Chapter 101

In fact, the meaning of stone bear is very simple, that is to change the slider directly pulled by human force on this broaching machine into mechanical drive.

The slider on the broaching machine is not small. The reason is to keep the stability of the hook when pulling the hook. Therefore, coupled with the strong friction between the hook knife and the inner wall of the gun barrel and the speed reduction mechanism under the broaching machine, it takes great force to pull the slider.

The key theory is that the small wheel is driven by human power, and then the small wheel drives the big wheel, so as to save labor.

Although this will reduce the speed of rifling, it can greatly save energy.

Although old wood and Ferguson don't understand the principle of reducer, they have met almost the same things in their daily life. So they will soon be able to figure out what the guardian is saying.

"Boss, this method you said is really feasible, but there are still some places I don't understand. For example, if this improvement is adopted, how can the barrel keep rotating during rifling? Also, what shape should our hook knife be made? In addition... "

With a series of questions raised by Lieutenant Ferguson, Shi Xiong also understood that although they understood the principle of power take-off, they were still far from making such an improved machine tool.

Shi Xiong doesn't really know how to make this broaching machine. He just saw the operation principle of rifling machine in that video. If you ask him to tell you how to make this improved broaching machine, he really doesn't know.

But it doesn't matter. Whether it's Ferguson or old wood, or the rabbit mouth and bone behind Ferguson's buttocks, they are all good at studying. As long as you tell them the principle, and in terms of the studying character of these guys, this improved broaching machine should be made soon.

"Come here, everyone. I'll draw you a general picture." Stone bear is not ambiguous, directly called a few people to the broach next to.

The slide of broaching machine is very flat, so it is very good to use this slide as a drawing board.

Hard bone took out a piece of coal from his pocket, which was ground into a cylindrical shape, and handed it to the stone bear. This is the "charcoal pen" he specially ground out according to the stone bear. No way, the tribe is so poor, no charcoal, had to use coal instead.

As a cultural protection expert, Shi Xiong's painting skills are quite good. Even with a "charcoal pen" polished with coal, he swished down a few strokes, and a simple but well-organized broaching machine appeared on the slide.

This broaching machine looks much more compact than the present hand-made wooden broaching machine. Several wheels of different sizes are in the middle of the broaching machine.

"In fact, these wooden wheels are similar to the deceleration device at the bottom of this broaching machine, but you need to experiment many times to calculate the proportion between these wooden wheels, so as to ensure the distance and speed of the final pull rod movement."

Lieutenant Ferguson nodded and said, "boss, Mr. wood and I have experience with this kind of power transmission. We will do it well."

Stone bear nodded, and then said: "next, I'll focus on how to make the hook knife move according to our wishes, and the rotation of the barrel."

Then the stone bear drew another picture in the spare part of the slide according to the picture in the video he had seen.

This picture is actually a shelf with a slot. There is a small slider in the middle of the slot. There are two connecting rods under the small slider, but Shi Xiong draws a "? Under one of the connecting rods.

"In fact, it's not difficult to solve the problem of keeping the barrel rotating at a constant speed. You see, if we install such a grooved device above the pull rod screw. Well, this is the chute. There is a slider on the chute that can slide freely. The slider is connected with No. 1 connecting rod and No. 2 connecting rod. When the chute is installed, there should be a certain slope, and then the No. 1 connecting rod is connected with the longest pull rod screw. When the big wooden wheel drives the pull rod screw to move forward, the No. 1 connecting rod will push the chute to move. Because the chute has a slope, when the slider moves, it will drive the No. 2 connecting rod to move up or down vertically. "

Shi Xiong's continuous brushwork and drawing, and several people soon understood the working principle of this device. The working principle of this device is not difficult, even the old wood, rabbit mouth and Indians who have never received any education can clearly understand the working principle of this device.

Stone bear then said: "you see, as long as the pull rod screw moves back and forth, then the No. 2 connecting rod can keep moving up and down. In this way, can we install another device under the No. 2 connecting rod to control the rotation of the barrel

Stone bear's understanding of that video is so far away. Further down, he can't remember that video clearly. But here, most of the core problems can be solved.

After all, this thing is a problem of mechanical energy exchange, which is nothing more than changing the horizontal movement into the longitudinal movement or the circle movement. As long as it is well controlled, it is not difficult to solve the problem of the fixed rotation of the barrel when the hook knife is pulling rifling.

Sure enough, a gun genius, Lieutenant Ferguson, has a great talent in this field. After listening to the explanation of stone bear, he just pondered for a while and nodded his head and said, "boss, we can install a cogged device under the No. 2 connecting rod or a small deceleration device, and finally connect it to the barrel, Then the barrel can rotate at a uniform speed, but this requires a lot of calculation and experiment

After a pause, Lieutenant Ferguson said with certainty: "boss, if this broaching machine is improved according to your way of improvement, then I can conclude that the efficiency and accuracy of rifling will be greatly improved. For example, five or six of us pulled out only one barrel this afternoon, but if we use this broaching machine, at most two of us can pull out one barrel in half an afternoon. I'm sure of that! "

"Ha ha, what are you doing? Now that we understand the improved principle, we should quickly calculate and experiment! We have no shortage of barrel. You can cast it as you like. We don't lack wood, and we don't lack carpenters, so let's go to experiment! Well, if you can experiment with this kind of improved wooden broaching machine, we can even consider casting such a broaching machine with steel in the future! "

Stone bear's words brightened Ferguson's eyes once again