These workers are also skillful, and soon took out the casting parts, which are the two intermediary casings of the "TFWZ001" turboshaft engine, casting titanium alloy materials, casting accuracy requirements are very high, and the structure is relatively complex, but Li Tianfeng fully considers the manufacturability, and the casting difficulty will not be as huge as imagined.

Li Tianfeng was full of anticipation, watching the workers take out the parts, and then clean the surface of the parts, such two parts, were quickly cleaned up, and the two parts were brought over by the workers and placed on the inspection table to wait for inspection.

These two parts are not heavy at all, on the one hand, they are made of titanium alloy, the density of titanium alloy is relatively small, and on the other hand, the casing is designed to be relatively light and not bulky at all. You must know that Li Tianfeng has carried out a lot of weight reduction design, and it is impossible to make the receiver design very bulky.

The two intermediary receivers of Tianfeng Technology and the six receiver parts of the turboshaft C of Factory E are placed side by side, which looks like a clear contrast.

Liu Qingshan said: "Mr. Li, these two pieces of yours are really exquisitely designed, and they look better than our parts." ”

Li Tianfeng also thinks so in his heart, both of them are receivers, and they are both intermediary receivers, but a clear-eyed person can still see at a glance that there is still a difference between superior and inferior.

The first time he saw his two real cases, Li Tianfeng was also very happy in his heart, before that, he saw that they were all three-dimensional graphics, which one is stronger to read novels on his mobile phone? There is still a certain difference between the mobile phone reading network and the real thing, at least, visually speaking, it feels more refreshing to see the real thing, and it is more happy.

Li Tianfeng took two steps forward, leaned in and looked seriously, but soon, Li Tianfeng's face changed slightly. How so?

Li Tianfeng has seen obvious casting defects, shrinkage looseness, there is actually casting shrinkage loose, shouldn't ah, when compiling the casting process regulations, Li Tianfeng paid special attention to the appearance of casting shrinkage. And effective measures have been taken in the casting process, how can this be?

Seeing Li Tianfeng's face change, Liu Qingshan immediately asked with concern: "Mr. Li, what's wrong, is there any problem?" ”

Li Tianfeng pointed to the obvious defective parts on the casing and said: "Mr. Liu, you see, the casing has shrunk during the casting process, and these two casings are scrapped. ”

The so-called "casting shrinkage" is a common casting defect in casting. Everyone knows about thermal expansion and cold contraction. The temperature of the molten metal liquid is extremely high, and it will be slowly cooled after pouring, and the volume will gradually shrink, and there is a sequence of cooling, the same part, some parts will be cooled first, and some parts will be cooled later, and the casting shrinkage will often appear in the post-cooled parts.

Prevent the occurrence of "casting shrinkage". The most effective way is to take measures to achieve that all parts of the same part are cooled at the same speed at the same time.

Liu Qingshan is the deputy chief engineer. Of course, I know the casting shrinkage, and when I saw that these two parts had obvious casting shrinkage, my face also changed, and it was even a little ugly, because these two pieces were scrapped by the foundry workshop of my own E factory, which was equivalent to losing face once.

"What's going on?" Liu Qingshan asked in a deep voice.

Director Hu next to him didn't think about it. There was such an obvious shrinkage, I couldn't help but turn around, my eyes widened, and I asked sternly, "What's going on?" ”

"This, this. This ......" squad leader Liu couldn't say anything for a long time.

Seeing squad leader Liu's demeanor, Li Tianfeng immediately knew what was going on, and immediately asked, "You must not have cast according to the casting process regulations we provided, right?" ”

Squad leader Liu lowered his head, his old face flushed, and he whispered: "I think the casting process of these two parts is better, and I did not follow your process regulations, but relied on my own experience to cast parts, but I didn't expect such a casting defect to appear." ”

"Playing the piano !!"

Liu Qingshan was furious, there was such a thing, this is an aviation part, and there was such a thing.

slapped him hard, and Liu Qingshan lost his temper: "Director Hu, how did you do it, you are still good at doing advocacy things, and you actually operate with experience, which is too unusual." ”

Liu Qingshan went to Tianfeng Technology several times, and every time he saw that the technical workers of Tianfeng Technology operated in strict accordance with the process regulations, and the processed parts were also of first-class quality, Liu Qingshan moved his mind.

In recent months, Liu Qingshan has been vigorously promoting this matter, strengthening process discipline inspections, and urging workers to operate in strict accordance with process regulations, but it seems to have little effect.

Although the E factory is an old military factory, the technical strength is strong, but the process regulations have been relatively rough, many process regulations, only a pair of process drawings, and then next to the four words "processing according to the drawing". There are no operation steps and process parameters, and how to process according to the drawings is simply nonsense.

