Back to the 80s Machinery Factory

Chapter 493 Calm down, you're only a freshman.
Throughout the morning, the practical training at the vocational school proceeded smoothly with the help of these "new cards".

In the next few days,

Zhang Nan then took the improved process training cards and visited several partner technical schools, delivering the cards to each of the practical workshops.

After reviewing the materials, the supervising teachers and students from various schools generally gave positive feedback.

Although there were some suggestions.

However, these are mostly operational details such as field order, terminology, and whitespace, and do not conflict much with the main structure of the card.

As everyone filled out and revised the cards, the process training cards were continuously improved.

Finally, Zhang Nan placed a complete "General Training Process Card" on Chen Luyang's desk.

"General training process card, final draft"

He rubbed his neck, looking exhausted: "Xiao Chen, I don't really understand, what's your purpose in making this craft card?"

Logically speaking, the project process is now running smoothly, and the practical training can be carried out, so it's not like we can't get the job done without this thing.

But Chen Luyang insisted on making such a thick and complicated little piece of paper.
It still needs to be written and signed...

What's the point of all this?

Chen Luyang's expression became unusually serious.

"Senior brother, the card itself is not important."

"The key is that behind every column and every cell on this paper is someone who has used it, someone who has spoken about it, and someone who has written about it."

“These things may be seen as static tables by others, but to us, they are an extension of production and a record of teaching.”

"In the realm of philosophy, this is called the path of practical transformation through the combination of institutions and tools."

In the realm of economics, this is called the information transmission medium and collaborative coordination mechanism in the production process;

"In the context of mechanics, this is called parameter verification of operational actions and closed-loop traceability of the process chain."

"In the field of education, this is called the work-study integration on-site recording mechanism - a preliminary exploration of the cross-school collaboration paradigm based on practical training process cards."

Damn it...

Zhang Nan was completely dumbfounded.

"Xiao Chen, you can make so many claims about this card?"

"Of course!"

Chen Luyang had an expression that suggested he was hiding his achievements and fame.

"So, if we work so hard and don't make ourselves some impressive titles, who will be able to tell how much meticulous work we've done behind the scenes when we give our results?"

"Although many times, we have to dedicate ourselves silently."

"But more often than not, we can't be unsung heroes!"

Zhang Nan couldn't help but say, "So you're writing your own praise speech in advance?"

"More or less~" Chen Luyang calculated it perfectly.

"We can't let people think that this project is just about drawing a few diagrams and making a few parts."

"That would be such a loss!"

"These phrases can be used for everything, from writing year-end summary reports, award evaluations, project approvals, to displaying achievements!"

"At worst, you can use it as a thesis topic and submit it to multiple journals to publish several short papers!"

Seeing that Chen Luyang's gaze was becoming more and more profound as she spoke, Zhang Nan couldn't listen anymore.

"Okay, okay, okay,"

Zhang Nan waved her hand, interrupting him with a wry smile.

"Take it easy, or I'm afraid you'll end up writing the process card into your graduation thesis."

"That's impossible to say."

Chen Luyang's eyes lit up, and she began to imagine the future!
"This card of mine is a comprehensive collection of five elements: practical materials, teaching samples, system templates, teacher-student collaboration records, and on-site feedback tools!"

"It can also be used to support research, conduct small dataset analysis, trend analysis, and node evaluation."

"Forget about writing a graduation thesis, you could easily write a doctoral dissertation!"

"No, buddy, calm down."

Zhang Nan couldn't help but emphasize reality.

"You're only a freshman now."

Chen Luyang proudly stated, "I'm planning my academic career ahead of time."

Zhang Nan really didn't want to listen to his bragging anymore.

"Alright, alright, Academic Life, you should go back to your dorm and get some sleep. I still have to draw some blueprints."

"Alright! You get back to working on the blueprints."

Chen Luyang slammed the card on the table with great enthusiasm.

"But when you finish drawing that coupling sleeve diagram, remember to sign it."

"We included a 'Designer's Signature' section on the card, just for you!"

"Make sure the signature looks nice when you sign it."

Zhang Nan: "..."

Over the next few days, the six technical schools successively completed the processing of the prototype parts and uniformly packaged the samples and supporting materials and sent them back to the repair shop.

To ensure the quality of this batch of prototypes, Chen Luyang arranged an inspection process well in advance.

Each prototype must be equipped with three things:

A process training card records the specific processing steps and the operator's signature;
A dimensional inspection sheet is filled out by the instructor, with key data such as tolerances, hole positions, and threads filled in item by item.

