JP2019141871A - Friction stir welding device - Google Patents

Abstract

To provide a friction stir welding device capable of carrying out a main welding operation by a simple manual operation without resorting to an automatic control following an NC program and capable of easily corresponding even in the welding operation of a small amount of products.SOLUTION: A friction stir welding device 1 carries out such an operation as relatively moving a rotary tool 3 or a welded material 2 by pressing the rotary tool 3 to the welded material 2 to weld the material 2 by friction stir welding. The device comprises: driving means for moving the rotary tool 3 or the welded material 2; a handle lever 5 tilted by manual operation for manually operating the movement of the tool 3 or material 2; and control means for motion-controlling the driving means to move the tool 3 or material 2 by engaging with the manual operation of the handle lever 5 in response to the operation amount based on the direction to which the handle lever 5 is fallen and an inclination angle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a friction stir welding apparatus that can perform a joining operation of materials to be joined by manual operation.

  Friction stir welding is a technique for joining materials to be joined by softening the joints by frictional heat generated when a rotary tool is pressed against the joints of the materials to be joined and stirring them by rotational force (Patent Document 1). Such). Conventionally, in a friction stir welding apparatus, operations such as moving a rotary tool relative to a material to be joined are performed by automatic control using an NC program.

Japanese National Patent Publication No. 9-508073 Japanese Patent Laying-Open No. 2015-182133 JP 2001-287054 A

  In order to perform the friction stir welding well, it is extremely important to set the welding conditions such as the moving speed and moving position of the rotating tool in addition to the rotational speed of the rotating tool and the insertion position of the rotating tool. In the conventional friction stir welding apparatus, the joining operation is performed fully automatically using an NC program in which these joining conditions are set. Such an apparatus is suitable for the production of mass-produced products. However, when one or several small products are joined, there is a problem that the work of creating an NC program for each product becomes very complicated. Arise. Therefore, productivity is low and production costs are high for small quantities. In addition, the NC program set in advance cannot be flexibly adapted to changes in the set state of the materials to be joined to the apparatus, the material lot, and the like, and the joining operation cannot be performed rationally.

  The present invention has been made in view of the above circumstances, and allows the main joining operation to be performed by a simple manual operation without using automatic control according to the NC program. An object of the present invention is to provide a friction stir welding apparatus that can cope with this.

  Note that Patent Document 2 (Japanese Patent Laid-Open No. 2015-182133) discloses that the traveling direction of the tool is manually controlled, but the manual operation means, the method thereof, and the like are not specifically shown. Absent. Patent Document 3 (Japanese Patent Application Laid-Open No. 2001-287054) discloses that the tool is moved by a manual handle, but it is only moved in a linear direction, and the moving direction can be freely set corresponding to various joining shapes. It is not something that can be changed.

The friction stir welding apparatus according to the present invention is
In a friction stir welding apparatus that presses a rotating tool against a material to be welded and relatively moves the rotating tool or the material to be welded to friction stir weld the material to be joined.
Driving means for moving the rotating tool or the material to be joined;
A handle lever that is tilted by manual operation and manually operates the movement of the rotary tool or the material to be joined,
Control means for controlling the operation of the driving means so as to move the rotary tool or the material to be joined in conjunction with the manual operation of the handle lever according to the operation amount based on the direction in which the handle lever is tilted and the inclination angle. .

Accordingly, the handle lever is tilted in the direction in which the rotary tool or the material to be joined is desired to move, and the moving speed can be increased or decreased depending on the angle at which the handle lever is tilted (the speed increases as the handle lever is tilted to the horizontal side). The friction stir welding operation can be performed according to the will of the operator by a simple manual operation that simply tilts the handle lever. Therefore, a complicated operation of creating and setting an NC program for moving the rotating tool or the material to be joined becomes unnecessary. In particular, in the joining work of a small amount of products, the joining work can be performed immediately and easily without an NC program, so that the productivity can be improved and the production cost can be reduced.
In addition, since the joining work can be performed according to the will of the operator, the joining work can be appropriately performed while confirming the variation of the set state of the materials to be joined, and it can flexibly handle various joining shapes. Joining work can be performed. Therefore, the versatility of the apparatus is further increased.

