CN112105480A - Joining method and method for manufacturing composite rolled material - Google Patents
Joining method and method for manufacturing composite rolled material Download PDFInfo
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- CN112105480A CN112105480A CN201980031333.1A CN201980031333A CN112105480A CN 112105480 A CN112105480 A CN 112105480A CN 201980031333 A CN201980031333 A CN 201980031333A CN 112105480 A CN112105480 A CN 112105480A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
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Abstract
The method comprises a joining step of inserting a rotating tool (F) into only the front surface (1b) of a first metal member (1) and joining the first metal member (1) and a second metal member (2) by relatively moving the rotating tool (F) along a butt joint section (J) in a state where only a stirring pin (F2) is in contact with at least the first metal member (1), wherein the joining step is performed in a state where γ ═ α - β when an inclination angle of a rotation central axis (C) of the rotating tool (F) with respect to a plumbum surface is (γ), an inclination angle of an inclined surface with respect to the plumbum surface is (β), and an inclination angle of an outer peripheral surface of the stirring pin (F2) with respect to the rotation central axis (C) is (α).
Description
Technical Field
The present invention relates to a joining method and a method for manufacturing a composite rolled material.
Background
For example, patent document 1 discloses a technique of friction stir welding metal members of different materials to each other by a rotary tool.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2016-150380
Disclosure of Invention
Technical problem to be solved by the invention
In a conventional joining method, inclined surfaces are provided at both end portions of a first metal member and a second metal member, and the inclined surfaces are brought into surface contact with each other and butted against each other. Therefore, the formation of the inclined surface is complicated, and if the inclination angles of the two metal members are not matched, the two metal members are not in surface contact, which causes a problem that the preparation process and the butt joint process are complicated.
From such a viewpoint, an object of the present invention is to provide a joining method and a method for manufacturing a clad rolled material, by which different kinds of metal members can be easily joined.
Technical scheme for solving technical problem
In order to solve the above-described problems, the present invention is a joining method for joining a pair of metal members different in material by using a rotary tool including a stirring pin tapered at a tip end, the joining method including: a preparation step of preparing a first metal member having a vertical surface at an end portion and a second metal member having an inclined surface at an end portion, the second metal member having a melting point higher than that of the first metal member and a plate thickness smaller than that of the first metal member; a butting step of butting end portions of the first metal member and the second metal member against each other to form a butting portion having a V-shaped gap; and a joining step of joining the first metal member and the second metal member by relatively moving the rotary tool along the abutting portion while inserting the rotary tool from only the front surface of the first metal member and bringing only the stirring pin into contact with at least the first metal member, wherein the joining step is performed in a state where γ is an inclination angle of a rotation center axis of the rotary tool with respect to a plumb surface, β is an inclination angle of the inclined surface with respect to the plumb surface, and α is an inclination angle of an outer peripheral surface of the stirring pin with respect to the rotation center axis.
Further, the present invention is a method for manufacturing a clad rolled material formed of a pair of metal members made of different materials, comprising: a preparation step of preparing a first metal member having a vertical surface at an end portion, a second metal member having an inclined surface at an end portion, the second metal member having a higher melting point than the first metal member, the second metal member having a smaller plate thickness than the first metal member, and a rotary tool including a stirring pin having a tapered tip; a butting step of butting end portions of the first metal member and the second metal member against each other to form a butting portion having a V-shaped gap; a joining step of inserting the rotating tool that rotates from only the front surface of the first metal member and joining the first metal member and the second metal member by relatively moving the rotating tool along the butting portion while only the stirring pin is in contact with at least the first metal member; and a rolling step of rolling the metal members joined in the joining step in a rolling direction of the joined wire, wherein the joining step is performed in a state where γ is an angle of inclination of a rotation central axis of the rotary tool with respect to a plumb bob plane, β is an angle of inclination of the inclined plane with respect to the plumb bob plane, and α is an angle of inclination of an outer peripheral surface of the stirring pin with respect to the rotation central axis.
