Start with the aviation industry

Chapter 94 Unexpected Welfare ([-]rd)
Meng Bowen is the deputy director of production. He is most concerned about the production progress of the parts. He first asks when the broaching of formal parts can start.

Knowing that the formal broaching of parts can start tomorrow morning, he nodded, quite satisfied with the progress.

Broaching is different from ordinary machining.

It is much more cumbersome. At the beginning, the formal parts cannot be broached, but the test piece is broached first, and the formal part can only be broached after the test piece is qualified.

The leaders looked at this vertical broaching machine for a while and then went to another machine tool not far away. It was a horizontal ordinary lathe, which was undergoing semi-finishing machining of turboshafts and eight turboshafts.

Lin Feng walked to the broaching bed, looked very interested, looked at the preparations, and then chatted with the two pullers.

Before, Lin Feng was in charge of the broaching process, and he was very familiar with the people in the broaching class, such as Lin Weidong, the monitor of the broaching class.

The surname Lin is not a common surname, and there are not many people with the surname Lin in workshop 406. It just so happens that the leader of the labor class is also surnamed Lin.

"Squad Leader Lin, this time it's a test sample of the same material."

Seeing the drawing sample on the workbench, Lin Feng checked the weight and knew that it was a superalloy material.

Generally, No. 45 steel is used as the drawing sample, and it is generally the same size as the formal part to be processed, so the cost is lower, because the superalloy material is much more expensive.

The density of superalloy is also slightly higher, its density is about 8.5, and the density of No. 45 steel is about 7.8. An experienced person can know whether it is a superalloy or No. 45 steel by weighing it a little.

Lin Weidong said, "The test material is also GH4133 material, which is also a high-temperature alloy, but it is a domestic high-temperature alloy, and the official parts are French-made high-temperature alloys."

After a while, the broaching of the specimen began.

The broaching machine started to work, making a heavy buzzing sound, the knife box moved down slowly, and the broaching knife began to broach the sample.

The metal material on the sample is broached layer by layer, a tongue and groove is half-formed, and then the broach for the second stroke is replaced.

There is no way, the broaching machine is a little behind, with a maximum stroke of only three meters, such a tenon and groove needs to be divided into three times to be broached.

A total of seven broaches, with a total length of more than seven and a half meters, were installed in three knife boxes. After the first stroke was completed, the knife box was removed from the broaching machine, and then loaded into the knife box for the second stroke.

The second trip started again.

The broaching machine still made a heavy buzzing sound, the knife box moved slowly under the huge tension, and each blade on the broach cut the test piece one by one.

suddenly!

With a bang, the broaching bed vibrated. Lin Weidong reacted quickly and immediately pressed the stop button.

He and Lin Feng looked at each other, both of them knew that the knife had just collapsed.

Sure enough, after looking at it, he confirmed, "MMP, you're so unlucky that your sword broke."

The so-called "broken knife" means that during the broaching process, a certain blade of the broach breaks off. This happens occasionally, but it is not very common.

Collapsing the knife is of course not a good thing. The broach of the collapsing blade must be scrapped, and it may cause the scrapping of parts.

Fortunately, the knife broke during the process of broaching the sample, just abolishing one tenon and groove on the sample. Such a sample is enough to broach more than [-] tenon and grooves.

Lin Feng said, "Exit slowly, be careful."

Lin Weidong nodded, and operated carefully, and finally pulled out the broach. The tenon and groove on the test piece was useless, and there was no need to save it. He turned the indexing plate, turned it at an angle, and changed its position to prepare Re-broach a new tongue and groove.

The knife box for the second stroke was also removed from the broaching machine, and Lin Weidong ordered, "Xiao Song, replace the knife box for the first stroke, and start broaching a new tenon and groove."

Xiao Song is Lin Weidong's apprentice, he nodded, changing the knife box is not a problem for him.

What about Lin Feng and Lin Weidong?

The two seriously looked at the broach with the broken blade. They thought that only one tooth was broken, but two teeth were broken. This broach was completely scrapped, and it was not worth repairing at all.

Lin Weidong unloaded the scrapped broach, wrapped it in a rag, and said quietly, "Gong Lin, I'll give you the scrapped broach, put it away carefully."

really?
Lin Feng was secretly happy.

This is good stuff!
Scrapped broaches belong to the welfare of the drawing class, but these things are rare and difficult to deal with. You can't scrap two or three broaches throughout the year. These things are precious and generally not sold out.

What can this thing be used for!

It can be used to make all kinds of knives, such as a kitchen knife for cutting vegetables, a bone chopping knife for chopping bones, and even a boning knife.

The material of the broach is so good!
Its material is different from turning tools, milling cutters, etc. The material of the broach belongs to a special alloy, which is not only hard, but also not as brittle as other alloy materials.

The bone chopping knife made of it is so sharp, no matter how thick the bone is, the bone will be broken in two, and there is no need to worry about the knife chipping. It has been used for decades without any problems.

Lin Weidong's family has two kitchen knives made from discarded broaches. They are amazing to use and extremely sharp. They are still sharp after being sharpened for more than half a year. They never rust and are as bright as new.

It is an open secret that the discarded broaches are quietly taken out of the factory. A few months ago, Director Yan personally took a discarded broaches from the drawing class.

This kind of material is good, but of course it is expensive, too expensive for you to imagine.

For example, the broach that was scrapped just now is about two feet long and weighs three to four kilograms. Its cost is more than 3000 yuan, which is higher than the sum of the annual wage income of an ordinary worker.

The main reason why the broach is so expensive is that the material is too expensive. This kind of alloy needs to be imported, and there is no domestically produced one at present.

Lin Feng was overjoyed, and accepted it unceremoniously.

I didn't expect such an unexpected harvest today.

At the beginning, when Lin Feng was in charge of the broaching process, he once jokingly said that if there is a scrapped broach, he must keep one for him, and also play with a kitchen knife.

Who knows, Lin Weidong has always kept it in his heart, and now he wrapped the discarded broach in a rag and quietly gave it to Lin Feng.

"Squad Leader Lin, then I will accept it without hesitation. After get off work, I will invite you both, master and apprentice, to a restaurant."

Lin Weidong said, "It's easy to talk about going to the restaurant later. Let's wait until we finish drawing the turbine disks of this batch of turboshaft eight."

"Okay, let's have a drink or two after broaching these turbine disks." Lin Feng said enthusiastically.

After expressing his thanks again, Lin Feng returned to the CNC five-axis with the discarded broaches tightly wrapped in a rag.

This broach must not be taken back to the office. Even if it is wrapped in a rag, some people may be able to see it.

Once it is known to others that it is a scrapped broach, some people will definitely ask for a share of the pie. Some technicians have worked in the 406 workshop for one or 20 years without getting a scrapped broach, mainly Seng Duo. Congee, something so good, too many people need it.

　It's the third watch again, everyone, come here with a few recommendation tickets or monthly tickets to support.

　　
　
(End of this chapter)