Siheyuan: Originally I just wanted to be a little transparent

Time passed day by day, and in the blink of an eye, two months passed.

The new power plant of this steel rolling mill, the large-scale generator set that Lin Shengli led everyone to imitate, has been officially installed and powered.

As for the steel rolling mill's practice of unified construction planning of steel mills and power plants, as a pilot project, this successful experience has completely caught the attention of the planning department.

Now we are waiting for the new power equipment manufacturing plant in the steel rolling mill to be put into operation. The planning department and the construction department will follow the construction model of Lin Shengli's power plant in the steel rolling mill and promote it nationwide.

In addition, this power equipment manufacturing plant has just built some infrastructure and is still early to start production. Equipment orders placed by the power department have already been scheduled for a year or two.

As for other orders from local governments or major enterprises and institutions, I'm really sorry. We really can't produce them and we really can't take them here.

As for handing over production to other factories, there must be other factories, or other factories must have the technical level to produce.

Not to mention anything else, who can learn the standardization and assembly line that Lin Shengli established in a short time, the yield rate of 99.9%, and the ultra-high production efficiency.

Time flies by like a flash, and a few months pass by.

Good news also came from the Special Aviation Research Laboratory. The various downstream factories that produce supporting parts for the Jian Shiji have also completed standardized transformation and produced the first batch of qualified parts that meet the standards. .

Among them, what has always been a headache for everyone is that in Lin Shengli's original design plan, the design and manufacturing of the overall frame of the Jian Shiji also ushered in a major breakthrough.

According to the requirements in the design plan, the overall frame of the J-10 Ji has large outer dimensions, double-sided processing, complex structure, and high precision requirements. Even in the 90s, it was known as the "No. frame in Asia".

The reason for this reputation is that the aircraft frames in the past were assembled from dozens or even hundreds of parts, but the J-10 Ji overall frame uses one blank and one program to replace the hundreds of parts in the past. Parts, this is also the first time in Asia.

It is easy to say the words "Asia's No. 1", but it is not so easy to do it.

Since I had no previous processing experience, producing this frame was an exploratory process.

This frame is worth a lot of money just as a blank, and it is completely new technology.

Choosing the software to process this frame is also very tricky. I am not sure about programming with new software. Even if it is programmed, whether the post-processing software that matches the machine tool is easy to use is still a question.

How to check the processing program?

How to determine the trial cutting plan?

How to choose the process parameters for rough machining, semi-finishing and finishing?

Every step is ambiguous.

Especially for double-sided processing, there is no advanced vacuum fixture to fix it, so you can only rely on your own exploration and breakthrough.

Some people say, "aviators are lucky when they encounter the development of new aircraft." In fact, the second half of this sentence should be added - "the effort is also arduous." Sometimes it is not too much to even use "cruel" to describe the developer's experience. .

The developers who participated in the "Asia's First Frame" have a particularly profound understanding of this.

The first is the psychological pressure when processing parts.

The price of parts after all CNC machining processes including rough machining and semi-finishing is sky-high. Faced with such expensive parts, the psychological pressure experienced by the master workers is unimaginable.

What's more, this kind of part processing requires many steps, takes a long time, and does not allow the slightest error. It is really not easy.

The second is poor processing conditions.

The developers worked overtime for a long time and were extremely exhausted. They also had to endure high temperatures, the unpleasant smell of coolant, and flying metal shavings. They also had to stare at the small blade head for a long time under dim lights.

In the 90s, our country's science and technology had made great progress, and various industrial supporting facilities were relatively mature. So much manpower and material resources were gathered, and it took a lot of effort and a long time to do it. , and finally achieved this “Asia’s No. Box”.

But at this time, there is nothing you want. There is no CNC machine tool, no programming software, not even a high-precision engraving knife...

But even under such difficult conditions, we really have to admire our scientific researchers. Everyone gave full play to their collective wisdom. After countless brainstorming, they finally came up with an alternative method.