  As described above, according to the friction stir welding apparatus according to the present invention, the main joining operation can be performed by a simple manual operation without using automatic control according to the NC program. It can correspond to.

It is a top view which shows the friction stir welding apparatus of embodiment. It is a front view which shows the friction stir welding apparatus of embodiment. It is a side view which shows the apparatus after friction stirring kneading of embodiment. It is a schematic diagram which shows the manual operation example (example 1) of joining investigation. It is a schematic diagram which shows the manual operation example (example 2) of joining investigation. It is a top view which shows the example which provided the pre-heating mechanism ahead of the advancing direction of the rotary tool. It is a top view which shows the example which displays a pointer ahead of the advancing direction of a rotation tool.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
The friction stir welding apparatus 1 according to the embodiment is configured so that a part of the joining operation can be performed manually. As shown in FIGS. 1 to 3, as a main configuration of the friction stir welding apparatus 1, a rotary tool 3 for friction stir welding a workpiece 2, a work set base 4 for placing the workpiece 2, and a work set A handle lever 5 for manually operating the movement of the base 4 and a control unit (not shown) for controlling the operation so as to move the work set base 4 in conjunction with the manual operation of the handle lever 5 are provided. In the present embodiment, the manual joining operation is performed by holding the rotary tool 3 in a fixed position and moving the material to be joined 2 side. You may move the side. Further, in the friction stir welding apparatus 1 according to the present embodiment, the friction stir welding of the butted portions 21 where the ends of the two workpieces 2 are butted together is performed. Friction stir welding can also be performed on the overlapping portion where the end portions are overlapped. As the material 2 to be joined, a metal plate such as aluminum or iron can be used, and a plastic plate or the like can be used. In the present specification, the relationship among XYθ, front and rear, left and right directions, and positions is shown in FIG.

  As the rotary tool 3, a bobbin type tool including an upper shoulder portion 31 and a lower shoulder portion 32 that are in contact with the front and back surfaces of the material to be joined 2 is used. The upper shoulder portion 31 is formed in a columnar shape, and a probe 33 that enters the material to be bonded 2 is formed at the center of the contact surface that contacts the surface of the material to be bonded 2. Are integrally formed. The lower shoulder portion 32 is formed in a cylindrical shape, and the stirring shaft 34 of the upper shoulder portion 31 is inserted into the through hole 35 in the central portion from the contact surface side that contacts the back surface of the material 2 to be joined. 36 is formed as an overhang. Separate spindles (not shown) are connected to the stirring shaft 34 of the upper shoulder portion 31 and the flange 36 of the lower shoulder portion 32, and the upper shoulder portion 31 and the lower shoulder portion 32 are made independent by rotational driving of each spindle. And can be rotated. Therefore, in this bobbin type tool, the upper shoulder portion 31 and the lower shoulder portion 32 can be rotated in the same direction or in the reverse direction. The rotary tool 3 and the spindle are provided in the holding mechanism. Therefore, the rotary tool 3 can be held at a predetermined position by stopping the holding mechanism, and the driving mechanism can be provided in the holding mechanism and moved. The bobbin-type tool is not limited to the above-described configuration, and various types of configurations such as a configuration in which the upper shoulder portion 31 and the lower shoulder portion 32 are integrally formed on the stirring shaft 34 can be used. Further, the rotary tool 3 is not limited to the bobbin type tool, and a tool having a columnar shoulder portion that is brought into contact only with the surface side of the material 2 to be joined can also be used. As the material of the rotary tool 3, various known metal materials, cemented carbides, ceramic materials, and the like can be used. For example, in consideration of mechanical characteristics and workability, it is preferable to use tool steel such as SKD. .

  The work set base 4 is formed in a disk shape, and is provided with a central hole 41 serving as a joining work space for the materials to be joined 2. A pair of left and right work set portions 6 are provided so as to project from the central hole 41 at the left and right positions of the work set base 4 (positions on both ends in the X-axis direction in FIG. 1).

