Turbofan 21 engine, normal temperature or low temperature parts, such as fans, compressors, some accessory parts, etc., a large part of the "Hercules" material.

Tianfeng Technology's "Hercules" materials have several grades, the material grades are "DLS001", "DLS002", "DLS003" and so on, each grade of materials, performance and use have certain differences.

Precision casting workshop 1 and 2, responsible for the precision casting of almost all kinds of parts, in the past, the casting materials are basically metal materials, and now, it is necessary to start the precision casting of non-metallic materials such as "Hercules".

Before casting, we have made full preparations, after a series of tests and verification casting, now start casting formal parts, and in order to be safe and prudent, the parts that start precision casting are general parts, and the size of the parts is not large, and the structure is not complicated parts.

The precision casting of this part uses a metal mold, and the mold material is a high-temperature alloy.

Two workers responsible for precision casting, the mold is installed in the precision casting equipment, the equipment is very large, fully sealed large equipment, look at the appearance of this equipment, it should be Tianfeng Technology Company and a domestic machine tool equipment factory jointly developed and developed non-standard equipment.

This equipment is developed and manufactured for the precision casting of "Hercules" material parts, the equipment is very large, and it looks very advanced.

After the mold is installed, the inspection is correct, the door of the equipment is closed, the equipment is gradually in a vacuum state, and the air pressure in the equipment can be seen through the LCD display of the equipment, which is basically close to zero.

Operator through the glass door. I looked at the situation inside the device, and then looked at the parameters on the LCD display, including pressure, temperature, humidity and other parameters, and confirmed that it was correct. Press the start button to start pouring.

The essence of the "Hercules" material is a mixture of a special resin and carbon fiber material, which is formed into a melted "Hercules" material, which is fed into the mold from the gating opening of the mold under a certain pressure.

On the LCD screen of the equipment, you can see that a certain data is beating rapidly, which represents the amount of "Hercules" material being poured, and when the data stops beating, it means that the pouring is completed. The inside of the mold is filled with "Hercules" material.

After holding pressure and holding heat for 30 seconds, the temperature gradually drops, and after dropping to a certain temperature, the safety door of the equipment opens, and the operator wears gloves to open the mold, and sees the parts that have been cooled and formed, through the parts that have just been precision casting.

The parts were easily taken out. It does not bond with metal molds, which is one of the advantages of "Hercules" material. It has good casting performance.

When the parts were taken out, the process technicians who had been watching the entire casting process immediately surrounded them and began to inspect the parts, first visually.

Undoubtedly, the parts are very beautiful. Very exquisite, the casting of metal molds is very different from what sand mold casting, the precision is higher, and the surface quality of the parts is better.

"Good parts. You see, the surface of the parts is very flat and smooth, there are no defects, and it is very beautiful and exquisite! ”

"Yes, the parts look great."

After checking the appearance, we began to measure the size, after the measurement, everyone was amazed, a little unbelievable, the precision casting of "Hercules" material, its casting accuracy is higher than that of general precision casting.

"You see, the dimensional accuracy of this cast part is basically about 0.1."

"Yes, the casting accuracy is very high, and the size of the parts with a tolerance of more than 0.1 basically does not need to be machined, and it can be cast directly."

"It can be cast directly, which will save a lot of trouble, such as this part, after the completion of casting, as long as the mechanical processing of the installation of the inner hole, as well as the processing of a few positioning holes with slightly higher precision, the manufacturing cycle of the part, the manufacturing cost, greatly reduced."

Several craftsmen, everyone worked together and cooperated together to check the part, and the appearance and size of the part were all qualified.

"It seems that the casting quality of the parts is good, and next, we only need to check the internal defects of the parts, as long as there are no porosity, shrinkage porosity, cracks and other defects inside the parts, this part is a very good qualified product."

"Yes, we'll do an internal defect check of the part right away."

Soon, the part was sent to the inspection center for internal defects, and even, in order to check more accurately, the part was cut, and after a strict inspection, there were no internal defects in the part, that is, the part was a good product.

In the first and second workshops of precision casting, the precision manufacturing of "Hercules" material parts, from the initial stage of testing and verification, to the beginning of the present, adhering to the principle of from simple to complex, from easy to difficult, began a series of precision casting.

