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Chapter 96 An accident in the blade workshop

Lin Feng and Lin Weidong walked in front, and apprentice Xiao Song followed behind with the test piece of the turbine disk. The three walked into the inspection room, where there was a complete set of projection inspection equipment, and there were also projection enlarged pictures of various tongues and grooves.

"Master Lin, the sample has been processed, your speed is really fast."

Lin Weidong said, "A tenon and groove has been processed, please help us have a look at the projection."

The inspector took the test piece, fixed it on the projection tooling, adjusted it, felt that there was no big problem, and then turned on the light.

A beam of white light shines on the tongue and groove, leaving a 50-fold projection on the projection screen.

The standard 50 times tongue-and-groove projection map was also taken over, and the situation was clearly seen by comparing the two.

Lin Feng has been carefully watching the projection of the tenon and groove, and after looking at it, he said with a serious face, "There is no problem with the tenon and groove, it is completely qualified."

Although there is a certain difference between the projection of the tongue and groove and the standard 50 times projection of the tongue and groove, it is within the qualified range, which means that the tongue and groove on the test piece is qualified.

The tenon and groove passed the test, and Lin Weidong was obviously relieved, "I'm lucky, and I can process formal parts next."

The broaching of the first piece has also started to be prepared, because the tools and fixtures are all prepared when broaching the test piece, and the preparation workload is not large.

Lin Weidong operated it himself, first wiped the official turbine disk to be processed with a clean rag, and touched it with his hands, as if stroking a treasure.

Experienced workers can often find some problems with the parts by touching them, such as whether there are burrs, whether there is something that has not been wiped clean, and so on.

There was no problem with the parts to be processed. Lin Weidong wiped the fixture again, and also touched the supporting surface and positioning surface of the fixture with his hands.

Everything worked without any issues.

The processing of the first part starts.

At Lin Weidong's request, Lin Feng was on the sidelines during the processing of the first piece, watching Lin Weidong start the broaching machine and start the broaching of the first stroke.

The vertical broaching machine made a heavy humming sound, the knife box moved down slowly, and the broach began to broach the part.

The first tenon and groove is half-formed, and then, the knife box goes up to the highest point, Lin Weidong dials the index plate, and the first broaching of the second tenon and groove begins.

First mortise, second mortise, third mortise.
A total of 32 tongues and grooves have been broached in the first stroke. Lin Weidong and his apprentice Xiao Song unloaded the knife box containing the broach for the first stroke, and put the knife box with the broach for the second stroke into the Pull the top of the bed.

After the broaching of 32 tongues and grooves is completed, the knife box is removed, and then the knife box with the third-stroke broach is installed.

Lin Feng was thinking, if the stroke of the broaching machine is long enough to complete the broaching process in one go, how cool it would be!
Not only is the efficiency high, but the accuracy of one-time molding is also guaranteed. Such repeated replacement of the knife box will affect the processing quality to some extent, and the processing efficiency is also very low.

After more than two hours, the broaching of the first turbine disk was finally completed, and the parts had been removed from the broaching machine. Xiao Song took a whetstone to remove the burr from one of the tongues and grooves.

This tongue and groove is used for inspection.

The first part must be self-inspected by the operator, and there is also a special inspection by the inspector. The requirements are very strict. If the inspection of the first part is not completed, the processing of the second part must not be started.

Lin Weidong checked it himself, and said with satisfaction, "There is no problem with the appearance, and the size of the rolling rod is also qualified. As long as there is no problem with the projection inspection, this part is completely qualified."

Lin Feng also inspected it himself, carefully looked at the appearance of the tenon and groove, measured the size of the rolling rod of the tenon and groove, and then sent the first piece to the inspection room for projection inspection.

Everything works fine!

It is fully qualified, and the projection is also completely within the qualified range.

This broaching machine also started processing the second part. Lin Feng raised his hand to check the time. The whole morning almost passed by, and it was already past eleven o'clock in the morning.

The first piece passed, so there was no need for Lin Feng to stay here any longer. He looked around the entire processing site and prepared to go back to the technology room.

Lin Feng was a little surprised. He didn't see Mr. Wang, nor Mr. Meng, the whole morning, nor even Jiang Haitao.

Generally speaking, turboshaft [-] starts processing a series of important and key parts. These leaders always go to the manufacturing site to take a look. No one showed up this morning to do it.

Although he felt slightly surprised, Lin Feng didn't think too much about it. He went back to the process technology room and saw a copy of the newly edited process rules of Turboshaft Eight placed on his desk. He flipped through it and proofread it.

After reading only two pages, I heard the voices of my colleagues discussing in my ears.

"Do you know, I heard that the first-stage turbine blade of turbo shaft eight had a big problem in the blade workshop."

"Oh no."

"The turbine blade is a key part, and it is also made of French materials. The blanks are provided by Meca, which is not cheap."

"Isn't it? I heard that a batch of them will be scrapped. Chief engineer Wang and deputy factory director Meng have all gone to the blade workshop, and even director Jiang has gone."

Hearing the discussions of his colleagues, Lin Feng suddenly realized that this is the case. I said, why didn't I see a leader in the morning, and they all went to the blade workshop.

What's wrong with the leaves?

To be honest, Lin Feng was also a little curious, but he quickly gave up. He said in his heart, what are you going to worry about, just do your own thing well, and the blade workshop will take care of it.

Blade workshop.

The atmosphere in the conference room was very dull, and several leaders of the blade workshop even lowered their heads, as if they had done something wrong.

Wang Tianfang, deputy technical director, Meng Bowen, deputy production director, Zheng Xuewen, deputy director of the technical department, the chief of the first technical department, the chief of the tooling design department, the tool designer in charge, etc.

There are two or no. 30 people in the entire meeting room.

On the conference table, there are several first-stage turbine blades of the turboshaft [-]. It seems that the processing has been basically completed, and even the tenons have been processed.

The mortise of the turbine blade corresponds to the mortise of the turbine disk, and the two are in a corresponding assembly relationship. When the engine is assembled, the mortise of the blade is installed in the mortise and locked by the locking plate.

The tenons of the blades are also formed by broaching, but there is a big problem in the broaching process and it is a batch problem. Most of these problematic blades will be scrapped.

This is a French blade, no wonder Wang Tianfang and others couldn't sit still, and the leaders of the blade workshop even lowered their heads.

The quality problem is already very clear. There are 163 turbine blades in this batch, 35 of which have been processed, and quality problems have been found in 35 of the 12 blades whose tenons have been broached.

What quality problem?

The appearance problem, the tenon of these 12 blades shows that there is a groove, which is thinner than a hair.

(End of this chapter)