Chapter 76

A crowbar was quickly brought over, and if it weren't for the older workers restraining him, the worker with the crowbar would have surely thrown it to knock the Master of Ingenuity off the ladder.

Knocking this little old man down was the thought of everyone, including Li Huaxing.

Isn't it too much to criticize people like this?

In their eyes, the product was perfect, as precious as a child, yet it had no single praiseworthy point?

"Get down here!" An irascible person began to roar in anger.

"Get down, if you have the guts, let's compare, just on precision."

The indifferent expression on the Master of Ingenuity's face, which nothing could move, disappeared.

Instead, there was a look of disdainful arrogance, and his sharp, eagle-like eyes revealed a condescending gaze.

Amidst the angry voices of the crowd, the Master of Ingenuity spoke.

One sentence made them instantly silent, as if they had been bombed.

"By just looking at the two side beams, I can tell that the straightness error exceeds 0.07 millimeters per meter."

"Look at the 12-meter-long beam, how crooked it is?"

"It's twisted like a worm. Tell me, how can this be a qualified product?"

Everyone's anger was stifled in their throats by the Master of Ingenuity's words.

The straightness error of the beam...

A 12-meter-long beam is a single piece, and the larger the part, the harder it is to process. The Master of Ingenuity meant that these two beams were crooked, with no meter being straight.

The Master of Ingenuity was right. The large milling machine itself has a certain precision error, and when the beam is lifted and welded to the frame, the high-temperature deformation caused by welding makes the precision error even greater.

The workers could measure this error, but within a certain error range, they believed it would not affect the vehicle.

But how did this little old man see it?

Chief Engineer Wang Caiqi couldn't help but blush. He knew the error, but it was another matter to have it pointed out instantly.

Although he felt there was no problem, the error was indeed too large. On a regular car, it would definitely be a defective product.

They wanted to ask, but unfortunately, the Master of Ingenuity did not give them the chance.

"Look at your engine reducer housing. Is it round? I can draw a circle with my hand that is more precise than it."

"Truly ridiculous. Look at the spacing of the screw holes on your reducer housing. So wide, are you saving money or time?" The Master of Ingenuity waved the crowbar. "I guarantee that within a year, the reducer housing will start to leak lubricating oil."

"This is simply garbage, a design by someone with no experience."

The reducer housing is a cast iron piece, but this cast iron piece is indeed quite large. And the internal reduction gears do not need to contact the housing, so the precision is not that critical...

As long as the drilling precision at the connection point with the engine crankshaft is controlled well, the design initially left enough tolerance, and the extra space is for the lubricating oil.

If we consider efficiency, Chief Engineer Wang Caiqi's design was not wrong.

A mining truck has countless parts. To save time and cost, simplifying unnecessary steps is a common practice in many heavy industries.

But!

One sentence from the Master of Ingenuity suddenly made Chief Engineer Wang Caiqi realize that he had made a huge mistake, a classic and fundamental error.

Using the original 190-ton reducer on a 240-ton truck was not wrong.

But he had scaled up the design that required 48 screw holes for the housing seal to the 240-ton truck without any increase.

The larger size meant that the same number of screw holes had a greater spacing.

Greater spacing means reduced clamping ability. Over time, the gasket would wear out severely, leading to a common problem in domestic products—oil leakage.

Everyone broke out in a cold sweat. Chief Engineer Wang Caiqi's face turned pale, and he subconsciously reached into his pocket, pulled out his notebook, and quickly recorded the catastrophic error, trembling.

When he finished recording it in his rapid, personal style, Chief Engineer Wang Caiqi wiped the cold sweat from his forehead and took a deep breath.

Then he turned around and found that all the workers around him had pulled out their notebooks or phones and were frantically recording the fatal flaw, still in shock.

Without the Master of Ingenuity's enlightenment today, they would have only discovered this overlooked detail after the product was delivered to the customer, used for a year or two, and the flood of complaint calls started, forcing them to organize technical personnel to study it.

Unfortunately, by then, their brand reputation would be affected, labeled as unreliable, leaky, and poorly designed.

The more complex the product, the more it needs to go through a series of improvements and setbacks to become mature and reliable.

One sentence from the Master of Ingenuity saved them from a major pitfall.

"Look at your hydraulic lifting system. The four main hydraulic jacks are so close together, are you trying to puncture the truck bed?"

"Look at your steering. I'll trouble you to take a ruler and measure the spacing..."

"Look at your suspension design..."

The Master of Ingenuity stood on the high operating platform, speaking non-stop without any pause. Every word he said was now the most beautiful melody to the ears of those below.

Even his usual phrases of "garbage" and "unqualified" sounded pleasant.

They had become seekers of truth, and their previous disdain had turned into extreme admiration and unshakable reverence.

Scribble, scribble, scribble...

This was the sound of several technicians quickly recording with their pens and paper.

