The great steward of Qin, who had corrupted customs, went to the artillery factory for a stroll, discussed with Chen Zhan for a while the technical problems of making cannons, and then slipped to the musket factory, where he and Li Xuejing gathered in front of a simple drilling machine, pointing and pointing, while writing and drawing with his latest invention of a quill pen.

The Ming Ordnance Bureau and the War Bureau of the Ming Dynasty made birds, the pass rate is often only two percent, the scrap rate is so large, there are two main reasons, one is because of the material problem, up to the size of the officials, down to the craftsmen most of them are cutting corners, iron refining is insufficient, naturally it is not easy to make a qualified barrel.

Second, because of the problem of the drilling machine, the drilling machine used today is too simple, and it depends on the vision and experience of skilled craftsmen to drill out the barrel, and it is impossible to achieve batch precision drilling.

The first thing Qin Chuan solves is the problem of drilling machines.

He wanted to make a primitive boring machine.

He did not come from a mechanical background, but he still understood the basic principles, and the most primitive boring machine was nothing more than a horizontal worktable, a shaft and workpiece clamp parallel to the worktable.

After spending the night at Li Xuejing's place, Qin Chuan drew a rough structural diagram of the boring machine.

When I went back to the yard and wanted to sleep, I found that the lights were on in the next room, and when I went in, I looked, hey, Wang Jizong lit the lamp and read at night.

Seeing Qin Chuan come in, Wang Jizong smiled bitterly.

Qin Chuan could probably guess what was going on, so he only patted him on the shoulder comfortingly, and then went back to his room to sleep.

The next morning, I wanted to visit Miss Wen, and by the way, I took this gentle and delicate woman to ride a horse to see the scenery, but Wang Jizong grabbed him and said that it was best to delay for a day or two, and wait for Miss Wen to slow down.

Qin Chuan thought about it too, and simply went to the musket factory.

As soon as he entered the courtyard, Li Xuejing ran over and said, "Chief steward, the triangular ruler and ruler you want have been built." ”

"Oh?"

When Qin Chuan heard this, he hurriedly walked in.

A blacksmith cautiously handed over two rulers.

Qin Chuan's results are not bad, the surface is smooth, the edges and corners are clear, the two sides of the ruler are drawn straight with ink fountain lines and then ground straight, and the rectangular ruler is a triangular ruler carved out of the hook three strands, four strings and five methods.

The two rulers have scales on them, which were carved by Qin Chuan according to the centimeters, centimeters, and millimeters in the measurements of the Ming Dynasty, combined with the centimeters and millimeters of later generations, and the blacksmith followed his words.

The scale of the two rulers made today is fine to the millimeter, and although the length deviates from the millimeters of later generations, what Qin Chuan wants is just a strict measurement standard, and it doesn't matter if it is the same as that of later generations.

No matter how delicate a ruler is, it is basically enough to have a millimeter.

After confirming that there was nothing wrong with the two rulers, Qin Chuan handed over the rulers to the blacksmith and asked them to make a batch of the same specifications as soon as possible.

The ruler is not only used to make boring machines, but all firearms and shells in Mengjiazhuang must also be manufactured according to strict standards in the future, and this big and small situation is not allowed.

With a ruler, Qin Chuan immediately began to make bearings.

Of course, it wasn't him who made it himself, but he was on the sidelines.

Two blacksmiths with the finest craftsmanship took a few apprentices to burn the furnace, and used the pig iron pouring method to smelt steel, that is, Suzhou steel, and forged it into small cylinders or steel bars two fingers wide under Qin Chuan's fingers, and grinded them into a uniform size, a uniform length, and fine to the slightest.

The steel bar should be wrapped in the iron billet, forged into two steel rings, one large and one small, and then grind out a shallow rolling groove, inlaid the steel column into it, and now there is no technology to make the chain plate, so this thing is saved, the rolling groove is filled with steel columns, and then the lubricating meat is poured in, and the edge is sealed with steel sheets, and a primitive bearing appears.

With the current technology, it is impossible to manufacture steel balls with uniform specifications, and Qin Chuan retreats to the next best thing, and can only use steel columns, which can also have a good rolling effect anyway.

It is impossible to refine the bearing steel, and it can only be relegated to the second best thing, using Suzhou steel.

The role of these bearings is only to fix and drive the drill shaft, unlike the wheel bearings of later generations that need to carry weight, so Sugang can also be used, pay more attention to the heat dissipation inside the bearing, and replace it directly after wear, anyway, Qinchuan has materials.

After the bearing is completed, the next step is to make the bed and slide rail, the former can be made of wood, but the slide rail must be made of steel, directly cast, and then slowly grinded, strictly ensure that the slide rail is straight, and the connection is tight.

Then there are drill shafts, drill bits, fixtures, etc., which are not very difficult, but they are time-consuming and material-consuming, and the quality of the drill bits is difficult to guarantee, so they can only be stacked with quantity.

According to Li Xuejing's estimate, it takes half a month for a blacksmith to take two apprentices to complete all the steel tools needed for a boring machine, and ten blacksmiths can only produce less than 20 boring machines a month.

