Super military empire

(Greatly added 3/20 for driden)

Because the military attaches great importance to the 203mm howitzer, Liu Yijiu felt a little unhappy, and did not go to see the shelling, let alone the execution of Ma Hansan with artillery shells, but went straight back to the Ninth Court.

He once again lived the simple life that he used to work all day and sleep a small part of the time.

Li Rui, who was on vacation on Yongxing Island, also came back. The original snow-white skin was tanned by the sunshine of Yongxing Island. He did not ask Liu Yijiu about going to Nipudosang, and there was no Tistuxue and her. Children's things.

It's just being more gentle with Liu Yijiu. Except for the few days when the aunt came here, Liu Yijiu had to pay the government food every day, which made Liu Yijiu very sleepy.

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

Now the domestic five-axis machining center has reached a critical moment. Liu Yijiu stays in the three districts every day, and personally participates in the debugging and design of various control systems.Most of them do it for one purpose-the domestic five-axis CNC machining center has successfully tackled key problems.

Anyone who knows how to influence the five-axis machining center on China's industrial base is clear.

Liu Yijiu holds the distribution rights of thirty five-axis CNC machining centers. As a result, even the good teas and wines collected by Zhenren Ziyang, Li Yunlong, Long Yaohua, etc. were all sold out by him. Qian Lao is so indifferent to fame and fortune. In order to gain more, the scientist also played against other bigwigs and lost his scientific demeanor.

This shows the importance of the five-axis CNC machining center.

"In this assembly, we hope to achieve the accuracy of our design. Although the accuracy is much worse than that of the Japanese, if it can be produced and used for semi-finishing, the Japanese five-axis machining center can be used. Yu is finished.” Seeing that the front has begun to take shape, but there is no five-axis machining center with an outer shield, Xie Heping said with a little heartache, Liu Yijiu.

Liu Yijiu was too haggard all this time.

In order to Fifth Axis, he directly eat and live in the workshop, even Li Rui refused to ask him to go back to rest.

How did he know that Liu Yijiu was afraid to go back to pay the public pay?Obviously Li Rui almost fainted every time. After a while, it was like taking Dali Jingang pills and resurrected with full blood in minutes. Although Director Liu had good physical strength, he could not withstand physical and mental exhaustion during the day.

"For manufacturing, our pursuit will never stop. The Japanese can manufacture it, why can't we?" Yu Jianguo is now doing it with pride.

Cao Zhijiang was on the side, pouting his lips directly.

"Our industrial base is incomparable." Liu Yijiu shook his head and sighed.

With the careful assembly of many skilled workers over fifty years of age, the first domestic five-axis CNC machining center (that can be used) was quickly assembled.

A five-axis machining center that is nearly two meters high, two meters wide, and about three meters long, and is not much different from an ordinary gantry milling machine.

Since the five-axis machining center studied is used for high-precision machining of relatively large parts, mainly the machining of turbofan engine impellers, blades and other parts, all directly chose a relatively simple gantry structure.

In the x-axis direction, due to the relatively long stroke, the column with the main shaft movement is directly adopted, while 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 a vertical downward main shaft, and the main shaft can directly swing left and right...

"This is the simplest. For the sake of accuracy, we gave up the rigidity and processing efficiency of the machine tool. If we still can't succeed, we can only go home and take the children..."

"Okay, no, don't think about how easy it is to go home with your children! There are so many things here!" Xie Heping gave Yu Jianguo a blank eye.

"Old Cao, there is no problem with your CNC system, right?" Cao Zhijiang is responsible for the design of the CNC system, which is his strong point.Especially the joining of Professor Baliguo who participated in the Dawning Project has made the Ninth Academy even stronger in computer.

Numerically controlled machine tools, in popular terms, are machine tools controlled by computers.

The numerical control system, the core of the machine tool, ranks first.

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

"Then start running, don't worry, take your time, this machine tool is the simplest five-axis." Liu Yijiu said he was not nervous, it was fake.

In order to improve the manufacturing technology of CNC machine tools, he directly abandoned the plan of adding a plc-controlled rotary table to a three-axis machining center to form a simple four-axis machining center.This kind of plan was a rubbish plan that was thrown out by foreign countries to prevent China from making progress in CNC machining centers.

Simple four-axis, although it can achieve some four-axis functions, it can only be used for small parts manufacturing.

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

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

From no basis at all, to one of the best operators of CNC machining centers, she only spent six years.

Originally, the test can be operated by anyone. If there is a failure, you only need to press the red emergency stop button on the control cabinet. However, the test sometimes requires the operator’s experience. When should the stop be stopped? Is very critical.

"Let's get started!" Liu Yijiu and others stepped back a few steps. For safety's sake, the machine tool's spindle was not equipped with a tool holder.

Jia Ling took a deep breath and calmed herself down, which was even more nervous than when she opened the processing center for the first time.

Because this is a five axis!

The first five-axle made in the Republic of China.

Although, it seems that this thing is ugly, without the slightest feeling of domineering, and it does not even look like a high-tech product.

After checking the running-in program, Jia Ling checked some machine monitoring parameters, adjusted the feed speed directly to 5%, the spindle speed multiplier to zero, and then stretched out the green fingers on the control cabinet. There was a light press on the little green button.

Following Jia Ling's movements, the hearts of Liu Yijiu and others suddenly became tense.

With Jia Ling's actions, the original stationary machine tool, the spindle began to move slowly along the length of the x-axis.

And above the beam in the middle of the two columns, the main shaft began to move slowly along the y-axis direction. Below the main shaft, a small main shaft like a mechanical arm began to swing left and right.

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

"Speed ​​up! The feed rate is increased to 30%, and the swing speed is increased to 20%..." After Yu Jianguo had been running for more than ten minutes, Jia Ling asked Jia Ling to speed up the machine.

Soon, the whole machine tool's movable mechanism began to accelerate, but it was still not very fast.

"Up to fifty percent..."

"Wait a minute, switch to a single-axle running-in. If this goes on, too fast speed will cause problems with the column." Liu Yijiu directly stopped.

When the five-axis machining center is working, although it is a five-axis linkage, there will never be a problem of high-speed movement of the five axes during the machining process.Rather, it will come first, otherwise, it will have a very big impact on the service life of the machine tool, and at the same time, it will cause a very big safety hazard to the machine tool.

This method of testing is inherently undesirable, and problems can be drawn without problems.

Jia Ling turned the knob for adjusting the feedrate override on the control cabinet. He did not directly rotate it to the 50% position, but instead of increasing by 10%, he paused for about one minute before continuing to adjust.This is also the reason for choosing her to operate.

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

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

You must run to the limit to find the problem.

Move slowly, unless it is some big problem will be exposed.

"Huhuhu..."

The column running at full speed, the sound of friction, and the sound of wind generated by the movement are all very worrying.

However, this operation requires tens of hours for each axis.

"There is no problem with the operation, should I directly apply 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 understand as clearly as Liu Yijiu.

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

"Be safe, let's test run with the program first. Although we have completed the running-in, this can only prove that there is no problem in the movement process. The control system has always been very critical. It can only be discovered by integrating all the functions of the entire machine tool with the program. Before processing trial cutting, it is better to test first. It is now, and there is no need to rush to this point. This is just the simplest of the five-axis machining centers..." Liu Yijiu sighed.

Sometimes, in the research process, time cannot be speeded up.

Because it is impossible to save some small experiments that seem very unimportant but are very critical.

"Well, the impeller processing program of our engine has been compiled. Use this for dry running first?"

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

When you are away, these guys can be on their own. Although slower, they can develop quickly. When you are here, you have to ask yourself about everything.

This kind of 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!