JP4301880B2 - Friction stir welding method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a friction stir welding method and a friction stir welding apparatus, and in particular, a clamp device for pressing and holding a workpiece (workpiece) in which a plurality of members overlap each other, and the workpiece along the surface shape at the joint. In particular, the present invention relates to a pressing jig that holds a uniform pressing force, and a friction stir welding method using these clamping devices and pressing jigs.
[0002]
[Prior art]
Recently, in a fuel cell system, a compressed air unit, a fluid control device, etc., logic plates (two-dimensional integrated piping) in which piping and wiring are integrated into a unit that is easy to assemble and transport are frequently used. . The two-dimensional integrated piping is obtained by processing and integrating (joining) a plurality of plates with grooves and communication holes serving as fluid flow paths and wiring routes. Friction stir welding is used as the joining method. ing.
[0003]
The friction stir welding method is a known technique disclosed in Japanese Patent No. 2794233. A tool made of a material harder than the workpiece material is inserted into the workpiece joining portion, and the tool and the workpiece are moved by rotating the tool while rotating the tool. This is a method of joining by frictional heat generated between the two. Specifically, the work is softened by frictional heat in the vicinity of the contact part between the tool and the work, the softened part is stirred by the tool, and further, the softened stirring part is plastically flowed as the tool moves and then solidifies by cooling. Join the workpieces.
[0004]
[Patent Document 1]
Japanese Patent No. 2792233
[0005]
7 to 9 are diagrams showing an example of workpiece integration using the friction stir welding method, that is, an example of joining. In FIG. 7, a workpiece 50 is a workpiece in which two plates 51 and 53 overlap each other. A channel groove 52 is formed in the plate 51 in advance, and a communication hole 54 communicating with the groove 52 is formed in the plate 53. Has been processed in advance. In joining the workpieces 50, first, the plate 53 is placed on the plate 51 and set on a bed (not shown) of the friction stir welding apparatus. Thereafter, the tip of the tool 56 of the friction stir welding apparatus is inserted into the plate 53 at a suitable position separated from the center in the width direction of the groove 52 by a suitable distance f, for example, at the friction stir welding start point 55 shown in FIG. Next, the tool 56 is rotated in the direction of the arrow 58 while pressing the tool 56 in the workpiece direction indicated by the arrow 57, and the arrow 59 shown in FIG. The tool 56 is moved in the direction of. As the tool 56 moves, a joint 60 is formed as shown by cross diagonal lines in FIGS. 7 to 9, and the workpiece 50 (plate 51 and plate 53) is joined.
[0006]
As described above, the friction stir welding method is a method of joining the workpiece 50 by frictional heat generated between the tool 56 and the workpiece 50 (plate 51 and plate 53). In order to prevent this, a strong clamping device is required to fix and hold the plate 51 and the plate 53 on the bed.
[0007]
If the holding force of the clamping device is insufficient, the two plates 51 and 53 are displaced from each other, or the upper plate 53 is lifted, resulting in poor bonding.
[0008]
10 to 12 are views showing a conventional clamping device 61. 10 to 12, the clamp device 61 is a seat that can move along a guide groove 63 formed on the upper surface of the bed 62 so as to fix the peripheral edge of the workpiece 50 on the bed 62 of the friction stir welding apparatus. 64, an L-shaped clamp 65, and a nut 66 that is coupled to the screw 64a of the seat 64 that passes through the clamp 65 and protrudes to the upper surface thereof. The upper opening of the guide groove 63 is narrower than the inside of the groove so that the receiving seat 64 does not come out, and the receiving seat 64 is inserted into the guide groove 63 from its end opening. Since the seat 64 is movable along the guide groove 63 of the bed 62, the clamp 65 is also movable along the guide groove 63. The tip of the screw 64 a and the nut 66 are located on the upper surface of the clamp 65.
[0009]
When holding the work 50 on the bed 62, first, the plate 51 and the plate 53 constituting the work 50 are placed on the bed 62 so as to overlap each other. A groove 52 having an appropriate cross-sectional area is processed in the lower plate 51, and a communication hole 54 communicating with the groove 52 is provided at a predetermined position of the upper plate 53. Then, the clamp 65 is disposed at an appropriate position along the guide groove 63 and the nut 66 is tightened to press and hold the peripheral edge of the workpiece 50 against the bed 62. At this time, the upper part of the clamp 65 protrudes above the workpiece 50. Further, if necessary, the work piece 50 is fixed by interposing a presser foot 67 between the clamp 65 and the upper plate 53, thereby preventing the plate 53 from being lifted and fixing the work piece 50 more firmly. Done.