Frozen three feet, not a day of cold, E factory to reach Tianfeng Technology such a process, may take many years, have to spend a lot of effort, Liu Qingshan seems to be aware of this problem, is paying close attention to the process refinement work, requiring every process, like Tianfeng Technology, must have a scientific and reasonable, and detailed process steps, as well as scientific process parameters.

After so many years of hard work, there are still people who do not operate in accordance with the process regulations, Liu Qingshan was furious and lost his temper.

Li Tianfeng was also a little disappointed, but he didn't expect that the other party did not operate in accordance with the casting process regulations provided by himself, but relied on his own experience to assert himself, and in the end, there were fatal defects in the parts, so the two parts could only be scrapped.

After losing his temper, Liu Qingshan said very apologetically: "Mr. Li, we will immediately organize recasting and strive to hand over the qualified parts to you within two or three days." ”

Liu Qingshan said this, what else could Li Tianfeng say, nodded, "Mr. Liu, then that's it, let's wait for another two or three days, you know, we are waiting for these two intermediary boxes to be used in a hurry." ”

"There will definitely be no more problems this time." Liu Qingshan assured, and then turned back to Director Hu of the foundry workshop and said: "Xiao Hu, this matter must be dealt with strictly, and in addition, immediately organize forces to cast these two intermediary casings of Tianfeng Technology with quality and quantity." ”

At the beginning, Liu Qingshan still called himself "Director Hu", but now he is directly called "Xiao Hu", Director Hu sighed in his heart, and thought in his heart, if this matter is not handled well, if he does not deliver qualified parts immediately, he may be affected.

So, Director Hu said: "Mr. Liu, don't worry, I am personally responsible for the casting of these two parts." ”

Liu Qingshan nodded, then turned back to Li Tianfeng and said, "Mr. Li, let's go, go to my office for a cup of tea, and we'll take a look tomorrow." ”

Together, the two went out of the foundry......

………

Speaking of the foundry workshop, there was such a big mistake, and Hu Zhi, the technical director of the workshop, was a little angry, and personally organized several workers to reopen the furnace, remodel, and recast the intermediary casing.

Because it is precision casting, there is a lot of work before pouring, however, the casting process provided by Tianfeng Technology Company is very detailed, what to do in the first step, how to do it, and what to do in the second step.

Looking carefully and carefully at the casting process regulations of Tianfeng Technology, Hu Zhi couldn't help but nod in admiration, a casting process specification can do this, which is very remarkable.

Next to the foundry worker Xiao Zhang, college culture, engaged in foundry work for three or five years, although young, but also good experience, and early carefully read the casting process regulations, the process has long admired the process regulations.

If it weren't for squad leader Liu, Xiao Zhang would definitely operate according to this process, seeing that the technical director of his workshop nodded while looking at this process specification, Xiao Zhang said: "Director Hu, this casting process specification is very well prepared, I think according to the above operation, it will definitely be able to cast qualified parts smoothly." ”

Hu Zhi nodded, "Strictly operate according to this casting process regulations, who dares to disobey, don't blame me for turning my face." After speaking, he said to Xiao Zhang: "Xiao Zhang, you are temporarily acting as the squad leader and responsible for the casting of these two parts." ”

Xiao Zhang was excited for a while, and immediately commanded several workers to start operating in accordance with this casting process specification step by step.

According to the operation of this casting process in a few steps, not only Xiao Zhang, but also the rest of the workers are also emotional.

"I didn't think about it, it's so simple to operate according to the process, so smooth."

"Yes, with such a casting process specification, it is possible for even a novice to successfully cast a qualified part."

"Tianfeng Technology, it's not simple!"

"It's a pity that Tianfeng Technology doesn't recruit people from E Factory, otherwise, I really want to jump to Tianfeng Technology Company."

Several workers, including Xiao Zhang, everyone while working, while a burst of emotion, a burst of admiration for Tianfeng technology, after a preliminary work, everything is ready, everyone began to pour parts, watching the molten metal poured into the model, everyone was inexplicably excited in their hearts, thinking in their hearts, this time they will definitely be able to cast qualified parts.

Coincidentally, Director Hu, who was worried about the casting of parts, came over again, and saw that everyone had completed the pouring, just waiting for the parts to cool down slowly, Director Hu asked, "How is the situation?" ”

Xiao Zhang saw that Hu Zhi was a little worried in his tone, and couldn't help but say: "Director Hu, there shouldn't be any quality problems, if nothing else, these two parts will all be qualified." ”

………

Today's two watches, the second one will be sent.

Tomorrow morning will leave for Guangzhou to participate in training, arrive at Guangdong Writers Association at five o'clock in the afternoon, tomorrow to code words is also night, tomorrow's update can not be guaranteed, however, a more at least will be guaranteed. (To be continued......) R1292