Method of manufacturing welded member

Abstract

To provide a technique for improving joint strength between a nut and a metal member.SOLUTION: The invention relates to a manufacturing method of a welded member in which a metal member and a nut are welded. The manufacturing method of the welded member includes: bringing the nut into abutment with a welding surface of a plate-shaped portion of the metal member and pressing at least one of the plate-shaped portion or the nut to bring the nut into close contact with the welding surface. The manufacturing method further includes radiating a beam to a portion of the nut in close contact with the welding surface from a side opposite to the welding surface of the plate-shaped portion to weld the metal member and the nut to each other by laser welding.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a method for manufacturing a welded component. [Background technology]

[0002] Patent Document 1 discloses a method for laser welding a nut having a protrusion to a steel plate. In this welding method, the protrusion is brought into contact with the steel plate, and a beam is irradiated from the steel plate side toward a gap formed between the nut and the steel plate by the protrusion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-053567 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned welding method, since the steel plate and the nut are separated at the position where the beam is irradiated, even if the steel material melted by the beam melts toward the nut, it may not reach the nut and a gap may remain. Also, in the above-mentioned welding method, the nut may tilt during welding due to thermal expansion or thermal contraction of the part irradiated with the beam, which may easily cause poor welding between the nut and the steel plate. This causes a problem of reduced joint strength between the nut and the steel plate.

[0005] One aspect of the present disclosure aims to provide a technique for improving the joint strength between a nut and a metal member. [Means for solving the problem]

[0006] One aspect of the present disclosure is a method for manufacturing a welded member in which a metal member and a nut are welded. The method for manufacturing the welded member includes bringing a nut into contact with a welding surface of a plate-shaped portion of the metal member, and pressing at least one of the plate-shaped portion and the nut to bring the nut into close contact with the welding surface. The method for manufacturing the welded member also includes irradiating a beam from the opposite side of the welding surface of the plate-shaped portion toward a portion of the nut that comes into close contact with the welding surface, thereby laser welding the metal member and the nut.

[0007] In this configuration, the metal member and the nut are laser welded together in a state where the nut is in close contact with the welding surface by pressing at least one of the plate-shaped portion and the nut. This makes it difficult for a gap to form between the nut and the welding surface, and also makes it difficult for welding defects to occur due to thermal expansion or thermal contraction of the portion irradiated with the beam to occur. This improves the joining strength between the nut and the metal member.

[0008] In one aspect of the disclosure, the nut may be pressed against the weld surface by pressing the nut against the weld surface. According to this configuration, the entire nut can be pressed, making it easy to apply a large pressing force.

[0009] In one aspect of the present disclosure, the nut may have a protrusion. The protrusion may protrude toward the welding surface and may abut against the welding surface. The beam may be irradiated toward the protrusion. With this configuration, the beam is irradiated toward the protrusion, which is the part of the nut that comes into contact with the metal member, so that the bonding strength between the nut and the metal member can be improved even if a gap is formed between the nut and the welding surface by the protrusion.

[0010] In one embodiment of the present disclosure, the beam diameter at the minimum intersection position where the area of ​​the intersection surface included in the intersection region where the plate-shaped portion and the virtual irradiation region of the beam intersect is minimum may be 0.9 times or more the maximum width of the protrusion. The maximum width may be the maximum length of the protrusion along the direction in which the region irradiated with the beam moves during laser welding.

[0011] With this configuration, the occurrence of deep holes in the welded portion formed by melting the protrusion, which is likely to occur due to a small beam diameter, is suppressed, and the protrusion can be melted appropriately.

[0012] In one aspect of the present disclosure, the metal member may be made of ultra-high tensile material. With this configuration, the joining strength between the ultra-high tensile material and the nut tends to be stable. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a diagram illustrating a welded member. [Diagram 2] FIG. 4 is a bottom view showing a schematic view of the nut. [Diagram 3] 1A to 1C are diagrams illustrating a method for manufacturing a welded member. [Figure 4] 11 is a plan view showing a state in which a nut is held by a nut holding portion. FIG. [Diagram 5] 1 is a diagram showing the minimum intersection position of the beam when the object to be irradiated is irradiated in-focus or out-of-focus. FIG. [Figure 6] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. [1. Configuration] <Welding materials> A welded member 100 shown in FIG. 1 is a member in which a metal member 1 and a nut 2 are welded by a laser.

