Super Chief

　　 Manual rifling is indeed a very laborious task.

The quality of this manual wooden broaching machine made by Ferguson and Wood's family is still very good. At the very least, when the slider is pulled, the transmission parts are running steadily, and the rotation of the barrel is extremely stable, which is enough to explain The quality of this broaching machine is excellent.

　　 This is a wooden broaching machine, not a real steel lathe of later generations. Generally speaking, this kind of thing made of wood will vibrate or even shift when it is running. However, this broaching machine does not have such a situation, or it does, but it is very slight, and it is invisible to the naked eye.

　　It’s no wonder that in order to maintain the stability of this broaching machine, the eight wooden feet of the broaching machine are all buried in the ground...

　　 But even with such a stable broaching machine, it takes a lot of effort to pull the rifling.

　　 A young baby like a rabbit’s mouth and a hard bone has already weakened his arms by pulling the slider twice in a row. This thing is completely relying on the strength of the human body, forcibly pulling a hook knife to cut a layer of steel from the inner wall of the barrel, and it also drives a three-stage reduction gear, which can’t be pulled without enough strength. Sliders on the broaching machine.

　　 Like several adult men who Ferguson asked for help, after pulling the slider four or five times in a row, they also grinned and said they needed a rest.

　　 Shixiong also tried to pull it a few times, and sure enough, this job is not something ordinary people can do.

　　 Even with Shixiong's strength, he felt that his arms began to sore after pulling it twenty times.

Fortunately, for the first time, the rifling did not require any time, so the five or six men surrounding the broaching machine took a full afternoon to pull the barrel out of the four rifling. .

　　 rifling is divided into two types of yin and yang rifling, the yang rifle is convex, and the yin rifle is concave.

　　 And the yang rifle is produced in the process of pulling the Yin rifle.

　　 So, even if only four male rifles are pulled out, it is actually equivalent to cutting down the inner wall of the entire barrel by about 0.15 mm.

　　 Although it is very laborious, although it is a wooden broaching machine, it can process the rifling with an accuracy of 0.15 mm. This life can only be described by the word "beautiful" in this era.

　　 At the very least, Lieutenant Ferguson was satisfied with the rifling.

　　 You must know that in this era, let alone the accuracy of one-tenth of a millimeter, even if it is doubled, it is still very good. Thanks to the craftsmanship of the old wood family, the quality of this broaching machine is really good.

　　 "Boss, the rifling of this barrel is very good. It can be said to be the most beautiful rifling I have ever seen." Lieutenant Ferguson said excitedly while holding the barrel.

Shi Xiong nodded, "Yes, the rifling of this barrel is really good, but the efficiency of this lathe is too low. We five or six people worked hard all afternoon to come up with such a barrel. How many people do you need to make gun barrels on a large scale?"

　　 This remark made the old wood on the side a little ashamed, and Lieutenant Ferguson also opened his mouth and didn't say anything to refute it.

　　 "So, I think this broaching machine needs to be improved, at least not so hard." Shixiong said unceremoniously.

　　Although he has not been with Stone Bear for long, Ferguson is indeed a very smart person. He has already figured out some of the temperaments of this boss who looks scary on the outside but is actually very delicate on the inside.

　　 So, when Ferguson heard Shi Xiong say this, his eyes lit up and asked, "Boss, do you have any idea?"

　　 Shi Xiong looked at Ferguson with a look of excitement, and nodded slightly.

　　 Don't think that Shi Xiong was an out-and-out otaku in his previous life, but he also has many hobbies, such as reading books and consulting materials. In addition, Shi Xiong is still a semi-military fan.

　　 When he checked some firearms information in his previous life, he once watched a video. The content recorded in the video was based on the principle of rifling.

　　 Rifling is not a thing to look down upon, but it is the soul of a gun. Shixiong is also very curious about how the rifling is pulled out, so I have watched this video.

　　 The principle of rifling introduced in the video is almost the same as Ferguson and others rifling just now, but they have more advanced equipment, after all, they are modern lathes.

　　 However, Shi Xiong was also inspired by that video, especially when I saw the deceleration device at the bottom of the broaching machine, I didn’t know how to do it. This inspiration came just like a diabetes collapse...

"This broaching machine is still very good, but the only disadvantage is that it consumes too much energy, and the force is lost too much in the transmission process, so we should focus on these two aspects of improvement." Shi Xiong pointed to that. The slider refers to the deceleration device at the bottom of the broaching machine.

"Wood, since you can make this type of deceleration device that is conveyed by a belt, then I believe you should be able to make a more labor-saving power device." Shixiong pointed to the slider and said, "For example, can we change one The idea is that we don’t use a slider as the source of power ~www.wuxiaspot.com~ but replace it with a fixed device."

　　 This sentence made several people feel a little bit trapped.

Shi Xiong shook his head and pointed to the position of the slider and said, "If you can make a uniform round wheel as a deceleration device from old wood, can you build a deceleration device at this position? Well, a small wheel can be placed here. , And then install a big wheel here, and connect the two with a belt. Then when we turn the small wheel, the big wheel can rotate with the belt."

　　 Old Wood nodded thoughtfully, "Master Guardian, this device is not difficult to build. But, the wheel is spinning, how do you drive the hook knife?"

"Hehe, this is not easy? You install a steel bar perpendicular to the big wheel on the big wheel, and then change the tie rod screw to have eyelets at both ends. Then one end of the tie rod screw can fit into the steel bar on the big wheel , And the place where the other end is connected to the hook knife is slightly improved. Instead of allowing the pull rod to be directly connected to the hook knife, a connection fixing device is made behind the hook knife. The hook knife is connected to this device, and the pull rod is connected to this device. Connected to the other side."

Shixiong gestured with both hands: "The eyes on both ends of the tie rod are attached to their respective connecting parts, so they can move freely. Then when we turn the small wheel and the big wheel rotates, the tie rod screw can complete a forward and backward advancement. Actions."

"If we set the diameter of the big wheel to be the same as the length of the barrel, then every time the big wheel turns a circle, then we can push the rod screw with the hook knife to make a complete reciprocating motion in the barrel... ..."

　　 Along with Shi Xiong's explanation and gestures, both Old Wood and Ferguson's eyes lit up.

　　PS: Bow and thank you for the reward of "Mourning Wu Huaxia" 300.