JP2001314955A - Method of internal chill for aluminum series base material and manufacturing method for aluminum series component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of an internal chill for an aluminum series base material capable of implementing simple and inexpensively. SOLUTION: The method of the internal chill is characterized by that internal chill is performed by using molten metal made from aluminum or aluminum alloy, after the surface of the aluminum series base material made of a fiber reinforced metal material, in which aluminum, aluminum alloy, or their material is reinforced by a fiber, is subjected to rough surface treatment by a shot blast in which metal particles having a superior wattability with aluminum or aluminum alloy is used as a shot material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for casting an aluminum-based substrate made of aluminum or an aluminum alloy, or a fiber-reinforced metal material obtained by reinforcing the material with fibers, and a method for manufacturing an aluminum-based component.

[0002]

2. Description of the Related Art As a conventional method for casting an aluminum base material, Japanese Patent Application Laid-Open No. 4-75759 discloses a method of forming a gold (Au) film having excellent wettability with aluminum or an aluminum alloy on the surface of the aluminum base material. ), Silver (Ag),
There has been proposed a method in which a vapor-deposited film of copper (Cu) or the like is formed, and then a base material on which a vapor-deposited film is formed is cast by a high-pressure casting method using a molten metal made of aluminum or an aluminum alloy.

[0003] Japanese Patent Application Laid-Open No. 7-40034 discloses that a mold portion for setting an aluminum-based composite material to be cast is provided separately from the main mold and has lower heat conductivity than the main mold. With an insert mold, a heater is installed in the insert mold, the temperature of the insert mold is kept higher than the temperature of the main mold, and in this state, the aluminum-based composite material preheated outside the mold is used. There has been proposed a method in which an aluminum-based composite material is cast in a mold by pouring a molten aluminum alloy into the mold.

[0004]

However, in the as-casting method described in Japanese Patent Application Laid-Open No. 4-75759, in order to increase the wettability of the surface of an aluminum-based substrate with aluminum or an aluminum alloy, Gold (A
u), a deposited film of an expensive metal such as silver (Ag), copper (Cu) or the like is formed, so that the cost is increased and an apparatus for forming the deposited film is required. There is a concern that costs will increase.

[0005] On the other hand, in the as-casting method described in Japanese Patent Application Laid-Open No. 7-40034, it is necessary to keep the insert mold at a high temperature with a heater when casting the aluminum-based composite material, Since the base composite material needs to be preheated outside the mold, mold fabrication becomes complicated and
There is a concern that a preheating device for the aluminum-based composite material is required and the running cost increases.

Accordingly, a first object of the present invention, which has been made in view of the above points, is to provide a method for easily casting an aluminum base material at low cost.

A second object of the present invention is to provide a method of manufacturing an aluminum-based component simply and inexpensively by employing such a method of casting.

[0008]

According to a first aspect of the present invention, there is provided a method for casting an aluminum-based substrate, wherein the first object is achieved by aluminum or an aluminum alloy, or a fiber-reinforced material obtained by reinforcing the material with fibers. The method is characterized in that after the surface of an aluminum-based substrate made of a metal material is roughened, it is cast using a molten metal made of aluminum or an aluminum alloy.

According to the first aspect of the present invention, since the surface of the aluminum-based substrate is roughened and cast, it can be easily and inexpensively implemented, and fine projections are formed on the surface by the roughening. Because it is formed and the surface area increases,
It becomes possible to improve the adhesiveness of the cast-in.

According to a second aspect of the present invention, in the method for assembling an aluminum-based substrate according to the first aspect, the rough surface treatment is performed by using metal particles having excellent wettability with aluminum or an aluminum alloy. It is performed by shot blast.

According to the second aspect of the present invention, fine projections are formed on the surface of the aluminum base material to increase the surface area, and at the same time, a shot material layer having excellent wettability with aluminum or an aluminum alloy is formed on the surface. So
It becomes possible to further improve the adhesiveness of the cast-in.

According to a third aspect of the present invention, there is provided a method of manufacturing an aluminum-based component, comprising the steps of: forming a plate-shaped aluminum member made of aluminum, an aluminum alloy, or a fiber-reinforced metal material obtained by reinforcing the material with fibers; Processing the base material into a predetermined shape by pressing, hydraulic forming, etc. to form a semi-finished product, a step of shot blasting the surface of a desired portion of the semi-finished product, and forming the semi-finished product into a mold Setting, and casting the desired portion subjected to the shot blasting process using a molten metal made of aluminum or an aluminum alloy.

