Li Xiang's advantage is that he has a super 3D printer, can find all kinds of machines, and has seen all kinds of modern machine products, touching the bypass, and can lead him to imagine more associations. Pen ~ fun ~ pavilion www.biquge.info

Compared with the results of science, the scientific method is also very important, so Li Xiang is not in a hurry, but assigns tasks to everyone step by step, collects relevant information for analysis, and makes corresponding samples for experiments.

Li Xiang also participated in this process, leading the research with the vision of the times, as well as a richer knowledge structure and scientific research methods.

Relatively speaking, the function of these two machine tools is single, and the structure is also very simple, especially the sawing machine, the core of which is a circular saw with high rotation.

From a straight saw to a circular saw, this simple change immediately made the continuous movement of the saw easy, but it was such a simple structure that they were still at a loss.

It is not a problem to make a circular saw, the problem is to make the circular saw turn, and it must turn fast and easy to drive, which is more difficult.

Li Xiang asked people to collect and sort out all kinds of items related to rotation in this era, from hinges, door pivots, and flails to large carriages, waterwheels, stone mills, and spinning wheels, among which the structure of the carriage and the spinning wheel is undoubtedly the closest to the requirements of the sawing machine.

In fact, the structure used in horse-drawn carriages and spinning wheels is roughly similar, they are bearings, and they are plain bearings, that is, a round shaft, which is encased in a circular hole in the bearing.

Li Xiang thinks that maybe he can try rolling bearings. Rolling bearings, specifically roller bearings first appeared in the Yuan Dynasty, invented by Guo Shoujing, used in astronomical instruments, four rollers are installed between two rings, strictly speaking, it is not a bearing for mechanical purposes, but it has the basic structure of roller bearings.

The work of making bearings is obviously not something that can be completed by carpenters alone, Li Xiang had to transfer craftsmen who are good at making iron parts from the capital institute to join, and also drew the drawings of the bearings.

The production and operation of the capital institute is gradually smooth, and the transfer of craftsmen at this time will inevitably affect the production of artillery, of course, Li Xiang is not too anxious, and the artillery will definitely be able to be built.

However, Li Xiang understands the value of bearing optimization, compared with sliding bearings, rolling bearings are subject to less friction, just replace the existing sliding bearings with rolling bearings, can improve the operation efficiency of horse-drawn carriages and spinning wheels. Even, in the future, those guns can also be mounted on the car, like the direction machine of the cannon or something, and the bearings can also be used.

What's more, with rolling bearings, sawing machines and round bar machines, and even other lathes can be made, which is almost epoch-making and will fundamentally improve productivity.

Therefore, Li Xiang mobilized resources in his hands almost regardless of costs and benefits, and invested in the opening of bearings and woodworking lathes.

"Take a look, can you make this kind of bearing on the drawing?" Li Xiang distributed the drawings to several craftsmen.

The bearing on the drawing appears to be simple, consisting of three parts, an inner ring, an outer ring and a ball.

"This is a bearing?" Yu Tao and Liu Dawa are both experienced craftsmen, and both have made many iron tools, but they are a little unfamiliar with this pattern on paper.

But this surprise was only a moment's work, and they soon understood the meaning of this picture, and they all exclaimed: "Wonderful! ”

Yu Tao patted his thighs with his hands: "Install the rollers in the inner and outer rings, and when the rollers roll, the resistance will be greatly reduced, wonderful!" ”

Not everyone understands the meaning of rolling instead of sliding, Li Xiang took a marble and explained to the others: "If it is a wooden board on the ground to drag, it takes a lot of effort, but when it is made into a wheel to roll, you don't need to use any force; And this inner and outer ring is equivalent to a curved road, and the ball is the wheel. ”

Li Xiang is more concerned about whether the bearing can be made like this. The ground structure of the rolling bearing is not complicated. But the mechanical properties of the workpiece. and machining accuracy are highly demanding.

"This ball ......" Yu Tao glanced at Liu Dawa hesitantly: "You can do it." But to achieve this accuracy......"

"I can do it. It takes work. Liu Dawa said in an urn voice.

"That's good." Li Xiang clapped his hands happily. Woodworking lathes are different from anything else. Even if it takes more time. Once it's made. However, it can greatly improve manufacturing efficiency. It's still worth putting in.

But. Li Xiang still asked: "If it is a bearing of this specification." Twelve balls. How long does it take? ”

"Give me half a month." Liu Dawa said loudly. It looked a little urgent: "A month at most!" ”

"A month?" Although he was already mentally prepared, Li Xiang was still taken aback by this number, and he looked at Yu Tao again, who obviously lacked more confidence.

The curved diameter of the twelve balls, the error must be controlled to one centimeter, or even less than one-fifth of a centimeter, made by hand, and the slightest mistake must be made from scratch, and a month is really not much.

Li Xiang thought about it, and finally decided to give it a try, and formulated three sets of plans, with Liu Dawa led by ball bearings, Xu Hong led by roller bearings, and Zhao Dawei led by wooden sliding bearings, and let them form a special "work" - bearing work.

Compared with ball bearings, the cylinders of the same specification are inlaid between the inner and outer rings of roller bearings, and the shape is similar to that of marble locks, but the requirements for material and precision are higher.

Although bearings are the key to Li Xiang's lathe plan, there are still many problems to be solved to build a lathe, even the simplest woodworking sawing machine, and Li Xiangxian has too few people under his command to use it. Of course, on the other hand, it is also because the printing materials of the super 3D printer are limited, and it is impossible to print them indefinitely.

In order to get rid of the dilemma of lack of manpower, Li Xiang planned to recruit more craftsmen, and began to cultivate ideal new talents, opening professional schools, recruiting children and teenagers of different ages to enroll in school, learning mathematics, drawing, and mechanical knowledge.

He called several more down-to-earth and reliable craftsmen together: "From today on, Zhao Dawang is not only responsible for the construction of the printing house, but also for the management of the woodworking workshop and the preparation of professional schools." ”

Zhao Dawang showed strong coordination and organization skills at work, and Li Xiang saw it in his eyes and was very satisfied, and decided to add some burden to him.

Zhao Dawang also understood what Li Xiang meant, which meant that he would have more power and play a greater role, and he was grateful, and stood up and saluted deeply: "Dawang will definitely live up to the trust of adults." ”

Li Xiang smiled and waved his hand, motioning for him to sit back: "I can rest assured that you are doing things." (To be continued.) )