[0015] The metal member 1 is, for example, a thin plate-like member having a thickness of 3.0 mm or less. The thickness of the metal member is preferably 1.6 mm or less, and more preferably 1.0 mm. The metal member 1 is made of ultra-high tensile steel, i.e., ultra-high tensile material, having a tensile strength of 1180 MPa or more. The tensile strength of the metal member is more preferably 1470 MPa or more. The metal member 1 has a welded surface 11 to which the nut 2 is welded, and a non-welded surface 12 opposite to the welded surface 11. The metal member 1 also has at least one hole 13 penetrating the metal member 1 in the thickness direction, which is the direction in which the welded surface 11 and the non-welded surface 12 are aligned.

[0016] The nut 2 is a square weld nut used for projection welding, made of a metal such as iron. The nut may have a circular or polygonal shape other than a square in plan view, or may have a flange. The nut may also be designed for laser welding. As shown in FIG. 1 and FIG. 2, the nut 2 includes a screw hole 21, a first end face 22, a second end face 23, four protrusions 24, and a side face 25.

[0017] The screw hole 21 is provided so as to pass through the nut 2. A bolt or the like is inserted into the screw hole 21 so as to be capable of being fastened. The first end face 22 and the second end face 23 surround the openings located at both ends of the screw hole 21, and the side face 25 connects the first end face 22 and the second end face 23. In this embodiment, the side face 25 is composed of four faces, and two adjacent faces are perpendicular to each other.

[0018] The protrusion 24 is a portion that is melted by laser welding and is a portion that protrudes from the first end face 22. The protrusion 24 protrudes toward the welding surface 11 of the metal member 1 and abuts against the welding surface 11. In this embodiment, the protrusion 24 extends from the side surface 25 and the first end face 22 so as to cover a corner portion at a position where the side surface 25 and the first end face 22 intersect. The protrusion may extend only from the side surface or may protrude only from the first end face. In this embodiment, four protrusions 24 are provided so as to surround the opening 21A at approximately regular intervals. Specifically, the protrusions 24 are located at each corner of the nut 2. The number of protrusions may be, for example, three or five or more.

[0019] The protrusion 24 has a tip surface 241 that abuts against the welding surface 11. As shown in Fig. 2, the outer shape of the tip surface 241 is semicircular, and a straight line portion of the outer edge of the tip surface 241 faces the central axis A that passes through the center of the screw hole 21 of the nut 2. The protrusion may have various shapes. In the following description, the welded portion between the metal member 1 and the nut 2 that is formed by melting the metal member 1 and the protrusion 24 by laser welding is referred to as the welded portion 24A.

[0020] <Laser welding equipment> Next, the laser welding device 200 will be described with reference to Fig. 3 and Fig. 4. Fig. 3 shows a state during laser welding of a metal member 1 and a nut 2 by the laser welding device 200. Fig. 4 shows a state in which the nut 2 is held by a nut holding portion 6 described below. The laser welding device 200 includes a material fixing clamp 3, a clamp receiver 4, a clamper 5, the nut holding portion 6, a pressure cylinder 7, and a laser irradiator 8.

[0021] The material fixing clamp 3 and the clamp receiver 4 are arranged to face each other in the vertical direction, and are jigs capable of placing the metal member 1 therebetween and clamping the metal member 1. The clamp receiver 4 is arranged below the material fixing clamp 3. In this embodiment, the clamp receiver 4 is configured to form an internal space for placing a nut 2 to be welded to the metal member 1. The material fixing clamp 3 is configured to form a space above the above-mentioned internal space for irradiating the metal member 1 with a beam L from a laser irradiator 8, which will be described later. For example, as shown in FIG. 3, a first end 14 and a second end 15 of the metal member 1 are clamped by the material fixing clamp 3 and the clamp receiver 4.

[0022] The clamper 5 is a fixture for fixing the material fixing clamp 3 and the clamp receiver 4. The clamper 5 is disposed above the material fixing clamp 3. The clamper 5 is disposed so as not to interfere with the beam L irradiated from the laser irradiator 8, which will be described later. The clamper may also function to press the material fixing clamp downward so that the metal member 1 is pressed toward the nut 2.

[0023] The nut holding part 6 is a jig for holding the nut 2. The nut holding part 6 holds the nut 2 with the protrusion 24 of the nut 2 facing upward. The nut holding part 6 includes a base 61 and a holding claw 62.