[0010]
[Problems to be solved by the invention]
However, in the conventional clamping device 61, a large space is required for clamping at the periphery of the work 50, and when the friction stir welding is to be performed near the end of the work 50, the clamp 65 positioned on the work 50. And the presser foot 67 may be in the way, preventing the joining operation from being performed. For example, as shown in FIG. 10, a part of the friction stir welding portion 60 marked with an X in the plate 53 is below the clamp 65 at some positions 68, so that the joining operation cannot be performed continuously. . In such a case, it is necessary to interrupt the temporary joining operation and reset the clamp 65 to another position, so that the work efficiency is significantly reduced.
[0011]
To eliminate the need for reworking the set of the clamp 65 and prioritize improving the efficiency of the joining work, there is a method of enlarging the workpiece 50 in advance to ensure a wide peripheral portion. Was wasted. Furthermore, in some cases, it becomes necessary to process the wafer to a predetermined size after joining, which further reduces cost.
[0012]
An object of the present invention is to eliminate the above problems, improve the efficiency of the friction stir welding operation, and prevent waste of material costs.
[0013]
[Means for Solving the Problems]
1st invention is the friction stir welding method which solves the said subject, In the friction stir welding method which integrates the workpiece | work with which several members overlap by friction stir welding, the side of the side which performs the friction stir welding of the said workpiece | work A clamp having a contact surface formed at substantially the same angle as the inclined surface, the workpiece is pressed and held by the clamp with the contact surface being brought into contact with the inclined surface, and friction stirring is performed. It is characterized by performing bonding.
[0015]
First 2 The present invention is still another friction stir welding method for solving the above-described problem, and in the friction stir welding method in which a workpiece in which a plurality of members overlap is integrated by friction stir welding, the workpiece is subjected to friction stir welding. An inclined surface is formed on the side surface, and a clamp having an abutting surface formed at substantially the same angle as the inclined surface, and a pressing means capable of rotating on the workpiece provided around a tool, are used. Friction stir welding is performed by pressing and holding the workpiece with the clamp while abutting the contact surface and pressing the workpiece with the pressing means.
[0016]
First 3 Invention 2 In the present invention, the friction stir welding method is characterized in that an insertion depth of the tool into the workpiece is adjusted by an adjusting means for adjusting a distance along the tool axis direction between the tool and the pressing means.
[0017]
First 4 The present invention is a friction stir welding apparatus that solves the above-described problem, and includes a clamp device that presses and holds a workpiece in which a plurality of members overlap each other on a bed, and the workpiece pressed and held by the clamp device is integrated by friction stir welding. In the friction stir welding apparatus to be realized, a contact surface of the clamp constituting the clamp apparatus with the workpiece is inclined.
[0018]
First 5 Invention 4 In the invention, the clamp may be moved back and forth in a direction along a surface on which the workpiece is subjected to friction stir welding.
[0019]
First 6 Invention 4 In the present invention, a guide groove provided in the bed, a seat disposed in the guide groove so as to be movable along the guide groove, a bolt with a hole coupled to the screw hole of the seat, and the clamp are penetrated. A friction stir welding apparatus comprising: a mounting hole for the bolt with a hole provided in the above and a counterbore hole for a head portion of the bolt with the hole provided in the mounting hole.
[0020]
First 7 Invention 6 In the invention, the counterbore is a depth at which the head of the bolt with the hole sinks, and is a friction stir welding apparatus according to the invention.
[0023]
First 8 The invention In a friction stir welding apparatus that integrates a workpiece in which a plurality of members overlap with each other by friction stir welding, the friction stir welding device includes a plurality of rotating bodies and includes a pressing means that is rotatable on the workpiece around the tool. A plurality of cylinders provided around the tool and a set of fluid pressure sources connected to the plurality of cylinders, and pressing the rotating body of the pressing means with the plurality of cylinders. The friction stir welding apparatus is characterized.
[0024]
First 9 The invention In a friction stir welding apparatus that integrates a workpiece in which a plurality of members overlap with each other by friction stir welding, a pressing means that is rotatable on the workpiece is provided around the tool. A friction stir welding apparatus comprising adjusting means for adjusting a distance along the tool axis direction between the pressing means and the tool.