  The work setting unit 6 includes a mounting table 61 on which the material to be bonded 2 is mounted, and a fixing claw unit 62 that holds the material to be bonded 2 on the mounting table 61 while being held on the mounting table 61 with a bolt B <b> 1. And a height adjusting member 63 that is fixed on the mounting table 61 with a bolt B2 and adjusts the height position of the fixing claw 62 in accordance with the thickness of the material 2 to be joined. The work set unit 6 is attached with the mounting table 61 fixed to the work set base 4 with bolts B2. Each workpiece 2 held by the left and right work set parts 6 by the fixed claw parts 62 is disposed on the center hole 41 of the work set base 4 with the joining end parts being butted. The height adjusting member 63 can be constituted by a single block body, a laminate of a plurality of plate members, or the like. When the height adjusting member 63 is formed of a laminate, the height can be easily adjusted by the number of stacked plate members. Heat insulating materials 64 and 65 are provided on the facing surface of the mounting table 61 and the fixed claw portion 62, that is, the holding surface of the material to be bonded 2 so that heat is not transmitted from the material to be bonded 2. As the heat insulating materials 64 and 65, it is preferable to use a hard material having heat insulating properties such as hard resin or ceramic and capable of stably fixing the material 2 to be joined.

  The work set base 4 is provided with a drive device (not shown) such as a servo motor. The drive device includes an X-axis drive unit that moves the work set base 4 in the X-axis direction, and a Y-axis drive unit that moves the work set base 4 in the Y-axis direction. The X-axis drive unit and the Y-axis drive unit are attached to the work set base 4 via a guide unit (not shown). This guide portion guides the work set base 4 to move in the X-axis direction and the Y-axis direction, and guides the work set base 4 to rotate in the XY plane by θ rotation (clockwise or counterclockwise rotation). And a rotating guide mechanism.

  The handle lever 5 is composed of a joystick lever or the like and serves as a control stick for manually operating the movement of the material 2 to be joined. The handle lever 5 is provided on a left and right end portion of a horizontally long plate-like operation table 51 and has a pair of left and right. The handle lever 5 and the operation table 51 serve as a manual operation unit 50 in the friction stir welding apparatus 1. The operation table 51 is attached to the upper surface of the front end portion of the work set base 4.

  The handle lever 5 is urged and supported by urging means (not shown) so as to stand upright with respect to the operation table 51 when not being operated. Can be tilted in four directions which are XY directions. That is, the handle lever 5 is perpendicular to the X-axis direction (left-right direction) in which the two workpieces 2 face each other, or in the direction perpendicular to the opposing direction of the two workpieces 2. It can be tilted so as to be tilted in any direction of the axial direction (front-rear direction). When the hand is released from the tilted handle lever 5, the handle lever 5 moves back so as to stand up to the vertical position which is the neutral position by the biasing force of the biasing means.

  A handle load sensor 52 is provided on the lower surface of the central portion of the operation console 51. The handle load sensor 52 is provided between the operation unit 50 and the work set base 4 and detects the direction and magnitude of the load based on the tilt of the handle lever 5. That is, when the handle lever 5 is manually operated, the handle load sensor 52 detects the direction and magnitude of the load corresponding to the tilt of the handle lever 5 and uses the detected value as the operation amount of the handle lever 5 by manual operation. Output to the control unit. For example, when the handle lever 5 is tilted at a predetermined angle in the X-axis direction, the handle load sensor 52 detects a load corresponding to the angle at which the handle lever 5 is tilted in the X-axis direction where the handle lever 5 is tilted. . When the handle lever 5 is tilted to a predetermined angle in the Y-axis direction, the handle load sensor 52 detects a load corresponding to the angle at which the handle lever 5 is tilted in the Y-axis direction where the handle lever 5 is tilted. .

