JPH1128582A - Friction stir welding equipment - Google Patents

Abstract

(57) [Problem] To provide a friction stir welding apparatus capable of reliably preventing deformation of a welding member. SOLUTION: A rotating probe 12 is inserted into an abutting portion 3 or an overlapping portion of two joining members 1 and 2, and a contact portion with the probe is softened by frictional heat and stirred while the probe is inserted. The joining of the joining members 1 and 2 is performed by moving the probe 12 along the butting portion or the overlapping portion, or by moving the joining members 1 and 2 so that the probe 12 sequentially passes through the butting portion 3 or the overlapping portion. This is a friction stir welding apparatus that performs welding or lap welding. The friction stir welding apparatus is provided with a straightening roller 50 that presses the joint 4 joined by the probe 12 to remove distortion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction stir welding apparatus used for butt joining or lap joining of joining members made of a metal material such as an aluminum material.
The present invention relates to a friction stir welding apparatus which is preferably used to produce a large-sized joint product such as a floor material, a wall material, a ceiling material, and a scaffold material by performing butt joining or lap joining of a plurality of plate-like joining members. .

[0002] In this specification, the term "aluminum" is used to include its alloy.

[0003]

2. Description of the Related Art The following method has been proposed as a friction stir welding method, which is one of the solid-state welding methods. That is, FIG.
As shown in the figure, a large-diameter cylindrical rotor (111) and a small-diameter rotor that is provided to protrude on the end axis (Q) of the rotor (111) and that is harder than the joining members (101) and (102). Using a joining tool (110) having a pin-shaped probe (112), the two metal plate-shaped joining members (101) (10) abutted against each other while rotating the rotor (111) at high speed.
The probe (112) is inserted into or near the butt portion (103) of 2). The insertion is performed until the tip of the probe (112) reaches the vicinity of the surface of the joining members (101) and (102) on the side opposite to the probe insertion side. In this figure, at this time, the shoulder (111a) consisting of a flat surface on the probe side of the rotor (111) is connected to the two joining members (101) (10).
It is in contact with 2). Then, the probe (1) is moved along the butting portion (103) with the probe inserted.
12) is moved. The probe (112) is generated by frictional heat generated by the rotation of the probe (112), or by frictional heat generated by sliding between the shoulder (111a) of the rotor (111) and the joining members (101) and (102). Members (101) and (102) near the contact portion with
Is softened and agitated by the probe (112), and the probe (112) is moved so that the softened and agitated portion receives the advance pressure of the probe (112) and fills the passage groove of the probe. After flowing plastically in such a manner as to wrap backward in the direction of travel, the heat of friction is rapidly lost and the solidified material is cooled and solidified. This phenomenon is the probe (112)
Is repeated sequentially with the movement of the joint, and finally the two joining members (101) and (102) are joined and integrated at the butting portion (103). (104) is the two joining members (10) joined by the probe (112).
1) The junction of (102).

[0004] Although not shown, the butting portion (10
3) Insert the probe (112) into the two joining members (101) (1) so that the probe (112) sequentially passes through the butting portion (103) while the probe is inserted.
02), the two joining members (101) are moved.
Butt joining of (102) can also be performed.

[0005] Such a friction stir welding method is used not only for butt welding as shown in FIG.

According to such friction stir welding, since it is a solid phase welding, there is no restriction on the type of metal material used as the joining members (101) and (102), or it is compared with fusion welding such as MIG or TIG. In addition, there is an advantage that deformation due to thermal distortion at the time of joining is small.

[0007]

However, even in the above-mentioned friction stir welding, the joint (10) is caused by frictional heat generated by contact with the rotating probe (12).
There was a case where slight distortion was caused in 4), and the joining members (1) and (2) were slightly deformed and twisted or warped.
In particular, when the joining members (101) and (102) were thin and long, deformation was likely to occur.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a friction stir welding apparatus capable of reliably preventing deformation of a joining member regardless of the thickness and length of the joining member. The purpose is to provide.

