"Bang!" "Smack!" "Wow!"

"The last knife ......" all the test machines around this test machine without a shell passport were staring closely, waiting for the last knife change action after reversing the first circle.

The tool magazine is turning a circle, there is no problem, now the reverse circle is about to be completed, as long as the tool can be successfully completed under the clamping of the manipulator, it means that the cumulative error of the tool magazine in the rotation is not very large.

More than two months of theoretical design, more than half a month of manufacturing, all the work, are waiting for this tool change.

"Switch to manual mode...... When the No. 1 tool stopped at the tool change position again, and was about to change from a horizontal state to a vertical state, Yun Fei said to Lin Yajun, who was nervously staring at the manipulator that was about to move.

Hearing Yun Fei's words, Lin Yajun hurriedly pressed the pause button, and pressed the pause button and start button respectively on the index finger and middle finger of his right hand. Press the start button once, then press the pause button again, slowly touching the button on the control panel with two fingers.

The operation of the CNC machine tool cannot be directly converted from automatic control to manual control during the operation of the program. The only way to achieve manual control is to constantly switch between the pause button and the start button. However, to be able to play like this, a group of experienced masters are used when trying to cut and process when debugging the program. Theoretically, this operation is illegal and does not correspond to regulations within the industry. It is easy to cause damage to some sensitive control elements of the CNC system. If the frequency of pause and start is too high, it is even possible to burn the control chip of the CNC system!

However, in the processing process of some complex products, it is easy to encounter some problems, if you stop the program, wait until the problem is solved, and start processing again, you need to start from scratch. developed later, in order to solve such problems. Some of the more advanced systems have the function of skipping the execution, but at present, the dragon CNC system transformed by Jiuyi Heavy Industry has not yet had such a function.

The tool magazine test, especially the initial test, should be divided into many steps. All the people did not have that kind of patience, as soon as they came up, they first set up a knife magazine to run 100 times, and carried out 1,200 tool change tests.

Now when this makes everyone nervous, it can only use this kind of means that is relatively illegal for the CNC system.

The sound of the "bang......" cylinder pushing the handle made everyone's hearts rise to their throats.

"Bang!" The manipulator just moved. The handle of the knife fell from the inside of the guide sleeve of the knife magazine. Lin Yajun, who had just breathed a sigh of relief, said, "Smack!" The ground slapped the red dazzling "emergency stop" knob.

"Alas......" A sigh sounded.

Everyone's faces darkened.

"Old Sun, it's okay, isn't this the first experiment? How can you succeed in the first place? If this is the case, our country would have come up with CNC machine tools with more than three axes. Seeing that Sun Lin seemed to have been drained of his spirit, Yun Fei comforted with a calm face.

Yun Fei has long been mentally prepared for such a thing as falling off the knife.

The problem of the tool magazine of the machining center is a difficult point. Otherwise. China's domestic CNC machine tools can not be close to the level of foreign technology on the CNC milling machine, and in the selection of the machining center tool magazine, it can only use the hat type tool magazine with the least technical difficulty. It was not until later, with the accumulation of experience. Only then did it gradually develop towards the disc type random tool magazine and the chain tool magazine with higher technical content and more tools.

"We have not carried out the manufacture of the test machine because of the problem of research funds, but the theoretical research has been carried out for several years, and now the second round of tool change experiments has just been carried out. There was a knife ......," Sun Lin said with a lonely face.

He is very confident in the theoretical design of his team, but now he has been hit by this drop.

"When I tried each part separately in the previous section, there were no problems. Especially now the most undesirable problem of knife dropping, ask why this assembly, arise? How many problems are left unexposed? Situ Heyun was also very depressed.

From the current point of view, the biggest problem now is the problem of control, the cam mechanism of the control tool magazine is not accurate, and the cumulative error is too large, so that the manipulator does not grasp the tool handle in the fixed position, so that the tool handle falls off as soon as it moves.

"Kobayashi, put on the No. 1 knife, continue to test it, and record the data each time. Then let's analyze together where the problem is. "Now that the problem has appeared, it is useless to dwell on it, it is better to continue to test it, once the knife is dropped, there is no way to know what defects there are in this set of knife magazines, and how many defects there are.

The test was carried out again, and the phenomenon of knife dropping became more and more frequent.

After reaching the most, the tool handle is full of collision marks, the manipulator is also twisted and deformed, and the cone surface on the spindle cone hole of the machine tool is also potholed, and the test can only be terminated.

"Mr. Sun, why don't you help ask the Capital No. 1 Machinery Factory if it is interested in the disc tool magazine, and let's work together to get one?"

