JP2000135576A - Friction jointing device and friction jointing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a friction jointing device and a friction jointing method capable of jointing a hollow member at low cost and high efficiency. SOLUTION: A jointing force support mechanism 10 slidably contacting with a back face of a joint part 22 is installed, and jointing is performed while the jointing force support mechanism 10 is relatively moved against a jointed member P together with a jointing tool T. The jointing force support mechanism 10 is pressed against the surface side of the joint part 22 by a pressing means 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction welding apparatus and a friction welding method, and more particularly to a friction welding apparatus and a friction welding method using friction heat generated by rotation of a welding tool.

[0002]

2. Description of the Related Art A friction welding method utilizing frictional heat generated by rotation of a welding tool is known as described in, for example, Japanese Patent No. 2712838. In this friction joining method, as shown in FIG. 6, a pin 2 having a smaller diameter is provided at a distal end of a tool main body 1 and a shoulder 3 around a mounting portion of the pin 2 on a distal end surface of the tool main body 1 is provided. Is used. The pin 2 is inserted into the joint of the member P to be joined such as an aluminum alloy while rotating, and the member P and the joining tool T are joined while the shoulder 3 is in contact with the surface of the joint.
And are relatively moved. At this time, as shown in FIGS. 6 and 7, the joining tool T is set in a state in which the tip end side thereof is inclined forward by a predetermined angle α with respect to an axis perpendicular to the surface of the member T to be joined. It is necessary to arrange so that the shoulder 3 comes into contact with the surface of the joint portion on the rear side in the joining progress direction. Then, frictional heat is generated by the rotation of the welding tool T. The frictional heat reduces the deformation resistance of the welding portion and its vicinity, generates plastic flow, and agitates the base material structure of the member to be welded P. Bonding is performed by integrating the matrix structure after cooling.

[0003] Fig. 5 shows the overall schematic structure of a friction welding apparatus for carrying out the above-described friction welding method. In the same figure, T is a welding tool, and P is a welding target. The member to be joined P is placed on the surface plate 4. 10 is a self-propelled portal frame,
The joining tool T is attached to the portal frame 10. Reference numeral 11 denotes a control device, which controls the driving of the welding tool T in three directions of X, Y, and Z in the drawing to perform the welding operation.

In the friction welding method, one of the factors that determines the quality of the welding quality is the positional relationship between the workpiece P and the welding tool T. As shown in FIG. 6, the positional relationship between the tip of the pin 2 of the welding tool T and the workpiece P
And the positional relationship L2 between the shoulder 3 of the welding tool T and the surface of the workpiece P, all of which need to be controlled with an accuracy of 0.1 mm unit. Therefore, conventionally, the member to be joined P is set on the surface plate 4,
The surface of the platen surface is taught to the drive device of the welding tool T, and the welding tool T is moved and controlled so that the welding tool T is always at a constant distance from the surface plate surface.

[0005]

However, in the above-described friction joining method, it is very difficult to join hollow members as shown in FIG. This is because it is necessary to maintain the above-described positional relationship between the joining tool T and the member to be joined P. That is, in the case of the above-mentioned plate-like member P to be joined, the back surface thereof can be supported by the surface plate 4 to support the joining force. However, in the hollow member as shown in FIG. The joint cannot be deformed due to the joining force. Therefore, conventionally, as shown by the imaginary line in FIG. 3, a rib R for supporting the bonding force is specially provided (for example, see Japanese Unexamined Patent Application Publication No.
164), or the thickness of the joint is unnecessarily increased. Therefore, the conventional friction joining apparatus and the conventional friction joining method have a disadvantage that joining the hollow member requires a large cost.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional disadvantages, and an object of the present invention is to provide a friction joining apparatus and a friction joining apparatus capable of joining hollow members at low cost and with high efficiency. And to provide a method.

[0007]

According to a first aspect of the present invention, there is provided a friction welding apparatus, wherein a pin having a smaller diameter is provided at a distal end portion of a tool main body, and a periphery of the pin mounting portion on a distal end surface of the tool main body is shouldered. Equipped with a joining tool configured as
While inserting the pin into the joint of the member to be joined while rotating, the contact member and the joining tool are relatively moved while the shoulder is in contact with the surface of the joint, and the frictional heat generated by the rotation of the tool is used. In the friction welding apparatus for performing the joining by reducing the deformation resistance of the joining portion and the vicinity thereof and generating the plastic flow, a joining force supporting mechanism that slides on the back surface of the joining portion is provided. And a driving means for moving the member together with the joining tool relative to the member to be joined.

