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A visual simulation device and method for metal semi-solid slurry filling process

A semi-solid slurry and simulation device technology, applied in teaching models, instruments, educational appliances, etc., can solve problems such as inapplicability, and achieve the effects of convenient operation, precise and adjustable rotational speed, and good experimental repeatability

Active Publication Date: 2016-04-27
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal semi-solid slurry is neither liquid nor solid, and the primary solid phase particles are uniformly suspended in the liquid phase, which has unique rheological behavior. The fundamental difference from liquid metal is that it has the characteristics of shear thinning. The casting process is constantly changing, and there is a phenomenon of solid-liquid phase separation, so it is obviously different from the metal melt flow behavior of traditional gravity casting, low-pressure casting and other processes. The traditional gating system design principles and experience cannot be applied to metal semi-solid Design of casting molds and gating systems, develop a visual simulation device for the filling and flow process of semi-solid slurry, and then summarize the flow and filling laws of semi-solid slurry, and establish design criteria for molds and gating systems is particularly important

Method used

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  • A visual simulation device and method for metal semi-solid slurry filling process
  • A visual simulation device and method for metal semi-solid slurry filling process
  • A visual simulation device and method for metal semi-solid slurry filling process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The simulated medium used in this implementation example is succinonitrile-water solution, wherein the mole fraction of water is 5%.

[0043] The specific process is as follows:

[0044] (1) will figure 2 and image 3 The shown transparent plexiglass mold 2 is installed on the workbench 15, and its position is fixed with a stopper 16; this mold is mainly used to analyze the semi-solid slurry in the open cavity (the gate or the cross-sectional area of ​​the filling mold increases suddenly). case) flow law and solid phase distribution;

[0045] (2) Pour the configured succinonitrile-aqueous solution (initial temperature is 80 DEG C) into the pulping container 10, then cover the sealing cover and seal the pulping container 10, and the temperature of the water in the constant temperature water tank 11 is set to 45 ℃;

[0046] Open the rotary viscometer 7 to stir the succinonitrile-water solution, the rotating speed of the stirring blade 9 is 50rpm, the succinonitrile-w...

Embodiment 2

[0050] The simulated medium used in this implementation example is succinonitrile-water solution, wherein the mole fraction of water is 8%.

[0051] The specific process is as follows:

[0052] (1) will figure 2 The shown transparent plexiglass mold 2 is installed on the workbench 15, and its position is fixed with a limit block 16; the mold is mainly used to analyze the flow state rules and solid phase distribution of semi-solid slurry such as diversion and convergence;

[0053] (2) Pour the configured succinonitrile-aqueous solution (80° C. of initial temperature) into the pulping container 10, then cover the sealing cover and seal the pulping container 10, and the temperature of the water in the constant temperature water tank 11 is set to 40° C. ;

[0054] Turn on the rotary viscometer 7 to stir the succinonitrile-8% aqueous solution, the rotating speed of the stirring blade 9 is 100rpm, the temperature of the succinonitrile-water solution decreases gradually, and forms...

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Abstract

The invention belongs to the technical field of metal semi-solid cast molding, and particularly relates to a visual simulation device for a metal semi-solid slurry mold filling process and a method. The device is composed three parts of a semi-solid slurry preparation system, a mold filling system and an experiment recording system. According to the theory of similarity, transparent liquid with similar rheological properties to the metal semi-solid slurry, that is, succinonitrile-water semi-solid slurry, is selected to serve as a simulation mold filling medium, the succinonitrile-water solution is firstly prepared to be semi-solid slurry with a specific solid fraction, the semi-solid slurry is then conveyed to a charging barrel of the mold filling system via a conveying pipe, the cavity of a transparent mold is filled under push of an injection piston, the mold filling process is recorded by a high-speed camera, and thereof, visual simulation of the metal semi-solid slurry mold filling process can be realized.

Description

technical field [0001] The invention belongs to the technical field of metal semi-solid casting and forming, and in particular relates to a visual simulation device and method for metal semi-solid slurry filling process. Background technique [0002] Casting is a complex multi-parameter process, such as pouring temperature, speed, gating system size, structure, casting mold, velocity field and temperature field when molten metal is filled, cooling and solidification speed and direction of molten metal will all affect the quality of castings; And the forming process of this material is often carried out in a semi-closed, opaque mold, the flow state of the molten metal, and the changes in the temperature field and stress field during the solidification process are invisible. Casting defects such as porosity, inclusions, sand washing, etc. are related to the flow behavior of the gating system and the liquid metal in the mold. Foundry workers always dream of being able to obser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B25/02B22D27/20
Inventor 张帆朱强李大全和优锋杨福宝
Owner GRIMAT ENG INST CO LTD
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