(greatly increased 4/20 for Driden)

"Why is this five-axis so ugly? The technology is much worse than the Japanese one, right? What is the use of these things being made? "The leaders who came to visit were not optimistic about this ugly machining center.

"Chief, the first Japanese unit, is it also so precise?" Yu Jianguo immediately asked these officials with a gloomy face. "I haven't even seen the processing, and the final result hasn't come out, so is it interesting to comment like this? Have we never progressed? Or do you not need to study at all and buy directly from the Japanese? If you have money, can you buy it? ”

"What does this mean, comrade! We're just talking about things. Director Liu, tell me, am I wrong? The personnel of the Commission of Science, Technology and Industry for National Defense frowned and asked Liu Yijiu.

The rest of the people all had a lively look on their faces.

The test of the five-axis machining center has attracted too much attention, although it is a relatively simple five-axis machining center, but it is for the processing of some important precision parts of the aviation industry, which everyone knows.

That's why the five axes are so important.

What's more, as long as those who know know it, the five-axis machining center is the only means to solve the processing of impellers, blades, marine propellers, heavy-duty generator rotors, steam turbine rotors, large diesel engine crankshafts, etc.

Although the current machining center can not add too large parts, and it is also a vertical light machining center, or the woodworking machinery is better, the rigidity is poor, but the machining accuracy is relatively high, which is a new starting point for the development of the five-axis machining center of the Republic.

So. Liu Yijiu attaches so much importance to it.

Not only did he attach great importance to it, but even the military departments such as the Commission of Science, Technology and Industry for National Defense and the Logistics Department came to visit their five-axis machining center, which was still being tested.

Liu Yijiu knew that the leaders had realized the importance of this thing, and they didn't let him extort so many good things in the first place. It is precisely because of the extortion of too many good things. I had to get the five-axis machining center out as soon as possible, which could reach the best accuracy of the Japanese, or even exceed the machining accuracy of the Japanese, after all, Japan's current military industry is basically a blank.

"A five-axis machining center is not just a machining center, but also a computer system. A high degree of integration in the fields of mechanical engineering, materials, heat treatment processes, automation and a wide range of other technologies! The current humble 5-axis machining center. It is already the ultimate that our Ninth Academy can do at present! Facing the group above, Liu Yijiu introduced the situation.

The five-axis machining center provided by Japan is much better than this ugly one.

This made the people of the Commission of Science, Technology and Industry for National Defense shake their heads.

At the same time, the same goes for the people in the logistics department.

Liu Yijiu naturally knew why they couldn't take a fancy to it. With the Japanese five-axis in front. Looking at such a product again, I really feel a bit rubbish.

stopped Yu Jianguo from continuing to argue with these officials who didn't know how to pretend to understand, and Liu Yijiu didn't bother to introduce them to the parameters of the five axes, but directly aligned a huge round wax block with a diameter of more than one meter for trial cutting, and waited for Jia Ling, who was waiting for the test cutting processing, to start.

......After Jia Ling pressed the start button, under the control of the CNC machining program, the moving parts of the machine began to move rapidly.

The contact of the guide rail with the moving parts. The sound of fast-moving friction made everyone focus on the 5-axis machining center that was already in motion.

"Smack!" The pneumatic workstation is activated. After a few seconds, the tool magazine stopped rotating, and the spare tool in the tool magazine perpendicular to the spindle slowly rotated 90° downward under the hydraulic push, becoming parallel to the spindle. The manipulator that was originally horizontal between the tool magazine and the spindle, under the impetus of air pressure, quickly moved downward, paused for less than 0.2 seconds after reaching the set position, directly "snapped", rotated 90 °, and the card slots at both ends just grabbed the tool card slot of the tool magazine and the click of the tool on the spindle, "Bang! The air pressure station works again, the tool handle in the spindle and the tool handle of the tool magazine are loosened, the manipulator grasps the two tool holders, moves down again, and then rotates 180 ° again, directly moves up quickly, and then hears the sound of "pop", the tool change manipulator directly swaps the position of the two tools, and then releases, selects 90 ° in the opposite direction with the tool, and returns to the original position. The tool sleeve of the tool magazine is replaced with the tool originally on the spindle, slowly rotates upwards until it is perpendicular to the spindle, and then continues to adjust the tool number after starting, and the next tool called in the program is quickly changed to the tool change position.

