WO2013058086A1 - Method for manufacturing lidded container and joining method - Google Patents

Abstract

The present invention addresses the problem of providing a method for manufacturing a lidded container, the method capable of reducing the imbalance of the strength of the lidded container. A method for manufacturing a lidded container is characterized by comprising: a preparation step for preparing a body part (2) which is provided with a bottom section (11) and a sidewall section (12) having a rectangular frame shape in plan view and provided to stand on the bottom section (11), and a lid part (3) which covers an opening (5) of the body part (2); and a friction welding step for performing friction welding by forming a butting section by causing the upper surface of the sidewall part (12) and the lower surface of the lid part (3) to butt against each other, and at the same time relatively and linearly moving the body part (2) and the lid part (3) back and force along a reference line inclined with respect to one side of the butting section.

Description

Manufacturing method and joining method of container with lid

The present invention relates to a method for manufacturing a lidded container and a joining method.

For example, Patent Literatures 1 and 2 disclose a method of joining cylindrical metal members together by friction welding. In this joining method, the end faces of a pair of cylindrical metal members are rotated in a high speed around the central axis while pressing the end faces close to each other, thereby generating frictional heat on the joining surfaces and joining both the members. is there. In the conventional joining method, since the end surfaces of the metal members have a circular shape, if the metal member is rotated around the central axis, frictional heat can be generated without deviation.

On the other hand, friction welding has the advantage that the distortion of the workpiece is small and the processing speed is high. However, although friction welding is a solid phase bonding, it involves a dynamic process, so that there is a problem that water tightness and air tightness at the joint are likely to be unstable, and burrs are generated at the joint. For example, Patent Document 2 proposes an outer burr cutting device for a friction welding machine that has been improved so that the cutting blade can be automatically positioned with respect to the outer burr.

JP 2009-107006 A Japanese Patent Application Laid-Open No. 07-51902 JP 2005-251595 A Japanese Patent Laid-Open No. 08-215863

Here, FIG. 32 is a diagram for explaining the problem, in which (a) is an exploded perspective view before joining, and (b) is a schematic plan view after joining. Here, a case where a body with a rectangular shape in plan view 201 and a lid portion 202 with a rectangular shape in plan view are joined by friction welding to manufacture a container with a lid is illustrated. The main body portion 201 includes a bottom portion 203 and a frame-like side wall portion 204 erected from an end portion of the bottom portion 203. The lid portion 202 is a plate-like member that covers the opening of the main body portion 201.

When performing friction welding on a rectangular member in plan view, the metal members cannot be rotated as in the conventional case. Therefore, after the upper surface of the side wall part 204 and the lower surface of the lid part 202 are abutted, for example, as shown in FIG. 32 (b), the main body part 201 is parallel to the extending direction of the long side of the side wall part 204. It is conceivable that the lid portion 202 and the lid portion 202 are relatively reciprocated to be joined.

Measured tensile strength at points M and N of the lidded container joined in this way was found to be considerably lower than that at point N. This is considered to be because the difference in frictional heat generated during friction welding is large between the M point and the N point, which also affects the bonding strength.

Furthermore, when the airtightness of the lidded container thus joined was measured, it was found that the airtightness was considerably low. This is considered that the difference in the distance of wear powder movement during friction welding between the M point and the N point is large, which also affects the airtightness.

On the other hand, in Patent Document 3, prior to removing burrs by cutting, the entire burrs are induction-heated to high temperatures by high-frequency induction heating, and then high-frequency induction heating that enables easy and efficient cutting and removal of burrs thereafter. Coil devices have been proposed.

Furthermore, a method for eliminating the need to remove burrs that occur during friction welding has been proposed. For example, in Patent Document 4, in a friction welding method in which a pair of base materials gripped opposite to each other are brought into contact with each other while being rotated relative to each other to generate heat, and after the base material contact end portion is melted, the base materials are further pressed and joined together. There has been proposed a friction welding method including a step of pressing and forming a burr generated at a base material joint when the base materials are pressed against each other in a direction in which the burrs are generated.

However, in these methods, the mechanism of the apparatus for realizing the method is complicated, and the number of processes is increased by one, resulting in an increase in cost.

From this point of view, the present invention can reduce the strength imbalance at each joint site of the lidded container, and improve the watertightness and airtightness of the lidded container. It is an issue to provide. Moreover, this invention makes it a subject to provide the joining method which can aim at the improvement of joining quality simultaneously, removing the burr | flash which generate | occur | produced by friction welding.

In order to solve such a problem, the present invention includes a main body portion including a bottom portion and a side wall portion having a rectangular frame shape in a plan view standing on the bottom portion, and a lid portion that closes an opening of the main body portion. The preparatory step to be prepared, and the upper surface of the side wall portion and the lower surface of the lid portion are abutted to form a butted portion, and when viewed in plan, along the reference line that is inclined with respect to one side of the butted portion And a friction welding process in which the main body and the lid are reciprocated relative and linearly to perform friction welding.

According to such a manufacturing method, the difference in frictional heat at each joining portion can be reduced by moving the members linearly obliquely in the friction welding process, and consequently, the strength imbalance at each joining portion of the lidded container. Can be reduced. Furthermore, by moving the members linearly obliquely in the friction welding process, it is possible to reduce the difference in the abrasion powder movement distance at each joint site, and thus improve the water tightness and air tightness of the lidded container. .

Moreover, when the said abutting part exhibits square shape in the said friction welding process, it is preferable to set the said reference line in the range of +/- 30 degree with respect to the diagonal of the said abutting part.
Moreover, when the said abutting part exhibits a rectangular shape in the said friction welding process, it is preferable to set the said reference line in the range of +/- 20 degrees with respect to the diagonal of the said abutting part.
In the friction welding process, it is preferable that the reference line is set to be parallel to the diagonal line of the abutting portion.

According to this manufacturing method, when the main body portion and the lid are friction-welded, it is possible to reduce the frictional heat imbalance generated at each joint portion, and the strength imbalance at each joint portion of the lidded container. Can be made smaller.

In the friction welding process, an angle formed between one side of the abutting portion and the reference line is preferably set to 35 ° to 55 °, more preferably set to 40 ° to 50 °, and more preferably 45 °. Most preferably, it is set.

According to this manufacturing method, when the main body portion and the lid are friction-welded, it is possible to reduce the imbalance of the abrasion powder movement distance at each joint portion, and improve the water tightness and air tightness of the lidded container. be able to.

Further, a main body groove formed in a rectangular frame shape in plan view, a main body inner peripheral surface formed inside the main body groove, and an outer side of the main body groove on the upper surface of the side wall. And a main body outer peripheral surface formed at a position lower than the inner peripheral surface. In the friction welding process, it is preferable that the inner peripheral surface of the main body and the lower surface of the lid portion are abutted.
Further, on the lower surface of the lid portion, a lid concave groove portion formed in a rectangular frame shape in plan view, a lid inner peripheral surface formed on the inner side of the lid concave groove portion, and an outer side of the lid concave groove portion, the lid The lid outer peripheral surface formed at a position higher than the inner peripheral surface is formed, and it is preferable that the upper surface of the side wall portion and the lid inner peripheral surface are abutted in the friction welding process.

