Surface machining of 120 curves

  After hearing Zhang Zhifang's self-introduction, Zhu Tiejun walked up and shook hands with him, also introducing himself: "Manager Zhang, hello, I am Zhu Tiejun, the deputy factory director of Hanhua Machinery Factory. This is our technical department head Fan Shibin, and this is our deputy technical department head Lin Zhenhua."

  Zhang Zhifang shook hands with Fan Shibin and Lin Zhenhua, then Xie Chunyuan arranged for them to take their seats. He said to Zhu Tiejun's group: "Manager Zhang is from Shanghai. He heard that we used the simulated five-axis machining method during the 210,000 ice machine main shaft breakthrough process and was very interested. He wants to get in touch with us and see if there are any opportunities for cooperation."

  Zhang Zhifang said, "Yes, our company also often produces some special curved surface products. The processing technology in this regard has always been a problem. Not long ago, I heard from a friend that there are enterprises in Jiangnan Province that can solve this problem using mathematical methods. So, I came here to learn more about it. These two colleagues of mine, Chang Qingbo and Yu Wen Zheng, are both comrades in our technical department, and they are very interested in this issue."

  Zhu Tiejun pointed at Lin Zhenhua and said: "The matter of imitating the five-axis, is mainly handled by Little Lin. For related technical issues, you can ask him."

  Lin Zhenhua looked at Zhang Zhifang and the other three people, saying: "I don't know what kind of items your unit usually processes, but our Hanhua factory has made some technical preparations in this area, so maybe we can provide some help. However, since all the leaders are here, there are some things that I may not be suitable to say, that is, the processing technology of the simulated five-axis, we have also invested a lot of cost in research and development, so..."

  "Xiaolin!" Xie Chunyuan couldn't help but intervene, Lin Zhenhua's words were obviously hinting at the issue of expenses. This Zhang Zhifang came with an introduction letter from the Shanghai Municipal Chemical Bureau, which was also a brother unit, how could they bring up the topic of money so casually?

  Alas, this Xiao Lin is fine in every way, but his idea of putting economy above all else is a bit too extreme.

  Xie Chunyan secretly said in her heart.

  Zhang Zhifang, however, did not take offense at this. He chuckled and said, "I understand what Comrade Lin means. Don't worry, we won't use your achievements for free. If our two sides can cooperate, we will certainly fully consider the cost aspect."

  Lin Zhenhua didn't feel he was in the wrong at all. After finally coming up with a core technology, why would he just give it away for nothing? If they wanted his help, that was fine, but they had to bring money or other benefits to the table. He gave Xie Chunyan an apologetic glance before asking Zhang Zhifang, "So, what do you want to know?"

  Zhang Zhi Fang sat next to Chang Qing Bo and Yu Wen Zheng, nodding at them, and the two began to ask questions. They had already seen the drawings of the ice machine's main shaft from Xie Chun Yuan before, and they knew that several non-standard surfaces were very difficult to process. So, they started asking questions from the processing details, almost every technical question was not let go.

  Lin Zhenhua personally experienced the process, so answering was not difficult at all. However, when he answered these questions, he still couldn't help but feel a little shocked, because Chang Qingbo and Yu Wen Zheng's professional foundation was very solid. In many places, Lin Zhenhua only mentioned it briefly, and they were able to understand the details clearly, and even raised very targeted questions. Fortunately, Lin Zhenhua didn't tell lies, otherwise he would have been caught out in just a few sentences.

  "Manager Zhang, it seems that their factory has a very good grasp of this technology. No wonder they can complete the processing of the main shaft by machining method." Chang Qingbo said to Zhang Zhifang.

  Wen Zheng said with some regret, "Some further technical details, Director Lin may not be too willing to disclose, especially when it comes to the calculation of envelope curves. I think Director Lin seems to have a confidential meaning."

  Zhang Zhifang said to Wen Zheng: "Others have worked hard to develop this technology, it's understandable that they want to reserve some of it."

  Lin Zhenhua hastily said, "No, no, thank you Director for being a witness. I didn't mean to keep it secret at all. It's just that I don't know what kind of thing you plan to build, and the curve derivation part is not something I did myself. Actually, the main work was done by a woodworker in our factory, but he didn't come today, so I couldn't explain it clearly."

