Song Weize was already dissatisfied with Du Youwen and asked him to come and apologize to Qin Zhenhua. Now, if Qin Zhenhua calls and complains, then Song Weize might actually kick him out of the R&D room for not obeying the command.
Therefore, now we can only agree to the other party's request.
etc.
"This torque converter has oil inside, why did you ask me to get it again?" Du Youwen realized, are you bullying me for not knowing technology?
If it is a hydraulic transmission system, including the gearbox, the oil must be drained before it can be disassembled. But this is not the case with the hydraulic torque converter. The lubricating oil is sealed and integrated inside, and it is intact inside.
You still ask me for it, aren't you deliberately looking for trouble?
"Before it was disassembled, there was oil inside. After it was disassembled, the oil inside must have been lost. Moreover, I also want to map and copy the same model of torque converter. Don't I need oil?" Qin Zhenhua
Said: "When you sent me samples, didn't you think of this level? Are you going or not?"
If you don't go, I'll call Song Weize. Qin Zhenhua made this gesture, and Du Youwen was at a loss: "Okay, then I'll go."
When Du Youwen left with the trolley, Qin Zhenhua was extremely excited and rushed towards the torque converter. This thing had only been seen in books and magazines before.
If we look at the direction in which the power is transmitted, it first passes through the housing, then enters the lock-up clutch, then the turbine, the guide wheel, and finally the pump wheel. It seems to be a very simple structure, and in the West in the 1950s
I started using it, but in China, I have been unable to get it right. The main problem is that the accuracy cannot be achieved.
This thing is very heavy, a lump of iron, with hydraulic oil inside. Qin Zhenhua doesn't expect to use his own strength to push it into the workshop. There are plenty of ready-made tools, so he can't even put it on a forklift.
He no longer cares about Du Youwen.
In the morning, I heard that Zhao Guodong had gone to negotiate, and then Zhang Xiangyang brought the machine tool back and placed it in the most spacious position in the workshop, waiting for Qin Zhenhua to operate it.
However, there is no need for it now. After all, the first step in surveying and mapping imitation is to dismantle the surveying and mapping.
When I found out that it was Du Youwen who sent it, of course I had to use his labor force again unceremoniously. How amazing are the people in the R&D room? They are not allowed to listen to my orders? Now I am helping you.
As for whether Song Weize asked Du Youwen to apologize to him, Qin Zhenhua really didn't know. Qin Zhenhua didn't like such a guy either.
"This thing looks really strange." Wang Erzhu on the side said to Qin Zhenhua.
When he heard that Qin Zhenhua was going to enter the R&D room, Wang Erzhu felt happy for Qin Zhenhua, but also a little disappointed, because he knew that he would never be able to get in.
Now, Qin Zhenhua wants to do research in the maintenance workshop, which means that he can work with Qin Zhenhua every day in the future. This makes Wang Erzhu very happy. Moreover, Zhao Guodong has also assigned tasks, and Wang Erzhu is
He is the one who helps Qin Zhenhua. At the same time, if Qin Zhenhua needs help from any master, the master cannot refuse.
This is for sure. If it is really done, it will be the glory of the entire maintenance workshop. This time in the skills competition, Qin Zhenhua won the glory for the workshop. Now, the entire workshop is full of enthusiasm.
After Du Youwen left, Qin Zhenhua successfully acted cowardly, and everyone gathered around and started talking about it.
Take it apart and release the hydraulic oil, and then you can see the shiny structure inside.
A turbine and a guide wheel are the key structures. Song Weize also placed the task of imitating these two components on Qin Zhenhua.
"It looks like it was poured," said master Li Changjiang.
This kind of complex blade was originally thought to be cut with a lathe. Who would have thought that it was actually poured directly?
Comparing the two, pouring is of course advantageous, as the cost is greatly reduced! However, pouring to this accuracy is simply unbelievable.
The surface is shiny and has a unique metallic luster. Although it is the result of being flushed with internal hydraulic oil for a long time, if you want no metal impurities to appear during use, it must be absolutely smooth and free of burrs when pouring.
.
"Yes, if you want to mass-produce, you must pour it." Qin Zhenhua said: "If we just copy one, then we have a stupid way."
"What can we do?" Luo Rongchang asked.
"We use a lathe to cut the blades, then cast the rotating shaft, and then weld the blades on," Qin Zhenhua said.
To build one alone, you can use stupid methods. If you make it in large quantities, you will pour it. However, after hearing what Qin Zhenhua said, Li Changjiang disagreed: "If the blades are made and then welded, the precision of the welding will be much higher.
High, right?"
This is different from welding the armor steel plates of tanks. The error is estimated to be on the order of 0.001 centimeters. Welding to this level is not easy. It is better to pour it.
"However, if it's pouring, it's not easy to reach this level. Moreover, if it's poured, you don't need a CNC machine, right?"
How to use a CNC machine tool? This thing can improve the machining accuracy, but in the face of this complex structure, it is probably difficult to operate the knife.
"Of course it is useful. CNC machine tools are used to process pouring molds." Qin Zhenhua has already made up his mind. Since he wants to survey and imitate, he must be able to use it in large quantities. He can only make one or two.
What's the use?
Let me do the research on the process myself. The book I just read is about the casting process. First, accurately build the model of the blade, then use the CNC lathe to process the mold, and finally pour it, and you can get the same imitation.
.
Of course, this is only the first step in a long journey of thousands of miles, and complex tests must be carried out to ensure that it has the same mechanical strength as the original product being tested and copied.
Moreover, the biggest problem with imitation of surveying and mapping is that if you know what is happening but don’t know why, you can only imitate it unchanged. If you want to improve, it will not work.
While I was studying it, a breathless voice came from outside: "Okay, the hydraulic oil is here."
The hydraulic torque converter requires a trolley, and a bucket of hydraulic oil can be used on a bicycle. The 28 bicycles of this era can be used as cars, but only a bucket of hydraulic oil is hung, and the rear frame is offset.
It's not easy to come here.
Qin Zhenhua just glanced at it and rejected it: "What you brought is gear oil! The model is wrong! What I want is HS grade hydraulic oil!"
What?
Du Youwen, who was as tired as a dead dog, was dumbfounded. Are you kidding me?
"Hey, why didn't you tell me in advance?"
"I'm obviously talking about hydraulic oil. Besides, don't the people in your R&D room understand this little problem? Although it is connected to the gearbox, there are no gears in it. What gear oil is used?
It works on oil pressure.”
After finishing speaking, Qin Zhenhua said to Wang Erzhu domineeringly: "Er Zhuzhu, call Lao Song. Does their R&D department understand the difference between gear oil and hydraulic oil?"
All the master chefs had meaningful expressions on their faces.