JP3001703B2 - Manufacturing method of aluminum engine mount bracket - 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 for manufacturing an engine mounting bracket for a vehicle, and more particularly to a method for manufacturing an aluminum engine mounting bracket in which a cantilever mounting plate portion is provided on a collar portion for filling a cushion material.

[0002]

2. Description of the Related Art Japanese Patent Laying-Open No. 62-3920 discloses an aluminum engine mounting bracket manufactured by extrusion molding. This bracket is formed by increasing the thickness of the bottom portion of a collar portion into which a cushion material is inserted. The through hole in the extrusion direction is extruded and formed in the thickened portion, and after forming, the bottom surface of the thickened portion,
That is, a configuration is shown in which a screw hole communicating with the through hole is bored from the bottom surface of the collar portion, and the bracket is attached to the screw hole with bolts.

[0003]

Problems to be Solved by the Invention In recent years, aluminum extruded products of engine mounting brackets have been studied in order to reduce the weight and cost of vehicles and improve sound vibration performance. High load and strong impact are parts that are continuously loaded and its strength is considered important.However, in the structure of the aluminum engine mount bracket as in the previous example, the strength is secured, but the collar part There is a problem in that it is difficult to freely design following the vehicle design because it is limited to the above-described structure and form in which the mounting portion is formed by increasing the wall pressure.

[0004] Conventionally, a structure is used in which bolts are tightened in through holes of the thickened portion, and there is a problem in assemblability. Separate processes such as bolting are required, which in turn increases costs and reduces the merits of aluminum and extrusion products.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and provides an engine mounting bracket having a high degree of design freedom which can cope with various engine mounting structures while satisfying the strength and weight reduction required for the engine mounting bracket. It is intended to provide aluminum extrusion products as a base.

[0006]

Means for Solving the Problems As a means for solving the problem, the present invention is directed to a main body processing in which the mounting plate portion is extended to the side of the solid body by extrusion while forming the color composition portion as a solid body. The above-mentioned aluminum engine mount bracket is formed by a method of punching the same hole for filling the cushioning material by punching the solid body collar part, and forging the mounting plate part to increase the strength by forging and forging pressure. It is configured so that

[0007]

The above-mentioned aluminum engine mount bracket has a structure in which a cantilever mounting plate portion is continuously connected to a defining wall of a collar portion by an integral aluminum base material over a surface length, and a highly reliable joint. No structure. This is a use of the features of aluminum extrusion. In addition, by adopting the method of punching the cylinder hole for filling the cushioning material into a solid body, the color composition part can easily form a high-precision cylinder hole with high roundness and smoothness equivalent to cutting processing, Cutting work that leads to higher labor costs can be eliminated.

Further, the mounting plate can be formed into a predetermined shape by extruding the mounting plate portion integrally with the collar composition portion, and then forging the mounting plate portion. At the same time, the mounting plate portion can be formed by forging pressure. Significant increase in strength is achieved.

As described above, it is possible to provide an engine mounting bracket which is sound and has a high degree of freedom in design by extending the mounting plate portion by extruding an aluminum product.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS.

As shown in FIGS. 2 to 9, the engine mounting bracket is provided with a cantilever mounting plate 2 on a collar 1 and a cylindrical hole 3 in which a cushion material 4 is inserted. The mother form of the engine mount bracket having the elements 1, 2, and 3 is formed by extrusion of aluminum or an aluminum alloy (hereinafter, simply referred to as aluminum). As shown in FIGS. 1 and 5, this extruded product does not have a cylinder hole for filling the cushion material, and is extruded with a long color composition portion 1 'as a solid body. A long cantilevered mounting plate portion 2 continuously provided on the left and right sides along the axis (on the generatrix) is formed by extrusion.

The long extruded product is cut into a fixed length on a plane C perpendicular to the axis as shown by a broken line in FIGS. 1 and 6 to form a solid composition as shown in FIG. A basic structure of an engine mounting bracket having a portion 1 'and a cantilevered mounting plate portion 2 provided along the axis on the outer peripheral surface of the color composition portion 1' is formed.

Next, as shown in FIGS. 3 and 7, the solid body forming the extruded color composition portion 1 'is subjected to a punching process in an extrusion axial direction or a direction perpendicular to the coaxial line, so that the inside of the cushion material is formed. The collar portion 1 having the filling cylinder hole 3 is formed.

To restate, as shown in FIGS. 1 and 6, the cantilever mounting plate 1 is extrusion-molded so as to project right and left two sides in a symmetrical arrangement with respect to the collar composition portion 1 '. As shown in FIG. 3, the cylindrical hole 3 is formed in the cut surface C (front and rear side surfaces).
Punching.