According to a third aspect of the present invention, there is provided a welding tool in which a pin having a smaller diameter is provided at the tip of the tool body, and the periphery of the pin mounting portion on the tip face of the tool body is formed as a shoulder. Using, while rotating and inserting the pin into the joint of the member to be joined, and relatively moving the member to be joined and the joining tool while contacting the shoulder with the surface of the joint, friction due to rotation of the tool In a friction welding method of reducing the deformation resistance of the above-mentioned joint and its vicinity by heat and performing joining by generating a plastic flow, a joining force supporting mechanism which slides on the back surface of the above-mentioned joint is provided. The joining is performed while the mechanism is moved relative to the member to be joined together with the joining tool.

[0009] The friction welding apparatus of claim 1 and claim 3.
According to the friction joining method described above, for example, when joining a hollow member as shown in FIG. 3, if a joining force support mechanism is inserted inside the hollow, the joining force is supported by the joining force support mechanism from the back surface of the joining portion. Is done. Moreover, this joining force support mechanism
Since it moves together with the joining tool, continuous joining work can be performed.

According to a second aspect of the present invention, there is provided a friction welding apparatus according to the first aspect, wherein the joining force supporting mechanism is urged toward the surface of the joining portion by an urging means.

According to the second aspect of the present invention, the joining force supporting mechanism can be reliably brought into sliding contact with the back surface of the joining portion by the urging means, and a stable joining operation can be performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of a friction welding apparatus and a friction welding method according to the present invention will be described in detail with reference to the drawings.

In FIG. 1, T is a joining tool as described above, and P is a hollow member (member to be joined) as shown in FIG.
Are respectively shown. The joining force support mechanism 10 is inserted and arranged inside the hollow member P.
The joining force support mechanism 10 is provided at the bottom 21 of the hollow member P.
And a backing portion 12 rotatably supported by the base portion 11. The backing portion 12 is in sliding contact with the upper side of the hollow member P, that is, the back surface of the joining portion 22. . A leaf spring 13 as an urging means is interposed between the base portion 11 and the back contact portion 12. Base 11 and backing 1
2 is urged in the expanding direction by the leaf spring 13, and as a result, the base 12 is
In addition, the back contact portion 12 presses and contacts the back surface of the joint portion 22 of the hollow member P. Reference numeral 14 denotes a pivot portion between the base 11 and the backing portion 12, and a chain (roller chain) 15 is connected to the base 11, as shown in FIGS. The chain 15 serves as a driving means of the bonding force support mechanism 10, and a specific structure will be described below.

FIG. 4 shows a schematic diagram of the entire structure. In the figure, T denotes the joining tool as described above, and P denotes the hollow member, respectively. The position of the joining tool T is controlled by the apparatus main body 30 in the three axes of X, Y, and Z shown in FIG. It has become. In this case, assuming that the joining direction is the X direction, the hollow member P is also arranged so that its longitudinal direction matches the joining direction. The joining force support mechanism 10 is disposed inside the hollow member P at a position directly below the joining tool T. The chain 15 is pulled out in the joining direction, and is wound around a sprocket 31 supported at an appropriate position on the distal end side. Then, the chain 15 is pulled out in a direction opposite to the above direction, and is supported behind the device body 30 in the joining direction. The tip of the sprocket 32 is connected to the apparatus main body 30. As a result, the welding tool T
Is moved in the joining direction (X direction) together with the apparatus main body 30, the joining force support mechanism 10 also moves inside the hollow member P while maintaining the position immediately below the joining tool T.

According to the friction welding apparatus, as shown in FIG. 6, the pin 2 is inserted into the joint of the member P to be joined such as an aluminum alloy while rotating, and the shoulder 3 is inserted into the surface of the joint. By moving the welding tool T while making contact, welding using frictional heat is performed. At this time, at the joint of the hollow member P, the joining force is supported by the joining force support mechanism 10 from the back surface side. Further, since the joining force support mechanism 10 moves together with the joining tool T, such an operation of supporting the joining force from the back surface side is continuously performed during the joining process. As a result, the joining of the hollow member P as shown in FIG. 3 can be performed at low cost and with high efficiency.