The tool on the spindle is the tool with the tool magazine installed.

After all this preparation was completed, the spindle moved down quickly, as if it had fallen directly from above, which was very worrying for those who did not understand.

The fast-descending spindle was still about 15 centimeters away from the wax block, paused, and after the "buzzing ......" moved into place, the spindle directly began to start at high speed.

The movement speed of the spindle slows down directly here, slowly moving downward, the cutter is facing the center of the wax block, as the cutter moves down, the track also begins to move, and when the cutter is about to touch the wax block, the cutter is already at the edge of the wax block.

"Isn't this a five-axis machining center? It's no different from a three-axis machining center! Nothing else moved......"

Hearing this layman's words, the corners of Liu Yijiu's mouth twitched.

And there is no explanation.

In the beginning, the three-axis machining center and the five-axis machining center were indeed the same.

Because the working state of the machine tool has already told them why the five-axis is a five-axis machining center.

The rotary table in the middle of the spindle starts to rotate directly.

The "sneer......sss

The knives come into contact with the wax mold, and countless debris is cut off the wax block by the high-speed rotating knives, and then blown to the edge of the table by the high-pressure air jet from the nozzle.

Soon, the wax block is machined under the high-speed rotation of the spindle and the slow rotation of the table.

"This is the fourth axis machining!" Yu Jianguo said coldly.

After the first tool handle is completed, the spindle begins to move upward, and when it comes to the tool change position, the next more slender alloy milling cutter is replaced with the joint efforts of the manipulator, hydraulic workstation, pneumatic workstation and other mechanisms.

Moved down again, this time differently, the small spindle head above the spindle began to rotate, forming an angle with the table top.

"Impeller machining is mainly about processing spiral surfaces. This is the fifth axis......" Yu Jianguo said with a smug face.

Under the control of the program, the originally rounded edge of the wax block began to take shape under the high-speed rotation of the milling cutter, and the rotating table on the table moved back and forth slightly, so that the curved blades began to appear.

"In fact, a horizontal five-axis machining center is the most ideal. However, there are still some technical problems that have not been solved, so we can only choose this option. At the end of seeing the functions shown in the test process of the domestic five-axis machining center, I learned that the machining accuracy can reach 0.02mm and the indexing accuracy can reach 0.03°, and these guys naturally began to praise vigorously.

The only thing is that the appearance is a little too ugly, it looks too simple, and there is no sense of science fiction at all.

Liu Yijiu ignored them, and after sending them away, he called a meeting of the whole team.

"Heavy-duty horizontal five-axle is what we should choose. In addition, there are large vertical types, and there are ...... for processing large propellers.

"So, we can't just be satisfied with this, our technology in CNC machining centers, there is still a long way to go. This requires the efforts of all comrades, our first goal now is to increase the rigidity of the machine tool, although the spindle speed from Japan can reach 12,000 revolutions per minute, but it is simply not enough! Of course, the tool material, heat treatment process, etc., have to be improved......"

Everyone else nodded yes.

"I think the head of the above has a very bad impression of the appearance of our equipment, even if it is to be mass-produced, it also needs to make some design improvements, and we can no longer consider whether the appearance looks good or not because the function meets the design requirements, at least, it has to look some high-tech feeling! After all, most of our domestic leaders don't understand this...... "Liu Yijiu asked to change some of the designs.

There's no way around it.

Their five-axis is really ugly, if it weren't for the control cabinet next to it, when there is no processing, it would not look much different from ordinary milling machines.

It's a five-axis!

Only a very small number of countries can produce the most top-of-the-line manufacturing equipment.

Like many so-called leading experts in the higher departments, when they saw this thing, they didn't feel like science fiction at all, so they naturally looked down on it a little bit first.

Their preconceived notions make them think that these machine tools are not good, and they simply do not have the patience to listen to the detailed introduction, and the leaders who can make decisions are very busy.

Therefore, Liu Yijiu needs to make these five-axis machining centers, which are already very advanced, more attractive.

"And, later, when our military has more advanced equipment, these five-axis machining centers are sold to civilian systems. There is no appearance at all, who will think that our machining center is powerful? ”

"Don't worry, Director Liu, we will seriously consider this matter." Yu Jianguo assured Liu Yijiu.

They have always been pragmatic.

However, in the face of future social competition, there is no market without appearance. The products of the Red Star Electric Appliance Factory prove this.

(To be continued.) )