According to such a manufacturing method, since the burrs formed by friction welding are stored in the respective recessed groove portions, labor for cutting the burrs can be omitted.

The present invention also provides a friction welding process for friction welding the first metal member and the second metal member, and a burr generated on at least one outer surface of the first metal member and the second metal member. And a welding step of welding the outer surfaces to each other.

Further, it is preferable that a recess is formed on at least one of the opposing surfaces of the first metal member and the second metal member. According to this structure, the watertightness and airtightness of the hollow container comprised with a 1st metal member and a 2nd metal member can be improved.

In the welding process, it is preferable to perform laser welding. According to this structure, a welding process can be performed easily.

The first metal member and the second metal member are preferably made of aluminum or an aluminum alloy. According to this configuration, a hollow container that is lightweight and excellent in corrosion resistance can be manufactured.

Friction welding is a solid-phase welding but involves a dynamic process, so the water-tightness and air-tightness at the joint are likely to be unstable, and there is a problem that burrs are generated at the joint, but the quality of the joint is There is an advantage that it is hardly affected by a cast hole inside the material to be joined, a gap at the butt surface, an oxide film, dirt, and the like.

On the other hand, welding involves melting of the surface of the material to be joined and the material to be joined by a heat source such as an arc or laser. Although there is a problem of being easily affected, there are advantages that the water tightness and air tightness are improved and the joint surface is relatively smooth.

Therefore, the inventor of the present invention devised a process that can compensate for the mutual technical problems of friction welding and welding while maximizing the mutual advantages of friction welding and welding. We have succeeded in significantly improving the quality (tightness).

According to the method for manufacturing a container with a lid according to the present invention, it is possible to reduce an imbalance in strength at each joint site of the container with a lid, and to improve the water tightness and air tightness of the container with a lid. Further, according to the joining method according to the present invention, it is possible to improve the joining quality while removing the burrs generated by the friction welding.

It is a disassembled perspective view of the container with a lid concerning a first embodiment of the present invention. It is sectional drawing of the main-body part which concerns on 1st embodiment. It is a perspective view of the lid part concerning a first embodiment. It is sectional drawing of the cover part which concerns on 1st embodiment. It is sectional drawing which shows the state matched in 1st embodiment. It is a top view which shows the friction welding process which concerns on 1st embodiment. It is sectional drawing which shows the container with a lid concerning 1st embodiment. It is a top view which shows the friction welding process which concerns on 2nd embodiment of this invention. It is a figure which shows a 1st modification, Comprising: (a) shows before joining, (b) shows after joining. It is a figure which shows a 2nd modification, Comprising: (a) shows before joining, (b) shows after joining. It is a figure which shows a 3rd modification, Comprising: (a) shows before joining, (b) shows after joining. It is a disassembled perspective view of the container with a lid concerning a third embodiment of the present invention. It is sectional drawing of the container with a lid concerning 3rd embodiment. (A) is a top view of the container with a lid concerning a 4th embodiment of the present invention, and (b) shows a sectional view of a container with a lid concerning a 4th embodiment. It is a perspective view of the 1st metal member and 2nd metal member which concern on 5th embodiment of this invention. (A) is sectional drawing which shows the friction welding process which concerns on 5th embodiment, (b) is sectional drawing which shows the welding process which concerns on this embodiment. It is a figure for demonstrating Example 1, Comprising: (a) is a top view, (b) is the graph which showed the relationship between a friction angle and tensile strength. It is a figure for demonstrating Example 2, Comprising: (a) is a top view, (b) is the graph which showed the relationship between a friction angle and tensile strength. It is sectional drawing of the butt | matching part in each condition of Example 2. FIG. 10 is a table summarizing the joining conditions of Example 3. It is a graph which shows the relationship between the friction angle in Example 3, and a pressure fall rate, Comprising: (a) shows the result of a rectangular test body, (b) shows the result of a square test body. It is a table | surface which shows the precondition for calculating the relationship between the area of an intermittent friction part, and a friction angle, and the relationship between abrasion powder moving distance and a friction angle. It is a figure for demonstrating an intermittent friction part, Comprising: (a) is a schematic plan view of the state which face | matched the main-body part and the cover part, (b) is with respect to the main-body part in the A part of (a). It is an expansion model top view in the state where the lid part was moved. (A) is a graph which shows the relationship between the area and friction angle of an intermittent friction part at the time of carrying out friction welding of the main-body part and lid | cover of a rectangular container (the aspect ratio of a long side and a short side is 3: 1), (b ) Is a graph showing the relationship between the area of the intermittent friction portion and the friction angle when the main body portion of the square container and the lid are friction-welded. It is a figure for demonstrating a wear powder movement distance, Comprising: It is an expansion schematic top view of the state which moved the cover part with respect to the main-body part in the A section of (a) of FIG. (A) is a graph showing the relationship between the abrasion powder moving distance and the friction angle when the main body of the rectangular container (the aspect ratio between the long side and the short side is 3: 1) and the lid are friction-welded, and (b) These are graphs which show the relationship between the abrasion powder moving distance and the friction angle when the main body of the square container and the lid are friction-welded. FIG. 6 is a diagram illustrating specimens G and H according to Example 4, where (a) is a plan view and (b) is a cross-sectional view taken along the line II of (a). FIG. 4 is a view showing test bodies I to M according to Example 4, where (a) is a plan view and (b) is a cross-sectional view taken along line II-II of (a). (A) shows the welding conditions of the test bodies G and H, (b) shows the welding conditions of the test bodies I and K, and (c) shows the welding conditions of the test bodies L and M. (A) is a schematic cross-sectional view of a healthy part after the friction welding process of the test body G. FIG. (B) is a schematic cross-sectional view of a portion including a bonding defect after the friction welding process of the test body G. FIG. (C) is a schematic cross-sectional view after the welding process of the specimen G. It is a table | surface which shows the conditions of Example 4, and a pressure fall rate. It is a figure for demonstrating a subject, Comprising: (a) is a disassembled perspective view before joining, (b) is a schematic plan view after joining.

[First embodiment]
The manufacturing method of the lidded container of embodiment of this invention is demonstrated in detail with reference to drawings. The container with a lid according to the present embodiment is a component of a cooling system mounted on an electronic device such as a personal computer and is a component that cools a CPU (electronic component) or the like. By flowing cooling water inside the lidded container, the heat of the CPU can be lowered.

The container 1 with a lid has a main body 2 and a lid 3 as shown in FIG. The main body 2 and the lid 3 are both made of an aluminum alloy. The main body 2 and the lid 3 may be made of any material capable of friction welding, and may be other metal materials or resins. First, the structure of the main-body part 2 and the cover part 3 before manufacture is demonstrated. The main body 2 and the lid 3 are formed by cutting using, for example, a ball mill or an end mill.

The main body 2 has a rectangular shape in plan view, as shown in FIG. The main body 2 includes a box-shaped member 4, an opening 5 formed in the box-shaped member 4, and a plurality of fins 6 formed inside the box-shaped member 4. The box-shaped member 4 is composed of a bottom portion 11 and a frame-like side wall portion 12 erected on the bottom portion 11. The main body 2 has an aspect ratio (aspect ratio) of 3: 1.