[0025]
First 10 Invention 9 The friction stir welding apparatus according to the invention is characterized in that the adjusting means is a screw mechanism.
[0026]
First 11 The invention is yet another friction stir welding apparatus that solves the above-described problem, and includes a clamp device that presses and holds a workpiece in which a plurality of members overlap each other on a bed, and friction stir welding the workpiece that is pressed and held by the clamp device. In the friction stir welding apparatus integrated by the above, the contact surface of the clamp constituting the clamp apparatus with the work is inclined, and a pressing means that is rotatable on the work is provided around the tool. An adjusting means for adjusting a distance along the tool axis direction between the pressing means and the tool is provided.
[0027]
First 12 Invention 5 No. from invention 7 A method of integrating a workpiece in which a plurality of members are overlapped by any one of the friction stir welding apparatuses according to the invention, wherein the workpiece is inclined at substantially the same angle as the contact surface of the clamp on the side surface on which friction stir welding is performed. A surface is formed, the contact surface is applied to the inclined surface, and the workpiece is pressed and held by the clamp to perform friction stir welding.
[0028]
First 13 Invention 8 No. from invention 10 The invention is a method of integrating a workpiece in which a plurality of members are overlapped by any one of the friction stir welding apparatuses, wherein the workpiece is pressed by the pressing means to perform friction stir welding.
[0029]
First 14 Invention 9 Invention or No. 10 A method of integrating a workpiece in which a plurality of members overlap with each other by the friction stir welding apparatus according to the invention, wherein the depth of insertion of the tool into the workpiece is adjusted by the adjusting means.
[0030]
First 15 Invention 11 A method of integrating a workpiece in which a plurality of members overlap with each other by a friction stir welding apparatus according to the invention, wherein an inclined surface is formed at a substantially same angle as a contact surface of the clamp on a side surface of the workpiece on which friction stir welding is performed. Forming, applying the holding surface to the inclined surface, pressing and holding the workpiece with the clamp, pressing the workpiece with the pressing means, and adjusting the depth of insertion of the tool into the workpiece by the adjusting means Then, friction stir welding is performed.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0032]
[First embodiment]
A friction stir welding method and apparatus according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a friction stir welding apparatus, in particular, its clamping device, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG.
[0033]
In FIG. 1 and FIG. 2, a work 5 is constituted by two plates 1 and 3, and the work 5 is set on a bed 62 of a friction stir welding apparatus (not shown), and the work 5 has a plurality of peripheral portions. The state fixed to the bed 62 with the clamp apparatus 7 is shown. The lower plate 1 has grooves 2 of appropriate width and depth machined in appropriate lengths and directions, and the upper plate 3 has appropriate positions corresponding to the grooves 2 of the lower plate 1. A communication hole 4 is provided in the front.
[0034]
As shown in FIG. 3, an inclined surface 6 is formed on the peripheral side surface on the side where the friction stir welding of the workpiece 5 is performed. In other words, the peripheral portion of the upper plate 3 is chamfered at an appropriate angle toward the surface in contact with the lower plate 1, thereby providing the inclined surface 6.
[0035]
The clamp device 7 has an L-shaped clamp 8 and a mounting bracket (seat) 10 provided so as to be movable along the guide groove 9 of the bed 62 so as to fix the peripheral edge of the workpiece 5 on the bed 62. And a bolt 11 for fixing the clamp 8 to the bed 62. The guide groove 9 is processed on the upper surface of the bed 62. A bolt with a hole is used for the bolt 11.
[0036]
A mounting hole 12 for passing the holed bolt 11 passes through the clamp 8, and a hole is formed on the upper surface of the mounting hole 12 when the holed bolt 11 is inserted through the mounting hole 12. A counterbore 13 is machined so that the head of the attached bolt 11 does not protrude on the surface of the clamp 8. That is, the counterbore 13 is a depth at which the head of the bolt 11 with a hole sinks.
[0037]
In the clamp 8, the contact surface 14 that contacts the inclined surface 6 of the peripheral portion of the workpiece 5 (peripheral portion of the upper plate 3) is substantially the same as the inclined surface 6 so that the inclined surface 6 is in uniform contact. It is formed at a predetermined angle.
[0038]
The upper opening of the guide groove 9 is narrower than the inside of the groove so that the seat 10 does not come out, and the seat 10 is inserted into the guide groove 9 from its end opening. Since the seat 10 can move along the guide groove 9 of the bed 62, the clamp 8 can also move along the guide groove 9. Further, the seat 10 is movable in the width direction of the guide groove 9, and therefore the clamp 8 is also movable in the width direction of the guide groove 9.