According to the joining method or the manufacturing method, the inclined surface may be formed as long as the second metal member is formed. Further, since the two metal members are butted with each other with the V-shaped gap therebetween, the butting work can be easily performed without high accuracy. Further, for example, when the rotary tool is inserted so as to contact only the first metal member, the joining condition can be adjusted according to the first metal member having a low softening temperature, and the amount of heat generated can be suppressed. Therefore, the first metal member can be prevented from being softened significantly to generate excessive burrs, and poor bonding due to insufficient metal can be prevented. Further, by matching the inclination angle γ of the rotation center axis of the rotary tool with respect to the plumb face with the value obtained by subtracting the inclination angle β of the inclined face from the inclination angle α of the outer peripheral face of the stirring pin with respect to the rotation center axis, it is possible to select optimum values as the inclination angles α, β and to make the outer peripheral face of the stirring pin parallel to the inclined face, and it is possible to make the outer peripheral face of the stirring pin and the inclined face as close as possible in the entire height direction while avoiding contact between the outer peripheral face of the stirring pin and the inclined face. Further, the metal deficiency at the joint portion can be prevented by making the plate thickness of the first metal member larger than the plate thickness of the second metal member.
In the butt joint step, it is preferable that the first metal member and the second metal member are butted to each other in a state where a back surface of the first metal member and a back surface of the second metal member are flush with each other.
According to the joining method, the back surfaces of the metal members can be made coplanar with each other.
In the joining step, it is preferable that the first metal member and the second metal member are butted so that the back surface of the first metal member is located at a position lower than the back surface of the second metal member and the front surface of the first metal member is located at a position higher than the front surface of the second metal member, and the insertion depth of the stirring pin is set so that the tip of the stirring pin is located at a position lower than the height of the back surface of the second metal member.
According to the joining method, friction stirring can be performed over the entire depth direction of the second metal member.
In the joining step, it is preferable that the rotation direction and the advancing method of the rotary tool are set so that the second metal member side is a shear side and the first metal member side is a flow side in a plasticized region formed in a movement locus of the rotary tool.
If the second metal member having a high melting point is on the flow side in the plasticized region, the temperature of the first metal member at the butting portion is lowered, so that interdiffusion at the interface between different metals cannot be promoted, and a bonding failure may occur. However, according to the joining method, by setting the side of the second metal member having a high melting point as the shear side, the temperature of the first metal member at the butted portion can be maintained at a relatively high temperature, interdiffusion at the interface between different metals can be promoted, and a poor joint can be prevented.
The shear side is a side where the relative speed of the outer periphery of the rotary tool with respect to the joint is a value obtained by adding the magnitude of the tangential speed at the outer periphery of the rotary tool to the magnitude of the moving speed. The flow side is a side where the relative speed of the outer periphery of the rotary tool with respect to the joint is a value obtained by subtracting the magnitude of the moving speed from the magnitude of the tangential speed at the outer periphery of the rotary tool.
In the preparation step, it is preferable that the first metal member is formed of aluminum or an aluminum alloy, and the second metal member is formed of copper or a copper alloy, and in the joining step, the rotary tool is relatively moved along the butting portion so as to butt the first metal member and the second metal member while only the stirring pin is in contact with only the first metal member.
According to the joining method, a metal member made of copper or a copper alloy can be preferably joined to a metal member made of aluminum or an aluminum alloy.
In the joining step, it is preferable that the rotary tool is rotated to the right when a spiral groove that spirals to the left from the base end toward the tip end is formed in the outer peripheral surface of the rotary tool, and the rotary tool is rotated to the left when a spiral groove that spirals to the right from the base end toward the tip end is formed in the outer peripheral surface of the rotary tool.
According to the joining method, since the plastically fluidized metal is guided by the spiral groove and flows toward the tip side of the rotary tool, the generation of burrs can be suppressed.
