(Add 4/20 for Driden)

"Why is this five-axis so ugly? The technology is much worse than that of Japanese ones? What's the use of making these things?" The leaders who came to visit were not optimistic about this ugly machining center.

"Chief, is the Japanese's first one so sophisticated?" Yu Jianguo immediately asked these officials with a gloomy face. "I didn't even see the processing, and the final result was not released. Is this kind of evaluation interesting? Have we never made any progress? Or we don't need to study at all, and buy it directly from the Japanese? Can we buy it if we have money?"

"What does this mean, comrade! We are just talking about the matter. Director Liu, tell me, am I wrong?" The staff of the National Defense Science and Technology Commission asked Liu Yijiu with a frown.

The others all looked like watching the fun.

The current experiments of the five-axis machining center have attracted too much attention. Although it is a relatively simple five-axis machining center, it is intended to process some important precision parts of the aviation industry. Everyone knows this.

Therefore, the five axis is so important.

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

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

That's why Liu Yijiu attaches so much importance to it.

Not only did he pay attention to it, but even the military chief departments such as the National Defense Science and Technology Commission, the Logistics Department, etc. visited their five-axis machining center that was still under test.

Liu Yijiu knew that the leaders had realized the importance of this thing and did not allow him to blackmail so many good things at the beginning. It was precisely because he had blackmailed too many good things that he had to get out the five-axis machining center as soon as possible, which could achieve the best accuracy of the Japanese, or even exceed the Japanese’s processing accuracy. After all, Japan’s current military industry is basically blank.

"The five-axis machining center is not just a machining center, but also a highly integrated technology field in computer systems, machinery manufacturing, materials, heat treatment technology, automation and other fields! The current simple five-axis machining center is the ultimate that our Ninth Academy can do now!" Liu Yijiu introduced the situation to the group above.

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

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

At the same time, the same is true for the people in the Logistics Department.

Liu Yijiu naturally knew why they looked down on him. With the Japanese five-axis in front, looking at such products, I really feel that it is a bit rubbish.

It prevented Yu Jianguo from continuing to argue with these officials who didn't know how to pretend to be, and Liu Yijiu was too lazy to introduce the parameters of the five-axis to them. Instead, he directly clamped and straightened the huge circular wax block used for trial cutting, waiting for Jia Ling, who was undergoing trial cutting, to start.

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

The contact between the guide rails and the moving parts, the rapid friction made everyone look at the five-axis machining center that had already started.

"Bang!" The pneumatic workstation started, and the tools in the tool magazine quickly changed positions in a series of "Bang" sounds. After a few seconds, the tool magazine stopped rotating. The spare tool in the tool magazine, which was perpendicular to the spindle, slowly rotated downward by 90° under the hydraulic push, becoming parallel to the spindle. The robot originally crossed the tool magazine and the spindle quickly moved downward under the push of air pressure. After reaching the set position, it paused for less than 0.2 seconds. With a "bang" sound, it rotated 90°. The slots at both ends just grabbed the tool slots of the tool magazine and the tool click on the tool on the spindle, "Bang!"

The station works again, and the handle of the tool holder in the spindle and the handle of the tool magazine are both released. The robot grabs the two handles, moves down again, and then rotates 180° again, and moves up quickly. When you hear a "bang", the tool changer directly exchanges the two tools, then releases, selects 90° in the opposite direction of the tool, and returns to the original position. The tool holder of the tool magazine is replaced with the tool originally on the spindle, and slowly rotates upward until it is perpendicular to the spindle, and then continues to adjust the tool number after starting. The next tool called in the program is quickly changed to the tool change position.

The tools on the spindle are tools installed in the tool magazine.

After all this preparation was completed, the spindle quickly moved downward, as if it fell directly from above, which made people who didn't understand worry.

The rapidly descending spindle is about 15 cm away from the wax block, and paused for a while, "buzz..." After moving into place, the spindle directly starts at high speed.

The movement speed of the spindle slows down here and slowly moves downward. The tool is facing the center of the wax block. As the tool moves downward, the track also begins to move. When the tool is about to touch the wax block, the tool 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! No other parts move..."

Hearing these words from outsiders, Liu Yijiu's mouth twitched.

There is no explanation.

The three-axis machining center and the five-axis machining center were indeed the same at the beginning.

Because of the working status of the machine tool, they have already told them why the five-axis machining center is the five-axis machining center.

The rotating workbench in the middle of the spindle starts to rotate directly.

"Shits..." The air nozzle began to spray high-pressure air outward to prevent debris from sticking to the tool.

The tool contacts the wax mold, and countless debris are cut off from the wax block by the high-speed rotating tool, and then the high-pressure air flow sprayed from the nozzle is blown to the edge of the workbench.

Soon, the wax block rotated at high speed of the spindle and the slow rotation of the workbench to process the outer circle.

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

After the outer circle of the first cutter was completed, the spindle began to move upwards and reached the tool change position. With the joint efforts of the robot, hydraulic workstation, pneumatic workstation and other mechanisms, a more slender alloy milling cutter was replaced.

Move it down again, this time it is different. The small spindle head on the spindle begins to rotate, forming an angle with the workbench countertop.

"Impeller processing mainly involves processing spiral curved surfaces. This is the fifth axis..." Yu Jianguo said with a proud look on his face.

Under the control of the program, the originally round wax block edges began to be formed under high-speed rotating milling cutter processing. The rotating workbench on the workbench moved slightly back and forth, causing the curved blades to appear.

"In fact, horizontal five-axis machining centers are the most ideal. However, there are still some technical problems that have not been solved, so we can only choose this solution." After seeing the functions shown in the test process of the domestic five-axis machining center, we finally learned that the machining accuracy can reach 0.02mm and the indexing accuracy can reach 0.03°, these guys naturally began to admire them.

The only thing is that the appearance is a bit ugly, it looks too simple, and it doesn't feel like science fiction at all.

Liu Yijiu ignored them and sent them away, calling the entire team to have a meeting.

"Heavy-duty horizontal five-axis are what we should choose. In addition, large verticals and large propellers are also used to process..."

"So, we cannot just meet this point. The technology of our CNC machining center is still very far. This requires the efforts of all comrades. Our first goal now is to increase the rigidity of the machine tool. Although the spindle speeds obtained from Japan can reach 12,000 rpm, it is not enough at all! Of course, tool materials, heat treatment processes, etc. must be improved..."

Everyone else nodded and said yes.

"I think the head above has a bad impression of the appearance of our equipment. Even if it is to be mass-produced, some design improvements are needed. We cannot consider whether the appearance is good or not because the function meets the design requirements. At least, it must look a bit high-tech! After all, most of our domestic leaders do not understand these..." Liu Yijiu asked to change some appearance designs.

This is something that can't be done.

Their five-axis is really ugly. If it weren't for the control cabinet next to it, it wouldn't look much different from ordinary milling machines when it was not processed.

This is the five axis!

The most advanced manufacturing equipment can be produced by a very small number of countries.

Just like many so-called leadership experts in the superior department, when they see this thing, they don’t feel any science fiction at all, they naturally look down on it a little.

Their preconceived ideas made them think that these machine tools were not good, and they didn't have the patience to listen to the detailed introduction. The leaders who could make decisions were very busy.

Therefore, Liu Yijiu needs to make these five-axis machining centers that are already considered very advanced in performance.

"And, after that, our military has more advanced equipment, and these five-axis machining centers are sold to civilian systems. There is no such thing as a show. Who would think that our machining center is powerful?"

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

They have always pursued pragmatism.
Chapter completed!