JP6614204B2 - Method of joining metal member and resin member and metal member or resin member used in the method - Google Patents

Description

  The present invention relates to a method for joining a metal member and a resin member, and a metal member or a resin member used in the method.

  Conventionally, weight reduction has been demanded in the fields of automobiles, railway vehicles, aircraft, and the like. For example, in the field of automobiles, the use of high-tensile materials has made it possible to reduce the thickness of steel sheets, or aluminum alloy materials have been used as substitutes for steel materials, and the use of resin materials has also advanced. In this field, the development of joining technology for metal members and resin members is important not only from the viewpoint of weight reduction, but also from the viewpoint of realizing higher strength and higher rigidity of the joining member and improved productivity. .

  Up to now, as a joining method between a metal member and a resin member, a friction stir welding (FSW) method, a resistance heating joining method (electric heating joining method), an induction heating joining method, an ultrasonic heating joining method, etc. In addition, a hot-pressure bonding method in which heating is performed while applying pressure is known (for example, Patent Documents 1 and 2).

  On the other hand, in the hot-pressure bonding method, a technique for forming a reservoir groove for allowing molten resin to flow into at least one of a resin member or a metal member is disclosed (Patent Document 3).

JP 2008-023583 A JP 2011-088197 A JP-A-2015-131444

  The inventors of the present invention ensure sufficient bonding strength when a third component such as an adhesive and a sealing material is interposed between the metal member and the resin member by the conventional hot-pressure bonding method. I found it difficult to do.

  For example, in the friction stir welding method, as shown in FIG. 7A, the metal member 211 and the resin member 212 having the adhesive layer 203 are overlapped, and the rotary tool 216 is pushed into the metal member 211. Next, as shown in FIG. 7B, the rotation tool 216 is further pushed in, and the rotation operation is continued. As a result, sufficient bonding strength was not obtained. Since the adhesive derived from the adhesive layer 203 remains between the metal member 211 and the resin member 212 and inhibits the bonding between them, it is considered that sufficient bonding strength cannot be obtained.

  Also in other hot-pressure bonding methods other than the friction stir welding method, if the metal member and the resin member are overlapped and an adhesive is interposed between them, sufficient bonding strength cannot be obtained.

  The present invention relates to a method for joining a metal member and a resin member, which can obtain better joint strength even when an adhesive is interposed between the metal member and the resin member, and the metal member used in the method. Alternatively, an object is to provide a resin member.

The present invention
The metal member and the resin member are overlapped, and with the adhesive interposed therebetween, the resin member is melted by applying pressure and heat from the metal member side to join the metal member and the resin member. It is a joining method of a metal member and a resin member by a hot-pressure joining method,
At least one member of the metal member or the resin member has a convex portion on the surface facing the other member, and the molten resin is melted by melting the resin member between the convex portion and the other member. The present invention relates to a method for joining a metal member and a resin member, in which, as viewed from above, the fluid flows together with the adhesive from the convex portion toward the outer periphery thereof.

  The present invention also relates to a metal member or a resin member used in the joining method.

  According to the bonding method of the present invention, in any hot-pressure bonding method, even when an adhesive is interposed between the metal member and the resin member, better bonding strength can be obtained.

It is a schematic diagram which shows an example of a part of friction stir welding apparatus suitable for the joining method of the metal member and resin member concerning this invention. It is a schematic sectional drawing for demonstrating the preheating process in the joining method which concerns on one embodiment of this invention. It is a schematic sectional drawing for demonstrating the indentation stirring process in the joining method which concerns on one embodiment of this invention. It is a schematic sectional drawing for demonstrating the pushing stirring process, stirring maintenance process, and holding process in the joining method which concerns on one embodiment of this invention. It is a schematic sectional drawing for demonstrating the preheating process in the joining method which concerns on one embodiment of this invention. It is a schematic sectional drawing for demonstrating the indentation stirring process in the joining method which concerns on one embodiment of this invention. It is a schematic sectional drawing for demonstrating the pushing stirring process, stirring maintenance process, and holding process in the joining method which concerns on one embodiment of this invention. The upper figure is a schematic top view of the resin member shown in FIG. 1, and the lower figure is a schematic sectional view when the MM section of the upper figure is viewed in the direction of the arrow. The upper figure is a schematic top view of an example of a resin member used in the bonding method of the present invention, and the lower figure is a schematic sectional view when the MM section of the upper figure is viewed in the direction of the arrow. The upper figure is a schematic top view of an example of a resin member used in the bonding method of the present invention, and the lower figure is a schematic sectional view when the MM section of the upper figure is viewed in the direction of the arrow. The upper figure is a schematic top view of an example of a resin member used in the bonding method of the present invention, and the lower figure is a schematic sectional view when the MM section of the upper figure is viewed in the direction of the arrow. It is an enlarged view near the front-end | tip part of an example of the rotary tool used for the joining method of this invention. It is a schematic plan view of the resin member obtained by forcibly peeling the metal member from the joined body obtained by the joining method according to one embodiment of the present invention. It is a schematic sectional drawing for demonstrating the preheating process in the joining method of the metal member and resin member in a prior art. It is a schematic sectional drawing for demonstrating the pushing stirring process in the joining state of the metal member and resin member in a prior art, a stirring maintenance process, and a holding process.

  The bonding method of the present invention softens the resin member by superimposing the metal member and the resin member and applying pressure and heat from the metal member side, preferably locally from the metal member side. The present invention relates to a hot-pressure joining method for joining a metal member and a resin member. The joining method employed in the joining method of the present invention is not particularly limited as long as it is a method of heating while applying pressure. For example, a friction stir welding method, a resistance heating joining method (electric heating joining method), induction A heat bonding method, an ultrasonic heat bonding method, or the like may be used. Among these, the friction stir welding method is preferably employed.

In the friction stir welding method, as will be described in detail later, frictional heat generated by overlapping a metal member and a resin member and pressing the metal member while rotating a rotary tool as a pressing member is used. Then, the metal member and the resin member are joined.
In the resistance heating joining method, the metal member and the resin member are joined using heat generated by passing an electric current through the metal member while being pressed from the metal member side by an electrode (pressing member).
The induction heating joining method is a method in which an induction current is generated in a metal member by electromagnetic induction while pressing from the metal member side by a pressing member, and heat generated by the current is used. The metal member and the resin member are joined.
In the ultrasonic heating joining method, the metal member and the resin member are performed by using frictional heat generated by micro-slip between the plates by applying ultrasonic waves while applying pressure from the metal member side by the pressing member.

  Hereinafter, the joining method of the present invention employing the friction stir welding method will be described with reference to FIGS. With reference to the following description of the friction stir welding method, it is apparent that the same actions and effects as those in the friction stir welding method can be obtained in other hot-pressure welding methods. For example, also in other hot-pressure bonding methods, at least one member of a metal member or a resin member has a convex portion on the surface facing the other member, and between the convex portion and the other member, The resin member is melted. Thereby, molten resin can be made to flow with the adhesive toward the outer peripheral side from the convex part in a plan view. As a result, better bonding strength can be obtained. 1 to 6, common reference numerals indicate the same members, parts, dimensions, or regions unless otherwise specified. The plan view is a plan view when viewed from above in the axial direction of a pressing member (for example, a rotating tool described later). The cross-sectional view is a cross-sectional view parallel to the axial direction of a pressing member (for example, a rotating tool described later).

