Chapter 179 Domestic Sibei is saved!

With the help of the system, the entire numerical simulation process went more smoothly than Chang Haonan expected.

The design of the discrete element simulation software took about a week, but sharpening the tool did not waste time cutting wood. The software created under the system buff was very efficient. It was quickly based on the actual conditions of several typical workpieces and comprehensively considered the processing efficiency. and polishing effects to find the optimal solution.

The abrasives are silicon carbide particles with an average particle size of 400 mesh, and the fluid is formulated with aviation kerosene as the base and a certain amount of suspending agent, emulsifier and antioxidant added.

This formula is very versatile and can be used on most deep hole and variable-diameter pipe workpieces.

Chang Haonan even spent an extra day to complete the design of the PLC program.

This procedure is also the top priority of the abrasive flow machining system.

Because soft abrasives are not as "obedient" as grinding wheels, it is easy to cause over-processing problems. That is, after the remelted layer has been removed, the base material on the inner wall of the air film hole continues to be ground, eventually causing the workpiece to be scrapped.

A good PLC program can avoid this problem to a large extent.

On the other side, although Han Youde looks a little arrogant, he does have real talent and practical knowledge. It only took him three days to complete the overall design of the abrasive flow equipment. When Chang Haonan combined the abrasives and PLC program When it was done, the equipment of Shengjing No. 1 Machine Tool Factory also went offline while the masters worked in three shifts overnight.

Zhong Shihong has been so happy these days that his face is almost smiling——

Since the application he submitted has been approved, the Seiko Project has officially been "established."

And considering the huge impact this plan may have in the future, the higher-level departments directly promoted it to a national-level project led by the Committee of Science and Industry.

Even Chang Haonan, who was unemployed, was designated as "General Technical Advisor" by Ding Gaoheng.

As the flagship of the entire plan, this abrasive flow processing equipment has naturally received considerable attention.

The grinding process may seem inconspicuous, but it is actually an essential part of the finishing process.

Therefore, almost all units participating in the Seiko Project sent technical personnel to see with their own eyes the new tricks produced by the 410 Factory.

In the following day, the raw materials on the list were purchased one after another and transported to the 410 Factory. After a series of processes such as emulsification, stirring, and blending, they finally formed a lead-gray paste-like semi-solid, which was then poured into the prepared abrasive tank. among.

Operators begin the final technical inspection before starting up the equipment.

Since there were so many onlookers and a necessary safe distance had to be maintained between the production equipment and the production equipment, many people could only take a glance at it from a distance.

"Is that black thing the core technology they developed?"

An old engineer with half white hair was a little doubtful.

Soft abrasives look just like a lump of half-melted ice cream, and they really don't look that good.

And in general understanding, the process of "grinding" requires using a harder thing to remove softer things. Soft abrasives will indeed have an impact on traditional concepts.

Judging from the temporary pass hanging around his neck, he came from Bingcheng Boiler Factory.

This factory does not burn boilers, but makes boilers. Most of the coal-fired boilers used for power generation in the country and many power boilers supporting steam turbines come from here.

Recently, they were bidding for a power boiler production project for a new guided missile destroyer, but they were always troubled by insufficient processing and manufacturing capabilities, and several key indicators failed to meet the requirements.

At this most critical juncture, the news came that the Science and Technology Commission was presiding over the launch of the Seiko Plan. Bingcheng Boiler Factory almost rushed to get on the bus at the last moment before closing, and it did not know much about the situation at the 410 Factory. few.

"Yes, I heard a report last night. They said it can increase the polishing efficiency of irregular surfaces by more than five times, and it can also handle difficult workpieces such as deep inner holes and variable-diameter pipes."

Next to him, another engineer from the 408 Factory of Shaanxi Diesel Heavy Industry was much more comfortable.

Their situation is similar to that of Bingcheng Boiler Factory. Recently, they were responsible for the licensed production of diesel engines from MTU Company. However, the crucial localization rate indicator was stuck at a threshold and was unable to make further breakthroughs. So after learning that This Seiko project required participation from the first moment, and a large amount of project funding was also provided.