[0009]

According to the present invention, a rotating probe is inserted into a butt portion or an overlap portion of two joining members, and a contact portion with the probe is frictionally heated. While softening and agitating, the probe is moved along the butt portion or the overlapping portion while the probe is inserted, or the joining member is moved so that the probe sequentially passes through the butting portion or the overlapping portion. A friction stir welding apparatus configured to perform butt welding or lap welding, wherein a straightening roller is provided to press the welded portion joined by the probe and remove distortion thereof. It is.

[0010] According to this, the joining member is arranged in a butted state or a superposed state, and the rotating probe of the joining tool is inserted into the butted or superposed part. The probe moves along the butted or overlapped portion, or the joining member moves so that the probe passes through the butted or overlapped portion, and is joined at the position where the probe passed in the butted or overlapped portion The portions are formed continuously. This joint undergoes a temperature change in which the temperature rises and then returns to room temperature due to the frictional heat generated by contact with the probe.Therefore, shrinkage stress caused by volume shrinkage due to the temperature drop remains inside the joint. Distortion occurs. Although the joining member tends to deform due to such local residual stress, the distortion is removed by the straightening roller, and the deformation of the joining member is corrected. The straightening by the straightening roller is sequentially performed along with the formation of the joint, and finally, the joint member is straightened over the entire joint.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in FIGS. This embodiment is
By using the friction stir welding apparatus according to the present invention, two long plate-shaped joining members (1) and (2) are butt-joined to produce a large marine floor panel.

As shown in FIG. 1, each of the joining members (1) and (2) is vertically extended along the length direction at a widthwise middle portion of the back surface of the band-shaped flat plate portion (1a) (2a). And an extruded aluminum member having leg portions (1b) and (2b). Then, the top and bottom are reversed and one end surfaces in the width direction are in a state of abutting each other.

The two joining members (1) and (2) arranged in the butt state are friction stir welded at the butt portion (3) by the friction stir welding apparatus of this embodiment. Hereinafter, the friction stir welding apparatus will be described.

In FIG. 1 to FIG. 3, reference numeral (20) denotes a cylindrical support roller for supporting the joining members (1) and (2) from below. Both joining members (1) butted as described above
(2) is a flat plate portion (1) which is one surface in the thickness direction.
a) (2a) They are arranged in such a manner that the lower surface is brought into contact with the peripheral surface of the support roller (20) and in a mode orthogonal to the length direction of the support roller (20). This support roller (2
0) The length of the butted joining members (1) (2)
Is slightly longer than the width of the two joining members (1)
(2) can be reliably supported. Furthermore,
The support roller (20) is rotatably driven and includes a drive mechanism (not shown). The support members (1) and (2) supported by the support rollers (1) and (2) are moved in the longitudinal direction. It also functions as a drive roller for moving in one direction.

At a position above the support roller (20) where the butting portion (3) of the two joining members (1) and (2) passes, a large-diameter cylindrical rotor (11) and the rotor ( 1
A joining tool (10) having a small-diameter pin-like probe (12) integrally provided on the end axis (Q) of (1) attaches the probe (12) to the peripheral surface of the support roller (20). They are arranged in such a manner that they approach each other. The joining tool (1)
0) is such that the probe (12) can also be rotated by rotating the rotor (11), and the probe (12) and the rotor (11) are connected to both joining members (1) ( It is made of a heat-resistant material that is harder than 2) and can withstand frictional heat generated during joining. Further, on the peripheral surface of the probe (12), irregularities for stirring (not shown) of the butting portion (3) are formed. Note that (11
(a) is a shoulder formed of a flat surface on the probe side of the rotor (11).

By arranging the support roller (20) and the probe (12) of the joining tool (10) in this manner, the two joining members (1) butted as described above.
(2) is interposed between the support roller (20) and the probe (12), and the lower surfaces of the joining members (1) and (2) abut against the peripheral surfaces of the support rollers (1) and (2). The probe (12) is inserted into the butting portion (3) while being supported.

