Micro component liquid forming method conducted under composite action of multiple physical fields

A composite effect and multi-physics technology, applied in the direction of casting mold components, casting molding equipment, casting molds, etc., can solve problems such as unstable mechanical properties and incomplete forming of micro-components, and achieve excellent surface quality, complete forming, and improved The effect of mechanical properties

Active Publication Date: 2019-02-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problems of incomplete micro-component formation and unstable mechanical properties in the existing single force field forming process, and proposes a micro-component liquid forming method with multi-physical field composite action

Method used

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  • Micro component liquid forming method conducted under composite action of multiple physical fields
  • Micro component liquid forming method conducted under composite action of multiple physical fields
  • Micro component liquid forming method conducted under composite action of multiple physical fields

Examples

Experimental program
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specific Embodiment approach 1

[0021] Specific implementation mode 1: In this implementation mode, a micro-component liquid forming method with multi-physics field composite action is carried out according to the following steps:

[0022] 1. Using additive manufacturing technology to make plastic micromodels, using paraffin to make casting system wax models;

[0023] 2. The plastic micromodel prepared in step 1 is welded with the casting system wax film to obtain the plastic micromodel;

[0024] 3. Mix ultra-fine precision casting gypsum powder, gypsum retarder, defoamer and deionized water, and fully stir to obtain gypsum slurry;

[0025] 4. Use the gypsum slurry prepared in step 3 to embed the plastic micromodel obtained in step 2 to obtain a gypsum cast, then place the gypsum cast in a vacuum environment, solidify and form under the action of ultrasound; then dry naturally, and then put Dewaxing and demoulding are carried out in a resistance furnace with a preheating temperature of 70-350°C, and then co...

specific Embodiment approach 2

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mesh number of the ultra-fine precision casting gypsum powder in step 3 is greater than 200 mesh. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 3, the gypsum retarder is citric acid, and the defoamer is silicone oil. Others are the same as in the first or second embodiment.

[0031] The plaster mold does not need to add fillers (such as quartz powder, glass fiber, etc.) commonly used in traditional plaster molds.

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Abstract

The invention relates to the field of a micro component liquid forming method, in particular to a micro component liquid forming method conducted under the composite action of multiple physical fields, and aims at solving the technical problems that in the existing single force field forming process, micro component forming is incomplete, and mechanical performance is not stable. The method comprises the steps that a micro model is made, and model assembling is conducted; a gypsum casting mold is prepared through assisting of the multiple physical fields; dewaxing and casting mold roasting areconducted; metal fusion is conducted through assisting of an electric field; pouring forming is assisted through the multiple physical fields; and demoulding and cleaning are conducted, and a metal micro component is obtained. According to the method, subsequent machining is not needed, one-time forming can be achieved, the micro component is integrally formed, and the surface quality is excellent. The method is used in the field of metal micro component forming.

Description

technical field [0001] The invention relates to the field of micro-component liquid forming methods. Background technique [0002] With the continuous deepening of the application of various commercial micro-products in military, civil and aerospace fields, the processing methods of micro-components are also constantly enriched. From the surface etching technology and LIGA technology initially applied to silicon-based materials, to the micro-EDM technology, ultra-precision machining technology and micro-forming technology applicable to metal materials. Moreover, as the proportion of metal materials in micro-products continues to increase, the micro-forming technology that can be used for the processing and shaping of metal micro-components has also attracted more attention. Among the above-mentioned technologies, the micro-hydroforming method, as a near-net forming technology that can efficiently and rapidly process highly complex metal micro-components, has always been the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22D27/09B22D27/15
CPCB22C9/04B22D27/09B22D27/15
Inventor 任明星徐杰任洋
Owner HARBIN INST OF TECH
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