They were so engrossed that they even recorded the words "garbage" and "unqualified" without missing a single word.

Li Huaxing's performance was not much better. He was already standing next to a technician, reviewing each word like a proofreader, ready to copy it and take it back to his office to study in private.

"Isn't he... isn't he the gatekeeper, responsible for watching the gate..." The bodyguard, standing like a wooden stake, was in a state of mental freeze, a mess that even Bill Gates couldn't unravel.

"Look at your designed electrical transmission system. I can only describe it as garbage. The speed-changing gears of the DC motor are clearly..."

"Cough, cough..." Ye Qing immediately gave a warning look when the Master of Ingenuity started to comment on the core technology of the mining truck, the DC motor transmission system.

The sudden silence from the Master of Ingenuity made the technicians and workers, who were ready to listen, immediately become restless.

"Master, please continue." The worker who had wanted to hit him with a hammer was now a model student, even more obedient than a three-good student, and had his phone recording.

"Master, please continue, don't stop." Chief Engineer Wang Caiqi was climbing the construction scaffold, wanting to get closer to the Master of Ingenuity to listen closely.

"Master, please continue. Our garbage product has many technical flaws waiting for your explanation."

"Yes, yes." The technicians nodded frantically, having long forgotten their previous anger.

What kind of international joke was this? The respected old man in front of them was undoubtedly a world-class master, possibly even a top technician at Caterpillar. One word from him was worth ten years of their own blind fumbling.

"All garbage, can't even finish describing it." The Master of Ingenuity grunted and walked along the wide frame to the rear axle, where a huge DC motor was installed.

A silver-white drive shaft, one meter in diameter and eight meters long, shone like a mirror, came into the Master of Ingenuity's view.

The Master of Ingenuity nimbly jumped onto the rear axle and struck the huge drive shaft with the crowbar.

Clang~

A clear, resonant metallic sound echoed in everyone's ears.

No one dared to speak, even holding their breath.

Because the Master of Ingenuity was closing his eyes and listening, his hand cupped to his ear.

When the resonant sound faded, the Master of Ingenuity jumped to the other side and struck the drive shaft again.

"Can this be called a drive shaft? There are hidden flaws in the middle, and that's where the problem lies."

The Master of Ingenuity, with a look of disdain, returned to the construction scaffold and said to the workers and technicians who were stretching their necks, waiting for his teachings: "Who is responsible for producing such a garbage drive shaft?"

Including Li Huaxing, everyone's gaze fell on a technician in a gray work uniform.

They had already placed unconditional trust in the Master of Ingenuity's abilities. To be able to identify hidden flaws in the main shaft with just a crowbar was a divine skill.

"Boss... I..." The young technician's face turned red, stammering, "The precision of the drive shaft... is... fine, I can guarantee it."

"Every step of the workers' operations strictly follows the production procedures, the precision... is... fine."

"Master Qiao!" Chief Engineer Wang Caiqi, scratching his silver-gray hair, was equally puzzled, "If the precision of the main shaft is insufficient, it should have seized up and not moved at all, but it clearly ran for over ten kilometers."

"Your precision requirements are so low that they make me despair..." The Master of Ingenuity shook his head.

"But the problem is not with the precision, even though it only meets the minimum requirement to move."

"The material used is too poor, the processing technique is too poor, and the quenching is too poor." The Master of Ingenuity touched the drive shaft. "The DC motor in the center of the drive shaft generates heat during operation, causing slight thermal expansion of the drive shaft."

"You definitely didn't calculate the thermal expansion coefficient of the main shaft, and you also overestimated the quality of this DC motor."

Thermal... thermal expansion coefficient...

Chief Engineer Wang Caiqi was struck like lightning, his body trembling violently, more excited than a cultivator who had suddenly enlightened.

A word woke the dreamer!

No wonder everything was normal at startup, but the seizure occurred after running for over ten kilometers.

When they brought the mining truck back to the workshop and disassembled it for study, the temperature of the drive shaft had already cooled down, so no precision error could be measured.

When producing the 190-ton mining truck, they had directly purchased mature foreign technology, and this problem had never appeared.

For the independently developed 240-ton truck, the material of the main shaft was the same as that of the 190-ton truck, so the culprit must be the DC motor.

As long as they worked on the cooling of the DC motor, the seizure problem could be solved.

So that's how it is, so that's how it is.

Large mining trucks are powered by an engine that drives a generator, which then produces a large amount of electricity to drive the DC motor on the rear axle.

The DC motor of the 190-ton mining truck and the 240-ton mining truck must be two different designs.

So they just need to redesign the DC motor...

How to design it...

Chief Engineer Wang Caiqi was about to scratch his head in frustration, but his hand, just touching his hair, suddenly dropped to slap his thigh.

A world-class master was right in front of him, and he was still thinking of designing a motor himself...

Ha ha~

Only his chairman would have to bleed a lot this time!

...