[Method of joining metal member and resin member by friction stir welding method]
FIG. 1 is a diagram schematically showing an example of a part of a friction stir welding apparatus suitable for carrying out the joining method of the present invention. A friction stir welding apparatus 1 shown in FIG. 1 is configured as a device for friction stir welding a metal member 11 and a resin member 12, and includes a columnar rotary tool 16 as a pressing member. As shown in the figure, the rotary tool 16 is applied to the workpiece 10 with the metal member 11 on the top and the resin member 12 on the bottom, by a drive source (not shown) as indicated by an arrow A1. While rotating around the central axis X (see FIG. 5), the metal member 11 is pressed downward in the pressing region P (scheduled pressing region) as indicated by an arrow A2. Frictional heat is generated by the pressing of the rotary tool 16 and is conducted to the resin member 12.

  Below the rotary tool 16, a cylindrical receiving member 17 having the same diameter as the rotary tool 16 or a larger diameter than the rotary tool 16 is arranged coaxially with the rotary tool 16. The receiving member 17 is moved upward with respect to the work 10 as shown by an arrow A3 by a driving source (not shown). The upper end surface of the receiving member 17 abuts on the lower surface of the workpiece 10 (more specifically, the lower surface of the resin member 12) by the time the rotating tool 16 starts pressing the workpiece 10 at the latest. The support 17 sandwiches the workpiece 10 between the rotary tool 16 and supports the workpiece 10 from below against the pressing force during a pressing period by the rotary tool 16, that is, during friction stir welding. Note that the receiving tool 17 does not necessarily have to be moved in the direction of the arrow A3, and a method of moving the rotary tool 16 in the direction of the arrow A2 after placing the workpiece 10 on the receiving tool 17 can also be adopted.

  The friction stir welding apparatus 1 is attached to a drive control device (not shown) composed of an articulated robot or the like. The coordinate positions of the rotary tool 16 and the receiving tool 17, the rotational speed (rpm) of the rotary tool 16, the pressure (N), the pressurization time (second), and the like are appropriately controlled by the drive control device. Although not shown in FIG. 1, the friction stir welding apparatus 1 uses a spacer, a clamp, or the like for fixing the work 10 in advance and preventing the metal member 11 from floating when the rotary tool 16 is pressed. A jig is provided.

In the present invention, at least one of the metal member 11 or the resin member 12 has a convex portion on the surface facing the other member.
For example, as shown in FIG. 2A, the resin member 12 has a convex portion 122 on the surface 120 facing the metal member 11, and the metal member 11 has a convex portion on the surface 110 facing the resin member 12. Instead, it may have a planar shape (hereinafter referred to as “mode 1”).
For example, as shown in FIG. 3A, the metal member 11 has a convex portion 112 on the surface 110 facing the resin member 12, and the resin member 12 has a convex portion on the surface 120 facing the metal member 11. Instead, it may have a planar shape (hereinafter referred to as “aspect 2”).
Further, for example, the resin member 12 has a convex portion 122 on the surface 120 facing the metal member 11 as shown in FIG. 2A, and the metal member 11 is formed on the surface 110 facing the resin member 12 as shown in FIG. 3A. The convex portion 112 may be included (hereinafter referred to as “mode 3”).

  In the present invention, since at least one of the metal member 11 or the resin member 12 has a convex portion, pressure and heat are concentrated between the convex portion and the other member. For this reason, when the resin member is melted, the melted resin flows from the convex portion toward the outer peripheral side in a plan view. The fact that the molten resin flows from the convex portion toward the outer peripheral side in a plan view means that when the molten resin is observed from the axial direction of the rotary tool 16, the molten resin is radially centered on the convex portion (that is, in any radial direction). ) Means moving. At this time, the flow rate (moving speed) of the molten resin is faster than in the case where there is no convex portion. This is considered to be based on the fact that the amount of the molten resin is increased due to the presence of the convex portion and that the flow direction is easily determined in the radial direction.

  That is, for example, in the first aspect, as shown in FIGS. 2A to 2C, the convex portion 122 is melted from the top portion 1220, that is, the melting start point of the resin member is local, and the flow direction is the top portion. It becomes easy to determine in the radial direction from 1220. In addition, the amount of molten resin increases by the amount corresponding to the convex portion. As a result, in the case where the resin member 12 has the convex portion 122, the flow rate of the molten resin is faster than in the case where the convex portion does not exist.

  Further, for example, in the second aspect, as shown in FIGS. 3A to 3C, the resin member 12 is melted from the approaching portion 1250 at the top of the convex portion, that is, the melting start point of the resin member is local, and thus the flow direction Is easily determined in the radial direction from the vicinity. Moreover, the amount of the molten resin is increased by the amount of the molten resin pushed away by the convex portion. As a result, in the case where the metal member 11 has the convex portion 112, the flow rate of the molten resin is faster than in the case where the convex portion does not exist. The approaching portion 1250 at the top of the convex portion of the resin member 12 means a portion of the resin member 12 where the convex portion 112 of the metal member 11 is closest.

  For example, in aspect 3, due to the synergistic effect of aspect 1 and aspect 2 described above, the flow rate of the molten resin is further increased compared to the case where no convex portion is present.

  When the flow rate of the molten resin becomes higher in this way, the adhesive 3 interposed between the metal member 11 and the resin member 12 follows the flow of the molten resin as compared with the case where no convex portion exists. Therefore, it becomes easy to flow and move radially together with the molten resin. As a result, it is considered that the adhesive hardly remains in the bonding region between the metal member and the resin member, and better bonding strength can be obtained. In FIG. 2A, the adhesive 3 is formed not only on the flat surface portion of the resin member 12 but also on the convex portion 122 (particularly the top portion) as an adhesive layer. Due to the melting of the resin, it is easily broken and becomes the starting point for the movement of the molten resin. In FIG. 3A, the adhesive 3 is formed as an adhesive layer on the planar portion of the resin member 12 and is also formed on the contact portion of the resin member 12 with the convex portion 112 of the metal member 11. And the subsequent melting of the resin, it is easily broken and becomes the starting point for the movement of the molten resin.

  From the viewpoint of further improving the bonding strength by increasing the speed of the molten resin flow, at least the resin member 12 preferably has a convex portion. In the preferable embodiment, the above-described aspects 1 and 3 are included. In view of the balance between the same viewpoint and the viewpoint of manufacturing cost, the first aspect is more preferable.