According to the third aspect of the present invention, a plate-like aluminum base material is processed into a predetermined shape to form a semi-finished product, and the surface of a desired portion of the semi-finished product is shot blasted, and then the semi-finished product is processed. It is possible to manufacture a desired aluminum-based part at a low cost by a simple process of setting a desired part in a mold and casting a desired part, and by subjecting the surface of the desired part to shot blasting, Since fine projections are formed on the surface to increase the surface area, it becomes possible to enhance the adhesiveness of the cast-in.

According to a fourth aspect of the present invention, in the method for manufacturing an aluminum-based component according to the third aspect, metal particles having excellent wettability with aluminum or an aluminum alloy are used as the shot material in the shot blasting. Features.

According to the fourth aspect of the present invention, the shot blasting process increases the surface area of a desired portion of the semi-finished product, and simultaneously forms a shot material layer having excellent wettability with aluminum or an aluminum alloy on the surface. ,
It becomes possible to further improve the adhesiveness of the cast-in.

The invention according to claim 5 is the invention according to claim 3 or 4.
In the method for manufacturing an aluminum-based component described in (1), at least a part of a desired portion of the semi-finished product is made to penetrate into the molten metal and is cast.

According to the fifth aspect of the present invention, at least a part of a desired portion of the semi-finished product is made to penetrate into the molten metal and is cast-in, so that the contact area with the cast-in is increased, and the adhesion of the cast-in is increased. Can be further increased.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to an example of a method of manufacturing an engine rocker cover.
This will be described with reference to FIGS.

(First Embodiment) FIGS. 1 and 2 are views for explaining a first embodiment. FIG. 1 is a plan view of a rocker cover, and FIG. 2 is a cross-sectional perspective view taken along line AA of FIG. FIG. The rocker cover 1 includes a plate-shaped cover member 2 made of aluminum, and cast-in portions 3a and 3b made of an aluminum alloy integrally formed at a portion where the thickness of the cover member 2 is required. I have. Here, the cast-in portion 3a is provided in a seal portion that seals in contact with the mounting surface of the engine, and the cast-in portion 3b is provided in a fastening portion in which a mounting hole 4 for fixing the engine with bolts or the like is formed. I have.

In manufacturing the rocker cover 1, first, an aluminum plate material having a predetermined thickness (for example, 2 mm) is processed into a predetermined shape by pressing, hydroforming (hydraulic forming), or the like, and is a semi-finished cover member. 2
To form In the present embodiment, the rocker cover 1
Is manufactured, the cover member 2 is provided with a rib 2 for noise suppression.
a is also formed at the same time.

Thereafter, the surfaces of the seal portion and the fastening portion forming the cast-in portions 3a and 3b are roughened on the cover member 2. This rough surface treatment is performed, for example, using a shot material having high hardness and excellent wettability with an aluminum alloy, for example, a particle size of 50 to 100 μm made of a material such as alumina and titanium.
This is performed by shot blasting using m shot materials.

When the shot blast processing is performed as described above,
Fine projections are formed on the surfaces of the seal portions and the fastening portions forming the cast-in portions 3a and 3b, so that the surface area increases and a shot material layer is formed.

Thereafter, the cover member 2 which has been subjected to the shot blasting process is mounted on a not-shown ordinary die casting caster (die).
, And cast-in is performed using a molten metal of an aluminum alloy, thereby forming the cast-in portions 3a and 3b integrally with the shot-blasted seal portion and the fastening portion to obtain the rocker cover 1.

According to the present embodiment, a cover member 2 which is a semi-finished product is formed by processing an aluminum plate material into a predetermined shape, and the surfaces of the seal portion and the fastening portion of the cover member 2 with respect to the engine are shot blasted. Then, the rocker cover 1 can be manufactured by setting the cover member 2 on a normal die casting machine and casting the seal portion and the fastening portion using a molten metal made of an aluminum alloy, so that equipment costs and running costs can be improved. The rocker cover 1 can be manufactured simply and inexpensively without any increase in cost.

Further, since the surfaces of the sealing portion and the fastening portion of the cover member 2 are roughened by shot blasting using a shot material having excellent wettability with an aluminum alloy,
Adhesion with the cast-in portions 3a, 3b can be improved. Furthermore, since the cast-in portions 3a and 3b are formed at the portions where the wall thickness is required, the thickness of the cover member 2 can be made smaller than the thickness (2.5 mm or more) of the conventional rocker cover manufactured by die casting. The overall weight can be reduced, and the heat dissipation can be improved. In the present embodiment,
Since the ribs 2a for noise suppression are formed at the same time when the cover member 2 is formed, the quietness after the rocker cover 1 is attached to the engine can be improved.