We will use the old method, first produce all the components of the machine frame, and then assemble them, and then reverse the mold, and try to make those integral frame parts that can be formed at one time into a whole mold.

Those special places are made into separate molds, produced, and then welded and assembled with the large frame.

After such operations, although it is not as good as the one-piece "Asia's No. 1 frame" in later generations, the outer frame part that was originally assembled from dozens or even hundreds of parts has been made into one that can be used in three to five parts. It can be assembled from just one integrated component, which is the new "Asia's No. 1 frame" in this era.

In this way, with the hard work of our scientific researchers and master workers, at the end of the year, various supporting parts for the third-generation machines produced across the country were gradually delivered to the final assembly workshop of the base here in Chengdu. inside.

After all the parts and components were in place, the final assembly workshop at the Rongcheng Industrial Base began working overtime to assemble the first Raptor fighter (codename of the Jian Shi Ji).

At this time, those old workers, old masters, and old scientific researchers transferred from Chengdu Aircraft and various scientific research institutes and other units played a huge role.

It didn't take long, with the joint efforts of everyone, the first third-generation aircraft we independently developed and manufactured - the Raptor fighter, the silver-gray and powerful figure appeared in the assembly workshop.

"Xu Aiguo, hurry up and take people to check and test all parts of the Raptor. Make sure there are no problems before it goes to heaven."

After receiving Lin Shengli's instructions, Xu Aiguo immediately led people to start another round of inspections and tests.

After the incident with Pu Siren last time, Xu Aiguo, who was originally a bit careless, has become calmer.

After calming down, Xu Aiguo soon showed great talent in scientific research.

For such a good seedling, Lin Shengli also entrusted him with important tasks.

Let Xu Aiguo be his deputy to an experienced veteran comrade transferred from Chengdu Aircraft Manufacturing Co., Ltd. and be responsible for the final assembly of the third-generation Raptor.

After returning to the office at the Rongcheng base, Lin Shengli said to Wei Baoguo, who was sitting opposite:

"Baoguo, now the third-generation aircraft prototype that we have completed assembly has gone through many rounds of ground tests. Next, it can be carried out for the first test flight. When I return to Sijiu City this time, I will report it to Tang Yuan Commander, ask him to report this matter to the superiors."

Wei Baoguo looked at Lin Shengli and said very puzzledly: "Director, I don't understand this technical aspect, but I think we should conduct one or two test flights here first, and then wait until there are no problems, and then Report this good news to the top."

"Or invite the higher ups to observe a formal test flight?"

"You also know that once you report the news, they will definitely send people down to observe the first test flight." "This is successful, everything is easy to say, and all of our faces will be happy."

"But if something goes wrong during the test flight, it will have some impact on you and all the comrades in our Special Aviation Research Laboratory."

"If we test the flight ourselves, if there are any problems, we will solve them internally. But if there are superiors watching, it will be difficult to talk about it!"

After listening to Wei Baoguo's words, Lin Shengli felt that it seemed reasonable.

Although he thought he was very confident in this test flight, he really had to worry about the feelings of all his comrades.

The design of this third-generation Raptor is basically slightly modified by Lin Shengli based on the plan given by the system. Since the system is produced, there will definitely be no problems with the overall design.

However, design is design and implementation is implementation.

Everything is done by people, and no one can 100% guarantee whether there are any omissions or oversights during the implementation process.

Wei Baoguo's opinion is quite pertinent. He should do a test flight first. If there are any problems, he should solve them internally. If there are no problems, then report them to the superiors for a formal test flight.

This is equivalent to the Spring Festival Gala in later generations, a rehearsal before the official live broadcast.

So, after Lin Shengli returned to Sijiu City, he went to Dean Tang to discuss it.

Even if this is an internal test flight, at least relevant internal personnel must be invited to participate.

