Chapter 570: Turn over and become Party A
The die forging press was not set up in Jiangzhong’s old factory area to the west 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 the legacy of the old team at Jiangcheng Heavy Machine Tool Factory would be difficult to clean up, which might have some negative impact on equipment manufacturing and future production processes.
Although Liao Xinhua did a good job in the finishing work and no longer had any worries in this regard, after all, the land was approved and it was not in vain.
As the motorcade gradually drove from the city center to the suburbs, the scene outside the window became increasingly desolate.
At this time in 1998, China was far from the infrastructure maniac that everyone would be 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. scene.
Even after walking about halfway, there was no paved road left.
Fortunately, the power of several cars in the convoy was 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 area around the new factory is full of things like this. It’s not possible to plant dirt roads.”
“There’s no way, it’s too far away from downtown Jiangcheng, otherwise it wouldn’t be possible to get it approved so quickly and neatly.”
Hurry. Yan Yongnian, who got out of the car behind Chang Haonan, took a deep breath of the suburban air.
It smells like cow dung.
His face froze, and after a pause he continued:
“And when you originally selected this land, didn’t you plan a dock? By then, large-sized workpieces and equipment can be transported by ship. It will save a lot of trouble if we transport it here.”
People of this era can never imagine how exaggerated the speed of urban construction in China will be in more than ten years.
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 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..."
said At this point, he was finally interrupted by Chang Haonan waving his hand:
"Okay, okay, don't compliment us too much, go inside and have a look."
"Mr. Chang, this is what I said. But it's all the truth. How can the truth be considered a compliment..."
Liao Xinhua's rhetoric was clear and flowing, and he was obviously very sophisticated.
But what he said was quite true.
In fact, Chang Haonan had this consideration in mind when he originally chose the location of the die forging press in Jiangcheng.
In the last life, the large-scale construction of highway networks in China only started after 2006. Even if this timeline is moved forward due to the butterfly effect, it will definitely not be able to keep up with the project schedule of the die forging press.
Moreover, in the late 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 thing.
How high is it?
In 1998, in Hubei Province, where Jiangcheng is located, the slogan "Car gangsters and road tyrants will be rewarded for killing them".
Not only cars, but also trains are robbed.
Relatively speaking, water transportation is much more convenient and safer.
...
Compared to the surrounding area, which seemed to be in the wilderness, the situation inside the factory area was actually much better.
After all, construction has been started for quite some time, and the efficiency of semi-military management is still the same. 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 all kinds of 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 the foundation under the forging press To prevent settlement and offset, the construction team was specially asked to use high-grade reinforced concrete columns to hit the rock layer below, and then pour the foundation on top to ensure that the equipment’s working needs will be met for at least the next century.”
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 dusts off dust.
“Are those people from the construction company?”
He asked Yan Yongnian next to him.
The latter shook his head:
“No, in recent days the construction team has been reinforcing the dock and preparing for the entry of heavy machinery and equipment from behind. No one is here in the forging work area.”
"These are representatives sent by some of the suppliers of our project. They will report to you later on the relevant work preparations."
"Originally, we planned to open an office in the old factory area. Yes, but some things, especially issues related to equipment assembly, cannot be explained clearly on site, so we all come here.”
Chang Haonan suddenly understood.
It turns out to be my 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 like he was carrying 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 naturally it is impossible to send people here all.
Those who are 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 to the point.
"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 opened the long roll of drawings he carried with him and laid out the Have a drawing board ready 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 when the design drawings are sent to his hands.
However, according to the company's requirements, even so, he still had to follow the process before entering the production process.
Then, I discovered a lot of things that I didn’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 his pen to a location on the top of the C-shaped plate on the drawing.
It has already been circled with a red pen and marked a lot, obviously it was not noticed just now.
"For the welding seams of C-type plates, you are required to weld along the width direction in terms of technology, which requires six welding seams to complete the manufacturing. However, our past specifications are generally to reduce the number of welding seams as much as possible. If this is changed to longitudinal welding, it will only 4 are needed..."
"Generally speaking, this should be the case, but the situation of this C-type plate is special."
Chang Haonan took the pen from the other party:
"During the design process, we conducted quantitative calculations on the stress conditions of the workpiece 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 exactly located here. Near the location, the weld will be subject to the greatest shear stress. ”
“In this regard, you are a professional and should know that this is a problem that needs to be avoided during the welding location selection process. ”
Duan Hongbin immediately started sweating.
Of course he knows this principle, but in the past, the location of the so-called "maximum shear stress" was usually based on experience.
The longitudinal weld does not directly pass through the bolt hole and other parts. According to common sense, it should be okay.
But who would have thought...
It was directly a dimensionality reduction blow.
"For a workpiece of this size... can the stress calculation be so accurate?"
Duan Hongbin wiped the non-existent sweat under his helmet and asked in a tone that was obviously not confident.
"Let's do this. Follow Yan Gong later and ask him to show you our stress calculation results. You will understand then."
Chang Haonan stretched out his hand to signal. Yan Yongnian stood next to him for a moment, and then answered.
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 manufacturer is obviously a bit inquisitive, so it doesn’t hurt to let them gain insights.
"Hey, okay, okay..."
Duan Hongbin saw that he found the steps and hurriedly got off the donkey along the slope.
"Mr. Chang, the main working cylinder chooses the place where two inner 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 the maximum equivalent stress of the split working cylinder barrel are at the bolt holes connecting the bottom of the cylinder and the cylinder barrel. The problem of high stress is difficult to change. In comparison Although the structure we designed will also cause stress concentration at the bottom, at least the location is not as fatal as the middle of the cylinder."
"..."
Among these suppliers, there are some. More than half of them are "own people" who were placed under the jurisdiction of the Equipment Industry Department in this organizational adjustment. Most of them had only learned about Chang Haonan before, but had no direct contact with him.
Now that Chang Haonan's several rounds of answers are flowing down, he can be regarded as showing his skills in front of these old technicians.
Soon, everyone’s questions changed:
“Mr. Chang, take a look at the main frame hoisting plan we designed, are there any flaws...”
“This It is an equipment plan for supporting trusses. You have seen it, Mr. Chang..."
"As for the manufacturing of movable beams, because large castings cool slowly, metal solidification time is long, and wall thickness effects are prominent, our current process relies purely on experience. , it is difficult to control the casting process of such a large-sized product. Several simulated trial productions have found that the strength and impact value of the castings are low, and they are prone to thermal cracks. Do you think there is any way to adjust the process parameters more accurately..."< br>
Yan Yongnian and Liao Xinhua, who had been squeezed to the outside of the crowd, looked at each other.
Okay, we have another on-site Q&A session...
(End of this chapter)