  Here, the magnitude of the load detected by the handle load sensor 52 is detected as a larger load value as the inclination angle when the handle lever 5 is tilted from the vertical position to the horizontal side increases. When both the left and right handle levers 5 are tilted in the same axial direction of X or Y, the handle load sensor 52 corresponds to the angle in which each handle lever 5 is tilted in the axial direction in which each handle lever 5 is tilted. It is detected as the total value of the load. For example, when both the left and right handle levers 5 are tilted to the X axis direction side, a predetermined amount of load detected by the handle load sensor 52 is when the handle lever 5 is tilted to the X axis direction plus side (for example, the right side). In the case of a positive load value, when it is tilted to the X axis direction minus side (for example, the left side), the magnitude of the load as a minus load value is detected. When both handle levers 5 are tilted to the Y-axis direction side, they are similarly detected as a plus side (for example, the rear side) and a minus side (for example, the front side) in the Y-axis direction. On the other hand, when the left and right handle levers 5 are tilted to different X or Y axial directions, the handle load sensor 52 detects the direction and magnitude of each load for each handle lever 5. For example, when one handle lever 5 is tilted in the X-axis direction and the other handle lever 5 is tilted in the Y-axis direction, a predetermined amount of load detected by the handle load sensor 52 is X A load having a magnitude corresponding to the tilted angle in the axial direction and a load having a magnitude corresponding to the tilted angle in the Y-axis direction where the other handle lever 5 is tilted are detected.

  The control unit controls the operation so that the work set base 4 moves by driving the drive device by outputting a drive command signal to the drive device corresponding to the axial direction and the magnitude of the load detected by the handle load sensor 52. To do. As a result, the workpiece 2 held by the work set unit 6 on the work set base 4 moves corresponding to the manual operation of the handle lever 5 by the operator. Therefore, when the workpiece 2 is moved in the X axis direction (left and right direction) by manual operation of the handle lever 5, both the left and right handle levers 5 are tilted in the X axis direction, or one handle lever 5 is While maintaining the neutral vertical position, only the other handle lever 5 is tilted in the X-axis direction. As a result, the X-axis drive unit of the drive device is driven and the work set base 4 moves in the X-axis direction, whereby the workpiece 2 moves in the X-axis direction. When the workpiece 2 is moved in the Y-axis direction (front-rear direction), both the left and right handle levers 5 are tilted in the Y-axis direction, or one handle lever 5 remains in the neutral vertical position and the other handle Only the lever 5 is tilted in the Y-axis direction. As a result, the Y-axis drive part of the drive device is driven and the work set base 4 moves in the Y-axis direction, so that the workpiece 2 moves in the Y-axis direction. Further, when the material to be joined 2 is rotated by θ on the XY plane, the right and left handle levers 5 are tilted such that the right handle lever 5 is tilted in the X-axis direction and the left handle lever 5 is tilted in the Y-axis direction. Tilt in different axial directions. As a result, the X-axis drive unit and the Y-axis drive unit are driven to rotate the work set base 4 by θ corresponding to the inclination of each handle lever 5 in the axial direction, so that the workpiece 2 is Rotate θ. The moving speed of the work set base 4, that is, the moving speed of the workpiece 2 is adjusted by the inclination angle of the handle lever 5 (the magnitude of the load detected by the handle load sensor 52).

  As described above, the movement speed of the material to be joined 2 is determined by manual operation of the handle lever 5 by the operator. However, the load caused by the contact between the rotary tool 3 and the material to be joined 2 is applied via the handle lever 5 at the time of joining. It is not transmitted to the person. Therefore, depending on the joining situation such as the degree of softening of the material 2 to be joined, the rotating tool 3 may be damaged when the load on the rotating tool 3 becomes excessive.

  Therefore, as a countermeasure, in this embodiment, a work load sensor 66 is provided on the lower surface of each work set unit 6. The workpiece load sensor 66 is provided between the workpiece set unit 6 and the workpiece set base 4 and detects the magnitude of the load applied to the workpiece 2. That is, the workpiece load sensor 66 detects the magnitude of the load received by the workpiece 2 when the rotary tool 3 and the workpiece 2 move in contact with each other during the manual operation. The value is output to the control unit. The control unit sets so that the moving speed of the workpiece 2 by manual operation is decreased as the load detected by the work load sensor 66 increases.

