JP2003211326A - Metallic component manufacturing method and metallic component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a plurality of components by cutting an assembling member made by frictional agitation joining elements. <P>SOLUTION: First material 100, second material 200, and third material 300 structuring a metallic component are prepared. The first material 100 has a cylindrical portion 110 and an edge portion 120, and a through hole 130 is formed on the cylindrical portion 110. The second material 200 has the same structure. The third material 300 has a platy shape, and is joined along joining line S<SB>1</SB>, S<SB>2</SB>by carrying out frictional agitation joining F<SB>1</SB>by frictional agitation joining tool 400. A surface side of the joined members is cut to be a specified shape, and then cut off by a specified width dimensions. Nest, hole machining or burr removing is conducted to obtain a required metallic component. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to friction stir welding (F
The present invention relates to a method for manufacturing a metal part using the SW) technology.

[0002]

Friction stir welding is used for joining aluminum alloy materials and the like, and has been put to practical use for joining vehicle panel materials and the like. This is, for example, Japanese Patent Laid-Open No. 09-3091.
No. 64 (EP0797043A).

[0003]

SUMMARY OF THE INVENTION The present invention provides a method suitable for mass-producing metal parts such as machine parts using friction stir welding.

Friction stir welding, in particular, leaves a hole in the tool for friction stir welding at the end point of the welding. It is not desirable to have this hole in the product. Therefore, the ends of the members must be removed after friction stir welding. Also,
It is desirable that the end portion on the starting point side of the friction stir welding is also removed after the friction stir welding. For this reason, many members are cut and removed.

Therefore, it is difficult to apply friction stir welding to a part having a small width in the direction of friction stir welding.

An example of this metal part will be described with reference to FIG. The metal component 1 is, for example, a mechanical component used as a link arm, and has a structure in which two end portions 10 and 20 are connected by a plate-shaped arm 30. A cylindrical hole 12 is formed in the first end portion 10, and a link pin or the like is inserted therein. A cylindrical hole 22 is formed in the second end 20 and a link pin or the like is inserted therein.

In the production of the mechanical component 1, for example, a metal material is made by casting or forging, and mechanical processing is performed to finish it into a required shape. Alternatively, it is cut out from the material of the metal block and processed into the required shape.

Regardless of the processing method, it is inferior in productivity to machine parts one by one.

The present invention provides a method suitable for mass-producing metal parts such as machine parts using friction stir welding. In particular, it is suitable when a metal part having a relatively short width is manufactured by friction stir welding.

[0010]

The above-mentioned object is to prepare a plurality of materials for a metal part, and perform friction stir welding on adjacent materials to join them to manufacture an assembled member, and perform the friction stir welding. This can be achieved by cutting the assembly member into a plurality of metal parts at right angles to the joining line.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An example of the manufacturing method of the present invention will be described with reference to FIGS. The mechanical parts of this embodiment are linked
It is an arm. In this embodiment, three kinds of materials 100, 200, 300 are prepared as shown in FIG.

The first material 100 is a member that constitutes one end of a mechanical component, and has a cylindrical portion 110 and a flat plate-shaped edge portion 120 protruding in the radial direction of the cylindrical portion 110. A through hole 130 is provided at the center of the cylindrical portion 110.

The protruding size of the edge portion 120 is set to a size suitable for friction stir welding. That is, the cylindrical portion 110 is dimensioned so as not to contact the rotary tool for friction stir welding. The shape of the tip of the edge portion 120 is usually a right angled end surface, but an end surface shape suitable for friction stir welding can be adopted. Edge 1
The thickness of 20 is substantially the same as the thickness of the third material 100.

The first material 100 is a hollow shaped material obtained by extruding an aluminum alloy. The first material may be configured by other means. For example, it is formed by cutting a rolled material.
The material of the first material 100 is not limited to the aluminum alloy and may be any material as long as the material can be applied by friction stir welding.

The second material 200 is also formed in the same shape by the same method as the first material 100. The second material 200 has a cylindrical portion 210, a flat plate-shaped edge portion 220 protruding from the cylindrical portion 210 in the radial direction, and a through hole 230. The second material 200 is a member that constitutes the other end of the mechanical component.

If the first material 100 and the second material 200 have the same shape, the same material can be prepared and used in a posture in which they face each other.

The third material 300 is a long flat plate,
It is made of a material substantially similar to the first material 100 and the second material 200. The third material 300 is, for example, a rolled aluminum alloy plate material.

