Start with the aviation industry

Chapter 21 Unbelievable, it's all about the difference

Technical Director Jiang Haitao is here!

Production Director Wu Weiqing is here!
Liu Changrong, technical director of the craft room, is here!

It must be Wu Weiqing who holds the greatest hope for CNC machining. As soon as he got to this machine tool, he asked loudly, "Xiao Lin, how is it?"

Lin Feng replied, "Our preparatory work has been done, and the CNC machining program has also been input into the machine tool. We can start processing the first piece as soon as the sharpened boring tool and simple fixture arrive."

"The boring knives have been sharpened. There are three in total. Take a look." Wu Weiqing was holding something in his hand, which was the three boring knives wrapped in old newspapers.

Lin Feng took it over, looked carefully, and felt that there was nothing wrong with it, so he started to assemble the knives.

There are only three tools in this process, two drills, and one boring tool. The processing content is mainly drilling and boring. Such processing is not difficult for an imported CNC five-axis.

"Come here, all of you, and watch me clamp the knife." Lin Feng beckoned.

Hu Xiaoxiao, Ma Xiaoli, Wang Qiang, and Song Liu gathered around. Lin Feng explained the operation while clamping the tool.

The clamping of the tool is not a big problem for Wang Qiang and Song Liu. They have many years of processing experience, and they mainly consider Hu Xiaoxiao and Ma Xiaoli.

Sure enough, Lin Feng explained while setting up the clip, and the two benefited a lot. They even took out a notebook and recorded Lin Feng's operations one by one in the notebook.

During the whole process, Jiang Haitao, Wu Weiqing and others watched it. Someone thought, Lin Feng knew this machine tool so well, he was even familiar with the assembly of cutting tools, and someone thought, Xiaolin is good.

After all the knives were installed, Lin Feng reminded, "Director Wu, the only thing missing is the set of simple fixtures."

Wu Weiqing said a little displeased, "Playing the piano randomly, it's already past three o'clock, why haven't the things been delivered yet?"

He is very dissatisfied.

In the morning, I specifically explained that this is an urgent item, and even arranged for people from the tool room to watch over the tooling manufacturing site. Who would have thought that the time came, but the item did not arrive.

Just as I was about to get angry, fortunately, the people in the tool room hurried over with the set of simple jigs that had been prepared, sweating profusely.

"Director Wu, we didn't take a break at noon, and finally finished something, please take a look."

There was no rest at noon, and the things had already arrived, so Wu Weiqing didn't get angry anymore, but said, "Xiao Lin, take a look, are the things okay?"

Lin Feng looked at it and felt that the problem was not serious, so he began to install this simple fixture on the machine tool, and there was no problem with the matching of the interface.

Then, Lin Feng randomly took a main box, looked at its serial number, and said loudly, "Number 90-2-12, find out the corresponding process card."

These are aviation parts, and the quality control is very strict. Each part has a number, which is equivalent to their identity number, and there is also a corresponding process card. Who processed each process, when was it processed, and which one The processing on the equipment is clearly recorded.

After the parts were installed and confirmed to be correct, Lin Feng began to operate it himself, explaining while operating.

First of all, of course, is the tool setting. Two drills and one boring tool are all set up one by one, and then the tool compensation is input. After there is no problem, Lin Feng starts the machining program.

The machine tool started to work, quickly processing the main casing, and the processing inside could be seen through the glass safety door.

Wu Weiqing raised his hand to look at the time, and thought to himself, there are 15 main casings in total, each of which will be processed for about three hours, and it is hoped that all of them can be processed within two days.

He knew that the time was very tight and it had to be done 24 hours a day, and he even told him, "Xiao Lin, the request for these parts is very urgent. You have worked hard, and you must be prepared for the whole night."

overnight?
No need!
Lin Feng counted the parts that need to be processed, there are only 15 pieces in total, it shouldn't take all night.

"Director Wu, besides these 15 pieces, is there another batch?"

"No, there are 15 pieces in total, all of them are here."

Lin Feng had already figured it out in his mind, there were only 15 pieces in total, it shouldn't take too long, it's a little past three o'clock in the afternoon, and it's estimated that all of them can be finished after a delay.

Sure enough, in about 10 minutes or so, the machine tool stopped, and Wu Weiqing said a little worriedly, "What's the matter, is there something wrong?"

In his impression, this process takes about three hours to process each piece on an ordinary drilling machine, which is only 10 minutes.

Lin Feng looked relaxed, "No problem, the processing process is very smooth, and our first piece has been processed."

What, it's finished!

Wu Weiqing was stunned for a while, and didn't come back to his senses for a long time.

Lin Feng didn't care about Director Wu's astonishment, but took the machined main box off the machine table and put it on the work table next to the machine tool.

It's really finished!
32 mounting holes with a diameter of 8 and 3 positioning holes with a diameter of 6 have all been processed, and each hole is very bright without any burrs.

Jiang Haitao is an expert in technology and is definitely an expert. When he saw the processing quality, he was impressed. Xiaolin was thoughtful when programming, and specially wrote a program for deburring, so that the opening of each hole is so beautiful.

Regardless of Wu Weiqing's astonishment, Lin Feng said to Wang Qiang, "Check yourself, measure the size of each hole."

Wang Qiang has worked as a driller for so many years. Measuring the size of each hole is a piece of cake. Apart from anything else, he took the special measuring tools that he had prepared long ago and measured them one by one.

"The depth and diameter of each hole are qualified, without any tolerance!"

Lin Feng nodded slightly, such a high-precision CNC machine tool must be qualified, and it would be strange if it failed.

After Wang Qiang finished his self-inspection, the quality inspector next to him began to check. He took the measurement very seriously. He not only measured the depth and diameter of each hole with professional ranging, but also measured the position, including the angle of the three positioning holes. Wait.

"Oh my God!"

"It's all average. This is the first time I have encountered such a good processing quality parts!"

Is it all in the middle?
Everyone got a little excited.The so-called middle difference means that the actual size is in the middle of the tolerance. For example, if the aperture tolerance is 0 to plus 5 wires, the aperture of each hole is basically plus two and a half wires.

After Wu Weiqing recovered from his astonishment, he became interested and took a measurement with a special measuring tool himself.

"It's really almost all medium and poor, it's unbelievable!"

In addition to the first-class processing quality, the processing efficiency is also very high. There are several steps in the processing of each hole with an ordinary drilling machine, first drilling, then reaming, boring, changing tools from time to time, and measuring from time to time. It's very slow, each piece takes about three hours, but here it only takes two to ten minutes.

As expected of CNC machining, the degree of automation is high!

Jiang Haitao thought in his heart, although this CNC equipment cost two to three million yuan, now it seems that it is totally worth the money!

(End of this chapter)