Volume 1: Monsters Rise!Chapter Seventy-Six: Master, what you said is rubbish to us

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A claw hammer was quickly brought in, and if it hadn't been for the older worker next to him, the worker who had taken the claw hammer would have been a flying hammer that smashed the delicate master down the steps.

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

Hitting people doesn't bring such a thing, right?

In their eyes, it is so perfect that it is not good, and the product is as precious as a child, but there is nothing worthy of praise?

"You come down for me!" Already the grumpy man began to let out angry roars.

"Come down, we have a kind of comparison of opening up posture, comparing accuracy. ”

The expression that didn't matter before, and what scene couldn't move him, disappeared from the face of the delicate master.

Instead, there was disdainful arrogance, and in the eagle-like sharp eyes, there was a lofty overlook.

At the angry voice of the crowd, the Master of Ingenuity spoke.

In a word, they instantly turned into bombed silence.

"The frame girders on both sides, I just look at it and know that it has a straightness error of more than 0.07 mm/1 meter. ”

"The 12-meter-long girder, what do you think the distortion has become?"

"Distorted into a reptile, sue me, what kind of qualified product is this?"

Everyone's anger was blocked in their throats by the words of the exquisite master.

The straightness error of the girder ......

The 12-meter-long girder is a single unit, and the larger the part, the more difficult it is to machine. The master of delicate means these two girders, crooked and crooked, and not a meter is straight.

The delicate master is right, the beam milled by the large milling machine itself has a certain accuracy error, and when it is hoisted to the frame for welding, because of the high-temperature thermal deformation generated by welding, the accuracy error of the beam is greater.

Workers can measure the error here, but within a certain margin of error, the worker feels that it will not affect the vehicle.

But how did this little old man see it?

Chief Engineer Wang Caiqi couldn't help but blush, he knew in his heart that this error was one thing, and it was another thing to be pointed out instantly.

Although it feels like there is no problem. But this error is indeed too big, put on an ordinary car, it is definitely a substandard product.

They wanted to know, but unfortunately the master of ingenuity didn't give them a chance to ask questions.

"Look at your engine reducer casing, is it round? I'll draw a circle casually, and it's all more accurate than it. ”

"It's really ridiculous, look at the screw hole spacing of your reducer shell, how big is the distance, is it to save money or time?" The delicate master waved the claw hammer: "I dare to guarantee that it will not take more than a year, and the reducer shell will begin to show lubricating oil." ”

"It's rubbish, garbage designed with no experience. ”

The reducer shell is an iron casting, but the size of this iron casting is really huge. And the reduction gear inside does not need to be in contact with the shell, so the accuracy is not so particular......

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

From the perspective of pursuing efficiency, Chief Engineer Wang Caiqi is not wrong with this design.

In order to save time and cost, it can only be simplified as much as possible in unnecessary links, which is a common practice of many heavy industry enterprises.

But!

The words of the delicate master suddenly made the chief engineer Wang Caiqi realize that he had made a heinous mistake, and it was also the most classic dogmatic mistake.

He put the original 190-ton reducer into the 240-ton class, which is not inappropriate.

However, he actually enlarged the design that originally required 48 screw holes to seal the shell to 240 tons, without any increase.

A larger size means a larger spacing between the same number of screw holes.

As the spacing increases, the tightening capacity naturally decreases. After a long time, the gaskets must be worn violently, resulting in many common problems of domestic goods - oil leakage.

Everyone was shocked into a cold sweat, and Chief Engineer Wang Caiqi's face turned pale, and he subconsciously touched his jacket pocket, took out the notebook he carried with him, and quickly recorded this heinous mistake with a trembling speed.

Wait until he writes it down in a quick way that only he can understand. Chief Engineer Wang Caiqi wiped a cold sweat and let out a cool breath.

Then he turned around and found that all the workers around him had taken out their laptops or mobile phones, and quickly recorded this fatal flaw with palpitations.

It can be said that if today's ingenious masters did not give them the initiation, they wanted to discover this overlooked detail, and only when the product was delivered to the customer, used for a year or two, and then it was flooded with questioning calls, can they organize technicians to study it.

Unfortunately, at that time, their brand reputation was going to suffer, and they were branded as unreliable, leaking, designing, and so on.

The more complex the product, from the design to the real maturity and reliability, it needs to go through a series of improvements and suffer countless losses before it can be perfect.

The words of the delicate master directly made them step on a big pit less.

"Look at your hydraulic lifting device again, the four main hydraulic lifts are so close to each other, do you want to top through the carriage?"

"Look at your turn again, I ask you to take a ruler and measure it, measure its spacing......"

"Look at your suspension design again......"

The Master of Ingenuity stood on a high operating platform, gushing without any pause, and every word he spoke, at this time, had all become the most beautiful notes in the world in the ears of those below.

Even those mouth-opening garbage, closed-mouthed unqualified mantras, have become so pleasant.