The end surface 302 of the material 300 is formed in a shape suitable for friction stir welding with the end surface 122 of the edge portion 120 of the material 100 and the end surface 222 of the edge portion 220 of the material 200. Since the material 300 is a long rolled plate, it is desirable that the material 300 be an end face orthogonal to the plane of the flat plate.

A procedure for manufacturing a link arm from the materials 100, 200 and 300 will be described. First, as shown in FIG. 3, the materials 100, 200, 300 are placed on a stand (not shown) and fixed. Edge 12 of material 100
0 and the end of the material 300 are butted against each other, and the material 20
The zero edge 220 and the end of the blank 300 are butted.

Next, as shown in FIG. 4, the material 100, the material 300, and the material 200 are along the joining line S ₁ of the abutting portion.
And the material 300 are intermittently temporarily welded by welding W ₁ . In FIG. 4, the end of the joining line, particularly the end on the starting point side of friction stir welding is not welded, but it is desirable to weld this end. This temporary tack welded state, or the material 10 on the mount
The state in which 0, 200, and 300 are fixed is referred to as a temporarily assembled state.

Next, as shown in FIG.
Therefore, the two joining lines S₁, S_TwoFriction stir welding along
F₁I do. By this joining, the materials 100, 200,
300 is formed as an integral member. Figure 6 shows two joining lines
S₁, S_TwoFriction stir welding F ₁In the state of being joined by
is there. By this joining, the materials 100, 200, 300
It is formed as an integral member. Friction stir welding F₁, F₁End of
Hole F at the point_Three, F_ThreeIs vacant.

FIG. 7 is a sectional view showing the structure of the joint portion by friction stir welding. Edge 12 of material 100,200
0, 220, when the plate thickness of the material 300 is relatively thin, or when there is no problem in strength, as shown in FIG. 7, friction stir welding F ₁ is performed from only one side of the material.

FIG. 8 shows a joining cross section in the case where the material to be joined has a relatively large plate thickness, and the friction stir welding F ₁ , F ₂ is performed twice from both sides of the material to complete the joining. .
For example, after performing the friction stir welding F ₁ from one surface side, the material is inverted and fixed to the pedestal, the temporary welding is performed as described above, and then the friction stir welding F ₂ is performed.

Next, the surface of the friction stir welded surface is cut. This results in burrs and recesses in the friction stir weld. This cutting is mainly to remove the burrs and recesses. In addition, in consideration of the formation of the concave portion, the edge portions 120, 22
0, the thickness of the third material is thick, so the edge 12
0, 220, the plate thickness of the material 300 is cut to a predetermined thickness. The cutting for making the thickness predetermined may be one side or both sides, but both sides are desirable. Further, it is not always necessary to cut the outer shapes of the materials 100 and 200 excluding the edge portions 120 and 220. As described above, since the cutting process is performed before dividing into a plurality of parts, the process can be performed easily in a short time, and the cost can be reduced.

FIG. 1 is a perspective view of the assembly member 500 manufactured by the above process. This assembly member 500
Are set to the cutting lines C ₁ , C _2, ... And cutting is performed by an appropriate means. As a result, the desired component (link arm) 1 shown in FIG. 2 can be obtained.

A cutting line C ₁ is set so that the starting point side of the friction stir welding is not a regular part. In other words, it excludes the part which is not the proper friction stir welding. Further, the cutting line C on the end point side of the friction stir welding is provided on the start point side of the hole F ₃ . If the hole F ₃ is filled with welding, this is not necessary.

Next, finishing processing is performed on the cut component 1. The finishing process may be a drilling process for making the distance between the centers of the through holes 130, 230 predetermined, a drilling process for making the diameters of the through holes 130, 230 predetermined, or the through holes 130, 230. Is a process for forming a predetermined shape, or a process for burring or chamfering the surface of the cutting line. As a result, the desired component (link arm) 1 shown in FIG. 9 can be obtained.

According to this, since the friction stir welding is used,
Little deformation. Therefore, even if the material 300 has a long length, it can be accurately joined, and each component 1 can be manufactured to a predetermined size. Therefore, parts having the same shape can be efficiently processed.

Further, since the link arm 1 is manufactured by joining the materials manufactured by dividing the parts having different thicknesses into three parts, the material cost and the cutting cost for forming the predetermined shape are reduced. Can be produced by

Further, when the length of the arm (300) between the two cylindrical portions 110 and 210 is long, it is difficult to manufacture the whole as an extruded shape member. According to the above-mentioned embodiment, the extruded product can be made small, and the extruded product can be applied.

Further, since the arm (300) is made of rolled material, it is lightweight and has high strength.