  "Wood mold maker?" Zhang Zhifang was shocked like everyone else, "Is your wood mold maker also responsible for calculating curves?"

  "It was a worker named Hu Yang, whose family background was slightly better, so he was more conservative in his daily life. He loved to study and had a very good technical level. We suggested several times that we wanted to transfer him to the technical department, but he refused, so he continued to work as a wood model worker."

  "What a waste of talent!" Zhang Zhifang said, "What's the difference between high and low composition? [***] is still a rich peasant at home, birth can't be chosen, but one's path can be."

  As soon as this was said, everyone was shocked and felt that the business manager's tone was too strong. Zhang Zhifang himself also felt a bit abrupt after finishing speaking, and hurriedly smiled at everyone, saying: "Director Lin, we came here today mainly to ask for your advice. We currently have a component that needs to be processed, which also involves some irregular surfaces, but it is more complicated than your main shaft. I would like to ask you to take a look and see if there is any possibility of designing a machining method to solve it."

  "What kind of component?" Lin Zhenhua asked.

  Zhang Zhi made a gesture to Chang Qingbo, who took out a drawing from his bag and handed it to Lin Zhenhua, saying: "Director Lin, this is our design drawing, please take a look."

  Lin Zhenhua took the drawings, unfolded them to take a look, and Fan Shibin also leaned over to take a peek. Zhu Tiejun didn't know much about this sort of thing, so he just stayed out of their way.

  On the blueprint, a strangely shaped thing was drawn, like a huge leaf, curved at an odd angle.

  When Lin Zhenhua saw this picture, his first reaction was that someone wanted to smash their own venue, because it looked just like the blades of an electric fan. But soon he reacted and realized that this was definitely not the blade of an electric fan, as there was no need for the blades of an electric fan to be made so complicated.

  He knew he had seen this drawing before, no mistake, the irregular part that Hu Yang asked him to process last time was exactly like this! Although there were some differences between them, they must be of the same type! From his perspective as a mechanical research graduate student, it could be seen that this thing was either a propeller used on ships or an impeller used on steam turbines. If so, then the so-called Manager Zhang in front of him, who stood upright like a professional soldier, must have been extraordinary. And the woodworker at Hanhua Factory might have had some inexplicable connection with Manager Zhang.

  Lin Zhenhua's heart thumped with excitement as he felt that he had grasped something, like a door handle. What would come out if he opened this door?

  "Isn't that the thing you guys have in your office?" Fan Shibin also noticed.

  Lin Zhenhua suppressed the fluctuations in his heart and calmly asked Zhang Zhifang, "Manager Zhang, this drawing of yours only marks the shape parameters, but not the size parameters. I don't know what the final product you're going to process should be, how big is it?"

  Zhang Zhifang did not speak, and Chang Qingbo answered for him: "Director Lin, let's not discuss the issue of dimensions for now. First, estimate whether you and that woodworker master can make a curved surface like this equation."

  Lin Zhenhua said, "We can't just talk about it, to be honest with you all, we had some free time a while back and processed a similar curved surface. How about this, please wait for a moment, I'll go ask the factory director if they can send over our workpiece and Master Hu Yang together."

  Zhu Tiejun had no objection, of course. Lin Zhenhua made a call to Xie Chunyu for instructions and then used the phone on her desk to dial Hanhua Factory. She found Kong Haijiang and asked him to send a car immediately to bring the unusual workpiece from the office of Hanhua Industrial Company, along with Hu Yang, to Nandu.

  Lin Zhenhua remembered that Hu Yang had always been unwilling to deal with the military, so when Yan Yuan and invited him to help at Changhong Factory last time, he was rejected. This Zhang Zhifang, if Lin Zhenhua didn't guess wrong, should have some connection with the military. And he came to Jiangnan Province, perhaps it was because of the information revealed by Yan Yuanhe.

  Perhaps it's time for Hu Yang to come out of the mountains. Someone as excellent as him shouldn't be buried in Hanhua Factory. But if he appears before Zhang Zhifang, will it bring good fortune or disaster?

  From Fenghua to Nandu, it's a 60-kilometer journey. An hour later, a truck from the Hanhua factory drove into the courtyard of the office building, and in the carriage was that unusual component. The movers, Zhong Rulin and Lü Baoan, jumped down from the truck, just as Lin Zhenhua and others were coming downstairs after hearing the news.

