Lin Zhenhua said "goodbye" to Zhen Hongyang, and then went back to the metalworking workshop. At this time, the end of work has passed, the roar of the machines in the workshop has stopped, the workers have gone home from work, and the whole workshop is empty.

Lin Zhenhua walked into the lounge of the handling class, took his clothes, locked the door and was about to leave, when he suddenly caught a glimpse of a delicate figure out of the corner of his eye, standing on the edge of an X62W universal milling machine, I don't know what he was busy with.

"Yang Xin." Lin Zhenhua walked over and shouted, suddenly remembering that Yang Xin had talked about teaching him techniques a few days ago. Now that all the workers in the workshop are off work, Yang Xin is still in the workshop, could it be that he is just waiting to teach him technology? Lin Zhenhua only felt ashamed for a while, he was only thinking about making money all day long, he was so sorry for this innocent little Lori.

"Brother Xiaohua......" Yang Xin turned his head, his eyes flashing with a hint of melancholy.

"That one, you're waiting for me, right? I'm really sorry, I'm not feeling well these days, uh, people, so I ran home after work, I didn't expect you to be waiting for me. Lin Zhenhua was thick-skinned and stumbled to make up nonsense.

Yang Xin replied weakly, "Oh, I didn't wait for you much. I saw you gone, and so did you. I think you might have something to do. ”

"That's it, I'm okay today, or Master Yang will teach me now. What is this mysterious machine in front of you for? Lin Zhenhua pointed to the milling machine and asked Yang Xin, and at the same time, there was some confusion in his eyes, which made people wonder if his head had just been hit by a car.

Of course, Yang Xin knew that Lin Zhenhua was pretending to be stupid, even if he didn't understand technology, he stayed in the metalworking workshop for more than a week, and he could still distinguish between lathes and milling machines. However, Yang Xin seemed to have something on her mind today, Lin Zhenhua's joke didn't make her feel easy, she just replied in embarrassment: "Brother Xiaohua, it's a bit unfortunate today, my master asked me to finish milling these six gears, I'm afraid I won't have time to teach you." ”

"Oh, that's great." Lin Zhenhua was relieved, but as soon as the words came out, he knew that he had said something wrong, and hurriedly added: "I mean, I'm fine, or you're busy with you, I'm here with you." ”

"Brother Xiaohua, you better go back first, I'll ...... I'm probably going to have to finish milling it late. Yang Xin blushed and said.

Lin Zhenhua scratched his head: "Won't it?" Isn't it just six gears? He took the drawings that Yang Xin put aside and looked at them, and said, "These six gears are ordinary gears, and they can be done in minutes." ”

"What do you mean by getting it done in minutes?" Yang Xin was very skeptical that Lin Zhenhua was speaking Chinese, she focused on Lin Zhenhua's grammar, and didn't notice that Lin Zhenhua could understand the drawings for a while.

"Well, this is the dialect of Yunnan, which means that it can be done very quickly."

"But...... But ......" Yang Xin said two but, the words couldn't be spoken, and the tears rolled in his eyes a few times uncontrollably, and then they dripped down with a click.

"Don't cry, don't cry, Yang Xin, what's the matter, what are you crying about?"

"My master also said it was very simple, but she told me twice that I didn't understand. She told me to adjust the indexing head, but I didn't understand how to adjust it. Yang Xin sobbed and cried.

"It's not a fault that you don't understand, right?" Lin Zhenhua was upset, "If you don't understand, you can continue to ask, and since you don't understand, how can she leave you to do it alone, where did she go?" ”

Yang Xin said that the indexing head is an accessory on the milling machine, when milling gears, workers should rotate the indexing head to ensure that several teeth of the milled gears are evenly distributed. Depending on the number of gear teeth, the number of turns of the rotating indexing head is also different, and some calculation problems are involved here. The mathematical knowledge required for this kind of calculation itself is not complicated, at most it is the knowledge of fractions and divisible, but some workers have a low level of education and are not good at mathematical thinking, so they feel that the use of the indexing head is still quite troublesome. Although Yang Xin has the education level of junior high school graduates, she does not belong to the type of students who have good math scores. Her master Jiang Tiemei's education level is even worse, and the use of the indexing head is limited to having experience and cannot be explained clearly, so it is reasonable that Yang Xin can't understand it.

"The master called me stupid, said I didn't care, and then she told me that if I didn't finish milling the six gears, don't go home. If I don't mill, she will go to the director tomorrow and say that she won't take me......" Yang Xin said this, almost crying loudly, but she was worried that the crying would be too loud and would be heard by people outside the workshop.

"This exterminator is too!" Lin Zhenhua scolded.

Yang Xin also doesn't know what an extermination master is, but listening to Lin Zhenhua's meaning, it seems that she is also a witch in Yunnan, and she is not a good person anyway. She took out a handkerchief and wiped her tears, and said to Lin Zhenhua: "Brother Xiaohua, you go back first, I'll figure it out myself, anyway, if I can't do it today, I'll think about it in the workshop for a night." ”

"Don't, don't." Lin Zhenhua said, "If you have difficulties, look for Xiaohua." Isn't it just a dividing head, I'll teach you. ”

"You teach me!?" Yang Xin's eyes widened even bigger than the scaling head, she would rather believe that Lin Zhenhua could pinch this pure steel indexing head into a steel ingot with her hands, and she didn't believe that he could set the indexing head to the correct position.

