A claw hammer was quickly brought over. If it wasn't for the older workers blocking the claw hammer, the worker with the claw hammer would have smashed the master artisan down the stairs.
Including Li Huaxing, everyone was thinking of smashing the old man down.
Even if you want to beat someone down, you shouldn't do this right?
In their eyes, the product was perfect. It was like a child's treasure, but it didn't have anything worth praising?
"Get down here!" There were already some people with bad tempers who began to angrily roar.
"Get down. If you have the guts, then let's have a competition of precision."
The previous indifferent expression that could not be moved by any scene disappeared from the face of the Master Craftsman.
Instead, it was replaced by a look of disdain and arrogance. His hawk-like sharp eyes revealed a look of condescension.
Along with the angry voices of the crowd, the master artisan opened his mouth.
One sentence, and they instantly fell into a bombardment of silence.
"I only need to take a look at the two sides of the frame to know that the straightness error is more than 0.07 mm/1 meter."
"The 12 meter long beam, look at how crooked it is."
"It's crooked like a reptile. Tell me, what kind of qualified product is this?"
Everyone's anger was blocked in their throats by the words of the Master Craftsman.
The straightness error of the beam … …
The 12 meter long beam was a whole. The larger the part, the harder it was to process. What the master artisan meant was that the two beams were crooked. Not one meter was straight.
What the master artisan said was right. The beams made by the large milling machine had a certain degree of accuracy error. When they were being welded on the frame, because of the high temperature caused by the welding, the accuracy error of the beam was even greater.
The error here could be measured by the workers, but within a certain range, the workers felt that it wouldn't affect the vehicle.
But how did this old man see it?
Chief engineer Wang Caiqi couldn't help but blush. It was one thing for him to know the error, but another thing for someone to point it out.
Although he felt that there was no problem. But the error was indeed a bit too big. If it was placed on a normal car, it would definitely not be a qualified product.
They wanted to know, but the master artisan didn't give them the chance to ask.
"Look at the outer casing of your engine reducer. Is that round? Even a circle I draw is more precise than this. "
"That's ridiculous. Look at the spacing between the screw holes on the outer shell of your reducer. The spacing is so big. Are you trying to save money or time?" The Master Craftsman waved the claw hammer: "I can guarantee that in less than a year, the outer shell of the reducer will begin to show lubrication oil."
"This is simply rubbish. Rubbish designed by someone without any experience."
The outer shell of the reducer was made of cast iron, but the size of this cast iron was a little too big. Also, the reduction gear inside didn't need to be in contact with the outer shell, so the precision wasn't that important …
It would be fine as long as the accuracy of the drilling holes connected to the crankshaft of the engine was controlled well. Anyway, the tolerance at the beginning of the design was large enough, and the extra space was left for the lubricating oil.
From the perspective of efficiency, Chief Engineer Wang Caiqi's design wasn't wrong.
The parts of a mining truck were as vast as the ocean. In order to save time and cost, they had to simplify the parts as much as possible. This was the common practice of many heavy industry companies.
But!
The words of the Master Artisan made Chief Engineer Wang Caiqi realize that he had made a huge mistake. At the same time, it was also a classic mistake.
He had put the original 190 ton reducer on the 240 ton scale. There was nothing wrong with it.
But he had actually enlarged the original 48 screw holes to the 240 ton scale. There wasn't any increase.
The larger the size, the larger the spacing between the screw holes.
The larger the spacing, the lower the fastening ability. After a long time, the gasket would be severely damaged. This would cause many domestic products to have problems – oil leakage.
Everyone broke out in cold sweat. Chief Engineer Wang Caiqi's face was pale. He subconsciously touched his shirt pocket and took out his notebook. Trembling, he quickly recorded down this monstrous mistake.
When he used a quick jotting method that only he could understand to jot down the message, he wrote it down. Chief Engineer Wang Caiqi fiercely wiped away his cold sweat and let out a long breath.
Then he turned around and found that all the workers beside him had taken out their notebooks and phones. They were all fearfully recording down this fatal flaw.
It could be said that if the Master Artisan didn't enlighten them today, they would have to wait until the product was delivered to the customer for a year or two before being bombarded by a swarm of questioning calls. Only then would they be able to organize the technicians to research this flaw.
Unfortunately, at that time, their brand reputation would be affected. They would be labeled as unreliable, oil leakage, design problems, and so on.
The more complex the product, the more it would need to go through a series of improvements before it could be truly mature and reliable. They would have to suffer countless losses before they could achieve perfection.
The Master Artisan's words directly saved them from stepping into a big hole.
"Look at your hydraulic lift device. The four main hydraulic lifts are so close together. Are you trying to break through the carriage?"
"Look at your direction of rotation. I'll have to trouble you to take a ruler and measure the spacing between them …"
"Look at your suspension design …"
The Master Artisan stood on the high console, talking without any pause. Every word he said, at this time, in the ears of the people below, had all become the most beautiful notes in the world.
Even the catchphrases of 'trash' and 'unqualified' sounded so pleasing to the ears.
At this time, they have become Seekers. The disdain in their hearts before has turned into strong admiration and worship that can't be moved by ten cows.