The side wall portion 12 is composed of four side walls, and each side wall has an equivalent cross-sectional shape. As shown in FIG. 2, the side wall portion 12 includes an inner surface 13, an outer surface 14, and an upper surface 15. The inner surface 13 and the outer surface 14 are perpendicular to the bottom portion 11. On the upper surface 15, a main body inner peripheral surface 16 formed around the opening 5, a main body concave groove portion 17 formed outside the main body inner peripheral surface 16, and a main body outer peripheral surface formed outside the main body concave groove portion 17. 18 are formed.

The main body inner peripheral surface 16 is formed around the opening 5 in a rectangular frame shape in plan view. The body peripheral surface 16 is a horizontal plane and is formed with a certain width.

The main body concave groove portion 17 is a groove formed in a rectangular frame shape along the periphery of the inner peripheral surface 16 of the main body. The main body concave groove portion 17 is formed in a semicircular shape in a cross-sectional view, and the upper side is open.

The main body outer peripheral surface 18 is formed in a frame shape having a rectangular shape in plan view along the periphery of the main body concave groove portion 17. The main body outer peripheral surface 18 is a horizontal surface and is formed with a certain width. The main body outer peripheral surface 18 is formed at a position one step lower than the main body inner peripheral surface 16.

The fin 6 has a plate shape and is erected vertically on the upper surface of the bottom portion 11. In the present embodiment, six fins 6 are provided, and are arranged in parallel with a gap therebetween. The number of fins 6 is not limited.

The lid 3 has a rectangular shape in plan view as shown in FIGS. 3 and 4 and has the same size as the main body 2. The lid 3 has a plate shape and includes an upper surface 21, four side surfaces 22, and a lower surface 23. The lower surface 23 includes a lid central surface 24 formed in the center, a lid inner concave groove portion 25 formed around the lid central surface 24, and a lid inner peripheral surface 26 formed around the lid inner concave groove portion 25. A lid outer concave groove portion 27 formed around the lid inner peripheral surface 26 and a lid outer peripheral surface 28 formed around the lid outer concave groove portion 27 are formed.

The lid center surface 24 has a rectangular shape in plan view and is formed at the center of the lid 3. The lid center surface 24 is a horizontal plane. The lid inner concave groove portion 25 is a groove formed in a frame shape along the periphery of the lid center surface 24. The lid inner concave groove portion 25 is formed in a semicircular shape in cross-sectional view, and the lower side is opened.

The lid inner peripheral surface 26 is formed in a rectangular frame shape in plan view along the periphery of the lid inner concave groove portion 25. The lid inner peripheral surface 26 is a horizontal plane. The shape and width of the lid inner peripheral surface 26 are the same as those of the main body inner peripheral surface 16. That is, the lid inner peripheral surface 26 and the main body inner peripheral surface 16 are in surface contact with each other without excess or deficiency. The lid inner peripheral surface 26 is formed at a position one step lower than the lid central surface 24.

The lid outer concave groove portion 27 is a groove formed in a rectangular frame shape along a periphery of the lid inner peripheral surface 26. The lid outer recessed groove portion 27 is formed in a semicircular shape when viewed in cross section, and the lower side is opened.

The lid outer peripheral surface 28 is formed in a rectangular frame shape in plan view along the periphery of the lid outer groove portion 27. The lid outer peripheral surface 28 is a horizontal plane. The shape and width of the lid outer peripheral surface 28 are the same as those of the main body outer peripheral surface 18. The lid outer peripheral surface 28 is formed at the same height as the lid central surface 24.

Next, a specific joining method will be described. The manufacturing method of the container with a lid concerning this embodiment performs a preparatory process and a friction welding process.

In the preparation step, the metal member is processed to prepare the main body 2 and the lid 3 described above.

In the friction welding process, as shown in FIG. 5, after fixing the main body 2 and the lid 3 to a friction welding apparatus (not shown) with a jig, the inner peripheral surface 16 of the side wall 12 and the lid 3 is brought into surface contact with the inner peripheral surface 26 of the lid. The part where the body inner circumferential surface 16 and the lid inner circumferential surface 26 are abutted is also referred to as a “butting portion J”. The abutting portion J has a rectangular frame shape in plan view, and is substantially similar to the outer shapes of the main body portion 2 and the lid portion 3.

In the friction welding process, a friction process and a pressure welding process are performed. In the friction process, as shown in FIG. 6, along the reference line C <b> 3 that is inclined with respect to one side of the abutting portion J when viewed in plan while pressing the main body portion 2 and the lid portion 3 in the direction approaching each other. The main body 2 and the lid 3 are reciprocated relative and linearly. In the present embodiment, the reference line C3 is set to be parallel to the diagonal line of the abutting portion J.

In this embodiment, the main body 2 is not moved, and only the lid 3 is linearly reciprocated. The conditions in the friction process may be set as appropriate. For example, the frequency is set to 50 Hz, the amplitude is 2.0 mm, and the friction pressure is 40 MPa. The time for the friction process is set to about 5 to 10 seconds.

In the present embodiment, the reference line C3 is set to be parallel to the diagonal line of the abutting portion J, but the present invention is not limited to this. Here, as shown in FIG. 6, the position of the center line C1 passing through the center in the front-rear direction of the abutting portion J is 0 °, the position of the center line C2 passing through the center in the left-right direction of the abutting portion J is 90 °, and the center line The angle from C1 to the reference line C3 is defined as a friction angle α. The reference line C3 in the friction process may be set so that the friction angle α is other than 0 ° or 90 °.

That is, what is necessary is just to set the friction angle (alpha) so that the moving direction of any one of the main-body part 2 and the cover part 3 may become diagonal with respect to the one side which comprises the abutting part J. FIG. The reference line C3 is preferably set within a range of ± 20 ° with respect to the diagonal line of the abutting portion J when the abutting portion J has a rectangular shape in plan view, and is ± 10 ° with respect to the diagonal line of the abutting portion J. More preferably, it is set within the range, and most preferably, it is set parallel to the diagonal line.

In the pressure welding process, after the friction process is finished, the main body 2 and the lid 3 are pressed in directions approaching each other without relatively moving. The conditions in the pressure contact process may be set as appropriate, but for example, the pressure is set to 80 MPa. The time of the pressure welding process is set to about 3 to 5 seconds.

FIG. 7 is a cross-sectional view showing the lidded container according to the first embodiment. As shown in FIG. 7, frictional heat is generated at the abutting portion J by the friction process described above. Thereafter, the amplitude is stopped and the pressure is applied in the pressure contact process, whereby an intermolecular attractive force acts on the abutting portion J, and the main body inner peripheral surface 16 and the lid inner peripheral surface 26 are coupled. In the friction process, burrs P1 and P2 are generated by rubbing the inner peripheral surface 16 of the main body and the inner peripheral surface 26 of the lid. The burr P <b> 1 generated inside the abutting portion J is stored in a hollow portion formed by joining the main body portion 2 and the lid portion 3. On the other hand, the burrs P <b> 2 generated outside the abutting portion J are accommodated in a space surrounded by the main body concave groove portion 17 and the lid outer concave groove portion 27.

