Chapter 519 (1/2)
As for the special circumstances, it is necessary to poke the knife in. That is, the tip of the knife is responsible for breaking armour and opening the way, and the back blade is responsible for expanding the wound. They perform their respective duties. ” The old man said to Tianxing.
In fact, the design of many cutting tools is that even if the tip is broken or worn, other parts can also make enough sections to attack.
From a purely technical point of view, it is to control the angle of attack, control the strength of contact, and make good use of the blade and blade back for defense.
Fang Tianxing handed his long sky healthy qi sword to the old man and said respectfully: ”teacher Fu, can you help me see if there is any way to make the sword sharper? I have a strong enemy who practices some kind of method that is not bad. My sword can't stab him, please.”
The old man took the Changkong Zhengqi sword from Fang Tianxing, observed it carefully, tried to knock it, and listened to his voice.
The old man exclaimed: ”the material of this sword is the only one I've ever seen in my life. It's just that the sharpened blade is rough and crude. It's just that I've made a lot of money. The sharpness of this sword can only be achieved by regrinding it. It only needs a good grindstone to grind this kind of material, otherwise it will be very difficult to sharpen it. ”
”My friend has a piece of Jiulong stone, which should be the top grade of grinding sword.” Fang Tianxing said to the old man.
The old man said with admiration: ”that Jiulong stone and this sword are both supreme gods. They are only seen in my life. I have to see them in order to live a good life.”
Fang Tianxing immediately wrote a letter to Cui Chengjian and borrowed Jiulong stone from him.
Three days later, Fang Tianxing received the Jiulong stone from Cui Chengjian. He found the old man and saw the legendary Jiulong stone. The old man's calm face was moved.
Caressing Jiulong stone carefully, the excitement in his heart is beyond words. Through the momentum of his body, Fang Tianxing felt that he was an academician reader.
This kind of reader can be met or not. When he was young, he must have a very rich life and vast knowledge. Fang Tianxing, a famous figure in human society, was very interested.
As for making him a loyal reader, Fang Tianxing dare not even think about it. What he has done is not good enough, so he may not have such qualifications.
”When shall we begin to grind the blade, old man?” Fang Tianxing asked the old man.
”Don't worry. You'll learn the basic knowledge of sharpening swords these days, and then start sharpening in three days.” The old man said to Tianxing.
With more understanding of this knowledge, Fang Tianxing just thinks that it is a very troublesome thing. A good knife needs more maintenance. Only good maintenance can keep it sharp.
When it's used to cut. When the direction of the cutting edge is the same as that of the cutting edge, it is easier to cut and sharper. The micro serration of the edge of the blade is also helpful to improve the sharpness.
Burr will greatly increase the cutting resistance of the blade, which is an adverse factor affecting sharpness. A sharp blade should have no burr.
When sharpening, keep a constant angle, although it's not easy. Of course, practice makes perfect, so don't expect to do it well from the beginning.
Three days later, everything is ready. The old man lights incense on one side, which makes people feel calm“ You've learned a lot these days. You have to do it yourself. Only in this way can you be more familiar with the characteristics of the sword and it will be helpful to your swordsmanship. ” The old man said to Tianxing.