Effects of the invention
According to the joining method and the method for manufacturing a composite rolled material of the present invention, it is possible to desirably join different kinds of metal members.
Drawings
Fig. 1 is a side view showing a rotary tool of an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view showing a joining mode of the rotary tool according to the present embodiment.
Fig. 3 is a cross-sectional view showing a preparation process and a docking process of the first embodiment of the present invention.
Fig. 4 is a perspective view illustrating a bonding process of the first embodiment.
Fig. 5 is a sectional view showing the bonding process of the first embodiment.
Fig. 6 is a cross-sectional view showing the first embodiment after the bonding step.
Fig. 7 is a perspective view showing a rolling process of the first embodiment.
Fig. 8 is a cross-sectional view showing the rolling process of the first embodiment.
Fig. 9 is a cross-sectional view showing a preparation process and a docking process of the second embodiment of the present invention.
Fig. 10 is a sectional view showing a bonding process of the second embodiment.
Fig. 11 is a cross-sectional view showing the second embodiment after the bonding step.
Detailed Description
[ first embodiment ]
A method for manufacturing a composite rolled material according to an embodiment of the present invention will be described in detail with reference to the drawings. First, a rotary tool used in the present embodiment will be described.
As shown in fig. 1, the rotary tool F includes a coupling portion F1 and a stirring pin F2. The rotary tool F is formed of, for example, tool steel. The connection portion F1 is a portion connected to a rotating shaft (not shown) of the friction stir apparatus. The coupling portion F1 has a cylindrical shape and is formed with a screw hole (not shown) to which a bolt is fastened.
The stirring pin F2 is suspended from the coupling portion F1 and is coaxial with the coupling portion F1. The stirring pin F2 has a tip tapered as it goes away from the coupling portion F1. In the side view, the inclination angle α of the rotation center axis C to the outer peripheral surface of the stirring pin F2 is set to 15 ° in the present embodiment. The inclination angle alpha is properly set within the range of 10-60 deg. If the inclination angle α is smaller than 10 °, burrs are discharged from the outer peripheral surface of the stirring pin F2 at the time of joining, and a joining defect may occur, which is not preferable. If the inclination angle α exceeds 60 °, the diameter of the rotary tool F becomes too large, and the load on the rotary tool F and the friction stir device becomes large, which is not preferable.
A spiral groove is engraved on the outer peripheral surface of the stirring pin F2. In the present embodiment, since the rotary tool F is rotated rightward, the spiral groove is formed to be twisted leftward from the base end toward the tip end. In other words, the spiral groove is formed to be wound leftward as viewed from above when the spiral groove is drawn from the base end toward the tip end. A flat surface F3 horizontal to the rotation center axis C is formed at the tip of the stirring pin F2.
Further, when the rotary tool F is rotated to the left, the spiral groove is preferably formed to be wound to the right from the base end toward the tip end. In other words, the spiral groove at this time is formed to be wound rightward when viewed from above when the spiral groove is drawn from the base end toward the tip end. By setting the spiral groove in this manner, the plastically fluidized metal is guided by the spiral groove toward the leading end side of the stirring pin F2 when friction stirring is performed. This can reduce the amount of metal that overflows to the outside of the joined metal members (first metal member 1 and second metal member 2 described later).
As shown in fig. 2, when friction stirring is performed using the rotary tool F, only the stirring pin F2 that rotates is inserted into the joined metal members, and the rotary tool F is moved while separating the joined metal members from the coupling portion F1. In other words, the friction stirring is performed with the base end portion of the stirring pin F2 exposed. On the moving track of the rotary tool F, a plasticized region W is formed by hardening of the metal after the friction stir.
Next, a method for manufacturing a clad rolled material according to the present embodiment will be described. The method for manufacturing a composite rolled material according to the present embodiment is a method for obtaining a composite rolled material by joining a pair of metal members to each other by a rotary tool F and then rolling the joined metal members. In the following, the surface opposite to the "back surface" is referred to as the "front surface".
