Let’s not talk about the quality of the steel. Even with the help of wire cutting and without physical reference, we can’t achieve the same accuracy as others, and we can’t even use a mere watch.

However, I have memorized the principles and drawings very well.

Then, a few young people retreated to the next best thing, and finally retreated step by step to the structure of the current knife, and finally managed to make a qualified and reliable knife.

Seeing that Shi Tong was enjoying himself, Su You smiled and said: "The blade hasn't been processed yet and its hardness is not good enough. Don't break it!"

He took the knife, disassembled it, and said to Shi Tong: "To keep the pattern from deforming, it cannot be forged anymore. The blade is clamped on a vise and processed with a file. After processing, it is put into the furnace, quenched, and then

Finely ground, pickled to create patterns, and finally sharpened. Don’t forget the equipment, carved with silver.”

Thinking about the setbacks he and the young man from the hardware factory had suffered, Su You smiled slyly and said: "Tomorrow I will give you another set of drawings. Hey, hey, if you can process that knife, I will give you a better one."

Its design is the best in the world!"

Back in the room, Su You threw himself on the drawing and started drawing.

Mechanical principles is a discipline that specializes in studying the structure and movement of mechanisms in machinery, as well as the structure, force, mass and movement of machines.

The main components of this discipline are mechanics and mechanical dynamics.

The research content is mainly to determine the true motion law and its adjustment of the machine under the action of known forces, friction and mechanical efficiency, and the balance of inertial forces.

Advanced folding knives, especially straight jumps and side jumps, are actually exquisite applications of mechanical principles and involve too much knowledge.

At the same time, this is also in line with one of the details of the future theoretical program outlined by Su You himself.

Side-jump folding knives are easier to handle. They use the two bevels of the blade and the back lock to form a certain degree of redundancy. Even if there is wear and tear in the future, the two bevels can automatically continue to fit tightly, so that the blade is fixed and will not shake.

However, due to the limitation of its working principle, the straight jumping knife must require a certain amount of movement space for the blade to slide, so it will bring a huge flaw.

Even high-priced luxury brands cannot completely eliminate the slight shaking of the blade after the blade is ejected and locked, and can only control tolerances with extremely high precision.

It wasn't until the famous Italian deadlok straight jumping knife was born that the world had the first straight jumping knife with an exquisite locking structure that could completely eliminate blade shaking. It was a major breakthrough and technological innovation in the industry.

The cutting head of the advanced jump knife is designed with a clock-level precision pawl mechanical structure, which uses two springs. When the knife is put away, gently push the mechanism toward the head of the handle, and the spring will generate elastic force to pop out the blade. It needs to be put away.

When you push the mechanism backward, the pawl changes direction, and the elastic force becomes pulling force, and the blade can be retracted. The effect is very magical.

After suffering a shameful failure that year, Su You kept this drawing and took it out to look at from time to time. He was in awe of human wisdom in mechanical design.

Now, he plans to spend a week slowly drawing out the drawings, because the various components are so delicate.

There are small pawls, small steel balls, small circlips, exquisite bearings, springs, perfect mechanical design, power structure, locking devices...

Before the micrometer came out, this jumping knife could only stay on the drawing board, but it was enough to become the ultimate goal of Shi Tong, a good disciple.

After thinking about it, I felt that the difficulty was too great. I was afraid of damaging my good disciple's confidence, so I took out another drawing and drew another one.

This one is much simpler, even simpler than the side jump developed today. It only has a more exquisite quick-opening fin designed on the blade head, which is much smaller than the quick-opening fin of the first generation imitation fat back guard.

When the knife is put away, only a small protrusion is exposed on the handle head, coupled with the back lock, it is a perfect folding knife.

However, in order to realize the function of pulling the knife into place easily with one hand, or to throw the blade out gracefully, another small piece of machinery is involved, the ball bearing.

Even if the diameter of the bearing is eight millimeters and the balls are as small as 0.5 millimeters, about ten will be used.

Similarly, Su You did not expect Shi Tong to be able to produce such fine balls.

Even if the four major families join forces and even add their own research and development of jade porcelain, four cups can theoretically support tens of thousands of kilograms of things, greatly reducing the difficulty of material production, and they may not be able to create such fine ceramic ball bearings.

