Discussion on the technological method of metal additive manufacturing technology

Date：2018/08/18Type：Company News

Keywords：广东大宏新材,金属粉末注射成形,MIM技术,MIM新材料,粉末冶金,精密复杂零件,精密结构件,一次成形,脱脂烧结,MIM手机零件,MIM智能穿戴,MIM陶瓷应用,MIM汽车零件,MIM医疗器械，粉末冶金微型齿轮，粉末冶金小模数齿轮

Increase material Manufacturing (i.e. Manufacturing, AM) commonly known as 3 d printing, combined with computer aided design, materials processing and forming technology, based on the digital model file, with numerical control system by software will be special metal materials, non-metallic materials and medical biological materials, according to the extrusion, sintering, melting, curing light, injection methods such as step by step accumulation, create entity Manufacturing technology of the item. Compared with the traditional processing mode of raw material removal, cutting and assembly, it is a "bottom-up" manufacturing method, which starts from nothing. This makes it possible to manufacture complex structural parts that are constrained by traditional manufacturing methods.


Additive manufacturing technology refers to the scientific and technological system of directly manufacturing parts based on the discrete - stacking principle and driven by the three-dimensional data of the parts. Based on different classification principles and understanding methods, additive manufacturing technology also has various terms such as rapid prototype, rapid forming, rapid manufacturing and 3D printing. Its connotation is still deepening and its extension is also expanding. The meaning of "additive manufacturing" here is the same as that of "rapid forming" and "rapid manufacturing".

At present, more mature manufacturing technologies for metal amplification mainly include laser fusion, laser fusion deposition, electron beam smelting, etc. Each process method has a relatively mature product supply market. Now by guangdong dahong new materials small make up to introduce these three processes：


1、Selection laser fusion


Preselected laser fusion (SLM) process is a 3D model of the workpiece, which is firstly layered, and then the scanning system is used to control the laser beam to irradiate the material in the molding area, and selectively melt the metal powder. After the scanning of each layer of slices is completed, the feeding system completely covers the formed area with new powder, and the two actions are repeated continuously until the scanning of all slices is completed, and the accumulated shaping of the workpiece is finally realized.


2、Laser fusion deposit


Laser fusion deposition (LMD) is also known as direct laser fabrication. In general, high-power laser is adopted. The feeding mode is mostly synchronous powder feeding. Compared with traditional manufacturing process, this method has high flexibility and short process, which can significantly reduce the cost and time of finished products. It has great potential in producing small batch and high-value metal parts.


3、Electron beam melting


Electron beam melting (EBM) is a process of forming metal powder by means of electron beam under high vacuum. Vacuum condition and electron beam are the main differences between EBM and LMD and SLM. The parts manufactured by EBM technology have good density and high strength.


For more information on powder metallurgy of metals, please consult guangdong dahong new materials.


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