  In this way, the work load sensor 66 monitors the joining state of the workpiece 2 and the moving speed based on the operator's operation of the handle lever 5 is adjusted according to the joining state. That is, the moving speed is set to be slower as the load applied to the material to be joined 2 increases. Therefore, it is possible to prevent the rotating tool 3 from being damaged and causing the bonding failure due to a large load applied to the rotating tool 3. Moreover, an operator's judgment about the moving speed of the to-be-joined material 2 can be reduced, and manual operation can be performed easily.

  In the above example, the guide unit provided between the work set base 4 and the drive device includes an XY guide mechanism and a rotation guide mechanism, and the work set base 4 is moved in the XY axis direction and θ rotation. However, it may be configured to have only the XY guide mechanism, and the work set base 4 may be capable of moving in the oblique direction between the XY axis direction and the XY axis. That is, when the left and right handle levers 5 are tilted in different axial directions, the work set base 4 moves in an oblique direction in which the X-axis direction component and the Y-axis direction component are combined while maintaining the same posture. Alternatively, only one handle lever 5 may be provided so that the work set base 4 can be moved only in the XY axis directions.

Next, an example of manual operation for joining work will be described.
In the following example, it is assumed that the abutting portion 21 where the two workpieces 2 are abutted is joined by friction stir welding along a joining line bent in a “<” shape. In this case, although the rotary tool 3 can be moved up and down, it does not move back and forth and right and left but is fixed at a predetermined position, and the work set base 4 to which the workpiece 2 is attached is moved by manual operation of the handle lever 5. Suppose. The movement of the work set base 4 will be described in the case where movement in the XY axes and θ rotation are possible (example 1), and the case where movement in the XY axes and movement in an oblique direction are possible (example 2). That is, as the guide portion interposed between the work set base 4 and the drive device, in the case of Example 1, the XY axis guide mechanism and the rotation guide mechanism are provided, and in the case of Example 2, only the XY guide mechanism is provided. is there.

(Example 1)
Referring to FIG. 4, first, in the material to be joined 2, one linear portion 21 a arranged closer to the rotary tool 3 in the “<”-shaped joining line is oriented straight in the Y-axis direction. The handle lever 5 is tilted in the X-axis direction and the other handle lever 5 is tilted in the Y-axis direction, and the work set base 4 is rotated counterclockwise by θ (FIGS. 4A and 4B).
One of the straight portions 21 a of the “<”-shaped joint line is oriented straight in the Y-axis direction, and both handle levers 5 are moved in the X-axis direction until the end of the one straight portion 21 a faces the rotary tool 3. And the work set base 4 is moved in the X-axis direction (FIG. 4B).
Then, both handle levers 5 are tilted to the plus side (rear side of the apparatus) in the Y-axis direction, the work set base 4 is moved in the Y-axis direction, and “ Friction stir welding is performed on one straight line portion 21a of the U-shaped bonding line (FIGS. 4C and 4D).
Subsequently, the other handle lever 5 is tilted in the X-axis direction and the one handle lever 5 is moved so that the other straight line portion 21 b of the “<”-shaped joint line in the material to be joined 2 faces straight in the Y-axis direction. Tilt in the Y-axis direction and rotate the work set base 4 by θ in the clockwise direction (FIG. 4E).
Then, both handle levers 5 are tilted to the plus side in the Y-axis direction, the work set base 4 is moved in the Y-axis direction, and the other of the “<”-shaped joining lines in the workpiece 2 is rotated by the rotary tool 3. The linear portion 21b is also friction stir welded (FIG. 4 (f)). This completes the joining operation.

(Example 2)
Referring to FIG. 5, first, in the material to be joined 2, until the end of one straight line portion 21 a arranged closer to the rotary tool 3 in the “<”-shaped joint line faces the rotary tool 3. Then, both handle levers 5 are tilted in the same direction side in the X-axis direction and the Y-axis direction, and the work set base 4 is moved in the X-axis direction and the Y-axis direction (FIGS. 5A and 5B).
Then, one handle lever 5 is tilted in the X-axis direction and the other handle lever so that one linear portion 21a of the "<"-shaped joining line in the workpiece 2 moves along the rotary tool 3. 5 is tilted in the Y-axis direction, the work set base 4 is moved in an oblique direction, and the rotary tool 3 friction stir welds one straight portion 21a of the “<”-shaped joint line in the workpiece 2 ( FIG. 5 (c)).
Subsequently, the other handle lever 5 is tilted in the X-axis direction so that the other straight line portion 21b of the "<"-shaped joining line in the workpiece 2 moves along the rotary tool 3, and one handle The lever 5 is tilted in the Y-axis direction, the work set base 4 is moved in the oblique direction, and the other straight portion 21 b of the “<”-shaped joint line in the workpiece 2 is friction stir welded by the rotary tool 3. (FIG. 5D). This completes the joining operation.

