And there are many such stories in China.

In Li Yifan's influence, the other most famous one is probably Professor Yao Chongshan from his hometown of Bincheng University of Technology.

Professor Yao is a professor in the School of Materials Engineering of Bincheng University of Technology, and in this year, he has just graduated with a doctorate, and it was during this time that he noticed a new discipline of 3D printing when he read foreign scientific research materials.

Professor Yao, who was a foundry major when he was an undergraduate, has a deep understanding of the domestic foundry industry and the backwardness of material science.

After graduating from his Ph.D., he once learned that if he wanted to create a world in the current domestic foundry industry, it was almost impossible to build on the basis of the current domestic materials science.

After all, if you want to make a breakthrough in the field of casting, then you must have a material alloy that can keep up with the international standard, and if you want to work material alloys, then there is no other shortcut except for decades and trillions of capital investment.

In this regard, whether it is time or capital investment, in the current domestic scientific research environment, it is simply impossible.

After all, we are not lagging behind foreign countries in the field of materials science, and if we want to keep up with the pace of foreign countries in this field, then we must find another way, and it is best to be able to overtake in detours.

It was at this time that he began to learn about the new process of 3D printing.

So from that time on, he began to contact some like-minded colleagues and began to form a team. Work this 3D printing jishu.

After ten years of uninterrupted efforts. He leads his team. Finally, it is the largest printer in Shijie, and it is also a printer at the leading level in Shijie.

And the most important thing is that he and his team have developed this printer, which can be used in the processing of metal castings.

Since the birth of 3D printing jishu, some people have asserted that this kind of jishu is just a gimmick. It simply cannot really replace the existing metalworking industry.

The reason is very simple, that is, because of modern metal processing, some special superhard metal alloys are often processed, and these metal alloys are processed into various mechanical parts that you need.

And such a function is exactly what 3D printing jishu does not have.

Because the basis of 3D printing jishu is to melt away different materials, and then pass these materials through a nozzle according to the settings of a computer program. It is sprayed out according to different movement trajectories, and then stacked layer by layer. Zuihou molding.

And the key lies in the melting of this material, the current melting material jishu, can not reach the point of melting superhard metal.

And even if you develop laser sintering, which uses a high-strength, high-temperature laser to melt metal, you still have to face a problem of quenching and annealing.

It is important to know that many super-hard special alloys will have several quenching or annealing processes during smelting and processing to ensure the characteristics of these metals after they are produced.

And these metal castings, in the subsequent processing process, once they are heated at high temperatures and melted, there will be annealing problems, even if you use cooling to solidify the metal again.

However, some of the characteristics unique to this metal, such as corrosion resistance, high temperature resistance, high strength, and high service life, will be lost with this annealing process.

As a result, 3D printing jishu is faced with the problem of changing the material properties when it is processed in metal.

For example, the special bearings used in high-speed rail trains need to be corrosion-resistant, high-temperature resistant, wear-resistant, durable and so on.

This requires the processing of this kind of bearing, the selection of specific and suitable special steel materials, and this special steel, after casting into a blank, can be put down on the machine tool for reduction processing, if the use of five-axis CNC center, it is likely to be processed at one time.

However, if you use 3D printing jishu, although it is more material and time-saving, but in the processing process, you must melt the blank material with laser sintering, and then spray and superimpose it according to a specific program.

And such a processed bearing, it is very likely that in the process of domestic work, because of the use of laser sintering, the special steel melts, resulting in the disappearance of some characteristics of this special steel, such as the characteristics of high strength, or the characteristics of corrosion resistance.

The disappearance of these characteristics will lead to the durability and life of the bearings processed by 3D printing jishu are greatly shortened compared with the bearings processed by machining methods.

In this way, it seems that the gains outweigh the losses!

And the most powerful thing about the 3D printing jishu developed by the team led by Professor Yao Chongshan is that he is not specialized in producing this kind of industrial parts.

It is used to produce some industrial parts of the casting model, the use of this 3D printing jishu production of industrial models, the processing time is 35% less than the traditional means, and the cost can be saved 40%.

Once this model is manufactured, then if you use pouring jishu, you can manufacture such industrial parts in large quantities.

If stamping jishu is used, then it is also possible to produce industrial parts in large quantities with such molds.

Moreover, the industrial parts produced only need to be polished later to become finished parts.

Although there is no breakthrough in such jishu for parts that need to be machined, it is a boon for industrial parts that require a large number of casting jishu and stamping jishu.

You must know that in the current industrial field, the most cost-saving process for processing metal parts is to use a large number of casting or stamping methods, especially in the field of automobile manufacturing.

Before using such a manufacturing method, the most important preparation is to open the mold, that is, to first manufacture the appropriate mold, and then use this mold as a blueprint for large-scale processing.

And because of the problem of finishing precision, our country's industrial mold opening jishu has not been very advanced, take the automotive field as an example.

When many private capital in China entered the field of automobile manufacturing, when we did not open the mold for the car splicing, the finished products produced were spliced together, and the gaps in those splices were amazing.

For example, the seams of the engine caps of automobiles, the seams of lights, or the seams of the trunk lids, in the earliest days, some people have measured that the thickest part is twice or even three times that of Japanese or German cars.

On the one hand, such a rough style will make customers jealous, and on the other hand, it will also cause the car to be used for a period of time after a period of time, abnormal noises and small problems.

This will not only lead to a large-scale wave of car repairs, but also greatly reduce the reputation of your own brand among customers.

In the previous life, such a problem has not been too much of a concern, and the attention of domestic private automobile practitioners has not attracted their attention until their products, because of the rough workmanship, have caused a large number of consumer complaints in China.

And such a problem has been delayed for five or six years before it can be resolved.

And their solution is that whenever they design a new car, they will directly take the drawings and go to Japan to find someone to help open the mold, which is not only a waste of time, but also a waste of money.

And when there is friction with Japan because of political problems at home, they will also be subjected to a lot of difficulties in Japan.

Such a situation, in China, that is, BYD, can be very haode to solve, because in 2008, taking advantage of the outbreak of the international financial crisis, they simply spent a huge amount of money to directly acquire a mold and make tools in Japan, mastered this jishu, which solved their own problems.

Other domestic auto practitioners do not have the courage of BYD at all.

This also illustrates the gap between China in the field of molds compared with Japan, Germany, the United States and other advanced machining fields.

Even if we can buy their jishu, but in the field of precision manufacturing, we are still worse than them, after all, they have been exploring this field for decades and have enough jishu experience, but we do not have this aspect.

But if we use 3D printing jishu, we can definitely overtake in a different corner in the field of precision manufacturing.

After all, what they rely on is their high-precision machining tools and means, and 3D printing jishu relies on finding another way to reinvent a suitable development path.

And this road, compared to theirs, is more time-saving, and it is also more cost-saving.

Thinking of this, Li Yifan couldn't help but be a little anxious.

In his previous life, when Professor Yao Chongshan was noticed by people, it was when he finished developing their shijie largest 3D printer.

At that time, because the development of 3D printing jishu in the world was in full swing, the country also attached great importance to this new technology, and was looking for professionals with experience in this field across the country, that is, at this time, Yao Chongshan entered the vision of the domestic high-level.

Later, he and his team were also invited to participate in the construction of a military project in China...... (To be continued......)