Alternatively, as shown in FIG. 7, the left and right sides of the solid body forming the color composition portion 1 'are punched to form the cylindrical hole 3. In the embodiment shown in FIGS. 1 to 5, the mounting plate portion 2 is extended to the side orthogonal to the opening surface side of the cylindrical hole 3 of the collar portion 1, and in the embodiment shown in FIGS. The collar portion 1 has a structure projecting toward the opening side of the cylindrical hole 3.
Is formed integrally with the defining wall of the collar portion 1 over the surface length of the left and right side surfaces or the front and rear side surfaces.

Next, as shown in FIGS. 3 and 4, a cold forging process is applied to the center of the mounting plate 2 from the front side indicated by the arrow P1 in the figure, and the mounting plate 2 is opened at the end. A groove 4 is formed, and two mounting seat pieces 5 are formed in the mounting plate portion 2, the ends of which are bifurcated by the groove 4 and the bases are connected.

Next, as shown in FIG. 5, each of the mounting seats 5 is expanded by applying a cold forging process shown by an arrow P2 in the drawing to the groove 4 between the mounting seats 5, and the installation position is changed. Expanding. Alternatively, as shown in FIGS. 7 and 8, a cold forging process shown by an arrow P <b> 3 in the drawing is applied to the center of the mounting plate portion 2 to upset the same portion, and two mounting seats are attached to the mounting plate portion 2. 5 and the connecting wall 6 remains between the two mounting seat pieces 5.

In the embodiment shown in FIGS. 1 to 5 and the embodiments shown in FIGS. 6 to 9, the forging force is applied to the mounting plate portion 2 to increase its strength, and at the same time, the mounting plate 5 is formed in a required manner. Give shape.

In the case of the embodiment shown in FIGS. 6 to 9, the collar composition portion 1 'is formed by the forging process P3 so as to conform to the shape of the cylindrical hole 3, and the defining wall of the cylindrical hole 3 is fixed. To correct.

Next, a mounting hole 7 is formed in the mounting seat 5 formed by applying the cold forging process, and each mounting seat 5, that is, the mounting plate 2, is mounted on the vehicle frame with the collar portion 1 in the middle. And tighten the bolts and nuts through the mounting holes 7 of the mounting seat pieces 5 to form a four-point support state.

[0021]

As described above, the cantilever mounting plate portion is extended over the surface of the collar portion on the collar portion for filling the cushion material, and the strength is increased while the mounting seat piece is formed by forging. And provide a sound engine mounting bracket.

Further, the method of hitting the cylindrical hole with the color composition portion as a solid body can give the cylindrical hole the same roundness and smoothness as the cutting process, leading to an increase in labor and processing time. Cutting work can be saved.

According to the present invention, an engine mounting bracket of a type in which the mounting plate portion projects from the collar portion as described above can be soundly formed by extruded aluminum.
Further, the cost can be reduced, and the sound and vibration performance of the bracket of the same type can be improved.

Further, it is possible to increase the degree of freedom in designing an engine mount bracket made of an extruded aluminum product, and to promote its practical use.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a long extruded product of an engine mount bracket according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a base shape of the bracket formed by cutting the extruded product shown in FIG. 1 into fixed lengths.

FIG. 3 is a perspective view showing a state where a cylinder hole is punched into the engine mounting bracket shown in FIG. 2;

FIG. 4 is a perspective view showing a state in which the bracket shown in FIG. 3 is forged to form a mounting seat piece.

5 is a cross-sectional view in plan view of a process of expanding the mounting seat piece of the bracket shown in FIG. 4;

FIG. 6 is a perspective view showing a long extruded product of an engine mount bracket according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a state in which a cylindrical hole is punched into a bracket formed by cutting the extruded product shown in FIG. 6 into a fixed length.

FIG. 8 is a perspective view showing a state in which the bracket shown in FIG. 7 is forged to form a mounting seat.

FIG. 9 is a sectional view taken along line AA in FIG.

[Explanation of symbols]

 1 'Color composition part 1 Collar part 2 Mounting plate part 3 Cylindrical hole 5 Mounting seat piece P1, P2, P3 Forging C Cutting surface

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigehiko Nakazato 19-1 Gomijima, Fuji City, Shizuoka Prefecture Inside Yamakawa Kogyo Co., Ltd. (56) References JP-A-5-180256 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) B21K 1/26 B21J 5/06 B21D 53/84 B21D 53/86 B21C 23/14 F16F 1/38

Claims (2)

(57) [Claims] The present invention is characterized in that the color composition portion is extruded into a solid body, and at the same time, a cantilever mounting plate portion which is provided along the axis of the color composition portion and projects laterally is extruded from the color composition portion, The solid body forming the color composition portion is punched in the axial direction to form a cylinder hole for filling the cushion material,
A method for manufacturing a bracket for an aluminum engine mount, wherein forging is performed on the cantilever mounting plate to form a mounting seat having a required shape. 2. A method for manufacturing an aluminum engine mount bracket according to claim 1, wherein said cantilever mounting plate portion is extruded so as to protrude to two sides of said collar composition portion.