Since the burrs P1 and P2 are generated when the main body inner peripheral surface 16 and the lid inner peripheral surface 26 are rubbed together, the height of the main body inner peripheral surface 16 and the lid inner peripheral surface 26 is slightly reduced. Therefore, the lid center surface 24 and the upper surface of the fin 6 are in contact with each other, or close to each other with a minute gap. Further, the outer peripheral surface 18 of the main body and the outer peripheral surface 28 of the lid come into contact with each other or come close to each other with a fine gap. The reason why the inner peripheral surface 16 is positioned above the outer peripheral surface 18 of the main body and the inner peripheral surface 26 of the lid is positioned lower than the outer peripheral surface 28 of the lid is to secure a shrinkage allowance in the friction welding process. is there. The lidded container 1 is formed by the above steps.

According to the method for manufacturing a lidded container described above, the temperature imbalance of the frictional heat can be reduced by reciprocally moving the members back and forth in the friction welding process. The strength imbalance in can be reduced. The reason will be described later.

Further, since the burr P2 formed by the friction welding process is accommodated in the space surrounded by the main body concave groove portion 17 and the lid outer concave groove portion 27 while the main body outer peripheral surface 18 and the lid outer peripheral surface 28 are closed, the burr P2 Is not exposed to the outside. For this reason, the operation | work which removes the burr | flash P2 after joining can be skipped.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. As shown in FIG. 8, the method for manufacturing a lidded container according to the second embodiment is different from the first embodiment in that a lidded container 1A having a square shape in plan view is manufactured. The abutting portion J1 has a substantially square frame shape in plan view. Since it is the structure equivalent to 1st embodiment except the shape of 1 A of containers with a lid | cover, the same code | symbol is attached | subjected about the overlapping part and detailed description is abbreviate | omitted.

The manufacturing method of the container with a lid according to the present embodiment performs a preparation process and a friction welding process. The preparation process is performed in the same manner as in the first embodiment.

In the friction welding process, as shown in FIG. 8, when the main body 2 and the lid 3 are pressed in a direction close to each other and viewed in a plan view, the reference line C3 is inclined with respect to one side of the abutting portion J1. The main body 2 and the lid 3 are reciprocated relatively and linearly along. In the present embodiment, the reference line C3 is set to be parallel to the diagonal line of the abutting portion J1. In the present embodiment, since the abutting portion J1 has a square shape (the ratio of lengths between adjacent sides is 1: 1), the friction angle is 45 °.

As described above, even when the ratio of the adjacent sides among the sides constituting the abutting portion J1 is equal, the same effect as that of the first embodiment can be obtained.

The reference line C3 is preferably set within a range of ± 30 ° with respect to the diagonal line of the abutting portion J when the abutting portion J has a rectangular shape in plan view, and ± 20 with respect to the diagonal line of the abutting portion J. More preferably, it is set within the range of °, and most preferably, it is set parallel to the diagonal line.

Next, a modified example of the present invention will be described. The shapes of the main body 2 and the lid 3 are not limited to those in the first embodiment, and may be modified examples 1 to 3, for example.

[Modification 1]
As shown to (a) of FIG. 9, although the main-body part 2 of the modification 1 is equivalent to 1st embodiment, it differs from 1st embodiment by the point that the lower surface 23 of the cover part 3 is smooth. As shown in FIG. 9B, the burr P1 generated by the friction welding process is housed in a hollow portion formed by joining the main body 2 and the lid 3 and the burr P2 is stored in the main body groove 17. Stored. According to the first modification, the outer peripheral surface 18 and the lower surface 23 of the main body are closed, and the burr P2 is stored in the main body concave groove portion 17, so that the cutting work of the burr P2 can be omitted. Moreover, since it is not necessary to form a ditch | groove part in the lower surface 23 of the cover part 3, an operation | work effort can be skipped.

[Modification 2]
As shown in FIG. 10 (a), the lid 3 of Modification 2 is the same as that of the first embodiment, but is different from that of the first embodiment in that the upper surface 15 of the side wall 12 of the main body 2 is smooth. Is different. As shown in FIG. 10B, the burr P <b> 1 generated by the friction welding process is accommodated in a hollow portion formed by joining the main body 2 and the lid 3. Further, the burr P <b> 2 is accommodated in the lid outer recessed groove portion 27. According to the second modification, the upper surface 15 and the lid outer peripheral surface 28 are closed, and the burr P2 is housed in the lid outer groove 27, so that the burr cutting operation can be omitted. Moreover, since it is not necessary to form a ditch | groove part etc. in the upper surface 15 of the side wall part 12, an operation | work effort can be skipped.

[Modification 3]
As shown to (a) of FIG. 11, while the upper surface 15 of the side wall part 12 of the modification 3 is smooth, it differs from 1st embodiment by the point that the lower surface 23 of the cover part 3 is also smooth. As shown in FIG. 11B, the burr P <b> 1 generated by the friction welding process is stored in a hollow portion formed by joining the main body 2 and the lid 3, and the burr P <b> 2 is the outer surface of the side wall 12. 14 and the outside of the side surface 22 of the lid 3. The burr P2 is cut after performing the friction welding process. According to the modification 3, since it is not necessary to form a ditch | groove part etc. in the upper surface 15 of the side wall part 12, or the lower surface 23 of the cover part 3, an operation | work effort can be skipped.

[Third embodiment]
Next, a third embodiment of the present invention will be described. As shown in FIG. 12, the lidded container 1 </ b> B according to the third embodiment is manufactured by joining a main body 2 and a lid 3 having substantially the same shape. First, the outline of the main body 2 and the lid 3 will be described.

The main body 2 includes a bottom 11 and a side wall 12 standing on the bottom 11. The side wall portion 12 has a rectangular frame shape in plan view. The aspect ratio of the side wall 12 is not particularly limited, but is 3: 1 in the present embodiment. The wall thickness T1 of the side wall portion 12 has the same dimensions on all four sides. Rounded chamfered chamfers 31 are formed at the four outer corners of the side wall 12. The chamfered portion 31 is formed over the entire length in the height direction.

The lid part 3 is composed of a bottom part 11 and a side wall part 12 erected on the bottom part 11. The side wall portion 12 has a rectangular frame shape in plan view. The lid 3 has the same shape as the main body 2 except that the height of the side wall 12 is about half the height of the side wall 12 of the main body 2.

As shown in FIG. 13, in the friction welding process, the upper surface (end surface) of the side wall portion 12 of the main body portion 2 and the lower surface (end surface) of the side wall portion 12 of the lid portion 3 are abutted to form an abutting portion J2. The outer surfaces of the side wall portions 12 and 12 are made to be flush with each other. The planar shape of the abutting portion J <b> 2 is the same shape as the end surface of the side wall portion 12.

Also, in the friction welding process, as in the first embodiment, it is reciprocated obliquely with respect to one side of the abutting portion J2. According to the method for manufacturing a container with a lid according to the third embodiment, substantially the same effect as that of the first embodiment can be obtained. Moreover, since the recessed part is formed not only in the main-body part 2 but in the cover part 3, the container with a lid | cover provided with the larger hollow part can be manufactured.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described. As shown in FIGS. 14A and 14B, the lidded container 1C according to the fourth embodiment is different from the third embodiment in that the planar shape is substantially square.

