Guo Changfan stopped abruptly as he spoke.

Fu Xin was puzzled for a while, looked at Guo Changfan, and asked in a low voice, "Old squad leader, why didn't you say it!" ”

Guo Changfan replied with a wry smile: "Mr. Fu, what I say next may be the scientific work report, you can't talk about me, otherwise I won't add this!" ”

Fu Xin smiled helplessly and replied: "Old squad leader, you just hate me like this, I just made a little joke." ”

"Then I'll just say it!" Guo Changfan replied.

Immediately, Guo Changfan looked down, coughed twice, and said: "Everyone, the next words may be a little boring, I think it will be like a scientific work report......

Before Guo Changfan finished speaking, there was a burst of laughter below, and someone coaxed: "Director Guo, just say it!" We'll listen! ”

"That's what you said!" Guo Changfan smiled weirdly, "Then I'll say it!" I just communicated with Mr. Fu, and he also thinks he has to say! ”

There was another burst of laughter below.

"Ahem, point to point, point to point......" Fu Xin stopped with a shy face.

Waiting for the silence below, Guo Changfan coughed twice and said, "Continuing the previous topic, where did I go?" ”

Fu Xin coughed and reminded: "Director Guo, you said that CNC machine tools are typical mechatronics products!" ”

Guo Changfan nodded suddenly, "Oh, I remembered, speaking of which, I added that the basic components of CNC machine tools include processing program carriers, CNC devices, servo drive devices, machine tool bodies and other auxiliary devices. Let me also give you an overview of the basic working principles of each component.

As for the processing program carrier, when the index control machine tool is working, there is no need for workers to directly operate the machine tool. To control the CNC machine tool, the machining program must be compiled. Part machining program. Including the relative motion trajectory of the tool and the workpiece on the machine tool, process parameters, auxiliary movements, etc.

The process parameters are the feed, the spindle speed, etc. The part processing program is stored on a program carrier in a certain format and code. Such as perforated paper tape, cassette tape, floppy disk, etc., through the input device of the CNC machine tool, the program information is input to the CNC unit.

CNC devices are the core of CNC machine tools. Modern numerical control devices are in the form of CNC, CNC is the English Computer_Numerical_Control, this CNC device generally uses a plurality of microprocessors, in the form of programmed software to achieve numerical control functions, so it is also called software numerical control, English called Software_NC.

The CNC system is a position control system, which is based on the input data to interpolate the ideal motion trajectory. It is then output to the execution assembly to machine the required part. Therefore, the numerical control device is mainly composed of three basic parts: input, processing and output. And all this work is rationally organized by the computer's system program, so that the whole system works in harmony.

Input device, it is to input numerical control instructions to numerical control device, according to the different program carriers, there are different input devices accordingly. There are mainly keyboard input, disk input, CAD/CAM system direct communication input and DNC connected to the upper computer, that is, direct CNC input.

This kind of input is more advanced, and I also listened to Mr. Fu say that this input method is to save the part program in the higher-level computer. The CNC system receives subsequent program segments from the computer while machining. The DNC method is often used in the case of complex workpieces designed with CAD/CAM software and directly generated part programs.

Now the more common system is still the paper tape input form of the photoelectric reader.

The paper tape input mode can read the part program with the paper tape photoelectric reader to directly control the movement of the machine tool, and the content of the paper tape can also be read into the memory, and the machine tool movement can be controlled by the part program stored in the memory.

Information processing is the transfer of machining information to the CNC unit by the input device. It is compiled into information that can be identified by the computer, and is gradually stored and processed by the information processing part in accordance with the provisions of the control program. The position and speed instructions are sent to the servo system and the main motion control part through the output unit.

The input data of the CNC system includes: the contour information of the part (starting point, end point, straight line, arc, etc.), machining speed and other auxiliary processing information (such as tool change, speed change, coolant switch, etc.), and the purpose of data processing is to complete the preparation work before the interpolation operation. The data processing program also includes tool radius compensation, speed calculations, and the processing of auxiliary functions.

The output device is connected to the servo mechanism. The output device receives the output pulses of the combinator according to the command of the controller. And send it to the servo control system of each coordinate, after power amplification. Drive the servo system to control the movement of the machine according to the specified requirements.

The servo system is an important part of the CNC machine tool, which is used to realize the feed servo control and spindle servo control of the CNC machine tool. The function of the servo system is to convert the instruction information received from the numerical control device into the linear displacement or angular displacement movement of the machine tool execution parts after power amplification and shaping processing.

Because the servo system is the last link of the CNC machine tool, its performance will directly affect the accuracy and speed of the CNC machine tool and other technical indicators, therefore, the servo drive device of the CNC machine tool is required to have good rapid response performance, accurately and sensitively track the digital instruction signal issued by the CNC device, and can faithfully execute the instructions from the CNC device, improve the dynamic following characteristics and static tracking accuracy of the system.

The servo system consists of two parts: the drive device and the actuator. The drive device is composed of a spindle drive unit, a feed drive unit, a spindle servo motor, and a feed servo motor. Stepper motors, DC servo motors, and AC servo motors are commonly used drive devices.

The measuring element detects the actual displacement value of each coordinate axis of the CNC machine tool and inputs it into the numerical control device of the machine tool through the feedback system, and the numerical control device compares the actual displacement value fed back with the instruction value, and outputs the displacement instruction required to reach the set value to the servo system.