But this doesn't stop him from drawing pictures, inner ring, outer ring, retainer, balls, it's done, don't make it too simple.

After finishing the drawing, clap your hands and go to sleep!

When I got up in the morning, I brought the drawings to Shi Tong and said, "Come on, come on, I'll give you a surprise."

Shi Tong wiped his hands and walked quickly: "Master is here, and I also have a surprise for Master."

After saying the treasure offering, a polished short knife is usually presented.

This is a sheathed dagger style. The handle is white with interlaced fine textures. The end of the handle is carved into the shape of a lotus bud. The soft curve of the handle is embossed with lotus leaves and leaf stems, as well as delicate diamond-shaped water.

Corrugations not only increase the appearance but also increase the friction.

"Fuck! Ivory!"

The blade is made of brass that was developed yesterday. It is in the shape of water waves. The water plant part also has some hollow craftsmanship. A spreading-winged crane cast in silver takes up half of the area.

The scabbard is also carved entirely from ivory. The bottom and close to the handle are made of rocks from both sides of the river. In the middle is a rhombus-shaped water wave that is integrated with the handle. There is also a small boat embossed on one side.

Pulling out the knife, the blade with dense feather patterns is in the shape of a dagger. The feather veins extend straight from the handle to the tip of the sword, dividing the dagger into two along the spine. The patterns are evenly distributed like a fountain erupting from the handle.

On both sides of the dagger.

Close to the edge, a blade line with a width of only two millimeters was cut out. The entire sword body was dark, except for this circle of blade lines, which was smooth and delicate, polished into a bright mirror surface.

Su You grabbed Shi Tong's arm and found that the hair on his hands had long been burned away by the boy's long-term iron work.

Shi Tong grinned again: "Master is really an expert!"

After saying that, he lifted up his trouser legs: "Just try! I left a leg specially for you, the old man!"

Su You was not polite and used his dagger to shave Shi Tong's leg. A strip of flesh-colored skin two fingers wide appeared, and the leg hair on it was shaved clean.

He took the fine silk, wiped the dagger clean, and inserted it into the sheath. Shi Tong also equipped the dagger with a beautifully decorated red sandalwood seat with holes on it, and the dagger could be inserted upright into the hole with the sheath attached.

After inserting the sword, Su You looked at it from side to side: "Okay! It's so beautiful!"

Shi Tong chuckled and said: "The rare magic weapon is just that, right? I tried it with Xixia's Qingfeng sword, hehehe, it's vulnerable!"

Su You sighed: "It is indeed a magic weapon, but it can only be placed on the desks of literati for them to cut paper and ink."

Shi Tong also sighed: "Yes, I can only follow the general to guard the border and drink Hu's blood."

Both of them were speechless and watched in silence for a while. Su You suddenly thought of a question: "How about giving this sword to your sister-in-law?"

Shi Tong jumped up in fright: "How can that be done! This dagger is going to be sold to someone who is taken advantage of! My aunt is only over five years old and cannot play with such a precious thing."

Su You looked at him with disdain: "How much did you say you spent?"

Shi Tong murmured: "Well... not counting cloud steel, master's ingenuity, brass, feather pattern cloud steel, just counting ivory and red sandalwood, it's almost... four strings."

Su You asked: "How much are you prepared to sell?"

Shi Tong took out a contract from his arms: "Master, I have inquired about it. If you improve the Chengjia Movable Type Bookshop and the Shijia Porcelain Shop, you will own 30% of the shares. Just because of the feather pattern cloud steel you made, at least

It’s worth this amount. If you sign this contract, from now on, you will have 30% of the shares in the Shijia Iron Shop.”

Su You was not polite and signed it casually.

Shi Tong then breathed a sigh of relief: "Hey, hey, hey, if this sword is sold, I will give it to you if it is missing eight hundred swords! In this way, master, you can also get more than two hundred swords, and give it to my sister-in-law, too

Isn’t it a pity?”

Su You stared at his little eyes: "I don't even bother to tease you for your scheming. The most important thing when giving a gift is your intention. I designed that folding knife myself. How could I exchange it for your ivory dagger?"

How is the knife doing?"
Chapter completed!