WO2016186134A1 - 摩擦攪拌接合装置および摩擦攪拌接合方法 - Google Patents
摩擦攪拌接合装置および摩擦攪拌接合方法 Download PDFInfo
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- WO2016186134A1 WO2016186134A1 PCT/JP2016/064748 JP2016064748W WO2016186134A1 WO 2016186134 A1 WO2016186134 A1 WO 2016186134A1 JP 2016064748 W JP2016064748 W JP 2016064748W WO 2016186134 A1 WO2016186134 A1 WO 2016186134A1
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- WIPO (PCT)
- Prior art keywords
- friction stir
- stir welding
- probe
- filler
- corner
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/128—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding making use of additional material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/123—Controlling or monitoring the welding process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/123—Controlling or monitoring the welding process
- B23K20/1235—Controlling or monitoring the welding process with temperature control during joining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
- B23K20/1255—Tools therefor, e.g. characterised by the shape of the probe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
- B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
- B23K20/2336—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer both layers being aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
Definitions
- the present disclosure relates to a friction stir welding apparatus and a friction stir welding method used for friction stir welding between workpieces.
- Friction stir welding tools used when performing friction stir welding include a type equipped with a rotating shoulder that rotates integrally with the probe, and a non-rotating fixed rotating probe.
- a type with an expression shoulder is known.
- a friction stir welding tool including a fixed shoulder, a fixed shoulder including a surface that abuts against both workpiece surfaces at the corner corners in order to friction stir weld the corners (inner corners) of the workpieces to be joined.
- a fixed shoulder including a surface that abuts against both workpiece surfaces at the corner corners in order to friction stir weld the corners (inner corners) of the workpieces to be joined.
- the friction stir welding performed while adding filler using a friction stir welding tool equipped with a fixed shoulder is, for example, the length to be joined when the corners of aluminum workpieces are to be joined.
- defects such as roughness may occur on the surface of the fillet formed when the length is relatively long.
- An object of the present disclosure is to provide a friction stir welding apparatus and a friction stir welding method that can suppress the occurrence.
- a friction stir welding apparatus includes a friction stir welding tool including a fixed shoulder on an outer periphery of a proximal end of a probe that can be rotationally driven, and a friction stir welding tool.
- Filler is supplied to the moving part that moves the welding tool relative to the joint between the workpieces in the direction along the joint, the controller for the moving part, and the stirring area that is stirred by the probe during friction stir welding of the joint.
- the control device holds the fixed shoulder of the friction stir welding tool with the probe immersed in the joint at a position spaced apart from the surface of the workpiece during the friction stir welding of the joint. It has a function to do.
- FIG. 1A It is a figure for demonstrating the friction stir welding method, and is a schematic cut
- FIG. 5B is an enlarged side view of the filler supply unit in the friction stir welding apparatus according to the first embodiment, as viewed in the direction of arrows BB in FIG. 5A.
- the friction stir welding method of the present disclosure uses a friction stir welding tool 1 of a type including a probe 2 and a fixed shoulder 3 as shown in FIGS. 1A and 1B.
- the friction stir welding tool 1 causes the probe 2 to be immersed in a joint between the workpieces W1 and W2, for example, the corner c in FIG. A stirring region s of the materials W1 and W2 is formed.
- the fixed shoulder 3 is disposed with a gap 4 between the surfaces P1 and P2 of the workpieces W1 and W2, and the friction stir welding is performed by moving the probe 2 along the corners c. During this time, the gap 4 is always maintained.
- the filler 5 is supplied to the stirring region s.
- the amount of the filler 5 supplied is the same as the unit length shown by the one-dot chain line in FIG. 1B, which is formed at the corner corner c after the friction stir welding, when the friction stir welding proceeds for a certain unit length.
- the volume of the fillet 6 that is geometrically determined from the cross-sectional shape of the fillet 6 is larger.
- the materials of the workpieces W1 and W2 and the material of the filler 5 are softened and stirred by the probe 2 in the stirring region s, and the materials of the workpieces W1 and W2 and the material of the filler 5 are mixed.
- the fillet 6 is formed by the softened material 7 (hereinafter referred to as the raw material softened material 7) in which is mixed.
- the excess material softened material 7 is caused to flow into the gap 4 while being softened.
- FIG. 2 is a schematic cut side view showing a first embodiment of the friction stir welding apparatus
- FIG. 3 is a partially cut schematic front view
- 4A to 4C are enlarged views of the friction stir welding tool according to this embodiment.
- FIG. 4A is a front view
- FIG. 4B is a cut side view
- FIG. 4C is a rear view.
- 5A and 5B are enlarged views of the filler supply unit in the present embodiment
- FIG. 5A is a side view
- FIG. 5B is a view taken in the direction of arrows BB in FIG. 5A.
