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Method for printing metal part through prefabricated sand mold additive manufacturing

A technology for metal parts and additive manufacturing, which is used in the field of complex metal parts based on powder feeding/wire feeding of prefabricated sand molds. effect of demand

Active Publication Date: 2019-09-17
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Method for printing metal part through prefabricated sand mold additive manufacturing
  • Method for printing metal part through prefabricated sand mold additive manufacturing
  • Method for printing metal part through prefabricated sand mold additive manufacturing

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Embodiment Construction

[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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PUM

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Abstract

The invention belongs to the technical field of additive manufacturing, and provides a method for printing a metal part through prefabricated sand mold additive manufacturing. The method is characterized in that firstly a prefabricated sand mold part is prepared through a 3D ink-jet printing technology, a metal part is printed at a printing position of the prefabricated sand mold part by using metal powder, then a metal support is printed, the metal powder is sprayed on the surface of the prefabricated sand mold after each printing to perform surface treatment until the metal part and the metal support are formed, the prefabricated sand mold part is dissolved by using a dissolving agent, and mechanical machining is adopted and used for removing the metal support and a base plate to obtain the metal part. According to the method, the defect that printing is failed due to the fact that a molten pool is collapsed due to the structure-free support not exists in the powder feeding / wire feeding printing stage is overcome, redundant mechanical machining is avoided, the forming cost of the metal part with complex structure is reduced, and the market demand is met.

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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Application Information

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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 UNIV OF TECH