Smart Industrial Empire

Under Li Lu's dissatisfaction, the food was served quickly.

Zhao Xingbang and the others were aroused by Yun Fei's words, and they lost their appetite for the food on the table. They only hoped that Li Lu, Ren Zhiguo, and Yun Fei who were devouring the meal would finish this luxurious meal quickly, and then find A place to chat for three to five days.

Zhao Xingbang also knows Li Lu best.In addition, this place is not suitable for several people to talk about this aspect.So after the food was served, no one talked about it anymore.

Originally, Ren Zhiguo wanted to have a drink with Yun Fei, but when he asked the waiter to serve the wine, Zhao Xingbang stopped him, and Ren Zhiguo could only give up this idea depressingly.In front of a stern old man like Zhao Xingbang, he really didn't dare to be presumptuous.

The dinner without drinking will soon be over.Li Lu pleaded guilty to the old men of Zhao Xingbang, said that she had an appointment with a friend to go shopping, and then slipped away.Ren Zhiguo also wanted to slip away, but was left behind.

The waiter took several people to the private room of the tea house on the fifth floor to make tea for them, but was kicked out by Zhao Xingbang.

"Xiaoyun, how about talking to us in detail now?" Zhao Xingbang no longer had the composure of a superior person at this time, and said anxiously as soon as he kicked the waiter out.

"Uncle Zhao, don't you suspect that this brat is bragging now?" Regarding Zhao Xingbang's performance, Ren Zhiguo, who had always been screaming at this old man who came out of the dead, became excited.From childhood to adulthood, no matter what happens, he can deal with it indifferently. The old guy who was labeled as a villain and locked up in the cowshed back then has not changed his expression at all. , I can't wait, how can I not make him feel like turning over!

"Go, go, go, stay and drink tea, adults talk, you children don't interrupt..." Zhao Xingbang stared at Yunfei anxiously, and waved at Ren Zhiguo who was booing.

"..." Ren Zhiguo was speechless, and Yun Fei was also speechless.Once upon a time, Lao Ren, who was more than ten years older than me, became a child, and I, the child in everyone's eyes, became an adult?

"Director Zhao, as for the parts you need to process, I just took a rough look at that time, and I mentioned to Lao Ren that the processing of those parts may not meet the requirements." Yun Fei was a little bit anxious about the old man in front of him. Excuse me.At this time, the fear of the old man in my heart was gone.

At the beginning, in order to fool Ren Zhiguo, a guy who didn't know much about CNC machine tools, he made everything very simple.After thinking about it for so long, I realized that the solution I proposed can theoretically be processed to that kind of precision, but in fact, it cannot be guaranteed at all.

The difference between theory and reality is caused by many hardware conditions.For example, the precision of the stepper motor and the ball screw determines the control precision of the numerical control device.The domestic lead screw may be able to achieve it, but for a four-axis linkage machine tool, it is difficult for the stepper motor to control the linkage of the four axes, and the accuracy cannot be guaranteed at all.

Therefore, the machining center with four-axis linkage must be controlled by a servo motor.For servo motors, it is necessary to have a position detection device and a device that emits pulses.The delay of the feed pulse signal, the precision of the position detection device, the error of the feedback pulse, etc., are all insurmountable mountains in the first stage.

"What?" Ma Ji didn't believe that a kid like Yun Fei could know more than those who have been engaged in CNC machine tools for more than ten years. Can subtly express their dissatisfaction.

"It's because I think this is too simple. After the old Ren left, I have been thinking about how to implement the fourth axis function by adding a pmc axis module on the three axes. What can be obtained in China, basically The upper part is the stepper motor, and the indexing control of the stepper motor and the rotary table depends on the accuracy of the stepper motor itself, which affects the indexing accuracy of the table during processing..." Yun Fei saw several With a dazed look on his face, he stopped and waited for the digestion of the few people.

"Xiaoyun, according to your opinion, wouldn't it be better if the stepper motor is directly connected to the transmission of the rotary table?" A middle-aged man wearing glasses and about 47 years old asked doubtfully.For CNC machine tools, although no breakthrough has been made, the engineers brought by Zhao Xingbang are quite familiar with the understanding of these basic technologies.

"This is?" Before the meal, Ren Zhiguo only introduced a few people brought by Zhao Xingbang as assistants, and Yun Feizhen couldn't stop calling them.

"My name is Zhang Jun, and I'm in charge of transmission work..." Zhang Jun didn't care at all that Yun Fei didn't know his name, not to mention that Ren Zhiguo didn't introduce him deliberately at the beginning, but he did. Yun Fei couldn't remember him You can only blame yourself for your incompetence.After all, I have been studying this for more than ten years, and I am not as good as a young man...

