JP3205782B2 - Manufacturing method of aluminum suspension parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing aluminum suspension parts such as arms, links and the like used for automobile suspensions.

[0002] In this specification, the term "aluminum" shall include aluminum alloys in addition to pure aluminum.

[0003]

2. Description of the Related Art Suspension parts for automobiles include:
Conventionally, press-formed steel products have been used.
However, recently, in order to improve the performance of the automobile and reduce the fuel consumption, it is required to reduce the weight, and it has been considered to use aluminum products for various automobile suspension parts.

[0004] By the way, a suspension component for an automobile usually does not have an axis extending in the same direction in each part. For example, in the case of the lower arm, mounting holes are formed at both ends of the lower arm so as to be swingably mounted on the vehicle body side and the wheel side via rubber bushes. However, since the directions of the swing centers are different, the mounting holes are formed. Direction is also different. Moreover, the lower arm
A plurality of through holes for reducing the weight for reducing the weight are also formed.

[0005] Therefore, conventionally, such a lower arm, by heating the extruded rod and trimmed after being subjected to hot forging processing, Ru is prepared by further heat treatment.

[0006]

However, in the conventional method of manufacturing an aluminum suspension component, a large number of man-hours are required for hot forging a round bar into a predetermined shape. Moreover, since it is necessary to perform trimming on the whole, the amount of burrs to be removed increases,
Material yield is poor. Therefore, there is a problem that the cost increases.

An object of the present invention is to provide a method of manufacturing an aluminum suspension component which solves the above-mentioned problems.

[0008]

Means for Solving the Problems The method of manufacturing aluminum suspension component according to the first invention, the final product form
Extruded profile with cross-sectional shape approximating the shape
And then subjected to solution treatment, and then the aluminum
The extruded profile is cut to length, or the final product
Extruded profile with a cross-sectional shape approximating the shape
And then extrude the aluminum extrusion into the specified length
And then subjected to solution treatment, and then a part of the cut piece
Torsion or bending to the final product shape.
And aging treatment.

The method for manufacturing an aluminum suspension part according to the second invention is characterized in that the first and second parts having different directions are provided at both ends.
Aluminum suspension having second and second mounting holes
A method for manufacturing a pension component, the method comprising:
With a cross-sectional shape similar to that of
First and second two through holes extending in the extrusion direction at both ends.
After forming an aluminum extruded profile with through holes,
Extruded aluminum material is cut to length and then cut
Between the first through hole and the second through hole in the piece and the second through hole
Locally heat the vicinity of the hole, and add
Torsion while applying compression load in the direction
It is characterized in that it is formed into a shape and further subjected to a solution treatment and an aging treatment.

The method for manufacturing an aluminum suspension component according to the third invention is characterized in that the first and second parts having different directions are provided at both ends.
Aluminum suspension having second and second mounting holes
A method for manufacturing a pension component, the method comprising:
With a cross-sectional shape similar to that of
First and second two through holes extending in the extrusion direction at both ends.
After forming an aluminum extruded profile with through holes,
Extruded aluminum material is cut to length and then cut
Between the first through hole and the second through hole in the piece and the second through hole
Locally heat the vicinity of the hole, and add the thickness of the cut piece
Bending to form the final product shape.
It is characterized by performing embodiment processing and aging processing.

[0011]

According to the first aspect, only a part of the cut piece is
Perform buckling or bending to form the final product shape
Therefore, the number of man-hours is reduced as compared with the conventional case where the whole is formed by forging. Also, solution treatment
After twisting or bending, and then aging
Due to the treatment, twisting or bending which is likely to be the starting point of destruction
The tensile strength of the barbed part is improved. In addition, no flash
It doesn't need to be trimmed at all
Material yield is improved .

According to the second and third aspects of the invention, as in the first aspect, the number of steps is reduced and burrs are generated as compared with the conventional case where the whole is formed by forging. not doing this
So there is no need for trimming and material yield is reduced
To improve .

