Seeing that the boss personally gave the order, Zhu Yifeng hurriedly instructed the master worker who operated the precision five-axis, and the master worker picked up a formal part and began to carefully clamp it onto the workbench, ready to start processing.

This is a formal part, in the 336 factory from the blank to complete rough machining and semi-finishing, here will be carried out the precision machining of the blade profile, such a formal part processing cycle is longer, from the CNC program can be seen, processing such a part takes more than an hour.

It took about ten minutes for the master worker to install this blade, and then carefully set the tool, and after confirming that it was correct, he pressed the start button, and the processing began again.

The alloy milling cutter on the cutter head rotates rapidly, making a slight humming sound, and the precision five-axis spindle moves quickly, and the alloy milling cutter touches the blade surface and begins to mill.

Milky white coolant sprays out to cool the blade surface, and everything is clearly visible through the glass of the precision five-axis safety door. Yi Chunhua is the chief engineer of Factory 336, he is an expert in the field of processing technology, and he knows that the current level of processing has reached the world's first-class.

A fan blade like this is more than 400 mm long, and the blade shape is so complex, if they are processing, the precision milling of the blade alone will take several hours for each piece, and it will only take more than an hour to process it according to the process technical data.

Jiuzhou Heavy Industry is processed in strict accordance with the requirements of process data.

Yi Chunhua and the others also used to process in strict accordance with the parameters on the process and technical data, such as the rotation speed of the tool reached 6000 revolutions per minute, but he knew that their five-axis machining center could not stand it, so they adjusted the rotation speed of the tool to 3000 revolutions.

The rotation speed of the tool is doubled, and the processing efficiency must be greatly reduced, such a blade, it takes several hours for the 336 factory to process, and here it only takes more than an hour.

The alloy milling cutter rapidly mills the blade profile, a large number of fine metal chips are milled off, and the blade surface is very smooth and beautiful. Everyone watched it with relish, and even reveled in it.

This kind of processing is really pleasing to the eye, more than an hour seems to pass quickly, until the machine stop processing, began to retract, everyone came back to their senses.

Yi Chunhua said with emotion, this efficiency is too high, and such a complex blade has been processed.

Tang Fei was also very satisfied with this processing efficiency, and waved his hand: "Take the blade down, let's take a look first." ”

The worker removed the blade from the workbench and handed it to Tang Fei, Tang Fei took this piece of titanium alloy blade, looked at it with relish, and his face showed a satisfied look, although the size has not been measured, but from its appearance, the processing quality of this blade is very good.

Only when the processing quality is very good, the surface of the parts will be so smooth and beautiful and exquisite, if there are burrs on the processing surface, or the processing surface is rough, it is often a problem with the processing.

Now at least the appearance of the blade is very good, Tang Fei handed it to Yi Chunhua after reading it: "Chief Engineer Yi, you also take a look, you are an expert in this area." ”

Yi Chunhua took this leaf, looked at it seriously, looked at it, and showed excitement on his face, "Mr. Tang, Mr. Zhu, although I haven't done the size measurement yet, my experience tells me that this is an excellent product." ”

Tang Fei waved his hand and said, "Let's take a dimensional measurement now, and let's take a look at its processing quality." ”

Whether it is a good product or not, not only Tang Fei, everyone is looking forward to it.

A good product is a product with a higher quality level than a qualified product. Qualified products only meet the process and design requirements, just qualified, and excellent products are under the premise of meeting the requirements, many sizes reach the middle difference, which is better than the quality requirements.

First to measure the main size of the blade, Zhu Yifeng specially arranged an experienced quality inspector, after these dimensions were measured, the quality inspector reported: "Leaders, these sizes are processed very perfectly, basically they are all medium difference. ”

The so-called middle difference is in the middle range of the dimensional tolerance, there is no deviation, no bias, and no deviation is not beyond the tolerance range.

Tang Fei said loudly: "Okay, okay, now arrange the scanning of the blade profile." ”

The profile of the fan blades is very complex, and the design needs to fully meet the requirements of aerodynamics, such a complex blade shape cannot be measured by conventional methods, and must be accurately scanned on a coordinate measuring machine.

This blade was quickly sent to a coordinate measuring machine not far away, and everyone followed, and in everyone's eyes, this coordinate measuring instrument began to work, and began to intensively step on the surface of the blade, that is, to scan the blade shape.

