Three months is neither long nor short, but for Shen Huan and Sun Chengming, it is long enough.
But fortunately, they still have to take the train back to Zhonghai on weekends, and sometimes they have to report to their superiors.
Three months passed quickly, and the construction of the new conventional submarine was more than half completed, and it was just waiting for the large side-inclined seven-bladed propeller to be transported back to the shipyard for the final assembly.
One day at the end of July, the first large oblique seven-bladed propeller processed by the No. 3 Propeller Factory using a five-axis linkage CNC machine tool was finally completed.
Now wait for the final inspection, and if it passes, this big guy can be shipped.
The leaders of the third propeller factory, as well as Shen Huan and Sun Chengming, all came to this large Dongzhi five-axis five-linkage CNC machining machine tool early.
At this time, in the middle of the machine tool lies a large guy with a diameter of more than four meters, which is a large side-inclined seven-bladed propeller that took three months to process.
Thanks to this five-axis five-linkage CNC machine tool, otherwise there is really no way to process.
You must know that the propeller is a key component of the submarine, and the machining accuracy directly affects the noise control and navigation stability and speed of the submarine, but unfortunately there is no domestic five-axis machine tool, and if the new conventional submarine is built on a large scale in the future, this machine tool is not enough!
Although there are also shipbuilding factories in China, how can they succeed in the development of such high-end CNC machining machine tools?
Shen Huan looked at the yellow, orange and orange big guy in front of him, and the excitement in his heart!
In the past three months, he and Sun Chengming have stayed up a lot of nights for this big guy, and they have also helped the third propeller factory solve a lot of technical problems in the processing process.
After on-site testing, the accuracy of this large side-inclined seven-bladed propeller has reached the ultra-high (S-level) accuracy.
Suddenly the people present couldn't help but burst into tears, three months of hard work was not in vain, this propeller was processed for three months, creating a miracle, after all, this is a large side-inclined seven-bladed propeller, its processing difficulty is far more than those ordinary cargo ships with four-blade and five-bladed propellers.
At present, there are only a few high-precision CNC machine tools with five-axis linkage in China, and it is too difficult to independently develop five-axis linkage CNC machine tools with intellectual property rights, and there is no hope at present.
After three months of processing, a lot of tools are also lost, so the processing cost of this big guy is very high.
Shen Huan also suddenly remembered that Lin Miaoyu mentioned to him a few days ago that her mother has now changed her career to ship supporting equipment and acquired a marine electronics factory, and now it seems that she is not on the right track, Shen Huan is thinking that if her mother-in-law can open a factory specializing in processing and manufacturing marine propellers in the future, it will definitely be very profitable.
Of course, the premise is that there is enough advanced processing equipment, as well as good enough technology, so that you can make money.
Shen Huan just thought about it for a while, after all, he didn't open his own factory, he didn't have the idea of opening his own company now, and he didn't have that capital.
Shen Huan and Sun Chengming also reported the good news to their superiors, this huge propeller will be shipped tomorrow morning, and after it is pulled to the Jiangnan Changxing Shipbuilding Group, the general section of the new conventional submarine will be closed, including the installation of the propeller.
In the evening, the third propeller factory also had a small celebration, and Shen Huan and Sun Chengming didn't dare to drink more, because they would escort the big guy back to Zhonghai tomorrow!
The next day, the big guy with a diameter of more than four meters was hoisted onto a large special truck under layers of wrapping, Shen Huan and Sun Chengming and the two of them also followed the big truck back to Zhonghai, while the other two took the train back.
Nothing happened along the way, and it was very smooth to arrive at Jiangnan Changxing Shipbuilding Group.
Since this huge propeller is a secret thing, Jiangnan Changxing Shipbuilding Group did not have any ceremonies here, and this big guy was sent to the assembly workshop just like those ordinary marine propellers.
After completing this arduous task, Shen Huan had just come back and was called over by Feng Haibo.
General Manager's Office of Jiangnan Changxing Shipbuilding Group.
Feng Haibo said excitedly: "Xiao Shen, I have worked hard for you this time!"
Ensuring the node, the construction progress of our boat has been greatly ahead of the Wuchang Shipyard, and I believe that we will be able to undertake more military ship construction tasks!
” Shen Huan hurriedly said: "Mr.
Feng, in fact, it's not hard, compared to the comrades in the technology center and the craft room, I can be regarded as a tourist this time!"
” Feng Haibo laughed and said: "If it's really like traveling, then it's great!"
This reminds me of the past, when I was as young as you, I participated in a foreign aid mission and went to Goryeo, which really can't be called tourism, and we went to teach disciples at that time, but now that I think about it, it's really not easy!
” Shen Huan also knew that the foreign aid mission was said to be a request from Goryeo to China at that time, and then China provided Goryeo with a complete set of military industrial projects free of charge, in fact, one of the projects was to provide Goryeo with 12 conventional submarines.
At that time, it was mainly through the construction of a submarine assembly plant, and then the supporting equipment was transported over for assembly.
This arduous task was undertaken by the Jiangnan Changxing Shipyard, which had to deliver the semi-finished products and supporting equipment of 12 conventional submarines within three years, and also sent technicians to Goryeo to guide the submarine assembly work.
In more than five years, the Changxing Shipyard in Jiangnan sent a team of more than 200 people, divided into more than a dozen groups, to Goryeo to guide the Goryeo people in submarine assembly, and Feng Haibo was one of the technicians.
Goryeo is different from Bangzi, because it is relatively backward, so there is nothing to travel at all, and the shipyard is generally a relatively remote place, so the working environment at that time can be imagined.
It should be much worse than Shen Huan going to supervise the propeller this time.
You must know that it is not so easy to teach students, at that time, the Goryeo shipyard could only build small boats of several hundred tons, with poor equipment and low technical level, and they were completely blank for the construction and assembly of submarines, so Shen Huan could also imagine what kind of scene it was.
There were several foreign aid missions like this earlier, but it was a pity that Shen Huan was not reborn to that time, and he couldn't experience that kind of life.
Perhaps in the future, the new 022 missile boat will have the opportunity to be sold abroad, and even the production technology can be sold, so that there is an opportunity to go abroad to experience what life is like for foreign aid.
But now, the 022 missile boats are still being designed and developed, and the most important thing is the pulsating production line, which must not be sold to others casually.