  As described above, according to the friction stir welding apparatus 1 according to the embodiment, the handle lever 5 is tilted in the direction in which the workpiece 2 is desired to be moved, and the moving speed is the angle at which the handle lever 5 is tilted (the speed increases as the lever is tilted horizontally). Can be increased or decreased. The friction stir welding operation can be performed according to the will of the operator by a simple manual operation by simply tilting the handle lever 5. Therefore, a complicated operation of creating and setting an NC program for moving the rotary tool 3 or the material to be joined 2 is not required. In particular, in the joining work of a small amount of products, the joining work can be performed immediately and easily without an NC program, so that the productivity can be improved and the production cost can be reduced. In addition, since the joining work can be performed according to the will of the operator, the joining work can be appropriately performed while checking the variation of the set state of the material 2 to be joined, and it can flexibly cope with various joining shapes. Can be joined. Therefore, the versatility of the apparatus is further increased.

  In addition, the work set unit 6 is provided with heat insulating materials 64 and 65 on the holding surface of the workpiece 2 in the mounting table 61 and the fixed claw portion 62 so that heat is not transmitted from the workpiece 2 during friction stir welding. The material to be joined 2 is held. Thereby, the frictional heat by the rotary tool 3 can be prevented from escaping from the material to be joined 2, and heat can be efficiently stored in the joint portion. Therefore, the bonding quality can be improved. In addition, since heat transfer to the work load sensor 66 and the handle load sensor 52 is also blocked, it is possible to prevent malfunctions due to the thermal effects of these sensors 66 and 52. Furthermore, since heat transfer to the handle lever 5 is also prevented, the operator can also prevent the handle lever 5 from getting hot and feeling uncomfortable.

In addition, this invention is not limited to the said embodiment, A change can be suitably given within a claim.
For example, the friction stir welding apparatus 1 may include a movement restricting unit that disables movement in a specific axial direction in the driving device. As the movement restricting means, for example, an X-axis or Y-axis drive command is issued from the control unit so that the operator does not drive the X-axis drive unit or the Y-axis drive unit by pressing a button provided on the operation unit 50. A configuration in which the signal is not output, the X-axis or Y-axis drive command signal from the control unit is interrupted, or the X-axis drive unit or the Y-axis drive unit is configured not to accept the drive command signal. can do. According to this movement restricting means, for example, when the movement position of the material to be joined 2 in the X-axis direction is determined, the movement restricting means prohibits movement in the X-axis direction and allows only movement in the Y-axis direction. . As a result, the X-axis position of the material to be bonded 2 is fixed, so that the movement of the material to be bonded 2 in the Y-axis direction can be stabilized by manual operation of the handle lever 5 without shifting in the X-axis direction. It can be carried out. Accordingly, during manual operation, the workpiece 2 can be moved so that the rotary tool 3 is correctly positioned along the joining position of the workpiece 2. Therefore, since the movement of the material to be joined 2 is stabilized, the manual operation can be performed more easily, and the joining quality can be improved.

  Further, as shown in FIG. 6, the friction stir welding apparatus 1 is provided with a preheating mechanism 7 for preheating the material to be joined 2 at the front of the rotating tool 3 in the traveling direction, that is, at a position to be joined by the rotating tool 3. Also good. As the preheating mechanism 7, for example, various heating mechanisms such as energization heating, laser irradiation heating, high frequency heating, micro arc heating, hot air heating, and frictional heat heating can be used. The preheating mechanism 7 is preferably incorporated in the friction stir welding apparatus 1, but may be provided separately from the friction stir welding apparatus 1. It is preferable to raise the temperature of the material to be joined 2 to such an extent that the deformation resistance is sufficiently lowered by the preheating mechanism 7. According to the preheating mechanism 7, since the joining portion of the material to be joined 2 is softened by preheating, the approach direction of the rotary tool 3 can be induced. Therefore, manual operation can be performed more easily, and joining quality can be improved.