  "Kobayashi, we've brought you that part," said Zhong Rulin.

  Lin Zhenhua said: "Master Zhong has worked hard. By the way, where is Old Hu? Didn't I ask him to come together?"

  Zhong Rulin said: "Old Hu has gone out to saw boards, Director Kong is afraid that the leaders in the hall are anxious, so he let us come over first."

  They were chatting here, and Zhang Zhifang, Chang Qingbo, and Yu Wen Zheng also came over. Lin Zhenhua stepped forward to greet them: "Manager Zhang, Worker Chang, Worker Yu, that piece of equipment has been transported over, but it's too heavy and can't be unloaded from the truck. If you don't mind, could you go take a look on the truck?"

  "No problem." Chang Qingbo and Yu Wen Zheng replied in unison, and the two of them jumped onto the carriage with a swift movement. As soon as they got on, both of them let out a cry of surprise at the same time.

  "What's going on?" Zhang Zhifang, walking behind, heard the exclamations of his two subordinates and couldn't help but ask out loud.

  。

  "Manager Zhang, look." Chang Qingbo squatted in the carriage, pointing at the workpiece to Zhang Zhifang.

  The truck's rear baffle had been put down, and Zhang Zhifang stood under the car, also able to see the workpieces in the carriage. He only saw it at first glance, and a look of astonishment appeared on his face, which was no different from Lin Zhenhua's expression when he saw the drawings they took out earlier. His mentality was the same as Lin Zhenhua's: too similar!

  "Xiao Chang, do you think this is the same as what you guys designed?" Zhang Zhifang asked.

  Chang Qingbo carefully observed the workpiece and replied in a low voice: "Manager Zhang, this should be a 5-to-1 model. The purpose is completely consistent with our design, but there are some differences in the design thinking. I haven't done the calculations, but my intuition tells me that this design reduces the requirements for the host computer and can also increase the speed."

  He Wen Zheng stroked a curved surface on the workpiece with his hand, thoughtfully saying: "This place has a small arc surface, I don't know what it's used for. However, I feel that it is related to the turbulent flow problem that I have not solved yet. This arc surface may be used to eliminate turbulence noise. This point needs to be measured in practice to determine."

  Zhang Zhifang asked in surprise: "What? Are you saying that this thing is better than what you designed?"

  Chang Qingbo and Yu Wen Zheng nodded at the same time, saying: "Even if it's not better than what we're designing now, at least the designer has a unique way of thinking that we don't understand."

  Zhang Zhifang turned around and walked over to Lin Zhenhua, his eyes wide with curiosity. "Director Lin," he asked, "how did you people come across this thing?"

  Lin Zhenhua put on an air of nonchalance and said, "This thing is actually a test product, the main purpose is to verify whether our processing algorithm is correct."

  "Where did its design drawings come from?"

  "This is... " Lin Zhenhua recalled the excuse that Hu Yang had given him, and brought it out to respond: "This drawing was copied from an American mechanical processing manual."

  "This is impossible!" Zhang Zhifang said resolutely: "How can such a drawing appear in a public publication? I'm not afraid to tell you, such a map, in any country, is the most core military secret!"

  The last sentence was spoken in a lowered voice by Zhang Zhifang, but the people around him also heard it. As soon as this was said, Zhu Tiejun and others standing beside them were shocked, they looked at Zhang Zhifang, then at Lin Zhenhua, not knowing why things had changed to this extent.

  Lin Zhenhua nodded and said, "Manager Zhang, what you said may also make sense. Actually, this drawing was done by our Master Hu Yang, but I don't quite understand why he wanted to draw it either."

  "What about him?" Zhang Zhifang pressed on.

  "Our car arrived in a hurry just now, and he happened to be not in the factory, so he didn't come over. Otherwise, you can wait a bit, I'll call the factory to find him immediately and have him sent over by car."

  "Never mind!" Zhang Zhifang said, "I'll go with you to Hanhua Factory right now."

  "Ah?" This time Lin Zhenhua was surprised, "What's going on, Manager Zhang, is this person very important?"

  Zhang Zhifang nodded and said, "That's right, this person is likely to be a genius, someone we are extremely lacking. It's also possible... Alas, it can't be said clearly now. Let's go, let's leave immediately, I must see him immediately."