King of Industry

  Chapter 530 Essential Steps: Spindle Flaw Detection

   Zhao Guoyang and this subordinate of "Xingtai International" finished their meeting, and it was almost early morning.

  Thinking that everyone will have to work tomorrow morning, he hurriedly asked everyone to go back to rest.

  As for herself, Zhang Yufang arranged to live in an empty dormitory on the tenth floor.

   After receiving a quilt from his cousin Zhao Qian at the door, Zhao Guoyang suddenly remembered something.

   "By the way, Xiaoqian, I'm free these two days. I'll ask Teacher Zhang to accompany you to set up a mobile phone. Firstly, it's necessary for work; secondly, it's convenient to contact the second uncle and second aunt."

   "Uh..." Zhao Qian froze for a moment, opened her mouth, but did not speak after all.

Zhao Guoyang naturally understood the reason for her hesitation, so he patted her on the shoulder with a smile and said, "Don't worry, you are now a reserve cadre of the company, and it is only natural that you are equipped with a mobile phone. In this regard, I am not Give you special treatment."

   Seeing Zhao Qian relieved, Zhao Guoyang waved to her and said, "Okay, let's go to rest early. Xiaoqian, I know your abilities very well. You will be fine if you study hard and work hard."

  After hearing what her cousin said, Zhao Qian clenched her fists, nodded vigorously, watched Zhao Guoyang enter the room, and then slowly turned and left.

  …

  In the next few days, Zhao Guoyang basically focused all his attention on the "SMS company".

   After Zhao Guoyang made a decision on the establishment of the mine hoist project, there was no suspense.

  In the past few days, Li Zhaohe and Zhao Siyan led technicians from the Technology Department and the New Product R&D Department of the "SMS Company" to conduct disassembly research on a domestically-made mine hoist that they had already purchased.

  Actually, Zhao Guoyang had given Zhao Siyan early on the design idea of ​​the first mine hoist in his factory.

  However, there is still a difference between theory and practice. Although there is no problem with his design ideas, it still needs a lot of verification and data support if it wants to be transformed into real objects.

  The only thing you don’t need to worry about is the electronic control system of the mine hoist.

  Because the patent applied by Zhao Guoyang has been approved by the state.

   Coupled with the presence of Dinghaishenzhen like Mr. Ji, there must be no problem.

   While the technicians of "SMS Company" were busy dismantling and researching the mine hoist made in China, Professor Ji and the students were not idle either.

  They visited the libraries of Aurora University, Songjiang Jiaotong University and other institutions of higher learning these days, and found a lot of information about mine hoists.

   For this kind of heavy machinery, the students have a relatively systematic and comprehensive cognition and understanding, and they are no longer in the state of half-knowledge.

  Seeing that tomorrow is the weekend again, on Saturday morning, Zhao Guoyang called everyone together again and held a project progress seminar.

  The scale of this meeting is completely different from the first meeting.

  In addition to the three company leaders Zhao Guoyang, Li Zhaohe, and Zhao Siyan, almost all the technicians in the new product research and development department and the technical quality department are present.

  On the Peking University side, Professor Ji and six students were also sitting in the conference room alone.

  As the chairman of the company and the initiator of the "drilling hoist" project, Zhao Guoyang is naturally sitting in the middle position, with Li Zhaohe and Zhao Siyan beside him.

  Originally, Zhao Siyan wanted to give up the position to Ji Chongxuan, but she declined.

  According to what Elder Ji said, he was a guest from afar, so he couldn't take the lead, so he sat alone on one side with the students.

   After seeing that everyone was seated, Zhao Guoyang first said loudly: "Okay, everyone is here, then let's start!"

Opening the notebook in front of him, Zhao Guoyang said calmly: "The main purpose of today's meeting should be clear to everyone before. It is to study and discuss the precautions at the beginning of the design of our 'mine hoist' project, as well as the current situation. work progress."

   Having said this, Zhao Guoyang turned his head to Li Zhaohe and asked, "Director Li, how is the dismantling and analysis work going on in the technical department these days?"

  Li Zhaohe straightened his back and said vigorously, "Mr. Zhao, the dismantling is almost done. We have also recorded its working principle and the structure of each component."

   "Next step, we only need to integrate all the links, and then we can officially enter the design stage!"

  Zhao Guoyang gave a "hmm", turned his head to Zhao Siyan and said, "Minister Siyan, do you have any doubts about this project in your new product development department?"

  After hearing Zhao Guoyang's question, Zhao Siyan shook her head and said, "No, Mr. Zhao. Our new product development department has gone through all the information fed back by the technical quality department."

   "Basically, it can be confirmed that with our company's current technical level, it is possible to carry out the production of 'mine hoists'..."

  Zhao Guoyang let out a "huh", and his eyes fell on Ji Chongxuan and the students again.