After some parts are precision casting, we have accumulated a certain amount of experience, and gradually mastered the process parameters and process methods, we will definitely start a series of complex parts of precision casting, such as very complex fan casing.

………

Clear stone manufacturing base.

The second phase of the project was fully completed more than a month ago, and put into use, at that time, the Qingshi base also held a warm and grand groundbreaking ceremony, and now, the entire second phase of the project, more than a dozen major production and manufacturing plants, all gradually on the right track, began a series of production.

In this way, Qingshi production and manufacturing base, production and manufacturing plants reached more than 20, in addition, there are turbine shaft aero engine maintenance center, specialized "Hercules" material manufacturing workshop.

At present, there are more than 20 specialized turboshaft engine parts production and manufacturing workshops in Qingshi production and manufacturing base, plus aircraft maintenance center and "Hercules" material production and manufacturing workshop, with a full 30 workshops and nearly 20,000 employees of all kinds, almost catching up with the number of employees in the headquarters of Tianfeng Technology Company.

Aero engine maintenance center, two parallel workshops, one of which is for the engine receiving, dismantling, cleaning, inspection and assembly workshop, and the other is for the repair of various parts.

Turboshaft D engine, the first turning period of life of 3000 hours, service life of 6 years, that is to say, the cumulative service life of the engine reaches 3000 hours, or the factory life reaches 6 years, can no longer be used, but must be returned to Tianfeng Technology Company for overhaul.

The turboshaft D engines that were delivered to the factory in some batches began to return to the factory one after another, and returned to Tianfeng Technology Company for overhaul.

Obviously, this is a military truck, the truck stopped in the huge No. 1 plant, and a soldier in camouflage uniform jumped out of the truck.

A military representative who had been waiting on the sidelines for a long time, and a deputy director of the aircraft maintenance center, everyone began to jointly receive the engine.

On the truck, two turboshaft D engines, these two engines were slowly lifted down from the truck by workers and placed in the engine receiving and storage area not far away.

Everyone gathered around the two engines, checked them roughly, and then completed the handover, signed, and received the engines with the soldier who sent the engines and the military representatives.

Soon after the engine was received, one of the engines was transported to the engine disassembly area, where there were engines on several benches and some of them were being disassembled.

After the engine is disassembled, the parts will be cleaned, and not far away, there is the cleaning area of the parts, where a lot of parts are neatly placed.

Li Tianfeng, accompanied by Zhang Can, He Baitao, and Hu Donghai, was looking at the parts that were decomposed and pulled, to be cleaned, or had been cleaned.

Li Tianfeng picked up the parts one by one and looked at them very carefully, these parts are all parts after 3,000 hours of use.

After 3,000 hours, there must be some difference between these parts and new parts, some parts, and even some degree of wear.

What Li Tianfeng wants to look at is the condition of these parts, such as wear and tear, deformation, etc., to see if these parts are within the qualified range.

The turboshaft D engine was almost designed by Li Tianfeng, which is also the first engine designed by Li Tianfeng himself.

After looking at the cleaning area for a long time, Li Tianfeng said: "Let's go, let's go to the inspection area to have a look." ”

After the parts are cleaned, a detailed and detailed inspection is carried out in the inspection area, and after the inspection, the technicians analyze the parts in combination with these inspections and give a reasonable maintenance plan.

There is an engine part being inspected here, and it seems that the inspection of each part has basically been completed, and an inspector is sorting out the inspection records.

Li Tianfeng said: "Show me these inspection records." ”

Inspection records, a thick book, Li Tianfeng looked through the inspection records of key and key parts, and Li Tianfeng flipped through a substandard part.

There was an abnormality in the casing of the combustion chamber, and the dimensions of the casing were acceptable, but a tiny crack appeared on the installation side.

Is there a crack? Li Tianfeng hurriedly put down these inspection records, and then walked around the combustion chamber casing placed on the inspection platform, and looked seriously, Zhang Can and the others followed.

As you can see, on the installation side of the combustion chamber casing, a small crack with a length of about two or three millimeters has appeared, and the crack is clearly visible.

Cracks are not a good sign.

Seeing this crack, Li Tianfeng's expression was solemn.

…………

Today's two watches, the first one is sent! (To be continued......)