The machine tool host is the main body of the CNC machine tool. It includes mechanical parts such as bed, base, column, beam, slide, worktable, headstock, feed mechanism, tool holder and automatic tool changer. It is a mechanical part that automatically completes various cutting processes on a CNC machine.

When it comes to the main body of the machine tool, I will mention the advantages of the main body of the CNC machine tool compared with the traditional machine tool!

Compared with the traditional machine tool, the main body of the CNC machine tool has the following structural characteristics:

First. A new structure of the machine with high stiffness, high seismic resistance and low thermal deformation is adopted. The stiffness and seismic resistance of the machine tool host are usually improved by improving the static stiffness of the structural system, increasing the damping, adjusting the quality of the structural parts and the natural frequency, so that the machine tool body can adapt to the needs of the CNC machine tool for continuous and automatic cutting. Measures such as improving the structural layout of machine tools, reducing heat generation, controlling temperature rise and adopting thermal deformation compensation are adopted. It can reduce the impact of thermal distortion on the machine unit.

Second, high-performance spindle servo drive and feed servo drive are widely used. The transmission chain of the CNC machine tool is shortened, and the structure of the mechanical transmission system of the machine tool is simplified.

Thirdly, the transmission devices and moving parts with high transmission efficiency, high precision and no gap are adopted, such as ball screw nut pairs, plastic sliding guide rails, linear rolling guide rails, hydrostatic guide rails, etc.

The auxiliary device is the necessary supporting device to ensure that the function of the CNC machine tool is fully exerted, and the commonly used auxiliary device includes: pneumatic and hydraulic devices, chip removal devices, cooling and lubrication devices, rotary workbenches and CNC indexing heads, protection. Various auxiliary devices such as lighting.

Having said so much, I am also telling you that CNC machine tools are really close to the electronics industry, and such a promising product must not be missed!

Therefore, Mr. Fu has long put forward the slogan, we must vigorously develop machine tools. Because our company is poor in the machine tool industry, we now start from the simplest machine tool parts, and introduce domestic and foreign technology or advanced technology. Raise the level of our company's machine tools. ”

"Due to the strong support of Mr. Fu, I would like to tell you a good news that our company's current machine tool level is already in the forefront of China!" Guo Changfan said with a smile.

"Good!"

"Great!"

……

There was a round of applause below.

Guo Changfan smiled and read the reactions of the people below. Only then did he continue: "However, this is not enough, and you may not know. The level of machine tools in our country and the gap between the international one. It's just too big! For example, CNC machine tools. Our country has just begun to start, I dare to say loudly that our company's CNC machine tools, in China, is the leading level! ”

"But, you know? Our company's machine tools are only three-axis linkage CNC machine tools, and the so-called three-axis linkage generally refers to X, Y, and Z three axes that can realize synchronous related actions. Usually on the lathe, the X-axis refers to the left and right carriages, the Y-axis refers to the drag, and the Z-axis refers to the main axis. Three-axis linkage CNC machine tool, can only do some surface processing!

But do you know what level it is abroad? It's almost five-axis linkage abroad!

Don't underestimate the gap between this three-axis linkage CNC machine tool and the five-axis linkage CNC machine tool! Three-axis linkage, can only do some surface processing, but what about five-axis linkage? I'll tell Mr. Fu to me, and I will read this passage I recorded to everyone!

Five-axis linkage CNC machine tool is a kind of machine tool with high technology content and high precision specially used for processing complex curved surfaces, and this machine tool system has a decisive influence on a country's aviation, aerospace, military, scientific research, precision instruments, high-precision medical equipment and other industries.

At present, the five-axis linkage CNC machine tool system is the only means to solve the processing of impellers, blades, marine propellers, heavy-duty generator rotors, steam turbine rotors, large diesel engine crankshafts, etc. ”

"So stake! Oh my God, that's a big gap! "There are some people below who don't know about CNC machine tools, and they all exclaimed.

Then, immediately someone coaxed, "Mr. Fu, Director Guo, this CNC machine tool, we must vigorously develop it, this is too important for our country, if we can do it, this will be infinite for our country, the future of our company!" ”

"Well, let me say a few words!" Fu Xin said into the microphone, and the people below immediately held their breath and waited for Fu Xin's answer.

Fu Xin said in a deep voice: "The reason why Director Guo will say so much, is because I heard some objections in the company to our company involved in machine tools, and vigorously develop machine tools, I think, everyone has this kind of thought, it is normal, because many people's understanding of machine tools is limited to the four words of industrial machine tools, today I said so much, I just hope that everyone supports my decision!" I don't know if you support me? ”

As soon as Fu Xin's voice fell, someone below said loudly: "Mr. Fu, what I didn't say, this project, we support, this is our country, our company, too important, you can imagine, if our company makes the five-axis linkage CNC machine tool, how much the country's support for us will be, because this five-axis linkage CNC machine tool is too important for the country!" ”

"So, let's raise your hand now to vote on this project!" Fu Xin said with a smile, and after speaking, he himself took the lead in raising his hand.

Seeing Fu Xin's actions, the people below also quickly raised their hands! Without the slightest hesitation!

"It's all a group of enthusiastic patriotic young people!" Fu Xin looked at the reactions of these people, he was very satisfied, and couldn't help but sigh in his heart.

Subsequently, Fu Xin announced: "The machine tool project is passed!" ”

Fu Xin and Guo Changfan glanced at each other strangely, and then both of them burst out laughing. (To be continued......)