Monster Factory

A claw hammer was quickly taken. If it wasn't for the older worker, the worker with the claw hammer surely a flying hammer and took the master from the ladder.

Knocking down this little old man is the idea of ​​everyone, including Li Huaxing.

Doesn't it be against people like this?

In their eyes, the perfect product is not good. The product that is as lovable as the child does not have any place worthy of praise.

"You give me down!" The already grumpy man began to make angry snoring.

"Let's go, let's have a kind of pull-out ratio, which is better than precision."

It didn't matter before, and the scene couldn't move his expression, and disappeared from the face of the master.

Instead, the arrogance of disdain, the sharp eyes of the eagle, the high-top view.

In the voice of the crowd's anger, the master of the exquisite opening.

In a word, let them instantly become the silence that was bombed.

"The frame of the two sides of the frame, I only look at it, I know that its straightness error exceeds 0.07 mm / 1 meter."

"The 12-meter-long beam, what do you think is the distortion?"

"Twisted into a reptile, tell me, what is this qualified product?"

The anger of all people was smothered by the master of the fine, and it was stuck in the throat.

Straightness error of the girders...

The 12-meter-long beam is a whole, and the more large the part, the more difficult it is to machine. The master of exquisiteness means these two girders, twisting the song, no one meter is straight.

The master is right, the large beam milled by the large milling machine has a certain precision error. When it is lifted to the frame for welding, the high-precision thermal deformation caused by the welding makes the precision error of the beam larger.

The error workers here can measure, but within a certain margin of error, the workers feel that this does not affect the vehicle.

But how did this little old man see it?

The chief engineer Wang Cai can't help but look old. This error is a matter of understanding in his heart. It is one thing to be pointed out by people.

Although it feels no problem. However, this error is indeed too big. It is definitely not a good product for ordinary cars.

They want to know, but unfortunately, the masters did not give them the opportunity to ask questions.

"Look at your engine reducer casing, is that round? I draw a circle at hand, which is more accurate than it is."

"It's ridiculous. Look at the screw hole spacing of your reducer casing. Is it a big distance? Is it saving money or saving time?" The master master waved the claw hammer: "I can guarantee that it will take less than a year, the reducer casing will be Start to expose the lubricant."

“It’s just rubbish, it’s designed without any experience.”

The reducer housing is cast iron, but the size of this cast iron piece is really huge. And the reduction gear inside does not need to make contact with the outer casing, so the precision is not so much attention...

As long as the drilling accuracy of the position connected to the engine crankshaft is well controlled, the tolerance of the space at the beginning of the design is large enough, and the extra power is reserved for the lubricating oil.

From the perspective of pursuing efficiency, there is nothing wrong with the design of the chief engineer Wang Cai.

The parts of a mining vehicle are as vast as the vast sea. In order to save time and cost, it can only be simplified as much as possible in unnecessary links. It is a common practice of many heavy industry enterprises.

but!

In the words of the master, the chief engineer Wang Caiji suddenly realized that he had made a big mistake and was also the most classic dogma mistake.

He put the original 190-ton gearbox on the 240-ton class, and there is nothing wrong with it.

However, he actually designed the outer casing seal with 48 screw holes, which was enlarged to 240 tons, without any increase.

The size becomes larger, meaning that the spacing between the same number of screw holes becomes larger.

As the pitch becomes larger, the fastening ability naturally decreases. Over time, the seals must be severely worn, resulting in many common problems in domestically produced goods - oil spills.

Everyone was shocked by a cold sweat. The chief engineer Wang Cai was pale and subconsciously touched his jacket pocket. He took out the notebook he was carrying with him and trembled and recorded the big mistake.

When he uses a quick record that only he can understand, write down this time. The chief engineer, Wang Cai, wiped the cold sweat and gave him a cool breath.

Then he turned around and found that all the workers around him even took out their laptops or mobile phones, and they quickly recorded this fatal flaw.

It can be said that if today's ingenious masters give them a slap in the face, they want to find out the neglected details, only wait until the product is delivered to the customer, after a year or two, it is followed by a swarm of people. When the questioning phone bursts, the technicians can be organized to study.

Unfortunately, at that time, their brand reputation was affected, and they were crowned with unreliable, oil spills, design problems, and so on.

The more complex the product, the design is finalized to be truly mature and reliable, all need to undergo a series of improvements, and after eating countless losses, it can be perfect.

The words of the masters directly let them step on a big pit.

"Look at your hydraulic lifting device, the four main hydraulic lifts are so close, do you want to wear the car?"

"Look at your turn again, I am bothering you to take a ruler and measure the amount of it..."

"Look at your suspension design..."

The exquisite master stood on the high console, and there was no pause. Any word he said, in the ears of the people below, has become the most beautiful note in the world.

Even the mantras that open their mouths and fail to seal their mouths have become so sweet.

They became the hearers at this time, and the disdain in their hearts has turned into an admiration that is strong to the limit, and a worship that ten cattle can't pull.

