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Method and device for preparing semi-solid state slurry through intensive cooling stirring

A technology of semi-solid slurry and stirring shaft, which is applied in the field of compound stirring semi-solid slurry continuous preparation equipment, can solve the problems of reducing the strong stirring effect of complex agitators, the melt is easily involved in gas, and the process is unstable, so as to reduce the Potential air entrainment problem, stable process and high flexibility

Active Publication Date: 2016-06-15
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the existing stirring technology and devices, the present invention provides a method and device for preparing semi-solid slurry with enhanced cooling and stirring, which reduces the strong stirring effect of the complex stirrer and increases the cooling effect of the stirring shaft at the same time. In addition to the equipment structure, the cooling nucleation preparation capacity is increased, the equipment and process stability are increased, and the device for preparing semi-solid slurry in the prior art is easy to hang material, gas is easily involved in the melt, the preparation takes a long time and the process is unstable. other technical issues

Method used

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  • Method and device for preparing semi-solid state slurry through intensive cooling stirring

Examples

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example 1

[0019] In this example, the rotary joint (1) adopts a composite inner tube fixed type, and the forced cooling and stirring equipment is combined with a die-casting machine to prepare rheological die-casting moldings. First, adjust the rotating stirring shaft (4) to an appropriate speed, turn on the circulating cooling water, the water enters from the cooling medium inlet pipe (9), passes through the cooling inner pipe (5), and then passes through the cooling inner pipe (5) and the rotating stirring shaft (4 ), and finally flows out from the cooling medium outlet pipe (10); the mechanical arm of the die-casting machine controls the crucible or ladle (6) to take the aluminum alloy melt in the melting furnace (superheat degree 0~100°C), and move it to Fixed position; use the lifting device to control the rotating stirring shaft (4) to drop to a certain depth below the liquid surface of the alloy melt in the ladle and stir the alloy melt; when the stirring time is fixed or the melt...

example 2

[0021] In this example, the rotary joint (1) adopts the composite inner tube rotary type, the cooling inner tube rotates with the rotating stirring shaft (4), and the forced cooling stirring equipment is combined with the die forging machine to prepare semi-solid die forging parts. First, adjust the rotating stirring shaft (4) to an appropriate speed, and then pass in the cooling gas. The cooling gas enters from the cooling medium inlet pipe (9), passes through the cooling inner pipe (5), and then passes through the cooling inner pipe (5) and the rotating stirring shaft ( 4) and finally discharged from the cooling medium outlet pipe (10); use the mechanical arm to control the crucible or ladle (6) to hold the light alloy melt in the melting furnace (superheat degree 0~100°C), and move to Fixed position; use the lifting device to control the rotating stirring shaft (4) to drop to a certain depth below the liquid surface of the alloy melt in the ladle and stir the alloy melt; whe...

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Abstract

The invention discloses a method for preparing semi-solid state slurry through intensive cooling stirring. The method comprises the following steps: placing overheated alloy melt in a crucible or a casting ladle, descending a rotary stirring shaft internally introduced with a circular cooling medium in the alloy melt through a lifting device, driving the convection heat exchange of the alloy melt through stirring, continuously cooling the rotary stirring shaft through the circular cooling medium, stirring for a fixed period of time or cooling the melt to a set temperature, raising the rotary stirring shaft to prepare the semi-solid state slurry and form an ingot casting; closing the casting ladle containing the semi-solid state slurry to formation equipment and pouring the semi-solid state slurry into a cavity or material chamber of the formation equipment to take the shape; and taking out a formed part and moving the crucible or the casting ladle back to an original position and filling the overheated alloy melt to perform the next semi-solid state slurry preparation. The invention further provides a device for realizing the above method. Through the adoption of the method and device provided by the invention, large volume of semi-solid state slurry can be prepared once, and the semi-solid state slurry can be continuously produced in batch, and then the rheolytic formed part can be prepared through the combination of pressure casting, rolling, die-forging and other conventional formation equipment.

Description

technical field [0001] The invention relates to a compound stirring semi-solid slurry continuous preparation device and method, belonging to the technical field of semi-solid metal processing. Background technique [0002] Since the early 1970s, researchers such as MC Flemings of the Massachusetts Institute of Technology created the concept of metal semi-solid forming, and the preparation and forming technology of semi-solid metal paste has attracted widespread attention from all over the world as a new technology. Semi-solid processing is a method of forming using the characteristics of metals in the process of transitioning from liquid to solid or from solid to liquid (that is, the coexistence of liquid and solid). This new forming method combines the strengths of solidification processing and plastic processing. That is, the processing temperature is lower than that of the liquid state, the filling is stable, and the thermal impact on the mold is small; the deformation re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D1/00B22D18/02B22D17/00
CPCB22D1/00B22D17/007B22D18/02
Inventor 周冰徐春
Owner SHANGHAI INST OF TECH
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