- the friction stir welding apparatus 8 of the present embodiment has a friction stir welding tool 1 having a probe 2 and a fixed shoulder 3 and a rotational drive device 10 for the probe 2 as shown in FIGS.
- the spindle unit 9 mounted on the first end side, which is the tip side of the friction stir welding tool 1, and the friction stir welding tool 1 together with the spindle unit 9 are moved relative to the corner c between the workpieces W1 and W2.
- Filler 5 is added to the stirring region s of the materials of the workpieces W1 and W2 at the time of friction stir welding of the shaft type gate-shaped main shaft positioning mechanism (moving unit) 11, the control device 12 of the main shaft positioning mechanism 11, and the corner c.
- a filler supply unit 13 for supplying.
- the direction in which the friction stir welding tool 1 is relatively moved with respect to the corner c when the friction stir welding of the corner c is performed (the right direction in FIGS. 1A and 2) is hereinafter referred to as friction stirring. It is called the joining direction.
- the friction stir welding tool 1 includes a probe 2 that can be driven to rotate, and a fixed shoulder 3 that is disposed on the outer periphery of the proximal end side of the probe 2.
- the probe 2 is arranged in an angular posture in which the axial direction is parallel to the bisector of the angle c of the corner c between the workpieces W1 and W2.
- the corner c is a right angle
- the workpieces W1, W2 are both inclined 45 degrees from the vertical direction. Therefore, the axis of the probe 2 is inclined in the vertical direction by 45 degrees with respect to both the workpieces W1 and W2.
- the fixed shoulder 3 has two workpiece facing surfaces in which the end portion disposed near the tip of the probe 2 faces the surfaces P1 and P2 of the workpieces W1 and W2 on both sides across the corner portion c. It is the mountain shape (V shape) provided with 14a, 14b. Furthermore, in the part which becomes the top of the chevron formed by the workpiece facing surfaces 14a and 14b, as shown in FIGS. 4A and 4B, the surfaces of the workpieces W1 and W2 are located on the front side of the probe 2 in the direction of friction stir welding. A gap forming notch 15 for forming a gap 16 for inserting the filler 5 is provided between P1 and P2. In FIG.
- the gap 16 shows an example in which the cross section perpendicular to the direction of friction stir welding is a right-angled isosceles triangle, but if the filler 5 can be inserted, it corresponds to the cross section of the filler 5
- the shape is not limited to the illustrated shape.
- a fillet forming cutout portion 17 is provided by cutting out the fillet 6 having a cross-sectional shape in a shape corresponding to a desired cross-sectional shape.
- the fillet 6 has a right isosceles triangular cross section, and the cutout shape of the fillet forming cutout portion 17 is also a shape corresponding thereto.
- the notch portion 17 for fillet formation has a shape corresponding to the cross-sectional shape of the fillet 6 having a curved surface. It only has to be.
- the friction stir welding tool 1 is attached to the front end side of the spindle unit 9 as shown in FIGS. In this state, the fixed shoulder 3 is held in a state in which the main shaft unit 9 is prevented from rotating, and the probe 2 can be rotationally driven by the rotational driving device 10.
- the spindle positioning mechanism 11 is configured to place the workpieces W ⁇ b> 1 and W ⁇ b> 2 to be joined on the gantry 18 and move them along the extending direction of the corners c.
- a table 19 is provided.
- a gate-type frame 20 straddling the X-axis table 19 is installed on the gantry 18, and a Z-axis table 21 for position control of the spindle unit 9 in the vertical direction (Z-axis direction) is attached to the gate-type frame 20. It has been.
- the Z-axis table 21 includes a Y-axis table 22 that controls the position of the spindle unit 9 in a horizontal direction (hereinafter referred to as the Y-axis direction) perpendicular to the moving direction of the X-axis table 19 (hereinafter referred to as the X-axis direction). It is attached.
- the spindle unit 9 is attached to the Y-axis table 22 in a state of being disposed above the X-axis table 19.
- the X-axis table 19 includes a guide rail 23 provided on the gantry 18 so as to extend in the X-axis direction, and a moving table 25 slidably attached to the guide rail 23 via a guide block 24 as a horizontal flat plate shape. And a ball screw mechanism 26 as a linear motion mechanism in the X-axis direction for moving the moving table 25 in the longitudinal direction of the guide rail 23.
- the ball screw mechanism 26 includes a drive motor 27 such as a servo motor, a speed reducer 28 attached to the output side thereof, a screw shaft 29 connected to the output side of the speed reducer 28, and a nut attached to the screw shaft 29. Member 30.
- the ball screw mechanism 26 is installed between the moving table 25 on the gantry 18 in a posture in which the screw shaft 29 extends in parallel with the guide rail 23, and the nut member 30 is attached to the moving table 25. 31 is attached.