Shashasha~

This is a few technicians who use the paper and pen with them to record the sound quickly.

They have forgotten that I am intoxicated, even the words of garbage and disqualification are recorded without missing words.

Li Huaxing’s performance at this time is really hard to go. He has stood next to a technician, reviewing each word like a manuscript, preparing to wait for the transcription to be completed, and immediately copying it back to the office and studying it behind closed doors.

"He...hes he's not a guard, is he responsible for the door..." Like a bodyguard who was kneeling in the same place as a wooden stake, the brain had already crashed, and Bill Gates came and couldn't solve the garbled.

"Look at the telex system you designed. I can only use garbage to describe it. The shifting gear of the DC motor is clearly..."

"Cough cough ~ cough ~" Ye Qing listened to the exquisite master even commented on the core technology of the mining truck, DC motor drive system, immediately with eyes and hints.

The subtle masters suddenly silenced, so that the following group of technicians and workers who had already washed their ears and prepared to listen to them immediately rushed.

"Master, you continue to say." The worker who wanted to take him down with a hammer has now become a model of learning that is better than the three good students. The phone directly turns on the video function.

"Master, you continue to say, don't stop." The chief engineer Wang Cai is climbing the construction bracket at this time. He wants to join the delicate master and listen to the teachings at close range.

"Master, you continue, we have a lot of technical defects in this junk product, waiting for you to explain."

"Yeah yeah." The following technicians nodded madly and threw the previous anger into Java.

What an international joke, the respectable old man in front of him, is definitely a world-class master, and even a top technician who has probably served as a Caterpillar company. His words are worthy of his ten years of experience.

"It's all rubbish, it can't be finished." The master master screamed twice, following the spacious frame of the road, and went to the rear axle with a huge DC motor.

A silver-white drive shaft that is one meter thick and eight meters long and bright like a mirror is exposed in the eyes of a master.

The exquisite master flexibly jumped onto the rear axle and hammered the huge power shaft with a claw hammer in his hand.

When 啷~

A crisp, melodious metal hits the sound and passes it to everyone's ears.

No one dares to speak, even the breath is temporarily closed.

Because of the master, he is closing his eyes and holding his hands on his ears to listen.

When the melodious percussion disappeared, the ingenious master jumped to the other side and tapped the power shaft again.

"This can also be called the power shaft? There is still a dark injury in the middle, and the problem lies on it."

The delicate master returned to the construction frame with a disgusted look, and directed at the workers and technicians who stretched their necks and waited for the teachings: "Who is responsible for the production of the power shaft of such garbage?"

Together with Li Huaxing, everyone looked at a technician wearing a gray overall.

They have unconditionally trusted the ability of the masters, and with a claw hammer, they can hear the darkness in the spindle. What kind of magic is this?

"Boss... I..." The young technician was flushed and said with a sigh of relief: "The accuracy of the power shaft is not... no problem, I can guarantee it."

“Every step of the workers is strictly in accordance with the production process, and the accuracy will not... there is a problem.”

"Qiao master!" Chief engineer Wang Cai, this time keeps scratching his head on silver-gray hair, but also a face is puzzled: "If the spindle accuracy is not enough, it should be directly stuck, and one step can not move, but it clearly runs. More than ten kilometers."

"Your requirements for precision, low makes me feel desperate..." The master carefully shook his head.

"But the problem is not in accuracy, although the accuracy only meets the minimum requirements."

“The materials used are too rubbish, the processing method is too rubbish, and the quenching is too rubbish.” The master master touched a power shaft: “The DC motor in the center of the power shaft, the heat generated during work gradually accumulates, causing a slight thermal expansion of the power shaft. ""

"You certainly haven't calculated the thermal expansion coefficient of the main shaft, and too overestimated the quality of this DC motor."

Heat...thermal expansion coefficient...

The chief engineer, Wang Cai, was struck by lightning and his body trembled violently, even more excited than the monk who was enlightened.

A word to wake up the dream!

No wonder that everything was normal at startup, and it took more than ten kilometers to get stuck.

When they drove the mining truck back to the workshop, the temperature of the power shaft had already dropped, and naturally no accuracy error could be measured.

When producing a 190-ton mining vehicle, it is a foreign mature technology purchased directly. This problem has never happened.

The self-developed 240-ton, spindle material has also been used with 190-ton spindle material, so the culprit is naturally DC motor.

As long as you work **** the heat dissipation problem of the DC motor, you can solve the problem of jamming.

It turned out to be the case.

Large mining vehicles are engines that drive the generator to work, and then generate a huge amount of electricity to drive the DC motor on the rear axle.

The DC motor of the 190-ton mining vehicle and the DC motor of the 240-ton class are necessarily two designs.

Then you only need to redesign the DC motor...

How to design it...

The chief engineer Wang Cai was just ready to scratch his ears, and when he just touched his hair, he suddenly hanged down and slammed his thigh.

The world-class master is in front of him, and he still wants to use the axe to design the motor...

Haha~

It’s just his chairman, this time it’s going to bleed!

...