[0024] The base 61 is a plate-like member having a rectangular outer shape in a plan view on which the nut 2 is disposed. The base 61 has a contact surface 611 that comes into contact with the second end surface 23 of the nut 2. The retaining claws 62 are portions that protrude beyond the abutment surface 611 of the base 61 and abut against the side surface 25 of the nut 2. In this embodiment, as shown in FIG. 3, the retaining claws 62 extend from the end surface of the base 61. The retaining claws may protrude from a portion of the abutment surface of the base that does not abut against the nut 2. In this embodiment, as shown in FIG. 4, four retaining claws 62 are provided so as to surround the base 61 at approximately regular intervals. Specifically, the retaining claws 62 are located at approximately the centers of the four surfaces that constitute the end surface of the base 61. The number of retaining claws may be, for example, two or three. As described above, the protrusions 24 of the nut 2 are located at the four corners of the nut 2, so that when the nut 2 is placed on the base 61, the protrusions 24 of the nut 2 are located between two adjacent retaining claws 62.

[0025] This makes it easy to position the nut 2 relative to the nut holding portion 6 in the laser welding device 200. In addition, the holding claws 62 can suppress rotation of the nut 2 about the central axis A.

[0026] The pressure cylinder 7 is a device for pressing the nut 2 against the welding surface 11 of the metal member 1. The pressure cylinder 7 is disposed in the above-mentioned internal space formed by the clamp receiver 4, and is disposed below the nut holding portion 6. The pressure cylinder 7 presses the nut 2 against the welding surface 11 by pushing the nut holding portion 6 upward.

[0027] The laser irradiator 8 is disposed above the clamper 5 and is a device that irradiates the beam L downward. The laser irradiator 8 is configured so that the size of the beam diameter of the beam L can be changed by defocusing. In this embodiment, the beam L is irradiated in focus to the irradiated object. In focus means that the focus H of the beam L is set at the back of the irradiated object M1, as shown in the irradiated object M1 in FIG. 5. The beam L may be irradiated out of focus to the irradiated object. Out of focus means that the focus H of the beam L is set in front of the irradiated object M2, as shown in the irradiated object M2 in FIG. However, in the case of in focus, the diameter of the irradiation area of ​​the beam L becomes smaller as the beam L advances in the irradiation direction, so that it is easier to concentrate the heat of the beam L on the irradiated object M1 compared to the case of out focus. As shown in Fig. 5 and Fig. 6, the beam diameter d is the diameter of the irradiation area of ​​the beam L at the minimum intersection position L1 where the area of ​​the intersection surface included in the intersection area R1 or R2 where the irradiated object M1 or the irradiated object M2 intersects with the virtual irradiation area of ​​the beam L is the minimum. The virtual irradiation area of ​​the beam L is the irradiation area of ​​the beam L when the irradiated objects M1 and M2 do not exist. The intersection surface is a surface that spreads approximately perpendicularly to the thickness direction at any position in the thickness direction of the irradiated objects M1 and M2. The laser irradiator may be provided with a change member that changes the path of light, such as a DOE (Diffractive Optical Element), so as to change the size of the beam diameter of the beam.

[0028] <Method of manufacturing welded components using a laser welding device> A method for manufacturing the welded member 100 using the laser welding device 200 will be described with reference to FIGS.

[0029] First, the nut 2 is brought into contact with the welding surface 11 of the metal member 1. Specifically, the nut 2 is placed on the nut holding part 6 arranged on the pressure cylinder 7 with the protrusion 24 facing upward. Then, the metal member 1 is placed on the nut 2 so that the screw hole 21 of the nut 2 and the hole part 13 of the metal member 1 overlap with each other and the protrusion 24 and the metal member 1 come into contact with each other. Then, the metal member 1 placed on the nut 2 is fixed by the material fixing clamp 3, the clamp receiver 4, and the clamper 5.

[0030] Next, the nut 2 is pressed toward the metal member 1 (i.e., upward) by the pressure cylinder 7. This causes the tip surface 241 of the protrusion 24 of the nut 2 to come into close contact with the welding surface 11 of the metal member 1. As described above, since the metal member 1 is fixed by the material fixing clamp 3, the clamp receiver 4, and the clamper 5, even if the force F pressing the nut 2 is applied to the metal member 1 by the pressure cylinder 7, the metal member 1 is prevented from floating up.

