Method for printing metal parts by additive manufacturing of prefabricated sand moulds
A technology for metal parts and additive manufacturing, which is applied in the field of printing complex metal parts based on prefabricated sand mold powder feeding/wire feeding, can solve the problems of not improving the laser melting deposition molding ability, reduce molding costs, avoid mechanical processing, and satisfy the market effect of demand
Active Publication Date: 2020-04-24
NANJING TECH UNIV
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Problems solved by technology
Additive manufacturing has not improved the ability to form complex parts with laser melting deposition (powder fed printing) and arc additive manufacturing technology (wire fed printing), so this problem needs to be solved urgently
Method used
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[0039]In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.
[0040] Aspects of the invention are described in this disclosure with reference to the accompanying drawings, which show a number of illustrated embodiments. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of numerous ways, since the concepts and embodiments disclosed herein are not limited to any implementation. In addition, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.
[0041] According to the disclosure of the present invention a method aimed at the additive manufacturing of printed metal par...
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Abstract
The invention belongs to the technical field of additive manufacturing, and proposes a method for additively manufacturing and printing metal parts through prefabricated sand molds. First, the prefabricated sand mold is prepared by 3D inkjet printing technology, and then metal powder is used to print metal parts at the printing position of the prefabricated sand mold, and then the metal support is printed, and the surface of the prefabricated sand mold is sprayed with metal powder for surface treatment before each printing, until Metal parts, metal support molding is completed. Dissolve the prefabricated sand mold with a solvent, and finally use machining to remove the metal support and substrate to obtain metal parts. The present invention prevents the defect that the molten pool collapses due to no structural support in the powder feeding / wire feeding printing stage, thereby causing printing failure, and the present invention avoids redundant mechanical processing, reduces the molding cost of metal parts with complex structures, and satisfies the market demand .
Description
technical field [0001] The invention relates to the field of additive manufacturing, and specifically proposes a method for printing complex metal parts based on prefabricated sand mold powder feeding / wire feeding in additive manufacturing. Background technique [0002] 3D printing is now widely used in the field of casting. The commonly used technologies are: Fused Deposition Rapid Prototyping (FDM), Stereolithography (SLA), Selective Laser Sintering (SLS), and Modelless Casting Manufacturing (PCM). ), 3D inkjet printing technology (3DP). 3DP is an ideal molding method to replace traditional casting molds and cores. The molding process does not require operations such as molds and sand mixing, and it perfectly integrates traditional industries and additive manufacturing technologies. The use of 3DP to produce molds and cores not only promotes the development of 3D printing, but also promotes the technological innovation of the foundry industry. [0003] Sand printing The ...
Claims
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IPC IPC(8): B22F3/105B33Y10/00
CPCB33Y10/00B22F10/00B22F10/36B22F10/40B22F10/66Y02P10/25
Inventor 孙中刚嵇书伟陈小龙常辉
Owner NANJING TECH UNIV