[0039]
Therefore, the clamp 8 can move back and forth in a direction along the surface on which the workpiece 5 is subjected to friction stir welding.
[0040]
The assembly of the clamp device 7 is performed by appropriately arranging a plurality of sets of clamp devices 7 on the peripheral edge of the workpiece 5. Specifically, the inclined contact surface 14 of the clamp 8 is brought into contact with the inclined surface 6 of the workpiece 5, and the bolt 8 with a hole is passed through the mounting hole 12 of the clamp 8 and tightened to the receiving seat 10 through the guide groove 9 of the bed 62, Fix it. At this time, the clamp 8 is attached by being adjusted in the front-rear direction so that the upper surface of the clamp 8 does not protrude above the upper surface of the upper plate 3.
[0041]
By appropriately arranging a plurality of clamping devices 7 on the peripheral edge of the workpiece 5, as shown in FIG. 3, the clamping of the workpiece 5 is performed by a clamp 8 having an abutting surface 14 in which the inclined surface 6 is substantially the same. Is pressed and fixed, and a strong holding force can be obtained with a small force. Therefore, the contact length H between the clamp 8 and the upper plate 3 can be made extremely short, and the upper surface of the clamp 8 can be mounted so as not to protrude from the upper surface of the plate 3. Further, the head of the holed bolt 11 is hidden in the counterbore hole 13 and does not protrude from the upper surface of the clamp 8.
[0042]
Accordingly, the groove 2 disposed in the vicinity of the peripheral edge of the work 5 also interferes with a tool holding device (not shown) of the friction stirrer without changing the position of the clamp as in the prior art. The joining operation can be continued without any problems.
[0043]
1 to 3 show a case where the inclined surfaces 6 are machined on the four sides of the workpiece 5 and the clamping device 7 is arranged on the four sides. However, depending on the size and the plate thickness of the workpiece 5, the inclined surfaces are shown. The number of sides of the workpiece 5 to be processed 6 and the number of sides of the workpiece 5 on which the clamping device 7 is disposed may be appropriately reduced.
[0044]
As described above, as a result of using the clamping device 7, the efficiency of the joining work is improved, and a logic plate (two-dimensional integrated piping) by friction stir welding in which the grooves 2 and the communication holes 4 are arranged to the peripheral edge of the workpiece 5 is designed. This makes it possible to realize a compact product and eliminate the waste of material costs. For example, as shown in FIG. 3, it is possible to design and manufacture the friction stir welding portion 15 near the end of the workpiece 5.
[0045]
[Second Embodiment]
Next, a friction stir welding method and apparatus according to a second embodiment of the present invention will be described with reference to FIGS. 4 shows a partial cross-sectional view of the friction stir welding apparatus, in particular, its pressing means (pressing jig), FIG. 5 is a IV-IV cross-sectional view in FIG. 4, and FIG. 6 is a V-V cross-sectional view in FIG. Is shown.
[0046]
The pressing jig 16 is rotatable on the workpiece 5 and is provided around the tool 17 to press the workpiece 5, particularly the upper plate 3, against the bed 62. The pressing jig 16 of this example mainly includes a plurality of balls (rotating bodies) 18, a plurality of cylinders 19 provided around the tool 17, and a set of fluid pressures (not shown) connected to the plurality of cylinders 19. The ball 18 is pressed against the workpiece 5 by the cylinder 19 by the source. Further, the pressing jig 16 of this example is a distance adjusting means for adjusting the distance along the tool axis direction between the pressing jig 16 and the tool 17, in other words, the insertion length of the tool 17 into the lower plate 1. The screw type adjusting flange 20 is provided.
[0047]
Hereinafter, the pressing jig 16 of this example will be described in detail.
[0048]
In FIG. 4, the tool 17 is connected to a rotational drive device of a friction stir welding apparatus (not shown) in the upper part of FIG. 4, and is rotated by this rotational drive device with a predetermined driving force and pressing force. A boss 21 is fixed to the friction stir welding apparatus concentrically with the tool 17. The tool 17 and the boss 21 are integrated vertically and horizontally on the workpiece 5 on the basis of a command from a control device of the friction stir welding apparatus (not shown). It can be moved.