About half an hour later, the leaf scanning was over, and the printer printed out the scanning results, Tang Fei took the scanning results and looked at them first, and then said with satisfaction: "You all take a look, it fully meets the design requirements." ”

Yi Chunhua happily took the scan results from Tang Fei's hand, and after looking at it carefully, he was very satisfied and said, "The leaf processing is perfect, this is a genuine and excellent product." ”

In addition to being happy, he gave a thumbs up and praised: "Mr. Tang, Mr. Zhu, your processing ability is really strong, such a high-precision fan blade, and the blade shape is so complex, you actually hit it out, and the first blade is an excellent product." ”

Tang Fei laughed.

The fan blades can be machined so perfectly, mainly due to three factors. The first is to have high-precision, advanced CNC five-axis linkage machining center, and the second is to have reasonable processing process steps and parameters, including CNC programs. The third is that the QUALITY +2 buff has taken effect.

Such as a complete set of process technical data, these things are provided by the system, they are very detailed, parameters and steps are very clear, even the processing CNC program is not programmed by the process personnel of Jiuzhou Heavy Industry, but provided by the system.

The system is produced and must be a high-quality product!

In full accordance with the requirements of the system for tool selection, the use of the system specified in the process parameters and steps of processing, and from the system to exchange for the precision five-axis linkage CNC machining center, processing out of the excellent products, there is nothing strange. Tang Fei was completely relieved in his heart, knowing that after this batch of fan blades was processed, they were basically excellent products.

CNC machining has a characteristic, if the first piece is unqualified, the parts processed behind it are all unqualified, if the first piece is qualified, the parts behind it will basically be qualified, because the processing is controlled by the CNC program, and the human factor is relatively small.

The first fan blade is a good product, the second, and the third......

The quality of the fan blades processed in the subsequent processing is good, at least more than half of them are excellent products, and none of the unqualified products have appeared.

For the next few days, this precision five-axis machine has been finishing these fan blades, and Yi Chunhua and his technicians have basically stayed in Jiuzhou Heavy Industry until all the blades have completed the finishing process.

After these blades are finished here, Yi Chunhua and his family can take the blades back and complete the subsequent finishing steps in the 336 factory, and then the formal fan blades will be formed, completely become finished products, and can be installed with fan trays to become fan rotors in the future.

On the afternoon when the fan blades began to be finished, Tang Fei had been in Jiuzhou Heavy Industry until the evening, and when he left, he instructed Zhu Yifeng to entertain Yi Chunhua and others.

After a few days, all these blades were processed, and after packing, they were ready to be transported back to Factory 336 by air, and Yi Chunhua and others were also ready to go back.

Before going back, in addition to thanking Zhu Yifeng and other middle and senior executives of Jiuzhou Heavy Industry, he also went to Jiuzhou Industrial Group to express his gratitude to Tang Fei before getting on the plane.

It can be seen that Yi Chunhua is very happy, and the finishing of the fan blades this time gave him a big surprise, which completely exceeded his expectations.

He originally thought that there were so many fan blades, dozens of pieces. In Jiuzhou Heavy Industry for finishing, some of them can be processed, and he is ready to scrap some fan blades.

As long as some of them can be processed, he selects these qualified fan blades and continues to carry out subsequent processing until the finished product, which is enough for the first engine to need this level of fan blades.

This is the first stage of fan blades, each engine needs a total of 23, now all of them are qualified, and about half of them are excellent products, not only the first stage blades required by the first engine are enough, the second engine has a surplus.

No wonder he was so happy, after thanking Tang Fei in person, he took his people and this box of fan blades and happily returned to Factory 336.

。。。。。

U.S. military.

They have been paying close attention to the research and development of large UAVs by the Chinese military, and are also making every effort to explore the specific situation of this UAV through various channels and means, including the main performance parameters of this UAV.

It's just that the Chinese military is not a vegetarian, and the UAV research and development trial production work is all in China, so it is very difficult for the Americans to infiltrate, and until now the information they have is relatively limited.

But there is one thing that the Americans are very capable of, and that is their reconnaissance satellites.

In a high-ranking office of the US military, a US general is looking at a satellite picture with a serious expression, which is a satellite image of the UAV manufacturing plant in Dongguan City, which the Americans took from a high altitude through a reconnaissance satellite, which is very clear.

In the office, there were several other U.S. military personnel, including a colonel and a brigadier general, who were also very serious.

Through satellites, they took a clear picture of the drone manufacturing plant in Dongguan City.

……

Today's three watches, the second one is sent!