A numbered label indicates the school, class, batch, and job category.

On the first floor of the repair shop, the inspection work is in full swing.

Zhang Guoqiang, Tan Songren, Liu Kangwen, and Zuo Zhuo, several masters, were stationed at the tooling platform, each referring to the drawings and using calipers and micrometers to remeasure each piece.

Lin Qiming was responsible for registering and recording the information.

After the last prototype is completed and re-inspected,

Lin Qiming flipped through the register in his hand, handed the data to Chen Luyang, and said:
"The pass rates of the six technical schools ranged from 82% to 94%. The nozzle test pieces had the most problems with the through-hole fit; the wiring accuracy of many ignition coil modules was too low."

"However, overall, the test pieces from four schools have reached the assembly state, and although there are slight batch errors in the remaining two schools, it does not affect their use as teaching samples."

This result is acceptable!

Quite good!

Looking at the notebook Lin Qiming handed over, Chen Luyang let out a heavy sigh.

These students are not experienced workers in regular factories, and the machine tools are just teaching equipment in technical schools.

Being able to control the error to ±0.2 millimeters is already a result that far exceeds his expectations.

only……

Chen Luyang turned her gaze to the few test products on the list that exceeded the error standard.

Failure is not terrible, and wasting materials is not so terrible either.

The most terrifying thing is not knowing where you went wrong!

"Brother Lin, pick out these failed test pieces that exceeded the error limit, find their process card numbers, and let's compare and see why!"

"it is good!"

Lin Qiming responded, immediately picked up his pen to mark the corresponding process cards, and then took out and put them away.
The two then took the number and headed straight for the archives on the second floor.

At this time, the ping-pong table on the second floor of the repair shop had long since been transformed from a temporary dining table into a data processing area.

In the center of the table, process cards, inspection sheets, and serial numbers from six technical schools were neatly stacked and filed according to school and type of prototype. Beside the table, senior students from the Department of Mechanics at Peking University were checking, registering, and classifying them one by one.

Meanwhile, Ma Jin and Guo Anli from the Economics Department were also busy among them, with stacks of cards and data in their hands.

Accepting prototypes and compiling process cards is a very labor-intensive task.

Repair shops already have limited manpower.
In order to better complete the work,
Chen Luyang decided to go all the way and summoned Ma Jin and Guo Anli as well.

Anyway, they were assigned by the department to help them prepare materials and write reports.

Writing anything is still writing.
Whatever you do, you're still doing it!
We're family, after all.

It's good to get familiar with the work environment as soon as possible.

But to Chen Luyang's surprise, the two of them were actually very happy to hear that they were coming to the repair shop!

Especially Ma Jin!
They had heard about Chen Luyang's repair shop before, but had never had the chance to visit it in person.

Now we finally have the opportunity to get up close and personal with actual production units.
Without saying a word, the two of them ran over with their backpacks on.

"Senior, there are a few failed parts downstairs. I want to find their process cards and see where the problem lies."

After Chen Luyang explained his purpose, Ma Jin and Guo Anli immediately got to work and quickly found the corresponding cards.

Not only were those failed process cards found,
The two also picked out a few cards from the same parts that were made well, and lined them up neatly in a row.

After carefully comparing the rows of craft cards on the table, Chen Luyang couldn't help but tap the table.

"Now we've found the problem!"

Chen Luyang pulled out a card, raised his hand and waved it, saying:

"Both are nozzle orifices that are too large."

"The card from the second technical school states that the tail section enlargement uses a two-step tooling process, with the measuring tool referring to the internal calibration part."

What is an internal calibration file?

"The internal calibration parts are components they made themselves previously."

"If you use it to measure new parts, and it has its own errors, then everything made afterward will be wrong!"

"and this!"

Chen Luyang pulled out another failed craft card, which read:
The through hole was enlarged to 17.8 after machining. No test fitting was performed before delivery.

"It would be strange if something like this didn't happen!"

"The process is based on dimensions, but these dimensions cannot be measured by a ruler alone."

"You dare to deliver the parts without testing the tightness with standard parts? What if they're too big or too small? What will you use to cover that?"

Ma Jin and Guo Anli did not understand how to operate a lathe.

Chen Luyang said excitedly from the side, while they listened quietly.
at last!

Chen Luyang picked up the process card for the successfully produced prototype.

"That's why the part from the First Technical School was completed!"