The main body 2 includes a bottom 11 and a side wall 12 standing on the bottom 11. The side wall portion 12 has a square frame shape in plan view. The wall thickness T1 of the side wall portion 12 has the same dimensions on all four sides. Rounded chamfered chamfers 31 are formed at the four outer corners of the side wall 12. The chamfered portion 31 is formed over the entire length in the height direction.

The lid part 3 is composed of a bottom part 11 and a side wall part 12 erected on the bottom part 11. The side wall portion 12 has a square frame shape in plan view. The lid 3 has the same shape as the main body 2 except that the height of the side wall 12 is about half the height of the side wall 12 of the main body 2.

As shown in FIG. 14B, in the friction welding process, the upper surface (end surface) of the side wall portion 12 of the main body portion 2 and the lower surface (end surface) of the side wall portion 12 of the lid portion 3 are abutted to each other, and the abutting portion J2 Form. In the friction welding process, as in the first embodiment, it is reciprocated obliquely with respect to one side of the abutting portion J2.

According to the method for manufacturing a container with a lid according to the fourth embodiment, substantially the same effect as that of the first embodiment can be obtained. Moreover, since the recessed part is formed not only in the main-body part 2 but in the cover part 3, the container with a lid | cover provided with the larger hollow part can be manufactured.

In the lidded containers 1B and 1C according to the third embodiment and the fourth embodiment, the round chamfered chamfer 31 is provided, but other chamfering such as 45 ° chamfering may be performed. Further, it is not necessary to provide a chamfered portion.

In the third embodiment and the fourth embodiment, burrs are inevitably generated on the outer surfaces of the side wall portions 12 and 12 after the friction welding process. Although this burr may be excised with a cutter device or the like, for example, the outer surfaces may be welded using a burr as a filler material. By welding, burrs are removed, and the finished surface can be molded neatly. Even if there is a joint defect in the abutting portion J2 after the friction welding process, the joint defect can be repaired by welding. The type of welding is not particularly limited, but it is preferable to perform laser welding, for example.

[Fifth embodiment]
A joining method according to a fifth embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 15, the joining method according to the present embodiment exemplifies a case where a metal hollow container 101 having a hollow portion inside is manufactured. First, the first metal member 102 and the second metal member 103 to be joined will be described. In the following description, “upper” and “lower” are based on the states of FIGS. 15 and 16, but are for convenience and do not limit the direction during friction welding or welding.

As shown in FIG. 15, the first metal member 102 includes a bottom portion 111 and a side wall portion 112 that stands vertically to the bottom portion 111. The side wall 112 has a rectangular frame shape in plan view, and its upper surface is flat. The dimension of the wall thickness T of the side wall 112 is the same for each wall. A recess 113 is formed in the center of the opposing surface of the first metal member 102 that faces the second metal member 103. In the present embodiment, the recess 113 is a hollow portion having a rectangular parallelepiped shape.

The second metal member 103 includes a bottom part 121 and a side wall part 122 that stands vertically to the bottom part 121. The second metal member 103 has the same shape as the first metal member 102. The side wall portion 122 has a rectangular frame shape in plan view, and its lower surface is flat. The dimension of the wall thickness T of the side wall 122 is the same for each wall. A recess 123 is formed in the center of the opposing surface of the second metal member 103 that faces the first metal member 102. In this embodiment, the concave portion 123 is a hollow portion having a rectangular parallelepiped shape. The first metal member 102 and the second metal member 103 are not particularly limited as long as they are materials capable of friction welding such as aluminum, aluminum alloy, and copper, but in the present embodiment, both are formed of an aluminum alloy.

Next, the joining method according to this embodiment will be described. In the joining method according to the present embodiment, a friction welding process and a welding process are performed.

In the friction welding process, as shown in FIG. 15, the first metal member 102 and the second metal member 103 are brought into contact with each other while the recess 113 of the first metal member 102 and the recess 123 of the second metal member 103 are opposed to each other. The Specifically, the upper surface of the side wall part 112 of the first metal member 102 and the lower surface of the side wall part 122 of the second metal member 103 are brought into surface contact. As a result, an abutting portion J having a frame shape in plan view is formed at the contact portion of each member (see FIG. 16A).

In the friction welding process, a friction process and a pressure welding process are performed. In the friction process, the first metal member 102 and the second metal member 103 are relatively reciprocated in a state where the first metal member 102 and the second metal member 103 are pressed in directions close to each other. The moving direction is not particularly limited, but in the present embodiment, the moving direction is linearly moved along a direction parallel to the long side portion of the side wall portion 112. In the present embodiment, the first metal member 102 is not moved, but only the second metal member 103 is linearly reciprocated.

The conditions in the friction process may be appropriately set. For example, the frequency is set to 100 to 260 Hz, the amplitude is set to 1.0 to 2.0 mm, and the friction pressure is set to 20 to 60 MPa. The time for the friction process is set to about 5 to 10 seconds.

In the pressure welding process, after the friction process is finished, the first metal member 102 and the second metal member 103 are pressed toward each other without being relatively moved. The conditions in the pressure contact process may be set as appropriate. For example, the pressure is set to 60 to 80 MPa. The time of the pressure welding process is set to about 3 to 5 seconds. By the friction welding process, burrs P are generated on the entire outer periphery or a part of the outer periphery on the outer surface 112a of the side wall 112 and the outer surface 122a of the side wall 122.

In the welding process, as shown in FIG. 16B, the outer surfaces 112 a and 122 a are welded using the burrs P and P as a filler material over the entire outer periphery of the side wall 112 and the side wall 122. The type of welding is not particularly limited, but laser welding is performed in this embodiment. After the welding process, a weld metal Q is formed on the outer surfaces 112a and 122a. As described above, the hollow container 101 having a hollow portion therein is manufactured.

According to the joining method according to the present embodiment described above, the burrs P are removed by welding the outer surfaces 112a and 122a to each other by using the burrs P and P inevitably generated in the friction welding process as a filler material. Bonding quality can be improved. Moreover, when manufacturing the hollow container 101 which has a hollow part inside like this embodiment, improving the water-tightness and airtightness of the hollow container 101 by performing a welding process in addition to a friction welding process. Can do.

In addition, according to the present embodiment, the burr cutting step that has been conventionally performed can be omitted. Further, laser welding can be performed easily in the welding process, and the finished surface can be made clean. Even if a joint defect occurs in the friction welding process, the joint defect can be repaired in the welding process.

Friction welding is a solid-phase welding but involves a dynamic process, so the water-tightness and air-tightness at the joint are likely to be unstable, and there is a problem that burrs are generated at the joint, but the quality of the joint is There is an advantage that it is hardly affected by a cast hole inside the material to be joined, a gap at the butt surface, an oxide film, dirt, and the like.

