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 ultra-short 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 and is much more troublesome than most optical components.

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

The principle of the ultra-short 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) while feeding like a 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-produced 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 intervene in everything.

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

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 ultra-short 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 something similar to machining, which can be done by the resident engineer or the design and development team of the workpiece itself.

However, this process must 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 increasing.

Finally, the date of 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.

After all, it is an engineering prototype.

Although the degree of completion is much higher than that of the principle 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.

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

In comparison, it is obviously a simpler way to bring a few 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 the meeting, after just a few simple greetings, everyone came to the No. 1 Experimental Building of the Torch Laboratory.

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

However, for this kind of 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 ultra-short 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 lasers cannot completely eliminate the thermal processing effect, 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 spray the laser and salt solution coaxially onto the material surface, so we need to consider the issue of blowing dust..."

"..."

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

"For materials to be processed with different characteristics, I have designed a set of numerical calculation methods, which can guide the design of processing technology 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 required to finally determine the specific process parameters, which is also the main content of this test."

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

"..."

"There is one extra thing to note. Our turbine blades are not made of a single material, but have a layer of heat insulation coating on the surface. This may not make much difference for mechanical processing, but for laser processing, the processing processes corresponding to the coating section, transition section and metal matrix are not the same, 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 who are not from a theoretical background, it is indeed beyond their ability to rely on this algorithm to obtain very specific results.

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

Therefore, he talked in great detail.

The pens of several engineers sitting below were almost sparking.

Especially Zhong Shihong.

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

And this time, if the production of the turbofan 10 can also be achieved through his hands, then it will definitely be a very heavy bargaining chip for the future competition for the position of general manager.

For this reason, Zhong Shihong has been working hard for several years.

Compared with the turbojet 14, his level of numerical calculation theory has improved a lot.

At least this time, I can follow Chang Haonan's thinking...

"Comrades."

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

"The biggest problem restricting the increase in the production capacity of WS-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."

"And this trial production is one of the most critical links in the production and finalization process of WS-10. I know that everyone is a little anxious."

Chang Haonan returned to the seat in front of the conference table with a cup of water, and his eyes calmly swept over the dozen key members in front of him:

"However, ultra-short laser processing is a new technical direction after all, so even I, or Academician Hou, dare not guarantee that all situations are 100% considered."

"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 it for granted. Do you understand?"

"Understood!"

Everyone answered in unison.

"Okay."

Chang Haonan nodded and took a deep breath:

"Then prepare for the tasks assigned just now!"