing even in the laboratory, let alone the industrialization stage.”
This explanation is considered reasonable and well-founded.
"So...since the Chinese can't do it, can we at our level..."
Professor Bock has been waiting for this question for a long time, so he only heard half of it. Expressed his position:
"It can be done in the laboratory."
He pointed at the curtain in front:
"The complexity of the blue data in the table is close to that of actual industrial production. The demand is there, but the success rate is not yet stable. However, we are currently trying to use technology in the field of semiconductor processing to improve the equipment. If there are sufficient funds and manpower, we should be able to see some results soon.”
< br>Looking at Professor Bock who was full of confidence, Linton and Campbell looked at each other, and they both read the meaning of "you can give it a try" from each other's eyes.
"So, Professor Bock."
Oxford Laser Company took the lead in this cooperation, so Thomas Linton stood up as the final word and came to Bock:
"We will provide you with the maximum support within our authority, and I wish you the best. Success as soon as possible!"
Martin Bock smiled and stood up and shook Linton's hand:
"Probably, I wish us success as soon as possible..."
(End of Chapter)