On the construction site on Academy Road, facing the questions raised by Wang Shouyi and Mao Feiming, Zhao Guoyang thought for a moment and said something.

"From the overall perspective, there is still a certain gap between our China lifting machinery manufacturing industry and the advanced foreign countries, which is mainly reflected in three aspects."

"First of all, the first aspect is that our design level is still relatively low, and there is a clear gap between our product technology development concept and foreign countries."

Zhao Guoyang explained in a 111th day: "At present, most domestic companies generally have problems such as not having a wide range of product types, lacking in-depth understanding of user processes, serious product convergence, and poor targeting."

"As far as I know, our lifting and transportation machinery design method in China mainly uses a single allowable stress method. In addition, the limit state method and the probability design method have been added to this basis to ensure the accuracy of design parameter selection, safety factor selection and structural optimization design."

"This also makes the products involved in our heavy machinery and equipment companies in China have many congenital shortcomings than others..."

When Zhao Guoyang said this, Wang Shouyi and Bao Feiming looked at me, and when I looked at you, you looked at each other in a flash.

The two of them had only known about domestic lifting machinery and equipment, and there was a difference in quality compared with foreigners. However, they did not know where this gap came from.

After listening to Zhao Guoyang's story, the two finally understood a little.

Without caring about the two of them, Zhao Guoyang continued to speak: "The second aspect is that compared with the advanced foreign level, our large-scale construction machinery and equipment such as lifting machinery are also much worse in terms of technology."

"Due to the late start and the low level of the basic materials industry, most of our country's lifting and transportation machinery products have problems such as poor quality of parts and backward technical and economic performance."

"In the final analysis, these problems are also the backwardness of our China in production technology."

"Give some simple examples. Our Huaxia is seriously lacking in high-precision processing equipment, with low reliability and poor performance of electrical components; the backward thermal processing technology has made our domestic casting and forgings of low quality, and the appearance of welded parts is not satisfactory..." Zhao Guoyang shook his head slightly and said the truth.

"In addition, the lack of testing instruments and equipment is also a major factor that restricts the improvement of our country's process technology level. As for some special manufacturing processes that represent the international advanced level, we have even difficulty in contact, let alone research and production."

"Researcher Zhao, you're right!"

Hearing this, Mao Feiming slapped his thigh and said, "Last time I went to the island country's 'Mitsubishi Heavy Industry' to negotiate business, I saw the general process of their lifting and transportation machinery production."

Mao Feiming sighed quite a bit: "Actually, I have visited several domestic heavy industry machinery factories. It's not that I'm unpatriotic, but to be honest, the production level of our domestic heavy industry enterprises is really incomparable to 'Mitsubishi Heavy Industry'..."

Hearing this, Wang Shouyi nodded sadly, looking speechless.

Seeing this, Zhao Guoyang coughed and slowly said, "Just as Mr. Mao said, there must be a big gap between us and the mechanical manufacturing level of developed countries."

"But I believe that as long as we adhere to the principle of reform and opening up, go out more and take a look, give full play to our own advantages, and work together to learn from the strengths of the barbarians to control the barbarians, there is a great opportunity to narrow the gap with developed countries in a short period of time."

Upon hearing this, Wang Shouyi glanced at Zhao Guoyang in surprise.

Although he heard Director Li Ru introduce Zhao Guoyang's identity, he did not know some of the young man's previous deeds.

Therefore, after hearing Zhao Guoyang's confident words, he felt a little unbelievable.

Zhao Guoyang could naturally see the doubts in Wang Shou's eyes.

He smiled and then returned to the point of saying: "Director Wang, Mr. Mao, the gap between our domestic lifting machinery manufacturing industry and the advanced foreign level in terms of reliability."

"With the development of modern industrial technology, the role of lifting and transportation machinery is becoming more and more important, and the functions are gradually increasing, while the conditions for use are becoming more and more stringent."

"This has increased the chance of failure of lifting and transportation machinery nowadays, and the consequences are unpredictable."

Zhao Guoyang talked jokingly: "At this stage, the problem of reliability of lifting and transportation machinery is becoming increasingly acute and has become the focus of product competition in the international market."

After listening to Zhao Guoyang's narration, Mao Feiming sighed: "Researcher Zhao, I have a deep understanding of what you said in the end!"

