The family was having breakfast, and the whole family in Lishan got up early, to be precise, all the villagers in Lishan got up early.

At this time, His Majesty was on vacation in Lishan for summer vacation, and the emperor would ask a word or two about important matters in the court, and then hand it over to the prince to supervise, and Fang Xiang and Zhao Guogong would preside over it.

The emperor's vacation life is basically like this, it is rare to get up early in the morning, and generally wait for everyone to eat breakfast, and the morning sun is on the three poles, and then he will come to the mountain to eat.

"Brother Huang, hasn't the steam engine been built yet?" Li Zhi and Gao Yang were very curious.

"Well, if you have some problems, come to my brother-in-law." Li Tai took a bowl of porridge from his aunt and asked his guards to hand over a large piece of iron while eating.

This iron is cylindrical in shape, with large ends and a slender middle, which looks more like a barbell when you look closely.

The aunt handed over a stack of cakes, "This is the cake made by Xinmai this year, His Royal Highness King Wei will eat more." ”

"Uh-huh, Aunt Xie." Li Tai said as he ate something in his mouth.

Zhang Yang took the barbell-like object, "This is what you use to make an air valve." ”

Li Tai nodded and took out another drawing, "This is the air valve in the inner cavity of the steam engine, I thought it was successful at first, but then I found that it was always plugged." ”

Now we are one step away from the completion of the steam engine, and the overall framework is already there, but the details are the problem.

Some details are fatal, and once the important details are not done, the steam engine cannot be completed.

Zhang Yang looked at the valve, which was placed in the cavity of the valve, and the steam pushed the barbell to move.

When the air pressure from one end enters, it moves to the other end, and vice versa.

In this way, the object can move left and right under the action of steam power, which is the key to the conversion of steam motor energy.

Zhang Yang walked into the workshop with the parts and drawings, and as he spoke, Li Tai smeared some bean sauce and meat sauce on the cake and hurriedly followed the footsteps and went to the workshop.

The sun has not yet reached this end of Lishan, and the workshop is still a little dim.

When I opened the door of the workshop, there was a slight fog entering the workshop from outside.

When the wind blew, it looked cold, and Li Tai made a swing, "I didn't expect the morning on the mountain to be so cold." ”

Zhang Yang lit the fuel lamp in the workshop, spread out the drawings, and frowned: "How is it blocked?" ”

Li Tai put some objects on the table and demonstrated, "When we open the inner cavity, this thing will stop moving on the side, if it doesn't turn off the fire and cool down, maybe it will explode again." ”

Judging from the drawings, the inner cavity of Li Tai's steam engine is rectangular.

Although the appearance of this steam engine looks very different from that of later generations, and it is very large, like a house.

After all, Li Tai started from scratch, from theory to practice, and was busy for three years.

It took two years to make the spring just after opening Lishan.

Because of the springs, Lishan got fine iron.

After that, it took another year, and now there is a steam engine called Li Tai.

In a total of five years, there were only these three initial achievements in Lishan's industry, and the third steam engine had not yet succeeded.

Zhang Yang also felt that his direction was right, and he was also worried that the technology tree was crooked.

But the result is the result, and it is not in vain if it can be made.

Taking down the two iron plates from the cabinet, Zhang Yang demonstrated them, bringing the barbell-style air valve close to the iron plate, and then fitting them together tightly, "Is that so?" ”

Li Tai nodded, "That's how it was when the inner cavity was opened. ”

"Well, I'll think about it." Zhang Yang sat down and looked at the position where the air valve and the iron plate fit, and suddenly thought of something, similar parts related to bearing combinations need the same process.

This process is called chamfering, and the presence of chamfering can not only be used to protect the parts, but also to increase the service life of the specific object and improve the use experience.

If there is no chamfering, because these sharp edges and corners will make it conform to the iron plate, so that the internal air pressure will not have a point of force.

The angle of this chamfer should be larger, Zhang Yang picked up the air valve and put it on his lathe, fixed it with a clamp, and then tightened it with a wrench.

Li Tai was curious: "Brother-in-law, what are you doing?" ”

Zhang Yang frowned and said, "Make a chamfer and come out." ”

Although Lishan's casting process is good, there are still many technical bottlenecks in other specific processes, such as arc-shaped grinding, which requires the use of lathes, unless you have the patience to polish such a high strength of fine iron.

Zhang Yang took off the flywheel on the lathe, replaced the original flywheel with this air valve made of fine iron, and then fixed it with rivets.

