"Not your credit? Could it really be a technique that Yun Fei, a bastard, got from abroad? He basically has nothing to do with foreigners, where did he get these skills? Li Lu was really surprised when she heard Sun Lin say this.

Was it really that he was blindfolded from the beginning? That's not right! If it was really a foreign technique, when he started to say this by himself, Yun Fei would not be full of displeasure, and Ni Lishuang would not be like a cat with its tail stepped on.

"Could it be that the Soviets made this up?" Just like Yun Fei said, Li Lu also didn't believe that these engineers in various industries who had never been in contact with CNC could complete the production of samples from theoretical design to test and improvement from a blank slate in less than a year. If this is the case, the entire Soviet Union and China, who have been engaged in CNC machine tools all their lives, can go to see Grandpa Mao.

"How so? As far as the two CNC milling machines you are looking at in front of you, the research direction and some necessary parameters are all designed by Yun Fei, this kid, we and those Soviet engineers are just refining his abbreviated assembly design, and many of them are the improvement plans he proposed......" Sun Lin said this, he was a little embarrassed, and kept touching his nose with his hand.

"He? How does he understand the design of CNC machine tools? Li Lu felt that she must have been deceived by the old man. This old man didn't know what benefits Lu Dao had for receiving Yun Fei's bastard, so he helped Yun Fei say good things and put gold on Yun Fei's face.

"Why can't he understand?" Hearing that Li Lu, a woman who seems to be a rival in love, but doesn't act very well, looks down on her omnipotent brother Yun Fei and wears underwear, Ni Lishuang is not happy.

Li Lu was full of doubts at this time, and he didn't want Ni Lishuang to quarrel at all, a young man less than twenty years old, actually knew how to design CNC machine tools than an academician of the National Academy of Sciences who had been engaged in CNC machine tool research for decades close to seventy, how could this be?

"Gollum ......" really when Li Lu wanted to ask Sun Lin what was going on. The sound coming from her stomach reminded the others of the time.

In the early summer, it will not be dark until almost eight o'clock in the evening, although it is still very bright outside, but the watch on the wrist clearly tells everyone that it is now past seven o'clock.

Li Lu still ate a little bit indiscriminately before getting on the plane, and when he was in Rongcheng at noon, he was faced with a table full of dazzling dishes, because he was thinking about how to make Yun Fei give up the carte blanche of the entire Pearl River Delta to Kamat, where would he have the appetite to eat?

"Boss......" Guderian saw Yun Fei beckoning Sun Lin and the two beauties to prepare to eat. I can't help but be anxious, I just looked for Yun Fei, the boss, to see what is in the assembly, no matter how to do it, the Z-axis of these two CNC milling machines has several tapers, if this problem is not solved, these CNC machine tools in the processing, the accuracy of positioning will at least have more than ten wire error.

"Old Gu, why don't you put this matter until tomorrow? Now is not in a hurry for this moment, we are assembling a CNC milling machine for the first time. The main thing is to accumulate experience and lay the foundation for mass production after the machine tool is finalized in the future......" Yun Fei heard Guderian's words and patted his head, such a short period of time. was so troubled by Li Lu that he forgot that he came to the CNC milling machine, or Guderian found himself.

Li Lu also remembered at this time that the reason why he knew that Jiuyi Heavy Industry had started the production of CNC milling machine prototypes just now was because this Soviet man ran to his own people to find Yun Fei to help solve some problems and so on......

"Xiaoyun, let's eat later. You better help find a way to solve the problem first, solve the problem as soon as possible, and your CNC milling machine will be able to face the ......market one day earlier," Li Lu said to Yun Fei with a mocking face.

It turned out that Guderian, a Soviet, found Yo Yunfei and asked him to help solve the problem. She didn't pay much attention to it at all, and she didn't think deeply about it. Now that Sun Lin, the old man he was familiar with, said this, Li Lu began to wonder, could it be that Yun Fei had asked someone to say hello before he came recently, and asked them to do this deliberately in front of him? If you want to see what kind of magical skills Yun Fei this kid has, especially looking forward to exposing the conspiracy of Yun Fei's bastard, so that he will be embarrassed, Li Lu feels that it will not be a problem to eat later at this time.

Yun Fei couldn't help but be angry when he saw the ridicule on Li Lu's face.

The tiger is not powerful, you are really a sick cat! You have to be shocked, otherwise you really don't know the level of technical workers in China!

At this time, Yun Fei himself was also hungry, since Ni Lishuang was discharged from the hospital, although the two did not live under the same roof, Ni Lishuang still gave Yun Fei the habit of eating on time, and when the time to get off work at six o'clock every day, Ni Lishuang would appear outside the door of Yun Fei's office with a steaming meal. I've been accustomed to a stomach that will be filled when I see it for months, and now it's no longer able to resist as before.

