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Mold core and preparation method thereof and method for producing casting inner cavity by using mold core

A technology of casting inner cavity and core, which is applied in the direction of core, casting molding equipment, casting mold, etc., to avoid deformation due to external force, good bending effect, and easy removal.

Inactive Publication Date: 2011-05-18
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems existing in the aluminum alloy castings in the prior art when sand cores are used to form complex fine-pore inner cavities, the present invention provides a core and its preparation method and a method for preparing the inner cavity of a casting by using the core

Method used

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  • Mold core and preparation method thereof and method for producing casting inner cavity by using mold core
  • Mold core and preparation method thereof and method for producing casting inner cavity by using mold core

Examples

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Embodiment 1

[0047] Example 1: This method is used to cast aluminum alloy shell castings of aviation fuel gear pumps. The casting material is ZL101, the pouring temperature is 710°C, the inner cavity is required to bear pressure, the minimum size of the inner cavity oil circuit is Ф4.2mm, and the diameter of one of the holes is Ф4.2mm fine-hole oil circuit, the overall shape is L-shaped, and the total length is 170mm; this example needs to use a brass tube with an outer diameter of Ф4.2mm, which is manufactured according to the preparation method of the brass tube core described in the content of the present invention. Example of the brass tube core required. Put the manufactured core into the cavity and combine it with the mold after being preheated by the core setting procedure, pour aluminum liquid into it to form a casting, and then remove the brass tube core according to the cleaning procedure in the above-mentioned casting inner cavity forming method , The brass tube core is removed ...

Embodiment 2

[0048] Example 2: Taking the casting of an aluminum alloy casting for a one-piece pump motor for a high-horsepower heavy vehicle as an example, the casting material is ZL105A, the pouring temperature is 720°C, the inner cavity is required to bear pressure, and one of the oil passages in the inner cavity has a diameter of Ф5mm and a length of 275mm. The O-shaped annular fine-hole oil passage intersects with an L-shaped oil passage with a diameter of Ф6.2mm and a length of 75mm. It is difficult to form it by using the sand core in the prior art. This embodiment requires two brass tubes of Ф5mm and Ф6.2mm, and the brass tube interlaced core required in this example is manufactured according to the preparation method of the brass tube core described in the content of the present invention. Put the prepared core into the mold cavity after preheating to combine with the mold, pour aluminum liquid to form a casting, and then remove the brass tube core with nitric acid according to the...

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Abstract

The invention provides a mold, a preparation method thereof and a method for producing a casting inner cavity by using the mold core. The mold core is made of hollow material; and an alloy is arranged in the hollow structure of the mold core. The mold core made of brass replaces the traditional sand core, has higher structural strength and is suitable for complex fine hole inner cavities of an aluminum alloy casing to form. In the method for producing the mold core, the characteristic of low melting point aluminum alloy is used and the mold core is filled into a hollow brass tube to relieve the stress generated by bending the brass tube with favorable bending effect; in addition, the hollow brass section is prevented from being deformed due to external action in the bending process.

Description

technical field [0001] The invention belongs to the field of casting, and relates to a core and its preparation method and a method for preparing the inner cavity of a casting by using the core, and is especially suitable for use in the casting of aluminum alloy castings with complex fine-pore inner cavities, and can also be used for difficult It is used in the casting of aluminum alloy castings whose inner cavity is formed by sand cores. Background technique [0002] Cast aluminum alloy has excellent comprehensive properties and is widely used in aviation, aerospace, automobile and other industries. Aluminum alloy castings can be cast and formed by sand casting, metal casting, pressure casting, low pressure casting and other methods. For aluminum alloy castings with an inner cavity structure, the casting inner cavity is generally formed by various sand cores, and the sand cores are mainly made of various resin sands, oil sands, etc. [0003] In aviation, aerospace, automo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/10B22D25/02
Inventor 杨保华李春荣王万成王晓唐桢
Owner XIAN AERO ENGINE CONTROLS
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