On the other hand, since welding involves melting of the surface of the material to be joined and the material to be joined by a heat source such as an arc or laser, the joining quality is such as a cast hole inside the material to be joined, a gap in the butt surface, an oxide film, dirt, etc. Although there is a problem of being easily affected, there are advantages that the water tightness and air tightness are improved and the joint surface is relatively smooth.

As in the invention of the present application, by performing friction welding first, it is possible to obtain a bonded portion having high bonding strength and relatively good bonding quality. Next, by welding to the outer surface of the joint portion, the burrs generated on the outer surface can be welded as a filler material, and the water-tightness and air-tightness are further improved, and the outer surface Becomes relatively smooth.

Even if there is a cast hole inside the material to be joined, or a gap, oxide film, dirt, etc. exist on the butt surface before friction welding, these defects are caused by material agitation by friction welding. It is crushed or finely and evenly distributed. For this reason, generation | occurrence | production of welding defects, such as a blowhole, can be suppressed in a welding process. Moreover, even if the penetration in the welding process is not sufficient, the water tightness and the air tightness are further improved.

Also, especially in the case of laser welding, there are advantages in common with friction welding, in which the distortion of the workpiece is small and the processing speed is high. In other words, in the present invention, a hollow container having higher quality water tightness and air tightness is manufactured by making mutual use of the mutual advantages of the friction welding process and the welding process while mutually complementing each other. be able to.

Although the embodiment of the present invention has been described above, it is not limited to the above-described joining method. For example, in this embodiment, the welding process is performed using the burrs P on both the outer surface 112a of the side wall 112 and the outer surface 122a of the side wall 122, but the burrs are applied only to one of the outer surface 112a and the outer surface 122a. When P does not occur, a welding process may be performed using the burr P.

In the present embodiment, the first metal member 102 and the second metal member 103 have the recesses 113 and 123, respectively. However, any one of the recesses 113 and 123 may be provided. Specifically, for example, the present invention may be applied when a hollow container with a lid is manufactured by friction-welding the first metal member 102 and a metal plate. Further, the shape of the recesses 113 and 123 is not limited to a rectangular parallelepiped, but may be other shapes.

Further, the present invention may be applied to a case where metal members not having a recess are joined together to produce a product having no hollow part. Further, in this embodiment, the amplitude direction in the friction welding process is set to be parallel to the long side portions of the side wall portions 112 and 122, but may be set to be parallel to the short side portion, You may set diagonally with respect to a long side part. In the present embodiment, the moving direction in the friction welding process is set to be linear. However, for example, when joining cylindrical or cylindrical metal members, the metal members are rotated to perform the friction welding process. May be.

Next, examples of the present invention will be described. In the example, the container with lid 1, 1 </ b> A was manufactured by changing the angle of the reference line C <b> 3 in the friction welding process, and a part of each butt portion J, J <b> 1 was sampled to perform a tensile test.

[Example 1]
In Example 1, as shown to (a) of FIG. 17, it tested about the container 1 with a lid | cover which becomes a rectangle in planar view. The aspect ratio (aspect ratio) of the abutting portion J is 3: 1. In Example 1, the main body 2 was formed of an aluminum alloy ADC12 (JIS). JIS: ADC12: Cu; 1.5 to 3.5%, Si; 9.6 to 12.0%, Mg; 0.3% or less, Zn; 1.0% or less, Fe; 1.3% or less Mn: 0.5% or less, Ni: 0.5% or less, Ti: 0.3% or less, Pb: 0.2% or less, Sn: 0.2% or less, Al: balance.

In Example 1, the lid 3 was formed of aluminum alloy A5052 (JIS). JIS: A5052 is Si: 0.25% or less, Fe: 0.40% or less, Cu: 0.10% or less, Mn: 0.10% or less, Mg: 2.2 to 2.8%, Cr0. 15 to 0.35%, Zn: 0.10% or less, others: 0.15% or less, Al: balance.

In Example 1, four specimens were prepared, and the friction angle α (angle from the center line C1 to the reference line C3) was set to 0 °, 15 °, 45 °, and 90 °, and the friction welding process was performed. went. In the butt J of the lidded container 1 after the friction welding process, a region including the center line C1 and a region including the center line C2 were sampled and subjected to a tensile test. A test piece in a region including the center line C1 is referred to as a first test piece X, and a test piece in a region including the center line C2 is referred to as a second test piece Y.

FIG. 17B is a graph showing the relationship between the friction angle and the tensile strength in Example 1. When the friction angle α is 0 °, the strength of the second test piece Y is about 75 N / mm ² , whereas the strength of the first test piece X is about 0 N / mm ² . When the friction angle α is set to 0 °, that is, when the friction angle α is parallel to the extending direction of the short side of the butted portion J, it has been found that the tensile strength varies greatly depending on the position of the butted portion J of the lidded container 1. . Further, it was found that the tensile strength of the first test piece X gradually increased as the friction angle α increased, whereas the tensile strength of the second test piece Y gradually decreased as the friction angle α increased. .

Further, from the graph of FIG. 17B, when the friction angle α is set to about 72 °, which is close to the diagonal line of the abutting portion J, the tensile strengths of the first test piece X and the second test piece Y are most approximated, and the friction It was found that when the angle α is set to 72 ° or more, the tensile strength of the first test piece X exceeds the tensile strength of the second test piece Y. Further, it was found that when the friction angle α is set within a range of 72 ° ± 20 °, the unbalance in the degree of tension between the first test piece X and the second test piece Y is substantially reduced.

[Example 2]
In Example 2, as shown in FIG. 18 (a), a test was performed on a lidded container 1A that is square in plan view. The material used is the same as in Example 1. The aspect ratio (aspect ratio) of the abutting portion J1 is 1: 1.

In Example 2, five test specimens were prepared, and friction angles α (angles from the center line C1 to the reference line C3) were set to 0 °, 15 °, 45 °, 75 °, and 90 °, respectively. A pressure welding process was performed. In the butt portion J1 of the lidded container 1A after performing the friction welding process, a region including the center line C1 and a region including the center line C2 were sampled and subjected to a tensile test. A test piece in a region including the center line C1 is referred to as a first test piece X, and a test piece in a region including the center line C2 is referred to as a second test piece Y.

FIG. 18B is a graph showing the relationship between the friction angle and the tensile strength in Example 2. When the friction angle α was 0 °, the strength of the second test piece Y was about 80 N / mm ² , whereas the strength of the first test piece X was about 0 N / mm ² . On the other hand, when the friction angle α is 90 °, the strength of the first test piece X is about 78 N / mm ² , whereas the strength of the second test piece Y is about 0 N / mm ² . That is, when the friction angle α is set to 0 ° or 90 °, that is, when the reference line C3 is parallel to the extending direction of one side of the butted portion J1, the tensile strength depends on the position of the butted portion J1 of the lidded container 1A. Were found to be very different. Further, it was found that the tensile strength of the first test piece X gradually increased as the friction angle α increased, whereas the tensile strength of the second test piece Y gradually decreased as the friction angle α increased. .

Further, from the graph of FIG. 18 (b), it is found that the tensile strengths of the first test piece X and the second test piece Y are most approximate when the friction angle α is set to 45 ° overlapping the diagonal line of the abutting portion J1. It was. In addition, it was found that when the friction angle α is set within a range of 45 ° ± 30 °, the imbalance between the tensile strengths of the first test piece X and the second test piece Y is generally small.