  In FIGS. 2A to 2C and FIGS. 3A to 3C, the adhesive 3 is formed as an adhesive layer on the surface 120 facing the metal member 11 in the resin member 12, but at least the metal member 11 or the resin member 12 is used. What is necessary is just to be formed in the opposing surface in one side. For example, the adhesive 3 may be provided in a layer form on the facing surface 110 of the metal member 11 facing the resin member 12, or on both the facing surface 120 of the resin member 12 and the facing surface 110 of the metal member 11. It may be provided in layer form. Further, for example, the adhesive 3 is not formed on any of the opposing surfaces of the metal member 11 and the resin member 12, and independently of these opposing surfaces, the metal member 11 and the resin member 12 are in the form of an adhesive sheet. It may be interposed between them. In addition, for example, the adhesive 3 is provided in a bead shape on the opposing surface of at least one of the metal member 11 or the resin member 12, and a layer form is formed between the metal member 11 and the resin member 12 due to the approach of both members at the time of joining. You may come to have. The adhesive 3 is provided in a layer form only on the surface 120 facing the metal member 11 in the resin member 12 from the viewpoint of further improving the bonding strength by speeding up the flow of the molten resin, or in the resin member 12. It is preferably provided in a bead shape only on the facing surface 120 and has a layer form due to the proximity of both members during joining.

  When the adhesive 3 is provided in a layer form on the resin member 12 having a convex portion, the adhesive (layer) 3 is, as shown in FIG. 2A, on the surface 120 facing the metal member 11 in the resin member 12, You may form not only a plane part but a convex part. The adhesive (layer) 3 is preferably formed in a region other than the top of the convex portion 122 on the facing surface 120 of the resin member 12 from the viewpoint of further improving the bonding strength by increasing the speed of the molten resin flow. From the same viewpoint, the adhesive (layer) 3 is preferably formed in a region other than the convex portion 122 on the facing surface 120 of the resin member 12. Such adjustment of the formation region can be easily performed by computer control in the coating apparatus when the adhesive (layer) 3 is formed.

  The adhesive 3 conventionally includes any adhesive that can contribute to the adhesion between the metal member 11 and the resin member 12. Therefore, the adhesive 3 is used in a concept including not only a material used as an adhesive but also a sealing material used for sealing between the metal member 11 and the resin member 12. Examples of the material constituting the adhesive 3 include thermosetting resins such as epoxy resins, urethane resins, acrylic resins, and mixtures thereof, and heat such as synthetic rubber resins, polyvinyl chloride resins, and mixtures thereof. A plastic resin is mentioned.

  When the adhesive 3 is provided in the form of a layer, the adhesive (layer) 3 may be formed by applying the above-described constituent material or an organic solvent solution thereof in a layer form and thermally curing as desired. The adhesive (layer) 3 may be formed by drying after application.

  When the adhesive 3 is provided in a bead shape, the adhesive 3 may be provided by applying the constituent material or the organic solvent solution thereof in a bead shape. You may dry after application | coating.

The amount of the adhesive 3 applied is usually such that the thickness of the adhesive layer after bonding is 0.1 to 1.5 mm, particularly 0.2 to 0.5 mm. The application amount of the adhesive 3 is usually 10 to 500 mg / m ² , and preferably 50 to 300 mg / m ² from the viewpoint of further improving the bonding strength by increasing the speed of the adhesive and the molten resin flow.

  The shape and size of the convex portion 112 of the metal member 11 and the convex portion 122 of the resin member 12 are common. The convex portion 112 of the metal member 11 is usually integrally formed from the same material as the main body portion of the metal member 11. The convex portion 122 of the resin member 12 is usually integrally formed from the same material as that of the main body portion of the resin member 12.

  The convex portion is a local raised portion. The local bulging portion means that the bulging portion does not bulge around the ridge and the bulging portion exists in a dot shape. Examples of the shape of the convex portion include a corrugated raised shape, a corrugated raised trapezoidal shape, a cone shape, and a truncated cone shape.

  As shown in FIG. 4A, the corrugated ridge shape is a shape that is gently and curvedly bulged from the edge of the ridge in a cross-sectional view (for example, the lower diagram in FIG. 4A). The upper view of FIG. 4A shows the plan view shape of the corrugated ridge shape.

  The corrugated raised trapezoid shape is a shape having a top surface at the top of the corrugated raised shape.

  As shown in FIGS. 4B and 4C, the cone shape is a shape that linearly bulges from the edge of the bulged portion in a cross-sectional view (for example, the lower views of FIGS. 4B and 4C). The cone shape includes polygonal shapes such as a cone shape as shown in FIG. 4B and a quadrangular pyramid shape as shown in FIG. 4C. The upper diagrams of FIGS. 4B and 4C show the plan view shapes of a cone shape and a quadrangular pyramid shape, respectively.

  The frustum shape is a shape having a top surface at the top of the above-mentioned cone shape. For example, as shown in FIG. 4D, the top surface 123 is shown in a cross-sectional view (for example, the lower diagram in FIG. 4D). The upper diagram in FIG. 4D shows a plan view shape of a truncated cone shape.

In the convex portion, from the viewpoint of further improving the bonding strength by increasing the flow rate of the molten resin, the area S1 (mm ² ) of the top portion (top surface) of the convex portion and the pressing area S2 by the pressing member (rotating tool 16). (Mm ² ) preferably satisfies the following relational expression (1), more preferably satisfies the relational expression (2), more preferably satisfies the relational expression (3), and satisfies the relational expression (4). Is more preferable.
S1 / S2 ≦ 0.8 (1)
S1 / S2 ≦ 0.6 (2)
S1 / S2 ≦ 0.4 (3)
S1 / S2 ≦ 0.2 (4)

Apex of the convex portion (top surface) of the area S1 is usually, 60 mm ² or less, in particular at 0～60Mm ^2, preferably 0 to 50 mm ^2, more preferably 0～30Mm ^2, more preferably 0~15mm ² . The area S1 of the top (top surface) when the convex portion has a corrugated ridge shape or a cone shape is 0 (mm ² ).

The pressing area S2 by the pressing member (rotating tool 16) is, for example, the area of the region on the metal member 11 to which heat and pressure are directly applied by pressing by the rotating tool (pressing member) 16, specifically, It is the area of the press area | region P shown by the oblique line in FIG. The area S2 is usually 28 to 710 mm ² , preferably 50 to 205 mm ² .

In the convex portion, the maximum width W1 (mm) of the convex portion and the pressing member are selected from the viewpoint of further improvement of the bonding strength by increasing the speed of the molten resin flow and construction on a limited area such as a flange. The maximum width (diameter) D1 (mm) (see FIGS. 4A to 4D) of the (rotating tool 16) preferably satisfies the following relational expression (1), more preferably satisfies the relational expression (2). It is more preferable that the expression (3) is satisfied, and it is most preferable that the relational expression (4) is satisfied. The maximum widths W1 and D1 are the maximum widths in cross-sectional view.
1.0 ≦ W1 / D1 ≦ 10.0 (1)
1.5 ≦ W1 / D1 ≦ 5.0 (2)
1.5 ≦ W1 / D1 ≦ 4.0 (3)
1.5 ≦ W1 / D1 ≦ 2.5 (4)

The maximum width W1 of the convex portion is usually 5 to 50 mm, and preferably 5 to 30 mm from the viewpoint of further improving the bonding strength by increasing the speed of the molten resin flow. From the viewpoint of further improvement and construction on a limited area such as a flange, the thickness is more preferably 10 to 45 mm ² , and further preferably 20 to 30 mm ² .

