When will I have a long tassel?

A group of people took measuring tools such as calipers, micrometers, angle rulers, plug gauges, etc. and began to review the dimensions of the parts. They found out a lot of problems. The length here was a few tenths of a millimeter missing, the angle was off by a few degrees, and so on. , there are dozens of them.

In the past, no one cared about such problems at all. Longji's products have always been low-priced. If the carrot is too fast, it will not wash the mud. This is the situation of Longji. If every part has strict requirements, how can production efficiency be improved? How can costs be reduced?

In fact, the machinery and equipment are not that delicate. In some places, the difference is just a few tenths of a millimeter. If you file it with a file or put something on it, it will be smoothed over and it will not affect the use. The fit between some parts is not good, and the movement seems jerky. After a while, they will run in. How big of a problem can this be?

But this time, no one dared to think like this anymore. The equipment had malfunctioned and the cause could not be found at all. How could anyone dare to let go of any clues. As a result, a batch of parts were required to be reworked, and engineers went to the production site to monitor every link, and workers were not allowed to make any operations that deviated from the process requirements. Longji has reached the level of ISO9000 certification overnight.

"Okay, it's totally fine."

Zhao Xingwang rubbed his sore waist and announced loudly.

After an all-night inspection, all possible problems have been corrected, and a new front-end mechanism support shaft has been machined. The surface of the shaft has been polished so brightly that it can almost be used as a mirror.

"Assembly begins now. Everyone pays attention. There should be no bumps during the assembly process. Any bumps may affect the quality of the equipment!" Zhao Xingwang warned.

This is an assembly process that is comparable to artistic creation. Everyone follows the principle of handling with care. The number of turns of a screw is done in strict accordance with the specifications. No one dares to twist it as carelessly as in the past. Just fine. In everyone's opinion, what they are installing is not a silly, big, black and thick baler, but a sophisticated clock.

"It should be okay, 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 should be fine." Liu Nian said.

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

Liu Nian smiled bitterly and shook his head: "How is this possible? If equipment like a baler has such a big problem just because the installation is not precise enough, then don't use it. Think about its working scene. Yes, with hundreds of tons of pressure, the machine must be very strong."

"But if it wasn't this, what could it be?"

"Who knows, I hope it works this time..."

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

It's definitely not just Pan Youdong and Liu Nian who are murmuring in their hearts. In fact, Zhao Xingwang is also in a state of confusion. But now that things have happened, he has no other choice but to give it a try first.

The baler was reassembled. A worker threw a bunch of iron shavings into the machine and pressed the button. The equipment runs very smoothly, and even the noise is several decibels lower than before. This should be due to the improvement in processing accuracy. The front-end mechanism opened smoothly, a compressed block was pushed out, and then the mechanism reset, everything looked so beautiful.

"Change materials and throw in scrap steel bars!" Zhao Xingwang's tone was filled with vibrato.

A pile of scrap steel bars was thrown in, the upper cover was closed, and the main hydraulic rod and the side thrust hydraulic rod exerted force at the same time. You can't see the deformation of the steel bars in the machine body, but you can also see from the pushing process of the hydraulic rod that the packaging process is progressing smoothly. However, what everyone is more concerned about is the situation of the front-end organization. Everyone is silently thinking in their hearts: Don't let anything go wrong!

"when!"

There was a sound of metal colliding, the locking mechanism opened, and a pressed block 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 block. Finally, all the efforts were in vain. The newly assembled baler withstood the pressure test of packing steel bars. Could it be that the problem really lies in the machining accuracy? Can the problem be solved by replacing the support shaft?

However, this is unscientific!

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

Zhao Xingwang sighed softly and said: "I don't know either. Logically speaking, the problem should not be in this aspect, but the current situation is exactly the opposite. I think it's better to pack a few more bags and see. Can the quality be stable?”

"That's for sure." Zhao Xinggen said, "If things go well in the factory like last time, but problems arise when we get to Yu Changfa, we will be really embarrassed."

"Alas..." Zhao Xingwang sighed, and then ordered the workers: "Put in the materials again!"

Another batch of short steel bars was put in, compressed, and unpacked, and they were in good condition.

"Again!"

"Click!"