"Take our second-level construction company in Beijing as an example. Last year, we successively introduced twenty cranes and forty excavators from domestic manufacturers."

"But just one year later, the cranes and excavators we introduced have already experienced dozens of faults of size. Although some faults are only small problems, it also takes time and energy to solve this problem!"

Speaking of this, Mao Feiming couldn't help but point to the independent area on the construction site.

He said helplessly: "In contrast, the three cranes introduced by our second-level construction in Beijing have been used for so long, but there is no problem at all."

"From the eyes of us laymen, this foreigner's product is more than just a little clever than ours. It's a crushing advantage!"

Mao Feiming said gritting his teeth: "If this weren't imported equipment from abroad, the price was usually more than three or four times that of domestic products. I would have gritted my teeth to replace it with imported goods for everyone."

"Researcher Zhao, you should know that the mechanical equipment on this construction site has malfunctioned, and the problem is very serious. The suspension of work and the extension of the construction period are all trivial matters. If there is a safety accident, it would be too late to regret it..."

The loss and sadness in Zhuo Feiming's eyes made Zhao Guoyang feel a little sympathetic to him.

After Mr. Mao had finished complaining, Wang Shouyi next to him shook his head slightly and said, "Mr. Mao, although your words are biased, the truth is correct!"

"The safety hazards of our domestic lifting machinery and equipment are indeed a big problem!"

Wang Shouyi sighed: "In this regard, our Ministry of Construction has also communicated with Researcher Zhao and the Ministry of Machinery and Electronics Industry. He has also formed a joint assessment team and visited the construction site under construction."

"However, the results are almost the same. There was no problem with domestic lifting machinery and excavation machinery when they were just produced."

"But as the use time of mechanical equipment continues to increase, the frequency of failures will become higher and higher."

Wang Shouyi sighed and said, "We have reported this to several major heavy industrial giants in China. But they all replied, "They said that the machine is being used on the construction site, so how can it not be broken?"

Hearing this, Zhao Guoyang nodded and echoed: "That's right, in China, the fatigue use of machines is a widely-existing chronic disease."

"However, there are also problems with the quality of domestic lifting machinery equipment!"

Zhao Guoyang said, pointing to the crane that was operating there and said, "It's like this kind of bridge crane. Although our domestic heavy industry machinery companies have also been manufactured, their core technical level is not that true..."

"In this regard, there are many things worth learning from the practices of developed Western countries!"

Mao Feiming was most sad about the treasures on his construction site. He immediately asked: "Researcher Zhao, what is the strength of the technology of Western developed countries? Can these domestic companies really catch up?"

Zhao Guoyang said with a affirmative "well": "As customers from all over the world have increasingly high requirements for cranes, the development trend of bridge and gantry crane production technology has also changed a lot. This development trend is mainly reflected in three points."

"The first thing is the modularization and combination of design..."

Zhao Guoyang explained: "When Western developed countries are designing cranes, they have begun to use modular design instead of traditional whole machine design methods."

"They made the components, components and parts on the crane that are basically the same function, have multiple uses, have the same connection elements and interchangeable standard modules, and through the combination of different modules, they form cranes of different types and specifications."

Zhao Guoyang gave an example: "To improve the crane, you only need to improve it for a few modules. To design a new crane, you only need to select different modules to recombinate..."

"In addition, the production organizations of these heavy industry enterprises in the West have gradually changed from product management to module management. This model helps improve the performance of the whole machine, reduce manufacturing costs, and increase the degree of generalization."

"In simple terms, it means using parts with fewer specifications to form multiple varieties and multiple specifications series products to fully meet user needs."

Zhao Guoyang took a breath and continued: "The second point is to make the equipment larger and specialized."

"Due to the continuous expansion of the world's industrial production scale, the increasing production efficiency, and the gradually increasing proportion of material loading, unloading and handling costs during product production, the demand for large or high-speed cranes is also continuing to grow."

"At this stage, the crane's lifting capacity is getting bigger and bigger, and the working speed is getting higher and higher. Therefore, higher requirements are put forward for energy consumption and reliability."

"Now good cranes must not only be easy to operate and maintain, but also have good safety and high reliability. They also require excellent durability, failure-free, maintenance and economical use."

Zhao Guoyang said earnestly: "The diversity of modern industrial production methods and user needs has enabled the market for special cranes to continue to expand and the variety is also updated."
Chapter completed!