  Further, as shown in FIG. 7, the friction stir welding apparatus 1 may make the pointer 8 indicating the movement destination of the rotary tool 3 present on the workpiece 2 in the traveling direction of the rotary tool 3. The pointer 8 can be, for example, an image of laser light irradiated in a shape such as a point or an arrow by the laser pointer 8, and the preheating mechanism 7 may be configured as the pointer 8. Pointer forming means such as a laser pointer is preferably attached to the holding mechanism of the rotary tool 3 to fix the positional relationship with the rotary tool 3, but may be provided separately from the friction stir welding apparatus 1. According to this pointer 8, the operator can confirm at a glance the movement destination of the rotary tool 3, and can intuitively know the position of the rotary tool 3 to be moved. Therefore, the rotary tool 3 can be easily moved so as to be directed to the correct joining position of the workpiece 2 by manual operation. Therefore, manual operation can be performed more easily, and joining quality can be improved.

DESCRIPTION OF SYMBOLS 1 Friction stir welding apparatus 2 To-be-joined material 3 Rotating tool 4 Work set base 5 Handle lever 6 Work set part 7 Preheating mechanism 8 Pointer 21 Butting part 21a One linear part 21b The other linear part 31 Upper shoulder part 32 Lower shoulder part 33 Probe 34 Stirring shaft 35 Through hole 36 Flange 41 Center hole 50 Operation part 51 Operation base 52 Handle load sensor 61 Mounting base 62 Fixed claw part 63 Height adjusting member 64, 65 Heat insulation material 66 Work load sensor B1 Bolt B2 Bolt

Claims (6)

In a friction stir welding apparatus that presses a rotating tool against a material to be welded and relatively moves the rotating tool or the material to be welded to friction stir weld the material to be joined.
Driving means for moving the rotating tool or the material to be joined;
A handle lever that is tilted by manual operation and manually operates the movement of the rotary tool or the material to be joined,
Friction stir welding comprising control means for controlling the drive means so as to move the rotating tool or the material to be joined in conjunction with the manual operation of the handle lever according to the operation amount based on the direction in which the handle lever is tilted and the tilt angle apparatus. In the friction stir welding apparatus according to claim 1,
A work set base moved by a driving means;
A work set base provided on a work set base and holding a material to be joined;
An operation unit provided on the work set base and provided with the handle lever;
A workpiece load sensor that is provided between the workpiece set base and the workpiece set unit and detects a load applied to the material to be joined by contact with the rotary tool;
A handle load sensor is provided between the work set base and the operation unit and detects the direction and magnitude of the load based on the tilt of the handle lever.
The control means controls the operation of the driving means according to the moving direction and moving speed of the rotating tool or the material to be joined, which corresponds to the operation amount according to the direction and magnitude of the load detected by the handle load sensor. A friction stir welding apparatus configured to limit the moving speed in accordance with the load detected in step (b). In the friction stir welding apparatus according to claim 2,
The work set unit is a friction stir welding apparatus configured to attach a material to be bonded with a heat insulating material interposed so that heat is not transmitted from the material to be bonded. In the friction stir welding apparatus according to any one of claims 1 to 3,
The drive means is configured to be movable in two XY directions or two XY axes and a three-axis direction of θ rotation.
Also, a friction stir welding apparatus comprising movement restriction means for disabling movement in a specific axial direction in the drive means. In the friction stir welding apparatus according to any one of claims 1 to 4,
A friction stir welding apparatus in which a preheating mechanism for preheating a material to be joined is provided in front of the rotating tool in the traveling direction. In the friction stir welding apparatus according to any one of claims 1 to 5,
A friction stir welding apparatus in which a pointer indicating a movement destination of a rotary tool is present in the forward direction of the rotary tool.

Images