(greatly add 3/20 for driden)

Because the military attached great importance to the matter of 203 mm howitzers, Liu Yijiu was a little unhappy, and he did not go to visit the shelling, let alone see the execution of Ma Hansan with shells, but returned directly to the Ninth Courtyard.

Once again, he lived his original simple life of working all day and sleeping a little time.

Li Rui, who was on vacation on Woody Island, also came back, his originally snow-white skin was tanned by the sun of Woody Island, and he didn't ask Liu Yijiu about going to Nipudosan, and he didn't mention Situ Xue and her children.

It's just that he is more gentle with Liu Yijiu, except for the few days when his aunt came, he had to ask Liu Yijiu to pay the public grain every day, which made Liu Yijiu embarrassed.

It didn't take long for the person to lose a lot of weight.

Now the domestic five-axis machining center has reached a critical moment, Liu Yijiu is in the third area every day, and personally participates in the debugging and design work of various control systems. Most of them are for a purpose - the success of domestic five-axis CNC machining centers.

The impact of the five-axis machining center on the entire industrial base of China is clear to those who are knowledgeable.

Liu Yijiu holds the distribution right of thirty five-axis CNC machining centers, and as a result, even the good tea and good wine collected by Ziyang Zhenren, Li Yunlong, Long Yaohua and others have been wiped out by him.

From this, we can see the importance of five-axis CNC machining centers.

"This assembly. I hope to be able to achieve the accuracy of our design, although it is much worse than the accuracy of the Japanese. If it can be made and used for semi-finishing, the Japanese five-axis machining center can be used for finishing. Looking at the five-axis machining center that has begun to gradually take shape in front, but without an outer shield, Xie Heping said with some heartache.

Liu Yijiu was too haggard during this time.

For the sake of the five axes, he ate and lived directly in the workshop, and even Li Rui refused to ask him to go back to rest.

How did he know. Is Liu Yijiu afraid to go back and pay the public grain? Obviously, every time Li Rui was about to faint, it was like eating a strong King Kong pill after a while, and he would be resurrected with full blood in minutes. Although Director Liu has good physical strength, he can't stand the physical and mental exhaustion during the day, and he still has to work hard at night?

"For manufacturing, our pursuit. It never stops. The Japanese were able to make it. Why can't we? "Yu Jianguo is now arrogant.

Cao Zhijiang was on the side and pouted directly.

"Our industrial base can't be compared." Liu Yijiu shook his head and sighed.

Under the careful assembly of many skilled workers who are over 50 years old, the first domestic five-axis CNC machining center (which can be used) was quickly assembled.

A five-axis machining center with a height of nearly two meters, a width of two meters and a length of about three meters, which is not much different from an ordinary gantry milling machine.

Since the five-axis machining centers studied are all used for high-precision machining of relatively large parts. The main thing is the processing of the turbofan engine's impeller, blades and other parts, and all of them directly choose a relatively simple gantry structure.

X-axis direction. Due to the relatively long stroke, the column with the main shaft is directly moved, and in the Y-axis direction, the main shaft moves back and forth on the beams above the two columns.

The workbench is fixed because it is equipped with a C-axis that rotates around the vertically downward spindle, and the spindle can swing left and right directly......

"This is the easiest, for the sake of precision, we give up the rigidity and processing efficiency of the machine, if it is not successful, we have to go home with the children......"

"Okay, no, I don't want to go home and take the children more leisurely! There's a lot going on here! Xie Heping directly gave Yu Jianguo a roll of his eyes.

"Lao Cao, there is no problem with the CNC system over there, right?" Cao Zhijiang is responsible for the design of the CNC system, which is his strength. In particular, the participation of Professor Pali Guo, who participated in the Dawning Project, has made the Ninth Academy stronger in terms of computers.

CNC machine tools, in layman's terms, are machine tools controlled by computers.

Several cores of the machine tool, the numerical control system, are in the first place.

"There is no problem with the simulation, as long as the mechanical part is determined, we can start running and closing ......"

"Then start and run, don't rush, take your time, this machine tool is the simplest five-axis." Liu Yijiu said not to be nervous, that was false.

In order to improve the manufacturing technology of CNC machine tools, he directly abandoned the solution of using PLC-controlled rotary tables to install three-axis machining centers to form simple four-axis machining centers. This kind of plan is a garbage plan thrown out by foreign countries in order to prevent China's progress in CNC machining centers.