[0049]
As shown in FIG. 5, a plurality of female screws 22 are equally provided on the circumference of the lower end portion of the boss 21, and the attachment 24 is attached to the boss 21 with bolts 23.
[0050]
A female screw 25 is machined inside the lower part of the attachment 24, and a male screw 26 on the upper part of the adjusting flange 20 is engaged with the female screw 25. By rotating the adjusting flange 20 in the left-right direction, the adjusting flange 20 is moved in the vertical direction. It is attached so that the height can be adjusted. After the adjustment, the lock nut 27 is tightened to fix the height.
[0051]
A mounting flange 28 is fixed to the lower end of the adjustment flange 20 by a plurality of bolts 29 provided on the circumference.
[0052]
As shown in FIG. 6, a fluid pressure inlet 30 such as air is provided at the lower end of the mounting flange 28, and a flow path 31 concentric with the tool 17 is machined in communication therewith. A plurality of communication holes 32 are provided equally from the flow path 31 downward.
[0053]
Each communication hole 32 communicates with a cylinder flange 33 fixed to the mounting flange 28, and the cylinder 19 is incorporated in each cylinder flange 33. The cylinder 19 is held by a cover 34, and is set to be extendable and contractable within a predetermined range by fluid pressure. That is, a plurality of cylinders 19 are connected to a set of fluid pressure sources, and a ball 18 is attached to the tip of the cylinder 19 so as to be rotatable in contact with the workpiece 5.
[0054]
The ball 18 is in contact with the plate 3 on the upper side of the work 5 placed on the bed 62, and by adjusting the fluid pressure supplied to the cylinder 19, an appropriate pressure is applied to the work 5 via the ball 18. The work 5 can be moved vertically and horizontally while being pressed while maintaining the pressing force.
[0055]
As described above, the pressing jig 16 uniformly presses the workpiece 5 around the tool 17, and the tool 17 and the boss 21 are not shown in a friction stir welding apparatus (not shown) without changing their relative positions. Based on a command from the control device, the workpiece 5 moves vertically and horizontally along the groove 2.
[0056]
In FIG. 4, the insertion depth of the tip of the tool 17 is normally set to be 1 to 2 mm inserted into the lower plate 1 in addition to the plate thickness of the upper plate 3. Therefore, when the thickness of the plate 3 is changed or the insertion depth of the tool 17 is required to be adjusted due to changes in the material and work conditions of the workpiece 5, the lock nut 27 is first loosened and then adjusted. The flange 20 is rotated rightward or leftward to properly adjust the gap between the bottom surface of the cover 34 and the plate 3, and then the lock nut 27 is tightened to fix the adjustment flange 25.
[0057]
That is, by rotating the adjustment flange 21, the distance in the tool axis direction between the pressing jig 16 and the tool 17, in other words, the insertion depth of the tool 5 with respect to the workpiece 5 can be adjusted.
[0058]
Thereafter, the computer control device of the friction stir welding apparatus (not shown) performs friction stir welding while moving along the groove 2 while keeping the center distance f of the groove 2 and the center f of the tool 17 constant.
[0059]
As the tool 17 moves, the cylinder 19 expands and contracts even against local unevenness of the upper plate 3 and is always pressed with a constant pressing force, preventing the plate 3 from being lifted and eliminating poor bonding. .
[0060]
Furthermore, by using the pressing jig 16 together with the clamping device 7 described in the first embodiment, the work 5 can be held more firmly and surely, and it is possible to perform reliable bonding. The rate drops significantly. Moreover, since the joining work in the immediate vicinity of the peripheral part of the workpiece 5 is possible, a compact product can be produced, and the waste of material costs is eliminated. When the clamp device 7 and the pressing jig 16 are used in combination, the workpiece 5 is pressed and held by the clamp 8 while the inclined contact surface 14 of the clamp 8 is applied to the inclined surface 6 of the workpiece 5, and the workpiece 5 is pressed by the pressing jig 16. , And the adjustment flange 20 adjusts the depth of insertion of the tool 17 into the work 5 to perform friction stir welding.
[0061]
【The invention's effect】
The friction stir welding method of the first invention uses a clamp having a contact surface formed at a substantially the same angle as the inclined surface by forming an inclined surface on the side surface of the workpiece on which friction friction welding is performed. Is applied to the inclined surface and the workpiece is pressed and held by the clamp to perform friction stir welding, so that a strong holding force can be obtained with a small force, and the contact length between the clamp and the workpiece is extremely short. can do. Therefore, it is possible to join the groove disposed in the immediate vicinity of the peripheral edge of the workpiece without changing the position of the clamp as in the prior art and without interfering with the tool holding device of the friction stirrer. Can continue. Further, the clamp can be attached such that the height of the upper surface does not protrude from the upper surface of the workpiece.