Here, the probe (12) of the joining tool (10) is fixedly arranged so that the distance between the tip thereof and the peripheral surface of the support roller (20) is in the range of 0.05 to 0.4 mm. It is desirable. If the distance is less than 0.05 mm, the tip of the probe (12) and the peripheral surface of the support roller (20) may unintentionally come into contact with each other and damage the support roller (20) and the probe (12). On the other hand, if it exceeds 0.4 mm, the distance between the lower surfaces of the joining members (1) and (2) abutted and supported on the peripheral surfaces of the support rollers (1) and (2) becomes too long, and the probe (12) This is because the vicinity of the lower surface of the butting portion (3) of the two joining members (1) and (2) into which is inserted is not softened and agitated, and there is a risk of poor joining at this portion.

Further, as shown in FIG. 2, the joining tool (10) is arranged so that the axis (Q) of the rotor (11) is aligned with the joining members (1) (2) on the peripheral surface of the support roller (20). )
It is arranged in such a manner that it is inclined by an inclination angle (θ) from the direction (P) facing the contact portion with the lower surface toward the moving direction side of the two joining members (1) and (2). The portion of the shoulder (11a) on the moving direction side of the two joining members (1) and (2) comes into contact with the upper surfaces of the two joining members (1) and (2) supported by the support roller (20). on the other hand,
A portion of the shoulder (11a) of the rotor (11) opposite to the moving direction of the two joining members (1) and (2) floats from the upper surfaces of the two joining members (1) and (2). ing. By arranging the joining tool (10) in this manner, the following operation is achieved. That is, the portion of the shoulder (11a) on the moving direction side of the two joining members (1) and (2) comes into contact with the upper surfaces of the two joining members (1) and (2). The material can be prevented from being scattered and further pressurized to ensure a uniform joining state, and frictional heat is generated due to sliding between the upper surfaces of both joining members (1) and (2) and the shoulder (11a). As a result, the softening of the contact portion with the probe (12) or the vicinity thereof is promoted, and the formation of unevenness on the upper surfaces of both the joining members (1) and (2) is prevented, so that the upper surface of the joining portion (4) can be smooth. On the other hand, the portion of the shoulder (11a) on the opposite side in the moving direction of the two joining members (1) and (2) slightly floats from the upper surfaces of the two joining members (1) and (2), so that the two joining members are joined. When the members (1) and (2) are moved, the corners of the shoulder (11a) on the opposite side of the moving direction of the two joining members (1) and (2) form upper surfaces of the two joining members (1) and (2). To prevent the probe (12) from being caught by the fine irregularities that may be present in the joint member (1) and (2) so that the probe (12) can smoothly pass through the butted portion (3). (1) and (2) can be moved.

It is desirable that the inclination angle (θ) is in the range of 1 to 6 °. When the angle is less than 1 °, the corners of the shoulder (11a) on the opposite side of the moving direction of the two joining members (1) and (2) are caught by fine irregularities on the upper surfaces of the two joining members (1) and (2). If it exceeds 6 °, there is a large amount of shaving on the upper surfaces of the joining members (1) and (2) by the shoulders (11a), and burrs are likely to occur.

The joining tool (10) is attached to an elevating device (not shown) and can move up and down. By operating the elevating device, the tip of the probe (12) and the support roller (20) are moved. The distance to the peripheral surface can be finely adjusted, and the probe (12) can be inserted and withdrawn.

As shown in FIGS. 1 and 2, before and after the supporting roller (20) in the moving direction of the two joining members (1) and (2), the driving member (not shown) is driven to rotate. A cylindrical drive roller (21) (22) having the same shape and the same size as the support roller (20) is used as the support roller (20).
And are arranged in parallel. These front and rear drive rollers (2
1) and (22) are a drive device for moving the joining members (1) and (2) supported by the support roller (20) in one direction in the longitudinal direction of the joining members (1) and (2). Make up. In addition, the front and rear drive rollers (21) (2)
2) and the support roller (20) are driven to rotate so that the peripheral speeds thereof are the same.