  The maximum width (diameter) D1 of the pressing member (rotating tool 16) is usually in the same range as the diameter of the rotating tool 16 described in detail later.

  The height H of the convex portion (see FIGS. 4A to 4D) is usually 0.5 to 6 mm, and preferably 0.5 to 4 mm from the viewpoint of further improving the bonding strength by increasing the flow rate of the molten resin. is there.

(1) Resin member The resin member 12 includes the main body portion 121 and the convex portion 122 when the convex portion 122 is provided, and includes the main body portion 121 when the convex member 122 is not provided. When the resin member 12 has the convex part 122 and the main body part 121 and the convex part 122 are made of the same material, it is preferable that the main body part 121 and the convex part 122 are integrally formed. That is, when the resin member 12 is manufactured by any known melt molding method such as an injection molding method, a press molding method, an extrusion molding method, a pultrusion molding method, or an autoclave molding method, the molding surface of a mold to be used is used. It is preferable that the main body 121 and the convex portion 122 are integrally formed by transferring. The present invention does not prevent the main body part 121 and the convex part 122 from being individually molded and bonded together by any bonding method such as an adhesive bonding method, but strong bonding and ease of manufacture. From this point of view, as described above, it is preferable to integrally mold the main body 121 and the convex portion 122 by transferring the mold forming surface in the melt molding method. Even when the resin member 12 does not have the convex portion 122, the resin member 12 can be manufactured by the same melt molding method as described above.

  The resin member 12, that is, the main body 121 and the convex portion 122 are made of a polymer and other desired additives. As the polymer, a thermoplastic polymer may be used, or a thermosetting polymer may be used.

As the thermoplastic polymer constituting the resin member 12, any polymer having thermoplasticity can be used. Of these, thermoplastic polymers used in the field of automobiles are preferably used. Specific examples of such thermoplastic polymers include, for example, the following polymers and mixtures thereof:
Polyolefin resins such as polyethylene and polypropylene;
Polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polylactic acid (PLA));
Polyacrylate resins such as polymethyl methacrylate resin (PMMA);
Polyether resins such as polyether ether ketone (PEEK) and polyphenylene ether (PPE);
Polyacetal (POM);
Polyphenylene sulfide (PPS);
PA6, PA66, PA11, PA12, PA6T, PA9T, MXD6 and other polyamide-based resins (PA);
Polycarbonate resin (PC);
Polyurethane resin;
A fluoropolymer resin; and a liquid crystal polymer (LCP).

  The molecular weight of the thermoplastic polymer is not particularly limited as long as it can be softened and melted at the time of joining. Usually, a thermoplastic polymer having a melt flow rate (MFR) of 2 to 200, preferably 2 to 55, is used.

  In the present specification, MFR is a melt flow rate, and a value (g / 10 minutes) measured at 230 ° C. based on JIS K7210 is used.

As the thermosetting polymer, a thermosetting polymer used in the field of automobiles is preferably used. Specific examples of such thermosetting polymers include, for example, the following polymers and mixtures thereof:
Epoxy resin (EP);
Phenolic resin (PF);
Unsaturated polyester resin (UP);
Melamine resin (MF);
Polyurethane (PUR).

  Examples of the additive contained in the resin member 12 include fillers such as talc, and reinforcing fibers such as carbon fibers and glass fibers.

  As described above, the main body portion 121 of the resin member 12 has been described as having a substantially flat plate shape as a whole, but is not limited to this, and as long as at least a portion immediately below the convex portion has a substantially flat plate shape, You may have a shape. The thickness t of the resin member 12 is not particularly limited, and is usually 1 mm or more, particularly 1 to 20 mm.

(2) Metal member The metal member 11 includes the main body portion 111 and the convex portion 112 when the convex portion 112 is provided, and includes the main body portion 111 when the convex portion 112 is not provided. When the metal member 11 has the convex part 112 and the main body part 111 and the convex part 112 are made of the same material, it is preferable that the main body part 111 and the convex part 112 are integrally formed. That is, when the metal member 11 is manufactured by any known molding method such as die casting, for example, the main body portion 111 and the convex portion 112 are integrally formed by transferring the molding surface of the mold used. It is preferable to mold. The present invention does not prevent the main body portion 111 and the convex portion 112 from being individually molded and bonded together by any bonding method such as welding, but from the viewpoint of strong bonding and ease of manufacture. As described above, it is preferable that the main body portion 111 and the convex portion 112 are integrally formed by transferring the mold forming surface in the metal melt forming method. Even when the metal member 11 does not have the convex portion 112, the metal member 11 can be manufactured by the same melt molding method as described above.

  Although the metal plate 11 has a substantially flat plate shape as the overall shape of the main body portion 111, the present invention is not limited to this, and any shape can be used as long as at least a portion immediately above the convex portion has a substantially flat plate shape. You may do it. The thickness T of the metal member 11 is not particularly limited, and is usually about 0.6 to 3.0 mm.

As the metal constituting the metal member 11, any metal having a melting point higher than that of the polymer constituting the resin member 12 can be used. Among these, the following metals and alloys used in the automotive field are preferably used:
Aluminum and aluminum alloys such as 5000 series and 6000 series;
Steel; mild steel, high-strength steel, etc. Magnesium and its alloys;
Titanium and its alloys.

(3) Rotating Tool FIG. 5 is an enlarged view of the vicinity of the tip of the rotating tool 16. In FIG. 5, the right half shows the appearance of the rotary tool 16, and the left half shows a cross section. As shown in FIG. 5, the columnar rotary tool 16 has a pin portion 16 a and a shoulder surface 16 b at the tip portion (lower end portion in FIG. 5). The shoulder surface 16 b is a circular tip surface of the rotary tool 16. The rotary tool 16 has a pin portion 16a on the shoulder surface 16b. The pin portion 16a is a cylindrical portion having a smaller diameter than the shoulder surface 16b, which protrudes outward (downward in FIG. 9) from the circular tip surface of the rotary tool 16 on the central axis X of the rotary tool 16. is there. The pin portion 16a is for positioning the rotating tool 16 when the rotating tool 16 that is rotating is first brought into contact with the workpiece 10 and pressed.

  The material of the rotary tool 16 and the dimensions of each part are mainly set according to the metal type of the metal member 11 pressed by the rotary tool 16. For example, when the metal member 11 is made of an aluminum alloy, the rotary tool 16 is made of tool steel (for example, SKD61), the diameter D1 of the shoulder surface 16b is 10 mm, the diameter D2 of the pin portion 16a is 2 mm, and the pin portion 16a protrudes. The length h is set to 0.5 mm. For example, when the metal member 11 is made of steel, the rotary tool 16 is made of silicon nitride, PCBN (cubic boron nitride sintered body), etc., the diameter D1 of the shoulder surface 16b is 10 mm, and the diameter D2 of the pin portion 16a. Is set to 3 mm, and the protruding length h of the pin portion 16a is set to 0.5 mm. Needless to say, these are merely examples, and the present invention is not limited thereto. For example, the diameter of the rotating tool 16 is usually the diameter D1 of the shoulder surface 16b, and is usually 5 to 100 mm, particularly 5 to 20 mm.