Further , in the second invention, the first piece in the cut piece is
A station is located between the first through hole and the second through hole and in the vicinity of the second through hole.
Partially heated and compressively applied to this part in the length direction of the cut piece
To twist while applying
The tensile strength of the machined part is improved and the torsion limit
Is improved, and then it is formed into the final product shape,
Treatment and aging treatment.
Strength and torsional limits are further improved .

Further , in the third invention, the first piece in the cut piece is provided.
A local portion between the through hole and the second through hole and in the vicinity of the second through hole;
Heat and bend this section in the thickness direction of the cut piece.
Since it is intended to apply, taken two having different directions at both ends
Aluminum suspension parts with attachment holes can be easily manufactured and can be further formed into final product shapes.
And then subjected to solution treatment and aging treatment.
Therefore, the tensile strength of the bent portion is improved .

[0015]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the method of the present invention is applied to manufacture of an aluminum lower arm of an automobile suspension.

FIG. 1 shows the first and second embodiments of the present invention and is a perspective view of a stage in the process of manufacturing the lower arm.
FIG. 2 is a perspective view of the lower arm manufactured in this embodiment.

In FIG. 2, an aluminum lower arm is used.
(10) is a horizontally long plate, and has first and second mounting holes (11) and (12) formed at both ends thereof at right angles to each other. The first mounting hole (1) is located between the mounting holes (11) and (12).
A plurality of weight reducing holes (13) (14) are formed in the same direction as (1).

In manufacturing such a lower arm (10), first, an extruded profile (1) having a cross-sectional shape as shown in FIG. 1 is formed. The extruded member (1) is preferably formed of, for example, JIS A6N01 alloy or A6061 alloy. The extruded profile (1) has the same cross-sectional shape as the lower arm (10) except for the second mounting hole (12), and has first and second penetrations at both ends in the cross-section. Hole
(2) While having (5), two through holes (2) and (5)
That having a middle through hole.

Next, the extruded aluminum material (1) is cut into a predetermined length to form a cut piece (1A). This cut piece (1A)
In this case, the first through hole (2) becomes the first mounting hole (11), and the intermediate through holes (3) and (4) become the weight reducing holes (13) and (14).
The second through-hole (5) and adjacent thereto in the further cut piece (1A)
Locally heating the portion between the adjacent intermediate through-holes (4),
This part is twisted while applying a compressive load in the length direction of the cut piece (1A) so that the direction of the second through hole (5) is perpendicular to the other holes (2) (3) (4). The final product shape is obtained by forming the second mounting hole (12).

By the way, as one embodiment of the first invention,
After forming the extruded profile (1), it is subjected to a solution treatment,
After forming the finished product, aging treatment is performed. Other of the same invention
As an example, a cut piece (1A) after cutting the extruded shape (1) is used.
After solution treatment to make the final product shape, aging treatment
Is applied. As an embodiment of the second invention, the final product shape and
After that, a solution treatment and an aging treatment are finally performed . Less than
As described above, the lower arm (10) is manufactured.

FIG. 3 shows a lower arm manufactured according to the first and third embodiments of the present invention . In FIG. 3, the second mounting hole (21) of the lower arm (20) is provided with the first mounting hole (11).
And an acute angle. Other configurations are the same as those of the lower arm shown in FIG. 2, and the same parts are denoted by the same reference numerals.

In manufacturing the lower arm (20), first, in the same manner as in the case of the lower arm (10), the cut piece (1A)
After forming, the second through hole (5) in the cut piece (1A) and
A portion between the adjacent through hole (4) and the intermediate through hole (4) is locally heated, and this portion is bent in the thickness direction of the cut piece (1A) to form a second through hole (5). Orient the other hole (2)
(3) Make an acute angle with (4) to form a second mounting hole (21).

By the way, as one embodiment of the first invention,
After forming the extruded profile (1), it is subjected to a solution treatment,
After forming the finished product, aging treatment is performed. Other of the same invention
As an example, a cut piece (1A) after cutting the extruded shape (1) is used.
After solution treatment to make the final product shape, aging treatment
Is applied. As an embodiment of the third invention, the final product shape and
After that, a solution treatment and an aging treatment are finally performed . Less than
As described above , the lower arm (20) is manufactured.

