Rapid composite precision manufacturing method for a metal part

A technology for precision manufacturing and metal parts, applied in the field of rapid metal parts manufacturing, it can solve the development constraints and complex structures of rapid metal parts manufacturing, and achieve the effect of flexible and diverse material types and widening process applicability

Active Publication Date: 2012-05-16
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the former is restricted by the processing range, processing time, and cost of sintering equipment, while the latter is restricted by the complex structure and surface quality of parts. big constraints

Method used

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  • Rapid composite precision manufacturing method for a metal part
  • Rapid composite precision manufacturing method for a metal part
  • Rapid composite precision manufacturing method for a metal part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] A method for rapid manufacturing of metal parts based on composite precision cores, the process of which is as follows:

[0022] According to the drawing of the metal part, generate the 3D CAD model of the part, and generate the core model corresponding to the 3D CAD; according to the core structure, size, performance and other required factors, split the model into several sub-modules, and design the joints of the sub-modules The connection positioning structure is convenient for later grouping,

[0023] The positioning structure described is as figure 2 As shown, the gravity of the sub-module 1 is used to closely fit the two outer convex round tables 2 and the inner concave round table 3 for positioning, so that the center lines of the two round tables are completely overlapped together, reaching the sub-module 1 Accurate cooperation with the sub-module 4; the friction coefficient between the sand blocks is large, and the matching round table has a certain shear res...

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Abstract

The invention relates to a rapid composite precision manufacturing method for a metal part. The method comprises the following steps: 1, segmenting a three-dimensional CAD (computer aided design) model according to the structure, the dimension and performances of a part on the basis of characteristics of the structure of the part, and applying a laser sintering technology to a complex structure submodule to obtain a (core) shell; 2, obtaining a large dimension and simple structure submodule through a modeling-free numerical control machine tool processing technology; and 3, combining the submodules obtained through the two technologies, and casting them to form an entity. The method which combines the high precision of the laser sintering and the rapidness of the modeling-free numerical control processing allows high precision products according with requirements to be rapidly processed, and the method is especially suitable for the individual small batch manufacturing

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, in particular to a rapid manufacturing method for metal parts. Background technique [0002] With the acceleration of the replacement of product parts, the manufacturing industry has an increasing demand for metal parts, especially complex metal parts. The rapid manufacturing and forming technology of metal parts has always been a hot research topic at home and abroad. Especially in key industries such as aviation, aerospace, military industry, automobiles, and machine tools, the core components are generally metal complex structural parts. Traditional precision casting production needs to process and manufacture auxiliary tools such as templates, core boxes, and molds. There are long manufacturing cycles, There are obvious shortcomings such as many processes and high cost, which cannot meet the needs of rapid manufacturing of single and small batch components. [0003] At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04
Inventor 单忠德刘丰徐先宜顾兆现
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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