It's easy to say that it's easy to compete, but it still takes a lot of solid work to really machine this shaft. The Provincial Department of Light Chemical attaches great importance to this matter, and transferred several process engineers from other enterprises to work together with Fan Shibin and others to compile the process documents of the ice machine spindle from scratch.

As the saying goes, the layman looks at the bustle, and the insider looks at the doorway. In later generations, there were many so-called "financial commentators" who nagged gods and gods, and they kept the phrase "Chinese lack innovative spirit" in their mouths at every turn, in fact, these people had not even heard the word craft.

For the uninitiated, it is difficult for them to understand why a shaft is so difficult to make, and in their eyes, it is nothing more than a matter of getting an iron rod and sharpening it. Even some people still talk about the success of a certain agricultural machinery factory in imitating a certain artifact, as if a car or an airplane can move, it means success.

In industry, it is not difficult to make the shape of a part, and when it is the worst, it is difficult for a worker to file with a file, and a shape can also be processed. The difficulty is to achieve the technological requirements of the processing in order to make the various surnames of the parts can achieve the best condition.

Take a shaft as an example, its blank can be cast or forged, and the shape of the blank produced by the two is exactly the same, but the material can be very different.

The casting process is to inject molten steel into the mold and let it cool and form. In this way, the workpiece is formed with a large grain volume inside the material, and the toughness is insufficient. Forging, in which the blank is placed under a hydraulic press of thousands or even tens of thousands of tons, is kneaded into the desired shape like a dough. Under high pressure, the grain of the material is refined and the density increases, making it more tenacious.

If you don't understand this difference, imagine the process of kneading dough, the appearance of repeatedly kneaded dough may be exactly the same compared to the unkneaded dough, but the difference in taste is very obvious.

In the field of aviation, the main beam of the large aircraft is the most stressed component of the whole aircraft, and this kind of main beam is forged and formed in tens of thousands of tons of die forging machine, only in this way can it withstand the fatigue damage caused by repeated use. If there is no such die forging machine, using other processes to manufacture this kind of main beam, the aircraft can of course be made, and it can also "soar into the sky". But its structural parts are very old, and maybe other aircraft can last for decades, and this kind of aircraft will be scrapped in a year or two.

The progress of craftsmanship is difficult for outsiders to see. Financial commentators are generally only concerned about whether you have built an airplane or not, but no matter what process you use, it is impossible for their eyes to see the size of the grains in the main beam material. Only those who are immersed in work will know that those things with a bright surface are actually of no value, and the mark of industrial level is not in the sign on the head of the car, but in the craftsmanship level of ordinary parts.

By the way, in 2010, in Kunshan, Suzhou, a 100,000-ton hydraulic die forging machine has risen from the ground, which is the world's largest die forging machine until then, which represents that China's processing capacity has reached the world-class level at least in this regard.

The first production process of this spindle that Hanhua Factory is currently tackling is the die forging of the blank. Hanhua factory does not have such a large forging machine, but the military industry system in the province does. The day after Lin Zhenhua returned from Yanjing, a Jiefang truck with the words "Changhong Machinery Factory" painted on the door drove into the gate of the Hanhua factory, carrying four forged blanks and the broken spindle.

"Thank you so much." Zhu Tiejun said to the technical section chief of the Changhong factory who came to deliver the goods.

The technical section chief's name is Yan Yuanhe, who is in his early forties, and he looks stout and stout, not quite like a scholar. While shaking hands with Zhu Tiejun, he said: "This is what we should do, and we also hope that you can defeat the little devils and fight for us Chinese." ”

Zhu Tiejun said politely: "I'm really embarrassed, and I asked Section Chief Yan to personally send the parts over." ”

Yan Yuanhe said with a smile: "This is what I took the initiative to ask for, and I also want to see with my own eyes, how did you process this spindle with a special-shaped surface?" To tell the truth, the processing of special-shaped surfaces is also an unattainable technology for our military industrial system, one of you...... Hehe, with all due respect, a local medium-sized enterprise can actually do this? ”

Zhu Tiejun said: "I don't understand these specific technical problems, let's go back and let Lin Zhenhua, the deputy section chief of the technical department, explain it to you." However, he is very busy now, and he is calculating what kind of processing curve. ”

"Can I go and see how you do it?" Yan Yuanhe pleaded.