- the X-axis table 19 rotates the screw shaft 29 via the speed reducer 28 by the drive motor 27 in the ball screw mechanism 26 and switches the rotation direction thereof, thereby moving the moving table 25 together with the nut member 30. Can be reciprocated in the X-axis direction.
- the X-axis table 19 moves based on a detection signal of the rotation amount of the drive motor 27 or a position detection signal of the nut member 30 or the moving table 25 by a position detector (not shown) such as a linear gauge or a displacement sensor.
- a position detector such as a linear gauge or a displacement sensor.
- a jig 32 for holding the workpiece W1 and the workpiece W2 to be joined over the entire length is provided on the upper side of the moving table 25.
- the jig 32 includes a V-shaped groove 33 on the upper surface side, and the workpieces W1 and W2 are placed on the two inclined surfaces of the groove 33, and the edge of one work W1. Is placed in a posture in which the end face of the other workpiece W2 is abutted against the other.
- the jig 32 is provided with a large number of pressing members 34 arranged in the X-axis direction on the upper end side of each slope, and the workpieces W1 and W2 are pressed and fixed inside the grooves 33 by the pressing members 34. To do. Thereby, the position of the corner
- the workpieces W1 and W2 are held by the jig 32 when the friction stir welding is performed.
- the pressing load in the Z-axis direction for immersing the probe 2 of the friction stir welding tool 1 in the corner corner c, and the corner corner c Even when a load in the X-axis direction is applied when moving the probe 2 in the state of being immersed in the longitudinal direction of the corner c, the work W1 and W2 are held with such a holding force that does not shift. .
- the corners c of the workpieces W1 and W2 are corner joints
- the corners c serving as joints may be T-shaped joints, lap joints, or cross joints.
- the jig 32 What is necessary is just to change a shape suitably.
- the jig 32 is held in a posture in which the surface P1 of the workpiece W1 and the surface P2 of the workpiece W2 sandwiching the corner portion c are inclined at an equal inclination angle from the vertical direction.
- the jig 32 is inclined so that the surface P1 of the workpiece W1 and the surface P2 of the workpiece W2 are different from each other with respect to the vertical direction. You may hold
- the Z-axis table 21 is formed as a flat plate along a vertical rail (Z-axis direction) guide rail 35 installed on the portal frame 20 and a vertical plane perpendicular to the X-axis direction.
- a moving table 37 slidably attached to the guide rail 35 via a guide block 36 and a ball screw mechanism 38 as a Z-axis direction linear movement mechanism for moving the moving table 37 in the longitudinal direction of the guide rail 35 are provided. .
- the ball screw mechanism 38 includes a drive motor 39 such as a servo motor, a speed reducer 40 attached to the output side thereof, a screw shaft 41 connected to the output side of the speed reducer 40, and a nut attached to the screw shaft 41. Member 42.
- the ball screw mechanism 38 is installed in a posture in which the screw shaft 41 extends in parallel with the guide rail 35 between the movable table 37 on the surface of the portal frame 20 on the installation side of the Z-axis table 21 and a nut.
- the member 42 is attached to the moving table 37 via the load cell 44 and the attachment member 43.
- the Z-axis table 21 is driven together with the nut member 42 by rotating the screw shaft 41 via the speed reducer 40 by the drive motor 39 in the ball screw mechanism 38 and switching the rotation direction thereof. 37 can be reciprocated up and down in the Z-axis direction.
- the Z-axis table 21 is described later based on a detection signal of the rotation amount of the drive motor 39 or a position detection signal of the nut member 42 and the moving table 37 by a position detector (not shown) such as a linear gauge or a displacement sensor.
- a position detector such as a linear gauge or a displacement sensor.
- the Z-axis table 21 can detect a pressing load in a direction toward the corner portion c applied to the friction stir welding tool 1 when performing the friction stir welding based on the detection signal of the load cell 44.
- the Z-axis table 21 is a gravity compensation mechanism (also referred to as a self-weight compensation mechanism or a weight compensation mechanism) that supports the weight of the movable table 37 and the weight of the movable table 37 that moves up and down together.
- the gate frame 20 and the moving table 37 may be interposed. According to this configuration, the load cell 44 can directly detect the pressing load applied to the corner portion c applied to the friction stir welding tool 1.
- the Y-axis table 22 is guided as a flat plate along a Y-axis direction guide rail 45 installed on the moving table 37 of the Z-axis table 21 and a vertical plane perpendicular to the X-axis direction.
- a moving table 47 slidably attached to the rail 45 via a guide block 46 and a ball screw mechanism 48 as a Y axis direction linear motion mechanism for moving the moving table 47 in the longitudinal direction of the guide rail 45 are provided.
- the ball screw mechanism 48 includes a drive motor 49 such as a servo motor, a screw shaft 50 connected to the output side thereof, and a nut member 51 attached to the screw shaft 50.