Then use an iron pestle to clamp the other end, step on the pedal under the lathe, the belt drives the bearing to rotate, and even the originally fixed air valve also begins to rotate, and then uses a wooden board to block one side of the blade, seeing Li Tai looking at it curiously, Zhang Yang hurriedly said: "His Royal Highness the King of Wei stand farther away." ”

Hearing this, Li Tai took a step back.

Feeling the foot on the pedal more and more difficult, the belt drive wheel turns, and the speed increases more and more until it reaches a certain speed.

"Trouble His Royal Highness King Wei to bring the kettle on the side."

Li Tai nodded when he heard this, but saw his father also walk in.

Zhang Yang grabbed the handle on the side of the lathe and pushed it, so that when the blade was close to the corner of the rotating "barbell", sparks came out and there was a screeching sound.

"Pour water and pour it on the knife."

Hearing the words, Li Tai hurriedly poured the water in the kettle, and as the cutting continued, the water in the kettle was poured on the knife.

Li Shimin has been standing in the rear, carefully observing the lathe.

It was only half a pillar of incense, and the blade broke, but fortunately, the lathe was equipped with a baffle, and the broken blade pierced the wooden baffle and entered the wood for three points.

Zhang Yang let go of the pedal, the lathe stopped turning, and he relaxed his sore knees and thighs, and then noticed the emperor on the side.

"Your Majesty, when did you come?"

"I've been there since you started." Li Shimin was still surprised by the lathe in front of him with a dark face, "Is this what this thing is for?"

Zhang Yang simply picked up the small bench on the side and sat down to relax his thighs, "This is just one of the uses, I will modify it in the future, it will be better." ”

Li Shimin nodded again and said, "I have always admired people who have faith. ”

Li Tai observed the chamfer that had been cut in the lathe, "Is this okay?" ”

Zhang Yang raised his eyes and looked, "Not yet, the knife has already broken." ”

"Someone!" Li Tai shouted out the door, "Bring a few more knives." ”

What kind of knives can Li Tai's guards bring is nothing more than horizontal knives and daggers, daggers can be replaced, but the blades will be made very thin for the sake of lethality.

In this way, the tool used for cutting is not suitable.

"Brother-in-law, do you have a suitable one?"

Zhang Yang looked at the knives all over the ground, "The back of the dagger is still useful, I'll try it." ”

Reloading the knife, this time letting Li Tai's guards pedal, the bearings inside the lathe turned again.

Li Shimin drank tea and watched with interest, after all, it was a novelty, it was fresh and fun.

The blade of the dagger is fixed in a splint with the back of the knife slowly approaching the edge of the chamfer.

Zhang Yang slowly moved the blade, and Li Tai held the kettle to pour the water down, repeating the previous thing

"The speed is not enough, step faster."

Hearing this, the guard gritted his teeth and stepped harder, because this pedaling was connected to the belt, and the more he stepped on it, the harder it became, and the faster the rotation, he gritted his teeth and blushed.

After holding on for half a pillar of incense, the guard fell to the ground and stretched his thighs because of the sharp pain of sudden cramps.

Li Tai said again: "Replacement!" ”

"Whoa!"

Another guard was replaced, and he was also pedaling hard, and the cutting continued to emerge as the sparks kept coming out, and iron filings fell.

By the time the chamfering of one side was completed, five guards were already paralyzed.

Zhang Yang changed it to one side, "There is one more side to complete, hold on for another hour." ”

Hearing that there would be another hour, a group of guards turned blue, this work is really not done by people.

Li Shimin said in a deep voice: "The guards are also human beings and need to rest. ”

Li Tai now has the posture of going off, and the completion of the steam engine has reached the most critical point, so he is naturally in a hurry.

Only Li Shimin, who was leisurely watching the excitement on the side, picked up the drawings again, as if admiring a painting.

Li Zhi stepped on a skateboard and passed by the door of the workshop, and when he saw that his father and brother and brother-in-law were there, he also walked in, and he also showed an attitude of watching the excitement.

Li Lizhi came with a bowl of grapes, "Father, the grapes just picked today." ”

Several people sat down again, eating grapes.

Zhang Yang instructed, "This thing needs to be replaced from time to time, because it will rust, it is best to make a few more such parts, which can be replaced." ”

As long as the current technical problems can be solved, Li Tai will listen to his brother-in-law's arrangement.