"I'll go, 5 times...can't it be a satellite?"

"Just watch, it shouldn't take too long."

While the onlookers were discussing, the trained technical workers had completed loading and setting the processing program.

This process was originally planned to be operated by Chang Haonan himself, but the latter believed that the advantages of this "fool-like" software could be better demonstrated by workers with ordinary education levels.

The lubricating oil elbow on the turbojet 14 is tightly fixed by a clamp——

Factory 410 itself does not have the ability to conduct metallographic inspection of the inner wall of the air film hole, so in order to more intuitively demonstrate the ability of abrasive flow processing, Zhong Shihong and Chang Haonan finally decided to make a variable-diameter bent pipe that is equally difficult to process. To get the "first blood" of this device.

To be precise, it should be half a piece, because a part was cut off from the front, which will be used to compare with the situation after processing.

The start button is pressed and the compressor hums.

There seemed to be no change at first, but after about ten minutes, toothpaste-like waste abrasive began to be squeezed out from the preset drainage holes around the clamp.

The workers who had been waiting for a long time immediately began to fill in the prepared new abrasive.

Processing continues.

No one present felt bored.

For such a complex workpiece polishing process, it is normal for it to last several hours.

……

After about 50 minutes, the clamps were opened.

There seems to be no change in the appearance of the workpiece after being rinsed with aviation kerosene.

"It's less than an hour...isn't there not enough time?"

"If it's five times more efficient, it's pretty much the same..."

The operators were not bothered by these discussions:

"Get on the cutting machine!"

The inner diameter of the lubricating oil pipe is enough to directly insert the probe into it for surface roughness testing, but from an intuitive perspective, it is definitely better to cut it directly.

The two workpieces, polished and unpolished, were quickly split in half down the middle.

Under the factory lights, you can see the difference even with the naked eye.

The inner wall of the workpiece on the left is so bright that it can almost function as a mirror.

Of course, for the sake of rigor, the tests that should be done must still be done.

"The inner wall of the workpiece before polishing has an average roughness Ra value of 1.466."

Chang Haonan went into battle personally and read out the first test result displayed on the screen.

The crowd of onlookers who had been discussing just now also fell silent.

Everyone is waiting for his next words.

"The average roughness of the inner wall of the workpiece after polishing..."

"Ra value=0.367!"

The surrounding area almost instantly boiled——

"I'll be a good boy..."

"Can it really be that fast?"

"..."

On the other side of the crowd, several men wearing aviation industry work clothes looked at the machines in front of them with almost glowing eyes.

As a brother unit within the system, it is natural for them to receive some special treatment during the visit, so they can observe the entire process from a better angle and closer distance.

"Gong Zhang, this..."

A relatively young engineer said in a voice trembling with excitement:

"If this can be used, Sibei's localization should..."

Apparently, they came from the 430 factory in Hokyung.

Although the introduction and assembly of the SPEI MK202 engine was completed in the mid-70s, due to various reasons, the actual localization work went through many twists and turns, and it was not until 1995 that it passed acceptance.

It is said to be "localized", but in fact, the localization rate of Sibei at this time is only 70%, and a large number of core components are still imported from stocks more than ten years ago.

Yields are low and unsustainable.

Originally, when the Sibei technology was introduced, there were many conflicts between Hao Jing and Sheng Jing.

But as the original Spey engine on the JH-7 gradually reaches its end of life, the pressure on the former is also increasing day by day.

Especially when the Turbojet 14 made big news at the Xiangzhou Air Show some time ago, it would be absolutely false to say that I am not jealous or envious.

Therefore, Factory 430 did not care about any face issues and directly sent over a group of engineers responsible for the Sibei localization project.

"It should be a big step forward!"

The middle-aged man named Zhang Gong said and punched the air in front of him:

"It's better to ask the 410 Factory for help than to ask the British for help."

"I'll go find Zhong Shihong myself!"