FIG. 19 is a cross-sectional view of a butt portion under each condition of Example 2. As shown in FIG. 19, when the friction angle is 0 ° in Example 2, the first test piece X (part where the friction direction and the extension direction of the side wall portion 12 are orthogonal) and the second test piece Y (friction direction) It was found that the joining state differs depending on the portion where the extending direction of the side wall portion 12 is parallel. This is considered to be because when the friction angle is 0 °, the frictional heat generated in the second test piece Y is larger than that in the first test piece X. On the other hand, when the friction angle was 45 degrees, it was found that the first test piece X and the second test piece Y were in substantially the same joined state.

[Example 3]
In Example 3, the lidded container 1B according to the third embodiment shown in FIGS. 12 and 13 and the lidded container 1C according to the fourth embodiment shown in FIG. The rate was measured.

In Example 3, as shown in FIG. 20, six types of test specimens having different conditions (test specimens A to F) were prepared. As shown in FIGS. 12 and 13, in the test bodies A to C, the planar shapes of the main body 2 and the lid 3 are rectangular in plan view. On the other hand, in the test bodies D to F, as shown in FIG. 14, the planar shapes of the main body 2 and the lid 3 are square in plan view. The wall thickness T1 was set to 1.5 mm for all of the test bodies A to F.

Specimens A and D have a curvature radius R of the chamfered portion 31 set to 0.1 mm (thread chamfering). The ratio of the curvature radius R to the wall thickness T1 of the test bodies A and D is 7%.

Specimens B and E have the curvature radius R of the chamfered portion 31 set to 3.0 mm. The ratio of the curvature radius R to the wall thickness T1 of the test bodies B and E is 200%.

Specimens C and F set the curvature radius R of the chamfered portion 31 to 5.0 mm. The ratio of the curvature radius R to the wall thickness T1 of the test bodies C and F is 333%.

In the test bodies A to F of Example 3, the main body 2 was formed of aluminum alloy A6063-T5 (JIS). JIS: A6063 is Si; 0.20 to 0.60%, Fe; 0.35% or less, Cu; 0.10% or less, Mn; 0.10% or less, Mg; 0.45 to 0.90% Cr: 0.10% or less, Zn: 0.10% or less, Ti: 0.10% or less, Al: balance. T5 is artificially aged after cooling from high temperature processing in heat treatment.

Further, in the test bodies A to F of Example 3, the lid 3 was formed of aluminum A1050-H112 (JIS). JIS: A1050 is Si: 0.25% or less, Fe: 0.40% or less, Cu: 0.05% or less, Mn: 0.05% or less, Mg: 0.05% or less, Zn: 0.05 % Or less, V; 0.05% or less, Ti; 0.03% or less, Al; 99.50% or more. H112 is a product in which mechanical properties are guaranteed as it is produced without aggressive work hardening.

As shown in FIG. 17A, the friction angle in the friction stir process of the test bodies A to C is set to 0 ° on the center line C1 parallel to the short side of the abutting portion J2, and the reference line for the friction angle is 0. Friction welding was performed at each friction angle set to °, 15 °, 45 °, 75 °, and 90 °.

In the friction welding process of the test bodies D to F, as shown in FIG. 18A, the center line C1 parallel to one side of the abutting portion J2 is set to 0 °, and the reference lines of the friction angle are set to 0 ° and 15 °. , 45 ° and 90 °, and friction welding was performed at each friction angle.

The pressure drop rate means the pressure reduction rate from the stage where air is supplied from a hole drilled in a part of the manufactured lidded container and the air is shut off. In this example, a hole was made in a part of the lidded container, air was supplied from the hole at 500 kPa, and the time from when the supply of air was interrupted until the internal pressure of the lidded container reached 100 kPa was measured. The measurement time was up to 60 seconds, and when the internal pressure did not reach 100 kPa even after exceeding 60 seconds, the internal pressure when 60 seconds elapsed was measured.

The pressure drop rate (kPa / sec) is expressed by the following formula 1.
Pressure drop rate = (P ₀ −P _min ) / t (Formula 1)
P ₀ : Initial pressure (500 kPa)
P _min : Minimum pressure t: Time from pressure supply shut-off until reaching the minimum pressure In short, the lower the pressure drop rate, the higher the water tightness and air tightness.

As shown in FIG. 21 (a), in the specimens A to C, when the friction angle is set to 0 °, the pressure drop rate of the lidded container 1B is the highest, and the pressure drop rate decreases as the friction angle is increased. When the friction angle is 45 °, the pressure drop rate is the lowest. Moreover, the pressure drop rate increases as the friction angle is set to be greater than 45 °. That is, it was found that the water tightness and the air tightness become higher as the friction angle approaches 45 °. Therefore, it is preferable to set the friction angle (angle formed between one side of the abutting portion J2 and the reference line) to 35 ° to 55 °, more preferably to 40 ° to 50 °, and to 45 °. Is most preferred.

As shown in FIG. 21 (b), also in the test bodies D to F, as the friction angle approaches 45 °, the watertightness and airtightness of the lidded container 1C increase, and when the friction angle is set to 45 °, It was found that water tightness and air tightness were the highest. Therefore, it is preferable to set the friction angle (angle formed between one side of the abutting portion J2 and the reference line) to 35 ° to 55 °, more preferably to 40 ° to 50 °, and to 45 °. Is most preferred.

Further, from the results of FIGS. 21A and 21B, when the friction angle is set to 45 ° regardless of the planar shape (aspect ratio of the rectangular shape in plan view) of the main body 2 and the lid 3, the container with a lid It can be seen that the pressure drop rates of 1B and 1C are the lowest, that is, the water tightness and the air tightness are the highest. This is considered to be because, by setting the friction angle to 45 °, the balance of the adhesion degree at each part of the abutting portion J2 in the friction welding process is improved. Moreover, it turned out that the magnitude | size of the curvature radius R of the chamfer 31 does not affect the pressure drop rate.

Based on the above results, the relationship between joint strength and friction angle, and the relationship between water tightness and airtightness and friction angle will be discussed. In the following discussion, the lidded container 1B shown in FIG. 12 (hereinafter referred to as “rectangular container”) and the lidded container 1C illustrated in FIG. 14 (hereinafter referred to as “square container”) are illustrated. The container dimensions and the friction welding conditions are based on the conditions shown in FIG.

<Relationship between bonding strength and friction angle>
As shown in FIG. 23 (a), in the rectangular container, when the reference line C3 is set to be parallel to the diagonal line of the rectangular section in plan view and friction welding is performed along the reference line C3, The area of the intermittent friction part in becomes equal. According to such a joining method, the frictional heat generated at each joining portion becomes uniform, so that it is considered that the imbalance in joining strength is solved. Here, as shown in FIG. 23 (b), the intermittent friction portion is a portion that is intermittently exposed to the atmosphere during friction welding among the abutting portions of the members, and the area of the intermittent friction portion. As the value increases, the frictional heat tends to decrease and the bonding strength decreases. In FIG. 23 (b), the hatched portion is the intermittent friction portion.