- a drive motor 49 such as a servo motor
- a screw shaft 50 connected to the output side thereof
- a nut member 51 attached to the screw shaft 50.
- the ball screw mechanism 48 is installed between the moving table 37 and the moving table 47 in such a posture that the screw shaft 50 extends in parallel with the guide rail 45, and the nut member 51 is attached to the moving table 47. It is attached via 52.
- the spindle unit 9 is attached to the moving table 47.
- the Y-axis table 22 rotates the screw shaft 50 by the drive motor 49 in the ball screw mechanism 48 and switches the rotation direction thereof, thereby moving the moving table 47 together with the nut member 51 in the Y-axis direction. Can be moved back and forth.
- the Y-axis table 22 moves based on a detection signal of the rotation amount of the drive motor 49 or a position detection signal of the nut member 51 or the moving table 47 by a position detector (not shown) such as a linear gauge or a displacement sensor.
- the positions of the spindle unit 9 and the friction stir welding tool 1 held on the table 47 in the Y-axis direction can be controlled.
- the control device 12 of the spindle positioning mechanism 11 is configured so that the corner c between the workpieces W1 and W2 extends in the friction stir welding tool 1 attached to the spindle unit 9 by controlling the Z-axis table 21 and the Y-axis table 22. A function of controlling the vertical and horizontal positions in a plane perpendicular to the horizontal axis.
- the control device 12 has a function of controlling the position of the corners c of the workpieces W1 and W2 held on the moving table 25 via the jig 32 by controlling the X-axis table 19 in the X-axis direction.
- control device 12 controls the rotational drive of the probe 2 through the control of the rotational drive device 10 of the spindle unit 9.
- the control device 12 When performing the friction stir welding, the control device 12 first controls the corners c of the workpieces W1 and W2 at the first end (one end) in the longitudinal direction under the control of the X-axis table 19, as shown in FIG. It arrange
- the control device 12 starts to move the moving table 25 of the X-axis table 19 and relatively moves the probe 2 along the corner corner c between the workpieces W1 and W2, so that the corner c Friction stir welding is performed. Thereafter, when the probe 2 reaches the terminal end side of the friction stir welding set on the second end (other end) side (right end side in FIG. 1) in the longitudinal direction of the corner portion c, the control device 12 moves the moving table. After stopping 25, the Z-axis table 21 is controlled and the probe 2 is extracted from the corner c.
- control device 12 controls the position of the fixed shoulder 3 of the friction stir welding tool 1 as shown in FIG. 1B by controlling the Z-axis table 21 during the friction stir welding as described above. A function of holding the gap 4 between the surfaces P1 and P2 of W1 and W2 is provided.
- the control device 12 is based on the information on the positions of the surfaces P1, P2 of the workpieces W1, W2 held by the X-axis table 19. What is necessary is just to control the position of the fixed shoulder 3 by making the position which separated the desired clearance gap 4 from the surface P1, P2 into a target position.
- the control device 12 controls the pressing load of the probe 2 detected by the load cell 44 in a state where the probe 2 is immersed in the corner corner c, so that the control device 12 is interposed between the surfaces P1 and P2 of the workpieces W1 and W2.
- the fixed shoulder 3 may be held at a position where the desired gap 4 is formed.
- the lower and upper limits of the size of the gap 4 are such that the softened material 7 softened and stirred by the probe 2 flows into the gap 4 in the softened state, and the workpiece facing surfaces 14a and 14b of the fixed shoulder 3 and the workpieces W1 and W2 Is set to a size range in which the gap 4 can be filled with the surfaces P1 and P2.
- the material softened material 7 stirred by the probe 2 has fluidity, but it is solid and not liquid. Therefore, when the gap 4 is too small, the resistance when the material softened material flows into the gap 4 becomes large. In this case, the material softened material 7 cannot spread into the gap 4. Therefore, the lower limit of the dimension of the gap 4 depends on the fluidity of the material softened material 7.
- the size of the gap 4 is preferably set to 0.1 mm or more.
- the upper limit of the dimension of the gap 4 is determined as follows.
- the heat (frictional heat) generated by the rotating probe 2 is converted into the entire softened material 7 entering the gap 4. In addition, it must be transmitted under temperature conditions that can maintain the softened state.
- the amount of heat generated by the probe 2 depends on the construction conditions of the friction stir welding, such as the structure of the probe 2, the number of rotations, the amount of immersion in the corner c, and the relative movement speed with respect to the corner c. Therefore, the amount (volume) of the material softened material 7 that can be softened by the heat generated by the probe 2 during the friction stir welding has an upper limit depending on the properties and heat transfer characteristics of the material. Therefore, the upper limit of the volume of the gap 4 in which the excess material softened material 7 used for forming the fillet 6 can flow in and expand is determined. Therefore, the upper limit value of the size of the gap 4 is determined by dividing the upper limit value of the volume of the gap 4 by the area of the workpiece facing surfaces 14 a and 14 b of the fixed shoulder 3.
