Doomsday Bunker Upgrade

Can the cutter head of the shield machine be replaced with a drill bit?

If someone else asked this question, the staff might not even bother to answer it, just give that person a blank stare and it's over.

But it was Chen Xin who asked this question, and the staff had to seriously consider how to answer and explain it, so that Chen Xin could understand that this was impossible, and at the same time save him face.

However, even so, in the eyes of the staff, this idea is still impossible.

Although the cutter head of the shield machine itself is equivalent to a huge drill bit, the staff also understood that what Chen Xin meant was whether the big plate-like cutter head in front of the shield machine could be replaced with that kind of pointed drill bit.

After all, in the eyes of many people, the pointed drill bit is very efficient in drilling holes, so that in many cartoons or some science fiction works, there is a kind of big drill bit in front that can quickly drill holes in the soil. Tunneling machines exist.

The specific principle is quite difficult to explain, but there is a fairly easy-to-understand explanation, that is, if the helical drill bit is so easy to use, why don't everyone use such a drill bit to dig holes?

The answer is naturally very simple, naturally it is not easy to use, and everyone does not use such a drill.

In fact, anyone who has a little knowledge of drill bits will find that the structural front ends of most drill bits tend to be flat, and there are very few very sharp drill bits.

This is mainly because the drill bit is usually used to drill hard objects. If the drill bit tip is too sharp, it will be easily worn off, which will affect the service life and effect of the drill bit.

Therefore, most of the drill bits are designed with the flat head as possible and made of hard metal to enhance their durability.

The cutter head of the shield machine is actually a rotating mechanism with grooves, and a large number of blades are installed on it to cut rock and soil layers. Although it can be regarded as a huge drill bit, it does not mean that The cutter head of the shield machine is really a drill.

When the cutter head of the shield machine is working underground, it will encounter various strata. The hardness of these different strata is different, which makes the stress on the cutter head very complicated. It is not the kind of auger bit that works in a uniform medium. Force is not considered.

Therefore, the machines with drill bits at the front end in cartoons and science fiction works are only imagination after all, and cannot be applied to reality.

After listening to the staff's explanation, Chen Xin was naturally a little embarrassed, feeling that his idea was a little whimsical.

However, his idea is not impossible. After all, with the system in hand, Chen Xin can do many things that others cannot.

Of course, even with the system as the backing, Chen Xin will not win blindly. Now that the professionals say that it is not feasible to change the drill bit, he will not forcefully say that he must try it.

The most appropriate way is to do an experiment first, just like the construction of the dome city and the ecological circle, do a few simulation experiments, and you will naturally know whether it is feasible.

Having figured this out, Chen Xin didn't continue to embarrass the staff. He just told him that he might need a super-large shield machine to perform the task, and then left the factory.

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Back in his office, Chen Xin first entered the blueprint of the shield machine brought back from the factory into his watch, and then projected it out with nano-molecules.

Looking at the shield machine model projected in front of him, Chen Xin studied the model while thinking about how to upgrade it.

To put it bluntly, the principle of the shield machine is that the front end is continuously cutting, and then the segments are installed into the excavated pipeline at the back, so as to realize the rapid construction of the tunnel.

Therefore, what affects the working efficiency of the shield machine is the cutting efficiency of the front cutter head.

This is also the reason why Chen Xin wanted to replace the cutter head with a drill bit. In his opinion, the cutting efficiency of the drill bit is undoubtedly higher than that of the cutter head.

Although the professionals in the factory said it was unlikely, Chen Xin did not give up the idea completely.

With the idea of ​​giving it a try, Chen Xin first upgraded the blueprint of the shield machine and adjusted it to a form with a big drill at the front end.

Then started the virtual simulation system, intending to simulate and test the situation of this structure in actual use.

However, the result disappointed Chen Xin, because the drill bit is solid. During the underground drilling process, due to continuous cutting and friction, a lot of heat was generated and could not be dissipated. In the end, it was damaged due to local high temperature and wear without digging far.

Obviously, this plan is indeed whimsical and unrealistic.

Therefore, Chen Xin quickly adjusted his thinking.

Since the drill bit is impractical, what about adjusting the structure of the cutterhead?

With this in mind, Chen Xin upgraded and adjusted the drawings again, upgrading the original cutter head of the shield machine to a slightly convex shape in the center, and optimizing the structure.

This time the effect is satisfactory. Although the excavation efficiency has not improved much, the adjusted shield machine has successfully completed the excavation.

This result undoubtedly gave Chen Xin encouragement, and at the same time made him clear his mind.

Abandoning the idea of ​​an unrealistic drill bit, and instead conducting research on the cutter head structure and working methods of the shield machine, in order to improve its working efficiency.

The cutter head of the shield machine is mainly used to loosen, break and excavate the soil or rocks underground. Because of its huge size, its working speed is not fast, and it can even be said to be slow.

After all, if it is fast, the heat generated by the friction will be amazing.

Chen Xin tried to double the rotation speed of the cutter head of the shield machine, but the result was not an increase in work efficiency, but the melting and wear of the cutter head on the same cutter head due to high temperature, and eventually the entire cutter head The disk is damaged.

This undoubtedly caused great restrictions on Chen Xin, making him need to think about a more suitable solution.

Although system upgrades can do things that cannot be done under normal circumstances, the basic laws of physics must still be followed. If Chen Xin cannot perfect a reasonable and feasible solution, then even system upgrades will only cause trouble. It's just industrial waste with no practical value.

Therefore, Chen Xin must carefully conceive a reasonable plan, and at the same time make a breakthrough while being reasonable. This is also a very difficult task for him.

In particular, he needs to come up with a feasible plan as soon as possible so that the military can start implementing it as soon as possible and save time.

"Hey, it looks like I'm going to work overtime again!" Chen Xin smiled wryly, but he wasn't too depressed. Instead, he cheered up and threw himself into work.