Chapter 164 Five-axis machining center
Huating Second Water Pump Factory.
The name of the factory has not been changed yet, but next to this brand, a large and shiny brand has been added, with the characters Mingzhou Shipbuilding Industry Group written on it. This brand-new brand looks so dazzling that it makes people laugh. The brand of the water pump factory nearby looked dim.
The water pump factory is still undergoing technical rectification, so there is no one in the factory, but there are a lot of people surrounding the technical department.
Everyone is waiting to see a big rectangular thing installed on a precise base.
This thing is about the same size as a wardrobe. It also has two doors on the front. It is made of transparent material. You can see the vertical columns and horizontal clamps and other devices inside. Next to the door, it says "Haihe No. 1 Machine Tool Factory" Next to it are the words "five-axis linkage CNC machining center", and next to it is a line of small words: "Teaching Experiment Prototype".
Beside this thing, there are many cables, some of which are connected to the input three-phase power, and some of which are connected to a computer nearby.
Director Zhang Guangrong and deputy director Wang Jinbao were in the innermost part of the crowd, watching several technicians debugging the machines. They came from Haihe No. 1 Machine Tool Factory, and the words "No. 1 Machine Tool Factory" were printed on the back of their work clothes. .
“This thing requires a computer to operate. We have only heard of it before, but we have seen it this time.” There was a lot of discussion among the crowd.
“Of course, can a CNC machine tool be used without a computer? This thing is amazing. You can put the blank in and process the impeller directly without changing the fixture. The accuracy is very high.”
“Really? So magical?”
“Then we don’t know how to operate it!”
“Yes, that’s right, we don’t know how to operate it, how can we use it in the future?”
“Experts from other manufacturers have written the program for us, so there is no need to touch it. From now on, we only need to press a few buttons to turn on and off the machine. Do you still want to write a program? In the next life!”
Everyone was waiting in the discussion. One hour, two hours...five hours passed. Finally, the person operating the keyboard finally stopped his fingers. He had finished typing the last line of code. This is because they have already received the design drawings of the parts and have been designing the program all the way. Now they are just typing in. If they start from scratch, it will take ten days and a half.
“Okay, it’s almost done, put a piece of blank in and try it!”
“Luo Gong, are you ready?” Zhang Guangrong was overjoyed.
“Luo Gong, do you want to eat something first?”
"No, let's take a look at the processing effect first." Luo Wenzhong, a senior engineer at Haihe First Machine Tool Factory, said. He pushed up his glasses. After several hours of programming, he was still exhausted. But now, he is also looking forward to seeing the final results.
“Quick, put the blank in! Forget it, I’ll do it myself.” Wang Jinbao shouted. He has been operating machine tools in the factory for decades, and now he is in the most excited mood.
A shiny blank was put in, clamped firmly on the clamps, then the hatch was closed and the machine started.
Through the transparent hatch, you can see a magical scene inside: the workpiece is moving, and the turning tool is also moving, just like the turning tool flying on the workpiece, and the iron filings being turned out are connected into a line, bending. Fold it into a beautiful shape.
"Our Haihe No. 1 Machinery Factory is very capable and can already produce five-axis machining centers. With this machine, we can process the impellers of water jet propellers. Now, this kind of part is all we need!" Zhang Guangrong said very much excited.
"Yes, we can develop equipment embargoed in Batumi, it's so powerful!" Wang Jinbao also said: "The Toshiba crisis in the 1980s was because Toshiba sold this high-precision processing equipment to old Maozi, let Lao Maozi process an advanced propeller."
Luo Wenzhong smiled and pushed up his glasses: "Our country is also aware of its shortcomings in this area. As the largest machine tool factory in the country, of course our factory must overcome these technical difficulties. Since the 1980s, we have been in Developed our own five-axis linkage machining center.”
In the 1980s, the motherland and the West still had friendly relations, so seven or eight five-axis machining centers were obtained from the West.
Of course, these are for civilian purposes and must even be supervised by manufacturers and are not allowed to be used for military purposes. Later, something happened, relations with the West were interrupted, and the supervisors of these machine tools also left.