Helplessly, Lin Zhenhua said the nonsense of the dual-use talent again, in fact, no one had ever put forward this concept at that time.

"Have you really driven a milling machine?" Yang Xin finally turned from complete disbelief to half-belief.

"Make a place." Lin Zhenhua unceremoniously pulled Yang Xin, and his hand touched Yang Xin's arm, Yang Xin blushed, and hurriedly gave up his position.

Lin Zhenhua stood in front of the milling machine, was silent for a while, let the memories of the future come back to his mind, and then began to work. He shakes the handle and expertly snaps the workpiece onto the fixture. Then, he glanced at the drawing, selected a scale on the dial of the indexing head, and turned it without thinking. After turning the workpiece to the correct position, Lin Zhenhua started the milling machine, and the milling cutter made a cheerful squeak, cutting out black and shiny iron filings on the workpiece.

"Oh my God, you're more skilled than my master!" Yang Xin's feeling at this moment can only be described by the word shock. Lin Zhenhua's trip can be described as smooth, and there is not even a little stumbling in the middle. Yang Xin remembered that when the master was usually working, he had to break his fingers and count for a long time, which was as sharp as Lin Zhenhua.

Lin Zhenhua smiled proudly, he had studied milling for a whole summer in the internship factory of Huaqing University, and his master was a milling technician ranked among the best in the country. The apprenticeship appraisal given to him by the master afterwards read: He has a very high understanding of machining, and if he is placed in the factory, he must be a good worker. He still remembers the regretful look on his face when the master handed him the appraisal, as if to say, how can such a good worker become a graduate student, it's a pity......

Before Yang Xin could wake up from the shock, Lin Zhenhua had already removed the first milled gear from the fixture and put it in the finished box on the side. He stepped aside and said to Yang Xin, "Okay, it's your turn." ”

"Me?"

"Yes, if you don't do it yourself, when will you learn? Don't be afraid, I'll teach you how to do it. ”

Yang Xin had a trance-like feeling for a moment, as if she had returned to ten years ago, when the boy with the little snot said to her at any time: Don't be afraid, I'll teach you......

"When the workpiece is carded, the force of each jaw should be uniform, and after the card is finished, you can turn around to see if the shaft is offset...... Yes, that's it. The algorithm of the indexing head is as follows: divide the number of scales by the number of teeth of the gear, and then select the other scales for the remainder......"

Lin Zhenhua taught by word and deed, and guided Yang Xin hand in hand. He didn't realize anything about male and female defense, in later generations, he had taught undergraduates to do metalworking internships in the internship factory countless times, whether it was male or female, he taught it hand in hand, and never felt awkward. Of course, those post-80s and post-90s girls don't know that there is such a thing as giving or receiving kisses in the world, and they will not hesitate to stick to Lin Zhenhua to watch him, completely ignoring the close contact between some soft parts and Lin Zhenhua's body.

Yang Xin has never been held by a boy like this, and she can clearly feel the temperature of Lin Zhenhua's palm. This warm feeling made her feel a little shy, and at the same time felt a sense of security that made people feel grounded. She forced her mind not to think about those messy things, but to listen to Lin Zhenhua's explanation intently.

In the first gear, Lin Zhenhua guided her ten times and corrected five mistakes;

In the second gear, Lin Zhenhua instructed five times and corrected two mistakes;

The third gear, Lin Zhenhua only said one sentence;

The fourth gear, Lin Zhenhua did not say a word from beginning to end.

Yang Xin trembled and measured the gear with a caliper, which she had completely independent intellectual property rights, and when the width of the last tooth was measured, Yang Xin's face bloomed with a bright smile: "Success, success!" Brother Xiaohua, you are really amazing. ”

"Hehe, this seems to have been milled out by yourself, I didn't speak." Lin Zhenhua was humble.

"You're a good teacher!" Yang Xin said, "I don't understand what my master said. But as soon as you say it, I understand it all. It's still these things, and you're just better than her. ”

Famous teachers produce high apprentices, although Jiang Tiemei herself is a skilled worker, but her skills are boiled out by years of practice, and her surname is far inferior to Lin Zhenhua, teaching Yang Xin with such a technique can naturally only make Yang Xin feel miserable. Lin Zhenhua has a thorough understanding of the principle of machining, he knows at a glance what Yang Xin doesn't understand, and he can always give just the right hint, so Yang Xin has learned more in just one hour than she has learned in a week.

"There's one last gear, and when you're done with it, you'll be able to go back to dinner." Lin Zhenhua said with a smile.

"Don't worry, I'll do it in minutes." Yang Xin not only learned the milling knowledge taught by Lin Zhenhua, but also learned the "Yunnan dialect" he spoke.

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I've been watching milling tutorials for many years, and I don't know if there's anything wrong with that, and everyone is more tolerant of what is wrong.

10.15 Modification Instructions: Thanks to the "crisp and dripping" netizens who severely criticized Orange for not understanding machine tool operation, he pointed out that it is strictly forbidden to wear gloves for machine tool operation. After investigation, this is indeed the case, and it is hereby corrected to delete the sentence wearing gloves.