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A semi-solid die-casting method for impeller of turbocharger

A technology of turbocharger and impeller, which is applied in the field of turbocharger impeller manufacturing and semi-solid die-casting, can solve the problems of inability to meet the requirements of harsh conditions, restrictions on wide application, and high preparation cost, and improves the utilization of materials. efficiency, reduce process flow, and reduce the effect of preparation cost

Active Publication Date: 2018-11-20
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Casting impellers have casting defects and low performance, which cannot meet the requirements of harsh conditions
Forging machined pressure impeller has excellent performance, but the cost of preparation is high, and its wide application is limited

Method used

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  • A semi-solid die-casting method for impeller of turbocharger
  • A semi-solid die-casting method for impeller of turbocharger
  • A semi-solid die-casting method for impeller of turbocharger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The pressure impeller product with an outer diameter of 20 mm is prepared by the present invention, and the number of blades of the product is 8, and the blades have the same size and are evenly distributed along the outer diameter. A356 alloy (liquidus 615°C, solidus 555°C) was used to prepare semi-solid billets. When the temperature of the alloy melt reaches 660°C, the melt is transferred to a specific cylindrical container, and the melt is naturally cooled in the container while stirring the container. When the temperature of the melt drops to the semi-solid temperature range of 570-580°C, The semi-solid billet is pressed into the cup of the die casting machine. In the mold design, the diameter of the sprue is 20mm, the diameter of the cake is 30mm, and the thickness of the cake is 50mm. The injection rod presses the semi-solid blank in the material cup into the mold cavity through the sprue cavity, directly fills the mold, and prepares the impeller sample.

Embodiment 2

[0026] The pressure impeller product with an outer diameter of 500 mm is prepared by the present invention, and the number of product blades is 30, and the interval between large and small blades is evenly distributed along the outer diameter. A356 alloy (liquidus 615°C, solidus 555°C) was used to prepare semi-solid slurry. When the temperature of the alloy melt reaches 680°C, the melt is transferred to a specific cylindrical container, and the melt is naturally cooled in the container while stirring the container. When the melt temperature drops to the semi-solid temperature range of 590-600°C, Pour the semi-solid slurry into the die casting machine cup. In the mold design, the diameter of the sprue is 100mm, the diameter of the cake is 120mm, and the thickness of the cake is 50mm. The injection rod presses the semi-solid blank in the material cup into the mold cavity through the sprue cavity, directly fills the mold, and prepares the impeller sample.

Embodiment 3

[0028] The pressure impeller product with an outer diameter of 150 mm is prepared by the present invention, and the number of product blades is 16, and the intervals between large and small blades are evenly distributed along the outer diameter. A356 alloy (liquidus 615°C, solidus 555°C) was used to prepare semi-solid slurry. When the temperature of the alloy melt reaches 680°C, the melt is transferred to a specific cylindrical container, and the melt is naturally cooled in the container while stirring the container. When the melt temperature drops to the semi-solid temperature range of 590-600°C, Pour the semi-solid slurry into the die casting machine cup. In the mold design, the diameter of the sprue is 75mm, the diameter of the cake is 100mm, and the thickness of the cake is 100mm. The injection rod presses the semi-solid blank in the material cup into the mold cavity through the sprue cavity, directly fills the mold, and prepares the impeller sample.

[0029] The tensile...

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Abstract

The invention relates to a semi-solid die casting method of a compressor wheel of a turbosuperchager and belongs to the technical field of manufacturing and semi-solid die-casting of compressor wheels of turbosuperchargers. The method comprises the steps that a semi-solid blank or slurry is pressed into or poured into a material cup of a die-casting machine; and the semi-solid blank or slurry is pressed into a mold cavity through a plunger rod by means of a sprue cavity, mold filling is conducted directly, and the compressor wheel product is obtained. The compressor wheel product prepared through the method has the advantages that the procedure is short, the amount of tailing is small, the cost is low, and the performance is excellent and has wide market application prospects.

Description

technical field [0001] The invention relates to a semi-solid die-casting forming method for a turbocharger impeller, and belongs to the technical field of turbocharger impeller manufacturing and semi-solid die-casting. Background technique [0002] Turbochargers are widely used in automobiles, ships, engineering machinery, electric power, military industry, aerospace and other fields. The pressure impeller is the core component of the turbocharger, and its shape is complex, such as figure 1 As shown, the working conditions are harsh and the performance requirements are high, so the preparation is difficult. There are two traditional preparation techniques for pressure impellers: casting and forging machining. Casting impellers have casting defects and low performance, which cannot meet the requirements of harsh conditions. Forging machined press impellers have excellent performance, but the cost of preparation is high and their wide application is limited. Semi-solid die...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D17/00B22D17/22
Inventor 朱强李大全和优锋张帆许小静
Owner GRIMAT ENG INST CO LTD
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