Further, before and after the probe (12) in the direction of movement of the two joining members (1) and (2), a rotatable pressing roller (having a pressing mechanism (not shown) having the same diameter and the same size) is provided. 30) and (31) correspond to the front and rear drive rollers (2).
1) (22) and the flat plate portions (1) of both joining members (1) and (2).
a) (2a) They are arranged so as to face each other in the thickness direction. These front and rear pressing rollers (30) and (31) are composed of two joining members (1) supported by the supporting roller (20).
This is for pressing (2) against the peripheral surfaces of the front and rear drive rollers (21) and (22). Meanwhile, support rollers (20)
And the probe (12) is interposed between the support rollers (1) and (2), and the probe (12) is inserted into the abutting portion (3) while the lower surface is in contact with and supported by the peripheral surfaces of the support rollers (1) and (2). The two joining members (1) and (2) are pressed against the peripheral surfaces of the front and rear drive rollers (21) and (22) by the front and rear pressing rollers (30) and (31) while maintaining this state. Thus, a driving force in the moving direction is applied without causing a slip. Further, since the front and rear pressing rollers (30) and (31) are rotatable, the peripheral surfaces thereof are moved along with the movement of the two joining members (1) and (2). Are rotated while being pressed against the upper surfaces of the flat plate portions (1a) and (2a).

Further, before and after the probe (12) on both sides in the moving direction of the two joining members (1) and (2), rotatable members having the same diameter and the same size and having a pressing mechanism (not shown) are provided. A pair of guide rollers (40) (40) (41) (4)
1) is arranged in such a manner that its peripheral surface is pressed against the outer surfaces of the leg pieces (1b) and (2b) of both joining members (1) and (2). These front and rear guide rollers (40) (40)
(41) According to (41), the two joining members (1) and (2)
Is arranged at a position where the butting portion (3) passes through the probe (12), and is pressed in the butting direction. The guide rollers (40), (40), (41), and (41)
Since it is rotatable, the peripheral surfaces thereof are pressed against the outer surfaces of the leg pieces (1b) (2b) of the two joining members (1) and (2) as the two joining members (1) and (2) move. It is made to rotate while.

A pair of upper and lower rotatable cylindrical correction rollers (50) (51) having a pressing mechanism (not shown) are provided in front of the probe (12) in the moving direction of the two joining members (1) and (2). ) Are arranged so as to face each other in the thickness direction of the flat plate portions (1a) and (2a) of both the joining members (1) and (2). The upper and lower straightening rollers (50) (5)
Since 1) is rotatable, both joining members (1)
With the movement of (2), the peripheral surface is joined to both joining members (1).
The flat part (1a) (2a) of (2) rotates while being pressed against the upper and lower surfaces, and the distance of the welding tool (10) from the probe (12) is independent of the movement of both welding members (1) and (2). It is to be kept constant. The upper and lower straightening rollers (50) and (51) have a gap between the flattening portions (1).
a) Both joining members (1) set to be slightly smaller than the thickness of (2a) and passed between the upper and lower straightening rollers (50) and (51)
(2) is lightly rolled so that the two joining members (1) and (2) can be corrected and flattened at the joining portion (4). That is, the joint (4) of the two joining members (1) and (2) is brought into a temperature rising state by frictional heat generated by contact with the probe (12), and then the probe (1)
Since the temperature decreases during the movement from 2) to the correction rollers (50) and (51), shrinkage stress generated due to volume shrinkage due to the temperature drop slightly remains therein. The two joining members (1) and (2) are passed between the upper and lower straightening rollers (50) and (51) so that the two joining members (1) and (2) become straightening rollers (50).
A pressing force is received from (51), and the pressing force disperses the residual stress in the joint portion (4), removes distortion, reduces the deformation force, and makes the joint flat. The straightening by the straightening roller is performed successively and continuously with the formation of the joint (4), in other words, with the movement of the two joining members (1) and (2). (1) and (2) are corrected and flattened over the entire joint (4).