How to deal with these machines has become a big problem. The whole set is from abroad. Even if a screw is broken, it has to be imported from abroad. The supervisors of Western machine tool factories also want to let their machine tools and equipment go away. paralysis.
Some people suggested that these machine tools should be sealed with nitrogen to avoid damage. However, the No. 1 Machinery Factory took advantage of this opportunity to map and imitate Western CNC machine tools!
They wrote a petition for war, and their leader went to the capital to express his determination. After many petitions, the superiors finally made up their mind and handed one of them over to them.
Two years have passed. They overcame various difficulties and copied a prototype. At this time, Huating No. 2 Water Pump Factory came to buy it! Therefore, they were very excited and sent over the first prototype, and then sent elite soldiers and generals to come here for installation and debugging.
Foreigners are not taught how to program the machines when they sell them. If they want to produce parts, they have to hire foreigners, which costs extra money. They are different, full door-to-door service.
If it is an advanced model, it is already very convenient to directly input the CAD design drawing of the part, and the machine can automatically program and then process the part. But this is not possible now. The machine they copied was imported from abroad in the 1980s. , the imported machine is a model from the 1970s. If you want to process a part, you have to write the code manually one by one.
At this time, looking at the scene of processing inside the machine, Luo Wenzhong also felt very proud. This is the first domestic five-axis machining center. Although it is still an experimental prototype and there are still many shortcomings, as long as there is a factory After using it, they will continue to follow up and improve, and eventually they will reach world-class levels.
"It will take several hours to process. Should we go have something to eat first?" Zhang Guangrong asked Luo Wenzhong.
Luo Wenzhong nodded, and just as he was about to leave with his technicians, suddenly, a crisp sound appeared from the machine, and then, there was a thud.
Luo Wenzhong's expression changed, he quickly stepped forward and turned off the switch.
The fixture inside rotates slowly and finally stops. When it stops completely, you open the transparent door and you can see that there is gradually an impeller-like workpiece inside, and one of the blades has been broken!
Everyone’s face looked ugly.
"It may be that the blank is defective, or there may be an error in the programming. We need to try again." Luo Wenzhong carefully checked the inside of the machining center. The broken blade flew out at high speed and hit the hard protective cover. No harm occurred. ACCIDENT.
Now, we can only try again!
The blank was put in again, and everyone moved away from each other to avoid danger. Wang Jinbao personally stood on the side of the cabinet. In case of another accident, he would quickly shut down the machine.
Snapped!
Luo Wenzhong’s face turned pale, there was a bug in the program!
The food, which had already cooled down, was brought to the machine tool processing workshop. A few people took a few bites and continued to study the program.
One day, two days, three days, three whole days passed, and they could not find where the problem was with the program.
On the fourth day, when everyone was looking for the reason with red eyes, a voice sounded outside.
“Firstly, you are not afraid of hardship, and secondly, you are not afraid of tiredness. Your spirit deserves encouragement.”
“Mr. Qin?”
“Mr. Qin is here!”
Everyone stepped out of the way and allowed Qin Tao to come in. Qin Tao looked at the tortured technicians in front of the console and said, "This is the consequence of using other people's systems! We must have our own CNC machine tool control system, otherwise it will be controlled by others."
"What do you mean?" Luo Wenzhong asked strangely. After a few days, Luo Wenzhong's head began to swell and hurt so much that he almost lost the ability to think.
“Have you found the problem of writing your own program?” Qin Tao asked.
Luo Wenzhong shook his head: "No. We have checked repeatedly and there should be no problem. However, during the processing, accidents will occur and the processed parts will be completely scrapped."
“Have you never thought that it’s not your own problem, but the control system of the CNC machine tool?”
CNC machine tools use computers to control the movement of machine tools. They require both hardware and software.
Their Haihe No. 1 Machine Tool Factory is engaged in hardware. They studied hard and copied it carefully to create this prototype. However, the control system inside could not be developed by themselves, so they directly used the control system of the imitation. The system has been transplanted.