In the above embodiment, the method of the present invention is applied to the manufacture of a lower arm. However, the method of the present invention can be applied to the manufacture of other automotive suspension parts.

[0025]

According to the method of manufacturing an aluminum product of the present invention, aluminum automobile suspension parts can be manufactured as described above, so that the number of steps is reduced as compared with the conventional method. Further, since the material yield can be improved must be completely no longer subjected to trimming, the cost is cheaper. And, the torsion
Or, the tensile strength of the bent portion is improved .

According to the second aspect of the present invention, further, the tension
The torsional strength and the torsional limit are improved . Further, the third invention
According to the above, further, two mountings having different directions at both ends.
Easy to use aluminum suspension parts with perforations
Can be manufactured and the tensile strength of the bent part
Also improve .

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a perspective view of a stage in the process of manufacturing a lower arm.

FIG. 2 is manufactured according to the first and second embodiments of the invention;
FIG. 4 is a perspective view of the lower arm.

FIG. 3 is a perspective view of a lower arm manufactured according to another embodiment of the first and third inventions.

[Explanation of symbols]

1 : Extruded aluminum material 1A : Cut piece 2 : First through hole 5 : Second through hole 10 , 20: Lower arm 11 : First mounting hole 12 , 21: Second mounting hole

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shunta Shiota 6,224 Kaiyamacho, Sakai City Showa Aluminum Co., Ltd. (72) Inventor Yuichi Takami 6,224 Kaiyamacho Sakai City, Showa Aluminum Corporation ( 72) Inventor Masao Yokoyama 6,224, Kaiyama-cho, Sakai City Inside Showa Aluminum Co., Ltd. (72) Inventor Yasuo Shiozawa 6,224, Kaiyama-cho Sakai City, Showa Aluminum Co., Ltd. (56) References JP 62 -1666044 (JP, A) JP-A-2-169312 (JP, A) JP-A-5-220535 (JP, A) JP-A-5-162522 (JP, A) (58) Fields investigated (Int. . ^7, DB name) B60G 7/00 C22F 1/04 B21D 53/86

Claims (3)

(57) [Claims] (1) having a cross-sectional shape similar to the shape of a final product;
Solution treatment after forming extruded aluminum extrusion (1)
And then extrude the aluminum extrusion (1)
Cut into pieces or a cross section that approximates the final product shape
Form the extruded aluminum shape (1)
This aluminum extruded profile (1) was cut to the specified length
Post solution treatment, then screw a part of the cut piece (1A)
To form a final product shape
A method for manufacturing an aluminum suspension component, further comprising aging treatment. 2. A first and a second member having different directions at both ends.
Aluminum suspension with two mounting holes (11) and (12)
A method of manufacturing a pension component, having a cross-sectional shape similar to the final product shape,
First and second extending in the extrusion direction to both ends in the cross section
Extruded aluminum profile with two through holes (2) and (5)
After forming (1), this aluminum extruded section (1) is
Cut to fixed length, then the first through hole in the cut piece (1A)
Between (2) and the second through hole (5) and in the vicinity of the second through hole (5)
Is locally heated, and this section is cut in the length direction of the cut piece (1A).
Twist processing while applying compression load to final product shape
A method of manufacturing an aluminum suspension part , comprising forming a solution into a solution and subjecting it to a solution treatment and an aging treatment. 3. A first and a second direction having different directions at both ends.
Aluminum suspension with two mounting holes (11) and (21)
A method of manufacturing a pension component, having a cross-sectional shape similar to the final product shape,
First and second extending in the extrusion direction to both ends in the cross section
Extruded aluminum profile with two through holes (2) and (5)
After forming (1), this aluminum extruded section (1) is
Cut to fixed length, then the first through hole in the cut piece (1A)
Between (2) and the second through hole (5) and in the vicinity of the second through hole (5)
Is heated locally, and the thickness of the cut piece (1A) is
Bending to form the final product shape and further solution
A method for producing an aluminum suspension component, comprising subjecting the aluminum suspension component to a treatment and an aging treatment.