The Military-industrial Scientific Research System of the Academic Master Chapter 904

Chapter 904 Preparing for trial production

For Chang Haonan, being the editor-in-chief of JCAS is not, after all, at least not his main business right now.

Therefore, after finalizing the list of papers published in the first issue, as well as the front and back covers, Chang Haonan handed over the subsequent specific work to the two deputy editors in the editorial department.

As for himself, after taking a break, he returned to the project at hand.

During the previous period, the engineering prototype of the ultrshort laser processing equipment that Haojing Optical Machinery was responsible for has also reached the end of the production stage.

Only a few optical wedges and lenses that need to be imported are still in transit.

It will probably be completed about a month ahead of schedule—

According to Chang Haonan's original plan, the multi-degree-of-freedom mobile positioning module responsible for controlling the movement of the workpiece also needed to be imported from abroad.

This thing requires a high degree of customization, which is much more troublesome than most optical components.

But after the prototype was built, the project team discovered that Torch-C.B. Ferrari could directly provide similar equipment.

The principle of the ultrshort laser processor is similar to that of a new model of CNC milling machine over there. The workpiece moves on the four axes of X, Y, B (rotating around Y), and C (rotating around Z), and the Z direction is determined by Milling cutter (laser) movement.

Since the laser itself does not require main movement (rotation) at the same time as the milling cutter, this is basically the easiest processing method to implement.

In short, as long as it is simply improved, it will not be a problem to at least use it on a prototype first.

As for the mass production model, there are still many opportunities to slowly debug it.

Of course, Academician Hou is responsible for the hardware development and production of the equipment itself, and Chang Haonan does not need to interfere in everything.

But after all, Academician Hou is only an expert in laser processing, not an aerospace engine expert.

Therefore, Chang Haonan still needs to be responsible for determining the specific process parameters of the prototype trial production process.

In fact, the ultimate goal should be to identify a class of process methods.

After all, there are so many workpieces that need to be processed by ultrshort laser processing in the future, and it is impossible to come to Chang Haonan to be responsible for each one.

The ultimate goal should be to achieve similar results to machining, which can be done by the resident engineer or the design and development team of the workpiece itself.

It's just that this process has to be done step by step.

At present, both Factory 112 and Factory 132 are clamoring for more turbofan 10 production capacity, so this urgent matter must be resolved first.

As time goes by, the degree of completion of the engineering prototype is getting better and better.

Finally, the date for the first trial production was determined on the last day of the first half of 2001.

June 30th.

The location of the trial production is naturally at the new location of the Torch Laboratory.

It is an engineering prototype after all.

Although the degree of completion is much higher than that of the prototype, which only has a shelf and messy cable management, there are still a lot of things that make do.

For this kind of equipment, it is not easy to debug it to normal state.

You still have to abide by the programming philosophy of "don't move if you can run".

Comparatively speaking, it is obviously a simpler way to bring several semi-finished workpieces from Shengjing.

Therefore, one week before the trial production date, an aviation production technical team from Liming Factory, personally named by Chang Haonan, brought various technical materials and a group of turbines that had completed other processes except for the air film hole processing. Ye Ye came to the capital.

The person leading the team is naturally Zhong Shihong, who is responsible for the production of turbofan 10.

After meeting, only after some simple greetings, everyone came to the No. 1 Experimental Building of the Torch Laboratory together.

The engineering prototype is placed in the trial production workshop here.

It's just that for this unfamiliar equipment, you still need to go through a round of training before you can actually get started.

After a brief rest and lunch, everyone took their seats.

Immediately afterwards, Chang Haonan, wearing a lab coat, came behind the small desk. On the screen next to him, the basic schematic diagram of the ultrshort laser processor is projected.

“Everyone, time is tight and the task is heavy, so we won't waste any more time and start directly from the principles of the processing system.”

