JPWO2020032141A1 - Friction stir welding device and its operation method - Google Patents

Abstract

A friction stir welding device consisting of an aluminum member (W1) and a galvanized steel member (W2) that joins an object to be welded (W) by softening it with frictional heat. A shoulder member (2) and a pin member (1), which are formed, have a pin member (1) inserted therein, and are configured to be able to move forward and backward in a direction along an axis (Xr). A rotary drive (5) configured to rotate around the axis (Xr) and not to rotate the shoulder member (2), and a pin member (1) and a shoulder member (2) along the axis (Xr). A friction stir welding device including a linear drive (4) for advancing and retreating, and an aluminum member (W1) arranged so as to face the pin member (1).

Description

The present invention relates to a friction stir welding apparatus and an operating method thereof.

A friction point joining device for joining an aluminum material and a galvanized steel sheet is known (see, for example, Patent Document 1). The friction point joining device disclosed in Patent Document 1 includes a tool temperature measuring device for measuring the temperature of a rotating tool, and a material temperature measuring device for measuring the temperature of a joint portion between an aluminum material and a zinc-plated steel plate. , And the feedback device applies feedback control to the servo motor that rotates the rotating tool based on the temperature information of the tool temperature measuring device and the material temperature measuring device.

Specifically, in the friction point joining device disclosed in Patent Document 1, the distance between the tips of the tools is maintained in the range of 0.1 to 0.3 mm on the aluminum material side, and the aluminum material and the galvanized steel plate are maintained. By setting the temperature of the joint portion in the range of 320 to 350 ° C., the joint portion is made into a new surface, and friction point bonding is performed while forming an intermetallic compound of Fe and Al in the joint portion.

Japanese Unexamined Patent Publication No. 2016-12402

However, the friction point joining device disclosed in Patent Document 1 needs to be provided with two temperature measuring devices, which increases the manufacturing cost of the device. Further, in the friction point joining device disclosed in Patent Document 1, it is necessary to perform feedback control based on the temperature information from the temperature measuring device, and the position of the tip of the tool must be maintained within a predetermined range. The control program became complicated because it had to be done, and there was still room for improvement.

The present invention has been made to solve the above problems, and provides a friction stir welding apparatus and an operating method thereof capable of joining an aluminum member and a galvanized steel member with high strength with a simple configuration. The purpose is to provide.

In order to solve the above-mentioned conventional problems, the friction stir welding device according to the present invention is a friction stir welding device composed of an aluminum member and a galvanized steel member, which is joined by softening an object to be joined by frictional heat. , A pin member formed in a columnar shape and configured to be able to rotate around an axis and move forward and backward along the axis, and a pin member formed in a cylindrical shape, and the pin member is inserted into the inside. The shoulder member is configured to be able to move forward and backward along the axis, and the pin member is rotated around the axis so that the shoulder member is not rotated around the axis. A rotary drive is provided, and a linear drive that moves the pin member and the shoulder member forward and backward along the axis, and the aluminum member is arranged so as to face the pin member. ..

As a result, the amount of heat input from the shoulder member to the galvanized steel member via the aluminum member can be reduced, and the melting of zinc can be suppressed. Therefore, it is possible to prevent the molten zinc from invading the aluminum member, so that it is possible to prevent the zinc and aluminum from reacting with each other to cause liquefaction cracking. Therefore, the aluminum member and the galvanized steel member can be joined with high strength.

The operation method of the friction stir welding device according to the present invention is the operation method of the friction stir welding device which is composed of an aluminum member and a zinc-plated steel member and joins by softening the object to be welded by frictional heat. The friction stir welding device is formed in a cylindrical shape, and is formed in a cylindrical shape with a pin member configured to be able to rotate around an axis and move forward and backward in a direction along the axis. Is inserted inside and is configured to be able to move forward and backward along the axis, and the pin member is rotated around the axis to move the shoulder member around the axis. A rotary drive that is configured not to rotate and a linear drive that moves the pin member and the shoulder member forward and backward along the axis are provided so that the aluminum member faces the pin member. In a state where the pin member is rotated and the shoulder member is not rotated, the linear motion drive is such that the tip end portion of the pin member presses the jointed portion of the joined object. And (A) when the rotary drive operates, the pin member so that the linear drive and the rotary drive operate and the softened zinc-plated steel member pierces the softened aluminum member. When the tip of the pin member reaches a predetermined first position set in advance (B), after the (B), the tip of the pin member is subjected to the jointed portion in a state where the pin member is rotated. The linear drive and the rotary drive operate (C) so as to be pulled out from.

