090 Complex surface machining

After chatting about the cupboard, Hu Yang asked, "Xiaolin, why are you free to come and sit with me today, is there something wrong?" ”

Lin Zhenhua said: "It's nothing, my heart is messy, I want to talk to someone." ”

"Is it because of the reporter?" Hu Yang asked, the matter interviewed by the reporter is known to the whole factory, Hu Yang has always cared about Lin Zhenhua, and he is naturally very concerned about this matter.

Lin Zhenhua nodded.

Hu Yang continued to ask: "What do reporters mainly cover and do they have an impact on you?" ”

Lin Zhenhua said: "The original intention of them to come was to understand the matter of room separation. I got a flat, and someone got red eyes and wrote an anonymous letter to the newspaper to sue me. However, after these two reporters talked to me, they didn't pay so much attention to the unit house, but began to pay attention to the contracting issue of our labor service company, and wanted to write an internal reference to report to it. ”

"Internal reference?" Hu Yang was taken aback, "How could you cause such a big mess?" ”

"Is it serious?" Lin Zhenhua asked rhetorically.

"What are those two reporters?"

"One young one is from Jiangnan Daily, and the other is older from the Jiangnan branch of Xinhua News Agency. The one who wants to report the internal reference is the Xinhua News Agency. ”

Hu Yang gasped: "Xinhua News Agency, Xiaolin, you have done this thing, but it is through the sky." ”

Lin Zhenhua said: "Lao Hu, I think it's good to be a genius." The state now encourages exploration, and Lord Deng proposed to cross the river by feeling the stones. For example, if the matter of our service company is left at the grassroots level, the cadres below may sympathize, but dare not take responsibility. If this can be done through the sky, maybe everything will be easy to do. ”

"It's unpredictable." Hu Yang said, "Xiaolin, you are so young, you don't know the power of political movements. ”

Lin Zhenhua said: "Lao Hu, I think that large-scale political movements should not appear again, right?" At best, there are some small repetitions, and with Master Deng at the helm, it should be fine. ”

Hu Yang hesitated: "Lord Deng's mind is very open. Yes, this kind of thing, it's really hard to say. Maybe it's because I'm a frightened bird, and I'm too timid. Xiaolin, what you are doing now, the contracting system, and the performance salary, were all things that would have been lost two years ago. Now, although the supervisors at all levels are turning a blind eye, if they do it again, it will be troublesome. If everyone covers this matter, it doesn't matter, and now that it's reported to the internal reference, I'm afraid everyone can't cover it if they want to. ”

Lin Zhenhua said: "Lao Hu, I feel that China will not engage in sports anymore, don't worry." ”

Hu Yang smiled bitterly: "I'm not as optimistic as you, we are all old athletes, and we are afraid of sports." ”

Lin Zhenhua can fully understand Hu Yang's concerns, in that era, I am afraid that no one except for the cross-border people dared to assert that China would not engage in sports again. Speculation about future movements is limited to large or small movements, and "no movement" is not an option.

Lin Zhenhua couldn't explain his understanding of the future to Hu Yang, so he had to bite the bullet and say: "Old Hu, I'm also out of the way, [***] member, you must not be afraid of cutting off your head, not afraid of going to prison, not afraid of your wife divorce......"

"You kid, you can't learn from anyone, if you don't learn from the Gang of Four." Hu Yang was amused by Lin Zhenhua, because this quote from Lin Zhenhua had already become a joke.

"Lao Hu, you are very idle now, you actually have time to help me make furniture? What, are all those books finished? Are there any new books in demand? Lin Zhenhua diverted the topic and asked casually.

As soon as he mentioned reading, Hu Yang's spiritual head came again, he took Lin Zhenhua's hand with his paint-stained hand, and said: "Xiaolin, you came just in time, I read the book "Complex Surface Processing" you bought for me these days, and I was very inspired." ”

Saying that, he didn't care whether Lin Zhenhua was interested or not, so he picked up a pile of paper from nowhere, pointed at Lin Zhenhua and said: "Xiaolin, you see, a curved surface like this is traditionally impossible for us to process with a machine tool, because we can't design the path of machine tool feeding." When encountering such a curved surface, we can only use manual processing, relying on workers to file out little by little with a file, not to mention the production efficiency, the key is that the workpiece filed in this way, surface roughness, residual stress and other indicators can not meet the design requirements...... Do you understand? ”

Lin Zhenhua understands this, in addition to the shape of machining, machining is also particular about the processing process. Even if the shape of a part machined by a high-speed machine tool is exactly the same as that of a hand-filed part, the physical energy can be very different. He nodded and said, "I understand, you go on." ”

