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Low-pressure mold-filling high-pressure solidification casting device and casting method

A low-pressure, high-pressure technology, applied in the field of casting, can solve problems such as equipment structure difficulties, and achieve the effects of performance improvement, shape and structure optimization

Inactive Publication Date: 2018-07-27
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, excessive crystallization pressure will bring many difficulties to the equipment structure (Deng Hongyun et al., Practical Handbook of Special Casting Production, 1st Edition, April 2015, P396)

Method used

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  • Low-pressure mold-filling high-pressure solidification casting device and casting method
  • Low-pressure mold-filling high-pressure solidification casting device and casting method

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Experimental program
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Effect test

Embodiment 1

[0100] The low-pressure filling and high-pressure solidification casting device of the present invention is installed on the BH-1 type low-pressure pressurized casting machine, and the A356 aluminum alloy steering knuckle casting is carried out with low-pressure pressurized casting. The process is as follows:

[0101] (1) Prepare aluminum alloy according to a certain ratio, the specific mass percentage is: Si: 7.2%, Mg: 0.3%, Fe: 0.10%, Mn: 0.03%, Ti: 0.12%, Sr: 0.012%; Cu: 0.01 %, RE: 0.002%, Nb: 0.02%, Cr: 0.005%, Zr: 0.02%, B: 0.005%, Nd: 0.005%, Ni: 0.001%, 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 After refining and slag removal, pour the molten aluminum alloy into the low-pressure casting holding furnace. At this time, the density of the molten aluminum is 2.54g / m 3 ;

[...

Embodiment 2

[0110] The low-pressure filling mold high-pressure solidification casting device of the present invention is installed on the APC1500A type differential pressure boost casting machine, and the aluminum alloy automobile motor casing casting is subjected to differential pressure boost casting, and the process is as follows:

[0111] The method for performing differential pressure casting of aluminum alloy castings using the low-pressure filling and high-pressure solidification casting device includes the following steps:

[0112] (1) Prepare aluminum alloy according to a certain ratio, the specific mass percentage is: Si: 7.0%, Mg: 0.45%, Fe: 0.12%, Mn: 0.1%, Ti: 0.15%, Sr: 0.015%; Cu: 0.10 %, RE: 0.010%, Nb: 0.05%, Cr: 0.008%, Zr: 0.01%, B: 0.005%, Nd: 0.005%, Ni: 0.005%, Zn: 0.009%, 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 refi...

Embodiment 3

[0121] Install the low-pressure mold-filling and high-pressure solidification casting device of the present invention on a pressure-regulating casting machine, and perform pressure-regulating casting on aluminum alloy automotive motor fan castings. The process is as follows:

[0122] (1) Prepare aluminum alloy according to a certain ratio, the specific mass percentage is: Si: 7.5%, Mg: 0.60%, Fe: 0.20%, Mn: 0.1%, Ti: 0.15%, Sr: 0.05%; Cu: 0.01 %, RE: 0.10%, Nb: 0.01%, Cr: 0.001%, Zr: 0.01%, B: 0.01%, Nd: 0.002%, Ni: 0.005%, Zn: 0.008%, 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 730°C After refining and slag removal, inject the molten aluminum alloy into the holding furnace of the casting machine. At this time, the density of the molten aluminum is 2.55g / m 3 ;

[0123] (2) Prepare the casting mach...

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Abstract

The invention discloses a low-pressure mold-filling high-pressure solidification casting device and a casting method, which can be used in an anti-gravity casting machine or an extrusion casting machine. The device comprises a casting mold, a metal melt lifting channel and a shunting cone, wherein a mold cavity is formed in the casting mold, the shunting cone can move up and down, and the shuntingcone has the effects of shunting and guiding metal melt at a liquid lifting stage and pressing a filter screen, so that a mold is stably filled with the metal melt in a mode of laminar flow. After the mold is filled, the shunting cone moves downwards to press a sprue bushing so as to form a sealing structure, and a metal melt inlet of the sprue bushing and the mold cavity is sealed. Then high pressure charging is performed on the metal melt, so that the metal melt is solidified at high pressure, the pressure range can reach 0.1 MPa to 160 MPa, and the defects of shrinkage cavities, shrinkageporosity, inclusions, slag inclusions and the like are avoided. Additionally, optimum structural design is performed on the shunting cone, so that low-pressure controllable stable mold filling and high-pressure solidification forming of the metal melt are guaranteed. While the metal melt in the mold cavity is applied by a pressure mechanism, the metal melt in the metal melt lifting channel cannotform a solidification shell, so that the service life of equipment is prolonged.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a casting device and a casting method capable of realizing low-pressure controllable mold filling and high-pressure solidification molding. Background technique [0002] Lightweight is one of the most important ways for fuel vehicles to save energy and reduce emissions, and for new energy vehicles to reduce consumption and increase range. Replacing traditional steel materials with lightweight materials such as aluminum alloys has become an inevitable choice for vehicle design renewal. Aluminum alloys used in automobiles can be divided into cast aluminum alloys and deformed aluminum alloys. Cast aluminum alloys dominate, accounting for about 80% of the aluminum used in automobiles. They are mainly used to manufacture parts such as engines, clutch housings, wheels, and chassis parts. part. With the development of casting technology, more parts are formed by anti-gravity casting m...

Claims

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Application Information

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IPC IPC(8): B22D18/04B22D18/08B22D27/11C22C21/02
CPCB22D18/04B22D18/08B22D27/11C22C21/02
Inventor 张花蕊张虎
Owner BEIHANG UNIV
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