[0031] Next, a beam L is irradiated from the laser irradiator 8 toward the portion of the metal member 1 that is in close contact with the welding surface 11 of the nut 2 from the non-welding surface 12 side, and the metal member 1 and the nut 2 are laser-welded. In this embodiment, the beam L is irradiated toward the protrusion 24 of the nut 2 from the non-welding surface 12 side. Specifically, the beam L hits the non-welding surface 12 of the metal member 1, and the metal member 1 is first melted by the heat of the beam L. Thereafter, the melting by the heat of the beam L further progresses, and the protrusion 24 is melted. Then, the melted portion of the metal member 1 and the protrusion 24 is cooled, and a welded portion 24A is formed.

[0032] In this embodiment, one protrusion 24 is selected from the four protrusions 24, and the beam L is first irradiated toward the first selected protrusion 24. Thereafter, the other protrusions 24 are selected in order in a clockwise direction, and the beam L is irradiated toward each protrusion 24 in order. As a result, in this embodiment, four welded parts 24A are formed.

[0033] The beam L moves linearly in the irradiation area of ​​the beam L along the welding direction shown by the arrow in FIG. 2, forming the welded portion 24A. In the example shown in FIG. 2, the welding direction is a direction along the first end face 22 of the nut 2 and is parallel to the linear portion of the outer edge of the tip face 241 of each protrusion 24. In the following description, the longest length of the protrusion 24 of the nut 2 along the welding direction is referred to as the longest width W of the protrusion 24. In the example shown in FIG. 2, the longest width W is the diameter of a semicircle drawn by the outer edge of the tip face 241 of the protrusion 24. For example, the longest width W of the protrusion 24 is about 2 mm.

[0034] In this embodiment, the beam L is irradiated in focus to the metal member 1, which is the object to be irradiated with the beam L. Therefore, as shown in FIG. 3, the minimum intersection position L1 of the beam L is the position where the protrusion 24 is in close contact with the welding surface 11 of the metal member 1. The minimum intersection position of the beam is not limited to the position where the protrusion 24 is in close contact with the welding surface 11, and may be any position along the thickness direction of the metal member 1. For example, the minimum intersection position of the beam may be on the non-welding surface 12 of the metal member 1 when the beam is irradiated in an out-of-focus manner to the metal member 1. The beam diameter d of the beam L is set to 0.3 mm or more. In this embodiment, the beam diameter d is 0.9 times or more the maximum width W of the protrusion 24. It is preferable that the beam diameter d is approximately the same as the maximum width W of the protrusion 24. Specifically, when the maximum width W of the protrusion 24 is approximately 2 mm, the beam diameter d is set to approximately 1.8 mm, and the maximum width W and the beam diameter d are approximately the same.

[0035] [2. Effects] According to the embodiment described above in detail, the following effects can be obtained. (2a) In this embodiment, the nut 2 has a protrusion 24, and the beam L is irradiated toward the protrusion 24, which is a portion of the nut 2 that abuts against the welding surface 11 of the metal member 1. Therefore, in the configuration of this embodiment, welding defects are less likely to occur compared to when the beam L is irradiated toward the gap between the nut 2 and the welding surface 11. As a result, the joining strength between the nut 2 and the metal member 1 can be improved.

[0036] (2b) In this embodiment, the nut 2 is pressed toward the metal member 1 by the pressure cylinder 7. As a result, the beam L is irradiated toward the protrusion 24 of the nut 2 in a state where the protrusion 24 is in close contact with the welding surface 11 of the metal member 1, and the welded portion 24A is formed. Therefore, a gap is unlikely to occur between the welded portion 24A and the welding surface 11. Also, even if a force in a direction that tilts the nut 2 occurs during laser welding due to thermal expansion or thermal contraction of the portion irradiated with the beam L, the tilt is suppressed by the above-mentioned pressing, so that welding defects are unlikely to occur. Therefore, the joining strength between the nut 2 and the metal member 1 can be further improved.

[0037] (2c) In this embodiment, the beam L is irradiated from the non-welding surface 12 side of the metal member 1 toward the nut 2. Here, for example, when the metal member 1 is pressed to press the nut 2 against the welding surface 11, it is necessary to press the positions of the metal member 1 where the nut 2 is not placed, for example, the first end 14 and the second end 15 of the metal member 1, so as not to interfere with the beam L. In this case, if the pressing force applied to the metal member 1 is increased, problems such as bending of the metal member 1 may occur. On the other hand, when the nut 2 is pressed against the welding surface 11 by the pressure cylinder 7 as in this embodiment, the entire nut 2 can be pressed without interfering with the beam L. For this reason, it is easy to apply a large pressing force to the nut 2. As a result, it is easy to improve the degree of adhesion between the protrusion 24 of the nut 2 and the welding surface 11.