Although the materials 100 and 200 in the above-mentioned embodiments are extruded shape members, they can be applied to the case of rolled material plates. The link arm is a strength member. In the case of a strong member, a material that is difficult to extrude is generally required. For this reason,
Materials manufactured by extrusion are not used. Therefore, the rolled material 100, 200 is used. It does not have holes 130 and 230. The edges 120 and 220 are provided by cutting so that they can be easily joined to the material 300 that becomes the arm. Further, the concentric materials 100, 200 are inserted in the through holes 130, 230.
Cut the outer shape of. Three materials 100, 200, 3
After joining 00, the edges 120 and 220 and the material 300 are cut to a predetermined thickness. Then, it is cut into a plurality of pieces. Next, holes are formed for the through holes 130 and 230. After cutting, the outer shape can be cut in a predetermined manner.

[0033]

According to the present invention, a metal part is assembled by assembling a plurality of metal materials, friction stir welding is applied to a joint portion, an assembled member is manufactured, and the metal member is cut into pieces having a predetermined width dimension. Therefore, it can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a mechanical component according to an embodiment of the present invention during manufacturing.

FIG. 2 is a perspective view of a metal component manufactured by cutting.

FIG. 3 is a perspective view of three materials according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a state where three materials are temporarily assembled.

FIG. 5 is a perspective view of performing friction stir welding on the temporarily assembled material.

FIG. 6 is a perspective view showing a state in which friction stir welding is completed.

FIG. 7 is a cross-sectional view showing a joint portion of friction stir welding.

FIG. 8 is a cross-sectional view showing a joint portion of friction stir welding.

FIG. 9 is a perspective view of a metal component manufactured by the manufacturing method of the present invention.

[Explanation of symbols]

1 Metal Parts 10, 20 End 30 Arm 100 First Material 110 Cylindrical Part 120 Edge 130 Through Hole 200 Second Material 210 Cylindrical Part 220 Edge 230 Through Hole 300 Third Material C ₁ , C ₂ Cutting Line F _{1, F 2} friction stir welding _{F 3} friction stir the end point of the joining hole _S 1, _{S 2} junction line

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[Procedure amendment]

[Submission date] March 20, 2003 (2003.3.2
0)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (11)

[Claims] 1. A plurality of materials for metal parts are prepared, and adjacent materials are friction stir welded to be joined together to manufacture an assembled member, and the assembly member is manufactured in a direction perpendicular to the joining line joined by friction stir welding. Cutting the assembly member into a plurality of metal parts. 2. The method for manufacturing a metal component according to claim 1, wherein after the assembly member is manufactured, the assembly member on the surface on which the friction stir welding is performed is cut, and then the cutting is performed. A method for manufacturing a metal component, comprising: 3. The method for manufacturing a metal part according to claim 1, wherein after the assembly member is manufactured, the assembly member is cut into a predetermined outer shape, and then the cutting is performed. Manufacturing method of metal parts. 4. The method for manufacturing a metal part according to claim 1, wherein after the cutting, a hole is formed in the metal part along a joining line of the friction stir welding. Manufacturing method of metal parts. 5. The method of manufacturing a metal component according to claim 1, wherein the plurality of materials includes a first material that is a thick portion and a second material that is a thin portion of the metal component. Wherein the first material has a protrusion protruding toward the joint with the second material, the thickness of the protrusion is substantially the same as the thickness of the second material, and A method of manufacturing a metal component, comprising: performing a friction stir welding on a portion where a protruding portion and the second material are butted. 6. The method for manufacturing a metal part according to claim 5, wherein the first material is an extruded shape material, and the second material is a plate of a rolled material. Production method. 7. The method of manufacturing a metal component according to claim 5, wherein the first material is a rolled material cut, and the second material is a rolled material plate. Manufacturing method of metal parts. 8. The method for manufacturing a metal part according to claim 1, wherein the material is manufactured by a plurality of manufacturing methods. 9. The method of manufacturing a metal component according to claim 1, wherein the method of manufacturing the material of the portion having the holes is a hollow extrusion processing method. 10. The method for manufacturing a metal component according to claim 1, wherein the method for manufacturing the material of the portion having a smaller thickness than other portions includes
A method of manufacturing a metal part, which is a rolling method. 11. A first member having a hole, and a second member joined to the hole, wherein the first member has a protrusion protruding toward the second member, The protruding portion and the abutting portion of the second member are joined by friction stir welding, the first member is an extruded shape member, and the second member is a plate of a rolled material. And metal parts.