"I've been thinking about this question for a long time. These days, look at your book "Complex Surface Machining", which talks about how to use the principle of envelope to divide the machining process of a surface into several times, each time the feed movement of the workpiece goes into a specific curve, and after repeating many times, the machining surface we require can be formed. I have used the finite element analysis method you taught me, and then used the computer to calculate it, and I have simulated such a machining process. You see, this is the process file I wrote. ”

Lin Zhenhua took a bunch of drawings given to him by Populus Hu for a while, and asked hesitantly: "Lao Hu, according to the processing technology you said, the workpiece must not only have forward and backward and up and down feed movements on the gantry milling machine, but also add its own rotation, which is equivalent to the machining process of a five-axis machine tool." ”

"That's right!" Hu Yang slapped his thigh, he turned his face to Qin Ying and said, "Xiao Ying, take a look, I said that Xiao Lin must know how to do it, right?" In a word, it is heaven-shattering. ”

"Don't, Lao Hu, how can we have a five-axis machine tool?" Lin Zhenhua asked, "The five-axis machine tool is restricted in Batumi, and now Sino-US relations are in the honeymoon period, and it seems that I haven't heard of any unit that can buy it, right?" ”

Hu Yang smiled: "Xiaolin, this is the question I want to tell you. With this design, I only need to make some small modifications to the existing machine to imitate the effect of four axes. Of course, even if it is a four-axis, our motor can't keep up, the precision screw can't keep up, the precision bearing can't keep up, and it still can't reach the accuracy of foreign machine tools. But don't forget, we have some people, we have senior mechanics with unique skills, and their experience can make up for the lack of machines. ”

"Let me see." Lin Zhenhua according to the idea of Populus euphratica, continued to study the process documents written by Populus euphratica, he saw that in many of the work links that should have been automatically realized by the five-axis machine tool, Populus euphratica has added the elements of manual intervention, including tool setting, correction of the center of the circle, micro feed, etc., simply put, this is equivalent to the worker is assisted by the machine tool, knife by knife cutting, if the worker's technology is superb enough, can ensure that each step of the work is accurate in place, then it can indeed achieve the effect of five-axis machining, accuracy, It may even be higher than a normal five-axis machine.

"Lao Hu, you are really a god." Lin Zhenhua was really convinced.

"How about it, Manager Lin, can you find a chance to give it a try?" Hu Yang looked at Lin Zhenhua hopefully and said, "Just use my drawing to try your hand, and all kinds of processing methods are included." ”

"What kind of artifact are you?" Lin Zhenhua took the drawings drawn by Populus euphratica and asked with a frown.

The workpiece on this drawing looks like the blades of an electric fan, but is a bit larger. The entire blade is twisted into a complex surface, which can no longer be reflected in the drawings, and the curves can only be described by some strange equations. Such drawings, workers must not be able to understand, they can only according to the process documents written by Populus euphratica, line by line processing, each step has specific scale requirements, as long as these requirements are met, the entire surface is finished.

Hu Yang seemed to be a little shy about the drawings he had drawn, and he said sneeringly: "Xiaolin, this thing is just an experimental prop, mainly to test the feasibility of the process." As for the drawings, I copied them from the book you gave me, so they don't have much use. ”

Regarding Populus euphratica's explanation, Lin Zhenhua was naturally a little skeptical. But he looked at it for a long time, and he couldn't think of any place where such a strange workpiece would be used, maybe it was really as Hu Yang said, the purpose of this workpiece was designed only to test the feasibility of the processing process, otherwise, how could it be so complicated?

"Lao Hu, how are you going to try?" Lin Zhenhua asked.

Hu Yang said: "I think you are now also a feudal official, and you should have some power." Can you ask the metalworking workshop to help you make it in the name of your service company? Ordinary workers can't do this, they must be Peng Gang, Zhou Houcheng, and Sun Changyuan. ”

Lin Zhenhua counted with his fingers: "Hehe, millers, lathes, fitters, and technical elites in the metalworking workshop, let you sweep them all." ”

"I've been in the factory for many years, and I still know whose technology is what." Hu Yang Road.

"Well, if I talk to the factory director, it will be our task to serve the company, and I guess the factory director will agree. Master Peng and Master Sun were originally hired by our service company, but they were only lent to the factory for use. Lin Zhenhua said with a smile.

"Another difficulty is the four-axis control circuit, which I can imagine, but I can't design. I've heard you say that you have a Beihang student studying electronic engineering, can he do automatic control? Hu Yang asked.

"Teacher Wei?" Lin Zhenhua said, "He is purely engaged in electronics, and he is not very proficient in automatic control." But it's not a big problem, I'll do it with him, he will do the electronic part, I will do the transmission part, and the two stinkers will be able to do more than half of Zhuge Liang. ”

"I'll count it too." Hu Yang said.