Chapter 405: Printing robot

As we all know, metals exist in a chemical state in nature, that is, they form so-called compounds.
Only those extremely inactive metals exist in the form of simple substances, such as gold, silver, platinum, palladium... These precious metals are also called inert metals because of their stable properties and difficult to react with other substances.
Therefore, most of the metals that humans can obtain in nature are minerals in the form of compounds, and new metal elements can only be obtained after smelting.
However, a simple metal element has a single physical property, and in many cases it cannot meet the needs of use.
For example, the well-known iron, in fact, the simple element of iron is very soft, and only when it forms an iron-carbon alloy with carbon can it have a hard texture.
Moreover, depending on the temperature, the lattice arrangement in the iron crystal is also different. According to this physical property, the iron-carbon alloy can be processed at different temperatures to obtain iron-carbon alloys with different properties, that is, in the usual sense. What we commonly call steel.
Mankind has a long history of using alloys. It can be traced back to the Babylonians more than 6,000 years ago. They are the earliest known civilization that began smelting bronze, that is, copper-tin alloy.
Yan country also began to use alloys a long time ago. In the Shang Dynasty more than 3,000 years ago, the ancestors of Yan people had already smelted and used bronze on a large scale, and even obtained sharpness through forging and other processing methods. Sword.
The famous Yue Wang Goujian sword is still extremely sharp even thousands of years later, and it can cut more than ten layers of paper with a single stroke.
Therefore, in human life, alloys can be said to be everywhere.
But it is still very difficult to use 3D printing to print alloys.
First of all, theoretically, this can indeed be done, because the definition of an alloy is a solid product with metallic properties obtained after a metal and another or several metals or non-metals are mixed and melted and cooled and solidified.
Therefore, using 3D printing to print alloys, in theory, only need to mix the metal raw materials according to the required ratio, and then process them by laser to obtain the desired alloy.
However, it is not easy to do this.
First of all, the mixing of metal powder must ensure that the overall ratio of the raw materials for each sintering is very uniform, otherwise the metal ratio will cause errors, and the printed material properties will also have problems, which will destroy the overall structure of the printed product.
Before the disaster, Blue Star already had laser 3D printing technology, and some people even printed a set of Iron Man armor out of titanium, its performance can withstand rifle shooting.
But this is to spread the 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 that needs to be printed.
After repeated sintering layer by layer, the parts can be printed.
In this process, if there is air flow disturbance, it will directly blow away the unsintered metal powder.
Aside from the interference caused by slow efficiency and air turbulence, it is limited by harsh conditions, so it is difficult to print large parts, and it is impossible to print alloys.
If it is only the sintering of powder particles that have been processed into alloys, it is naturally very simple, but it is not that easy to process different elementary metals into alloys.
Because there is 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 different elementary materials into alloys, it is obviously impossible to rely on sintering alone, but the material needs to be melted.
And the more critical point is that 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 make the material properties fully change.
And these are precisely the places that are difficult to achieve with 3D printing technology.
But these are not a problem for Chen Xin. The simple metal powder particles are melted with a laser, so that different metal elements are mixed together to form an alloy, and then the alloy is cooled and sintered to become the required parts. All the 3D printers he manufactured can do To.
Moreover, the 3D printer manufactured by Chen Xin does not print through a fixed frame and print head like traditional equipment, but looks similar to a small robot.
A small robot carries a part of the raw materials, then melts the raw materials into alloys according to a pre-designed procedure, and then prints them.
With enough robots, a large part can be printed quickly.
This technology is inspired by some science fiction games, in which so-called nano robots are often used to make objects through 3D printing, and Chen Xin borrowed from this formal point.
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 engineers and technicians, Chen Xin quickly completed the prototype through the workbench and robotic arm in the refuge, and upgraded it.
"This...this is really amazing!" The engineers and technicians looked at the small 3D printed robot like a drone and printed out a miniature model of the Eiffel Tower in front of their eyes. They couldn't help but be amazed but they seemed to have words. Poor.
"This is the small prototype of the 3D printing equipment I'm talking about~EbookFREE.me~ Depending on the actual use needs, it can be made larger or smaller. This size is more commonly used in various occasions. "Chen Xin showed the prototype of this 3D printing device while introducing it: "It can carry about two kilograms of raw materials each time, which can be processed alloy powders or metal simple powder mixtures, and It can be printed online by multiple devices to print out the large metal parts needed."
"With this, building construction has become much easier!" In the minds of engineers and technicians, hundreds of these 3D printing robots are starting to work at the same time, so that the buildings will grow out like bamboo shoots in the ground.
"Well, not only for construction, it can also be used for mechanical manufacturing and metal processing. The advantage of using 3D printing is that the printing accuracy is sufficient, and the printed metal parts do not even need to be reprocessed, and no matter how weird the shape you need, For 3D printing, it can be achieved." Chen Xin looked at the engineers and technicians excitedly, and said with a smile: "For some fields that require high-precision parts, this is very useful."
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