How to measure the quality of a wire drawing machine?

1. Pay-off: the pay-off of the wire, for the whole steel bar drawing machine, its control does not have too high precision requirements, most of the steel bar drawing machinery, the operation of the pay-off is realized by the frequency converter to drive the pay-off frame, but there are also some double frequency conversion control of the steel bar drawing machinery, but also directly through the wire drawing link of the wire tension draft into the steel bar drawing machine, to achieve free pay-off.

2. Wire drawing: The wire drawing link is an important part of the steel bar wire drawing machine. Different metal materials, different silk varieties and requirements, the wire drawing link is very different.

3. Take-up: The working speed of the take-up link determines the production efficiency of the whole steel bar drawing machinery, and it is also the part of the whole system that is difficult to control. In the take-up part, the commonly used control technologies include synchronous control and tension control to realize the winding of metal products.

Wire drawing machine, also known as wire drawing machine, drawing machine, English name is drawing machine, is a widely used mechanical equipment in industrial applications, widely used in machinery manufacturing, hardware processing, petrochemical, plastics, bamboo and wood products, wire and cable and other industries.

It belongs to the pre-processing equipment for the production of metal products such as standard parts, the purpose of which is to draw the wire rod or bar produced and transported by the steel manufacturer to the metal products production enterprise such as standard parts through the drawing machine, so that the diameter, roundness, internal metallographic structure, surface finish and straightening of the wire or bar meet the raw material processing requirements required for the production of standard parts and other metal products.

Many times, Shi Wenlong found that he could only solve the problem for a few pages.

I will go on to the four-year undergraduate degree of Beihang University to answer

We are from the School of Instrument Science and Optoelectronic Engineering of Beihang University, so we naturally want to recommend the School of Instrument and Optics.

The School of Instrument Science and Optoelectronic Engineering of Beihang University originated from the Department of Aircraft Equipment established at the beginning of the establishment of Beihang University in 1952, and was established in 1958 to meet the needs of the schoolTwo bombs and one satellite" inertial guidanceThe urgent need was proposed by Mr. Qian Xuesen as the founder of China's inertial technologyMr. LimsThe "Aeronautical Gyroscope and Inertial Navigation" Laboratory was established, and the aeronautical gyroscope and inertial navigation major was developed based on it. In 2003, the School of Instrument Science and Optoelectronic Engineering was formally established by the Department of Measurement and Control Technology and Instrumentation of the School of Automation, the Department of Aerospace Navigation and Control of the School of Astronautics, and the Institute of Optoelectronic Technology of the School of Astronautics.

Now there are 3 academicians in the whole college, you must know that there are not many academicians in the whole school, at least above the average **. Among them, Fang Jiancheng, the vice president of Beihang University, used to be the dean of our college, and now he will chat with us ordinary students to solve our doubts. Academician Feng Peide is now almost 80 years old, and he is still fighting on the front line of scientific research, as the leader of the laboratory, guiding many students in the laboratory to carry out scientific research.

In 2007, the discipline of "instrument science and technology" was rated as the first batch of national first-class key disciplines, in 2012 it was rated as a key discipline of the Ministry of Industry and Information Technology, and ranked first in the country in the 2012 first-level discipline evaluation of the Ministry of Education. Among the first-class disciplines released by the Ministry of Education, Beihang Instrument Science and Technology also has an A+ score.

Since 2006, he has presided over and won 15 national awards, including: 9 National Technological Invention Awards, 4 Science and Technology Progress Awards, 1 China Patent Gold Award, and 1 Teaching Award. Among them, in 2007 and 2008, he presided over the first prize of the National Technological Invention Award for two consecutive years.

Beihang is reading, let's answerBeijing University of Aeronautics and Astronautics, formerly known as Beijing Institute of Aeronautics and Astronautics, is a professional university dedicated to serving our country's aerospace industry. The school has always been to aerospace colleges and universities as its own brand, of course, aerospace majors are the school's trump card majors, naturally it is very good, for our country to send a large number of aerospace talents, such asAcademician Qi Fayun, chief designer of the Shenzhou spacecraft

However, Beihang University is not only a strong aerospace major, in terms of employment heat, the aerospace major is not as good as the information major, and the information major of Beihang University happens to be very strong The departments are all in the information category. Among them, 6 departments of computer science are cosmic majors, and similarly, 2 (electronic information engineering (automation) (software engineering (cyberspace security) majors will also involve a lot of programming thingsEmploymentThe aspect is still quite secure.

