News

News

Industry News | Laser holograms – a new way to improve the quality of industrial 3D printing tech

Date: 2019-12-27
Views: 238

Industry News | Laser holograms – a new way to improve the quality of industrial 3D printing tech


One of the disadvantages of modern industrial technologies for laser three-dimensional printing is strong heating at the point of contact of the metal with the laser light beam. This heating melts the metal powder, but it also leads to the appearance of areas of internal mechanical tension and deformation of the workpiece. And all these things are practically impossible to predict, which makes it impossible to somehow compensate for them. However, a team of researchers from the University of Cambridge found a way to solve the problem described above. Using special holographic images generated by a computer using complex algorithms, it is possible to control the distribution of laser light energy in three dimensions, which avoids unnecessary heating of the manufactured part.


“Instead of using a single beam of light from a high-power laser, we use several beams of laser light that are focused in a special way at the desired point in three-dimensional space”, says Professor Tim Wilkinson, project manager, “This allows us to print parts in a more three-dimensional way, and avoid the occurrence of thermal deformation”.


The hologram used to print a three-dimensional object is calculated and changed by a computer at a speed of about a thousand times per second to improve control over the distribution of energy. At the same time, the algorithms that produce the control hologram take into account a number of subtleties, such as the properties of the materials used, optical distortions, current temperature, etc. “This holographic approach allows us to do things that were impossible to do before. There are certain types of structures that cannot be printed due to thermal deformations,” says Professor Wilkinson.


Now scientists have already created an experimental setup with three lasers, the rays of which are reflected from the silicon “microdisplay”, a thin layer of liquid crystals on the surface of a silicon chip, which acts as a controlled diffraction grating and changes the phase of the reflected laser light beam. And in the near future, Cambridge researchers plan to create a more advanced installation in which eight lasers will be used, with a total power of 200 W, which is enough to melt particles of aluminum powder.


In addition to checking the operation of liquid crystal microdisplays at this level of laser light power, scientists, with the help of a new installation, will work with metal powders with the addition of plastics and resins to improve the algorithms for composing control holograms. According to plans, a new and more powerful installation will begin to work in 2020, and this project, which should result in a fully operational industrial installation, will be completed by 2022.


Via: https://freenews.live

Note: Content may be edited for style and length.




News / Recommended news More
2020 - 01 - 22
Shipments of industrial-class 3D printers (priced above $100,000) were up by more than 8% in Q3 2019 compared with the same period the previous year, according to market intelligence from Context (London). This key sector, which accounted for almost 70% of all 3D printer revenues for the period, saw even more impressive shipment growth of 12% on a trailing 12-month basis.“The increase came as a su...
2020 - 01 - 16
Researchers at RMIT have found that sound vibrations can improve the micro-structure of 3D printed alloys.The team used high frequency sound waves to make the alloys more consistent and stronger than those printed conventionally. Lead author, Carmelo Todaro, highlighted that the method deals with inconsistencies in 3D printed alloys.“If you look at the microscopic structure of 3D printed alloys, t...
2020 - 01 - 10
The U.S. Army has demonstrated its interest in additive manufacturing over the years, but according to service secretary Ryan McCarthy, it’s now time to really ramp up adoption. At a recent press event at the Reagan National Defense Forum, McCarthy emphasized how crucial 3D printing will become to the military, especially for the production of spare parts.Presently, the U.S. military is using addi...
2020 - 01 - 03
Over the years, additive manufacturing has become prominent in different industries and has significantly influenced automotive and aerospace manufacturing . And now, the use of additive manufacturing, also referred to as 3D printing, is attracting the interest of the oil and gas industry.According to a report,  the research company explores how 3D printing is emerging as a key technolog...
Share:
Uniris Exhibition Shanghai Co., Ltd.
Shanghai Branch 
Tel: 4000 778 909 
E-mail:irisexpo@163.com
Guangzhou Branch
Tel:020-8327 6389
Email:pmchina@unifair.com
PM CHINA Official Website
犀牛云提供企业云服务
Scan the QR code to visit the official website by phone