[0063]
First 2 The friction stir welding method of the present invention includes a clamp having a contact surface formed at an angle substantially the same as the inclined surface, the inclined surface being formed on a side surface of the workpiece on which friction friction welding is performed, and the tool provided around the tool. Since the pressing means that can rotate on the workpiece is used, the contact surface is applied to the inclined surface, the workpiece is pressed and held by the clamp, and the workpiece is pressed by the pressing means to perform friction stir welding. In addition, a strong holding force can be obtained with a small force, the contact length between the clamp and the workpiece can be made extremely short. Can be prevented, and poor bonding can be eliminated.
[0064]
First 3 The friction stir welding method of the invention is the first 2 In the invention, the depth of insertion of the tool into the workpiece is adjusted by the adjusting means for adjusting the distance between the tool and the pressing means along the tool axis direction. For the change, the tool insertion depth can be set to a desired value.
[0065]
First 4 In the friction stir welding apparatus of the invention, the contact surface with the workpiece of the clamp constituting the clamp device is inclined, so that a strong holding force can be obtained with a small force, and the contact length between the clamp and the workpiece can be increased. Can be extremely short. Therefore, it is possible to join the groove disposed in the immediate vicinity of the peripheral edge of the workpiece without changing the position of the clamp as in the prior art and without interfering with the tool holding device of the friction stirrer. Can continue. Further, the clamp can be attached such that the height of the upper surface does not protrude from the upper surface of the workpiece.
[0066]
First 5 The friction stir welding apparatus of the invention is the first 4 In the present invention, the clamp can be moved back and forth in a direction along the surface on which the workpiece is subjected to friction stir welding, so that the contact length between the clamp and the workpiece can be adjusted to be short.
[0067]
First 6 The friction stir welding apparatus of the invention is the first 4 In the invention, a guide groove provided on the bed, a seat disposed in the guide groove so as to be movable along the guide groove, a bolt with a hole coupled to a screw hole of the seat, and the clamp are penetrated. Since the mounting hole for the holed bolt provided and the counterbore hole for the head of the holed bolt provided in the mounting hole are provided, the height at which the holed bolt protrudes from the upper surface of the clamp is reduced. be able to.
[0068]
First 7 The friction stir welding apparatus of the invention is the first 6 In the present invention, the counterbore is deep enough to sink the head of the bolt with the hole, so that the bolt with the hole does not protrude from the upper surface of the clamp.
[0071]
First 8 The friction stir welding apparatus of the invention is In a friction stir welding apparatus that integrates a workpiece in which a plurality of members overlap with each other by friction stir welding, the friction stir welding device includes a plurality of rotating bodies and includes a pressing means that is rotatable on the workpiece around the tool. A plurality of cylinders provided around the tool and a set of fluid pressure sources connected to the plurality of cylinders, and the rotating body of the pressing means is pressed by the plurality of cylinders. The pressing means can rotate smoothly on the workpiece, and it can prevent the workpiece from lifting due to the movement of the tool against local unevenness of the workpiece, eliminating poor bonding, The workpiece can always be pressed with a constant pressing force by expanding and contracting the cylinder.
[0072]
First 9 The friction stir welding apparatus of the invention is In a friction stir welding apparatus that integrates a workpiece in which a plurality of members overlap with each other by friction stir welding, a pressing means that is rotatable on the workpiece is provided around the tool. Since the adjustment means for adjusting the distance along the tool axis direction between the pressing means and the tool, With regard to local unevenness of the workpiece, it can be prevented that the workpiece is lifted as the tool moves. The insertion depth of the tool into the workpiece can be set to a desired value with respect to the workpiece thickness change, material change, and work condition change.
[0073]
First 10 The friction stir welding apparatus of the invention is the first 9 In the invention, since the adjusting means is a screw mechanism, the distance along the tool axis direction between the pressing means and the tool can be adjusted with a simple mechanism.