Ni Lishuang never felt that going to work was more important than serving her brother Yun Fei. No matter what Yun Fei said, she wouldn't listen, and she would leave at half past four in the afternoon every day and go home to cook. For her behavior, no one in the entire factory dared to speak up, joking, if she offended the future boss, then don't mix in Jiuyi Heavy Industry in the future.

For this matter, Yun Fei said Ni Lishuang once, but as soon as Yun Fei said it, Ni Lishuang immediately wiped her tears, and Yun Fei could only acquiesce after making the most trouble.

"Brother Yunfei, I'll go to the cafeteria first to see what there is for you, and then I'll go back to cooking?" Ni Lishuang knew that Yun Fei must be hungry at this time, although everyone had lunch at four o'clock in the afternoon, but not a single table of dishes had been moved.

"You don't have to go back to do it, you go to the cafeteria to see if there are any ready-made, just get some......" Yun Fei said to Ni Lishuang.

At this time, when Ni Lishuang goes back to cook the meal, and when she comes back again, she will probably be hungry again.

People, it is easy to go from thrift to luxury, and it is difficult to go from luxury to thrift! How long has it been? Can't even bear such a little hunger in your stomach? Enduring the faint uncomfortable feeling in his stomach, Yun Fei walked towards the CNC milling machine where several workers were assembling the spindle.

"What's the problem?" Yun Fei saw that several people had not installed the spindle until now, so he turned to Guderian and asked.

He didn't plan to ask these questions to Sun Lin, who volunteered to be the on-site dispatcher. If you talk about design or other aspects, Sun Lin is a master and a grandmaster, and no one objects, but if you want to assemble this piece on site, maybe you can find a seventh-level fitter, which is more than Sun Lin, who is an academician.

There is still a big difference between theory and practice.

"The main thing is the Z-axis, when moving up and down, there will be a taper, no matter how we assemble it, how we repair the guide rail, we can't eliminate that taper......" Hearing Yun Fei's question, Guderian replied embarrassedly.

This young boss still has a thorough understanding of these techniques. Not to mention, many of these toolings that can improve assembly efficiency and ensure assembly accuracy are designed by this young boss.

"Remove the spindle first, the problems in the process of moving have not been solved, and it is useless for you to install the spindle!" Since we know the problem, we must find the cause of the problem.

The Z-axis of the CNC milling machine mainly relies on the hydraulic system and the ball screw to connect the spindle head of hundreds of kilograms to the column, otherwise with a few screws on the guide rail, it is impossible to let the spindle head of hundreds of kilograms fall down under its own gravity.

The three fitters quickly lifted out the precision spindle with dozens of steps on it that could illuminate the shadow of a person. The two spindles produced by Jiuyi Heavy Industry have spent a lot of time and energy, a total of five pieces have been invested, and there are only two finished products!

"You set up the dial gauge and let the Z-axis move up and down, and I'll take ......a look," Yun Fei said to the three assembly fitters from the Soviet Union who were waiting on the side.

After the fitter set up the dial gauge on the workbench, Yun Fei instructed the workers to slowly move the entire spindle head up and down in a manual way, while silently counting the rotation position of the dial gauge pointer.

"Grandpa Sun, what is he doing here?" Li Lu saw Yun Fei staring intently at the thumb size chart after that, and was puzzled, could it be that just staring at it could solve the problem that these workers couldn't solve?

"This is to measure the perpendicularity between the spindle and the table, and at the beginning of the movement, the watch will set a position and move from top to bottom, and if the watch does not move at all, it proves that there will be no error during the whole movement. However, this is only an ideal state, the first batch of two test machines we designed, the spindle moves up and down 500 mm, as long as the verticality is guaranteed to be within a trace of five, it is considered qualified...... "Sun Lin introduced the first test machine of Jiuyi Heavy Industry to Li Lu, and popularized the basic knowledge of machine tools to Li Lu.

Hearing Sun Lin's introduction, Li Lu couldn't help but smack his tongue.

The spindle head, which weighs hundreds of kilograms, moves up and down by more than 500 millimeters, and the trajectory generated during that movement must be controlled within the range of one-sixth of a hair!

"Okay, there's no problem with the assembly above, why don't you use your brains? Since no matter how it is assembled, there is such a gap, why don't you want to arrange the gap? Now the movement trajectory of this spindle head is deviated to the left, right? Put one side of the column up, tilt it to the right, and then you are taking measurements......" Yun Fei found out what the problem was, and at the same time gave advice on how to deal with it.

Under Yun Fei's command, soon, the column of the entire machine tool was tilted three and a half, more than two meters high, and it was tilted less than half a hair, which could not be seen by the naked eye at all, if it was not for the dial gauge calculated in μ, where could it be measured? (To be continued......)

PS: What about everyone's recommendation votes?