(4) Specific Example of Joining Method of Metal Member and Resin Member Based on Friction Stir Welding Method A joining method based on the friction stir welding method according to the present invention includes at least the following steps:
A first step in which the metal member 11 and the resin member 12 are overlapped with each other and the adhesive 3 is interposed therebetween; and the rotary tool 16 as the pressing member is rotated and pressed against the metal member 11 to generate frictional heat. A second step of joining the metal member 11 and the resin member 12 by softening and melting the resin member 12 with the frictional heat and then solidifying it.
The metal member 11 and the resin member 12 obtained in the first step are called “work” 10.

First step:
In the first step, the metal member 11 and the resin member 12 are overlapped so that their facing surfaces 110 and 120 face each other. Specifically, the metal member 11 and the resin member are arranged such that the convex portion of at least one of the metal member 11 or the resin member 12 is disposed between the main body portion 111 of the metal member 11 and the main body portion 121 of the resin member 12. 12 is superimposed. For example, when the resin member 12 has the convex portion 122, the metal member 11 and the resin member 12 are overlapped so that the convex portion 122 contacts the metal member 11 as shown in FIG. 2A. Further, for example, when the metal member 11 has the convex portion 112, the metal member 11 and the resin member 12 are overlapped so that the convex portion 112 contacts the resin member 12, as shown in FIG. 3A. . The contact between the convex portion and the metal member 11 or the resin member 12 may be indirect by the interposition of the adhesive 3.

  The adhesive 3 may be provided in any form as long as it is interposed between the metal member 11 and the resin member 12. As described above, for example, the adhesive 3 may be provided in the form of an adhesive layer on the facing surface of at least one of the metal member 11 and the resin member 12. Further, for example, the adhesive 3 is not provided on any of the opposing surfaces of the metal member 11 and the resin member 12, and independently of these opposing surfaces, the metal member 11 and the resin member 12 are in the form of an adhesive sheet. It may be provided in between. Further, for example, the adhesive 3 may be provided in a bead shape on the opposing surface of at least one of the metal member 11 or the resin member 12 and may have a layer form due to the proximity of both members in the second step. The adhesive 3 is provided in the form of an adhesive layer only on the surface 120 of the resin member 12 facing the metal member 11 from the viewpoint of further improving the bonding strength by increasing the flow rate of the molten resin, or the resin member 12. It is preferable that a bead shape is provided only on the opposite surface 120 of the first and second layers so as to have a layer form by their approach.

Second step:
In the second step, at least a push-in stirring step C <b> 2 is performed in which the rotary tool 16 is pushed into the metal member 11 to enter a depth that does not reach the joining boundary surface 130 between the metal member 11 and the resin member 12. At this time, the rotating tool 16 applies pressure and heat to the convex portion via the metal member 11.

  For example, when the resin member 12 has the convex portion 122, as shown in FIG. 2A and FIGS. 4A to 4D, it corresponds to a position immediately below the pressing region P (see FIG. 1) of the rotary tool 16 on the metal member 11. The rotary tool 16 is pushed into the metal member 11 so that the formation region of the convex portion 122 is disposed in the region P ′ on the surface of the resin member 12 to be performed. From the viewpoint of further improving the bonding strength and its reliability, preferably, as shown in FIGS. 2A and 4A to 4D, the region P ′ is positioned at the center of the formation region of the convex portion 122. The rotary tool 16 is pushed into the metal member 11.

  In addition, for example, when the metal member 11 has the convex portion 112, as shown in FIG. 3A, the convex portion 112 is formed immediately below the pressing region P (see FIG. 1) of the rotary tool 16 on the metal member 11. The rotary tool 16 is pushed into the metal member 11 so that the area is arranged. From the viewpoint of further improving the bonding strength and its reliability, the rotary tool 16 is preferably set so that the region immediately below the region P is located at the center of the region where the convex portion 112 is formed as shown in FIG. 3A. Push into the metal member 11.

In the present invention, in the second step, preheating is performed to rotate the rotary tool 16 in a state where the shoulder surface 16b (only the tip portion) of the rotary tool 16 is in contact with the surface portion of the metal member 11 before the pushing and stirring step. Although it is preferable to perform step C1, it does not necessarily have to be performed.
After the indentation stirring step, it is preferable to perform the stirring maintenance step C3 in which the rotation operation of the rotary tool 16 is continued at the position where the rotary tool 16 has entered to a depth that does not reach the joining boundary surface. It doesn't have to be.

  Hereinafter, each step will be described in detail.

(Preheating process C1)
In the preheating step C1, as shown in FIGS. 2A and 3A, the shoulder surface 16b (only the front end portion) of the rotary tool 16 is moved to the surface portion of the metal member 11 by bringing the rotary tool 16 and the receiving member 17 close to each other. This is a step of rotating the rotary tool 16 in a state of being in contact with the upper surface (in the example shown in the figure). In the preheating step C1, the rotary tool 16 is rotated at a predetermined rotation speed (for example, 3000 rpm) for a first pressurizing time (for example, 1.00 seconds) with a first pressure (for example, 900 N). 2A and 3A are schematic cross-sectional views when the ZZ cross section in FIG. 1 is viewed in the arrow direction, and are schematic cross-sectional views for explaining a preheating step in the joining method of the present invention.

  Specifically, in the preheating step C <b> 1, frictional heat is generated at the surface portion (upper surface portion in the illustrated example) of the metal member 11 by pressing of the rotary tool 16. The frictional heat is transmitted to the inside of the metal member 11, and the range of the pressing region P of the metal member 11 and the range in the vicinity of the pressing region P are preheated. Thereby, it becomes easy to push the rotary tool 16 into the metal member 11 in the next pushing and stirring step C2. In the next indentation stirring step C2, the molten resin flows together with the adhesive 3 in a radial direction from the convex portion toward the outer peripheral side, that is, from the center of the region 60 immediately below to the outer peripheral region 61 in plan view. And it becomes easy to move.

  In the preheating step C <b> 1, the frictional heat is conducted to the resin member 12 through the boundary surface between the metal member 11 and the resin member 12. For example, when the resin member 12 has the convex portion 122 (FIG. 2A), the frictional heat is first conducted to the top portion 1220 of the convex portion 122 in the resin member 12, so that the top portion 1220 is locally and first melted. It becomes easy. Further, for example, when the metal member 11 has the convex portion 112 (FIG. 3A), the frictional heat is first conducted to the portion 1250 where the top portion 1120 of the convex portion 112 approaches in the resin member 12, and thus the approaching portion 1250. Tends to melt locally and initially.