[0038] (2d) In this embodiment, the beam diameter d is approximately the same as the maximum width W of the protrusion 24. This prevents deep holes in the welded portion 24A or holes penetrating the welded portion 24A, which are likely to occur during laser welding due to a small beam diameter. If holes occur in the welded portion, the weld strength is likely to decrease. Therefore, the protrusion 24 can be appropriately melted while preventing a decrease in the joint strength of the welded portion 24A.

[0039] (2e) For example, when projection welding is used to weld a nut to a metal member made of a thin ultra-high tensile material, the distance between the electrode used for projection welding and the protrusion becomes close. Therefore, heat applied to the protrusion is likely to escape, and stress due to thermal contraction or the like is likely to concentrate on the welded portion, and the joint strength between the nut and the metal member is likely to become unstable. On the other hand, as in this embodiment, when the nut 2 is laser welded to the metal member 1 made of a thin ultra-high tensile material, heat applied to the protrusion 24 is unlikely to escape, and stress due to thermal contraction or the like is unlikely to concentrate on the welded portion 24A. Therefore, the joint strength between the nut 2 and the metal member 1 is likely to be stable. In addition, the average push-in peel load of the nut 2 against the metal member 1 is likely to be high. As a result, the quality of the welded member 100 can be improved.

[0040] 3. Other embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take various forms.

[0041] (3a) In the above embodiment, the metal member 1 is a plate-shaped member, but the shape of the metal member is not limited to this. For example, the metal member may have various shapes having a plate-shaped portion that is a portion with a thin plate thickness. In a configuration in which the metal member has a plate-shaped portion, the nut 2 is welded to the welding surface of the plate-shaped portion.

[0042] (3b) In the above embodiment, the nut 2 is pressed toward the metal member 1 to bring the protrusion 24 of the nut 2 into close contact with the welding surface 11 of the metal member 1, but the method of bringing the protrusion into close contact with the welding surface is not limited to this. For example, the laser welding device may include a device that presses the metal member 1 toward the nut 2, and both the nut 2 and the metal member 1 may be pressed in a direction in which they come into close contact with each other. Also, for example, with the position of the nut 2 fixed, only the metal member 1 may be pressed toward the nut 2.

[0043] (3c) In the above embodiment, the nut 2 has the protrusion 24, but the nut does not have to have a protrusion. In a configuration in which the nut does not have a protrusion, the beam L is irradiated toward a specific location to be welded among the portion of the nut that is in close contact with the welding surface.

[0044] (3d) In the above embodiment, the beam diameter d is approximately the same as the maximum width W of the protrusion 24, but the size of the beam diameter is not limited to this. For example, the beam diameter may be smaller than the maximum width W. Specifically, when the maximum width W is approximately 2 mm, for example, the beam diameter may be smaller than the maximum width W and 0.3 mm or more. Also, for example, the beam diameter may be larger than the maximum width W.

[0045] (3e) In the above embodiment, a configuration in which the metal member 1 is made of ultra-high tensile material is described as an example. However, the type of metal of the metal member is not limited to this, and the metal member may be made of other metals.

[0046] (3f) In the above embodiment, the four protrusions 24 are welded one by one in a clockwise direction. However, for example, a plurality of protrusions may be welded one by one in a counterclockwise direction. Also, for example, after welding one selected protrusion, another protrusion located diagonally opposite the selected protrusion may be selected and welded. Also, for example, a plurality of protrusions may be welded simultaneously by splitting one beam into a plurality of beams or by using a plurality of beam sources for irradiating beams.

[0047] (3g) In the above embodiment, the nut holding portion 6 has the holding claw 62. However, for example, if the laser welding device is configured to include a camera, a sensor, or the like and to recognize the position of the protrusion 24 using the camera, sensor, or the like, the nut holding portion does not need to have a holding claw. If the nut 2 is placed on a nut holding portion that does not have a holding claw, the position of the protrusion 24 is likely to shift. However, if the laser welding device is configured as described above, even if the position of the protrusion 24 shifts, the irradiation position of the beam can be corrected and the beam can be irradiated toward the protrusion 24.