The domestically developed CNC machine tool control system was developed by the Shenyang Institute of Computing Technology. The first complete system, Blue Sky One, would not appear until 1992. Of course, this system is still very primitive. The significance is to break the foreign technology monopoly and solve the problem of domestic CNC machine tools from scratch.
After that, they continued to work hard, and it was not until 1997 that the Lantian-3210 control system developed became truly practical.
Using the Blue Sky No. 1 system, Haihe's machine tool factory developed the XH715GY five-axis linkage high-end impeller machining center with all independent intellectual property rights. The time was also in 1992. However, before that, they already had imitation products, but It is a control system for transplanting imitation objects. (The Hero of East China is not a satellite, it actually already exists. Of course, it’s of such quality...)
There will be problems if we use imitation foreign control systems.
“You mean, foreigners have tricked us?” Luo Wenzhong finally came to his senses.
"Since it's not our fault, it must be the fault of the control system." Qin Tao said: "Although foreigners sold the CNC machine tools to us, they still kept a hand. We have to spend money on any parts we want to process. Pay them a high price to write the program, so that they can also prevent us from using these CNC machine tools to produce special parts. Their control system has special settings. When our program reaches the 800th line, it will Control the turning tool to move in the opposite direction."
“What?” Everyone present was shocked. Are foreigners too bad?
When they wrote the program themselves, they knew about this reserved problem, so they wrote it backwards when writing the program. They didn't know it, and this caused problems!
“Only line 800?”
"There are also lines 1,600 and 2,400. As long as it is an integral multiple of eight hundred, it will happen once."
"Mr. Qin, how did you know?" Luo Wenzhong was extremely surprised. During processing, it was indeed the code execution error on the 800th line, but they didn't know where the error was. Now, after Qin Tao said this, they understood , but also more confused.
They are probably the best people in the machine tool industry. They have specializations. Qin Tao knows shipbuilding, but not necessarily machine tools, and he knows so much.
How did Qin Tao know? Of course it was his experience in his previous life. Although he was a naval architect, he also had a wide range of interests. When he saw an old CNC machine tool that had been gathering dust for a long time in the diesel engine factory affiliated to the shipyard, he became interested. Then, I heard the angry memories of machine tool engineers.
At first they wanted to use this imported CNC machine tool to process parts, but the program they wrote themselves was not working. The machine tool had been idle for 20 years, and domestic CNC machine tools were also used. Later, someone began to wonder about the problem with this CNC machine tool, and finally discovered that the control program had been tampered with!
So now, Qin Tao received a report from the water pump factory that there was a problem with the purchased CNC machine tool, and he thought that this might be the reason.
Now, of course he won't say it.
"I found it over there, Lao Maozi." Qin Tao directly put the excuse on Lao Maozi: "I went there to investigate, Lao Maozi said it."
Anyway, Lao Maozi also has a five-axis CNC milling machine, which is used to process propellers. The volume is many times larger than this. Although the West has exported several five-axis linkage CNC equipment to China, it is still very vigilant. It only exports this small type. It is okay to process a waterjet propeller impeller. If it is to process propellers for warships and submarines with a diameter of several meters, It simply cannot be achieved.
"Let's try it." Luo Wenzhong said: "Change the corresponding line of code and let the turning tool move in reverse."
“Reverse action, what if there is danger?” a technician said.
"What danger are we afraid of now? Let's treat a dead horse as a living horse doctor." Luo Wenzhong said: "We must take this risk."
The CNC machine tool started to run again. Everyone held their breath. Several failures made them afraid of hearing something abnormal inside. Time passed by little by little, but it was still very stable inside.
The 800th line of code has been executed!
It's still running inside, and the turning tool is flying back and forth on the workpiece, like dancing. Finally, the program execution comes to the end.
With excitement, Wang Jinbao walked over and opened the transparent door. Inside, the shining metallic impeller was so beautiful!
“Success, success!” Everyone cheered.
“Don’t get too happy yet, let’s test it to see if the accuracy is up to standard.” Qin Tao poured cold water on everyone.
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(End of this chapter)