  The first pressurizing force and the first pressurizing time in the preheating step C1 are set from the viewpoint of ease of pushing in the rotary tool 16 and the ease of softening / melting of the resin member 12, and values thereof. Varies depending on, for example, the rotational speed of the rotary tool 16, the thickness of the metal member 11, the type of material, and the like. For example, when the aluminum alloy metal member 11 having a thickness of 1 mm or more and 2 mm or less is used, the first pressure in the preheating step C1 is 700 N or more and less than 1200 N, and the first pressurizing time is 0.5 seconds. A value of not less than 2.0 seconds and a rotation speed of the rotary tool is preferably not less than 500 rotations / minute and not more than 10,000 rotations / minute.

(Indentation stirring step C2)
The pushing and stirring step C2 is a step of pushing the rotating tool 16 into the metal member 11 as shown in FIGS. 2B to 2C and FIGS. 3B to 3C by bringing the rotating tool 16 and the receiving member 17 close to each other. . When the indentation stirring step C2 is performed after the preheating step C1, the rotary tool 16 and the receiving member 17 are further brought closer to each other, as shown in FIGS. 2B to 2C and FIGS. 3B to 3C. 16 is pushed into the metal member 11. That is, the rotary tool 16 is advanced to a depth that does not reach the boundary surface 130 between the metal member 11 and the resin member 12. Thereby, in a plan view, the molten resin is moved from the convex portion toward the outer peripheral side in the arrow direction (FIGS. 2B to 2C and FIGS. 3B to 3C), that is, from the center of the immediately lower region 60 to the outer peripheral region 61. And flow and move together with the adhesive 3 radially.

  Specifically, in the indentation stirring step C2, the rotary tool 16 is moved at a second pressurizing time (for example, 1500 N) that is larger than the first pressurizing time and shorter than the first pressurizing time (for example, Rotate at a predetermined rotation speed (for example, 3000 rpm) for 0.25 seconds.

  In the indentation stirring step C2, the rotating tool 16 is pushed into the metal member 11 when the applied pressure is larger than that in the preheating step C1. That is, the rotary tool 16 enters deep inside the metal member 11. 2C and 3C, the joint interface 130 between the metal member 11 and the resin member 12 is placed on the receiving side (in the illustrated example). The lower part 115 projects and deforms toward the resin member 12 side. Also in this manner, the molten resin in the region 60 directly below the rotary tool on the joint boundary surface 130 in the plan view from the convex portion toward the outer peripheral side in the arrow direction, that is, from the center of the region 60 directly below the outer peripheral region 61. Toward and toward the surface. Along with this, the adhesive 3 also moves. The molten resin spreads in a substantially circular shape centering on the region 60 directly below the rotary tool.

  If the rotary tool 16 is pushed further (that is, if the applied pressure is too high and / or the pressurizing time is too long), the shoulder surface 16b of the rotary tool 16 exceeds the joint boundary surface. That is, the rotary tool 16 penetrates the metal member 11 and contacts the resin member 12. Then, the metal member 11 is in a holed state in which the hole through which the rotary tool 16 has passed is opened, resulting in poor bonding.

  Therefore, in the present invention, in the indentation stirring step C2, the indentation of the rotation tool 16 is stopped when the shoulder surface 16b of the rotation tool 16 enters a depth that does not reach the joint boundary surface. In other words, the rotary tool 16 is advanced to a depth that does not reach the joint interface. As a result, in the next agitation maintaining step C3, frictional heat is generated at a reference position close to the resin member 12, a large amount of frictional heat is transmitted to the resin member 12, and the melting and flow (movement) of the resin member 12 is promoted. . Along with this, the movement of the adhesive 3 is also promoted.

  The second pressing force and the second pressurizing time in the indentation stirring step C2 are set from the viewpoint of avoiding the opening of the metal member 11 as described above and the rotating tool 16 as close to the resin member 12 as possible. The value varies depending on, for example, the number of rotations of the rotary tool 16, the thickness of the metal member 11, the type of material, and the like. For example, when the aluminum alloy metal member 11 having a thickness of 1 mm or more and 2 mm or less is used, the second pressing force in the indentation stirring step C2 is a value of 1200 N or more and less than 1800 N, and the second pressurizing time is 0.1. A value of at least 2 seconds and less than 0.5 seconds, and a rotation speed of the rotating tool is preferably at least 500 rotations / minute and not more than 10,000 rotations / minute.

(Stirring maintenance step C3)
The agitation maintaining step C3 stops the mutual proximity of the rotary tool 16 and the support 17 and, as shown in FIG. 2C and FIG. Is referred to as “reference position”), and the rotation operation of the rotary tool 16 is continued. In the stirring maintaining step C3, the rotary tool 16 is moved to a third pressurizing time (for example, 5.75) longer than the first pressurizing time with a third pressurizing force (for example, 500 N) smaller than the first pressurizing force. Seconds) at a predetermined rotation speed (for example, 3000 rpm).

  In the stirring maintaining step C3, the rotating tool 16 is maintained at the reference position by the applied pressure being smaller than that of the preheating step C1 (of course, being smaller than that of the pushing stirring step C2). Since the rotary tool 16 continues to rotate at the reference position close to the resin member 12, a large amount of frictional heat is generated, and most of the generated frictional heat moves to the resin member 12. Therefore, the resin member 12 is sufficiently softened and melted in a wide range beyond the range of the region 60 immediately below the pressing region P, and more effectively in the direction of the arrow in a plan view, from the convex portion to the outer periphery thereof. It flows and moves radially toward the side, that is, from the center of the region 60 directly below to the outer peripheral region 61. Along with this, the adhesive 3 also moves.

  The third pressurizing force and the third pressurizing time in the stirring maintaining step C3 are set from the viewpoint of sufficient softening and melting of the resin member 12 as described above, and the values thereof are, for example, the rotary tool 16. Depending on the number of rotations, the thickness of the metal member 11, the type of material, and the like. For example, when the aluminum alloy metal member 11 having a thickness of 1 mm or more and 2 mm or less is used, the third pressing force in the stirring maintaining step C3 is a value of 100 N or more and less than 700 N, and the third pressurizing time is 1.0. A value of not less than 10 seconds and less than 10 seconds, and the rotation speed of the rotary tool is preferably not less than 500 rotations / minute and not more than 10,000 rotations / minute.

(Holding process C4)
After the indentation stirring step C2 or the stirring maintaining step C3, a holding step C4 is performed in which the rotation of the rotary tool 16 is stopped and the rotary tool 16 is held at a predetermined pressure for a predetermined pressurizing time. Also good.
Similarly, as shown in FIGS. 2C and 3C, the holding step C4 is a step in which the rotation of the rotary tool 16 is stopped and the rotary tool 16 is held for a predetermined time with a predetermined pressure in that state. In the holding step C4, the rotary tool 16 is moved at a fourth pressure force (for example, 1000 N) that is larger than the third pressure force but smaller than the second pressure force and shorter than the third pressurization time but the second pressure force. Hold for a fourth pressurization time (for example, 5.00 seconds) longer than the pressure time.

