Intelligent Industrial Empire

I heard Yang Bingbiao say that this lathe rail, which is more than one meter long, has actually reached level three.If they are given time, it is not that even the second level or even the first level can be achieved under the most common basic tools such as simple scrapers, files, and sandpaper and oilstone!

The more advanced the machine tool, the less there will be in this world.

In Yunfei's world, looking through the entire earth, it is estimated that there are not many metal processing machine tools with accuracy levels above two.Not only is the price of these machine tools manufactured through the oldest manual methods unacceptable, but also because there are not many super-precision machines on the earth that need to be processed by these super-precision machine tools.

The produced parts are all used to assemble with other parts. If the parts really reach accuracy above level three, during assembly, it will be difficult because the gap in the assembly is too small.Of course, it becomes more difficult to adjust the assembly gap of the system.

"Now that the machine bed has been processed, it is ready to be transferred to the assembly workshop." Yunfei saw that there were almost no traces of processing on the machine, jumping the inverted V-shaped convex part and the flat part of the guide rail. Like a mirror, it can faintly illuminate the shadow of people.

The straightness of the three-level precision guide rail is within 0.008mm, and the flatness is also within this tolerance. Of course, the parallelism will not exceed a trace.The V-groove and plane used to assemble the guide rail under the saddle mounted on the guide rail also have the same accuracy.

Yun Fei knows that at the beginning, these parts were not assembled, but were scraped separately, and then finally when the size of detection with various tools was about to come, the accuracy level was at least close to level 4. The worker will overlap the assembly positions of the two parts and grind back and forth on the guide rail with a saddle that drives the tool holder to move.

Due to the high hardness on the guide rail plane, especially when the two planes are very smooth, pushing the saddle on the machine tool guide rail back and forth to grind back and forth will not easily wear the mating plane.Therefore, it is necessary to balance the weight on the saddle, which is only tens of kilograms. Under the reuse of gravity, the two flat surfaces that rub against each other will become flatter and smoother.Of course, the counterweight added to the saddle and the gravity added to the saddle must be balanced, otherwise the flatness of the grounded mating plane will not meet the requirements at all.

On the machine tool, not only the guide rail and the saddle installed on it to drive the tool holder to move, need this to achieve the highest accuracy.The tool rest is not directly mounted on the bed saddle, but on the bed saddle there is a middle pallet for longitudinal movement with the tool rest.The bed saddle carries the tool post to move horizontally, and the middle pallet drives the tool post to move longitudinally. When the horizontal and longitudinal movements are carried out at the same time, the moving track of the tool will be an oblique line or an arc.

When the tool moves diagonally, it is used to turn the tapered surface; when the trajectory becomes an arc, the arc cutting is performed.

It is difficult for workers to move at a constant speed in two directions with manual operation, but this problem does not exist with CNC machine tools.The emergence of CNC machine tools was not originally used to produce large quantities of parts, but to process various complex movements that were difficult to achieve by manual operations.

It is also a nine-level fitter with the best technology at Jiuyi Heavy Industry, but the workshop is not a precision machining workshop, but a dust-free workshop for the final assembly of CNC machine tools that has not been opened since its completion.In fact, this dust-free workshop is not a dust-free workshop in the true sense, but the whole plant is basically sealed, except for some windows for ventilation, most of the other windows are tightly closed.

At this time, there is no large-scale central air-conditioning production in China. If a factory building of thousands of square meters is to achieve constant temperature conditions, such central air-conditioning must be customized abroad. The price is not the current Yunfei. Bearable.

In the workshop of thousands of square meters, there is a single lathe foundation equipped with the foot, bed and headstock.Under the leadership of Yang Bingbiao and Guderian, four or five class 9 fitters in their forties and fifties wearing white lab coats installed various parts into the headstock of the lathe in an orderly manner.

"Be lighter, don't use it as an ordinary lathe to assemble..." At the assembly site, Yang Bingbiao's heart was about to fall out when he saw those old furry stubborn assembling.

You know, these parts here are at least one grade higher than those of ordinary lathe parts, and some of the key parts of the main parts have even reached the level of accuracy.

None of the workers inside has assembled a lathe with such a high level of accuracy of parts, and of course, has not assembled a CNC lathe.

Yunfei originally wanted to go to other machine tool manufacturers to dig one or two nine-level fitters with CNC machine tool assembly experience, but those people were treated as treasures in their factories, and those factories would not be stupid. Your own master gave it to your competitors.I heard that Zhao Xingbang had a relationship with the director of the Northeast No. 1 Machine Tool Plant. Yunfei wanted to get one or two from the Northeast No. 1 Machine Tool Plant through Zhao Xingbang. Before he could say anything, Zhao Xingbang hung up Yunfei's call.

