What is the role of 3D printing technology and what is the significance of 3D printing technology?

It is possible to print a three-dimensional thing in its entirety.

It can be said that it is a revolutionary technology that emerged last year, and its arrival may be comparable to the computer age.

Theoretically, when 3D printing technology matures, with the addition of different printing materials, you can print anything, including human organs (raw materials are cells), houses (raw materials are building materials), machinery (raw materials are metals), etc., and you can print exactly the same as you want, as long as you set the shape of the things you want to print in front of the computer.

In the future, it may be possible to send only a 3D printer and building materials to the moon or Mars, and the 3D printer can print out the lunar base, and then the astronauts can go up and live there; If you are sick and want to replace an organ, you don't need to find a matching organ source, just take some stem cells from the patient and culture them to become printing raw materials, and then print out an identical organ for transplantation, and there are no immune complications; High-rise buildings don't need so many people, just a large 3D printer, add building materials such as cement and metal, and then automatically print the building.

The prospects are great and therefore revolutionary.

However, at present, because it is a concept, 3D printers are not only expensive, but also have limited functions, usually using resin to print plastic objects, but the computer can only calculate four operations at the beginning.

The purpose of 3D printing training is to let students understand and master the principles, operation methods and application scenarios of 3D printing technology, cultivate students' innovative thinking and hands-on ability, and improve students' comprehensive quality. Specifically, the significance of 3D printing training includes the following points:

1.Pioneering and innovative thinking: 3D printing training encourages students to find inspiration in innovation and design, and stimulates students' innovative thinking and creativity.

2.Improve hands-on ability: 3D printing training requires students to carry out manual operations, constantly adjust and optimize the design scheme, so as to improve students' ability to move and return to the hands and practical ability.

3.Master 3D printing technology: 3D printing training allows students to understand the principles and operation methods of 3D printing technology, master the use of 3D printing software, so as to improve the technical level of students.

4.Cultivating teamwork spirit: 3D printing training usually requires students to work in groups to complete projects, cultivating students' teamwork spirit and communication skills.

5.Improve the quality of comprehensive literacy: 3D printing training improves the comprehensive quality of students through the whole process of designing, making and displaying products, including innovation, teamwork, communication, and problem solving.

In short, 3D printing training is a practical activity with practical significance and educational value, which can provide useful support and help for students' future development.

3D printing (3DP) is a type of rapid prototyping technology, which is a technology that uses adhesive materials such as powdered metal or plastic to construct objects based on digital model files.

3D printing is usually achieved by using digital technology material printers. It is often used in mold manufacturing, industrial design and other fields to make models, and then gradually used in the direct manufacturing of some products, and there are already parts printed using this technology.

The technology is used in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, GIS, civil engineering, firearms, and other fields.

Some technologies also use supports in the printing process, such as when printing some upside-down objects, you need to use something that is easy to remove (such as a soluble thing) as a support.

The printer reads the cross-sectional information in the file, prints these sections layer by layer with liquid, powder, or sheet material, and then glues the layers together in various ways to create a solid. The peculiarity of this technique is that it can create objects of almost any shape.

The thickness of the cross-section (i.e., the z-direction) and the resolution of the plane (i.e., x-y) are calculated in dpi (pixels per inch) or microns. The general thickness is 100 microns, i.e. millimeters, but there are also some printers such as the Objet Connex series and 3D Systems'The ProJet series can print a layer as thin as 16 microns. In the plane direction, it can print with a resolution similar to that of a laser printer.

The printed "ink droplets" are typically 50 to 100 microns in diameter. Fabricating a model using traditional methods typically takes hours to days, depending on the size and complexity of the model. With 3D printing, the time can be reduced to hours, depending on the printer's performance and the size and complexity of the model.

Traditional manufacturing techniques such as injection molding can be used to manufacture polymer products in large quantities at a lower cost, while 3D printing technology can produce relatively small quantities of products in a faster, more flexible and lower cost manner. A desktop-sized 3D printer can meet the needs of designers or concept development teams to build models.

Folding complete. The resolution of current 3D printers is sufficient for most vertical applications (it can be rough on curved surfaces, like jagged on an image), and higher resolution items can be obtained by first punching a slightly larger object with the current 3D printer, and then slightly sanding the surface to obtain a smooth "high-resolution" object.

3D printing is mainly divided into three categories according to its use: industrial field, cultural and creative field, and biomedical field. According to the working principle of printing, it can be divided into five categories, namely direct metal laser sintering (DMLS), three-dimensional powder shielding bonding (3DP), selective laser sintering (SLS), stereolithography (SLA) and fused deposition modeling (FDM).

The following is an explanation of the types of raw materials and the characteristics of the products produced by each category.

First of all, direct metal laser sintering (DMLS) can support almost any alloy material raw materials, with high precision, high strength, fast speed, finished surface light and other characteristics, generally used in aerospace and industrial parts manufacturing industries, can be used for high-end mold design, etc.

Secondly, three-dimensional powder bonding (3dp) supports the printing of raw materials such as ceramic powder, metal powder, plastic powder, etc., which uses a nozzle to spray the adhesive on the area to be molded, so that the material powder can be bonded, and a variety of colors can be superimposed at the same time, which is slightly inferior in terms of strength and fineness.

Third, selective laser sintering (SLS) technology can support raw materials such as thermoplastic powders, metal powders, and plastic powders, which use nozzles to spray adhesives on the area to be molded, so that the material powders can be bonded, and multiple colors can be stacked at the same time, which is slightly poor in terms of strength and fineness.

Thirdly, stereolithography (SLA) technology mainly supports liquid photopolymers, which are generally used in the commercial field. This technology was the first to be commercialized, and its characteristics are that the liquid resin is cured after encountering the laser, which has a high fineness, and the defects are manifested in the high cost, and its raw material, the liquid photosensitive resin, is toxic and harmful to the human body.

Finally, there is a need for improvement in fused deposition or merging (FDM) technology, which supports raw materials such as solid hot melt plastics, eutectic system metals, edible materials, etc. FDM technology requires heating the printer head to first soften the hot-melt bar plastic, and then print the molding, which is the simplest way in the field of 3D printing and can generally be applied to individuals. This technology is used in the intelligent 3D printer, which is known as the most cost-effective 3D printer.

A molding technology based on digital technology, the technology of completing processing through layer by layer, is not very esoteric in terms of technology, and it is also very easy to understand the hypothesis.

Before this technology was called rapid prototyping, the technology from 86 years to the launch of industrial-grade rapid prototyping machine equipment as a symbolic starting point, combined with modern material cleaning and material chemical technology (now there are more and more types of material molding), mechanical technology (also began to use robotic arms to do), optical technology (laser scanning molding, there are all kinds of light molding, as well as with mobile phone screens), physical technology (hot melt cooling, nozzles, etc.) combined, no matter what kind of technology, As long as it conforms to the above molding principles, it can be called 3D printing.

3D printing (English: 3D printing) is a kind of rapid prototyping technology, which is a kind of digital model file-based, using powder-like metal or plastic and other bondable materials, through the way of stacking and accumulating layers to construct objects (i.e., lamination method). In the past, it was often used to make models in mold making, industrial design and other fields, and now it is gradually being used in the direct manufacturing of some products.

In particular, some high-value applications (such as hip dead joints or teeth, or some aircraft parts) have been printed using this technology, which means that 3D printing is popular.