After grasping this fleeting train of thought, Chang Haonan suddenly felt that the road was wider.

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

Moreover, after all, the reamer is to rotate, and there is no way to make it from a hard, but brittle material, otherwise it is easy to collapse itself.

Just like a toothpick can easily break during use.

But to put it another way, if you process corundum or diamond with ultra-high hardness into a powdery object with a particle size of about 100 microns or even smaller, mix it with water or oil or other fluid substrates, and let them flow through the pores of the leaf film by pressurization, you can fully meet all the conditions written in the notebook.

That is, the idea of the oral irrigator 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 looked at it instantly.

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

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

That's enough for everyone here to ignore his intellectual background.

"I came up with 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 casually, and drew something a little like a funnel on it:

"The general structure of the machine should be as follows: there are two symmetrical cylinder-shaped vessels, and the parts and fixtures are fixed in the channels between the two containers, and the abrasive is extruded by the piston in the cylinder and flows back and forth. The flow between the abrasive fluid and the surface to be machined can produce a grinding effect. ”

His painting skills are average, and many proper nouns in machining are not strict enough, but fortunately, the audience below is knowledgeable, and even the drawing tape still understands the schematic diagram on the blackboard.

"Sandblasting?"

Soon someone came up with a noun:

"It is said that in Germany, this method will be used to polish when manufacturing internal combustion engine cylinders, but it mainly relies on the impact of spraying on the surface of the workpiece, and there are certain requirements for the particle size and size of the abrasive, which is difficult to use on the air film hole of our scale."

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

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

Chang Haonan drew an important symbol on the abrasive part of the container:

"The fluidity and controllability of pure solid abrasives are too poor, and it will inevitably cause damage to the parts of the turbine blade surface that do not need polishing during processing, so my idea is to mix very fine hard particles, such as silicon carbide, white corundum, diamond, and related liquids, into a paste-like, semi-fluid medium as an abrasive."

"As the so-called water impermanence, such a soft abrasive can be like a liquid, under the action of pressure to automatically drill into the hole that needs to be polished, without too much impact on the external surface, not to mention our straight through air film holes, even if the internal structure is more complex bending holes, special-shaped holes, can also be processed in this way!"

After a large section of the content was finished, the entire conference room fell silent.

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

Although the chalk drawings themselves are slightly abstract, the ideas contained in them are obviously extremely valuable.

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

However, with the increasing requirements of human beings for surface smoothness and the emergence of various non-planar and non-axisymmetric parts, it is difficult for traditional grinding machines to meet the increasingly strange industrial requirements.

In particular, concave and convex surfaces and curved holes cannot be effectively handled by ordinary tools and molds.

This is also a well-known challenge in today's finishing world.

The version currently given by developed countries is electrochemical grinding.

It is said to be grinding, but in fact, it is the electrolysis process that really plays a role.

The workpiece to be treated is used as the anode of the electrolytic cell, and the polishing is achieved when the metal matrix is different from the chemical position of the surface impurity layer, and the polishing is achieved when the electricity is applied.

Obviously, this requires extremely high levels of electrochemistry, and even the slightest fluctuation in control conditions can easily lead to intergranular corrosion, resulting in the scrapping of the entire product.

If Plant 410 has this capability, it is better to use electro-hydraulic beam processing from the beginning to avoid the formation of remelting layer at the root.

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

It's not that a key technology can't pass the test, but that it can't pass anywhere, and it is even difficult to find a quick starting point.

Factory 410 is just a microcosm of this.

As a result, even if some technological breakthroughs are made, such as EDM punching technology, the final product is often difficult to be satisfied with because there are still shortcomings in other aspects of the entire process.

And Chang Haonan's idea is equivalent to lengthening the shortest board of the original barrel.

If it can be realized, it is definitely not only the 410 factory that will get the benefits.

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

"I think the line of thought ...... It's worth a try! ”

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

"But in my experience, the core technology of this process should be the formulation of soft abrasives and the pressure parameters during the grinding of different workpieces."

"If we want to start from scratch and experiment a little bit in this regard, I'm afraid we have to be prepared for a long-term battle."

As a matter of common sense, his concerns were clearly justified.

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

For example, the composition, ratio, particle size, viscosity and chemical properties of the abrasive matrix of the abrasive particles have to be tested little by little.

Later, with the deepening of the research process, we can slowly find some rules and reduce blindness to a certain extent.

However, there happens to be a person who doesn't make sense here.

"Don't worry about that."

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

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

"But the rest of the grinding machine, especially the fixtures and the mechanical structure that actually realizes the piston extrusion in the cylinder, I need someone else to do it for me."

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

More than a dozen faces with stunned expressions came into view.

"This ...... Can it also be simulated? ”

Plus more

(End of chapter)