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

The design of the discrete element simulation software took about a week, but the sharpening of the knife did not mistake the woodcutter, and the software made under the system buff was quite efficient, and soon the optimal solution was found according to the actual situation of several typical workpieces, considering the processing efficiency and polishing effect.

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

This formulation is very versatile and can be used with most deep hole and variable diameter tubing 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 processing system.

Because soft abrasives are not as "obedient" as grinding wheels, it is easy to over-process, that is, after the remelting layer has been removed, the substrate material on the inner wall of the air film hole continues to be grinded, which eventually leads to the scrapping of the workpiece.

A good PLC program can largely avoid this kind of problem.

On the other hand, although Han Youde looks a little arrogant, but there is real talent, he only took three days to complete the overall design of the abrasive flow equipment, when Chang Haonan here to get the abrasive and PLC program done, the equipment of Shengjing No. 1 Machine Tool Factory was also off the assembly line in the three shifts of the master overnight.

Zhong Shihong has been so happy these days that his face has almost bloomed with a smile -

Since the application he submitted has been approved, the Seiko plan has officially been "prepared".

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

Even Chang Haonan, who had no establishment on his body, was handpicked by Ding Gaoheng as a "technical chief consultant".

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

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

Therefore, almost all the units participating in the Seiko plan have sent technicians to see the new tricks of the 410 factory.

In the following day, the raw materials on the list were successively purchased and transported to the 410 factory, where they were emulsified, stirred, blended and other processes to finally form a lead-gray paste-like semi-solid, which was then poured into the prepared abrasive tank.

The operator begins the last technical check before the machine is turned on.

Because there are too many onlookers, and there is a necessary safety distance between them and the production equipment, many people can only look at it from a distance.

"That black thing, is the core technology they made?"

An old engineer with half-white hair was a little skeptical.

The soft abrasive looks like a half-melted piece of ice cream, and it really doesn't look good.

And in the general understanding, the process of "grinding" is to use a harder thing to remove the softer thing, and soft abrasives will indeed have an impact on the traditional concept.

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

This plant does not burn boilers, but builds boilers, and most of the coal-fired boilers used for power generation and many power boilers for steam turbines in the country come from here.

Recently, they were bidding for the power boiler production project of a new missile destroyer, but they have always been plagued by insufficient processing and manufacturing capacity, and several key indicators have not been able to meet the requirements.

At this most critical juncture, the news that the Science and Technology Commission presided over the Seiko plan came, and the Bingcheng Boiler Factory almost got on the car at the last moment before the final closing, and knew less about the situation on the side of the 410 factory.

"Yes, I heard the report last night, and they said that it can improve the polishing efficiency of irregular surfaces by more than 5 times, and it can also handle deep internal holes and variable diameter pipes."

Next to him, another engineer from Shaanxi Diesel Heavy Industry No. 408 Factory, is more than capable of maneuvering.

Their situation is similar to that of Bingcheng Boiler Factory, and they have recently been in charge of the licensed production of diesel engines for MTU Company, but the crucial localization rate index has been stuck on a threshold and has not been able to make further breakthroughs, so they asked for participation as soon as they learned about this Seiko plan, and also provided a large amount of project funds.

"I'll go, 5 times ...... It can't be a satellite, right? ”

"Look, it shouldn't take long."

While the crowd was discussing, the trained skilled workers had already completed the loading and setting of the processing program.

This process was originally planned to be operated by Chang Haonan himself, but the latter thought that the advantages of this "fool-style" software would be better reflected by the fact that workers with ordinary education level would do so.

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

The 410 factory itself does not have the ability to perform metallographic inspection on 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 let a variable diameter elbow with equally high processing difficulty to obtain the "blood" of this equipment.

To be exact, it should be half a root, because a part of it was cut off in the front, and it will be used to compare it with the situation after processing later.

The start button is pressed, and the compressor hums.

At first, nothing seemed to change, but after a decade or so, the toothpaste-like waste abrasive began to be squeezed out of the preset excretion holes around the clamp.

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

Processing continues.

None of the people present found it boring.

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

……

After about 50 minutes, the clamp opens.

After being washed with jet fuel, there seems to be no change in the appearance of the workpiece.

"It's less than an hour...... Isn't there a bit of a lack of time? ”

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

Operators were not bothered by these discussions:

"Get on the cutter!"

The inner diameter of the oil pipe is enough to plug the probe directly into it for surface roughness detection, but if it is intuitive, it must be better to cut it directly.

The polished and unpolished workpieces are quickly split in half from the middle.

Under the lights of the factory, even with the naked eye, the difference can be seen.

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

Of course, in order to be rigorous, the tests that should be done still have to be done.

"The inner wall of the workpiece before polishing, the average roughness Ra value = 1.466."

Chang Haonan personally went into battle 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 was waiting for his next words.

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

"Ra value = 0.367!"

The surroundings were in a boiling almost instantaneously-

"I'm ...... a good drop"

"Can it really be so fast?"

“……”

On the other side of the crowd, several men in aviation industry uniforms looked at the machine in front of them with almost glowing eyes.

As siblings within the system, it is only natural that they receive a little special treatment when they visit, so that they can observe the entire process from a better angle and at a closer distance.

"Zhang Gong, this ......"

A younger engineer said in a voice that was a little shaky with excitement:

"If this can be used, Spey localization should be ......"

Apparently, they came from the 430 factory in Hokyo.

Although the Spey MK202 engine was introduced and assembled in the mid-70s, due to various reasons in the middle, the real localization work went through many twists and turns, and it was not until 1995 that it passed the acceptance.

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

Yields are low, and they are not sustainable.

Originally, when Spey technology was introduced, there were a lot of conflicts between Hokyo and Shengjing.

However, as the original Spey engine on the J-7 gradually reaches its lifespan, the pressure on the former's head is also increasing every day.

Especially some time ago, the vortex 14 made a big news at the Xiangzhou Air Show, and it is absolutely fake to say that it is not envious.

Therefore, the 430 factory didn't care about any face problems, and directly sent a group of engineers in charge of the Spey localization project.

"It should be a big breakthrough!"

The middle-aged man known as Zhang Gong said and threw a punch into the air in front of him:

"It's better to ask the 410 factory to do things than to ask the British to do things."

"I'll go find Zhong Shihong in person!"

(End of chapter)