- the softened material softened material 7 entering the gap 4 is in a state of protruding from the surfaces P1 and P2 of the workpieces W1 and W2. For this reason, depending on the types of the workpieces W1 and W2, it may be desired to suppress stress concentration on the protruding portions formed on the surfaces P1 and P2. From this viewpoint, the upper limit value of the dimension of the gap 4 is set. It may be.
- the supply amount of the filler 5 described above is an amount obtained by adding the volume per unit length in the direction of friction stir welding of the gap 4 to the volume per unit length of the fillet 6 formed at the corner corner c. It is set to be above.
- the filler supply unit 13 is configured such that the wire-like filler 5 as shown in FIG. 1A is placed between the workpieces W1 and W2 by the gap forming notch 15 of the fixed shoulder 3 shown in FIGS. 4A and 4B.
- the liquid is supplied to the stirring region s through the formed gap 16.
- the filler supply unit 13 is provided on the lower end side (front end side) of the spindle unit 9 in an arrangement that is in front of the friction stir welding progressing direction with respect to the attachment location of the friction stir welding tool 1.
- the bracket 53 is provided.
- a frame 55 holding a roller 54 that holds the filler 5 from above is disposed below the bracket 53.
- a plurality of, for example, two guide rods 56 extending in the vertical direction are erected, and the guide rods 56 are inserted into vertical guide holes (not shown) provided in the bracket 53.
- a retaining member 57 is attached to the upper end side, being inserted from below.
- a spring 58 as a pressurizing portion is fitted.
- the filler supply unit 13 is configured to place the probe 2 in a state in which the filler 5 is arranged in advance along the corner corner c located in front of the friction stir welding progressing direction with respect to the friction stir welding tool 1.
- the roller 54 contacts the filler 5 from above.
- the spring 58 contracts between the frame 55 of the roller 54 and the bracket 53, and the contracted spring 58 The restoring force of the roller 54 can press the roller 54 against the filler 5 from above.
- the pressurizing unit is exemplified by the spring 58, but any other type of pressurizing unit such as a gas spring or a fluid pressure cylinder may be used as long as it can apply a pressing force in the direction toward the filler 5 to the roller 54.
- a pressure unit may be employed, and a pressurizing unit that actively generates a pressing force such as an actuator may be employed.
- the filler 5 is fixed to the corner portion c.
- the filler 5 is between the gap forming notch 15 of the fixed shoulder 3 and the surfaces P1 and P2 of the workpieces W1 and W2. Are introduced into the agitation region s.
- the filler supply unit 13 applies a pressure of at least 1 MPa or more to the tip side of the filler 5 supplied to the stirring region s in a direction perpendicular to the supply direction.
- the filler 5 is supplied to the stirring region s relatively with the progress of the friction stir welding of the corner c by the friction stir welding tool 1 in a state where the filler 5 is pressed against the corner c. Therefore, in this embodiment, the frictional force (maximum frictional force) generated between the filler 5 and the surfaces P1 and P2 of the workpieces W1 and W2 on both sides of the corner corner c is applied to the surfaces P1 and P2 that become the friction surfaces. It is the product of the pressure, the area of the surfaces P1 and P2 and the friction coefficient, and at the same time, the product of the pressure applied to the tip of the filler 5 and the cross-sectional area of the filler 5.
- the filler 5 is filled by the roller 54 in consideration of the friction coefficient between the filler 5 and the surfaces P1 and P2 so that a pressure of at least 1 MPa or more is applied to the front end side of the filler 5 in a direction perpendicular to the supply direction of the filler 5.
- the pressure applied when pressurizing is set.
- the upper limit of the pressure applied to the front end side of the filler 5 supplied to the stirring region s is determined by the buckling strength from the position pressed by the roller 54 of the filler 5 to the front end.
- the filler 5 is fixed to the corner portion c.
- the cross-sectional area of the filler 5 is the cross-sectional area of the fillet 6 formed at the corner corner c in a cross section perpendicular to the friction stir welding progress direction of the gap 4. It is set to be equal to or larger than the area obtained by adding the cross-sectional areas.
- the friction stir welding apparatus 8 of this embodiment after the probe 2 of the friction stir welding tool 1 is immersed in the corner c between the workpieces W1 and W2, the probe 2 is moved along the corner c. Accordingly, the corners c of the workpieces W1 and W2 are friction stir welded.
