Intelligent Industrial Empire

Under Li Lu's dissatisfaction, the food quickly came to the table.

Zhao Xingbang and several people were aroused by Yun Fei’s words, and had no appetite for the table full of food. They only hope that Li Lu, Ren Zhiguo, and Yun Fei who are devouring them will quickly finish this luxurious meal, and then look for it. Talk about this place for three to five days.

For Li Lu, Zhao Xingbang knows best.In addition, this place is not suitable for a few people to talk about this aspect.So after the meal came, no one talked about this topic again.

Originally, Ren Zhiguo wanted to drink with Yunfei, but Zhao Xingbang prevented him when he let the waiter serve drinks, and Ren Zhiguo could only give up this idea depressed.In front of the harsh old man Zhao Xingbang, he really didn't dare to be presumptuous.

The non-drinking meal is over soon.Li Lu accused Zhao Xingbang and several old men, and said that she had made an appointment with her friends to go shopping, so she drove off.Ren Zhiguo also wanted to slip, but was stayed.

The waiter took a few people to the private room of the teahouse on the fifth floor to make tea for a few people, but Zhao Xingbang was kicked out.

"Xiaoyun, how about telling us in detail now?" Zhao Xingbang no longer had the composure of being a high-ranking person at this time. As soon as he drove the waiter out, he said anxiously.

"Uncle Zhao, don't you doubt that this hairy boy brags now?" Regarding Zhao Xingbang's performance, Ren Zhiguo, who was stunned by the old man who came out of the dead, was always excited.From small to large, no matter what happens, he can take it lightly. When he was beaten as a villain and locked up in the bullpen, the old guy with no discoloration on his face was actually like a prostitute who saw a prostitute dreamed of by Chaosi. , Can't bear it, how can't let him have the feeling of turning over!

"Go, go, go, while drinking tea, talking with adults, don't interrupt your children..." Zhao Xingbang stared at Yun Fei anxiously, and waved at Ren Zhiguo who was booing.

"..." Ren Zhiguo was speechless, and Yunfei was equally speechless.Once upon a time, the old Ren who was more than ten years older than himself became a child, and his child, whom everyone saw as an adult, became an adult?

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

In order to fool Ren Zhiguo, a guy who didn't understand CNC machine tools, I made everything simple.After thinking about it for so long, I realized that the solution I proposed can be processed to that precision in theory, but in fact, it cannot be guaranteed at all.

The difference between theory and practice is caused by many hardware conditions.For example, the accuracy of the stepping motor and the ball screw determines the control accuracy of the numerical control device.The domestic lead screw may be able to achieve it, but for a four-axis machine tool, it is difficult for a stepper motor to control the four-axis linkage, and there is no way to guarantee accuracy.

Therefore, a machining center with four-axis linkage must be controlled by a servo motor.The servo motor must have a position detection device and a pulse-emitting device.The delay of the feed pulse signal, the precision of the position detection device, the error of the feedback pulse, etc., are all in the early stage and cannot be overcome.

"What?" Ma Ji didn't believe that a child like Yun Fei could know more than those who have been engaged in CNC machine tools for more than ten years, but when he saw that his superiors didn't say anything, he only knew what his superiors thought. Can faintly express their dissatisfaction.

"I think this is too simple. Since the old man left, I have been thinking about how to add PMC axis modules to the three axes to implement the fourth axis function. What can be obtained in China, basically The above is the stepping motor. The indexing control of the stepping motor to the rotary table depends on the accuracy of the stepping motor itself, which affects the indexing accuracy of the table during the processing..." Yunfei sees a few With a blank face, he stopped and waited for the digestion of several 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 with glasses, about 47 or 8 years old, asked suspiciously.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 an assistant. Yun Fei couldn't help but call it.