As shown in fig. 3, the first metal member 1 has a plate shape. The end surface 1a of the first metal member 1 is a vertical surface perpendicular to the front surface 1b and the back surface 1 c. The first metal member 1 is formed of an aluminum alloy in the present embodiment, but may be formed of a friction stir-able metal material such as aluminum, copper, a copper alloy, titanium, a titanium alloy, magnesium, or a magnesium alloy.
The second metal member 2 has a plate shape. The plate thickness of the second metal member 2 is smaller than that of the first metal member 1. The end surface 2a of the second metal member 2 is an inclined surface inclined with respect to the plumb surface. The inclination angle β of the end surface 2a may be set as appropriate, but in the present embodiment, it is formed to be smaller than the inclination angle α of the stirring pin F2. The second metal member 2 is formed of a material having a melting point higher than that of the first metal member 1 and capable of friction stirring. The second metal member 2 may also be formed of copper or a copper alloy, for example.
In the method for manufacturing a composite rolled material according to the present embodiment, a preparation step, a butt joint step, a joining step, and a rolling step are performed. The joining method in the scope of claims is a step of performing a preparation step, a butt joint step, and a joining step.
The preparation step is a step of preparing the first metal member 1, the second metal member 2, and the rotary tool F.
As shown in fig. 3, the butt joint step is a step of butt-jointing the end portions of the first metal member 1 and the second metal member 2 to each other. In the butting step, the end face 1a of the first metal member 1 and the end face 2a of the second metal member 2 are butted to form a butted portion J. The butt portion J forms a gap having a V-shaped cross section so as to expand toward the front surfaces 1b and 2 b. The back surface 1c of the first metal member 1 and the back surface 2c of the second metal member 2 are coplanar. The first metal member 1 and the second metal member 2 are immovably fixed to the mount K.
The joining step is a step of joining the first metal member 1 and the second metal member 2 using the rotary tool F. As shown in fig. 4, in the joining step, the rotary tool F is inserted into the front surface 1b of the first metal member 1 and set at the start position Sp near the butt portion J1 while rotating the stirring pin F2 of the rotary tool F to the right. Next, the rotary tool F is relatively moved in parallel with the extending direction of the butting portion J. The plasticized region W is formed on the moving trajectory of the rotary tool F. In the joining step, friction stir joining is mainly performed so that the plastic fluidizing material on the first metal member 1 side flows into the gap of the butting portion J.
As shown in fig. 5, in the primary joining step, the rotation center axis C of the rotary tool F is inclined by the inclination angle γ with respect to the plumb surface toward the first metal member, so that friction stirring is performed with only the stirring pin F2 in contact with only the first metal member 1. Here, the inclination angle γ of the rotation central axis C of the rotary tool F with respect to the plumb face is equal to a value obtained by subtracting the inclination angle β of the end face 2a of the second metal member 2 from the inclination angle α of the rotation central axis C and the outer peripheral surface of the stirring pin F2 (γ ═ α - β), and the end face 2a is made parallel to the outer peripheral surface of the stirring pin F2 facing the end face 2 a.
That is, the direction in which the rotation central axis C of the rotary tool F is inclined is determined by the relationship between the inclination angles α, β. For example, as in the present embodiment, when "α > β", the inclination angle γ is a positive value, and the rotation center axis C of the rotary tool F is inclined toward the first metal member side. In the case of "α < β", the inclination angle γ is a negative value, and the rotation center axis C of the rotary tool F is inclined toward the second metal member 2. In the case where "α ═ β", the inclination angle γ is "0 (zero)", so that the rotation center axis C of the rotary tool F is parallel to the plumb surface without being inclined.
