Start with the aviation industry

Chapter 7 Maggie Can't

Just do it!

We will challenge the difficult ones, and we will write the NC program for the blade milling of the axial flow impeller or the centrifugal impeller.

The design drawings of this part of the turboshaft Bajia engine were not available in the reference room of the 406 workshop, so Lin Feng went to the archives of the Phoenix factory.

There are not only tens of thousands of books of various types, a large part of which are professional books in the field of aviation industry. In addition, the design drawings of various types of engines are backed up and archived here.

Lin Feng successfully found out the design drawings of the axial flow impeller and the centrifugal impeller. After looking around, he decided to start with the axial flow impeller.

why?

The axial flow impeller is relatively simple. Of course, this simplicity is relative. Compared with other parts, its numerical control program is definitely not simple, but it is relatively simple compared to the centrifugal impeller.

The design drawings of the axial flow impeller are spread out on the big table in the reading room. This is a No. 1 drawing, which is not small.

The blueprint is not blue, but white. Gaul has introduced a full set of technology. This design blueprint is also provided by them. Fortunately, it is not in French, but has been translated by Phoenix Factory. Every line of French is neatly written. The writing imitates Song characters.

It is not surprising that the full set of technology of the turbo shaft Bajia 80s has been introduced, and the design drawings have been translated.

After carefully looking at the design drawings for a few minutes, Lin Feng thought in his heart that the axial flow impeller has 16 blades in total, and the shape of the blades is very complicated. It is really not a simple matter to compile its milling program.

It's 1990, not the 21st century, and CNC programming is completely different.

It is much easier for us to do NC programming now. Draw the processing diagram in the drawing software, select the tool, set the processing parameters, and the drawing software can directly generate the NC machining program, such as UG has such a function.

Not now, only manual programming line by line, write processing commands one by one.

Of course, tools must be selected before programming the NC machining program. He has seen the alloy milling cutters to be used for axial flow impellers and centrifugal impellers, and the tool sizes and parameters have been deeply imprinted in his mind.

Perhaps these alloy knives are not the most ideal, but only such alloy knives can be used at present, even if the alloy knives need to be optimized, that will be a matter of the future.

Spread out a piece of white paper on the table, holding a pen, Lin Feng wrote line by line, and sometimes stopped to think about it, after all, it was the first time for CNC programming.

But I quickly became proficient, and there was very little time to stop and think. More than an hour passed, and the double sides of several blank sheets of paper were filled with secrets.

Because the curved surface of the blade is very complicated, the NC machining program written is relatively long.

After checking it again and looking at the drawings, he found two small problems, and made modifications. He checked it again and confirmed that there were no problems. Then Lin Feng looked at the time.

Oops, time flies so fast, it is almost the end of the morning, no wonder the administrators of the archives are clearing the things on the table.

Originally, I wanted to write the program on the computer and save it to the disk. It seems that I don't have time in the morning.

As soon as he got to work in the afternoon, Lin Feng went to the archives again, and he didn't even go to workshop 406.

In 1990, computers were a rare commodity, and it is estimated that few people would use them. The first-level units of the workshop in Fenghuang Factory did not have computers, but there were two computers in the archives.

These two computers are also treasures, a separate room, and a beautifully painted computer desk. The two computers are placed side by side in the room on the third floor of the archives.

Generally speaking, it is rare for someone to use a computer in a month, mainly because the people in the aero-engine design institute use it a lot, mainly to calculate some design parameters.

Lin Feng wanted to use the computer in the archives, but the computer administrator refused, saying that he needed a certificate issued by the workshop leader.

Lin Feng complained directly, using the computer for a while, it is so troublesome, so I don't need it.

I originally planned to input the program written in the morning into the computer, and then store it on the [-]-inch floppy disk I brought. When I want to use this NC program, I can just insert the floppy disk into the CNC machine tool.

If you don’t use it, forget it!

Lin Feng left the archives and returned to Workshop 406. As soon as he walked into the technology room, he was slightly puzzled, thinking in his heart, where did people go?

The huge craft technology room is now empty, and there is no one there, which usually does not happen.

Could it be that everyone went to a meeting, but there was no notice that there was a meeting.

When Lin Feng was wondering, a young craftsman Yang Wenjie walked in from the outside, "Brother Lin, why didn't you go to the production site to see the test piece processing?"

Yang Wenjie has been working for two years, one year later than Lin Feng, and the relationship between the two is usually good.

Processing test pieces?

What test piece to process!
Seeing that Lin Feng was confused, Yang Wenjie said, "Brother Lin, don't you know that our five-axis machining center started processing test pieces this afternoon."

"Really, is it possible to process the test piece?" Lin Feng was even more confused.

After reading the three technical manuals of this machine tool, Lin Feng clearly knew that for those who have never been in touch with CNC machining centers and have little foundation in CNC machining, it is definitely not a task to use such a machine tool to process test pieces. easy thing.

That's why Lin Feng felt strange.

Seeing that Yang Wenjie didn't seem to be lying, although he felt a little strange in his heart, Lin Feng was still going to take a look at the scene.

When he walked into the production site of the workshop, from a distance, Lin Feng saw a large group of people surrounded by the five-axis machining center. Almost all the technicians in the technical room were there. No wonder there was no one in the technical room.

In addition to the technicians, there are also some curious workers. In addition, Yan Bing, the director of workshop 406, Jiang Haitao, the technical director, and Liu Changrong, the director of the technical room.

Oh my God, Wang Tianfang, the deputy factory director, is also here. He is the technical deputy factory director. He is the veritable boss in the technical field of the entire Phoenix Factory, the absolute number one brother.

Next to him was a middle-aged man wearing black-rimmed glasses. Lin Feng didn't recognize him, but his guess must be simple, and he was probably a leader.

The test piece used for processing has been installed on the workbench of the machining center, and it seems that it has been started for a while.

In everyone's eyes, Maggie was sweating profusely, and was operating in fear. The layman was watching the excitement, and the expert was watching the doorway.

Others may not know how good Maggie is, but Lin Feng can tell after just a few glances that Maggie is no good, not to mention processing test pieces, even the basic operations are probably not good enough.

(End of this chapter)