A cadre of people took calipers, micrometers, angle rulers, plug gauges and other measuring tools and began to review the size of the parts, and the results really found a bunch of problems, the length here is less than a few tenths of a millimeter, there is a few degrees of angle difference and so on, there are always dozens of items. In the past, no one cared about such a problem, the products of the dragon machine have always been won at low prices, and the radish is fast and does not wash the mud, which is the situation of the dragon machine. If each part is strictly required, how can the production efficiency be improved, and how can the cost be reduced?

In fact, the machinery and equipment are not so delicate, and in some places there is a difference of a few tenths of a millimeter, take a file to file it, or pad something, and it will be fooled, and it will not affect the use. Some parts do not fit well together, and they appear jerky when they move, and they will run in after a while, how big of a problem can it be?

But this time, everyone didn't dare to think like this anymore, the equipment was out of order, and the reason couldn't be found at all, so how dare you let go of any clues. As a result, a batch of parts was required to be reworked, and engineers went to the production site to keep an eye on every link, and workers were not allowed to make any operations that deviated from the process requirements. The dragon machine can be regarded as reaching the level of ISO9000 certification overnight.

"Okay, no problem at all. ”

Zhao Xingwang rubbed his sore waist and announced loudly.

After an overnight inspection, all possible faults have been corrected, and a new front-end mechanism support shaft has been machined out, and the surface of the shaft is polished to a shiny surface that can almost be used as a mirror.

"Now that the assembly begins, all the people should pay attention to it, there can be no bumps in the assembly process, and any bump may affect the quality of the equipment!" Zhao Xingwang advised.

This is an assembly process comparable to artistic creation, all of them follow the principle of care, a screw is turned several times in strict accordance with the specifications, no one dares to screw as in the past. In everyone's opinion, what they are installing is not a stupid black and thick baler, but a precision clock.

"It should be possible, right?"

Pan Youdong stood aside, watching the fitters busy on the machine, and asked Liu Nian beside him in a low voice.

"I think it's going to be fine. Liu Nian said.

"But do you believe that the problem is the installation?" Pan Youdong asked again.

Liu Nian smiled bitterly and shook his head: "How is this possible? If there is such a big problem with equipment like a baler just because the installation is not precise enough, then don't use it." If you think about what kind of working scene it looks like, hundreds of tons of pressure, the machine has to be very leather. ”

"But if it wasn't for that, what would it be?"

"Who knows, I hope it will work this time......"

"I'm going to buy incense ......"

It is definitely not just Pan Youdong and Liu Nian who are muttering in his heart, in fact, Zhao Xingwang's heart is also up and down, but now that he has no other way, he can only try it first.

The baler was reassembled, and a worker threw a pile of iron shavings into the body and pressed the button. The machine runs very smoothly and even the noise is a few decibels lower than before, which is probably due to the improved machining accuracy. The front-end mechanism was successfully opened, a compressed mass was pushed out, and then the mechanism was reset, and everything looked so good.

"Change the material, throw in the scrap steel bar!" Zhao Xingwang's tone was a little trilled.

A pile of waste steel bars was thrown in, the upper cover was closed, and the main hydraulic rod and the side thrust hydraulic rod were exerted at the same time. You can't see the deformation of the steel bars in the body, but you can also see that the packing process is going smoothly from the pushing process of the hydraulic rod. However, everyone is more concerned about the situation of the front-end organization, and everyone is silently reading in their hearts: Don't have a problem!

"Dang!"

With the sound of metal clashing, the locking mechanism opened, and a pressed lump was pushed out and fell to the ground.

"Good!"

Everyone cheered in unison, and a stone hanging in their hearts fell to the ground like a metal lump. In the end, the newly assembled baler withstood the pressure test of baling steel bars. Could it be that the problem really lies in the machining accuracy, and the problem is solved by replacing a support shaft?

However, this is not scientific!

"Xingwang, look, has the problem been solved?" Zhao Xinggen asked his younger brother.

Zhao Xingwang sighed lightly and said, "I don't know either." Logically speaking, the problem should not be in this area, but the situation is the opposite. I think it's better to press a few more bags to see if the quality can be stable. ”

"That's for sure. Zhao Xinggen said, "If we press well in the factory like last time, there will be problems on Yu Changfa's side, and we will really lose face." ”

"Alas......" Zhao Xingwang sighed, and then instructed the workers: "Feed again!"

Another batch of short steel bars was thrown in, compressed, and out of the package, and the condition was good.

"One more time!"

"Click!"

Just pressed to the third time, everyone's worst fears finally happened. It's still the same metal crackling, still in one place, and the newly created support shaft has only lasted two more rounds than its predecessor.

