The Military-industrial Scientific Research System of the Academic Master Chapter 570

Chapter 570 Turn over and become Party A

The die forging press was not set up in Jiangzhong's old factory on the west side of East Lake. Instead, an additional piece of industrial land along the river was applied for in the suburbs of Jiangcheng.

First of all, heavy-duty die forging press equipment requires a special working environment. If it is modified on the basis of the existing factory area, there will be too much movement and production will be stopped during the process.

Secondly, at the beginning, Chang Haonan was worried that it would be difficult to clean up the legacy of the old team at Jiangcheng Heavy Machine Tool Factory, which might have some negative impact on equipment manufacturing and future production processes.

Later, although Liao Xinhua did a good job in the finishing work and no longer had any worries in this regard, in the end, the land was already approved and was not used in vain.

As the motorcade gradually drove from the city center to the suburbs, the scene outside the window became more and more desolate.

At this time in 1998, China was far from the infrastructure maniac that everyone is familiar with in later generations. Even a regional central city like Jiangcheng still looked like a large rural area as long as you walked slightly outside the city.

Even after walking about halfway, there was no paved road left.

Fortunately, the power of several cars in the convoy was still good, so no one got out to push the cars forward.

“The city's infrastructure construction still needs to keep up..."

After getting off the car, Chang Haonan rubbed his head that was a little dizzy due to the bumpy ride, and said in a somewhat unbearable tone:

“We can't control other places for the time being, but the new factory area is surrounded by mud roads like this.”

“There is no way, this place is too far away from downtown Jiangcheng, otherwise it would not be possible to get it approved so quickly and neatly.”

Yan Yongnian, who got out of the car immediately behind Chang Haonan, took a deep breath of the suburban air.

Smells like cow dung.

His expression froze, and he continued after a short pause:

“And when you first selected this land, didn't you plan a dock? Then large-sized workpieces and equipment can be transported by ship, which will save a lot of trouble.”

People of this era would never have imagined how exaggerated the pace of urban construction in China would be in a decade or so.

For them, this place is basically equivalent to being in a ravine, and it is not considered the boundary of Jiangcheng at all.

Liao Xinhua also nodded:

“Yes, at the beginning, many comrades still had some concerns about this site. They felt that it was too desolate, the environment was too bad, there were no supporting facilities, and life was inconvenient. There were many people who complained.”

“Later, when the work started and efficiency improved, everyone's views changed, especially the security department and the transportation team. There were far fewer things to worry about, and it was Mr. Chang…”

At this point, Chang Haonan finally interrupted him with a wave of his hand:

　　"Okay, okay, don't flatter me too much, go inside and have a look."

“Mr. Chang, what I said is all the truth. How can the truth be considered a compliment..."

Liao Xinhua's rhetoric is clear and flowing, and he is obviously very sophisticated.

But what he said was quite true.

Actually, Chang Haonan had this consideration in mind when he originally chose the location of the die forging press in Jiangcheng.

In the last generation, China's large-scale highway network construction only started after 2006. Even if this timeline is advanced due to the butterfly effect, it will definitely not be able to keep up with the project schedule of the die forging press.

Furthermore, at the end of the 1990s, social security was far less stable than it would be more than twenty years later.

Long-distance land transportation is still a very risky matter.

How high is it?

It is now 1998. In Hubei Province, where Jiangcheng is located, the slogan "Car thieves and road bullies will be rewarded if they are killed."

Not only cars, but also trains are robbed.

Relatively speaking, water transportation is much more convenient and safer.

Compared to the surrounding area which seems to be in the wilderness, the situation inside the factory area is actually much better.

After all, construction has been started for quite some time, and the work efficiency is still semi-military. The simple dock has been put into use, and the ground has been leveled and hardened.

It's a pity that there are no construction site artifacts such as prefabricated houses in these days, so there are various relatively simple iron houses around.

“This area is the forging workshop planned to house the die forging press.”

Liao Xinhua pointed to an area in the direction of the factory near the dock that was obviously different from other hardened floors and said:

"Because this place is too close to the river and the geological conditions are not good, in order to ensure that the foundation under the forging press does not settle or shift, we specially asked the construction team to use high-grade reinforced concrete columns to drive into the rock layer below, and then build them on top The foundation is poured to ensure that the equipment's working needs will be met for at least a century to come.”

Chang Haonan noticed that there were about dozens of people wearing blue work clothes and safety helmets around that area.

However, since the color can still be seen in the work clothes, it means that there is a high probability that he is not a civil engineer who is dusting.

“Are those people from the construction side?”

He asked Yan Yongnian next to him.

The latter shook his head:

“No, in the past few days, the construction team has been strengthening the pier and preparing for the entry of heavy machinery and equipment from behind. No one is here in the forging work area.”

“These are representatives from some of the suppliers of our project. They will report to you later on the preparations for the work.”

“Originally, we were going to hold a meeting in the office over at the old factory, but some things, especially issues related to equipment assembly, couldn't be explained clearly on site, so we all came here.”