"My name is Zhang Jun, and I’m in charge of transmission..." Zhang Jun didn’t care about Yun Fei’s ignorance of his name, let alone Ren Zhiguo deliberately didn’t introduce him at the beginning, just introduced, Yun Fei can’t remember him. I can only blame myself for not having the ability.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 stepping motor is controlled by pulse signals. The frequency of the pulse signal controls the speed of the speed, and the amount of the pulse signal controls the rotation angle of the motor. If you want to control the rotation accuracy of the fourth axis by controlling the pulse signal, it is not impossible to achieve , But that 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 control the linkage between the other three axes and the fourth axis." Yunfei explained.

"Industrial chip..." Zhao Xingbang, Ma Ji, and Zhang Jun sighed at the same time.A face of loss.

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

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

They have always studied machine tools controlled by stepper motors. After all, this is simple.Servo motors, they know that foreign high-precision machine tools and large-scale 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 stepper motor, how can they disperse their energy to engage in high-precision CNC machine tools controlled by servo motors!

There are already many research institutes and machine tool companies in China that are engaged in research in this area, but after so many years, I have not heard of anyone who 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 system is said to be controlled by a power stepper motor or an electro-hydraulic servo motor. The control accuracy directly depends on the accuracy of the motor and the screw rod, but because there is no position detection device, although the work is stable and easy to master, the accuracy and speed are improved All have been restricted.” Yun Fei began to literacy against a group of people who have studied CNC machine tools for more than a decade.

These most basic things, twenty years later, even a technical secondary school student majoring in CNC can answer them clearly.

"The closed-loop control system is equipped with a position detection device on the moving parts of the machine tool. It is not only high in accuracy, but also fast. As for the semi-closed loop control, the position detection device is installed at the end of the drive screw, and the position of the executive part is Indirect measurement is not only convenient for debugging, but also stable. It is mainly used for..." Yun Fei is like a theoretical teacher in a technical school, eloquently explaining these most basic things to a few people.

After explaining the basics of literacy, Ren Zhiguo fell asleep curled up on a wicker chair, drooling.A few older students are taking notes quickly.

"Well, Xiaoyun, let's talk about the four-axis thing now?" Zhao Xingbang has now completely lost that kind of bullying, and pitifully begged Yun Fei to ask.

He had completely believed what Ren Zhiguo had relayed.As to whether it can be obtained, it is just a matter of time.

The biggest problem is the identity of Yun Fei.The better Yunfei's performance, the more lost Zhao Xingbang. After all, the research on CNC machine tools is still in the confidential stage in China.Although the research is very inferior in the eyes of the young man in front of him, he can't just put Yun Fei in front of him or bring Yun Fei into the research institute.

Since the Department of Mechanical Engineering of Huaqing University and the Capital No. 1 Machine Tool Factory joined forces to engage in CNC machine tools in 58 in China, many companies have developed a style of CNC machine tools, but they died due to various problems.Coupled with the great turmoil in the following ten years, many researchers in this area lost the news.

Yun is not what this kid understands, and Zhao Xingbang dares to doubt in his heart that there will definitely be a powerful private research team behind this guy, and their progress has surpassed most people.

But is this possible?

Thinking of Yunfei's young age, he not only has the ordinary machine tool operation technology that amazes the masters, but he is especially good at CNC machine tool processing.In the name of doing foreign trade processing, Kmart has a lot of high-precision parts processed by Kmart's company. I heard that this young man Yunfei did it.

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

"If there are sufficient technical personnel, materials can be guaranteed, and the funding chain is continuous, there should be no problem within three years." For the unidentified military person in front of him, Yun Fei did not dare to say too much.

"Three years...how much money is needed?" Although it takes a long time, it can still be afforded. 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. The military's shortage of military expenditure is well known. If too much research funding is needed, it can only be put on hold.

"At least seven or eight million yuan..." Yun Fei's words caused everyone to take a breath.

Seven or eight million, all the research on CNC machine tools in the whole country added together, I don't know if there can be such a number.

"Xiao Yun, are you the director of a CNC machine tool research institute?" Zhao Xingbang's heart sank to the bottom.For such an outstanding talent as Yunfei, especially his understanding of CNC machine tools, he didn't want to give up. He first brought the person to the research institute, and then slowly engaged in it. There will be a day.Therefore, he said something that shocked everyone.