(Second Embodiment) FIG. 3 is a sectional view of an essential part for explaining a second embodiment. The rocker cover 11 has a projection 15 formed around a mounting hole 14 of a fastening portion of the cover member 12 having a rib 12a.
5 and the seal portion are made to penetrate into the molten metal and are cast to form the cast-in portions 13a and 13b, and other configurations and manufacturing methods are the same as those of the first embodiment.

If the stuffed portions 13a and 13b are formed in this manner, in addition to the effect of the first embodiment, the contact area between the cover member 12 and the stuffed portions 13a and 13b becomes larger, and Adhesion can be further enhanced.

The present invention is not limited to the above embodiment, but can be variously modified without departing from the gist of the present invention. For example, the present invention is not limited to the rocker cover of the engine, but is required to reduce the weight of the housing of a personal computer and the like, and is applied to the manufacture of a part that requires a mounting boss.
Lightening and heat dissipation can be improved.

[0029]

According to the method for assembling an aluminum-based substrate according to the present invention, the surface of the aluminum-based substrate is roughened to be cast, so that the method can be carried out easily and inexpensively. By forming fine projections on the surface, the surface area can be increased, so that the adhesion of the cast-in can be enhanced, and the rough surface treatment is made of metal particles excellent in wettability with aluminum or aluminum alloy as shot material By performing the shot blasting, a shot material layer can be formed on the surface of the aluminum-based base material, so that the adhesiveness of the cast-in can be further improved.

Further, according to the method for manufacturing an aluminum-based component according to the present invention, a plate-shaped aluminum-based substrate is processed into a predetermined shape to form a semi-finished product, and the surface of a desired portion of the semi-finished product is shot blasted. After the treatment, the semi-finished product is set in a mold and the desired part is cast, so that the desired aluminum-based part can be manufactured in a simple process at low cost, and the semi-finished product can be manufactured by shot blasting. Since the surface area can be increased by forming fine projections on the surface of the casting, the adhesion of the cast-in can be enhanced.

Further, by performing the shot blasting process using metal particles having excellent wettability with aluminum or aluminum alloy as the shot material, a shot material layer having excellent wettability can be formed on the surface of the semi-finished product. It is possible to further improve the adhesiveness of the cast-in, furthermore, by injecting at least a part of the desired part of the semi-finished product into the molten metal and casting, the contact area with the cast-in can be increased, The adhesiveness of the whole can be further increased.

[Brief description of the drawings]

FIG. 1 is a plan view of a rocker cover for explaining a first embodiment of the present invention.

FIG. 2 is a sectional perspective view taken along line AA of FIG.

FIG. 3 is a cross-sectional view of a main part of a rocker cover for describing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rocker cover 2 Cover member 2a Rib 3a, 3b Cast-in part 4 Mounting hole 11 Rocker cover 12 Cover member 12a Rib 13a, 13b Cast-in part 14 Mounting hole 15 Projection

Claims (5)

[Claims] 1. After roughening the surface of an aluminum-based substrate made of aluminum or an aluminum alloy or a fiber-reinforced metal material obtained by reinforcing the material with fibers, the material is cast using a molten metal made of aluminum or an aluminum alloy. A method for casting an aluminum base material, characterized in that: 2. The casting of an aluminum-based substrate according to claim 1, wherein the roughening treatment is performed by shot blasting using metal particles having excellent wettability with aluminum or an aluminum alloy as a shot material. How to take. 3. A semi-finished product is formed by processing a plate-shaped aluminum base material made of aluminum or an aluminum alloy or a fiber-reinforced metal material obtained by reinforcing the material with fibers into a predetermined shape by pressing, hydraulic forming, or the like. Performing a step of shot blasting the surface of a desired portion of the semi-finished product; setting the semi-finished product in a mold, and melting the shot-blasted desired portion of aluminum or aluminum alloy melt. A method for producing an aluminum-based component, comprising: 4. The method for producing an aluminum-based part according to claim 3, wherein the shot material in the shot blasting process uses metal particles having excellent wettability with aluminum or an aluminum alloy. 5. The method according to claim 3, wherein at least a part of a desired portion of the semi-finished product is penetrated into the molten metal and cast.