In the end, the director of the Northeast No. 1 Machine Tool Plant directly called and threatened Yun Fei. If Yun Fei digs out the minds of the masters of their factory again, he will do whatever it takes to get Yun Fei's hard-working engineers and various senior workers back from the Soviet Union. They were all drawn to his factory.

Yun Fei knew that the threat of that product must be taken seriously.The Northeast No. 1 Machine Tool Plant is the largest machine tool manufacturer in China. In the world of Yunfei, in that era, the annual sales of CNC machine tools approached 10 billion US dollars.Coupled with the title staring at Guozihao, and Yunfei, who is directly under the Central Machinery Department, now that even the workers are not his own, how can he challenge such a giant?

"Align the hole in the middle of the gear with the shaft. There is less than a slight gap. If it is crooked, it won't fit in. This is not an ordinary lathe. There is nothing wrong with crooking. Then you can use a copper rod to knock in... …" As the boss, Yun Fei, when Yang Bingbiao, the workshop director of the assembly workshop, personally went to the field to assemble the first CNC machine tool in his factory, he was a young boss who knew CNC machine tools better than any of them. Dispatch command.

"Xiao Yun, this is no different from an ordinary lathe except for the main shaft with an inverter installed?" When first seeing the assembly drawings, Yang Bingbiao and the others were full of doubts, but Yun Fei did not give them. Explain, they can only hold it in their hearts.

Now that the spindle of the lathe has been installed, I discovered that the gears in the spindle box of the first CNC lathe produced by Jiuyi Heavy Industries are no different from other 6140 lathes!The only difference is that a fist-large frequency converter is installed at the end of the main shaft of this lathe, which is said to be used to control the speed of this lathe.

This puzzled Yang Bingbiao and those senior assemblers from the Soviet Union. Now that the frequency converter used to control the spindle speed is installed, what else is there to install so many gear sets for?Why does the manual fork used to control the speed of the lathe still exist?

"The headstock is actually the structure of an ordinary lathe!" Yun Fei said indifferently, making everyone who assemble carefully, depressed.

"Although it is the spindle box of an ordinary lathe, there are still some subtle differences in it. You are all master craftsmen. Didn’t you find out that in the current way, the speed of the machine tool can be changed manually, and the same Infinitely variable speed can be carried out. Although there are more than 20 speed changes on the ordinary lathe, the difference between the two speeds is not too big, especially in the high gear, the difference between each gear is at least hundreds of revolutions For many materials that require relatively high linear speed, the speed of ordinary lathes cannot reach the most reasonable..." Yun Fei explained to everyone.

At the beginning of the design, the Soviet engineers thought that Yunfei, a layman, was blindly commanding. Since the inverter can be obtained, it can produce a CNC lathe that can carry out high, middle and low third gears and infinitely variable speeds. Why add On the shift fork with manual transmission.However, when a mathematical model was later established for analysis, it was discovered that a CNC lathe with a stepless speed change in three gears, compared with a CNC lathe with a stepless speed change in more than twenty gears, has no difference in speed, but has poor rigidity. It's not one and a half.

After the gear in the headstock is installed, there is only a ball screw and a stepping motor that controls the displacement of the machine tool, and the control electronics of the machine tool. Finally, it is bigger than a 20-inch TV set, but the display screen is only slapped. After the independent PLC controller is connected, the assembly of the first CNC lathe of Jiuyi Heavy Industry is complete.

Whether there is any problem in the assembly, it must be discovered during the trial processing.The machining accuracy of the machine tool needs to wait until the parts used for machining are completed before it can be reflected in the machining results.

Most of the circuit design of this machine is a CNC machine tool completed by Yunfei himself. After the electrician connects the independent PLC controller of the machine tool to the electrical box of the machine tool, the final assembly is completed.

As early as when Jiuyi Heavy Industry just started production, Yunfei mobilized 20 sets of CNC systems for lathes from Huadu CNC, as well as the supporting ball screws and stepping motors, which are the most critical CNC machine tool accessories. .He wants to use a servo motor, but the servo motor is not only difficult, the price is too expensive.A servo motor costs thousands of dollars!

Now this CNC lathe, which carries the dreams of everyone in the various workshops of Jiuyi Heavy Industry, has finally completed the final assembly.