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Casting device and casting method of low pressure filling type and high pressure solidification used for differential pressure pressurizing casting machine

A technology of differential pressure casting machine and casting machine, which is applied in the field of high-pressure solidification molding casting device and low-pressure controllable mold filling, which can solve the problems of unsatisfactory density, strength and toughness of castings, and increase of shrinkage and solidification pressure not enough

Inactive Publication Date: 2018-06-01
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the pressure is generally 0.3-1.0 MPa for differential pressure casting of metal molds, and 0.3-0.4 MPa for differential pressure casting of eutectic alloys (Deng Hongyun et al., Practical Handbook of Special Casting Production, April 2015, No. 1 edition, P396), but the degree of increase in feeding and solidification pressure is still not enough, resulting in the densification, strength and toughness of the casting are still not satisfactory

Method used

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  • Casting device and casting method of low pressure filling type and high pressure solidification used for differential pressure pressurizing casting machine
  • Casting device and casting method of low pressure filling type and high pressure solidification used for differential pressure pressurizing casting machine
  • Casting device and casting method of low pressure filling type and high pressure solidification used for differential pressure pressurizing casting machine

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Effect test

Embodiment 1

[0109] The low-pressure filling high-pressure solidification casting device of the present invention is installed on the APC1500B differential pressure boost casting machine, and the differential pressure boost casting is carried out to the high-speed rail engine motor casing casting, including the following steps:

[0110] (1) Prepare aluminum alloy according to a certain ratio, the specific mass percentage is: Si: 6.8%, Mg: 0.35%, Fe: 0.20%, Mn: 0.06%, Ti: 0.15%, Sr: 0.02%; Cu: 0.01 %, RE: 0.002%, Nb: 0.015%, Cr: 0.005%, Zr: 0.01%, B: 0.005%, Nd: 0.002%, Ni: 0.001%, Zn: 0.001%, and the balance is Al. After the alloy is melted in the melting furnace, Al-5Ti-B refiner and Al-10Sr modifier are added at a temperature of 760°C for refinement and modification, and a self-sinking pollution-free refining agent is added at a temperature of ~740°C for removal. Gas refining for 20 minutes, slag removal after standing for 10 minutes, taking chemical composition samples, after the compos...

Embodiment 2

[0119] The low-pressure filling mold high-pressure solidification casting device of the present invention is installed on the CY-2000B type differential pressure boost casting machine, and the differential pressure boost casting is carried out to the automobile auxiliary frame casting, comprising the following steps:

[0120] (1) Prepare aluminum alloy according to a certain ratio, the specific mass percentage is: Si: 6.5, Mg: 0.45%, Fe: 0.05%, Mn: 0.1%, Ti: 0.15%, Sr: 0.02%; Cu: 0.08% , RE: 0.02%, Nb: 0.01%, Cr: 0.20%, Zr: 0.01%, B: 0.01%, Nd: 0.005%, Ni: 0.005%, Zn: 0.005%, and the balance is Al. After the alloy is melted in the melting furnace, add Al-5Ti-B refiner and Al-10Sr modifier at 750°C for refinement and modification, and add self-sinking pollution-free refining agent for degassing at 740°C Refining for 30 minutes, standing still for 20 minutes, removing slag, taking chemical composition samples, and transferring the melted aluminum alloy liquid from the pneumatic ...

Embodiment 3

[0129] The low-pressure filling and high-pressure solidification casting device of the present invention is installed on the APC1500A type differential pressure boost casting machine, and the differential pressure boost casting is carried out to the barrel-shaped motor casing casting, including the following steps:

[0130] (1) Prepare aluminum alloy according to a certain ratio, the specific mass percentage is: Si: 6.7%, Mg: 0.35%, Fe: 0.05%, Mn: 0.05%, Ti: 0.12%, Sr: 0.01%; Cu: 0.01 %, RE: 0.2%, Nb: 0.01%, Cr: 0.001%, Zr: 0.01%, B: 0.005%, Nd: 0.005%, Ni: 0.005%, Zn: 0.005%, and the balance is Al. After the alloy is melted in the melting furnace, add Al-5Ti-B refiner and Al-10Sr modifier at 750°C for refinement and modification, and add self-sinking pollution-free refining agent for degassing at 740°C Refining for 30 minutes, standing still for 30 minutes, removing slag, taking chemical composition samples, and transferring the melted aluminum alloy liquid from the pneumatic...

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Abstract

The invention discloses a casting device and casting method of low pressure controllable filling type and high pressure solidification molding capable of being used for differential pressure and differential pressure pressurizing casting machine. The device comprises a casting mold, a metal melt body liquid lifting channel and a shunt cone capable of moving up and down. The shunt cone plays functions of shunt guiding to a metal melt body and compacting on a filter net in the process of liquid lifting, so that the metal melt body is smoothly filled in a laminar flow mode. After filling type isfinished, the shunt cone moves downwards to form a sealing structure, and a metal melt body inlet of a pouring gate sleeve and a mold cavity is closed; then, a metal liquid is pressurized to solidifythe metal liquid under the high pressure, and the defects such as shrinkage porosity, and debris and slag inclusion are avoided; and meanwhile, the shape of the shunt cone is optimized and designed, and low pressure controllable stable filling type and high pressure solidification molding of the metal melt body are ensured. The casting device can be used for casting of casting pieces of shell type, frame type and bucket body type, compared with traditional differential pressure casting, the strength can be improved by 10-30%, and the elongation rate can be improved by 30-65%.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a casting device and casting method that can be used for low-pressure controllable mold filling and high-pressure solidification molding of a differential pressure casting machine and a differential pressure booster casting machine. Background technique [0002] Lightweight is one of the most important ways to save fuel, reduce emissions, reduce consumption and increase range. Replacing traditional steel materials with lightweight materials such as aluminum alloys and magnesium alloys has become a design update for key components in the fields of aerospace, high-speed rail, and automobiles. inevitable choice. The overall precision casting of large thin-walled complex key components has become the development trend of lightweight material structural parts manufacturing technology. The advantages of high production efficiency and wide application range have attracted more and mor...

Claims

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Application Information

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IPC IPC(8): B22D18/04
CPCB22D18/04
Inventor 张花蕊张虎
Owner BEIHANG UNIV
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