Just after the third press, what everyone was most worried about finally happened. There was still the same sound of metal breaking, and it was still the same place. The newly made support shaft only lasted two rounds longer than its predecessor.

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

"What's the reason?" Zhao Xinggen's face turned as dark as if it was about to rain.

"Maybe..." Zhao Xingwang couldn't continue. His mind was at a loss. He had done everything he could, but the result was still the same. What was the problem?

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

"What guess?" Zhao Xingwang asked lazily.

Pan Youdong said: "Is the content written in this newspaper deliberately misleading us?"

"Induction? What induction do you mean?" Zhao Xingwang asked.

"Mr. Xiao Zhao, you see, they emphasized that it was because our machining accuracy was not enough, which caused the malfunction. Could it be that the opposite is true, and it was precisely because our machining accuracy was too high that this happened? The fault. I just thought about it. The higher the processing accuracy of each component, the smaller the friction. In this way, all the pressure of the hydraulic rod will be transmitted to the front-end mechanism. The support rod will bear too much pressure, so it will break. If If we lower the machining accuracy, maybe everything will be fine..." Pan Youdong said clearly, and it seemed to make some sense.

Zhao Xinggen said: "But, didn't you say that the processing accuracy of Linyi Machine's baler is very high?"

Pan Youdong said: "I just recalled that when we copied and tested the baler of Yuntang Company, we focused on the support shaft. We didn't seem to pay special attention to the machining accuracy of other places."

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

Pan Youdong said: "We did test it, but looking back now, it seems that the test was not very serious. We were a little preconceived and always felt that the processing accuracy of the Linyi machine must be very high. Maybe they were just the other way around."

"Will this happen?"

"Hard to say……"

"..."

Everyone was confused. Zhao Xingwang thought about it seriously. It seemed that when he was testing a baler a few days ago, he did make some mistakes and did not check the machining accuracy of each component. Being misled by the newspaper, you and other engineers may subconsciously feel that the other party's accuracy requirements are very high. What if this is not the case?

Thinking further, there are even more questions. Everyone also has their own preconceptions about the shape of each component. For example, everyone subconsciously thinks that the diameter of an axis is the same everywhere, and will not measure every point when measuring. But if Linyiji made some manipulations to make some parts of the shaft a little thicker and some parts a little thinner, the force distribution on the shaft would be completely different. Think about it, if a force acts on the head of the lever and acts on the middle of the lever, will the effect be the same?

"What should we do now?" Zhao Xinggen asked.

"Try!" Zhao Xingwang said decisively, "I don't believe what tricks Linyi Machine can pull off."

"Okay, we still have 36 hours..." Zhao Xinggen said.

Practice shows that 36 hours can only be regarded as a white horse for developing a machine. Zhao Xingwang and a group of technicians worked hard for another two days and one night. On the afternoon of the third day, he finally sat down dejectedly. Regardless of changing the machining accuracy of the component or adjusting the shape of the component, the problem of broken shafts cannot be solved in the end.

Several times, the newly assembled baling machine was able to continuously punch out more than a dozen pieces of scrap steel bars, making people feel that victory was just around the corner, but then the support shaft could no longer hold it and broke into two pieces with a click. The most depressing thing is that when they made a new shaft and replaced it according to the last time, the previous results no longer appeared, making people feel that the progress just now was actually just a cloud.

At this point, Zhao Xinggen no longer dared to have any illusions. Even if they could piece together a barely functional baling machine, he would not dare to sell it to Yu Changfa, because no one could guarantee that such a baling machine would not malfunction if they did not understand the principle themselves. He couldn't explain it.

He called Yu Changfa and admitted with great frustration that Longji could not imitate a qualified baler and asked Yu Changfa to hire someone else. As for the previously agreed compensation, he will pay every penny to Yun Tang Company and will never default on the payment.

After hanging up the phone from Zhao Xinggen, Yu Changfa immediately dialed a number far away in Linhe:

"Hey, is this Han Gong? I'm Lao Yu from Jinnan. After we tried your baler, we found the effect to be quite satisfactory. We want to order three more units. There's no problem with prepayment or anything else. I just hope It can be shipped faster... Uh-huh, what, you have to queue up, it will take a month at the earliest? Korean workers, we are old friends, can you help me go through the back door and speed it up, even if the price is higher? It can be any higher..."