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These CNC machining centers that are running, because they are going to be tested, are processing soft materials that are easier to cut and will not fly everywhere.The processing on the machine tool is generally some wooden molds that do not require high processing accuracy.

These are some molds for sand casting made by the woodworkers in the smelting workshop. The tolerance units are originally measured in millimeters, but during the test, the supervisors of the test workshop requested that the tolerance be within 004mm do it.

Only by making precise products can the actual machining accuracy of the machine tool be detected, and the machine tool be improved or adjusted based on the data obtained after these processes.Continuously develop in the direction of higher precision.

"How many of those in the corner are also processing centers?" For the processing centers in front of them surrounded by fine protective nets, a group of people from the reference group couldn't walk in and watch them, and felt very unsatisfactory.

However, in the corner of this workshop, there is a space of more than [-] square meters isolated by glass. There are a few people in white coats who don't know whether they are workers or researchers. The CNC machining centers and the CNC milling machines in the assembly workshop of Jiuyi Heavy Industry are very similar to the CNC milling machines with guards.

"Over there is the machining center where the heavy-duty cutting test is being carried out!" Yun Fei originally didn't plan to bring these people into the constant temperature workshop separated by glass.

For the design of a CNC machine tool, many types of tests must be carried out, and there are many types of cutting tests alone.

The heavy load cutting test is mainly used to test the rigidity of the machine tool.

In the Chinese CNC machining industry in the 90s, it is estimated that not many companies are willing to use CNC machining centers that cost hundreds of thousands or even millions of dollars for rough machining. Even Xinkaixing, the products processed by those machining centers, Many of them remove most of the margin that needs to be processed on ordinary milling machines or other equipment, leaving only a small margin for rough machining on the machining center. [

All this is because it is too difficult for China to obtain CNC machine tools!

most of the time.Especially for the processing of some three-dimensional curved surfaces, the margin left by rough machining with ordinary equipment is uneven, which is likely to cause the tool to be damaged during the cutting process.You know, most of the alloy cutting tools used in China's CNC machine tools in this era are imported!A blade costs hundreds of dollars, and an alloy knife costs hundreds of dollars!

After the assembly plants established by Taiwan's CNC machine tool factory in the mainland successively provided machining centers to the Chinese market, the number of domestic machining centers continued to increase. Some relatively large companies had to recruit enough skilled workers because of the law. Gritting his teeth, he used some machining centers with poor precision for rough machining of parts.Only then will they find out.In fact, CNC machine tools, like ordinary machine tools, have high requirements for rigidity.

Yunfei is a person who pursues perfection.

He deeply understands that in order to remain invincible in the fiercely competitive Chinese CNC machine tool market in the future, it is necessary to ensure the quality of these delicate CNC machine tools.

After entering the 21st century, the machining industry, especially the mold processing industry, is mostly produced in small batches of single pieces.This makes it impossible for these products to subdivide the process into many steps like the processing of large batches of parts.

When processing complex single-piece and small-batch parts, the processing of turning, milling, clamping and even lettering can be directly performed on the machining center to be more efficient and cost-effective.If the rigidity of the CNC machine tool is too poor.It takes about the same time as ordinary machine tools to rough out product parts, so what is the use of buying these machining centers at a high price?Once the processing time is too long, the processing cost of products produced in a small batch in a single room may directly increase exponentially.

"Can you let us go in and take a look?" The same guy with two gold stars on his shoulders was very curious why there was an area separated by glass in the workshop.

From what they know.CNC machine tools do not need any dust workshop or constant temperature workshop.

Yun Fei really wanted to refuse their request, but seeing the old man's longing face, he could only nod and lead everyone towards the door of the glass house.

when the door is about to open.After Sun Lin ordered a female worker next to him to go to the warehouse to fetch dozens of pairs of earplugs and handed them to everyone, he signaled everyone to put them on before opening the glass door.

As soon as the door was opened, all kinds of harsh sounds that were closed inside came out. If you don't wear earplugs, you may even hear your teeth sour.Fortunately, the roof of the workshop was not closed, otherwise, the noise in the room would be even louder.