As a result, the amount of heat input from the shoulder member to the galvanized steel member via the aluminum member can be reduced, and the melting of zinc can be suppressed. Therefore, it is possible to prevent the molten zinc from invading the aluminum member, so that it is possible to prevent the zinc and aluminum from reacting with each other to cause liquefaction cracking. Therefore, the aluminum member and the galvanized steel member can be joined with high strength.

Further, when the softened galvanized steel member pierces the softened aluminum member, an anchor effect can be obtained and the tensile strength of the object to be joined can be improved.

The above objectives, other objectives, features, and advantages of the present invention will be apparent from the detailed description of the preferred embodiments below, with reference to the accompanying drawings.

According to the friction stir welding apparatus and the operation method thereof according to the present invention, it is possible to join an aluminum member and a galvanized steel member with high strength with a simple structure.

FIG. 1 is a schematic view showing a schematic configuration of a friction stir welding apparatus according to the first embodiment. FIG. 2 is a flowchart showing an example of the operation of the friction stir welding apparatus according to the first embodiment. FIG. 3 is a schematic view showing a main part of the friction stir welding apparatus according to the first embodiment. FIG. 4 is a schematic view showing a schematic configuration of the friction stir welding apparatus according to the second embodiment.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following, the same or corresponding elements will be designated by the same reference numerals throughout all the figures, and duplicate description thereof will be omitted. Further, in all the drawings, the components necessary for explaining the present invention are excerpted and illustrated, and the other components may be omitted from the illustration. Furthermore, the present invention is not limited to the following embodiments.

(Embodiment 1)
The friction stir welding device according to the first embodiment is a friction stir welding device composed of an aluminum member and a galvanized steel member, which is joined by softening an object to be joined by frictional heat, and is formed in a columnar shape. A pin member that is configured to be able to rotate around an axis and move forward and backward along the axis, and a cylindrically formed pin member that is inserted inside and is oriented along the axis. A shoulder member configured to be able to move forward and backward, a rotary driver configured to rotate the pin member around the axis and not to rotate the shoulder member around the axis, and a pin member and a shoulder member. The aluminum member is arranged so as to face the pin member.

Further, in the friction stir welding apparatus according to the first embodiment, the tip portion of the pin member may be formed so as to protrude from the tip portion of the shoulder member.

Further, in the friction stir welding apparatus according to the first embodiment, the tip of the pin member presses the bonded portion of the object to be joined while the pin member is rotated and the shoulder member is not rotated. In (A), the linear drive and the rotary drive are controlled, and the linear drive and the rotary drive are controlled so that the softened galvanized steel member pierces the softened aluminum member. After (B) and (B), the tip of the pin member is pulled out from the jointed portion while the pin member is rotated. , (C) for controlling the linear drive and the rotary drive, and may further include a control device configured to perform.

Further, in the friction stir welding device according to the first embodiment, the rotary driver has a transmission mechanism that transmits the rotary drive of the motor and the motor to the pin member, and the transmission mechanism transmits the rotary drive of the motor to the shoulder member. It may be configured not to transmit.

Hereinafter, an example of the friction stir welding apparatus according to the first embodiment will be described in detail with reference to FIGS. 1 to 3.

[Structure of friction stir welding device]
FIG. 1 is a schematic view showing a schematic configuration of a friction stir welding apparatus according to the first embodiment.

As shown in FIG. 1, the friction stir welding device 100 according to the first embodiment includes a pin member 1, a shoulder member 2, a tool fixture 3, a linear drive drive 4, a rotary drive 5, and a backing support member 6. The backing member 7, the robot 8, and the control device 110 are provided, and the jointed portion Wa of the object to be joined W is softened by frictional heat to be joined.

In the first embodiment, the object to be joined W is composed of a plate-shaped aluminum member W1 and a plate-shaped galvanized steel member W2. In the first embodiment, the object to be joined W is composed of a plate-shaped aluminum member W1 and a plate-shaped galvanized steel member W2, but the method is not limited to this, and the object to be joined is not limited to this. The shape of W (aluminum member W1 and galvanized steel member W2) is arbitrary, and may be formed in a rectangular parallelepiped shape or an arc shape, for example.