  In the holding step C4, the rotation of the rotary tool 16 is stopped, whereby the generation of frictional heat is completed. That is, the substantial operation as the friction stir welding is finished, and cooling of the workpiece 10 is started. During the cooling period of the workpiece 10, the rotating tool 16 whose rotation is stopped due to the pressure force being smaller than the indentation stirring step C 2 but larger than the stirring maintaining step C 3 is the metal member 11, the resin member 12, and the receiving member 17. And clamp between. Thereby, the adhesive force during cooling between the metal member 11 and the resin member 12 is increased, and the bonding strength after the completion of cooling and solidification is increased.

  The fourth pressurizing force and the fourth pressurizing time in the holding step C4 are set from the viewpoint of improving the adhesion strength of the pressing region P during the cooling period as described above, and the values thereof are, for example, those of the material of the metal member 11 It varies depending on the type. For example, when the aluminum alloy metal member 11 is used, the fourth pressing force in the holding step C4 is preferably a value of 700 N or more and less than 1200 N, for example. The fourth pressurization time is preferably, for example, a value of 1 second or longer.

  In the present invention, at least through the above-described steps C2, preferably through the above-described steps C1 and C2, more preferably through the above-described steps C1 to C3, and most preferably through the above-described steps C1 to C4, finally. As shown in FIG. 6, a joined body 20 of the metal member 11 and the resin member 12 in which the metal member 11 and the resin member 12 are joined with high strength in a wide range is obtained. FIG. 6 is a schematic plan view showing the surface state of the resin member obtained by forcibly peeling the metal member from the joined body obtained by the joining method of the present invention.

  After performing a predetermined process in the second step, cooling is usually performed to solidify the molten resin. The cooling method is not particularly limited, and examples thereof include a standing cooling method.

(5) Bonded Body The bonded body 20 of the metal member 11 and the resin member 12 bonded by the bonding method of the present invention is a metal in the region 60 directly below the rotating tool of the resin member 12 and the outer peripheral region 61 on the bonding boundary surface 130. Joining of the member 11 and the resin member 12 is achieved. This can be detected by confirming that the melted and solidified region obtained by solidifying the molten resin spreads in a substantially circular shape centering on the region 60 directly below the rotary tool at the joining interface 130 of the joined body 20. .

Hereinafter, unless otherwise specified, the joined body joined by the joining method according to one embodiment of the present invention will be described.
Specifically, when the metal member 11 is forcibly separated from the joined body 20, for example, a contact surface 122a of the resin member 12 with the metal member 11 as shown in FIG. 6 can be observed. In such a contact surface 122a of the resin member 12, the melting and solidifying region is composed of a resin melting region 131A (shaded region) in the region 60 immediately below the rotary tool and a molten resin flow region 132A (lattice region) in the outer peripheral region. ing.

  The resin melting region 131 </ b> A has a concave shape with a diameter substantially equal to the diameter of the rotating tool due to the protruding deformation of the metal member 11 on the surface thereof. Further, since the minute shape on the surface of the metal member 11 is transferred and may be discolored depending on the bonding strength, it is visually confirmed by comparison with the surface properties (surface roughness, color, etc.) of the original resin member 12. Recognition is easily possible.

  Since the minute shape of the surface of the metal member 11 is transferred to the surface of the molten resin flow region 132A and the color may be changed depending on the bonding strength, the surface properties (surface roughness, color, etc.) of the original resin member 12 may be changed. By comparison with others, visual recognition is easily possible.

  In the present invention, since the adhesive 3 flows and moves by the molten resin, the content ratio of the component derived from the adhesive 3 in the molten resin flow region 132A (particularly the outer peripheral portion) is higher than the content ratio in the resin melt region 131A. It has become.

  In the joined body of the metal member 11 and the resin member 12 joined by the joining method of the present invention, the gap distance between the metal member 11 and the resin member 12 is usually 2 mm or less, which contributes to the adhesive strength by the adhesive. From the viewpoint, it is preferably 1 mm or less, more preferably 0.8 mm or less, and still more preferably 0.5 mm or less. The gap distance is preferably as short as possible, and the lower limit is usually 0.1 mm or 0.2 mm. This gap distance is the “uncrushed height” when the resin member 12 has the convex portion 122 and the metal member 11 does not have the convex portion 112.

[Example 1]
(Resin member)
Resin member provided with a convex portion 122 having a corrugated raised shape as shown in FIG. 4A by injection molding using polypropylene pellets (PP-CF40-11; manufactured by Daicel Polymer Co., Ltd.) containing 40% by weight of carbon fiber. 12 was produced. The convex portion 122 was formed by transferring a molding surface of a mold used in the injection molding method. An adhesive (epoxy resin; BF9050L; manufactured by Dow Chemical Co.) is applied to the entire surface 120 of the convex portion 122 of the resin member 12 so that the thickness of the adhesive layer 3 after bonding is 0.2 mm. Application was performed at an amount of 100 mg / m ² .
The dimensions of the resin member 12 were as follows (see FIG. 4A):
Overall dimensions: 100mm length x 60mm width
Convex portion maximum width W1 = 10 mm;
Convex part height H = 2 mm;
t = 3 mm.

(Metal member)
As the metal member 11, a flat plate member made of 6000 series aluminum alloy was used.
The dimensions of the metal member 11 were as follows:
Overall dimensions: length 100mm x width 60mm x thickness (T) 1.2mm

(Rotation tool)
As the rotating tool, a tool made of tool steel having dimensions of each part in FIG. 5 of D1 = 10 mm, D2 = 2 mm, and h = 0.25 mm was used.

(Joining method)
The joined body of the metal member 11 and the resin member 12 was manufactured by the following method.
First step:
The metal member 11 and the resin member 12 were overlaid as shown in FIGS. 1 and 2A.

Second step:
The center of the region P ′ (see FIG. 4A) on the surface of the resin member 12 corresponding to the position immediately below the pressing region P (see FIG. 1) of the rotary tool 16 on the metal member 11 is positioned at the center of the convex portion 122. The rotary tool 16 was pushed into the metal member 11.
Specifically, as shown in FIG. 2A, the rotary tool 16 is moved in a state where only the pin portion 16 a of the rotary tool 16 is pushed into the metal member 11 and the shoulder surface 16 b of the rotary tool 16 is in contact with the surface portion of the metal member 11. It was rotated (preheating step C1: pressing force 900 N, pressurizing time 1.00 seconds, tool rotation speed 3000 r).
Next, as shown in FIGS. 2B and 2C, the rotary tool 16 is further pushed into the metal member 11 to a depth not reaching the joining interface between the metal member 11 and the resin member 12 (pushing stirring step C2: addition Pressure 1500N, pressurization time 0.25 seconds, tool rotation speed 3000 rpm).
Next, as shown in FIG. 2C, the rotating operation of the rotating tool 16 was continued at the position where the rotating tool 16 was advanced to a depth that did not reach the joining boundary surface (stirring maintaining step C3: pressurizing pressure 500N, pressurizing time) 5.75 seconds, tool rotation speed 3000 rpm).
Next, the rotary tool 16 was extracted from the metal member 11 and left to cool.

