Doomsday Bunker Upgrade Chapter 405: Printing Robot

As we all know, metals exist in a combined state in nature, forming so-called compounds.

Only those extremely inactive metals exist in the form of elemental substances, such as gold, silver, platinum, palladium... These precious metals are also called inert metals because of their stable properties and are not easy to react with other substances .

So most of the metals that humans can obtain in nature are minerals that exist in the form of compounds, and new metal elements can only be obtained after smelting.

However, the physical properties of pure metal elements are single, and many times they cannot meet the needs of use.

For example, the well-known iron, in fact, pure iron is very soft. Only when it forms an iron-carbon alloy with carbon can it have a hard texture.

And depending on the temperature, the lattice arrangement in the iron crystal is also different. According to this physical property, the iron-carbon alloy with different properties can be obtained by processing the iron-carbon alloy at different temperatures, that is, Usually we call it steel.

Humans have a very long history of using alloys, dating back to the ancient Babylonians more than 6,000 years ago, who were the earliest known civilizations to smelt bronze, that is, copper-tin alloys.

The Yan Kingdom also began to use alloys a long time ago. In the Shang Dynasty more than 3,000 years ago, the ancestors of the Yan Kingdom people were already smelting and using bronze on a large scale, and they could even process it through forging. way to get a sharp sword.

The famous Yue King Goujian sword is still so sharp even thousands of years later that it can cut more than a dozen layers of paper with a single stroke.

So in human life, alloys can be said to be everywhere.

But it is still very difficult to 3D print alloys.

First of all, in theory, this can indeed be done, because the definition of alloy is a solid product with metallic properties obtained by mixing and melting a metal with another or several metals or non-metals, cooling and solidifying .

So to use 3D printing to print alloys, theoretically, it is only necessary to mix the single metal raw materials according to the required ratio, and then process them by laser to obtain the required alloys.

However, it is not easy to do so.

First of all, the mixing of metal powder must be very uniform in the overall ratio of raw materials for each sintering. Otherwise, there will be errors in the metal ratio, and there will be problems in the properties of the printed materials, which will destroy the overall quality of the printed products. structure.

Bluestar had laser 3D printing technology before the disaster, and someone even printed a set of Iron Man armor in titanium, which was resistant to rifle fire.

However, all of this is to spread metal powder in a layer of only about 0.1mm or even a few microns in a closed device, and then use a laser to sinter the area to be printed.

This is repeated, layer by layer sintering, before the parts can be printed.

During this process, if there is airflow disturbance, the unsintered metal powder will be blown away directly.

Aside from the interference caused by slow efficiency and airflow disturbance, limited by the strict conditions, it is difficult to print large parts, and it is also impossible to print alloys.

If only powder particles that have been processed into alloys are sintered, it is naturally very simple, but it is not so easy to process different elemental metals into alloys.

Because a very important factor here is temperature.

Sintering is processing at a temperature slightly lower than the melting point of the material to bond the powder particles. However, if you want to process materials of different elements into alloys, it is obviously impossible to rely on sintering alone, and the material needs to be truly melted.

And more importantly, in order to obtain some special alloys, the processing temperature is even much higher than the melting point of the material, and the temperature needs to be maintained for a certain period of time to fully change the material properties.

And these are precisely the places where 3D printing technology is difficult to achieve.

But these are not a problem for Chen Xin. He melts the elemental metal powder particles with a laser, mixes different metal elements together to form an alloy, and then cools and sinters the alloy to become the required parts. The 3D printer he created can be done.

And Chen Xin's 3D printer does not print through a fixed frame and print head like traditional equipment, but looks like a small robot.

A small robot carries a portion of the raw material, and then melts the raw material into an alloy according to a pre-designed program, and then prints it.

With enough robots, a large part can be printed very quickly.

This technique is inspired by some sci-fi games where so-called nanorobots are often used to create objects through 3D printing, which Chen Xin draws on formally.

It's just that he didn't make the robot so small, but made it into the style of a small drone.

After agreeing to make a small prototype for the engineering and technical personnel, Chen Xin quickly completed the prototype through the workbench and robotic arm in the shelter, and also upgraded it.

"This...this is really amazing!" The engineers and technicians watched as this small drone-like 3D printing robot printed a miniature model of the Eiffel Tower in front of their eyes, and couldn't help but marvel. Seems to be out of words.

“This is the small prototype of the 3D printing equipment I am talking about~IndoMTL.com~ It can be made larger or smaller according to the actual needs of use, but this size is more general for various Occasion." Chen Xin showed the prototype of this 3D printing equipment and introduced: "It can carry about two kilograms of raw materials at a time, which can be processed alloy powders or metal powder mixtures. And it can be printed online with multiple devices to print out the required large metal components.”

"With this, building construction will be much easier!" The engineers and technicians have already begun to imagine hundreds of such 3D printing robots will start construction at the same time, allowing buildings to grow like bamboo shoots in the ground screen.

"Well, not only for building construction, this can also be used for mechanical manufacturing and metal processing. The advantage of using 3D printing is that the printing accuracy is sufficient, the printed metal parts do not even need to be reworked, and no matter what shape you need How weird, for 3D printing, it can be realized." Chen Xin looked at the excited look of the engineering and technical personnel, and said with a smile: "For some fields that require high-precision parts, this is very useful."

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