The pin member 1, the shoulder member 2, the tool fixture 3, the linear motion drive 4, and the rotary drive 5 are provided above the backing support member 6 composed of a C-type gun (C-type frame). .. Further, a backing member 7 is provided below the backing support member 6. The pin member 1, the shoulder member 2, and the backing member 7 are attached to the backing support member 6 at positions facing each other. The backing support member 6 is attached to the tip of the robot 8. As the robot 8, a robot such as a horizontal articulated type or a vertical articulated type can be adopted.

The friction stir welding device 100 according to the first embodiment is not limited to the case where it is applied to the robot 8, and is known, for example, an NC machine tool, a large C frame, an auto riveter, or the like. It may be applied to equipment.

Further, in the first embodiment, the backing support member 6 is composed of a C-shaped gun, but the present invention is not limited to this. The backing support member 6 is configured as long as the pin member 1 and the shoulder member 2 can be moved forward and backward and the backing member 7 can be supported at a position facing the pin member 1 and the shoulder member 2. It may have been.

The backing member 7 is formed in a flat plate shape and is configured to support the object W to be joined. The structure of the backing member 7 is not particularly limited as long as it can appropriately support the object W to be welded so that friction stir welding can be performed. The backing member 7 may be configured such that, for example, a plurality of backing members having various shapes are separately prepared and can be replaced according to the shape of the object to be joined W.

The pin member 1 and the shoulder member 2 are supported by the tool fixture 3, and are configured to be driven forward and backward in the vertical direction by the linear drive drive 4. As the linear motion drive 4, for example, an electric motor (servo motor) and a ball screw, a linear guide, or the like may be used, or an air cylinder or the like may be used.

Further, the pin member 1 is formed in a substantially cylindrical shape, and is configured to be rotatable around the axis Xr of the pin member 1 by a rotation driver 5. The rotation drive 5 has a motor 51 and a transmission mechanism 52 that transmits the rotation drive of the motor 51 to the pin member 1. As the motor 51, for example, an electric motor (servo motor) may be used. Further, the transmission mechanism 52 is configured so as not to transmit the rotational drive of the motor 51 to the shoulder member 2. As the transmission mechanism 52, a rotation transmission mechanism using a known gear or the like may be used.

In the first embodiment, as shown in FIG. 1, the transmission mechanism 52 mechanically transmits the rotational drive from the motor 51 only to the pin member 1, and to the shoulder member 2 from the motor 51. The form is configured so as not to transmit the rotational drive of the above, but the present invention is not limited to this. The transmission mechanism 52 electrically transmits the rotational drive from the motor 51 only to the pin member 1, and does not transmit the rotational drive from the motor 51 to the shoulder member 2. May be good.

Here, "electrically" may mean that the transmission mechanism 52 does not transmit the rotational drive from the motor 51 to the shoulder member 2 because the electric power (current) is not supplied to the transmission mechanism 52. Further, the transmission mechanism 52 outputs the electric signal (control signal) prohibiting the operation from the control device 110 to the shoulder member 2, so that the transmission mechanism 52 does not transmit the rotational drive from the motor 51 to the shoulder member 2. It may be.

The shoulder member 2 is formed in a substantially cylindrical shape having a hollow, and the pin member 1 is interpolated in the hollow of the shoulder member 2. Further, in the first embodiment, the pin member 1 and the shoulder member 2 are arranged so that the tip portion 1a of the pin member 1 protrudes from the tip portion 2a of the shoulder member 2. Further, as described above, the shoulder member 2 is configured by the rotation driver 5 so as not to rotate around the axis Xr.

In the first embodiment, the pin member 1 and the shoulder member 2 are configured to be movable back and forth by the linear drive drive 4, but the present embodiment is not limited to this. A form may be adopted in which the pin member 1 and the shoulder member 2 are independently configured to be able to move forward and backward.

The control device 110 includes an arithmetic processor such as a microprocessor and a CPU, and a storage device such as a ROM and a RAM (not shown). Information such as basic programs and various fixed data is stored in the storage device. The arithmetic processor controls various operations of the linear motion drive 4, the rotary drive 5, and the robot 8 by reading and executing software such as a basic program stored in the storage.