"Absolutely." Zhu Tiejun said, "We also have to ask Section Chief Yan to guide the work." ”

While talking, Luo Qinsheng had already brought a few workers over, unloaded the blank and the broken shaft from the car, pushed it with a trolley, and walked towards the metalworking workshop. Zhu Tiejun and Yan Yuanhe followed behind them and also walked into the metalworking workshop.

In the metalworking workshop, a space has been vacated for the work area of the spindle research project.

In the middle of the site, there is a gantry milling machine and a heavy-duty horizontal lathe, which are the two machines that are ready to be used to machine the spindle. Peng Gang, Zhou Houcheng and Wei Jingwen were gathered around the machine tool, discussing how to transform the machine tool to meet the needs of processing. After the last experiment, Wei Jingwen has touched the doorway of numerical control transformation, however, how to do it on the machine tool still requires the cooperation of skilled workers.

Fitter Sun Changyuan's current task is to be responsible for the measurement of the shape of the spindle, seeing that the broken shaft has been delivered, he hurriedly took a few apprentices and several technicians from the technical department to meet up, carefully lifted the broken shaft aside, and then took tools such as vernier calipers and micrometers to further measure the shaft. His son, Sun Xiaodong, also followed his father's footsteps, honestly holding a pen and paper to record the measured data.

Previously, the Light Chemical Department had organized people to measure the broken shaft and draw drawings. However, Lin Zhenhua and others believe that since the Hanhua factory has taken over the manufacturing task, they should test it again to ensure that they know it well. Measurement is also a technical job, and it is difficult to take it down without a diamond. For a spindle running at such a high speed, the slightest deviation will cause the operation to be unbalanced, which will lead to increased noise and broken shaft accidents.

In one corner of the field, blocked by a plywood, there are several tables with two Apple-II computers on them, and Lin Zhenhua and Hu Yang are crackling on the keyboard, entering groups of parameters into the computers. Both computers have five-inch floppy disk drives, so they have to save the disk once after a while with so much data, otherwise the memory will not fit in.

"The older one, named Populus euphratica, is a wood molder in our sand turning workshop; That young man's name was Lin Zhenhua, and he was the deputy head of our technical department. Zhu Tiejun introduced to Yan Yuanhe.

Yan Yuanhe was stunned and said: "The wood molder is working on the computer? Director Zhu, your factory is really a hidden dragon and a crouching tiger. I don't know if it's because you have too many talents, or if your workers are too good. ”

Zhu Tiejun didn't react: "Is there a difference?" ”

"Of course there is a difference. There are too many talents, that is, he was originally a technician, but you don't need so many technicians, so let him be a wood molder. Saying that the workers are too powerful, that is, if you grab a wooden mold worker at will, you can go to other factories to become technicians. ”

Zhu Tiejun still thought for a while before he understood Yan Yuanhe's ridicule, and he said with a smile: "Populus euphratica is a special case. He is a person who loves to study, and we once thought about transferring him to work in the technical department, but he said that he was willing to make wooden models. However, when we encounter such a major technical problem, we still have to ask him to come out. ”

While they were chatting, they saw a technician come to Lin Zhenhua and Hu Yang with a piece of paper that recorded the measurement data, and said something to them. Lin Zhenhua and Hu Yang looked at each other, put down the work in their hands, and strode to the side of the broken shaft.

Sun Changyuan handed a pair of micrometers to Hu Yang's hand, and Hu Yang took it and carefully measured it on the broken shaft. After measuring for a while, he raised his head and said to Lin Zhenhua with a smile: "Xiaolin, I guessed right, this place is indeed a mistake in the Light Chemical Hall." ”

"Well, people aren't too wrong." Lin Zhenhua said.

Hu Yang said: "However, this point is wrong, the envelope model we calculated is not correct, and I am still wondering, what is the new theory of Xiao Yue, why the curve is not conventional." ”

Yan Yuanhe was standing behind them, and when he heard Hu Yang say this, Yan Yuanhe felt so amazing that he couldn't help but interject: "Comrade, you mean to say that you can calculate the envelope of this special-shaped surface in advance?" ”

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