Cast-in structure of vehicle component, and cast-in mold

Abstract

An object of the present invention is to surely provide a projection of burr by forming an appropriate gap needed to set a cast-in member to a cast-in mold, and by completely closing the gap when the cast-in mold is clamped, and to correct a cast-in positioning (axis mating) to a die-cast component by a clamping operation of the die-cast mold, regardless of a dimensional precision of the cast-in member upon a manufacture.A steel plate cast-in member 2, which is wrapped cast except for a bonding portion 2b to a steel plate bonding member 3 upon molding a die-cast component 1, has a mold contact portion A at a boundary between a cast-in portion 2a wrapped cast with a die-cast component 1 and the bonding portion 2b. When a cast-in mold A is clamped, the mold contact portion 4 is brought into intimate butting contact with the cast-in mold A, whereby a gap S between the cast-in member 2 and the cast-in mold A, i.e., a cavity is closed. Thus, a projection of burr is prevented.

Description

TECHNICAL FIELD[0001]The present invention relates to a cast-in structure for a cast-in member and a cast-in mold, and more particularly to a cast-in structure for a steel plate cast-in member and a cast-in mold, the cast-in member being wrapped cast except for a bonding portion bonded to a bonding member upon molding a die-cast component, when the die-cast component casted by using a light alloy metal such as aluminum and a steel plate bonding member are bonded to each other, i.e., when different kind of metals are bonded to each other.BACKGROUND ART[0002]When a member made of a light alloy metal such as aluminum, magnesium, or zinc and a member made of an iron steel (iron metal), i.e., members made of different kind of metals, are directly welded and bonded to each other, a weak intermetallic compound is formed between both members (on a bonding interface). Therefore, a weld crack is generated, resulting in that reliability in bonding strength (weld strength) is deteriorated. This...

AI Technical Summary

Benefits of technology

The present invention relates to a cast-in member structure and a cast-in mold that can prevent the formation of burr and weld strength. The cast-in member is formed into a cylinder and has a taper shape that ensures a good contact with the cast-in mold. The cast-in mold is clamped to bring into intimate butting contact with the mold contact portion of the cast-in member, which prevents burr from coming out of the casting boundary. This allows for a reliable and strong bond between the cast-in member and the die-cast component. The cast-in mold is designed to prevent burr formation and ensures high-quality casts.

Problems solved by technology

Therefore, a weld crack is generated, resulting in that reliability in bonding strength (weld strength) is deteriorated.

On the other hand, a dimensional error due to plastic deformation (plastic strain) is likely to occur on the cast-in member manufactured by machine working such as press working.

A cast-in member that is formed into a cylinder having a rectangular (oblong) or elliptic cross-section by bending process is particularly likely to have a dimensional error due to plastic deformation.

In addition, it is difficult to perform a process for maintaining high dimensional precision.

When the burr (casting burr) projects up to the bonding portion of the cast-in member bonded to the steel plate bonding member by welding, the projecting burr might cause deterioration in bonding strength to the bonding member.

When it is supposed that the aluminum die-cast component, to which the steel plate cast-in member made of different kind of metal from the aluminum die-cast component is wrapped cast and bonded, is used for a body component or a suspension component of a vehicle that is used under severe environment where the component is easy to be corroded, galvanic corrosion generated between the cast-in member and the aluminum die-cast component, which are made of different kind of metals, becomes a problem.

However, these methods cannot prevent the galvanic corrosion due to the projecting burr, resulting in that the effect of these methods is deteriorated.

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