In the joining step, in the plasticized region W, the second metal member 2 side (the side closer to the butt portion J) is set to be the shear side, and the first metal member 1 side (the side farther from the butt portion J) is set to be the flow side. That is, in the joining step of the present embodiment, the first metal member 1 is positioned on the right side in the traveling direction, and the rotary tool F is rotated to the right. In addition, when the second metal member 2 is disposed so as to be positioned on the right side in the traveling direction, the rotating tool F is rotated to the left, whereby the second metal member 2 side (the side close to the butting portion J) in the plasticized region W is set to the shearing side.
As shown in fig. 5, the insertion depth of the stirring pin F2 may be appropriately set, but in the present embodiment, the insertion depth is set to a depth of about 90% of the plate thickness of the first metal member 1. In the joining step of the present embodiment, the position of the start position Sp and the movement path are set so that the rotary tool F does not contact the second metal member 2, and the first metal member 1 and the second metal member 2 are diffusion-joined by friction stirring.
Here, if the outer peripheral surface of the rotary tool F is largely separated from the second metal member 2, the first metal and the second metal do not diffuse into each other at the butting portion J, and the first metal member 1 and the second metal member 2 cannot be firmly joined. On the other hand, if friction stirring is performed in a state where the rotary tool F is brought into contact with the second metal member 2 and the amount of overlap between the two is increased, the joining condition needs to be adjusted to increase the amount of heat input in order to soften the second metal member 2, which may cause a joining failure. Therefore, it is preferable that the first metal and the second metal are mutually diffused in the butting portion J by bonding in a state where the outer peripheral surface of the rotary tool F is slightly in contact with the second metal member 2 or in a state where the outer peripheral surface of the rotary tool F is not in contact with the second metal member 2 but is as close as possible.
In addition, as in the present embodiment, when the first metal member 1 is an aluminum or aluminum alloy member and the second metal member 2 is a copper or copper alloy member, it is preferable that the joining step be performed in a state in which the outer peripheral surface of the rotary tool F and the second metal member 2 are as close as possible without being in contact with each other. Incidentally, under the bonding condition where the amount of heat input becomes large, if the outer peripheral surface of the rotary tool F is brought into contact with the second metal member 2 (copper member), a small amount of the copper member is stirred and mixed into the aluminum alloy member, so that the interdiffusion of Al and Cu is promoted, and Al — Cu dispersed in the aluminum alloy member is transformed into a liquid phase, and a large amount of burrs are generated from the aluminum alloy member side, resulting in a bonding failure.
As shown in fig. 6, a burr V is formed on the front surface of the plastic region W. The plasticized region W is adjacent to the second metal member 2. That is, the plasticized region W is formed on the second metal member 2 side without passing over the butt portion J. Since the first metal member 1 is formed thicker than the second metal member 2, the plastic fluidizing material of the first metal member 1 flows into the gap of the butting portion J, and no groove or the like is generated on the front face of the plasticized region W. That is, insufficient metal of the joint portion can be prevented. Preferably, after the joining step is completed, a burr removal step of removing the burr V is performed.
The rolling step is a step of rolling the first metal member 1 and the second metal member 2 after joining. As shown in fig. 7, in the rolling step, cold rolling is performed using a rolling device including a roller R, R. In the rolling step, the joining line (plasticized region W) in the joining step is rolled while being set in the rolling direction. As described above, the composite rolled material 10 shown in fig. 8 is formed. The reduction ratio in the rolling step may be appropriately set depending on the material of the first metal member 1 and the second metal member 2 and the use of the composite rolled material 10. As shown in fig. 6, after the joining step, a difference in plate thickness occurs between the first metal member 1 and the second metal member 2, but after the rolling step shown in fig. 8, the metal members are rolled to such an extent that the difference can be ignored.