Further, in the vicinity of the rear of the upper straightening roller (50) in the moving direction of the two joining members (1) and (2),
The cooling medium injection nozzle (60) of the cooling device is fixedly arranged with its injection port facing the joint (4). The joining portion (4) of the two joining members (1) and (2), which have been heated by frictional heat, is forced by a cooling medium such as a cooling gas (61) or cooling water injected from the nozzle (60). And the temperature is lowered, for example, to around room temperature. Thus, both joining members (1)
By forcibly cooling the joint (4) of (2), before the two joining members (1) and (2) are passed between the straightening rollers (50) and (51), a temperature is previously applied to the joint (4). Most of the contraction stress accompanying the descent can be generated. And
By passing the two joining members (1) and (2) in such a state between the straightening rollers (50) and (51), the two joining members (1) and (2) become straightening rollers (50) and (51). The distortion is removed by the pressing force from, the deformation is reduced, and the surface becomes flat. Here, as described above, before the two joining members (1) and (2) are passed between the straightening rollers (50) and (51),
Since most of the shrinkage stress due to the temperature drop is generated at the joint (4), the straightening rollers (50) (5)
1) Even after passing, deformation due to temperature drop hardly occurs, and a flat state is maintained.

Next, a case where friction stir welding is performed using the above friction stir welding apparatus will be described.

First, the probe (12) is supported by the support roller (2).
In the state of waiting at the upper separated position of (0), the driving roller (22) and the pressing roller (3) for rotating one end in the length direction of the two joining members (1) and (2) arranged in abutting state.
1). At this time, both joining members (1) and (2)
The outer surfaces of the leg portions (1b) and (2b) are pressed against the peripheral surfaces of the guide rollers (41) and (41).
The butting portion (3) is arranged at a position passing through the probe (12), and is in a state of being pressed in the butting direction.

Driving roller (22) and holding roller (31)
The two joining members (1) and (2) passed through are pressed against the peripheral surface of the driving roller (22) by the pressing roller (31), and a driving force is applied from the driving roller (31). Support roller (20) and probe (12) by force
To move between.

Butt (3) of both joining members (1) and (2)
When the expected joining start position reaches the peripheral surface of the support roller (20), the movement of the joining members (1) and (2) is temporarily stopped. Then, the probe (12) is lowered while rotating. The tip of the probe (12) has two joining members (1)
When the butt portion (3) comes into contact with the butt portion (3), the contact portion softens due to frictional heat. Therefore, the probe (12) is further lowered and inserted into the butt portion (3). The distance of the peripheral surface of (20) is 0.05-0.
The probe (12) is stopped and fixed in a state of 4 mm.

In this manner, the probe (12) is inserted into the butting portion (3) with the two joining members (1) and (2) interposed between the support roller (20) and the probe (12). The back surface of the butting portion (3) is supported in contact with the peripheral surface of the support roller (20). The probe (1
2) is lowered in advance, and the joining members (1) and (2) are forcibly passed between the probe (12) and the support roller (20) to move the joining members (1) and (2). At the front end face in the direction, the probe (12) may be inserted into the butting portion (3) from the side to be in the inserted state.

Next, the drive rollers (21) and (22) and the support roller (20) are driven again. The two joining members (1) and (2) in which the probe (12) is inserted into the butting portion (3) are further provided with a driving force from the support roller (20), so that the drive roller (21) and the support roller (20) are moved. By driving force,
In a state where the lower surface is abutted on the peripheral surface of the support roller (20) and the probe (12) is inserted into the butting portion (3),
The driving roller (21) and the pressing roller (3) are moved while the butting portion (3) sequentially passes through the probe (12).
0). Also, since the joining tool (10) is slightly inclined, the shoulder (11) of the rotor (11) is
The portion on the moving direction side of both joining members (1) and (2) in a) comes into contact with the upper surfaces of both joining members (1) and (2), and the shoulder (11a) of the rotor (11). The part on the opposite side to the moving direction of both joining members (1) and (2) in
It is in a state of slightly rising from the upper surfaces of both joining members (1) and (2).