The simple four-axis can realize some four-axis functions, but it can only be used for small parts manufacturing.

Otherwise, a real four-axis machining center is much different from a simple four-axis rotary table with PLC control.

As the first batch of CNC machine tool operators in the Ninth Academy, Jia Ling's talent is undeniable.

From having no foundation at all, to being one of the best operators of CNC machining centers, it took her only six years.

Originally, the test can be operated by anyone, and only need to press the red emergency stop button on the control cabinet in case of failure, but the test sometimes requires the experience of the operator, when to stop, and what the consequences will be, are very critical.

"Let's get started!" Liu Yijiu and others took a few steps back, and for safety reasons, the spindle of the machine tool was not equipped with a tool handle.

Jia Ling took a deep breath to calm herself down, which was even more nervous than the first time she opened a machining center.

Because it's five axes!

The first five-axis domestic in the republic.

Although, it seems, this thing is ugly, it doesn't feel domineering at all, and it doesn't even look like a high-tech product.

After checking the running and closing procedures, Jia Ling checked some machine tool monitoring parameters, adjusted the feed speed directly to five percent, and adjusted the spindle speed rate to zero, and then stretched out her green white finger and gently pressed it on the small green button on the control cabinet.

The hearts of Liu Yijiu and the others suddenly tensed up with Jia Ling's movements.

With Jia Ling's movements, the spindle of the machine tool, which was originally stationary, began to run slowly along with the X-axis direction of the length.

On the girder between the two columns, the spindle also began to run slowly along the Y-axis, and below the spindle, a small spindle like a robotic arm began to swing from side to side.

Not only that, but even the rotary table in the center of the workbench began to rotate slowly.

"Speed up! The feed rate is increased to 30%, and the swing speed is increased to 20 ......percent." Yu Jianguo asked Jia Ling to speed up the running speed of the machine tool after running for more than ten minutes.

Soon, the mechanism that the entire machine can move begins to pick up speed, but it is still not very fast.

"To 50 percent ......"

"Wait a minute, change to a single-axis run, if you go on like this, too fast will cause problems with the column." Liu Yijiu directly stopped it.

When the five-axis machining center is working, although it is a five-axis linkage, there will never be a problem that the five axes move together at high speed during the machining process. Otherwise, it will have a very big impact on the service life of the machine tool, and at the same time, it will make the machine tool have a very big safety hazard.

This kind of test is inherently undesirable, and it is not a problem if there is no problem.

Jia Ling rotated the knob to adjust the feed rate on the control cabinet, and he did not directly rotate to the 50% position at once, but did not increase it by 10%, paused for about a minute, and then continued to adjust. That's why she was chosen to operate.

If you change to someone else, you will directly jump from 30% to 50% of the parameters.

"100 percent ......" Liu Yijiu saw that there was no problem with the operation, and directly let it run 100 percent.

You have to run to the limit to find the problem.

Slow movement, unless there are some big problems that will be exposed.

"Huhuhu......"

The columns running at full speed, the sound of friction, and the sound of the wind during the movement are very worrying.

However, such a run, each axis, takes dozens of hours.

"There is no problem with the operation, directly on the wax mold for trial cutting or use the program for trial run first?" For the five-axis machining center, Yu Jianguo believes that he does not know as clearly as Liu Yijiu.

He is responsible for mechanical automation and hydraulics, and Cao Zhijiang is responsible for the control system, as well as pneumatics, standard formulation, and so on.

"Be safe, let's use the program to run it first, although we have completed the run, this can only prove that there is no problem with the moving process, the control system has always been very critical, and only by using the program to integrate all the functions of the entire machine tool, can it be found. Before the processing test cutting, it is better to test it first, and it is now that there is no need to rush this time. This is just the simplest ...... of the five-axis machining center," Liu Yijiu sighed.

Sometimes, there is no way to speed up time during the research process.

Because you can't miss out on small experiments that seem very unimportant, but are very critical.

"Okay, the impeller machining program for our engine has been programmed, so let's use this for dry run first?"

"You're the project leader, don't ask me!" Liu Yijiu was very dissatisfied with these guys in the Ninth Academy.

When he is not there, these guys can be on their own, although slowly, they can also develop rapidly, and when they are there, they have to ask themselves about everything big and small.

Such a thing is a headache for Liu Yijiu now.

Especially in Jialing Machinery Factory, until now, he has not come up with a car design plan that can satisfy him!

(To be continued.) )