According to the method for manufacturing a clad rolled material and the joining method described above, in the joining step, the end surface 1a on the first metal member 1 side is perpendicular to the front surface 1b and the back surface 1c, and therefore, the first metal member 1 can be easily prepared. Further, although the second metal member 2 is provided with the inclined surface, the butting work can be easily performed because the butting work is performed with a gap having a V-shaped cross section in the butting process. In addition, the plate thickness of the first metal member 1 is made larger than the plate thickness of the second metal member 2, and the joining is performed so that the plastic fluidizing material flows into the gap of the butting portion J in the joining step, and therefore, insufficient metal at the joining portion can be prevented.
Further, since the shaft shoulder portion of the rotary tool is not brought into contact with the first metal member 1 and the second metal member 2, the amount of heat intake can be reduced, and the frictional resistance can be reduced, whereby the load on the rotary tool F and the friction stir device can be reduced. In addition, as in the present embodiment, when the first metal member 1 is an aluminum or aluminum alloy member and the second metal member 2 is a copper or copper alloy member, it is preferable that the joining step be performed in a state in which the outer peripheral surface of the rotary tool F is brought into close proximity to the second metal member 2 (copper member) as possible without contact. In this way, excessive burrs V are not generated from the aluminum alloy member side, and interdiffusion between the first metal member 1 and the second metal member 2 is promoted at the butting portion J, thereby firmly joining them. Therefore, compared to the conventional art, the amount of heat generated by the first metal member 1 and the second metal member 2 can be suppressed, the load on the rotary tool F and the friction stir apparatus can be reduced, and the generation of the excessive burr V from the first metal member 1 side can be suppressed. In addition, since the shaft shoulder portion is not brought into contact with the first metal member 1 and the second metal member 2, the rotary tool F can be prevented from becoming high temperature. This facilitates material selection of the rotary tool F and prolongs the life of the rotary tool F.
If the second metal member 2 having a high melting point is on the flow side in the plasticized region W, the temperature of the first metal member 1 at the butting portion J decreases, so that interdiffusion at the interface between different metals cannot be promoted, and a bonding failure may occur. If the joining condition is adjusted to increase the amount of heat input, excessive burrs are generated from the first metal member 1 side that becomes the shearing side, and this causes a joining defect. However, as in the present embodiment, by setting the joining conditions (the rotation direction, the traveling direction, and the like of the rotary tool F) such that the side of the second metal member 2 having a high melting point is the shearing side in the plasticized region W, the temperature of the first metal member 1 at the butting portion J1 can be kept at a relatively high temperature, interdiffusion at the interface between different metals can be promoted, and a poor joining can be prevented.
Although the outer peripheral surface of the rotary tool F may be slightly in contact with the second metal member 2, in the present embodiment, the rotary tool F is set so as not to be in contact with the second metal member 2, so that the first metal member 1 and the second metal member 2 can be prevented from being mixed and stirred, and the occurrence of excessive burrs V and the occurrence of poor joining can be more reliably prevented.
Further, since the rotation center axis C of the rotary tool F is inclined toward the first metal member 1 side with respect to the plumb face by only the inclination angle γ, the contact of the stirring pin F2 with the second metal member 2 can be easily avoided at the first butting portion J. In the present embodiment, the inclination angle γ of the rotation central axis C of the rotary tool F with respect to the plumb face is made to match the value obtained by subtracting the inclination angle β of the end face 2a of the second metal member 2 with respect to the plumb face from the inclination angle α of the outer peripheral face of the stirring pin F2 with respect to the rotation central axis C, so that the optimum values can be selected as the inclination angles α and β, and the outer peripheral face of the stirring pin F2 is made parallel to the end face 2a, whereby the outer peripheral face of the stirring pin F2 and the end face 2a can be made as close as possible in the entire height direction while avoiding the contact between the outer peripheral face of the stirring pin F2 and the end face 2 a. For example, the inclination angle α is determined based on the design concept of a rotary tool in the field of Friction Stir Welding (FSW), and the inclination angle β is determined based on the design concept of a die in the casting field (e.g., die casting). That is, since both the inclination angles α and β are optimum values according to design ideas, it is sometimes difficult to make "α" equal to β ". However, according to the present embodiment, since the tilt angles α and β can be freely selected, the optimum values can be selected as the tilt angles α and β. Further, according to the present embodiment, the work of bringing the outer peripheral surface of the rotary tool F and the second metal member 2 close to each other as much as possible is facilitated in a state where the outer peripheral surface and the two are not in contact with each other.
