Chapter 797

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

If someone else asks this question, the staff may not even bother to answer, and just give the person a blank eye.

But Chen Xin asked this question. The staff must seriously consider how to answer and explain, so that Chen Xin can understand that this is impossible and save face for him at the same time.

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

Although the Cutterhead of the shield machine itself is equivalent to a huge drill bit, the staff also understand that Chen Xin means whether the cutterhead like a large flat plate in front of the shield machine can be replaced with that kind of pointed drill bit.

After all, in the eyes of many people, the efficiency of drilling is so high that many cartoons or some science fiction works have machines that can quickly dig in the soil with a large drill in front.

It takes a lot of time to explain the specific principle, but there is a very simple and easy to understand explanation, that is, if the spiral bit is really easy to use, why don't we use that bit to dig holes?

Naturally, the answer is also very simple. Naturally, it is not easy to use. We don't need such a drill bit.

In fact, as long as people have a little understanding of the drill bit, they will find that the front end of the structure of most drill bits basically tends to be flat, and there are few very sharp drill bits.

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

Therefore, most of the bits are designed with a 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. A large number of blades are installed on it to cut rocks and soil layers. Although it can be regarded as a huge bit, this does not mean that the cutter head of the shield machine is really a bit.

When the Cutterhead of shield machine works underground, it will encounter various strata with different hardness, resulting in the stress of cutterhead is very complex. It is not the kind of screw bit working in uniform medium, so the stress can be ignored.

Therefore, the machine whose front end is a drill in cartoons and science fiction is only imagination, but can not be applied to practice.

After listening to the staff's explanation, Chen Xin was naturally embarrassed and felt that his ideas were a little whimsical.

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

Of course, even if there is a system as a backer, Chen Xin will not win blindly. At present, since professionals say that changing drill bits is not feasible, he will not say that he has to try.

The most appropriate way is to do an experiment first. Just like the original Dome City and ecosystem, do several simulation experiments, and naturally you can know whether it is feasible.

To understand this, Chen Xin did not continue to embarrass the staff, but told him that he might need a super large shield machine to perform the task, and then left the factory.

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Returning to his office, Chen Xin first input the shield machine drawings brought back from the factory into his watch, and then projected them with nano molecules.

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

The principle of shield machine is to cut the front end continuously, and then install the segments one by one into the excavated pipeline, so as to realize the rapid construction of tunnel.

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

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

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

With the idea of trying, Chen Xin first upgraded the drawings of the shield machine to the form that the front end is a large drill bit.

Then the virtual simulation system is started to simulate and test the actual use of this structure.

However, the result disappointed Chen Xin, because the drill bit was solid. In the process of underground drilling, a lot of heat was generated due to continuous cutting and friction, which could not dissipate heat. Finally, it was damaged due to local high temperature and wear.

Obviously, this plan is really whimsical and not very practical.

Therefore, Chen Xin quickly adjusted his thinking.

Since the drill bit is not practical, what about adjusting the structure of the cutterhead?

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

This time, the effect was satisfactory. Although the tunneling efficiency was not improved much, the adjusted shield machine completed the excavation smoothly.

This result undoubtedly encouraged Chen Xin and made him clear his ideas.

The idea of not cutting the actual bit is abandoned, and the cutterhead structure and working mode of the shield machine are studied in order to improve its working efficiency.

The Cutterhead of shield machine is mainly used to loosen, break and excavate soil or rock underground. Due to its huge size, its working speed is not fast, even slow.

After all, if it's fast, the heat generated by friction is amazing.

Chen Xin tried to double the rotation speed of the cutter head of the shield machine, but the result is not the improvement of work efficiency, but the melting and wear of the cutter head on the same cutter head due to high temperature, and finally the whole cutter head is damaged.

This undoubtedly creates great restrictions on Chen Xin, which makes him need to think about a more appropriate scheme.

Although the system upgrade can do things that cannot be done under normal circumstances, the basic physical laws that should be observed should still be observed. If Chen Xin can't improve a reasonable and feasible scheme, even the system upgrade will just create an industrial waste with no practical value.

Therefore, Chen Xin must seriously conceive a reasonable scheme and make a breakthrough while being reasonable, which is also a very arduous task for him.

In particular, he also 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 we're going to work overtime again!" Chen Xin smiled bitterly, but he didn't feel too depressed. Instead, he cheered up and put himself into work.

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