(Joint strength)
The joined body in which the metal member and the resin member were joined by a method defined in JIS Z 3136 was pulled in the directions indicated by arrows Y and Y in FIG. Evaluation was based on the shear strength S.
A: 5.0 kN ≦ S (excellent);
O; 2.0 kN ≦ S <5.0 kN (good);
Δ: 1.0 kN ≦ S <2.0 kN (no problem in practical use);
X: S <1.0 kN (problem in practical use).

[Examples 2 to 11 and Comparative Example 1]
In the resin member, the metal member and the resin member were joined and evaluated by the same method as in Example 1 except that the shape and dimensions of the convex portions were changed as shown in the table.
The resin member used in Comparative Example 1 does not have a convex portion.

  The joining method according to the present invention is useful for joining a metal member and a resin member in the fields of automobiles, railway vehicles, aircraft, home appliances, and the like.

1: Friction stir welding device 3: Adhesive (adhesive layer)
DESCRIPTION OF SYMBOLS 10: Work | work 11: Metal member 12: Resin member 111: Metal member main-body part 112: Metal member convex-shaped part 121: Resin member main-body part 122: Resin member convex-shaped part 16: Rotating tool 17: Receiver 20: Joined body 120 : Surface of the resin member on the side to be joined with the metal member P: Pressing area (scheduled pressing area) by the rotating tool on the metal member surface
P ′: a region on the surface of the resin member corresponding to directly below the pressing region P

Claims (18)

The metal member and the resin member are overlapped, and with the adhesive interposed therebetween, the resin member is melted by applying pressure and heat from the metal member side to join the metal member and the resin member. It is a joining method of a metal member and a resin member by a hot-pressure joining method,
At least one member of the metal member or the resin member has a convex portion on the surface facing the other member, and by melting the resin member between the convex portion and the other member, The molten resin is flowed together with the adhesive from the convex portion toward the outer periphery in a plan view ,
The convex portion has a corrugated ridge shape, a corrugated ridge trapezoid shape, a cone shape, or a frustum shape in a cross-sectional view, and is a method for joining a metal member and a resin member. The pressure is applied by a pressing member;
The joining method of the metal member and resin member of Claim 1 with which the area S1 of the top part of the said convex-shaped part and the pressing area S2 by the said pressing member satisfy | fill the following relational expressions.
S1 / S2 ≦ 0.8 The pressure is applied by a pressing member;
The joining method of the metal member and resin member of Claim 1 or 2 with which the maximum width W1 of the said convex-shaped part and the maximum width (diameter) D1 of the said press member satisfy | fill the following relational expressions.
1.0 ≦ W1 / D1 ≦ 10.0 The metal member and the resin member are overlapped, and with the adhesive interposed therebetween, the resin member is melted by applying pressure and heat from the metal member side to join the metal member and the resin member. It is a joining method of a metal member and a resin member by a hot-pressure joining method,
At least one member of the metal member or the resin member has a convex portion on the surface facing the other member, and by melting the resin member between the convex portion and the other member, The molten resin is flowed together with the adhesive from the convex portion toward the outer periphery in a plan view ,
The pressure is applied by a pressing member;
A joining method of a metal member and a resin member, wherein an area S1 of the top of the convex portion and a pressing area S2 by the pressing member satisfy the following relational expression .
S1 / S2 ≦ 0.8 The pressure is applied by a pressing member;
The joining method of the metal member and resin member of Claim 4 with which the maximum width W1 of the said convex-shaped part and the maximum width (diameter) D1 of the said press member satisfy | fill the following relational expressions.
1.0 ≦ W1 / D1 ≦ 10.0 The metal member and the resin member are overlapped, and with the adhesive interposed therebetween, the resin member is melted by applying pressure and heat from the metal member side to join the metal member and the resin member. It is a joining method of a metal member and a resin member by a hot-pressure joining method,
At least one member of the metal member or the resin member has a convex portion on the surface facing the other member, and by melting the resin member between the convex portion and the other member, The molten resin is flowed together with the adhesive from the convex portion toward the outer periphery in a plan view ,
The pressure is applied by a pressing member;
A joining method of a metal member and a resin member, wherein the maximum width W1 of the convex portion and the maximum width (diameter) D1 of the pressing member satisfy the following relational expression .
1.0 ≦ W1 / D1 ≦ 10.0 The resin member has a convex portion on a surface facing the metal member, and the molten resin is melted between the convex portion and the metal member by melting the convex portion from the top. The joining method of the metal member and resin member in any one of Claims 1-6 made to flow with the said adhesive agent. The metal member has a convex portion on the surface facing the resin member, and is melted from an approaching portion of the top of the convex portion in the resin member between the convex portion and the resin member. The method for joining a metal member and a resin member according to any one of claims 1 to 7 , wherein the molten resin is caused to flow together with the adhesive. The adhesive, the is provided with a layer form the facing surface of at least one of the metal member or the resin member, method of joining the metal member and the resin member according to any one of claims 1-8. The adhesive, the is provided with a layer form on the opposing surfaces of the metal member in the resin member, method of joining the metal member and the resin member according to any one of claims 1-9. The said adhesive agent is a joining method of the metal member and resin member in any one of Claims 1-8 provided in the bead shape at the opposing surface in at least one of the said metal member or the said resin member. The method for joining a metal member and a resin member according to any one of claims 1 to 11 , wherein the convex portion is a locally raised portion. The hot-pressure bonding method is a friction stir welding method,
The joining method according to any one of claims 1 to 12 , wherein the friction stir welding method includes the following steps:
A first step of superimposing the metal member and the resin member; and while rotating a rotary tool as a pressing member, the metal member is pressed to generate frictional heat, and the resin member is melted by the frictional heat. And then solidifying and joining the metal member and the resin member. The joining method according to claim 13 , wherein the second step includes a pushing and stirring step of pushing the rotating tool into the metal member to enter a depth that does not reach a boundary surface between the metal member and the resin member. The second step is, before the pushing stirring step, wherein the shoulder surface of the rotary tool to claim 14, further comprising a preheating step of rotating the rotary tool in a state in contact with the surface portion of the metal member Joining method. In the preheating step, the rotary tool is rotated by a first pressurizing time while being pressed with a first pressing force,
Wherein the pushing stirring step of claim 15 is rotated only between the rotary tool is shorter than between the pressed while the first pressurization in the first pressure is greater than the second pressure second pressurization Joining method. The second step further comprises an agitation maintaining step of continuing the rotation operation of the rotary tool at a position where the rotary tool has entered to a depth that does not reach the boundary surface,
Wherein the agitation maintains process of claim 16 which rotates only between the rotating the tool first longer than between the first pressurization while pressing under a pressure less than the third pressure third pressurization Joining method. The said 2nd step is further equipped with the holding process which stops rotation of the said rotation tool after a stirring maintenance process, and hold | maintains the said rotation tool with a predetermined pressurizing force for a predetermined pressurization time in the state. 18. The joining method according to item 17 .

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