This is just a small boring machine with a drill bit and slide rail length of only one meter, which can no longer be simpler, and in the future, if there are enough materials and tools, a skilled fitter can do it in two days.

In Qin Chuan's plan, after these craftsmen were comfortable making small boring machines, they began to manufacture boring machines with a larger specification for drilling gun chambers.

In the early stage, these boring machines were driven by animal power, and a set of linkage tools was made, and a donkey should drive several boring machines to drill at the same time, and after the completion of the Xitougou Reservoir, a row of workshops was built under the reservoir, and several waterwheels were made to drive with water power.

At the same time, he will gradually study and improve boring machine technology, knife technology, and experiment with solid rod drilling technology to make guns and cannons.

……

After staying in the musket factory for a whole day, in the evening, Qin Chuan pulled Wang Jizong and wanted to go to the inner courtyard to find Wen Suxin for dinner.

But at this time, he suddenly received a report from the sentry: Hu Dawei is here.

Qin Chuan sighed helplessly, and then gave up the idea of having dinner with the beauty, and went to the village gate to greet Hu Dawei instead.

Hu Dawei didn't seem to be in a very good mood, so he only nodded to him as a greeting, and then silently followed him into Zhuangzi.

Now that the weather is cold, Qin Chuan did not entertain him on the gatehouse, but changed it to a room close to the Zhuangmen.

As soon as he sat down, after everyone else went out, Hu Dawei said a little lonely: "Lord Futai has been demoted. ”

Qin Chuan was stunned for a moment, and then frowned, Song Tongyin still can't escape the fate of being dismissed after all?

"He was demoted to Xiningwei and presided over the affairs of Tuntian." Hu Dawei added.

Qin Chuan breathed a sigh of relief, in his opinion, Song Tongyin is not bad, if he is dismissed like in history, and ends up depressed after two years, it would be a pity.

Now fortunately, it is not a dismissal, but a demotion and transfer to guard the frontier, which is slightly better than the result in his previous life, and it should not make him so depressed that he will die of illness.

Xiningwei is adjacent to Qinghai, and now that Lin Dan Khan has been driven to Qinghai by Huang Taiji, maybe when he goes to Lin Dan Khan and Yarkand to do business one day, he can still go through his relationship.

"Who will succeed Lord Song?" After pondering for a moment, Qin Chuan suddenly asked.

"Lord Xu Dingchen."

Sure enough, there is not much deviation from the historical trend, and it is still Xu Dingchen who replaces Song Tongyin.

The final fate of this one is similar to Song Tongyin, and he will also be taken off the black gauze hat on his head a year later.

Qin Chuan doesn't care about this person's future, he only cares about this person's attitude towards him.

and the fickle and self-righteous Zhu Youzhen, what is his attitude towards himself.

Qin Chuan asked again: "Lord Hu, when you came to Mengjiazhuang, should you have made a special trip to tell me about this?" ”

Hu Dawei shook his head and shouted out the door.

The Rhodoshi pushed the door open, followed by an attendant holding a wooden box.

Greeting Qin Chuan, Luo Dushi opened the wooden box and took out a scroll from it.

"Congratulations to Lord Qin, from today onwards, Lord Qin will be the new Lord of the Thousand Households of the Sixth Grade, and he will be the new Lord of the Thousand Households of the Ninghua Shouyu Thousand Households, please Lord Qin to inherit the edict of the emperor."

Qin Chuan was stunned for a moment, and wanted to laugh in his heart, but he still stood up and took the scroll with both hands.

"Lord Qin, this is a royal waist knife, which is given by the emperor, as well as your official uniform and the waist card of 100 households."

Luo Dushi respectfully brought the wooden box over.

Qin Chuan took the wooden box, took a cursory look inside, and then nodded to Luo Dushi and Hu Dawei respectively to thank him.

"Thank you, Lord Luo, thank you, Lord Tiger."

"Your Excellency is gracious."

"Come, take two ingots of silver, and then take some broken silver to buy wine and drink for Lord Tiger and Luo Dushi's brothers."

"Lord Qin is polite."

"Luo Dushi, please sit down, please tea."

"Lord Qin, please."

Luo Du got a silver ingot of twenty taels, and his face smiled like a chrysanthemum, and he was polite and polite to Qin Chuan.

Hu Dawei casually stuffed the silver ingot given by Qin Chuan into his waist and continued to drink tea.

After a few polite words to Luo Dushi, Qin Chuan turned to him and asked, "Will Lord Tiger stay in Taiyuan in the future?" ”

Hu Dawei shook his head: "The new Lord Futai wants us to go south and garrison the Fenzhou area with the Governor of Xuanda, I am afraid that I will not have time to rob your horses in the future." ”

"That'...... Can you bring wine with you this time? ”

"Bring it, I'm afraid that your kid won't have any wine to drink, so I brought you a full two hundred catties."

"Thank you, Lord Tiger."

"Two good horses in exchange."

"This ...... All right. ”