[ second embodiment ]
A method for manufacturing a clad rolled material according to a second embodiment of the present invention will be described. In the method for manufacturing a composite rolled material according to the present embodiment, a preparation step, a butt joint step, a joining step, and a rolling step are performed.
In the preparation step, as shown in fig. 9, a step pedestal KA is prepared. The step mount KA has a bottom K1, a bottom K2 located one step higher than the bottom K1, and a step side K3.
As shown in fig. 9, in the butt joint process, the end portions of the first metal member 1 and the second metal member 2 are butted against each other. The first metal member 1 is disposed at the bottom K1, and the end surface 1a of the first metal member 1 is brought into contact with the step side surface K3. The butting portion J is formed by butting the first metal member 1 and the second metal member 2. As in the first embodiment, the butting portion J is formed with a gap having a V-shaped cross section. In a state where the first metal member 1 is butted against the second metal member 2, the front surface 1b of the first metal member 1 is located at a higher position than the front surface 2b of the second metal member 2, and the back surface 1c of the first metal member 1 is located at a lower position than the back surface 2c of the second metal member 2.
As shown in fig. 10, the joining step is a step of joining the first metal member 1 and the second metal member 2 using a rotary tool F. In the joining step, friction stirring is performed in the same manner as in the first embodiment. That is, the rotary tool F is inserted into the front surface 1b of the first metal member 1 and set at a start position near the butting portion J while rotating the stirring pin F2 of the rotary tool F. Then, the rotary tool F is relatively moved in parallel to the extending direction of the butting portion J in a state where the rotary tool F is inclined toward the first metal member 1 by the inclination angle γ. The rotary tool F may slightly contact the second metal member 2, but in the present embodiment, friction stirring is performed in a state of contacting only the first metal member 1. The plasticized region W is formed on the moving trajectory of the rotary tool F. In the joining step, friction stir joining is mainly performed so that the plastic fluidizing material on the first metal member 1 side flows into the gap of the butting portion J.
In the joining step of the present embodiment, the insertion depth of the stirring pin F2 is set so that the tip (flat surface F3) of the stirring pin F2 of the rotary tool F is positioned below the back surface 2c of the second metal member 2. The rolling step is the same as in the first embodiment.
In the second embodiment described above, substantially the same effects as those of the first embodiment can be obtained. In the first embodiment, as shown in fig. 5, it is difficult to bond the second metal member 2 over the entire height direction thereof. However, in the second embodiment, since the friction stir welding is performed in a state where the stirring pin F2 is inserted to a position deeper than the back surface 2c of the second metal member 2, the welding can be performed over the entire thickness direction of the second metal member 2 as shown in fig. 11. This can improve the bonding strength between the first metal member 1 and the second metal member 2.
(symbol description)
1 first Metal Member
2 second metal member
F rotary tool
F1 joint part
F2 stirring pin
Flat face of F3
J butt joint part
W plasticized region.
Claims (7)
1. A joining method for joining a pair of metal members different in material using a rotary tool including a stirring pin tapered at a leading end, characterized by comprising:
a preparation step of preparing a first metal member having a vertical surface at an end portion thereof and a second metal member having an inclined surface at an end portion thereof, the second metal member having a melting point higher than that of the first metal member and having a plate thickness smaller than that of the first metal member;
a butting step of butting an end of the first metal member and an end of the second metal member against each other to form a butting portion having a V-shaped gap; and
a joining step of inserting the rotating tool that rotates from only the front surface of the first metal member and relatively moving the rotating tool along the abutting portion in a state where only the stirring pin is in contact with at least the first metal member to join the first metal member and the second metal member,
in the joining step, the joining is performed in a state where γ is α - β, where γ is an inclination angle of a rotation central axis of the rotary tool with respect to a plumb bob surface, β is an inclination angle of the inclined surface with respect to the plumb bob surface, and α is an inclination angle of the outer peripheral surface of the stirring pin with respect to the rotation central axis.
