Application No./Patent No.: 2018104171977 Application date: 2018-05-03.
Inventor/Designer: Cao Yu, Ye Zongyi, Xue Wei, Li Tao, Yang Huan, Pan Qiaofei and Yu Yanling.
The invention provides a metal three-dimensional printing forming method based on nanometer temperature size effect, which comprises the following steps: preparing a CAD data file of a three-dimensional printing forming part, a forming substrate, metal nano powder and a nano powder spraying array plate; Heating to keep the formed substrate and the formed part at the set temperature all the time; Take the slice data of the current slice, control and open the corresponding microtube injection valve according to the corresponding partitioned cell block, so that the metal nano-powder flows out from the microtube, then vertically impacts the current molding surface, fuses with the current molding surface through melting, leveling and solidification, increases the thickness of the corresponding cell block to a certain extent, and repeats until all layers are completely molded. According to the invention, the process idea that the temperature of the formed substrate and the formed part is lower than the melting point of the block and higher than the melting point of the metal nano powder is skillfully utilized, and the melting effect assisted by the high-energy beam is not needed, so that the ultra-fine and ultra-high-speed three-dimensional parts three-dimensional forming based on the nano metal powder is realized.