- the fixed shoulder 3 of the friction stir welding tool 1 is not in contact with the surfaces P1 and P2 of the workpieces W1 and W2. Further, since the material softened material 7 exists in the gap 4 between the workpiece facing surfaces 14a, 14b of the fixed shoulder 3 and the surfaces P1, P2 of the workpieces W1, W2, the material softening of the fixed shoulder 3 is performed. It is suppressed that the solidified thing 7 adheres and accumulates. Even if the softened material 7 solidified adheres to the fixed shoulder 3, the adhered material is prevented from rubbing the surface of the fillet 6.
- the friction stir welding apparatus of the present embodiment while adding the filler 5 to the corner c, which is a joint between the workpieces W1 and W2, using the friction stir welding tool 1 provided with the fixed shoulder 3.
- friction stir welding it is possible to suppress the occurrence of defects on the surface of the fillet 6 formed at the corner corner c.
- FIG. 6 shows a second embodiment of the friction stir welding apparatus
- FIGS. 6A and 6B are schematic views showing other examples of the filler supply unit.
- the filler supply unit 13a shown in FIG. 6A is configured by connecting a drive motor 59 as a rotation drive unit to the roller 54 in the same configuration as the filler supply unit 13 of the first embodiment.
- a power transmission mechanism for transmitting a rotational driving force such as a gear or a chain and a sprocket is provided between the drive motor 59 and the roller 54.
- the rotational drive direction of the roller 54 by the drive motor 59 is the clockwise direction in FIG. 6A, and the roller 54 is sent in a direction in which the filler 5 on which the roller 54 is pressed from above is directed toward the friction stir welding tool 1. As described above, a driving force is applied to the filler 5.
- the filler 5 can be actively supplied to the stirring region s by driving the roller 54 to rotate.
- the filler supply unit 13b shown in FIG. 6B includes a delivery unit 60 for the filler 5 on the front side in the direction of friction stir welding with respect to the roller 54 in the same configuration as the filler supply unit 13 of the first embodiment.
- the delivery unit 60 includes, for example, a pair of delivery rollers 61 arranged so as to sandwich the filler 5 and a rotation drive unit (not shown) that rotationally drives the delivery rollers 61 in directions facing each other.
- the feeding direction of the filler by the feeding roller 61 is leftward in FIG. 6B, and the feeding roller 61 gives a driving force to the filler 5 so that the filler 5 is fed in the direction toward the friction stir welding tool 1.
- the filler 5 delivered from the delivery unit 60 can be actively supplied to the stirring region s while being guided by the roller 54.
- the filler supply sections 13a and 13b apply a pressure of at least 1 MPa to the tip side of the filler 5 supplied to the stirring region s in a direction perpendicular to the supply direction. .
- the cross-sectional area of the cross section perpendicular to the direction of friction stir welding of the gap 4 is added to the cross-sectional area of the fillet 6 formed at the corner c. It is possible to use the filler 5 having a smaller cross-sectional area than the measured value. Therefore, when the supply amount of the filler 5 of the first embodiment is a predetermined amount, the supply amount of the filler 5 in the second embodiment can be equal to or more than the predetermined amount.
- FIG. 7A shows a photograph of a joint portion by conventional friction stir welding
- FIG. 7B shows a photograph of a joint portion by friction stir welding in the present disclosure. From FIG. 7A, it can be seen that the gap 4 is not formed between the workpiece W1 and the workpiece W2 or that a plurality of defects are generated in the joint portion by the friction stir welding due to insufficient supply of the filler 5.
- FIG. 7B in the joint portion by friction stir welding in the present disclosure, a gap 4 is formed between the workpiece W1 and the workpiece W2, and a defect is formed because the supply amount of the filler 5 is sufficient. You can see that it is not.
- the filler 5 is shown as having a round cross section, but a filler having a square cross section or any other cross section may be used. Moreover, although the filler 5 was demonstrated as a wire-shaped thing, a rod shape may be sufficient.
- the filler supply part 13 fixes the filler 5 to the corner
- the phenomenon in which the filler 5 is pushed back in the direction of friction stir welding by the softened material 7 present in the stirring region s formed around the probe 2 or the probe 2 may occur.
- the friction stir welding progress direction of the gap 4 is added to the cross-sectional area of the fillet 6 formed at the corner corner c so that the supply amount of the filler 5 becomes the above-described predetermined amount. What is necessary is just to use the filler 5 of the cross-sectional area exceeding the area which added the cross-sectional area in a cross section perpendicular
- the workpieces W1 and W2 to be joined by friction stir welding are shown as being arranged with the end face of the workpiece W2 in contact with the edge of the workpiece W1, but the workpiece W1 and the workpiece A gap may be formed between W2.
- the jigs 32 may hold the workpieces W1 and W2 in a state where they are arranged with a gap therebetween, and the friction stir welding may be performed in this state.
- the filler supply amount may be determined by an amount that allows for the amount to enter the gap.