[0074]
First 11 The friction stir welding apparatus according to the present invention includes a pressing means that is inclined around a contact surface of the clamp constituting the clamp device and is rotatable on the work, and the pressing means and the tool. It is possible to obtain a strong holding force with a small force and to make the contact length between the clamp and the workpiece extremely short. The tool can be prevented from lifting due to the movement of the tool even with local unevenness of the workpiece, and bonding defects can be eliminated. In addition, the tool thickness can be changed, the material can be changed, and the working conditions can be changed. The depth of insertion into the workpiece can be set to a desired value.
[0075]
First 12 Invention 5 No. from invention 7 A method of integrating a workpiece in which a plurality of members are overlapped by any one of the friction stir welding apparatuses according to the invention, wherein the workpiece is inclined at substantially the same angle as the contact surface of the clamp on the side surface on which friction stir welding is performed. A surface is formed, the contact surface is brought into contact with the inclined surface, and the workpiece is pressed and held by the clamp to perform friction stir welding, so that a strong holding force can be obtained with a small force. The contact length with can be made extremely short.
[0076]
First 13 Invention 8 No. from invention 10 A method of integrating a workpiece in which a plurality of members are overlapped by any one of the friction stir welding apparatuses according to the invention, wherein the workpiece is pressed by the pressing means to perform friction stir welding. On the other hand, it is possible to prevent the workpiece from being lifted with the movement of the tool and to eliminate the bonding failure.
[0077]
First 14 Invention 9 Invention or No. 10 A method of integrating a workpiece in which a plurality of members are overlapped by the friction stir welding apparatus of the invention, wherein the depth of insertion of the tool into the workpiece is adjusted by the adjusting means, The insertion depth of the tool into the workpiece can be set to a desired value with respect to the material change and work condition change.
[0078]
First 15 Invention 11 A method of integrating a workpiece in which a plurality of members overlap with each other by a friction stir welding apparatus according to the invention, wherein an inclined surface is formed at a substantially same angle as a contact surface of the clamp on a side surface of the workpiece on which friction stir welding is performed. Forming, applying the holding surface to the inclined surface, pressing and holding the workpiece with the clamp, pressing the workpiece with the pressing means, and adjusting the depth of insertion of the tool into the workpiece by the adjusting means Since the friction stir welding is performed, a strong holding force can be obtained with a small force, and the contact length between the clamp and the workpiece can be extremely shortened. However, it is possible to prevent the workpiece from lifting due to the movement of the tool, and to eliminate poor bonding. Furthermore, the depth of insertion of the tool into the workpiece can be reduced in response to changes in workpiece thickness, material, and work conditions. Desired It can be set to a value.
[Brief description of the drawings]
FIG. 1 is a plan view showing a clamp device according to a first embodiment of the present invention.
FIG. 2 is a view taken along II-II in FIG.
3 is a sectional view taken along line III-III in FIG.
FIG. 4 is a partial cross-sectional view of a pressing jig according to a second embodiment of the present invention.
5 is a sectional view taken along line IV-IV in FIG.
6 is a VV cross-sectional view in FIG. 4;
7 is a sectional view taken along line VII-VII in FIG.
FIG. 8 is a plan view of a two-dimensional integrated pipe showing an example of integration using a friction stir welding method.
9 is a cross-sectional view taken along the line IX-IX in FIG.
FIG. 10 is a plan view of a two-dimensional integrated pipe showing an example of integration by a friction stir welding method using a conventional clamp device.
11 is a view taken along line XI-XI in FIG.
12 is a view taken along line XII-XII in FIG.
