Back in Fanjiazhuang, Li Zhi checked various industries again, and after confirming that there were no problems, he began to devote himself to the development of rolling bearings. Pen ~ fun ~ pavilion www.biquge.info

Bearing is an indispensable thing for industrial production, which can greatly reduce the rotational friction at the mechanical connection, improve the operation efficiency of the machine, and enhance the stability of the mechanical operation. If there were no bearings, modern machinery would not be able to do it at all.

As an industrial designer, the production of bearings is also considered a basic skill. Before the crossing, Li Zhi had understood the principle of bearings, and also consulted some simple methods for making bearings, and now he is just taking them out to use.

Li Zhi selected ten blacksmiths who could process steel tools from among the blacksmiths who were apprentices to gunsmiths, and selected the ten most honest men, and called them to stand in a specially built workshop. The workshop was divided into ten rooms, each with a stove for striking iron and burning steel.

Li Zhixian and them carried out the education work on the confidentiality regulations: "I asked you to make a new thing, and after this thing is made, your monthly income will be increased to three taels per month, and three meals will remain the same. ”

Hearing Li Zhi's words, the craftsmen were very excited.

Adults are going to do something new again? I've found myself this time, and I'm going to get rich!

Li Zhi excited the craftsmen for a while, and then said slowly: "But to give you a high salary, what you want is that you keep it a secret." If I find out who leaked the secret of producing this thing, it's a capital offense! Glancing coldly at the ten blacksmiths, Li Zhi said, "The nine traitors in the glass workshop are the precedent. You don't want to repeat the same mistakes, do you? ”

The ten craftsmen didn't be happy for a while, and they were scared and nervous by the words of the master.

Wu Tietou, who was selected as the head craftsman, hurriedly replied:

"Lord Ethics still can't trust me Wu Tietou? It's the knife holder on my neck, and I don't leak a little secret out! ”

The other craftsmen also replied, "My lord, we are all honest blacksmiths, and we will not divulge secrets!" ”

"My lord, we all do things honestly and will not leak secrets."

Li Zhi nodded, and said: "This new workshop implements a joint sitting system, one person leaks secrets, and ten people will be punished together!" The leaker is killed, and the others will also have their wages deducted for one year. So if you see someone else stealing secrets, go up and stop it, report it! ”

Wu Tietou patted his chest and said: "Don't worry, my lord, whoever steals the secret will be the first to have trouble with him!" ”

Li Zhi looked at the blacksmiths, and saw that the blacksmiths were all serious and shocked, so he said, "What I want to do is called a bearing!" I'm going to use the best sugang to make eight steel balls, and I want to polish and round them. Then two steel rings will be cast, one large and one small, and the steel rings will leave a track of two steel balls, one inside and one outside. The eight steel balls are then allowed to rotate on the orbit of the steel ring. Finally, make two iron cages and fix these steel balls inside the steel rings so that they do not collide head-to-head. ”

Hearing Li Zhi's words, the ten blacksmiths were a little confused. They hadn't seen a rolling bearing, and they didn't know what Li Zhi was talking about.

Li Zhi began to teach them one by one.

Li Zhi divides the production of bearings into five processes. The first process is to make two steel rings, one large and one small. The second process is to cut the steel rods in small sections as raw materials for making balls. The third step is to heat the ball raw material, and then beat a small section of steel rod into a ball by placing the high-temperature and soft ball raw material on a steel mold. The fourth step is to polish the balls with a good porcelain clay grinding wheel and a stainless steel grinding disc to eliminate burrs and polish the steel balls. The last process is to make two cages out of iron sheets, clamp the balls on both sides, and fix the steel balls to the predetermined position of the track.

Li Zhi divided the ten craftsmen into five groups and operated different processes. Li Zhi asked the craftsmen to only pay attention to their own processes, and not to understand the operations of others.

Then Li Zhi took out the drawings he had drawn and showed them to the five groups of craftsmen in each process.

After reading the drawings, the ten craftsmen had a slight idea of what they should do.

Li Zhi guided the craftsmen from beginning to end to build bearings.

The first is to cast the steel ring, which is very simple, and the molten steel is formed by casting the molten steel with a mold made of sand. However, in order to reduce the porosity honeycomb on the steel parts, Li Zhi asked the blacksmiths to use the cast steel rings to make iron molds, and then use the iron molds to cast the steel rings.

Then a round steel rod is burned red and soft, and a small section of steel is cut out on a simple cut-off device as the raw material for the ball.

Put the raw materials of the balls one by one into a furnace and heat them until they are hot, take out the raw materials one by one, put them on a steel block with a semi-circular hole, use a steel stick with a semi-circular hole on the ball raw material, hammer the steel rod with a hammer, and squeeze the raw materials into a spherical shape.

Once the rough balls are obtained, the balls are screened with multiple ball sieves to remove balls that are too large or too small. The balls are then deburred and polished with a grinding wheel and grinding disc. After obtaining the smooth ball, the ball is tempered and heated, and finally poured into the hot oil to quench to improve the hardness of the ball.

After the balls are done, the balls are arranged in a row into the outer ring of the bearing, and after the inner ring of the bearing is installed, the balls are slid to different positions, and the balls and the inner and outer rings are connected into one and will not fall off.

Finally, the cage is made of iron sheet, fixed with steel nails, and the balls are wrapped from both sides, so that the eight balls are evenly distributed in the steel ring and will not collide and rub.

Li Zhi instructed different blacksmiths one process at a time, made tools to operate and produce, and finally spent fifteen days to make the first rolling bearing of this era.

Li Zhi added some oil to the bearing, put the bearing on his hand and turned it hard, and the bearing turned four or five times before stopping.

The blacksmiths were amazed to see the final effect of the bearings. The craftsman Wu Tietou said: "Master Integrity, this circle can roll so many circles by itself, it's so smooth!" What is this for, my lord? ”

Li Zhi didn't answer Wu Tietou's words, and wondered why this bearing was not good? Can only turn four or five times? Although this is much better than no bearing, it is clear that the bearing designed by Li Zhi should not have such an effect. After thinking about it, Li Zhi felt that the inner and outer rings of the bearing were probably too rough, and the friction coefficient was too high, causing the ball to stop after a few turns.

It seems that the inner and outer ring tracks of the bearing should also be finely polished.

Li Zhi added another process to the whole production - inner and outer ring track polishing - after the steel ring is cast, use a good porcelain clay grinding wheel and a stainless steel grinding disc to polish the burr and polish the track.

It took another three days, and Li Zhi led the blacksmith to make the polishing tools and polish the ball's tracks.

After re-making the bearings and putting on good oil, Li Zhi grabbed it in his hand and turned it hard. The bearing did not stop this time, and it turned and turned for a long time, at least a dozen times, and then slowly stopped.

Such a bearing has been able to meet the use of Li Zhi, and Li Zhi is very satisfied.

Happy in his heart, Li Zhi said loudly: "The bearing is successfully manufactured, and each of the ten craftsmen will be rewarded with three taels of silver!" ”

The craftsmen were overjoyed and said loudly one by one: "Your Excellency! ”

"Your Excellency is so arrogant!"

"Thank you, sir!"

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Thanks to the local tyrant 123 for the 500 tip, thanks! Thanks for the reward that is good to be alive