- the friction stir welding apparatus and the friction stir welding method of the present disclosure have been described with respect to an example in which the workpieces W1 and W2 are subjected to friction stir welding in a state where the corners c are arranged in an upwardly opened posture
- the workpiece W1 is described.
- W2 may be in any direction.
- the direction in which the corner c between the workpieces W1 and W2 extends is the X axis
- the direction of the three-dimensional orthogonal coordinate system in which the Y axis and the Z axis are set in a plane perpendicular to the X axis is the workpiece W1, W2. It may be arranged according to the posture.
- the friction stir welding apparatus and the friction stir welding method of the present disclosure include a first work and a second work disposed in contact with the end edge at an angle posture intersecting the surface P1 of the first work,
- the corners c formed on both sides of the second workpiece may be applied when the friction stir welding is performed by two friction stir welding tools respectively disposed on both sides of the second workpiece.
- the friction stir welding apparatus and the friction stir welding method of the present disclosure may be applied to, for example, friction stir welding of a joint portion in which end portions of flat workpieces are butted together.
- the friction stir welding tool a friction stir welding tool including a fixed shoulder having a flat workpiece facing surface is used.
- the supply amount of the filler 5 is a gap required for filling the gap formed at the abutting portion between the workpieces with respect to the surface of each workpiece. What is necessary is just to set more than the quantity which added the volume required in order to fill the clearance gap 4 when arrange
- a portal frame 20 that supports the spindle unit 9 is used as a moving part for moving the friction stir welding tool 1 together with the spindle unit 9 in the direction along the corners with respect to the corners c of the workpieces W1 and W2.
- the spindle positioning mechanism 11 of the type that moves and moves the workpieces W1, W2 is illustrated.
- any type of moving unit other than that illustrated may be employed, such as fixing the workpieces W1 and W2 and making the gate-type frame 20 straddling the workpieces movable.
- the friction stir welding apparatus and the friction stir welding method of the present disclosure when the friction stir welding is performed while adding the filler between the workpieces using the friction stir welding tool including the fixed shoulder, It can suppress that a defect arises on the surface of the fillet formed along.
- Friction stir welding tool 2 Probe 3 Fixed shoulder 4 Gap 5 Filler 6 Fillet 11 Spindle positioning mechanism (moving part) 12 Control Device 13 Filler Supply Unit 15 Gaps Formation Notch 16 Gaps 17 Fillet Formation Notch (Notch) W1, W2 Work P1, P2 surface c Corner corner (joint) s Stirring area
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Abstract
Description