Afterwards, Dean Tang participated in the internal test flight activities organized by Lin Shengli Chengdu Industrial Base on behalf of the three aircraft departments and the aviation department.

As for the process, there’s not much to say, just some basic flight tests, and it was very successful.

Shortly after Dean Tang came back from Rongcheng, he sent a formal report to his superiors, inviting them to participate in the official test flight of the Raptor fighter scheduled for the beginning of spring on February 4, 1969.

When the superiors received the formal report from Dean Tang, they were actually quite surprised.

When the third-generation aircraft project was initially established, the expectations were to complete the design and theoretical demonstration within three years, to produce a prototype within five years, and to achieve mass production and installation within eight years.

Although after Lin Sheng cheated, the design and theoretical demonstration were basically just a formality. It took less than half a year to complete these two preliminary tasks.

However, when it came time to officially build the prototype, we immediately encountered various problems.

I also asked Lin Shengli whether he could produce a prototype soon.

Lin Shengli's answer is yes, but it is really of little value to spend a year gathering the strength of the whole country to build a third-generation aircraft.

These three-generation aircraft will eventually be mass-produced and installed in the army.

According to the normal production process, a brand new fighter production line will have an annual output of 12 aircraft after trial production in the first year. After becoming familiar with various processes and processes, after normal production in the second year, the annual output can be achieved at 24 aircraft. .

But there is a premise, that is, your fighter production line must be an advanced assembly line using standardized processes.

Otherwise, just the scrap rate will make people’s heads big.

And if you use the all-hand rubbing method, there is no guarantee whether you can get one this year. If there is a problem, the maintenance will be a problem, and there will be no parts to replace.

The big guys above also know that it is not enough to just pursue it. They still have to listen to Lin Shengli and standardize it and mass produce it.

Therefore, the above expectation is to upgrade the entire third-generation aircraft industry chain within three years, implement standardized process transformations, and then build the first prototype.

The above idea is very clear. Although it seems that the first prototype will appear much later, as long as the first prototype comes out and passes the test and flight test, the subsequent ones can be directly online. Production has started.

Instead of developing a prototype first and then developing a supporting production line based on the prototype as before.

But unexpectedly, it only took less than half the time originally expected, and the first prototype was ready for official test flight.

This incident is definitely a happy event for the above.

The superiors quickly issued an approval and agreed to conduct a formal test flight of my country's third-generation fighter Raptor on the first day of spring in 1969. The superiors will also send corresponding comrades to observe the test flight activities.

After learning the official approval from above, Lin Shengli notified all the staff of the Special Aviation Research Laboratory of the good news. After hearing this, everyone was extremely happy and motivated.

While waiting for the official test flight, two more Raptor fighter jets were assembled at the industrial base in Chengdu for subsequent adjustment and finalization test flights.

Soon, the day of the beginning of spring in 1969 came.

The Beginning of Spring is the first of the twenty-four solar terms and is also one of the important traditional festivals for flower growers.

"Li" means "beginning". Since the Qin Dynasty, flower growers have always regarded the beginning of spring as the beginning of spring.

The beginning of spring is divided from an astronomical point of view. Spring is warmth, birds singing and flowers are fragrant; spring is growth, plowing and sowing.

As the saying goes, "The plan for a year lies in spring." The beginning of spring has been a major festival since ancient times.

Lin Shengli chose this day as the official test flight day for the Raptor, the third-generation fighter jet we independently developed and manufactured, which also has profound implications.

On this day at the beginning of spring, our third-generation fighter aircraft will officially soar in the sky of the motherland.

So starting from today, our aviation industry, our People's Air Force, just like the beginning of spring, begins to sprout and grow prosperously.

The seeds sown today will surely bloom into more beautiful flowers in the future.

At this point, our aviation industry will open an epoch-making new chapter.

On this day, the weather was good. The test flight ground in Chengdu was cloudless and the breeze was blowing. It can be said that today is a very suitable day for test flights of fighter aircraft. (End of chapter)