Chang Haonan turned slightly sideways and pointed at the curtain with a pointer:

“The entire processing equipment can be divided into seven parts: laser generation module, optical transmission track changing module, multi-degree-of-freedom mobile positioning module, monitoring and detection module, air blowing and dust removal module, solution circulation module and controller module. The core components of each part are I have already written the parts on the PPT.”

"Theoretically, this equipment is equipped with a self-inspection and troubleshooting system similar to that of our turbofan 10 engine. Even if an error occurs, the specific location of the problem will be displayed in the system, but as core engineers, you should still Have an in-depth understanding of device hardware…”

“An additional explanation is that because picosecond-level lasers cannot completely eliminate thermal processing effects, we will immerse the workpiece in a neutral salt solution for production, so the air blowing dust removal module does not need to be put into use for the time being.”

“But on the mass production machine, we may use coaxial injection technology to allow the laser and salt solution to be coaxially injected onto the material surface, so we need to consider the issue of air blowing and dust removal...”

Chang Haonan said as he clicked the mouse, turned the PPT to the next page, and began to introduce the process level:

“For materials with different characteristics to be processed, I have designed a set of numerical calculation methods that can guide the design of processing processes from the perspective of surface molecular dynamics.”

"However, because computational materials science is still in a very preliminary stage of development, not all content can be directly calculated. Production testing is still needed to finally determine the specific process parameters. This is also the main purpose of this test. content."

"Specifically, parameters such as laser pulse width and wavelength cannot be adjusted temporarily on this engineering prototype, so put them aside for now. What you need to determine are mainly the number of scans, repetition frequency, scan speed, pulse energy, and There are a total of eight parameters including feed rate, feed path, layer level and processing environment..."

"One thing that needs extra attention is that our turbine blades are not made of a single material, but have a layer of heat-insulating coating on the surface. This may not be a big difference for mechanical processing, but for laser processing, the coating section and transition The corresponding processing techniques for the three parts of the segment and the metal matrix are different, so the processing needs to be segmented..."

Chang Haonan's lecture speed is as fast as ever.

Even so, this first technical meeting still lasted a whole afternoon.

Mainly, Chang Haonan spent about three hours introducing how to apply the new calculation method he developed.

For engineers with non-theoretical background, it is indeed beyond the scope of ability to rely on this set of algorithms to obtain very specific results.

But if we are just preparing to provide qualitative guidance on process testing, it should be possible.

Hence, he spoke in great detail.

The engineers sitting below are almost writing out sparks with their pens.

Especially Zhong Shihong.

Four years ago, he was promoted from the director of the technology department to the deputy general manager of Liming Group precisely because of the successful mass production of the turbojet 14.

And this time, if the production of the Turbofan 10 can be finalized through his hands, it will definitely be a very important bargaining chip for the future competition for the position of general manager.

Zhong Shihong has been working hard for several years to this end.

Compared to the time of Turbojet 14, his level of numerical calculation theory has improved a lot now.

At least this time, I can think along the lines of Chang Haonan...

“Dear comrades.”

After Liu Chenchen refilled the cup in front of Chang Haonan for the sixth time, the meeting finally came to an end:

“The biggest problem currently restricting the increase in the production capacity of turbofan 10 is that the processing efficiency and yield rate of special-shaped air film holes cannot meet the standards, resulting in high production hours and production costs.”

“This trial production is one of the most critical links in the production and finalization process of the turbofan 10. I know that everyone is somewhat anxious.”

Chang Haonan returned to his seat in front of the conference table with a glass of water in his hands. His eyes calmly glanced at the dozen key members in front of him:

“However, ultrshort laser processing is a new technical direction after all, so even I, or Academician Hou, cannot guarantee that all situations will be taken into account 100%.”

“So, if you find any possible problems, you must report them in accordance with the regulations. Don't worry about affecting efficiency, and don't take things for granted. Do you understand?”

"clear!"

Everyone answered in unison.

"good."

Chang Haonan nodded and took a deep breath:

“Then let's prepare according to the tasks just assigned!”

(End of this chapter)

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