The control device 110 may be composed of a single control device 110 for centralized control, or may be composed of a plurality of control devices 110 for distributed control in cooperation with each other. Further, the control device 110 may be composed of a microcomputer, an MPU, a PLC (Programmable Logic Controller), a logic circuit, or the like.

[Operation of friction stir welding device (operation method of friction stir welding device)]
Next, the operation method of the friction stir welding apparatus 100 according to the first embodiment will be described with reference to FIGS. 1 to 3. The following operations are executed by the arithmetic processor of the control device 110 reading the program stored in the storage device.

FIG. 2 is a flowchart showing an example of the operation of the friction stir welding apparatus according to the first embodiment. FIG. 3 is a schematic view showing a main part of the friction stir welding apparatus according to the first embodiment, and shows a state in which friction stir welding is executed.

First, the operator places the object to be joined W on the upper surface of the backing member 7. Then, the operator operates an input device (not shown) to input the joining execution of the object W to be joined to the control device 110.

Then, as shown in FIG. 2, the control device 110 drives the rotation drive 5 to rotate the pin member 1 at a predetermined rotation speed (for example, 500 to 3000 rpm) (step S101). Next, the control device 110 drives the linear motion drive 4 in a state where the pin member 1 is rotated and the shoulder member 2 is not rotated to advance the pin member 1 and the shoulder member 2 to advance the pin. The tip of the member 1 is brought into contact with the jointed portion Wa of the joined object W (step S102).

Next, the control device 110 drives the linear motion drive 4 so that the tip end portion of the pin member 1 moves to a predetermined first position set in advance (step S103). At this time, the control device 110 controls the linear motion drive 4 so that the pin member 1 presses the object W to be joined with a predetermined pressing force (for example, 4 kN to 70 kN) set in advance.

The predetermined number of rotations and the predetermined pressing force can be appropriately set by experiments or the like in advance. Further, the position information of the tip of the pin member 1 is detected by a position detector (not shown) and output to the control device 110.

Here, the first position is 0 when the surface of the galvanized steel member W2 in contact with the aluminum member W1 is 0% and the surface of the galvanized steel member W2 in contact with the backing member 7 is 100%. A position that is arbitrarily set between% and less than 100%. From the viewpoint of improving the joint strength, the first position should be closer to the surface of the galvanized steel member W2 in contact with the backing member 7, and may be 25% or more, 50% or more. It may be 75% or more, 80% or more, 90% or more, or 95% or more.

As a result, the pin member 1 comes into contact with the bonded portion Wa of the object W to be joined, and frictional heat is generated due to friction between the tip portion of the pin member 1 and the bonded portion Wa, and the bonded object W is bonded. Part Wa is softened to generate plastic flow.

Then, as shown in FIG. 3, the tip portion of the pin member 1 is press-fitted into the jointed portion Wa, so that the second softened portion 42, which is the softened portion of the galvanized steel member W2, becomes the aluminum member W1. It enters (pierces) the first softened portion 41, which is the softened portion of the above.

At this time, in the friction stir welding device 100 according to the first embodiment, since the shoulder member 2 is not rotating, the pin member 1 and the shoulder member 2 are configured to rotate, which is a conventional friction stir welding device. The amount of heat input to the aluminum member W1 is reduced as compared with the above. As a result, the amount of heat input from the aluminum member W1 to the galvanized steel member W2 can be reduced, and the melting of zinc can be suppressed.

Therefore, it is possible to prevent the molten zinc from invading the aluminum member W1, and thus it is possible to prevent the zinc and aluminum from reacting with each other to cause liquefaction cracking. Therefore, the aluminum member W1 and the galvanized steel member W2 can be joined with high strength.

In the present specification, the second softened portion 42 that has entered the first softened portion 41 is referred to as an anchor portion.

Next, the control device 110 determines whether or not the tip of the pin member 1 has reached the first position based on the position information of the tip of the pin member 1 detected by the position detector (not shown). (Step S104). When the control device 110 determines that the tip of the pin member 1 has not reached the first position (No in step S104), until the tip of the pin member 1 reaches the first position. Each process of step S103 to step S104 is executed. On the other hand, when the control device 110 determines that the tip of the pin member 1 has reached the first position (Yes in step S104), the control device 110 executes the process of step S105.