After the summary meeting of the first test, Yun Fei looked at Sun Lin and Situ Heyun, who seemed to have been drained of their spirits, and was depressed. Is this old thing still from the mechanical institute? This time the test failed, with such a dejected expression, where are those scientific spirits who are not afraid of failure!

After the test stopped, all links were checked countless times, and the summary meeting was held several times, whether it was modeling or sub-testing, it was never possible to find out the reason for the knife drop. Even, Sun Lin personally measured the position of each tool change, and there was no difference from the theoretical design.

In desperation, Yun Fei could only propose to let Sun Lin's team cooperate with the Capital No. 1 Machine Tool Factory. Maybe the engineers in the Capital No. 1 Machine Tool Factory can help find out where these problems are?

At the beginning of the research of the machining center of Jiuyi Heavy Industry, Sun Lin proposed to cooperate with the Capital No. 1 Machinery Factory on this project, so that not only can the cost be shared, but also can make use of the rich experience of the Capital No. 1 Machine in producing milling machines for decades. In the end, it was rejected by the first machine tool factory in the capital.

With the launch of Jiuyi Heavy Industry's CNC milling machine, Capital No. 1 Machine has also launched its own CNC milling machine. However, for their CNC milling machine, the Z-axis movement is that the entire worktable moves up and down, not the spindle up and down. Moreover, the capital machine did not use the dragon CNC system produced by the number of flowers, but launched their own capital CNC system with countless traces of devil FANUC, so that they clearly stated their position.

A machine in the capital, a large state-owned enterprise with tens of thousands of people, more than half of the milling machines in China's factories are produced by them, how can it be seen as a small factory that has been built for a year? They believe that the self-developed things advertised by Jiuyi Heavy Industry are some backward technologies purchased by Jiuyi Heavy Industry from abroad. Not qualified to collaborate with them in scientific research.

"No way!" The two veterans didn't think about it, and rejected Yun Fei's proposal in unison.

The refusal of the capital's first machine, the most faceless are these two old goods.

They were the ones who contacted them in the first place.

Now, under the insistence of Yun Fei, Jiuyi Heavy Industry has taken a different route from the capital to tackle key technical problems. In the research of the machining center, the capital and the use of a fixed tool magazine, and the use of 91 heavy industry is a random tool magazine, if the two in the current cooperation, it is tantamount to 91 heavy industry spent several months of energy, millions of funds research results handed over.

How can two old guys who began to lose face by the capital's plane do such a thing?

"If we don't cooperate, we won't be able to carry out this experiment...... Several factories in Taiwan have begun to discuss with some local governments in China about building factories on the mainland, and it is estimated that their mainland factories will be established by May or June next year at the latest......," Yun Fei said to the two academicians with a tangled face.

Many of Taiwan's CNC machine tool manufacturers have now begun public relations with the mainland government. CNC machine tool technology is the domestic urgently needed technology, the whole country is almost still a blank, if they failed to seize the market before their machine tools because of less import intermediary costs after a large number of influxes into the domestic market, unless the CNC machining center produced by Jiuyi Heavy Industry can be higher than those Taiwan-funded enterprises with higher precision, lower price, otherwise, there is really not much way out.

"Give me another three months, no, two months, and we'll be able to solve these problems!" Situ Heyun said eagerly to Yun Fei.

He is worried that when Yun Fei is in a hurry to seize the market, he will reduce the research funds for CNC machine tools, and set his sights on the introduction of technology in those countries in Europe that are in a sluggish economy.

If Yun Fei really did that, they would no longer be able to raise their heads in front of the group of grandsons in the capital.

Although the CNC milling machine produced by the capital machine has a variety of defects and the accuracy is not high, it is really like what they say, they are all independently developed! All the techniques are domestic! Even if the CNC system has countless traces of the devil system, but people are learning from it! is also domestic, at least, the devil didn't sell tricks to them!

Jiuyi heavy industry in CNC lathe, CNC milling machine, are to take the road of independent research and development, this let the two of them see hope, the country finally has a resistance to the CNC machine tool industry independent innovation, independent research and development of the banner of machine tool manufacturers, if Yun Fei turned to seek foreign CNC machine tool technology, the national flag, who to resist?

"I don't need three months, I don't need two months, you give me three days!" Sun Lin suddenly raised his head, smiled at Yun Fei and said, after finishing speaking, he pulled Situ Heyun out of the conference room of the Technical Department.

"......" Yun Fei was stunned, this old thing, the reaction before and after, the gap is too big...... (To be continued......)