Chapter 904 Preparing for Trial Production

For Chang Haonan, being the editor-in-chief of JCAS is not his main job, at least not for now.

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

As for him, after a period of rest, he returned to the project at hand.

During this period of time, the engineering prototype of the ultra-short laser processing equipment that Haojing Optics and Mechanics Institute was responsible for had reached the end of the production stage.

Only a few imported wedges and lenses are still on the way.

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 needs to be imported from abroad.

This thing needs to be highly customized and is much more complicated than most optical components.

But after the prototype was put into operation, the project team discovered that Torch-CB Ferrari could actually provide similar equipment directly.

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 four axes: X, Y, B (rotation around Y), and C (rotation around Z), while the milling cutter (laser) moves in the Z direction.

Since the laser itself does not need to perform main motion (rotation) while feeding like a milling cutter, this is basically the easiest processing method to implement.

In short, as long as it undergoes simple improvements, it should not be a problem to at least use it on the prototype.

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

Of course, Academician Hou is in charge of the hardware research and development and production of the equipment itself, and Chang Haonan does not need to be involved in everything.

But Academician Hou is only a laser processing expert after all, not an aviation engine expert.

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

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

After all, there will be a vast number of workpieces that will require ultra-short laser processing in the future, and it is impossible for Chang Haonan to be responsible for each one.

The ultimate goal should be to achieve something similar to mechanical processing, which can be accomplished by on-site engineers or the design and development team of the workpiece itself.

However, this process needs to be gradual.

Right now, Factory 112 and Factory 132 are both clamoring for more WS-10 production capacity, so this pressing issue must be resolved first.

……

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

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

6 month 30 day.

The trial production location is naturally at the new site 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 frame and messy wiring, there are still many places where it is just a makeshift one.

It is not easy to debug this kind of equipment to normal state.

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

In comparison, bringing a few semi-finished workpieces from Shengjing is obviously a simpler solution.

Therefore, one week before the trial production date, an aero-engine production technology team from the Liming Factory, personally appointed by Chang Haonan, came to Beijing with various technical materials and a set of turbine blades that had completed other processes except for the processing of air film holes.

The person leading the team was naturally Zhong Shihong, who was responsible for the production of WS-10.

After meeting, after just a brief greeting, everyone went to Laboratory Building No. 1 of the Torch Laboratory.

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

However, for this kind of unfamiliar equipment, a round of training is still required before you can really 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 principle diagram of the ultra-short laser processor was being projected.

"Everyone, time is short and the task is heavy. We will not waste any more time and will directly start with the principles of the processing system."

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

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

"In theory, this device is equipped with a self-check and troubleshooting system similar to that on our WS-10 engine. Even if an error occurs, the specific location of the problem will be displayed in the system. However, as core engineers, you should still have a deep understanding of the device hardware..."

"It should be noted 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 and dust removal module does not need to be put into use for the time being."

"But on mass-produced machines, we may use coaxial jetting technology to allow the laser and salt solution to be coaxially sprayed onto the material surface, which requires us to consider the issue of air blowing and dust removal..."

"..."

Chang Haonan clicked the mouse and turned the PPT to the next page, and began the process-level introduction:

"For materials with different characteristics to be processed, I designed a set of numerical calculation methods that 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 derived from calculations. Production tests are still needed 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 now, so let's put them aside for now. What you need to determine are mainly the number of scans, repetition frequency, scan speed, pulse energy, feed rate, feed path, number of layers, and processing environment, a total of eight parameters..."

"..."

"One thing we need to pay extra attention to is that our turbine blades are not made of a single material, but have a heat-insulating coating on the surface. This may not make much difference for mechanical processing, but for laser processing, the processing techniques for 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 the entire afternoon.

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

For engineers who do not have a theoretical background, it is indeed beyond their capabilities to use this algorithm to obtain very specific results.

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

Therefore, he spoke in great detail.

The engineers sitting below were almost writing with their pens sparking.

Especially Zhong Shihong.

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

And this time, if the production of WS-10 can be finalized through his hands, it will definitely be a very important bargaining chip for him to compete for the position of general manager in the future.

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

Compared to the time when he was working on WP-14, his knowledge of numerical calculation theory has improved a lot.

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

"Comrades."

After Liu Chenchen refilled Chang Haonan's cup with water 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."

"This trial production is one of the most critical links in the production and finalization process of the WS-10. I know that everyone is somewhat anxious."

Chang Haonan returned to his seat at the conference table, holding a glass of water. He calmly glanced at the dozen or so key members in front of him:

"However, ultra-short laser processing is a new technical direction after all, so even I or Academician Hou cannot guarantee that all situations have been taken into account 100%."

"So, if you find any possible problems, you must report them according to the regulations. Don't worry about affecting efficiency, and don't take it for granted. Do you understand?"

"understand!"

Everyone answered in unison.

"it is good."

Chang Haonan nodded and took a deep breath:

"Then prepare according to the tasks just assigned!"