本願は、2015年5月18日に、日本に出願された特願2015-101210号に基づき優先権を主張し、その内容をここに援用する。
先ず、本開示の摩擦攪拌接合方法について、図1A、図1Bを参照して概説する。
図2は摩擦攪拌接合装置の第1実施形態を示す概略切断側面図、図3は一部切断概略正面図である。図4A~図4Cは、本実施形態における摩擦攪拌接合ツールを拡大した図であり、図4Aは正面図、図4Bは切断側面図、図4Cは背面図である。図5Aおよび図5Bは、本実施形態におけるフィラー供給部の拡大図であり、図5Aは側面図、図5Bは図5AのB-B方向矢視図である。
図6は、摩擦攪拌接合装置の第2実施形態を示すもので、図6A、図6Bはいずれもフィラー供給部の他の例を示す概要図である。
2 プローブ
3 固定式ショルダ
4 隙間
5 フィラー
6 フィレット
11 主軸位置決め機構(移動部)
12 制御装置
13 フィラー供給部
15 空隙形成用切欠部
16 空隙
17 フィレット形成用切欠部(切欠部)
W1,W2 ワーク
P1,P2 面
c 角隅部(接合部)
s 攪拌領域
Claims (10)
- 回転駆動可能なプローブの基端側の外周に固定式ショルダを備えた摩擦攪拌接合ツールと、
前記摩擦攪拌接合ツールをワーク間の接合部に対して、該接合部に沿う方向に相対移動させる移動部と、
前記移動部の制御装置と、
前記接合部の摩擦攪拌接合時に前記プローブによって攪拌される攪拌領域にフィラーを供給するフィラー供給部とを備え、
前記制御装置は、前記接合部の摩擦攪拌接合時に、前記プローブを前記接合部に没入させた前記摩擦攪拌接合ツールの前記固定式ショルダを、前記ワークの面に対し隙間を隔てた位置に保持する機能を備える摩擦攪拌接合装置。 - 前記フィラー供給部は、前記摩擦攪拌接合ツールに対して摩擦攪拌接合進行方向の前側に配置されている請求項1記載の摩擦攪拌接合装置。
- 前記フィラー供給部は、前記攪拌領域に供給される前記フィラーの先端側に、供給方向とは垂直方向に少なくとも1MPa以上の圧力をかける請求項2記載の摩擦攪拌接合装置。
- 前記ワーク間の接合部が、角隅部であり、
前記フィラー供給装置は、前記フィラーを、前記角隅部に形成されるフィレットの単位長さ当たりの体積に、前記隙間の摩擦攪拌接合進行方向に関する単位長さ当たりの容積分を足した量以上の供給量で供給する請求項1記載の摩擦攪拌接合装置。 - 前記ワーク間の接合部が、角隅部であり、
前記フィラー供給装置は、前記フィラーを、前記角隅部に形成されるフィレットの単位長さ当たりの体積に、前記隙間の摩擦攪拌接合進行方向に関する単位長さ当たりの容積分を足した量以上の供給量で供給する請求項2記載の摩擦攪拌接合装置。 - 前記ワーク間の接合部が、角隅部であり、
前記フィラー供給装置は、前記フィラーを、前記角隅部に形成されるフィレットの単位長さ当たりの体積に、前記隙間の摩擦攪拌接合進行方向に関する単位長さ当たりの容積分を足した量以上の供給量で供給する請求項3記載の摩擦攪拌接合装置。 - 前記摩擦攪拌接合ツールの固定式ショルダは、
前記プローブの先端寄りに配置される端部が、前記角隅部を挟んだ両ワークの面に対向して配置される2つのワーク対向面を備えた山形とされ、
該山形の頂部におけるプローブよりも摩擦攪拌接合進行方向の前側には、前記ワークの面との間に空隙を形成する空隙形成用切欠部を備え、
前記山形の頂部におけるプローブよりも摩擦攪拌接合進行方向の後側には、前記フィレットの断面形状に応じた切欠部を備える請求項4記載の摩擦攪拌接合装置。 - 前記摩擦攪拌接合ツールの固定式ショルダは、
前記プローブの先端寄りに配置される端部が、前記角隅部を挟んだ両ワークの面に対向して配置される2つのワーク対向面を備えた山形とされ、
該山形の頂部におけるプローブよりも摩擦攪拌接合進行方向の前側には、前記ワークの面との間に空隙を形成する空隙形成用切欠部を備え、
前記山形の頂部におけるプローブよりも摩擦攪拌接合進行方向の後側には、前記フィレットの断面形状に応じた切欠部を備える請求項5記載の摩擦攪拌接合装置。 - 前記摩擦攪拌接合ツールの固定式ショルダは、
前記プローブの先端寄りに配置される端部が、前記角隅部を挟んだ両ワークの面に対向して配置される2つのワーク対向面を備えた山形とされ、
該山形の頂部におけるプローブよりも摩擦攪拌接合進行方向の前側には、前記ワークの面との間に空隙を形成する空隙形成用切欠部を備え、
前記山形の頂部におけるプローブよりも摩擦攪拌接合進行方向の後側には、前記フィレットの断面形状に応じた切欠部を備える請求項6記載の摩擦攪拌接合装置。 - 回転駆動可能なプローブの基端側に固定式ショルダを備えた摩擦攪拌接合ツールを、ワーク間の接合部に配置して該接合部の摩擦攪拌接合を行うときに、
前記プローブを前記接合部に没入させた前記摩擦攪拌接合ツールの前記固定式ショルダを、前記ワークの面に対し隙間を隔てた位置に保持し、
前記プローブによって前記ワークの素材が攪拌される攪拌領域にフィラーを供給して、
前記攪拌領域で軟化および攪拌されるワークの素材とフィラーの素材の軟化物が、前記隙間に流入する摩擦攪拌接合方法。
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11241756B2 (en) * | 2017-07-25 | 2022-02-08 | Nippon Light Metal Company, Ltd. | Joining method |
WO2020208844A1 (ja) * | 2019-04-12 | 2020-10-15 | 日本軽金属株式会社 | 接合方法 |
JP2020171953A (ja) * | 2019-04-12 | 2020-10-22 | 日本軽金属株式会社 | 接合方法 |
JP7140036B2 (ja) | 2019-04-12 | 2022-09-21 | 日本軽金属株式会社 | 接合方法 |
US11806802B2 (en) | 2019-04-12 | 2023-11-07 | Nippon Light Metal Company, Ltd. | Joining method |
Also Published As
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JPWO2016186134A1 (ja) | 2018-01-18 |
KR20170129930A (ko) | 2017-11-27 |
JP6372615B2 (ja) | 2018-08-15 |
US20180071861A1 (en) | 2018-03-15 |
CN107708911A (zh) | 2018-02-16 |
EP3299108A1 (en) | 2018-03-28 |
EP3299108A4 (en) | 2019-01-23 |
CN107708911B (zh) | 2020-01-24 |
US11229972B2 (en) | 2022-01-25 |
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