In step S105, the control device 110 pulls out the tip end portion of the pin member 1 from the jointed portion Wa in a state where the pin member 1 is rotated and the shoulder member 2 is not rotated (pin member 1 and shoulder member 2). The linear drive drive 4 is driven so that the tip end portion of the joint W is separated from the surface of the object W to be joined). Then, when the tip end portion of the pin member 1 is pulled out from the joined portion Wa, the control device 110 stops the rotation drive 5 so as to stop the rotation of the pin member 1, and ends this program. When joining a plurality of joined portions Wa, the control device 110 may be configured to start joining the next joined portion Wa without stopping the rotation of the pin member 1. ..

In the friction stir welding apparatus 100 according to the first embodiment configured in this way, the second softened portion 42 of the galvanized steel member W2 is formed by performing friction stir welding on the object W to be joined. Anchor effect such that the aluminum member W1 enters the first softened portion 41, the strength against tensile shear becomes high, and the peel strength becomes relatively high can be obtained.

Further, in the friction stir welding device 100 according to the first embodiment, the shoulder member 2 is configured so as not to rotate. As a result, the amount of heat input from the shoulder member 2 to the galvanized steel member W2 via the aluminum member W1 can be reduced, and the melting of zinc can be suppressed.

Therefore, it is possible to prevent the molten zinc from invading the aluminum member W1, and thus it is possible to prevent the zinc and aluminum from reacting with each other to cause liquefaction cracking. Therefore, the aluminum member W1 and the galvanized steel member W2 can be joined with high strength.

(Embodiment 2)
The friction stir welding device according to the second embodiment is the friction stir welding device according to the first embodiment, wherein the rotation driver transmits the motor and the rotation drive of the motor to the pin member and the shoulder member. It has a block mechanism that blocks the transmission of the rotational drive of the motor to the shoulder member.

Hereinafter, an example of the friction stir welding apparatus according to the second embodiment will be described in detail with reference to FIG.

[Structure of friction stir welding device]
FIG. 4 is a schematic view showing a schematic configuration of the friction stir welding apparatus according to the second embodiment.

As shown in FIG. 4, the friction stir welding device 100 according to the second embodiment has the same basic configuration as the friction stir welding device 100 according to the first embodiment, but the configuration of the rotary driver 5 is different. ..

Specifically, the rotary drive 5 blocks the motor 51, the transmission mechanism 52 that transmits the rotational drive of the motor 51 to the pin member 1 and the shoulder member 2, and the transmission of the rotational drive of the motor 51 to the shoulder member 2. It has a block mechanism 53 and a block mechanism 53. The transmission mechanism 52 includes a first transmission mechanism 52a that transmits the rotational drive of the motor 51 to the pin member 1, and a second transmission mechanism 52b that transmits the rotational drive of the motor 51 to the shoulder member 2.

The block mechanism 53 may be configured to mechanically or electrically transmit the rotational drive from the motor 51 only to the pin member 1 and not to transmit the rotational drive from the motor 51 to the shoulder member 2. ..

Here, "mechanically" may mean, for example, a mode in which the block mechanism 53 disengages the gears and the like so that the rotational drive from the motor 51 is not transmitted to the shoulder member 2. Further, for example, the block mechanism 53 may be in a mode in which the rotation drive from the motor 51 is not transmitted to the shoulder member 2 by stopping the rotation of the gear or the like.

Further, "electrically" means, for example, that the block mechanism 53 does not supply electric power (current) to the transmission mechanism 52, so that the rotational drive from the motor 51 is not transmitted from the transmission mechanism 52 to the shoulder member 2. There may be. Further, for example, the rotation drive from the motor 51 is transmitted to the shoulder member 2 by outputting an electric signal (control signal) prohibiting the operation of the transmission mechanism 52 to the shoulder member 2 from the control device 110 to the transmission mechanism 52. It may be a mode that is not performed. In this case, the control device 110 has the function of the block mechanism 53.

Even the friction stir welding device 100 according to the second embodiment, which is configured in this way, has the same effect and effect as the friction stir welding device 100 according to the first embodiment.

From the above description, many improvements or other embodiments of the present invention will be apparent to those skilled in the art. Therefore, the above description should be construed as an example only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the present invention. The details of its structure and / or function can be substantially changed without departing from the present invention. In addition, various inventions can be formed by an appropriate combination of the plurality of components disclosed in the above-described embodiment.

The friction stir welding apparatus and its operating method of the present invention are useful because they can join an aluminum member and a galvanized steel member with high strength with a simple structure.