Driving roller (21) and press roller (30)
The two joining members (1) and (2) passed through are pressed against the peripheral surface of the driving roller (30) by the pressing roller (21), and the driving force is further applied from the driving roller (30).
The guide rollers (40) and (40) move toward the guide rollers (40) and (40) by the driving forces of the drive rollers (22) and (21) and the support roller (20). 40) It is in a state of being pressed against the peripheral surface of (40).

The joining members (1) and (2) are forced to cool their joints (4) by the cooling gas (61) injected from the nozzle (60), and the upper and lower straightening rollers (50) and (51). ) And pressurized and straightened at the joint (4).

As described above, when the two joining members (1) and (2) move so that the butting portion (3) sequentially passes through the probe (12), the contact portion with the probe (12) generates frictional heat. The two joining members (1) and (2) are sequentially softened and agitated.
Are joined and integrated at the butting portion (3). That is, the frictional heat generated by the rotation of the probe (12) or the frictional heat generated by the sliding between the shoulder (11a) of the rotor (11) and the upper surfaces of the two joining members (1) and (2). The two joining members (1) and (2) are softened and agitated in the vicinity of the contact portion with the probe (12), and the softened and agitated portion is moved by the probe as the two joining members (1) and (2) move. After plastic flow so as to fill the passage groove of (12), frictional heat is rapidly lost and solidified by cooling. This phenomenon is repeated sequentially with the movement of the two joining members (1) and (2), and finally the two joining members (1) and (2) are joined and integrated at the butt portion (3).

The portion of the shoulder (11a) of the rotor (11) on the moving direction side of the two joining members (1) and (2) is
Since the two joining members (1) and (2) move under the state of being in contact with the upper surfaces of the two joining members (1) and (2), scattering of the material in the softened portion is prevented and uniform pressure is applied. The joining state is reliably realized, and both joining members (1) and (2)
The formation of unevenness on the upper surface is prevented, and the upper surface of the joint (4) becomes smooth.

The distance from the tip of the probe (12) to the peripheral surface of the supporting roller (20) is
Since both are constant even when they rotate, both joining members (1)
In (2), the distance between the tip and the lower surface of the probe (12) is moved so as to always take a constant value, and the joining state becomes uniform.

Since the two joining members (1) and (2) are pressed in the butting direction by the guide rollers (40), (40), (41) and (41), the softened portion of the butting portion (3) is reduced. The gap formed in the butting portion (3) disappears due to the close contact deformation, and the air existing in the gap disappears from the joining portion (4).
Escape to the outside and entrainment of air into the joint (4) is prevented.

Further, the two joining members (1) and (2) are forcedly cooled by the cooling gas (61) ejected from the nozzle (60) at the joint (4), and the upper and lower straightening rollers (5) are joined together.
0) and (51), so that the joint (4)
Is passed between the upper and lower straightening rollers (50) and (51) in a state where most of the shrinkage stress accompanying the temperature drop is generated. And
Both joining members (1) and (2) are provided with straightening rollers (50) and (5).
A pressing force is applied from 1), and the pressing force disperses the residual stress in the joint portion (4), removes distortion, relaxes the deformation force, and becomes flat. This straightening roller (50) (5
The correction according to 1) is sequentially performed along with the formation of the joint (4), and finally, the joint members (1) and (2) are corrected throughout the joint (4) so that there is no twist or warpage. It becomes flat. Here, before the two joining members (1) and (2) are passed between the straightening rollers (50) and (51), the joining portion (4) is formed.
Since most of the shrinkage stress is generated due to the temperature drop, even after passing through the straightening rollers (50) and (51), there is almost no deformation due to the temperature drop, and the flat state is maintained.

In this manner, the two joining members (1) and (2) are joined and integrated, and the entire joining portion (4) is corrected so that the joining state is uniform and air is wound around the joining portion (4). Thus, a marine floor panel having a small flattening and therefore having a small number of joint defects and a high flatness can be obtained.

