"Yes, if you want to make these parts, you need CNC machine tools. Our country manufactured a CNC machine tool in 1958. At that time, we were on the same starting line as the island countries and the United States.
In the 1960s, I visited the island country for inspection. Their variety of precision machine tools of the same type was not as comprehensive as ours. At that time, they did not have gear grinders, thread grinders, high-precision cylindrical grinders, etc. They only had high-precision coordinate boring machines and high-precision measuring devices.
(Mitsui Seiki)
They are better than us in many aspects, but there are many companies in the entire machine tool industry, such as Hitachi, Ikegai, Toshiba, Makino, Toyota, Mazak and other companies, whose manufacturing processes and management are better than ours. Their finishing and assembly have been under constant temperature purification.
Factory production to ensure quality.
At that time, there were two very famous companies in the machine tool industry in our country, one was the Shanghai Machine Tool Factory, and the other was the Kunming Machine Tool Factory. The main reason was that they had a group of technicians and skilled workers with good technical attainments before liberation.
Later it played a very important role.
The former is responsible for the R&D and manufacturing of gear grinding, gear shaping cutter grinding, thread grinding, high-precision cylindrical grinding, etc.; the latter focuses on coordinate boring, marking machines, marking rulers, circular gratings, long gratings, and synchronous sensor measuring devices.
production; at the same time, a nationwide collaboration was adopted to develop and produce worm gear auxiliary machines, indexing plate master machines, high-precision screw auxiliary machines, etc., which laid a solid foundation for the development of functional components of precision machine tools. However, as the country's situation changed later
drastic changes, industry
They are no longer valued by the country, and skilled workers have also abandoned their skills. The most important thing is that this inheritance is gone and they cannot keep up with international trends. Thirty years have passed in a flash. Look at others abroad.
It is simply earth-shaking. I heard that rotary engines are used in cars in island countries. This kind of engine was just a legend when I studied it. But now everyone is using it. Tell me, how can our country compare with them?
?It’s incomparable!”
In Liu Lang's eyes, Xiong Huaizhi was a serious old man who was unsmiling and few people could feel his emotions. But now, his angry expression was filled with helplessness and unwillingness.
Yes! Listening to what Xiong Huaizhi said, the country's manufacturing industry was still very strong at the beginning of the founding of the People's Republic of China. In many aspects, it was no worse than that of foreign countries, and in some cases it even surpassed them. However, due to various reasons, since the 1960s, the country's manufacturing industry has been very strong.
The manufacturing industry has stagnated, and those who are technically proficient
Many workers have been criticized, and some have been demoted. The entire training system has completely collapsed. However, those developed countries abroad are developing rapidly, and all kinds of advanced equipment are being manufactured.
Over the years, the gap between the two sides has become extremely huge.
In fact, after 20 or 30 years, the country did not attach much importance to manufacturing. The most typical example is the lack of attention to skilled workers. You must know that although the manufacturing of precision instrument parts relies more on instruments, this
It contains the experience of several generations or even more than a dozen generations of skilled workers. It is they who continue to explore at work and finally smelt better products.
Materials are used to build advanced equipment. For example, in the Nordic country that specializes in manufacturing watches, every watch is handmade and can be purchased for tens of thousands or even hundreds of thousands or millions. This is not a gimmick. Those who make watches are
The skills of craftsmen passed down for generations are unparalleled. In their hands, watches have become works of art. This is the ability of the craftsmen.
"Professor Xiong, you are right. Our country has fallen far behind in the past 20 to 30 years, but I also believe that as long as our country pays attention to it, the country's manufacturing level will improve."
Liu Lang comforted the other party.
"It's easier said than done! If many people are like you, I believe this will happen quickly. But look at our country now. If nothing else, the entire engineering major only recruits twenty or thirty students every year. So,
What can students do? If you look abroad, the number of engineers in their universities is at least dozens or hundreds of times more than ours. The difference is huge, too huge."
Xiong Huaizhi sighed.
"Well, by the way, Professor Xiong, what is the rotary engine you just mentioned? Why haven't I read it in the book?"
Liu Lang changed the subject and asked.
In textbooks, the engines are all piston engines. In terms of fuel, there are gasoline and diesel. Heavy oil is generally used on ships, and aviation gasoline is used on aircraft. According to the arrangement of the cylinders, they are single-row, double-row, and triple-row.
The cylinders of a single-row engine are arranged in one row, usually vertically. For example, the Hongqi sedan is in-line. The cylinders of a double-row engine are arranged in two rows. The angle between the two rows is called a V-shaped engine. The engine in front of you
The engine of this Fengtian car is arranged in this way. The three-row type arranges the cylinders in three rows to become a W-shaped engine.
These engines are essentially piston engines, and he has never heard of any rotary engines.
"Of course you haven't heard of it. This kind of rotary engine was not manufactured until the 1960s. Our textbooks were all compiled in the 1950s. They are still in use for nearly 40 years, so they are already out of date.
This kind of rotary engine is amazing. What makes it different from the piston engine is that the cocoon-shaped air chamber is divided into three parts. These three spaces continuously complete the air intake, compression, power generation, exhaust, and the rotor rotates once.
It does three times of work, which means that a single-rotor engine is equivalent to a 3-cylinder piston engine, and
The dual-rotor engine is equivalent to a 6-cylinder piston engine, so its power output is very continuous. In addition, the dual-rotor engine is much smaller and lighter than a 6-cylinder piston engine. Moreover, because the rotor always rotates in one direction, it does not reciprocate up and down like the piston.
movement, so its vibration and noise are much smaller.
In addition, structurally speaking, it does not require timing chains, camshafts, rocker arms, valves, valve springs, etc. The structure is simple, lighter in weight, and of course reduces vibration and noise."
Xiong Huaizhi talked about the advantages of the rotary engine like a treasure trove.
"Come, take a look. This is the drawing of the rotary engine. It was mailed to me by a foreign friend two years ago. It took a lot of effort and even the first machine department came forward."
Xiong Huaizhi took out a roll of drawings from a small iron box of his and unfolded it.
"It's really strange!"
Liu Lang was amazed when he saw the drawings. The drawings of this engine are very simple, much simpler than piston engines. Even though it is small, its output power is 20% stronger than piston engines of the same volume.
"Professor, since you have the blueprint and it is very simple, why not make one?"