"Holy!" Zhao Xingwang roared angrily, blood flowing from the corners of his mouth.

"What is the reason for this?" Zhao Xinggen's face was as black as if it was going to rain.

"Maybe it's ......" Zhao Xingwang couldn't go on, his mind was at a loss, everything he could did was done, the result was still the same, what was the problem?

"Mr. Zhao, Mr. Zhao, I have a guess...... Pan Youdong timidly stepped forward and said.

"What speculation?" Zhao Xingwang asked lazily.

Pan Youdong said: "Could it be that what is written in this newspaper is deliberately inducing us?"

"Inducement, what are you talking about?" Zhao Xingwang asked.

"Mr. Xiao Zhao, you see, they especially emphasized that it was because our processing accuracy was not enough, so it led to the failure. Could it be that the opposite is true, it is precisely because of our high machining accuracy that such a failure occurs. I just pondered that the machining accuracy of each component is high, and the friction is small, so that the pressure of the hydraulic rod will be transmitted to the front end mechanism, and the pressure on the support rod is too large, so it will break. If we reduce the machining accuracy a little, maybe it will be fine......" Pan Youdong said with a head, and it sounds like there is a little bit of truth.

Zhao Xinggen said: "However, didn't you say that the processing accuracy of the packaging machine of Linyi machine is very high?"

Pan Youdong said: "I just recalled that when we imitated the baler of Yuntang Company, our attention was on the support shaft, and we didn't seem to pay special attention to the machining accuracy in other places. ”

Zhao Xingwang said: "I remember telling you that you should test the surface roughness. ”

Pan Youdong said: "We did test, but now that I look back, it seems that the test was not particularly serious. We are a little preconceived, and always feel that the machining accuracy of the Linyi machine must be very high, maybe they are just the opposite. ”

"Will that happen?"

"It's hard to say......"

“......”

Everyone was confused, Zhao Xingwang thought about it seriously, it seems that when he imitated the packaging machine a few days ago, he did have some negligence, and he did not specifically check the machining accuracy of each component. Misled by the newspapers, I and other engineers may subconsciously feel that the other party's accuracy requirements are very high, what if this is not the case?

Further down the spectrum, there are even more problems. Everyone also has preconceived ideas about the shape of each part. For example, everyone subconsciously thinks that the diameter of an axis is equal everywhere, and does not measure every point when measuring it. But if the machine does the hands and feet, so that some parts of the shaft are a little thicker, and some places are a little thinner, the force distribution of the shaft is completely different. Think about it, if a force acts on the head of the lever and acts in the middle of the lever, will the effect be the same?

"So what now?" asked Zhao Xinggen.

"Try!" Zhao Xingwang said categorically, "I don't believe that Linyi can play any tricks." ”

"Well, we still have 36 hours to ......," Mr. Zhao said.

Practice has shown that 36 hours can only be regarded as a white horse gap for the development of a machine. Zhao Xingwang took a group of technicians to fight for two days and one night, and by the afternoon of the third day, he finally sat down depressedly. Whether it is changing the machining accuracy of the part or adjusting the shape of the part, the problem of broken shaft cannot be solved in the end.

On several occasions, the newly assembled baler has been able to punch out more than a dozen pieces of waste steel bars in a row, making people feel that victory is just around the corner, but then the support shaft can no longer bear it, and it breaks into two with a click. The most frustrating thing is that when they re-made a shaft as they did last time and replaced it, the previous achievements were no longer there, making people feel that the progress just now was actually just a floating cloud.

At this point, Zhao Xinggen didn't dare to have any illusions anymore. Even if they could piece together a barely usable baler, he wouldn't dare to sell it to Yu Changfa, because without them understanding the principle themselves, no one could guarantee that such a baler would not malfunction, and he would not be able to explain at that time.

He made a phone call to Yu Changfa, and admitted very frustrated that Longji could not imitate a qualified packer, and asked Yu Changfa to ask Gao Ming. As for the compensation previously agreed, he will pay it to Yuntang Company in a fraction of the amount, and he will never be reckless.

Hanging up Zhao Xinggen's phone, Yu Changfa immediately dialed a number far away in Linhe:

"Hey, is it Han Gong? I'm Jingnan's old Yu. After we tried your packer, we think the effect is quite ideal. We want to order three more, and the prepayment is no problem, but we hope to be able to ship it quickly,...... Mmmm, what, you have to queue up, it will take a month at the earliest? Han Gong, we are old friends, can you help my brother and me go through the back door, speed up a little, even if the price is a little higher......"