At this time, they had become hearrs, and the disdain in their hearts had been transformed into a strong admiration to the limit, and a worship that could not be pulled out by ten cows.

Rustle~

Here are a few technicians, using pen and paper they carry with them to record the sound quickly.

They have been so selfless that they have even recorded the words garbage and unqualified word for word.

Li Huaxing's expression at this time was really not much stronger, he was already standing next to a technician, reviewing every word like a reviewer, and preparing to wait for the transcription to be completed, he immediately made a copy and took it back to the office to study it behind closed doors.

He ...... He's not a doorman, isn't he in charge of guarding the door...... "The bodyguard who is pestled in place like a stake, his brain has crashed, and Bill Gates can't unravel the garbled code when he comes."

"Looking at the fly-by-wire system you designed, I can only describe it as garbage, the variable speed gear of the DC motor is obviously ......"

"Ahem~ahem~" Ye Qing heard that the exquisite master actually commented on the core technology of the mining truck, the DC motor drive system, and immediately shook his eyes with a hint.

The sudden silence of the master of ingenuity made the group of technicians and workers below who had already washed their ears and prepared to listen to them immediately become anxious.

"Master, go on. "The worker who wanted to smash him down with a hammer has now become a better learning model than the three good students, and the video recording function is directly turned on on the mobile phone.

"Master, you go on, don't stop. "Chief Engineer Wang Caiqi was climbing the construction support at this time, and he wanted to get close to the exquisite master and listen to the teachings up close.

"Master, you go on, there are still many technical defects in our garbage product, waiting for you to explain. ”

"yes, yes. The technicians below nodded wildly, throwing their previous anger to Java.

What kind of international joke, this respectable old man in front of him is definitely a world-class master, and he is even likely to have served as a top technician in Caterpillar, his words are worth ten years of blind thinking.

"It's all rubbish, and I can't finish it. The Delicate Master snorted twice and walked along the road-wide frame to the rear axle stuffed with a huge DC motor.

A silver-white drive shaft, which was a meter thick and eight meters long, as bright as a mirror, was exposed to the eyes of the delicate master.

The Ingenious Master jumped nimbly onto the rear axle and slammed the huge power shaft with the claw hammer in his hand.

When Chang~

A crisp and melodious sound of metal striking reached everyone's ears.

No one dared to speak, not even breathing.

Because the master of subtlety is listening with his eyes closed and his hands on his ears.

When the melodious crash died down, the Master of Ingenuity jumped to the other side and struck the power shaft again.

"This can also be called a power shaft? There is a dark wound in the middle, and the problem lies with it. ”

The delicate master returned to the construction frame with a disgusted look, and said to the workers and technicians who were stretching their necks and waiting for teaching: "Who is responsible for producing such a garbage power shaft?"

Including Li Huaxing, everyone looked at a technician in gray overalls.

They already have unconditional trust in the ability of the delicate master, and with just a claw hammer, they can hear the sound and discern the dark wound in the main shaft, what kind of magic is this?

"The owner...... I ......" The young technician's face turned red and he said hesitantly: "The accuracy of the power shaft is not ...... No problem, I promise. ”

"Every step of the workers is strictly in accordance with the production process, and the accuracy will not be ...... There's a problem. ”

"Master Qiao!" Chief Engineer Wang Caiqi kept scratching the silver-gray hair on his head at this time, and he was also puzzled: "If the accuracy of the spindle is not enough, it should be stuck directly, and it can't move a step, but it obviously ran more than ten kilometers." ”

"Your requirements for precision are so low that I despair......" Master Ingenuity shook his head.

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

"The materials used are too rubbish, the processing methods are too rubbish, and the quenching is too rubbish. The delicate master touched the power shaft: "The DC motor in the center of the power shaft gradually accumulates the heat generated during operation, so that the power shaft produces a slight thermal expansion. ”

"You certainly haven't calculated the coefficient of thermal expansion of the spindle, and you're overestimating the quality of this DC motor. ”

Hot...... coefficient of thermal expansion......

Chief Engineer Wang Caiqi was struck by lightning, and his body trembled violently, even more excited than a monk who had once enlightened the Dao.

Wake up the dreamer with a word!

No wonder it was normal when it started, and it took more than ten kilometers to get stuck.

By the time they drove the mining vehicle back to the workshop and unloaded eight pieces for study, the temperature of the power shaft had already dropped, and naturally no accuracy error could be measured.

When producing 190-ton mining vehicles, it was a mature foreign technology that was directly purchased, and this problem has never arisen.

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

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

I see, I see.

Large mining vehicles are engines that drive generators to work, and then generate huge amounts of electricity that drive DC motors on the rear axle.

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

Then it is only necessary to redesign the DC motor......

How to design it......

Chief Engineer Wang Caiqi was just about to scratch his ears and cheeks, and as soon as his hand touched his hair, he suddenly hung down and slapped his thigh.

The world-class master is right in front of him, and he even wants to design the motor......

Ha ha~

It's just that he's going to bleed a lot this time!