[Explanation of symbols]
f Distance between center of groove width and tool center
H Contact length
1 plate (lower side)
2 grooves
3 Plate (upper side)
4 communication hole
5 Work
6 Inclined surface of workpiece
7 Clamping device
8 Clamp
9 Guide groove
10 seat
11 Bolt with hole
12 Mounting holes
13 counterbore
14 Inclined contact surface of clamp
15 Friction stir welding position
16 Pressing jig
17 tools
18 balls (rotating body)
19 cylinders
20 Adjustment flange
21 Boss
22 Female thread
23 volts
24 Attachment
25 Female thread
26 Male thread
27 Lock nut
28 Mounting flange
29 volts
30 Fluid pressure inlet
31 channel
32 communication hole
33 Cylinder flange
34 Cover
62 Bed of friction stir welding equipment

Claims (15)

In a friction stir welding method in which a workpiece in which a plurality of members overlap is integrated by friction stir welding,
A clamp having an abutting surface formed on a side surface of the workpiece on which friction stir welding is performed and having an abutting surface formed at substantially the same angle as the inclined surface is used, and the abutting surface is brought into contact with the inclined surface to form the clamp. A friction stir welding method, wherein the workpiece is pressed and held to perform friction stir welding. In a friction stir welding method in which a workpiece in which a plurality of members overlap is integrated by friction stir welding,
An inclined surface is formed on the side surface of the workpiece where friction stir welding is performed, a clamp having an abutment surface formed at substantially the same angle as the inclined surface, and the workpiece provided around the tool can be rotated on the workpiece. Friction stir welding, wherein the abutting surface is applied to the inclined surface, the workpiece is pressed and held by the clamp, and the workpiece is pressed by the pressing means to perform friction stir welding. Method. In claim 2 ,
A friction stir welding method characterized by adjusting an insertion depth of the tool into the workpiece by adjusting means for adjusting a distance along the tool axis direction between the tool and the pressing means. In a friction stir welding apparatus that includes a clamp device that presses and holds a workpiece in which a plurality of members overlap each other on a bed, and that integrates the workpiece pressed and held by the clamp device by friction stir welding,
A friction stir welding apparatus, wherein a contact surface of the clamp constituting the clamp apparatus with the workpiece is inclined. In claim 4 ,
The friction stir welding apparatus according to claim 1, wherein the clamp is movable back and forth in a direction along a surface on which the workpiece is subjected to friction stir welding. In claim 4 ,
A guide groove provided in the bed, a seat arranged in the guide groove so as to be movable along the guide groove, a bolt with a hole coupled to a screw hole of the seat, and a through hole provided in the clamp. A friction stir welding apparatus comprising a mounting hole for the holed bolt and a counterbore for the head of the holed bolt provided in the mounting hole. In claim 6 ,
The friction stir welding apparatus according to claim 1, wherein the counterbore is deep enough to sink a head of the bolt with the hole. In a friction stir welding apparatus that integrates a workpiece in which a plurality of members overlap with each other by friction stir welding,
Including a plurality of rotating bodies, and provided with a pressing means that is rotatable on the workpiece around the tool;
A plurality of cylinders provided around the tool and a set of fluid pressure sources connected to the plurality of cylinders, wherein the rotating body of the pressing means is pressed by the plurality of cylinders. Friction stir welding apparatus. In a friction stir welding apparatus that integrates a workpiece in which a plurality of members overlap with each other by friction stir welding,
A pressing means that is rotatable on the workpiece is provided around the tool,
A friction stir welding apparatus comprising adjusting means for adjusting a distance along the tool axis direction between the pressing means and the tool. In claim 9 ,
The friction stir welding apparatus, wherein the adjusting means is a screw mechanism. In a friction stir welding apparatus that includes a clamp device that presses and holds a workpiece in which a plurality of members overlap each other on a bed, and that integrates the workpiece pressed and held by the clamp device by friction stir welding,
The contact surface of the clamp that constitutes the clamp device with the work is inclined, and a pressing means that is rotatable on the work is provided around the tool, and the tool of the pressing means and the tool A friction stir welding apparatus comprising adjusting means for adjusting an interval along the axial direction. A method of integrating a workpiece comprising overlapping a plurality of members by friction stir welding device according to claims 5 to 7 or,
An inclined surface is formed at substantially the same angle as the abutting surface of the clamp on the side surface of the workpiece on which friction stir welding is performed, the abutting surface is applied to the inclined surface, and the workpiece is pressed and held by the clamp. Friction stir welding method characterized by performing friction stir welding. A method for integrating a workpiece in which a plurality of members are overlapped by the friction stir welding apparatus according to any one of claims 8 to 10 ,
A friction stir welding method, wherein the workpiece is pressed by the pressing means to perform friction stir welding. A method of integrating a workpiece in which a plurality of members are overlapped by the friction stir welding apparatus according to claim 9 or 10 ,
A friction stir welding method, wherein the insertion depth of the tool into the workpiece is adjusted by the adjusting means. A method for integrating a workpiece in which a plurality of members are overlapped by the friction stir welding apparatus according to claim 11 ,
An inclined surface is formed at substantially the same angle as the abutting surface of the clamp on the side surface on which friction stir welding of the workpiece is performed, the abutting surface is applied to the inclined surface, and the workpiece is pressed and held by the clamp. A friction stir welding method comprising: pressing the work by the pressing means; adjusting the insertion depth of the tool into the work by the adjusting means; and performing friction stir welding.

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