Further, the friction stir welding apparatus of this embodiment has the following additional effects.

For example, as shown in FIG. 4A, as the joining members (1) and (2), a flat plate portion (1) is used for the purpose of increasing the joining area of the joining portion and improving the joining strength.
a) Thick portions (1c) (2c) at the butted portion of (2a)
May be used. When butt welding is performed by friction stir welding as described above using such joining members (1) and (2), the joining members (1) and (2)
After passing the probe (12) of the welding tool (10), as shown in FIG. 2 (b), the thick portions (1c) and (2c) are substantially circular by the shoulder (11a) of the rotor (11). An arc-shaped cutting mark (5) may be formed, and the appearance may be reduced. However, since this friction stir welding apparatus is provided with the straightening rollers (50) and (51) as described above,
The joints (4) of the joining members (1) and (2) are lightly pressed by the straightening rollers (50) and (51), and are shown in FIG.
As shown in (5), the shaving marks (5) almost disappear, and the appearance is maintained.

As described above, the correction rollers (50) and (51)
Is to substantially eliminate joint marks such as the above-mentioned cut marks (5) formed on the surface of the joint members (1) and (2) on the insertion side of the probe (12), and to improve the appearance of the joint article obtained. Can be. The pressing of the joint (4) by the straightening rollers (50) and (51) is performed at a maximum depth of 0.2 to 0.3 mm.
It is preferable that the maximum depth is 0.05 mm or less (including zero) with respect to the shaving marks (5).

The embodiment of the present invention has been described above.
The present invention is not limited to the above embodiment.
For example, in the above embodiment, the probe (12) is inserted into the butting portion (3),
The two joining members (1) and (2) are butt-joined by moving the two joining members (1) and (2) so that the probe (12) sequentially passes through the butt portion (3).
In the present invention, in addition to this, the two joining members (1) and (2) are placed on a base (not shown) such as a surface plate and the probe (12) is inserted into the butting portion (3). By moving the probe (12) along the butting portion (3) with the probe inserted, the two joining members (1) and (2) are moved.
May be butt-joined. In this case,
As the correction roller (50), one that moves together with the probe (12) and maintains a constant distance from the probe (12) is preferably used. In the above embodiment, the joining members are joined and integrated by butt joining. However, the present invention may be such that the joining members are joined and integrated by lap joining.

[0044]

As described above, since the friction stir welding apparatus according to the present invention is provided with the straightening roller for pressing the welding portion joined by the probe to remove the distortion, the joining member is joined to the joining member. It can be corrected in all areas. As a result, it is possible to manufacture a joined product without deformation such as twisting and warping.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a friction stir welding apparatus according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 shows a joining member and upper and lower correction rollers in FIG. 1;
FIG. 3 is a sectional view taken along line III-III.

FIG. 4 is a partial cross-sectional view showing a modification of the joining member, wherein (a) shows a state before joining, (b) shows a state after passing a probe, and (c) shows a state after passing a straightening roller. Things.

FIG. 5 is a perspective view for explaining a friction stir welding method.

[Explanation of symbols]

 1, 2 joining member 3 ... butting portion 4 ... joining portion 10 ... joining device 12 ... probe 20 ... support roller (drive roller) 21, 22 ... drive roller 30, 31 ... holding roller 40, 41 ... guide roller 50, 51 … Straightening roller 60… nozzle for cooling medium injection

Claims (1)

[Claims] 1. A rotating probe (12) is inserted into a butt portion (3) or a superposed portion of two joining members (1) and (2), and a contact portion with the probe is softened by frictional heat and stirred. While the probe is being inserted, move the probe (12) along the butt portion or overlapped portion, or move the probe (1
The joining members (1) and (2) are moved so that the joining members (1) and (2) are sequentially moved through the butt portion (3) or the overlapping portion, thereby performing butt joining or lap joining of the joining members (1) and (2). A friction stir welding apparatus comprising a straightening roller (50) for pressing a joint (4) joined by said probe (12) to remove distortion thereof. Joining equipment.