1 Pin member 2 Shoulder member 2a Tip 3 Tool fixture 4 Linear drive 5 Rotational drive 6 Support member 7 Backing member 8 Robot 41 1st softening part 42 2nd softening part 51 Motor 52a 1st transmission mechanism 52b 2 Transmission mechanism 52 Transmission mechanism 53 Block mechanism 100 Friction stir welding device 110 Control device Xr Axis W Jointed object Wa Jointed part W1 Aluminum member W2 Galvanized steel member

Claims (9)

A friction stir welding device that joins an object to be joined by softening it with frictional heat, which consists of an aluminum member and a galvanized steel member.
A pin member that is formed in a columnar shape and is configured to be able to rotate around an axis and move forward and backward along the axis.
A shoulder member which is formed in a cylindrical shape, the pin member is inserted therein, and is configured to be able to move forward and backward in a direction along the axis.
A rotary driver configured to rotate the pin member around the axis and not to rotate the shoulder member around the axis.
A linear drive that moves the pin member and the shoulder member forward and backward along the axis is provided.
A friction stir welding device in which the aluminum member is arranged so as to face the pin member. The friction stir welding device according to claim 1, wherein the tip portion of the pin member is formed so as to protrude from the tip portion of the shoulder member. The linear drive and the rotary drive so that the tip of the pin member presses the jointed portion of the object to be joined while the pin member is rotated and the shoulder member is not rotated. When controlling the vessel (A),
A predetermined first portion in which the tip portion of the pin member is preset so that the softened galvanized steel member pierces the softened aluminum member by controlling the linear motion driver and the rotary driver. When the position is reached (B),
After the (B), the linear drive and the above are such that the tip portion of the pin member is pulled out from the joined portion in a state where the pin member is rotated and the shoulder member is not rotated. The friction stir welding device according to claim 1 or 2, further comprising a control device configured to control (C) the rotary drive. The rotary drive has a motor and a transmission mechanism for transmitting the rotary drive of the motor to the pin member.
The friction stir welding device according to any one of claims 1 to 3, wherein the transmission mechanism is configured so as not to transmit the rotational drive of the motor to the shoulder member. The rotary drive has a motor, a transmission mechanism that transmits the rotary drive of the motor to the pin member and the shoulder member, and a block mechanism that blocks transmission of the rotary drive of the motor to the shoulder member. , The friction stir welding apparatus according to any one of claims 1 to 3. It is an operation method of a friction stir welding device that joins by softening an object to be joined by frictional heat, which consists of an aluminum member and a galvanized steel member.
The friction stir welding device
A pin member that is formed in a columnar shape and is configured to be able to rotate around an axis and move forward and backward along the axis.
A shoulder member which is formed in a cylindrical shape, the pin member is inserted therein, and is configured to be able to move forward and backward in a direction along the axis.
A rotary driver configured to rotate the pin member around the axis and not to rotate the shoulder member around the axis.
A linear drive that moves the pin member and the shoulder member forward and backward along the axis is provided.
The aluminum member is arranged so as to face the pin member.
The linear drive and the rotary drive so that the tip of the pin member presses the jointed portion of the object to be joined while the pin member is rotated and the shoulder member is not rotated. When the vessel operates (A),
A predetermined first portion in which the tip end portion of the pin member is preset so that the galvanized steel member softened by the operation of the linear drive and the rotary drive pierces the softened aluminum member. When the position is reached (B),
After the (B), the linear drive and the above are such that the tip portion of the pin member is pulled out from the joined portion in a state where the pin member is rotated and the shoulder member is not rotated. A method of operating a friction stir welding device, comprising (C) in which a rotary driver operates. The operation method of the friction stir welding device according to claim 6, wherein the tip portion of the pin member is formed so as to protrude from the tip portion of the shoulder member. The rotary drive has a motor and a transmission mechanism for transmitting the rotary drive of the motor to the pin member.
The operation method of the friction stir welding device according to claim 6 or 7, wherein the transmission mechanism is configured so as not to transmit the rotational drive of the motor to the shoulder member. The rotary drive has a motor, a transmission mechanism that transmits the rotary drive of the motor to the pin member and the shoulder member, and a block mechanism that blocks transmission of the rotary drive of the motor to the shoulder member. , The method of operating the friction stir welding device according to claim 6 or 7.

Images