"It's still not as good as others."

Ma Jie took out a part that had just been turned from the lathe, and after carving it, he let out a helpless sigh.

"Magong, is the accuracy still not up to par?" Technician Yang Wenyong stood beside Ma Jie and asked in annoyance.

"It still hasn't met its original technical standards." Ma Jie said, he saw Yang Wenyong's disappointed expression, and hurriedly comforted: "However, this is already very good, and the accuracy is much stronger than that of domestic lathes." ”

"But this is not a domestic lathe." Yang Wenyong said, "I only replaced two shafts, and both shafts are exactly the same as the original shafts, but why can't the accuracy be achieved?" ”

Ma Jie patted Yang Wenyong on the shoulder and said, "Wenyong, this is the gap in technical level." It is expected that we have also replaced the domestic shaft, which is the original machine tool, and we will disassemble it ourselves and install it back, and the accuracy will drop by one level. ”

"What is the reason for this?" Yang Wenyong's persistence has risen again, and Ma Jie has to make it clear.

They were in the machine tool company's repair shop, which was filled with scrap machine tools that the state had shipped back from Germany. A group of workers are sorting out these broken goods, some of which can be repaired by replacing parts, and some of which can only be disassembled, and the parts that can still be used are removed as spare parts for other machines.

Yang Wenyong was in charge of the restoration of an old lathe that at first glance looked like a sting, but upon inspection, it was found that the damage was not serious. It had a short circuit in the electrical part that burned out a control circuit board, and the mechanical part had a re-shaft that was no longer worn.

The failure of the electrical part is not difficult, Wei Jingwen's electronics research institute is dedicated to repairing this kind of failure, an electronic engineer came over to replace a few components, and the circuit board was repaired. The two damaged shafts were a nuisance, and this part of the repair was done by Yang Wenyong.

After several years of tempering, Yang Wenyong is now the number one technician in the machine tool company, and he can afford to put down the turning, milling and grinding, and now his main direction is the assembly of machine tools. Lin Zhenhua said that machine tool companies can not only produce machine tool accessories forever, sooner or later they will develop to machine tools. After receiving the task, Yang Wenyong unloaded the lathe into eight pieces, removed the two damaged shafts, and then asked the technical department to help produce the drawing, and Yang Wenyong personally processed two new shafts. The axis accuracy requirements on the German machine tool are very high, but the equipment conditions of the machine tool company are also very good, with dozens of high-precision machine tools imported from abroad. The shaft machined by Yang Wenyong is almost the same as the original shaft.

Subsequently, Yang Wenyong spent a few days to remove rust from all the embroidered places on the machine tool, and some of the seriously corroded parts were also replaced with domestic parts.

After all the work was completed, Yang Wenyong reassembled the machine according to its original appearance, and with great interest, he used it to process a part with high precision requirements.

However, the difference in quality appeared, Yang Wenyong thought that his repair work was impeccable, but after Ma Jie measured the parts he processed, he regretfully told him: the machining accuracy of the repaired machine tool is one level different from the original level of this lathe.

"How so?" Yang Wenyong was depressed.

Ma Jie patted Yang Wenyong on the shoulder and said: "Wenyong, if you don't accept it, the precision of German equipment ranks first in the world, which is closely related to their processing level and the quality of workers." After all, our country does not have such an industrial tradition, which is called inferior technology. ”

"I don't believe it." Yang Wenyong shook his head and said, "Ma Gong, didn't you say that there are also young workers in German factories, who are about the same age as me, why can't I assemble them with the accuracy they can assemble?" ”

"This ......" Ma Jie really didn't know how to explain it to Yang Wenyong.

"Wen Yong, let me give you an analogy." The old fitter He Shihua came over and said to Yang Wenyong: "You see, the turning tool is mounted on the lead screw, the lead screw is mounted on the bearing, and the bearing is fixed on the workbench. If the workbench is installed at the time

There is a deviation of the wire, the bearing deviates by a wire on the workbench, and the screw is installed by a wire, so that the accumulation is a big deviation. A deviation of the filament, at the time of assembly is permissible, but one

If the filaments are accumulated, the accuracy will not meet the standards of others. ”,

"So, how did the Germans assemble it?" Yang Wenyong asked.

He Shihua said: "When they assemble, it's the same. But they know the structure of the entire machine and how to adjust for deviations. If the table is offset, then when they install the bearing, they consciously deviate in the other direction, so that the two sides correct each other, and the final cumulative deviation will be very small. Yang Wenyong said: "Why can't we do this? ”

He Shihua said: "Of course we can do the same. However, people's experience is accumulated after installing thousands of machine tools, and then passed down from generation to generation to form today's experience. We haven't pretended to be so many times, so we don't know as well as they know it thoroughly. For example, if I'm loading a bicycle, I can see at a glance where the installation is wrong. But when it comes to installing machine tools, I just don't know anything. ”

"I see." Yang Wenyong nodded and said.