Now Beihang isBroad category admissionsThat is to say, when admitted to Beihang University, it will not be admitted according to the subdivided majors (such as electronic information, automation, etc.), but according to the departments and majors with similar overlapping parts in the research field, forming a large category, and recruiting students according to the major categories, so that after studying for a period of time, you can choose the major and department you want to continue studying according to your interests and achievements, (unlike us who want to change majors It is very difficult). To a large extent, it can avoid the consequences of not being interested in the profession caused by the blindness of filling in the volunteers. Thank you.

Graduates of the fourth year of Beihang University came to answer the questions

First of all, Beihang University now enrolls students in a large category.

What is calledBroad category admissions？In other words, in the past, students were recruited separately according to specific majors such as electronic information, computer science, etc., but now they areDivide similar types of majors into one broad categoryEnrollment is conducted by category. Beihang University's major enrollment is mainly divided into the following four categories:

Engineering Experimental Class (Aerospace), Engineering Experimental Class (Information), Science Experimental Class, Social Science Experimental Class。Of course, there's moreFlight technology, designWait.

Secondly, Beihang AirlinesEngineering majors are relatively strong

At present, Beihang University is still a typical engineering university, and the engineering majors are relatively stronger, among which the engineering enrollment of Beihang University is mainly divided into aerospace and information majors. Both of these categories are very strong, and if you have to compare them, generallyInformation majors are more popular, so the college entrance examination score should also be higher, especiallyComputers also belong to the information category。WhileMost of the aerospace majors are very old-fashioned, and they are also very good, thoughGenerally speaking, the breadth of employment is not as broad as that of information majors, so there is no information class of professional popularity.

Again,In the information class, the computer is the trump card

Beihang University's computer is notoriously powerful, and the universities with the most powerful computer majors are basically Tsinghua University, National Defense University of Science and Technology, and Beihang University. And now artificial intelligence is also on the rise, such a big trend has made the computer profession even more popularThe employment rate is also quite highI want to apply abroad in the futurecsProfessional further study is also very promising. AbsolutelyThe electronic information major is also very goodIn fact, network security is separated from the electronic information major, and the 5G that is now popular belongs to this professional field, and I want to apply abroad in the futureeeProfessional further study is also very promising.

Finally,As long as you are interested and willing to endure hardships, you will definitely be able to learn real talents in Beihang

The employment rate of Beihang is also generally very high。Therefore,Following your interests is the most important thing!

As18-level master's degree student of Beihang Institute of Robotics

Beihang is second to none in ChinaEngineering colleges.

It has a deep engineering foundation and technical precipitation.

According to the information released by the Information Office of the Ministry of Education, Beijing University of Aeronautics and Astronautics entered"First-class university construction university".

Category A) (36 in total). Seven disciplines, including mechanics, instrument science and technology, materials science and engineering, control science and engineering, computer science and technology, aeronautics and astronautics science and technology, and software engineering, were entered"Double first-class".

List of construction disciplines.

I think if you are interested enough in engineering, Beihang University will be a good choice for you. Whether it's traditionalMechanical Engineering, Materials Science, Electronic Information

and other majors, which are still more popular in this year's developmentSoftware Engineering, Electronic Information Engineering

Beihang University has strong teachers and abundant resources to support your development.

As you further your studies, you will be able to enter different laboratories for in-depth study and research according to your research direction and interests. Taking the School of Mechanical Engineering as an example, it is divided into the Department of Mechanical and Electrical Engineering, the Department of Mechanical Design and Automation, the Department of Material Processing and Control, the Institute of Robotics, the Department of Mechanical Manufacturing and Automation, etc., and the team led by each teacher also has different research directions to meet the needs of studentsPersonalized development

In addition, Beihang University currently adopts undergraduate admissionBroad category admissions

Methods, i.e., engineering experimental classes (aerospace), engineering experimental classes (information), science experimental classes, and social science experimental classes. After one year of training, students enter the professional college to continue their studies, and at the end of the second year, they choose their favorite major in the professional college. Moreover, in the future learning process, Beihang still supports students to change majors according to their own interests and encourages students to develop freely.

Thanks for reading, I hope it helps.

It should be said that with a relatively solid and rigorous academic style, there is basically no "water" major in the science and engineering majors of Beihang University. As shown in the figure below, it is the ranking of various majors of Beihang University in the country, among which instrument science, aviation and astronautics are the first in the country, and mechanics, control, and computer are also extremely high in the country.

These two majors are actually engaged in "computer science and technology", and to put it bluntly, they are both programmers. Although Beihang University is not ranked first in the country in computer science, because computer science is very popular now, and various enterprises are in great demand, the salary income is very considerable, much higher than that of traditional mechanical majors.

Aircraft design and aircraft power engineering are both in aeronautics and astronautics science and technology, and instrument optoelectronics is in instrument science and technology, both of which are the absolute top teaching and scientific research levels in China.

