Chapter 109

"Ah? What a thick piece of wood? This is really a bit difficult... "In the face of the guardian's request, old wood also has a sad face.

If the guardian wants a thinner piece of wood, it's OK to say, but his mouth is a thick piece of wood that three people embrace. This requirement is not old wood. Even the whole gaoshu tribe is very difficult.

"What? Isn't it difficult? " Asked the stone bear.

"It's not the difficulty, but the time you ask." Old wood says helplessly.

If the guardian doesn't ask for time, it's not difficult to deal with a big tree slowly. It takes two or three days to cut it slowly. When the tribe made the wooden boat for crossing the river, it was this method that slowly put down a big tree.

It's not a lie. In the past, there were no iron tools in the tribe. They used to cut trees with stone axes. More than ten people took turns to work. It took at least two or three days to cut down such a thick tree.

But the guardian wants to have such a big tree in one day. It's very difficult.

"Don't you have the tools?" Seeing the ugly face of old wood, the stone bear knows where the problem is.

Three people embrace a big tree with a diameter at breast height of about one and a half meters. In the absence of a large-scale saw used by two people, it is not generally difficult to cut down such a big tree in one day.

At least with an axe, I'm afraid we can't finish the work.

Although it's easy to chop a tree with a diameter at breast height of 20-30 cm with an axe, it's no less difficult to chop such a thick tree than to plow dozens of mu of land continuously with a curved plow.

If you want to use an axe to dry down such a thick tree, you may not even be able to cut half of it, so the axe will have to be sharpened.

Old wood took a long breath and nodded quickly, "yes, guardian, we don't have the right tools to deal with such a big tree. We can only grind it bit by bit with an axe. If you want to dry down such a big tree, it will take at least two or three days to chop it with an axe. After cutting down the big tree, it will take at least another day or two to chop off the extra branches. We can't finish the work in one day

The stone bear nodded, then thought about it and said, "you all follow me. I'm going to make you a large saw. With this thing, the tree that three people hold can be cut down in two hours. "

"Big saw? Is it a big saw similar to the hand saw? "

"It's not the same. This kind of saw is much bigger and needs two people to use. It's specially used for dealing with thick trees or thick wood. With this, it will be easier to cut trees later. Let's go. Call the planer. I need his help

Old wood turned and yelled at a granddaughter. The little girl ran out to call her uncle.

When the stone bear took the old wood to the open space in the center of the tribe, it happened that lieutenant Ferguson took the hard bone. They were melting a pot of molten iron with a kaolin clay crucible. They wanted to make a new barrel for experiment.

It's better to rush early than to rush skillfully, so with a wave of the stone bear's hand, the hot metal that has just been ignited for smelting becomes the stone bear's.

It made Lieutenant Ferguson very unhappy.

But what's the way to be dissatisfied? It's shameless to catch up with the boss. He can only bear it.

It will take a long time to melt this pot of hot metal. This time is just right for the stone bear to make a mold.

If you want to make that kind of double lifting woodworking saw, it is obviously impossible to expect to knock it out with a hammer. The best way is to cast it. In any case, the requirements for serrations of this double lifting saw are not so fine, and the casting method is the most suitable for making this kind of saw.

Wood plane and cross saw, the two sons of wood with their son bow drill and chisel soon came. They were busy making salt in xiaoyanshan.

With the addition of so many new forces, the mold was quickly made.

This is a long iron mould with a length of two and a half meters, a width of more than 30 centimeters and a thickness of about half centimeters. One side of the iron sheet is flat, and the other side has nearly three centimeters of serrations.

After the mold is finished, it starts to be calcined. Anyway, it's too late to dry in the shade, so it's better to heat it directly.

When the pot of molten iron over there melted, the mold here was almost baked. The wood planer took the iron ladle and poured the molten iron into the mold.

Because the mold is very thin, it cools very fast. More than an hour later, the two and a half meter long double lift saw came out fresh.

Because the medium carbon steel is used, the toughness of this big saw is quite good. However, the big saw is far from complete. There are two most tedious tasks. One is to quench the saw teeth to increase the hardness of the saw teeth; The other is cutting the saw teeth.

These two jobs are very cumbersome, especially to the sawtooth cutting, in the current situation of no electric grinding, can only rely on manual cutting bit by bit.

Ferguson had seen such a big saw. At first, he thought that the boss was eager to rob himself of a pot of hot metal to do something important. In the end, in order to get such a big saw, he could only shake his head helplessly to show that the boss was unreasonable.

Stone bear didn't want to comfort Lieutenant Ferguson. He just wanted to get the big saw out quickly, and then cut down a big tree thick enough to make an old wedge oil press.

It's also a troublesome thing to quench the saw teeth. After all, the saw is too long, and the quenching part is only limited to the saw teeth, so this work is not only troublesome, but also difficult.

But it's hard for the stone bear. Although the stone bear has never done this kind of work, he still has wooden planers around him.

There are three cobblers and one Zhuge Liang. There are several people around the stone bear, and there is also a second lieutenant Ferguson. After a little sum up, a plan to quench the serrations came out.

For this reason, the stone bear once again occupied the stove, but the top was sealed with kaolin, leaving only a gap about 5cm wide. After the stove was lit, the wind box was used to blow in, so that the flame would come out through the gap.

Put the serrated part of the big saw in the gap, and then quench it after the flame turns this serrated part red.

Although this kind of work can only be done section by section because of the small stove, the two and a half meter long sawtooth can be quenched completely by doing it several times.

For this reason, Second Lieutenant Ferguson had to put down his work and help the boss with the big saw.

Several people worked hard all afternoon, and the saw with hardened teeth was completely completed. As for cutting edge, it's very complicated, but it's nothing for the old wood family. No matter old wood, his two sons or his two grandsons can do this kind of work.

If five men go to battle together, they can finish cutting the blade of this saw in one night!