Chapter 177 Revolution in the field of finishing (Happy National Day!)

After catching this fleeting thought, Chang Haonan suddenly felt that the road was getting wider.

The hole diameter (tooth gap) of 0.3mm is a difficult size for a reamer (toothpick) to handle, and the microstructure inside the hole is also very unfriendly to the reaming process.

Moreover, the reamer has to rotate after all, so it cannot be made of high-hardness but brittle materials, otherwise it will easily collapse.

Just like toothpicks break easily during use.

But to change the idea, process ultra-high hardness corundum or diamond into powdery objects with a particle size of about 100 microns or even smaller, then mix them with water or oil or other fluid matrix, and pressurize them The air film holes flowing through the blades can completely meet all the conditions written on the notebook.

This is the idea of ​​​​the dental rinse device used by many people in later generations.

"Comrades, I have an idea."

Chang Haonan put down the water glass in his hand.

Everyone's eyes turned over instantly.

Although he is not an engineer at Factory 410, he does not seem to have any experience in the manufacturing field.

But in the past six months, Chang Haonan has created too many miracles on the J-8C and Turbojet 14.

Enough for everyone here to ignore his intellectual background.

"I thought of a new way of grinding."

Chang Haonan stood up as he spoke, came to the blackboard not far behind him, picked up a piece of chalk, and drew something similar to a funnel on it:

"The general structure of this equipment should be like this. There are two symmetrical cylinder-shaped containers. The parts and fixtures are fixed in the channel between the two containers and the piston in the cylinder squeezes the abrasive to flow back and forth. The relationship between the abrasive fluid and the surface to be processed The flow between them can produce grinding effect."

His drawing skills were average, and many of the proper nouns in mechanical processing were not used strictly enough. Fortunately, the audience below were all knowledgeable, and he could still understand the schematic diagram on the blackboard even while drawing and talking.

"Sandblasting process?"

Soon someone said a noun:

"It is said that in Germany, this method is used for polishing when manufacturing internal combustion engine cylinders, but it mainly relies on the impact of the spray material on the surface of the workpiece. There are certain requirements for the particle size and size of the abrasive, which is difficult to use in our application. Above the air film holes of this size."

This process name is new knowledge to Chang Haonan. He has not been exposed to it before, but from the other party's words, he still heard the difference between his own thinking:

"So we can't just copy these processes over."

Chang Haonan drew a key symbol on the abrasive part inside the container:

"The fluidity and controllability of pure solid abrasives are too poor. During the processing process, they will inevitably cause damage to the parts of the turbine blade surface that do not need polishing. So my idea is to use very fine hard particles, such as Silicon carbide, white corundum, and diamond are mixed with related liquids to prepare a paste-like, semi-fluid medium as an abrasive."

"As the saying goes, water has no shape. Such soft abrasives can automatically drill into the holes that need to be polished under pressure like a liquid without having much impact on the outer surface. Don't talk about our straight-through air film holes. , even curved holes and special-shaped holes with more complex internal structures can be processed using this method!”

After a long paragraph was finished, the entire conference room was silent.

Everyone, including Zhong Shihong, began to seriously think about the feasibility of the ideas on the blackboard.

Although the chalk drawing itself is slightly abstract, the ideas contained in it are obviously extremely valuable.

Grinding, similar to turning, milling, planing, etc., is also a typical cutting processing method.

However, with the increasing demand for surface smoothness and the emergence of various non-planar and non-axisymmetric parts, traditional grinding machines have been difficult to meet the increasingly bizarre industrial requirements.

Especially uneven surfaces and curved channels cannot be effectively processed by ordinary tools and molds.

This is also a recognized problem in today's finishing field.

The answer currently given by developed countries is electrochemical grinding.

It’s said to be grinding, but what really comes into play is the electrolysis process.

The workpiece to be processed is used as the anode of the electrolytic cell, and polishing is achieved under the condition of electricity through the difference in chemical potential between the metal matrix and the surface impurity layer.

Obviously, this requires an extremely strong level of electrochemistry. As long as the control conditions fluctuate slightly, intergranular corrosion can easily occur, causing the entire product to be scrapped.

If Factory 410 has this ability, it would be better to use electro-hydraulic beam processing from the beginning to avoid the formation of a remelted layer from the root.

In fact, this is also a common problem in China's manufacturing industry today.

It’s not that a certain key technology fails, but that everything fails. With so many clues, it’s even difficult to find a quick-effective starting point.

Factory 410 is just a microcosm of it.

This leads to the fact that even if some technological breakthroughs are made, such as electric spark drilling technology, there are still shortcomings in other aspects of the entire process, and the final product is often difficult to satisfy.

Chang Haonan's idea is equivalent to making the shortest board of the barrel longer.

If it can be realized, it will definitely not be just the 410 factory that will benefit.

The entire machining industry, and even the entire manufacturing industry, will directly benefit from this!

"I think this idea...is worth a try!"

The first person to speak was the engineer in charge of the product post-processing section:

“But based on my experience, the core technology of this process should be the formula of soft abrasives and the pressure parameters during grinding of different workpieces.”

"If we have to start from scratch in this aspect, we may have to be prepared for a long-term battle."

According to common sense, his concerns are obviously justified.

This thing is somewhat similar to materials science. When you first start researching, it is difficult to determine the direction directly. You often need to cast a wide net to try your luck.

For example, the composition, ratio, and particle size of the abrasive particles, as well as the viscosity and chemical properties of the abrasive matrix, etc., all need to be tried out bit by bit.

Later, as the research process becomes more and more in-depth, we can slowly find some rules and reduce blindness to a certain extent.

However, there happens to be an unconventional person here.

"Don't worry about that."

The most troublesome part in the eyes of others is actually what Chang Haonan is best at:

"Regarding the development of soft abrasives and the control system during processing, I can use some simulation methods to initially determine the most feasible research direction. The progress should be much faster than you expected."

“But other parts of this grinding equipment, especially the tooling fixture and the mechanical structure that specifically realizes the piston extrusion in the cylinder, need other people to help me complete it.”

After Chang Haonan finished speaking, he gently put down the chalk in his hand.

What came into view were a dozen faces full of stunned expressions.

"This... can also be simulated?"

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