Moreover, in the joining force supporting mechanism 10, the back contact portion 12 is urged in the expanding direction by the leaf spring 13, so that the back contact portion 12 is securely pressed against the back surface of the joining portion 22. As a result, a stable joining operation can be performed. Further, since the back contact portion 12 is urged in the expanding direction by the leaf spring 13 as described above, if the downward pressing force from the joining tool T is excessive, the leaf spring 13 is deformed. Since the operation of absorbing the pressing force is performed, the joining force can be kept constant, and the joining quality can be improved.

In the above-described embodiment, the leaf spring 13 is used as the urging means. However, the leaf spring 13 may be omitted, or when the urging means is used, the leaf spring 13 may be used. Other than these may be used. In addition, other than the chain 15 can be used as a driving unit for moving the joining force support mechanism 10. Further, in the above embodiment,
Although only one joining portion of the hollow member P is joined, the joining force support mechanism 10 is disposed inside the hollow member P, and joining of the joining portions on the upper and lower sides in FIG. 3 is performed simultaneously from both sides. Is also good. Although the example in which the hollow members P are joined has been described above, the present invention can be applied to a case where the members to be joined are flat.

[0018]

According to the friction joining apparatus of the first aspect and the friction joining method of the third aspect, the joining force is supported from the back surface of the joining portion by the joining force supporting mechanism. Since it moves together with the joining tool, continuous joining work can be performed, and as a result, joining of hollow members can be performed at low cost and with high efficiency.

Furthermore, according to the third aspect of the present invention,
By the urging means, the joining force support mechanism can be slidably contacted with the back surface of the joining portion, and a stable joining operation can be performed.

[Brief description of the drawings]

FIG. 1 is an enlarged explanatory view showing a structure in the vicinity of a joint in a friction welding apparatus and method according to an embodiment of the present invention.

FIG. 2 is a perspective view of a joining force support mechanism in the friction joining device.

FIG. 3 is an explanatory diagram of an example of a hollow member.

FIG. 4 is an explanatory diagram showing an overall configuration of the friction welding device.

FIG. 5 is an explanatory view showing the overall configuration of a conventional friction welding device.

FIG. 6 is an explanatory diagram for explaining a friction joining method.

FIG. 7 is an explanatory diagram for explaining a friction joining method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tool main body 2 Pin 3 Shoulder 10 Joining force support mechanism 12 Backing part 13 Leaf spring (biasing means) 15 Chain 22 Joining part T Joining tool P Member to be joined

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mitsuhiro Kamioka 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe Kawasaki Heavy Industries, Ltd. Kobe Plant (72) Inventor Kozo Horimoto 2-chome Wadayama-dori, Hyogo-ku, Kobe-shi No. 1-18 Kawasaki Heavy Industries Co., Ltd. Hyogo Factory (72) Inventor Seichiro Yamashita 2-1-1 Wadayama Dori, Hyogo-ku, Kobe City Kawasaki Heavy Industries Co., Ltd. Hyogo Factory (72) Inventor Hiroshi Yokata Hyogo 8 Niijima, Harima-cho, Kako-gun F-term in Kawashige Harima Tec Corporation (reference) 4E067 AA05 BG02 CA01 CA04

Claims (3)

[Claims] 1. A joining tool comprising: a pin having a smaller diameter than the tip of a tool body; and a shoulder around the pin mounting portion on the tip surface of the tool body as a shoulder. The pin is rotated while being inserted into the joint, and the member to be joined and the joining tool are relatively moved while the shoulder is in contact with the surface of the joining portion. In a friction welding apparatus that performs joining by reducing plastic deformation flow and generating plastic flow, a joining force supporting mechanism that slides on the back surface of the joining portion is provided, and the joining force supporting mechanism is provided together with the joining tool. A friction welding device comprising a driving means for relatively moving the member to be welded. 2. The friction joining apparatus according to claim 1, wherein said joining force supporting mechanism is urged toward the surface of said joining portion by urging means. 3. A joining tool for joining members to be joined by using a joining tool in which a pin having a smaller diameter is provided at the tip of the tool body and the periphery of the pin mounting portion on the tip face of the tool body is formed as a shoulder. The pin is rotated while being inserted into the joint, and the member to be joined and the joining tool are relatively moved while the shoulder is in contact with the surface of the joining portion. A frictional joining method for joining by reducing plastic deformation resistance and generating plastic flow is provided with a joining force supporting mechanism that slides on the back surface of the joining portion, and the joining force supporting mechanism is provided together with the joining tool. A friction joining method, wherein joining is performed while being relatively moved with respect to a member to be joined.