   "Mr. Ji, you and your classmates have checked a lot of information these days. Do you have any questions about the implementation of the 'Mine Hoist' project, or do you have anything to add?"

  Ji Chongxuan himself is an expert in electromechanical aspects. On the "mine hoist", he only pays attention to the electronic control system.

   In this respect, Zhao Guoyang's patent of "DC all-digital new electronic control system" has been confirmed by him, and it has definitely reached the first-class level.

  So in other respects, Ji Chongxuan will not express much opinion.

  After hearing Zhao Guoyang's question at this time, he turned his attention to Yuan Qinghua and the others and said, "Xiao Yuan, Liu Yan, you all heard Mr. Zhao's question, right?"

   "If you still have questions, please raise them as soon as possible, don't wait until the project is officially launched, and then mess yourself up!"

  After Ji Chongxuan finished speaking, Yuan Qinghua and the other students turned their attention to Tang Wanru.

  When everyone was collecting information together these days, this "Xiaojiabiyu" Jiangnan girl showed a persistence and thirst for knowledge that were completely different from her appearance.

  Although she is only a graduate student in the Department of Materials, Tang Wanru's mechanical attainments are not low at all.

  After everyone inquired, her classmate Liu Yancai told others that Tang Wanru's undergraduate major was mechanical design, manufacturing and automation.

   That is to say, this girl who looks like a "little bird and a person" turned out to be a graduate student admitted by interdisciplinary studies. This was a very remarkable thing in the early 1990s.

  Seeing everyone's eyes turn to her at this time, Tang Wanru said cautiously: "Mr. Zhao, at the last meeting, you gave me the solution to the safety problem of the main shaft."

   "After consulting some information, I have confirmed that your statement is completely feasible."

   "In terms of the choice of spindle material, we can indeed use low-carbon alloy steel such as 20CrMnTi, 20Mn2B, 20Cr or nitrided steel such as 38CrMoAL to replace ordinary bearing steel."

   "However, after consulting the relevant information, I found that even if better materials are used, the damage of the main shaft is sometimes unavoidable..."

   Speaking of this, Tang Wanru said without worry: "I have always been worried that the quality of the main shaft will become the biggest hidden danger of our 'mine hoist'?"

   "About this problem, do we have a solution or avoid it?"

  After Tang Wanru finished speaking, some technicians in the meeting room all looked at her with surprise and appreciation.

  The technicians of "SMS Company" may not all have a bachelor's degree, but they have been engaged in the development and research of heavy machinery, especially mining machinery, for a long time, and their understanding of mechanical equipment must be much better than ordinary college students.

  At this time, Tang Wanru's question is about the new project of "mine hoist", but it is also applicable to other mining machinery.

  In fact, the problem of spindle damage widely exists in products such as heavy machinery and construction machinery.

   Tang Wanru's question can be said to hit the nail on the head, and it immediately made everyone look at her with admiration.

  Similar to everyone's reaction, Zhao Guoyang also gave Tang Wanru an appreciative look.

   "Student Wanru raised this question well. No matter how the material of the main shaft changes, no matter how good the material is, there is no 100% guarantee that it will not wear out."

   "Under such circumstances, flaw detection for the main shaft is an essential step."

   "Spindle flaw detection?" After hearing this, Tang Wanru showed a clear expression.

  Zhao Guoyang said "hmm" and said: "That's right! The main shaft is prone to cracks under a large cyclic load for a long time. Under unknown circumstances, if it deteriorates further, it will gradually lead to fatigue fracture."

  "This kind of crack often appears in the part with the greatest cyclical stress. For example, at the shaft shoulder, interference fit, key connection, near the oil injection hole, etc."

   “To identify the danger zone for fatigue cracks, we need preventive flaw detection of the main shaft.”

   "In this regard, after our hoist is designed, we will go through a series of experiments to determine the service life of the main shaft."

  "Any customer who has purchased our products must conduct flaw detection on the main shaft of the hoist strictly according to this service life."

   "In addition, on the main components of our hoist, we also need to determine its limit load through theory and a large number of tests. If it exceeds this limit load, flaw detection must also be carried out!"

  When Zhao Guoyang said this, everyone's faces showed relief.

  Seeing Tang Wanru's expression of relief, Zhao Guoyang said with a smile: "Student Wanru, regarding the method of flaw detection of the main shaft of the hoist, the ultrasonic flaw detection method and the magnetic particle flaw detection method are usually used internationally."

   "If you are interested, you can read an article in the third issue of "International Construction Machinery Journal" in 1989. The title is "On the Flaw Detection of the Main Shaft of Mine Hoist"..."

  Tang Wanru was stunned for a moment, then nodded her head again and again.

  Now she has the utmost admiration for this young Mr. Zhao.

   This person can name such a specific article in the "International Construction Machinery Journal", there is no doubt that his knowledge is genuine and full of gold.

  (end of this chapter)