"The operation of the stepper motor is controlled by a pulse signal. The frequency of the pulse signal controls the speed of the speed, and the number of the pulse signal controls the rotation angle of the motor. It is not impossible to control the rotation accuracy of the fourth axis by controlling the pulse signal. , but it requires an industrial control chip with powerful control functions. The industrial control chip not only needs to be able to control the operation of the fourth axis, but also needs to control the linkage between the other three axes and the fourth axis." Yun Fei explained.

"Industrial control chip..." Zhao Xingbang, Ma Ji, and Zhang Jun sighed at the same time.His face was full of disappointment.

"As for the division of CNC machine tools according to the control method, you should be clear?" Yun Fei also felt uncomfortable with the sighs of several people.Changed the subject.

"This, we really don't know." Zhao Xingbang blushed a little for Yun Fei's question.

For a long time, they have been studying machine tools controlled by stepping motors. After all, this is simple.Servo motors, they know that foreign high-precision machine tools and large heavy-duty CNC machine tools have begun to eliminate the use of stepper motors.However, the domestic foundation is too weak, they don't even understand the stepping motor, how can they divert their energy to develop high-precision CNC machine tools controlled by servo motors!

There are already many domestic research institutes and machine tool companies engaged in research in this area, but after so many years, no one has made breakthrough progress.

"According to the control method, the CNC machine tool control system is divided into three types: open loop, closed loop, and semi-closed loop. Except that the drive and control of the open loop system are realized by stepping motors, the other two require servo motors to control. Open loop Although the executive mechanism of the system is controlled by a power stepping motor or an electro-hydraulic servo motor. The control accuracy directly depends on the accuracy of the motor and the screw, but because there is no position detection device, although the work is stable and easy to grasp, the accuracy and speed are improved. They are all restricted." Yun Fei began to literacy education for a group of people who have studied CNC machine tools for more than ten years.

After 20 years, even a technical secondary school student majoring in numerical control can clearly answer these most basic things.

"The closed-loop control system is equipped with a position detection device on the moving parts of the machine tool. It not only has high precision, but also has a fast speed. As for the semi-closed-loop control, the position detection device is installed at the end of the transmission screw to monitor the position of the actuator. Indirect measurement is not only convenient for debugging, but also has good stability, and is mainly used for..." Yun Fei is like a teacher of a technical school theory class, explaining these most basic things to several people endlessly.

After explaining the basics of literacy, Ren Zhiguo curled up on the rattan chair and fell asleep drooling.And several older students are taking notes quickly.

"Here, Xiaoyun, let's talk about the four-axis thing now?" Zhao Xingbang had completely lost that domineering manner now, and begged Yunfei pitifully.

He has completely believed what Ren Zhiguo told him.As for whether it can be done, it is only a matter of time.

Another biggest problem is the identity of Yun Fei.The better Yun Fei performed, the more frustrated Zhao Xingbang was. After all, the research on CNC machine tools was still in the secrecy stage in China.Although the research was very low-level in the eyes of the young man in front of him, he couldn't just put it in front of Yun Fei, or bring Yun Fei into the research institute.

In China, since 58, the Department of Mechanical Engineering of Huaqing University and the Capital No. [-] Machine Tool Factory jointly started to develop CNC machine tools. There have been many companies that have developed a trend of CNC machine tools, but they have been aborted due to various problems.Coupled with the great turmoil in the next ten years, many talents who studied this area lost their news.

Zhao Xingbang dared to doubt what this kid Yunfei knew. Behind this guy, there would definitely be a powerful private research team, and their progress had already surpassed most of them.

However, is this possible?

Thinking of Yunfei's young age, he not only has the ordinary machine tool operation skills that amazed those old masters, but he is especially good at CNC machine tool processing.Under the banner of foreign trade processing, Kamat has a lot of high-precision parts that are processed by Kamat's company. It is said that this young man, Yunfei, has done it all.

"Xiao Yun, if we provide full support, how long do you think it will take to get the additional fourth axis?" Zhao Xingbang didn't take notes.His responsibilities and not only the technology, but also the urgent need for a four-axis machining center, now he has to temporarily avoid the issue of Yunfei's identity.

"If there are enough technical personnel, the materials can be guaranteed, and the capital chain continues, there should be no problem within three years." Regarding the unidentified military person in front of him, Yun Fei dared not speak too harshly.

"Three years...about how much money do you need?" Although the time is long, it is still affordable. The question of how much money is needed now is what Zhao Xingbang is most concerned about.Everything in the country is tilted towards economic construction, and the shortage of military spending is well known. If too much research funding is needed, it can only be shelved.

"At least seven to eight million..." Yun Fei's words made everyone gasp.

Seventy-eight million, all the CNC machine tool research in the whole country is added together, I don't know if there is such a number.

"Xiaoyun, are you the director of a CNC machine tool research institute?" Zhao Xingbang's heart sank to the bottom.For such an excellent talent as Yunfei, especially his understanding of CNC machine tools, he didn't want to give up. He first pulled people to the research institute, and then slowly worked on it. There will always be a day when it will be done.So, he said something that shocked everyone.

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