[0048] (3h) In the above embodiment, the irradiation area of ​​the beam L moves linearly. However, for example, the irradiation area of ​​the beam L may move in a curved line or in a circle.

[0049] (3i) During laser welding, a bolt or the like may be inserted into the screw hole 21 of the nut 2 to prevent spatter from adhering to the non-welded surface 12 of the nut 2. Also, a device for blowing air may be provided to the laser welding device to prevent spatter from adhering to the non-welded surface 12 of the nut 2 by the air.

[0050] (3j) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Also, part of the configuration of the above embodiments may be omitted. Also, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments.

[0051] [4. Technical Concepts Disclosed in This Specification] [Item 1] A method for manufacturing a welded component in which a metal member and a nut are welded, comprising the steps of: The nut is brought into contact with a welding surface of a plate-shaped portion of the metal member, and at least one of the plate-shaped portion and the nut is pressed to bring the nut into close contact with the welding surface; A beam is irradiated from an opposite side of the welding surface of the plate-shaped portion toward a portion of the nut that is in close contact with the welding surface, and the metal member and the nut are laser-welded; A method for manufacturing a welded member comprising the steps of:

[0052] [Item 2] A method for producing a welded component according to item 1, The nut is pressed against the welding surface to be in close contact with the welding surface.

[0053] [Item 3] A method for producing a welded member according to item 1 or 2, The nut has a protrusion that protrudes toward the welding surface and abuts against the welding surface, The method for manufacturing a welded member, wherein the beam is irradiated toward the protrusion.

[0054] [Item 4] A method for producing a welded component according to item 3, a beam diameter of the beam at a minimum intersection position where an area of ​​an intersection surface included in an intersection region where the plate-like portion and a virtual irradiation region of the beam intersect is minimum is 0.9 times or more the maximum width of the protrusion, A method for manufacturing a welded member, wherein the maximum width is the maximum length of the protrusion along a direction in which the area irradiated with the beam moves during the laser welding.

[0055] [Item 5] A method for producing a welded member according to any one of items 1 to 4, The method for manufacturing a welded component, wherein the metal component is made of ultra-high tensile steel. [Explanation of symbols]

[0056] 1...metal member, 2...nut, 3...material fixing clamp, 4...clamp receiver, 5...clamper, 6...nut holding portion, 7...pressurizing cylinder, 8...laser irradiator, 11...welding surface, 12...non-welding surface, 13...hole portion, 14...first end, 15...second end, 21...screw hole, 21A...opening, 22...first end face, 23...second end face, 24...projection portion, 24A...welding portion, 25...side surface, 61...base, 62...holding claw, 100...welding member, 200...laser welding device, 241...tip surface, 611...contact surface, A...center axis, F...force, L...beam, L1...minimum intersection position, M1, M2...irradiated object, R1, R2...intersection area.

Claims

1. A method for manufacturing a welded component in which a metal member and a nut are welded, comprising the steps of: The nut is brought into contact with a welding surface of a plate-shaped portion of the metal member, and at least one of the plate-shaped portion and the nut is pressed to bring the nut into close contact with the welding surface; A beam is irradiated from an opposite side of the welding surface of the plate-shaped portion toward a portion of the nut that is in close contact with the welding surface, and the metal member and the nut are laser-welded; A method for manufacturing a welded member comprising the steps of:

2. A method for manufacturing a welded member according to claim 1, The nut is pressed against the welding surface to be in close contact with the welding surface.

3. A method for manufacturing a welded member according to claim 1 or 2, The nut has a protrusion that protrudes toward the welding surface and abuts against the welding surface, The method for manufacturing a welded member, wherein the beam is irradiated toward the protrusion.

4. A method for manufacturing a welded member according to claim 3, a beam diameter of the beam at a minimum intersection position where an area of ​​an intersection surface included in an intersection region where the plate-like portion and a virtual irradiation region of the beam intersect is minimum is 0.9 times or more the maximum width of the protrusion, A method for manufacturing a welded member, wherein the maximum width is the maximum length of the protrusion along a direction in which the area irradiated with the beam moves during the laser welding.

5. A method for manufacturing a welded member according to claim 1 or 2, The method for manufacturing a welded component, wherein the metal component is made of ultra-high tensile steel.

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