Chang Haonan suddenly understood.

It turned out to be my own Party B. This feels really good.

He has spent his whole life being Party B for others, and now he has finally turned around and can be Party A's father for once.

Chang Haonan felt that there was a bit of wind when he walked.

“Let's go and meet them.”

There are countless units directly or indirectly involved in the construction of the die forging press, so it is naturally impossible to send people to all of them.

Those here today are mainly the first-tier suppliers responsible for core components such as C-shaped plates, main working cylinders, support trusses and movable beams.

Even so, after Yan Yongnian introduced them, there were nearly twenty.

After another round of routine greetings, we finally got down to business.

"Mr. Chang, my name is Duan Hongbin. I am responsible for manufacturing the C-shaped plate of the rack. I need to confirm some details with you before the process method is determined."

An engineer unfolded the long roll of drawings he carried with him and laid them out on a drawing board prepared nearby.

Actually, when Duan Hongbin received this production task for the first time about a month ago, he was a little confused.

He has been working in the machinery manufacturing industry for twenty years, but he has never seen a situation where even the process details have been determined by the time the design drawings are sent to his hands.

However, according to the company's requirements, even so, he still has to follow the process before entering the production process.

Then, I discovered a lot of things that I couldn't quite understand.

But he didn't dare to change Party A's father's request casually. At this time, there happened to be an opportunity to come to the site for a technical analysis meeting, so he came over on a business trip with the information.

"here."

He pointed with the pen to a location on the top of the C-shaped plate on the drawing.

The place has already been circled with a red pen and marked a lot. It is obviously not something that has just been noticed.

"For the welding seams of C-type plates, you are required to weld along the width direction in terms of technology, so six welding seams are needed to complete the manufacturing. However, our past specifications generally minimized the number of welding seams. If this is changed to longitudinal welding, it will only Need 4…”

“Generally speaking, this should be the case, but the situation of this C-type plate is rather special.”

Chang Haonan took the pen from the opponent's hand:

“During the design process, we conducted quantitative calculations on the workpiece stress corresponding to different welding methods and found that the maximum principal stress is at the transition fillet of the mating area with the clamping beam pad, and the vertical weld is located just near this position. will cause the weld to be subject to maximum shear stress.”

“You are a professional in this regard and should know that this is a problem that needs to be avoided during the welding position selection process.”

Duan Hongbin immediately broke out in sweat.

He certainly knows this principle, but the location of the so-called "maximum shear stress" was generally based on experience in the past.

The longitudinal weld does not directly pass through the bolt hole and other parts, so according to common sense, it should be okay.

But who would have thought…

It is directly a dimensionality reduction blow.

“For a workpiece of this size class… can the stress calculation be so accurate?”

Duan Hongbin wiped the non-existent sweat under the helmet and asked in a tone that was obviously not confident.

“Well, follow Yan Gong later and ask him to show you our stress calculation results. Then you will understand.”

Chang Haonan reached out and gestured to Yan Yongnian who was standing next to him, and then replied.

Stress field calculation is a step in the design process and is generally not included when sending drawings.

After all, most manufacturers are engaged in processing according to drawings.

It's just that this producer is obviously a bit inquisitive, so it wouldn't hurt to let them gain some insight.

“Hey, good, good…”

Duan Hongbin saw that he found the steps and quickly got off the donkey along the slope.

“Mr. Chang, the main working cylinder chooses the place where the two internal arcs intersect to be fixed with a vertical hole. Is it the same reason?”

Another engineer next to him adjusted his glasses and asked immediately.

"Yes, the maximum principal stress and maximum equivalent stress of the split working cylinder barrel are at the bolt holes connecting the cylinder bottom and the cylinder barrel. The problem of high stress is difficult to change. In contrast, although we designed The structure will also cause stress concentration at the bottom, but at least the location is not as critical as in the middle of the cylinder.”

More than half of these suppliers are "own employees" who were placed under the jurisdiction of the Equipment Industry Department during this organizational adjustment. Most of them had only learned about Chang Haonan before, but had not had direct contact with them.

Now that Chang Haonan has been pouring out several rounds of answers, he can be regarded as showing off his skills in front of these veteran technicians.

Soon, many people's questions changed:

“Mr. Chang, please take a look at the main frame hoisting plan we designed. Are there any gaps...”

“This is the equipment plan for supporting the truss. You have often seen it..."

"Regarding the manufacturing of movable beams, because large castings cool slowly, the metal solidifies for a long time, and the wall thickness effect is prominent, our current process relies purely on experience, and it is difficult to control the casting process of such large-size products. Several simulation trial productions have found that castings The strength and impact value are low, and it is prone to thermal cracks. Do you think there is any way to adjust the process parameters more accurately..."

Yan Yongnian and Liao Xinhua, who had been squeezed to the outside of the crowd, looked at each other.

　　　Okay, there is another on-site Q&A session...

(End of this chapter)

Chapter end

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