Chen Luyang held up the card and patted it on the table:
“Look at what he wrote: Pre-drill through holes to 17.2, semi-finish turn to 17.7, then stop the machine to test fit the pin gauge; if it is loose, back up and adjust; after passing, fine enlarge to 17.82±0.02, and uniformly check with 17.8 pin gauge.”

"Three cutting processes, two trial fittings, and one verification; there are standards, margins, and logic."

"It would be unreasonable for this not to succeed!!!"

"And these pictures of the nozzles too!"

"On the failed card, the steps for hole enlargement were not detailed at all; it only said 'hole enlargement'."

"How much expansion? How many cuts? Should we try a different fit? Not a single word was written."

"But the successful ones all clearly stated '17.2 pre-drilling, 17.7 roughing, 17.82 fine reaming'..."

"Isn't this blatantly telling us?"

“Every craft that is successfully completed has a traceable path; anything done poorly is either skipping steps or being done half-heartedly.”

was saying,

Chen Luyang suddenly gathered the good cards together and turned to look at Ma Jin, who was still recording data:

"Senior brother, I've been thinking about something."

"Could we take out all the steps for each successful card and compare them?"

"If they are all using the three-stage hole enlargement method, then let's extract this method, write it as an example, and include it with the next batch of drawings."

"Stop writing up processes randomly, just follow this procedure."

After listening, Ma Jin thought for a moment, nodded, and said:
"Junior Brother Chen, are you planning to use process cards as a template to build a standardized process flow framework?"

"To ensure that the six technical schools use the same technological language, follow the same step-by-step logic, and use the same verification standards,"

"Establish a reproducible, traceable, and transferable operational system,"

"This will enable the standardized modular construction of general-purpose component production and the cross-school collaborative verification mechanism?"

Damn it? !
After listening to Ma Jin's words,

Chen Luyang, who had been leaning against the table with her elbows crossed, suddenly jumped up from her chair!
He stared intently at Ma Jin's face, his eyes filled with amazement and admiration!

This Brother Ma is definitely my long-lost half-brother!

How could he?!
How could he be so precise in every word he uttered?

Poke! Strike! At! the! very! tip! of! his! heart!

Chen Luyang stood by the table, her eyes shining brightly.

The moment Ma Jin uttered that "bombardment of terminology," he instantly refined the scattered and vague ideas in his mind into a systematic framework.

Previously, all he was thinking about was "not making any more mistakes" and "being able to follow the instructions."

But Ma Jin elevated this "follow the example" logic into a whole methodology of "extracting universal rules from experience"!
This is on a completely different level from simply coming up with a template and sending it to a vocational school!

"So I took a shortcut?" Chen Luyang asked with a chuckle.

Ma Jin smiled and said casually, "It's not a shortcut; we're more like feeling our way across the river."

Chen Luyang asked curiously, "How so?"

Guo Anli picked up the thread: "You're essentially looking at the results first and then working backwards to find the successful methods and summarize the general approach."

"This logic is quite similar to 'minimum path dependence,' which is the 'shortest path method' we learned in our freshman year."

"But the content learned in the third year is different."

He slapped several cards together and pointed to the process fields on the paper:

“Look at these, each process can actually be understood as an ‘operational decision’, which determines an ‘outcome variable’.”

“If we extract the card fields, organize them into structured data, and then add a ‘qualified’ or ‘unqualified’ label to each card, we can run a multivariate discriminant analysis model.”

Chen Luyang was taken aback for a moment, then tentatively asked, "Does it mean you got some multiple-choice questions right?"

Ma Jin laughed: "Pretty much."

"But this isn't about 'selecting,' it's about 'matching.' Matching process combinations."

"For example, the hole enlargement method, trial fitting steps, and chamfering sequence—if these three variables appear in a certain specific combination, we find that the success rate is particularly high."

"A combination of 'A+B+C', such as hole enlargement in method A, trial fitting, and standardized chamfering sequence, can achieve a success rate of over 80%. We can call this a 'high-quality combination'."

Guo Anli continued, "On the other hand, if a card is produced without any problems this time, but it uses the 'D+E+F' combination, then it means that it has taken a 'high-risk path'."

"We can mark it in advance and remind vocational schools to pay attention: although this method didn't fail this time, it's not very reliable."

"Once this model is built, we will be able to give each card a 'process combination score'."

"High scores indicate a mature and reliable approach; low scores indicate a combination that is prone to making mistakes."

He paused here, softening his tone:
"But that doesn't mean a low score necessarily means failure."

(End of this chapter)