"These machining centers here can be regarded as complete finished products. But these are only finished products we use for testing. The equipment here is used for heavy-duty cutting tests. When the test is over, this The equipment inside is basically scrapped..." Sun Lin explained to everyone in a roaring voice, but he didn't bother to explain whether these people could understand what heavy-duty cutting was.

These things are too basic, and those who don't understand them are not very useful even if they know them.Those who need to know can understand without his explanation.

"What is the heavy load cutting test, you can go up and take a look to understand." Yun Fei saw many people who were very curious, and those who were not curious also looked confused. It's too difficult to explain to people who don't understand...[

Most of the people in the glass room are "operation" workers transferred from the production workers in Jiuyi Heavy Industry's machining workshop, and the researchers just collect data at intervals.After all, this test is only to verify some designs of the machine tool, especially the service life of the machine tool spindle and transmission components during heavy-duty processing.

"Old Deng, the so-called heavy load test means that the cutting process of these machine tools adopts the maximum cutting depth, the fastest cutting speed and the highest speed that the machine tool spindle can achieve when the machine tool is designed. Sometimes, the test is carried out. The main shaft may be scrapped in half an hour." Yun Fei explained loudly to the old man.

The room is very noisy, especially the noise generated by the machining center during high-speed cutting with a large amount of cutting tool. Ordinary people can't bear it at all. When the tool on the spindle of the CNC machine tool is running at high speed, it will Produces a variety of very rigid sounds.Moreover, the sound will vary greatly depending on the depth of the knife and the material, but no matter what kind of sound it is, it will make people feel uncomfortable.

Visiting this room is very fast. Even with earplugs, the sound inside can still be transmitted to people's ears.

"It's a prodigal! Dozens of millions of devices are used for such a thing!" The lieutenant general said to Yun Fei with gritted teeth as soon as he took off his earplugs.

What a waste!

The country purchases these equipments every year and spends a lot of foreign exchange reserves. Fortunately, the prodigal young boss of Jiuyi Heavy Industry can scrap several or even dozens of spindles every day!

How much is a spindle?

fifty thousand!

In this era when the per capita salary is less than [-] yuan, Jiuyi Heavy Industry is wasting hundreds of thousands of yuan a day.

But how did he know that if he did this every day, even the world's richest man would not be able to afford to be hurt.

In the workshop of Jiuyi Heavy Industry, the total working time in a month will not exceed 20 hours, and the total value of the scrapped spindles will not exceed [-] per month.What's more, these are all produced by Jiuyi Heavy Industry itself. Except for materials, other costs can be ignored at all. Otherwise, Jiuyi Heavy Industry's monthly profits of tens of millions are not enough to fill the teeth of this laboratory.

Will Yunfei tell them that the cost of the precision spindle produced by Jiuyi Heavy Industry is only 8000 yuan?

Will Sun Lin tell them?

meeting.

It's a pity that Sun Lin doesn't care about production, procurement, or finance.The only thing he knew was that to produce such a spindle, more than 40 processes were required, and the heat treatment alone had to be carried out six times!

"Xiao Cao, don't scold others for being a prodigal. I said at the beginning that when you come to visit, just keep your mouth shut and watch. See more, listen more, and talk less! Xiaoyun, I am also very curious. , why would you spend such a large cost on such an experiment that seems to have no other effect except prodigal?" Although he reprimanded the lieutenant general, the old man was also very curious about this.

"Old Deng, it's like this. Conducting such an experiment is not only to test the performance of the machine tool, but also to verify our design, processing technology and even materials. These CNC machine tools will have a very long service life after leaving the factory. long, and the spindle is the core mechanical component of a CNC machine tool. A machining center weighs less than one percent of the entire machine tool, but its price accounts for one eighth of the entire machine tool. If it is always prone to problems, we The word-of-mouth will become very bad in front of customers. Who will dare to buy our products in the future?" Yun Fei explained to the old man why such an experiment was carried out.

"At the same time, only through such experiments can the spindle we design be able to withstand long-term higher-speed operation, so that we can continuously increase the spindle speed of our products and develop high-speed machines. The speed of foreign machining centers has already It can reach [-] revolutions, while ours has just broken through [-]!"

Yun Fei's words made the old man nod in satisfaction.

Those who engage in research should not be too petty.The more investment, the greater the return, especially for high-tech industries. (to be continued

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