It is not difficult to make a screw, but it is time-consuming. Yang Wenli specially invited a carpenter with quite good skills from Zhoucheng, and the carpenter was also surnamed Yang. It is no wonder that Yang Wenli's ancestors originally moved from the state capital.

"Uncle clan, I invite you to come for nothing else, just planing out a wooden screw the thickness of a baby's arm, but my requirements are relatively high, and the wage is thirty percent higher than others, I don't know what you think?" After chatting, Yang Wenli expressed his intention to invite him.

"Virtuous nephew, our relatives are relatives, but I also have to say a word, of course you have nothing to say about your high salary, but you invited me here from all the way to the state city, just to plane a screw, just for half a day's work, isn't it too sorry for my foot money? It's not like I'm out of things to do in the city.

I don't want more, you can pay for three days, and I'll help you plane the screw and go back to the city. As soon as the carpenter heard Yang Wenli's words, he immediately became angry, so his tone was a little rushed. Anyone who encounters this has fire in their hearts, and it is no wonder that Carpenter Yang is angry.

"Uncle Clan, you misunderstood, don't talk about it for a long time, if you dig it out in a week, I'm thankful.

Don't look at it as just a screw, but my requirements are very high, and there can be no difference between the inside and outside, this is not an ordinary carpentry job, otherwise, my nephew I don't have to send someone to invite you from all the way to the state city, I want to be your good craft. Yang Wenli saw that the carpenter had misunderstood, and hurriedly explained.

"Really? That's my misunderstanding of my nephew, please forgive me! After listening to Yang Wenli's explanation, the carpenter also knew that he was wrong to blame him, so he sincerely apologized.

"It doesn't matter! It's that I didn't make it clear, and I was at fault in the first place. But Uncle Clan, don't be too troublesome! Don't worry, if you do one day's wages, I will still pay you 30% higher than the market price. ”

Seriously, Yang Wenli was really afraid that the carpenter would be troublesome and quit, so the ugly words came to the fore.

"That's not going to happen, I've also done fine work, Jingwangfu sometimes asks me to do some odd jobs, that's very demanding, but the wages are also high, I'm used to it." Carpenter Yang is an old fox, and his words vaguely reveal that as long as the wage is high, everything is negotiable.

"That's good, I don't care if the wage is high, I just need a screw that suits my heart, money is not a problem." Yang Wenli agreed to Yang Carpenter's request very boldly, for Yang Wenli, who was already able to fire bone china, he really didn't care about a few wages.

Carpenter Yang came all the way from the state city, and he also made preparations, came in the afternoon, stayed at Yang Wenli's house for one night, and started work the next morning.

In ancient times, they ate two meals, but the Yang family provided three meals, and the meals were big fish and meat.

On the afternoon of the third day, Carpenter Yang said to Yang Wenli: "Virtuous nephew, do you think it is qualified?" No, I'll change it again. ”

Yang Wenli is also serious enough, for this wood screw, he specially made a caliper, the purpose is to achieve the maximum precision.

He took out the calipers he was carrying with him and said, "Good! I'll measure it. ”

His caliper is not simple, it is a mountain version of the vernier caliper, of course, the scale may not be very standard, but the same scale is almost the same as the accuracy of the modern vernier caliper, and it is most suitable to use here.

He was suitable, but it hurt the carpenter, he measured two places casually, and said: "Uncle clan, this can't be done!" Lo and behold, there are several scales off!

In this way, I will put the calipers here, and you will revise the amount by yourself, and when you are qualified, you will tell me again. ”

"Ahh It's not up to par! I look quite round, and when you measure your caliper, there is really something wrong. Carpenter Yang was dumbfounded, and he realized that maybe this bowl of rice was really not delicious.

Yang carpenter fell into the pit, using carpentry planers to make logs, to meet the standard of vernier calipers, its difficulty is as difficult as embroidering with an iron rod, he was Yang Wenli took a good standard lesson.

At that time, there was no aluminum, and his vernier caliper was made of bronze, which was very stable and not easy to deform, so it was the most suitable for making a measuring stick.

The artificial extruder he designed uses the principle of leverage to exert a large enough force on the red-hot blade in the mold to make the iron more compact, produce physical changes, and become a higher atomic structure.

Of course, at the beginning, it was just planed into round wooden sticks, and when the round wooden sticks were qualified, Yang Wenli would ask Yang carpenter to carry out the next step of the thread engraving process.

The meticulous work was very time-consuming, and the carpenter Yang repaired it for another 5 years before finally making a suitable round wooden stick. He invited Yang Wenli to hand the caliper and said, "Virtuous nephew, you measure it and see if it is agreeable." ”

"Hmm" Yang Wenli responded and measured it, there are caliper specifications, this time the round wooden stick is finally qualified, so Yang Wenli said with a smile: "Uncle clan, not bad!" Roundness is no problem. I prepared a piece of paper with curved lines, you align it and stick it on the stick, and then change the line to carve the groove, the groove also requires the same depth and width, or use this caliper to measure, trouble you. ”

Yang Wenli's method was taught by the teacher in the extracurricular activity class of primary school students in later generations, which is very simple, but very useful, and is much more accurate than the carpenter himself carving grooves on the wooden stick without any specifications, and there is a caliper specification, which is not much different from the modern screw.

Yang Wenli doesn't read much, and the main reason for his family's poverty is not that he is stupid, on the contrary, his brain is very active, and he can't really think of using the screw made by simple principles to replace it with other reborns.

As soon as Yang Wenli threw away the new task, he ran away again. He knew that Carpenter Yang would not want to carve out threads for a while, he was an idle person, and he had nothing to do for the time being, so he personally took the teenagers to hunt in the mountains.

Hunting not only improves the family's food, but also trains the young family's actual combat ability. If it weren't for the fact that the sword hadn't been forged, he would have taken them to fight the bandits. This waiting time can be regarded as giving the bandits a chance to live a few more days.

……

"Each team member should be at least 10 meters apart from each other, and they should cover each other to minimize casualties.

Advance in a concave formation, protruding on both sides, concave in the middle, when suddenly meeting with the enemy, the two sides back to copy the tail, can make dumplings for the enemy, not let an enemy escape. While having lunch at the barbecue in the mountains, Yang Wenli used this time to give a tactical theory lesson to the family.

"Young master, what if you suddenly encounter the enemy on the side?" Yang Rentian put forward a hypothesis.

…… To be continued