Of course, because the employment scope of the above majors is relatively narrow and belongs to traditional industries, the salary level cannot be compared with that of computer majors (the monthly salary of computer master's students is 20,000 yuan, and the monthly salary of engine master's students is 5,000), and the cost performance is not as high as that of computer-related majors.

For example, if the computer major is not popular in ten years, what will you do? What if the Chinese engine develops in a few years and the personnel treatment improves? Right?

So in general, you still have to be responsible for yourself and think carefully about your future before making a decision.

First of all, to quote the description of the official double first-class construction report of Beihang University: in the 2018 "Ranking of World-class Subjects", the discipline of aerospace engineering of Beihang University was rankedNo. 1 in the world, instrument science ranked fourth in the world. Five fields, engineering, materials science, physics, chemistry, and computer science, enter the ESI discipline, and engineering entersESI 1 thousandth of a discipline, materials science and computer science enteredTop 100 in the world

However, the answer is that the Lord isStudents of Beihang UniversityIt is important to emphasize that Beihang is self-proclaimed".Research UniversityThat is to say, Beihang attaches great importance to scientific research, and Beihang University is among the 985 universitiesThe status of undergraduate and postgraduate education should be discussed separately。There is a significant difference between undergraduate education and graduate education, which is basically based on curriculum, while graduate education is based on scientific research. Other respondents mentioned various rankings on the Internet, or the Ministry of Education's double first-class subject rating, all attach great importance to the quantity and quality of research projects, and more reflect the level of graduate education of Beihang University.

WhileUndergraduate educationOne of the most important factors is what Beihang obtainsEducation GrantsWith the gradual development of the double-first-class construction of Beihang University, the education funding obtained is obviousVery impressiveTarget. The picture below shows the interior of the State Key Laboratory of Virtual Reality Technology and Systems of Beihang University, which shows its height.

Secondly, there is another important point to emphasizeTeachers are the main force in educationTo evaluate the status of a school, the first thing is to evaluate the position of the school's teachers among all schools. Beihang has brought together to23 academicians of the Chinese Academy of Sciences and the Chinese Academy of Sciences, 31 chief scientists of the "973" Program, 56 "Changjiang Scholars" distinguished professors, 55 winners of "National Science for Distinguished Young Scientists" and 3 national famous teachers. In 2018, 10 new 10,000 people were selected for the 10,000 Talents Program, 7 Changjiang Scholars Distinguished Professors, 8 National Outstanding Youth Awards, 6 Science and Technology Innovation Talent Promotion Program Winners, 15 National Outstanding Youth Programs, and 15 Young Scholars.

These teachers, regardless of their innovation ability or qualifications, are the most powerful cards of Beihang University. With these teachers, the comprehensive status of the top ten of Beihang University is undoubtedly stable.

I will go on to the four-year undergraduate degree of Beihang University to answer

I've seen a big guy this.

For example, the top two of the Ministry of Industry and Information Technology are equivalent to Qingbei of the Ministry of Education, but now this score is too low, and the universities of the Ministry of Industry and Information Technology are underestimated as a whole.

I think this may really be overblown, but I think Beihang will eventually progress to that.

At the beginning of the establishment of the school, I heard that they all passed the score line of Qingbei, and then they had to pass the political examination before they could enter Beihang, and if the political examination could not be passed, Qingbei could choose at will, that is, Beihang could not pass the exam, it was okay, Qingbei was waiting for you.

Personally determined to build the school on the anniversary of the War to Resist US Aggression and Aid Korea, except for the first batch of six, the previous national key construction has not been left behind, and the comprehensive national positioning can definitely be counted within two slaps (Harbin Gong is a slap). The national positioning can be said to be not inferior to China 5 and stable Chinese martial arts. The three awards are second only to Qingbei Zheha, how many schools can compare the scientific and technological output?

Manned spaceflight, large aircraft, computers, artificial intelligence, network security, precision instruments, manufacturing upgrades, the current number of key hot spots can be counted in addition to the universe gold almost all accounted for, scientific research and teaching strength is not to say, the weakest performance of the undergraduate admission rate is also in the top ten.

Beihang's various awards are indeed soft9 National Technological Invention First Prizes, and more than half of the 985 so far National Technology First Prize zero eggs. And most of it was acquired in the 21st century.

Now Beihang'sThe score line is also about 10th in the country, in terms of the quality of students, it is much better than most of the 985, and the scientific and technological strength is naturally able to keep up, otherwise how could the score line of Beihang rise and rise, in fact, it is not all due to regional factors.

Although Beihang University is usually ranked in the national university rankings of more than 20, Beihang University is a typical engineering school, which is seriously biased, and is naturally not as comprehensive as a comprehensive university.

There is a good saying that until mankind conquers the universe, aerospace will continue to be on fire.