Zhang Yang replaced the pedal and the cow belt in the lathe, since the lathe was built, it has not been used with such high intensity, and the cow belt is very seriously worn, and it will break if it is continued to be used.

After replacing the leather belt, take out a sliding box from the corner of the workshop and put the belt on the hub of the sliding box.

Li Shimin was talking to his daughter Li Liqing.

Li Tai looked at the drawings and pondered.

A group of guards collapsed on the ground.

Only Zhang Yang is still busy replacing wheels and belts.

There are only five cow belts that I have left, and the toughest cowhide on a cow is only on the back of the cow, and a cow can make a maximum of two such belts.

Every time I change it, I feel distressed.

Before, I installed a foot pedal to suit myself to use the lathe alone, just use both hands and feet.

Now that the intensity of use is so high, someone needs to cooperate.

The belts and wheels of the lathe were replaced, and Li Tai's guards also regained some strength.

Li Shimin watched from beginning to end, and I have to say that Zhang Yang's craftsmanship is really good, and he can create such things, but he Yan Liben may not have such attainments.

How much skill does this kid have in his stomach that he hasn't taken out.

An inconspicuous workshop can paralyze so many people.

The lathe turned again, and the guards pulled the wooden pole again and again, and with each pull, the force of the wheels in the lathe would pull back again, so that each pull would be more difficult, and the belt began to tighten more and more.

In order to make a better effort, for His Royal Highness the King of Wei to be able to build a steam engine, and for the three years of hard work and sweat not to be in vain, these guards took turns one by one, gritting their teeth and insisting on pulling the lever to let the inside of the lathe rotate.

He stepped on the side of the lathe with his feet, and the whole person lay on the ground, and pulled out the lever with both feet and knees, and it continued like this, not afraid that his back would wear out the skin on the ground.

Another hour passed, and it was noon, and the lever was pulled one last time to stop the lathe.

Zhang Yang took out the air valve that had been chamfered, "Try it again." ”

Li Tai held it in both hands, "This time it must be successful." ”

The five guards were tired and paralyzed again, this time three of their backs were frayed, one was flashing, and the rest was lying outside vomiting.

Making a part can be so miserable, Li Shimin was amazed.

Most of the lathe has been destroyed by such a high intensity, and Zhang Yang feels that it needs to be overhauled if it is to continue to be used.

Li Tai took out the unique vernier caliper of Lishan and checked the size, and after confirming that it was correct, he hurriedly left with its footsteps.

Several guards followed.

Li Shimin also followed out of curiosity.

Next to the blacksmith's workshop in Lishan, there is a tin house, which is a very large steam engine to be precise, and this steam engine has replaced parts back and forth many times, and has been tested many times, including the internal pipes.

This is the reason for the stagnation of Lishan's technology in the past three years, and it is also the reason why there has been no new thing in the past three years, Lishan has invested most of its material and manpower in this steam engine, Niu Chuang and others in addition to the usual maintenance of the assembly line in the village, but also most of the effort is used here, three years of technical hard work to create such a big guy.

Li Shimin was very confused at first sight when he saw this thing, he frowned and asked, "What is this thing for?" ”

Li Tai wiped the sweat from his forehead, and the air valve in the inner cavity was installed to confirm that the preparation was correct, and then explained: "This is the biggest achievement of Lishan, and the father is optimistic, and the Tang Dynasty is rich and strong in this move." ”

After that, the fuel compartment of the steam engine began to burn, and black smoke continued to come out of the chimney above, and everyone was looking forward to the water boiling inside, and when the second chimney above had white smoke coming out, Li Tai pulled the rope on the side, and the three chimneys smoked together.

A loud whistle sounded from the steam engine, which resounded through the four fields, causing the people around to stop their movements and look for sounds.

Everyone looked at the wheels at the front with bated breath, and after another hour of burning, there was a strange sound in the inner cavity, and another loud whistle.

At this moment, everyone stared at the wheel at the front end, until the wheel turned, and everyone cheered.

"Ahh Niu Chuang howled loudly with excitement.

Li Shimin stood in place very messy, he didn't know what they were excited about, they seemed to have done something terrible.

I don't understand what this is all about.

There were tears in everyone's eyes, three years, these three years have been too painful.

"Brother-in-law!" Li Tai shouted towards Lishan, ran all the way towards Lishan while wiping away his tears, and shouted loudly towards the mountain: "Brother-in-law! Brother-in-law! Brother-in-law......"