2. The joining method according to claim 1,
in the butting step, the first metal member and the second metal member are butted against each other in a state where the back surface of the first metal member and the back surface of the second metal member are coplanar with each other.
3. The joining method according to claim 1,
in the butt joint step, the first metal member and the second metal member are butted together such that the back surface of the first metal member is positioned lower than the back surface of the second metal member and the front surface of the first metal member is positioned higher than the front surface of the second metal member,
in the joining step, the insertion depth of the stirring pin is set so that the tip of the stirring pin is positioned below the height of the back surface of the second metal member.
4. The joining method according to claim 1,
in the joining step, the rotation direction and the advancing method of the rotary tool are set so that the second metal member side is a shear side and the first metal member side is a flow side in a plasticized region formed in the movement locus of the rotary tool.
5. The joining method according to claim 1,
in the preparation process, the first metal member is formed of aluminum or an aluminum alloy, and the second metal member is formed of copper or a copper alloy,
in the joining step, the rotary tool is relatively moved along the abutting portion in a state where only the stirring pin is brought into contact with only the first metal member, so that the first metal member and the second metal member are joined.
6. The joining method according to claim 1,
in the above-mentioned joining step, the adhesive is applied to the substrate,
rotating the rotary tool to the right when a spiral groove that winds to the left from the base end toward the tip end is formed on the outer peripheral surface of the rotary tool,
when a spiral groove that spirals rightward from the base end toward the tip end is formed on the outer peripheral surface of the rotary tool, the rotary tool is rotated leftward.
7. A method of manufacturing a clad-rolled material formed of a pair of metal members different in material, comprising:
a preparation step of preparing a first metal member having a vertical surface at an end portion and a second metal member having an inclined surface at an end portion, the second metal member having a melting point higher than that of the first metal member and a plate thickness smaller than that of the first metal member;
a butting step of butting an end of the first metal member and an end of the second metal member against each other to form a butting portion having a V-shaped gap; and
a joining step of inserting the rotating tool that rotates from only the front surface of the first metal member and relatively moving the rotating tool along the abutting portion in a state where only the stirring pin is in contact with at least the first metal member to join the first metal member and the second metal member; and
a rolling step of rolling the metal members joined in the joining step in a rolling direction of the joined line,
in the joining step, the joining is performed in a state where γ is α - β, where γ is an inclination angle of a rotation central axis of the rotary tool with respect to a plumb bob surface, β is an inclination angle of the inclined surface with respect to the plumb bob surface, and α is an inclination angle of the outer peripheral surface of the stirring pin with respect to the rotation central axis.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-174167 | 2018-09-18 | ||
| JP2018174167A JP2020044545A (en) | 2018-09-18 | 2018-09-18 | Joining method and manufacturing method of composite rolling material |
| PCT/JP2019/022298 WO2020059218A1 (en) | 2018-09-18 | 2019-06-05 | Welding method and method for producing composite rolled material |
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| Publication Number | Publication Date |
|---|---|
| CN112105480A true CN112105480A (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980031333.1A Pending CN112105480A (en) | 2018-09-18 | 2019-06-05 | Joining method and method for manufacturing composite rolled material |
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| Country | Link |
|---|---|
| JP (1) | JP2020044545A (en) |
| CN (1) | CN112105480A (en) |
| WO (1) | WO2020059218A1 (en) |
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| WO2020059218A1 (en) | 2020-03-26 |
| JP2020044545A (en) | 2020-03-26 |
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