"Okay, Wen Yong, this lathe is ready to be delivered." "Don't be discouraged, it's not as accurate as it was originally designed, but it's still very good." The price of this lathe is more than 17,000 dollars, and we only spent less than 500 dollars, making a fortune. ”

"yes, I see." Yang Wenyong replied. However, in his heart, he is not as optimistic as Ma Jie, and he is still thinking, why can others do it, but he can't? He Shihua said that people have assembled thousands or tens of thousands of times to form experience, but it's a big deal, and they have to assemble thousands or tens of thousands of times, isn't it okay?

At the other end of the workshop, Lao Dao and Wei Jingwen were disassembling a circuit board. This batch of circuit boards, which Qiao Hai also bought in Germany, was stuffed in a container and sent to Xunyang. As soon as Lao Dao and Wei Jingwen saw these circuit boards, they couldn't take a step, although they were all old boards, but most of the components on them were still intact, and these components were difficult to buy in China.

"This is a new chip, with 2,000 transistors integrated inside, which can complete filtering, frequency division, amplification and other functions on a chip, and the market price is $300." The old knife introduced to Wei Jingwen like a few treasures.

"What, you want this too?" Wei Jingwen stared at the old knife. In the past few days, whenever there are some good components, the old knife always has to be picked up first, which makes Wei Jingwen very dissatisfied. He also complained to Lin Zhenhua about this, but Lin Zhenhua didn't support him, just said that Lao Dao was an investor, and let him take what he wanted.

For Lao Dao, Wei Jingwen's attitude is also very contradictory, Lao Dao is very familiar with integrated circuits, and his knowledge in this area is of great help to Wei Jingwen. Wei Jingwen is a veteran college student majoring in electronics, and he has sufficient skills

Good enough, but for the integrated circuit chips that have appeared in recent years, the understanding is not enough. There are many chips, if it weren't for the old knife to explain to Wei Jingwen, Wei Jingwen wouldn't know what it was for. The old knife is not only able to say this

The model, function, and even a simple wiring diagram can be drawn, which saves Wei Jingwen many detours.

As for the distribution of components, in terms of heart, Lao Dao's appetite is not big, he only needs some very special chips and other special components, and most of the rest of the components are left to Wei Jingwen.

"This carp can be used in navigation equipment, for us...... Very useful. The old knife explained apologetically.

Wei Jingwen asked: "Old Dao, what do you do, why do I think these things you want are quite out of the way." It seems that you are involved in flying in the sky and swimming in the sea, and there will be no company that does such a miscellaneous business, right? ”

The old knife smiled and said, "I don't know what I do, my customers ask me for these things, so I naturally have to take them." I don't know what they did when they took it. ”

As he spoke, the old knife stretched out the soldering iron and ran towards the pins of the chip. Although he looks as fat as a bear, his hands and feet are very sharp, and Wei Jingwen argues with himself that his technology of disassembling chips is far inferior to that of the old knife.

"Okay, on this board, I just need this chip." The old knife removed the chip and put it in an anti-static bag, and then said to Wei Jingwen: "Teacher Wei, don't be dissatisfied, you see, there are 5 high-power tubes on this board, and these two electrolytic capacitors are also very valuable, and they all belong to you." As for the rest, it's not worth much and can be thrown away. ”

Wei Jingwen carefully put the board aside, and said to the old knife: "I'm not as picky as you, I want these tubes and electrolysis, and I also want other resistors and capacitors." Even if it's just an ordinary porcelain capacitor, the quality of the German product is very good, and I am reluctant to throw it away. ”

Lao Dao was surprised: "Teacher Wei, aren't you going to tell me that you have to remove every component on these boards?" ”

"Why not?" Wei Jingwen asked rhetorically.

"Do... There are only a few people in your electronics research institute, and if you want to disassemble all these boards, when are you going to do it? The old knife really worried about Wei Jingwen.

Wei Jingwen said with a smile: "Old knife, it seems that there are things you don't know." Our manager Lin has already arranged it, you see that there is no workshop over there, that is our old circuit board recycling workshop. Manager Lin said to the old circuit

To dismantle the board, we must take the road of industrialization, and we must build a dismantling production line. (To be continued.) If you like this work, you are welcome to vote for recommendation, monthly pass, your support is my biggest move

Force. ）