Rustle ~
This is the sound of several technicians quickly recording with the pen and paper they carry with them.
They have been so intoxicated that even the words garbage and unqualified are recorded without missing a word.
At this time, Li Huaxing's performance was really not that good. He was already standing beside a technician, reviewing every word as if he was reviewing a manuscript. He was prepared to immediately make a copy and take it back to the office to study behind closed doors after the copying was completed.
"He … isn't he the guard, responsible for guarding the door …" The bodyguard who stood in place like a wooden stake, his brain has crashed, and even Bill Gates can't solve it.
"Look at the telex system you designed, I can only use garbage to describe it, the transmission gear of the DC motor can obviously …"
"Cough ~ cough ~" When Ye Qing heard the Master Artisan comment on the core technology of the mining truck, the DC motor transmission system, he immediately threw a hint with his eyes.
The sudden silence of the Master Artisan made the technicians and workers who had already washed their ears ready to listen immediately anxious.
"Master, please continue." The worker who wanted to smash him down with a hammer has now become more obedient than a good student. The phone directly turned on the video function.
"Master, please continue, don't stop." Chief engineer Wang Caiqi was climbing the construction support at this time. He wanted to get close to the Master Artisan and listen to his teachings closely.
"Master, please continue, our garbage product still has a lot of technical defects, waiting for your explanation."
"That's right, that's right." Several technicians below nodded wildly. They had already thrown their previous anger to Java.
What kind of international joke is this, the respectable old man in front of them is definitely a world-class master, and may even have been a top technician at Caterpillar. His one sentence is worth ten years of blind thinking.
"It's all garbage, I can't finish it." The Master Artisan snorted twice, following the spacious road like frame, walked to the rear axle with the huge DC motor.
A one meter thick, eight meters long, bright like a mirror silver white drive shaft, exposed in the eyes of the Master Artisan.
The Master Artisan nimbly jumped on the rear axle, and used the claw hammer in his hand to hit the huge drive shaft.
Clang ~
A crisp and melodious sound of metal hitting metal, passed to everyone's ears.
No one dared to speak, and even temporarily held their breath.
Because the Master Artisan, with his eyes closed, put his hand next to his ear to listen.
When the melodious sound of the impact disappeared, the Master Artisan jumped to the other side, and hit the drive shaft again.
"This can also be called a drive shaft? There are hidden injuries in the middle, and the problem is on it. "
The Master Artisan returned to the construction frame with a disgusted look, and said to the workers and technicians who stretched their necks and waited for instruction: "Such a garbage drive shaft, who is responsible for producing it?"
Everyone, including Li Huaxing, looked at a technician in a gray uniform.
They have unconditional trust in the ability of the Master Artisan. With only a claw hammer, they can tell that there are hidden injuries in the drive shaft. What kind of skill is this?
"Boss … I …" The young technician's face was red, and he said hesitantly: "The precision of the drive shaft is … no problem, I can guarantee."
"Every step of the workers is strictly in accordance with the production process, the precision will not … have a problem."
"Master Artisan!" Chief engineer Wang Caiqi kept grabbing his silver-gray hair at this time, and he was also puzzled: "If the precision of the drive shaft is not enough, it should be directly stuck, and it can't move a step, but it clearly ran more than ten kilometers."
"Your requirements for precision are so low that I feel despair …" The Master Artisan shook his head.
"But the problem is not with the precision, even though the precision is only at the minimum requirement."
"The materials used are too garbage, the processing method is too garbage, and the quenching is too garbage." The Master Artisan touched the drive shaft: "The DC motor in the middle of the drive shaft, when working, the heat generated gradually accumulates, causing the drive shaft to have a slight thermal expansion."
"You definitely did not calculate the thermal expansion coefficient of the drive shaft, and at the same time overestimated the quality of the DC motor."
Thermal … thermal expansion coefficient …
Chief engineer Wang Caiqi looked like he was struck by lightning, his body violently trembling, and he was even more excited than a cultivator.
One sentence to wake up the dreamer!
No wonder everything was normal when it started, and only after running for more than ten kilometers did it start to get stuck.
When they drove the mining cart back to the workshop and dissected it for research, the temperature of the drive shaft had already dropped, and naturally they couldn't measure the accuracy of the drive shaft.
When they produced the 190 ton mining cart, they directly bought the mature foreign technology, so this problem had never occurred before.
The self-developed 240 ton mining cart, the drive shaft material, had always been 190 ton, so the culprit was naturally the DC motor.
As long as they worked on the heat dissipation of the DC motor, the problem of the drive shaft being stuck could be easily solved.
So it was like this, so it was like this.
Large scale mining carts were all powered by engines, which drove the generator, and then generated a large amount of electricity to drive the DC motor on the rear axle.
The DC motor of the 190 ton mining cart and the 240 ton DC motor were naturally two different designs.
Then they only needed to redesign the DC motor …
How to design it …
Chief engineer Wang Caiqi was just about to scratch his head, but when his hand touched his hair, he suddenly slapped his thigh.
The world class master was right in front of him, and he actually wanted to show off by designing a motor …
Haha ~
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