FIG. 24A shows the result of calculating the relationship between the area of the intermittent friction part and the friction angle when the main body part of the rectangular container (the aspect ratio of the long side and the short side is 3: 1) and the lid are friction-welded. Indicates. As is apparent from this result, the area S1 of the intermittent friction part on the long side (area of the intermittent friction part in a region parallel to the long side) and the short side at the friction angle corresponding to the diagonal line of the rectangular shape in plan view Is equal to the area S2 of the intermittent friction portion (the area of the intermittent friction portion which is parallel to the short side). That is, at the friction angle corresponding to the diagonal line of the rectangular shape in plan view, the frictional heat generated at each joint site becomes uniform, so that it is considered that the imbalance in the joint strength is eliminated.

Further, as shown in FIG. 24B, even in the case of a square container, similarly to the rectangular container, at the friction angle corresponding to the diagonal line of the rectangular shape in plan view, the area of the intermittent friction portion on one side and the one side The area of the intermittent friction part in the other vertical side becomes equal.

<Relationship between water tightness and air tightness and friction angle>
As shown in FIG. 25, when the reference line C3 is set so as to be parallel to the diagonal line of the rectangular section in plan view, and the friction welding is performed along the reference line C3, the abrasion powder moving distance at each joint portion is uneven. Therefore, it is considered that water tightness and air tightness are lowered. That is, the wear powder movement distance L1 in the part a shown in FIG. 25 is different from the wear powder movement distance L2 in the part b. Here, the abrasion powder moving distance is the maximum distance at which the abrasion powder (metal scrap) can move at the interface between the main body 2 and the lid 3 during friction welding at a certain friction angle and wall thickness. . For example, referring to (b) of FIG. 32, since the friction direction is set parallel to the long side of the side wall portion 104 (friction angle = 90 °), the wear powder movement distance L3 in the c portion is equal to that of the side wall portion 104. The dimension is equivalent to the wall thickness, and the abrasion powder movement distance L4 in the part d is equivalent to the long side of the side wall part 104. When the abrasion powder moving distance becomes long, the abrasion powder (metal scrap) tends to remain on the joint surface, and the sealing performance of the joint surface decreases.

FIG. 26 (a) shows the result of calculating the relationship between the abrasion powder moving distance and the friction angle when the main body of the rectangular container (the aspect ratio between the long side and the short side is 3: 1) and the lid are friction-welded. Show. As is clear from this result, regardless of the aspect ratio of the rectangular shape in plan view, the wear powder movement distance on the long side and the wear powder movement distance on the short side are equal at a friction angle of 45 °. That is, at the friction angle of 45 °, the dischargeability of the wear powder (metal scrap) at each joint portion becomes uniform, so it is considered that the imbalance in the adhesion degree of the joint surface is eliminated.

Further, as shown in FIG. 26B, even in the case of a square container, naturally, at a friction angle of 45 °, the wear powder movement distance on one side and the wear powder movement distance on the other side perpendicular to the one side are Will be equal.

As described above, according to the present invention, it is possible to reduce the strength imbalance in each joint portion of the lidded container, and to improve the watertightness and airtightness of the lidded container. Can be provided.

Example 4
Next, a fourth embodiment of the present invention will be described. In Example 4, six test bodies (test bodies G, H, I, K, L, M) for each of the first metal member 102 and the second metal member 103 were prepared, and the size, material, The joining method described above was performed for each test specimen while changing the welding conditions and the like. Moreover, the pressure drop rate before and after performing a welding process about each test body was measured and compared. In addition, the test body M performed only the welding process without performing the friction welding process, and measured the pressure drop rate.

The test bodies G and H joined short metal members (first metal member 102 and second metal member 103) as shown in FIG. As shown in FIG. 28, the test bodies K to M were obtained by joining metal members (first metal member 102, second metal member 103) longer than the test bodies G and H. The unit of the dimension line is mm.

As shown in FIG. 31, the material of the first metal member 102 of the specimen G is JIS: A6063. The material of the first metal member 102 of the test bodies H to M is JIS: A1050.

The material of the second metal member 103 of the test bodies G to M is JIS: ADC12 (Cu; 1.5 to 3.5%, Si; 9.6 to 12.0%, Mg; 0.3% or less, Zn 1.0% or less, Fe; 1.3% or less, Mn; 0.5% or less, Ni; 0.5% or less, Ti; 0.3% or less, Pb; 0.2% or less, Sn; 0 2% or less, Al; balance).

In the friction process related to the friction welding process of the test body I and the test body K, the test body K was subjected to a test with a larger friction load and a longer friction time than the test body I.

In the welding process related to the test bodies G and H, welding was performed using the low-power YAG laser welding apparatus under the conditions of FIG. In the welding process related to the test bodies I and K, welding was performed using the fiber laser welding apparatus under the conditions of FIG. In the welding process according to the test bodies L and M, welding was performed using the high-power YAG laser welding apparatus under the conditions shown in FIG.

30 (a) is a schematic cross-sectional view of a healthy part after the friction welding process of the test body G. FIG. On the other hand, FIG. 30B is a schematic cross-sectional view of a portion including a bonding defect after the friction welding process of the test body G. In both (a) and (b) of FIG. 30, burrs P are generated on the inner side surface and the outer side surface of the side wall portion 112. In FIG. 30A, the abutting portion J is cleanly joined, but in FIG. 30B, it can be seen that a joining defect V occurs in the abutting portion J. In the test body G, since the second metal member 103 is harder than the first metal member 102, it is considered that the burrs P are generated only from the first metal member 102.

30 (c) is a schematic cross-sectional view after the welding process of the specimen G. FIG. In FIG. 30C, the weld metal Q formed by the welding process covers the outer surfaces 112a and 122a in the vicinity of the abutting portion J. Moreover, the burr | flash P of the outer side of the side wall part 112 has disappeared. Further, the bonding defect V is also repaired.

As shown in FIG. 31, it was confirmed that the pressure drop rate after the welding process was considerably lower than that before the welding process was performed for both of the test bodies G to L. That is, the watertightness and airtightness of the hollow container can be greatly improved by performing the welding process in addition to the friction welding process. Further, when the pressure drop rates of the test body M and other test bodies are compared, the water tightness and the air tightness can be improved by performing the friction welding process and the welding process rather than performing only the welding process.

DESCRIPTION OF SYMBOLS 1 Container with lid | cover 1A Container with lid | cover 2 Main body part 3 Lid part 4 Box-shaped member 5 Opening 6 Fin 11 Bottom part 12 Side wall part 15 Upper surface (side wall part) 16 Body inner peripheral surface 17 Main body recessed groove part 18 Main body outer peripheral surface 23 (Lid Lower surface 24 lid center surface 25 lid inner groove portion 26 lid inner circumferential surface 27 lid outer groove portion 28 lid outer circumferential surface 101 hollow container 102 first metal member 103 second metal member 111 bottom portion 112 side wall portion 112a outer surface 121 bottom portion 122 Side wall part 122a Outer surface J Butt part P Burr Q Weld metal T Wall thickness

Claims (13)

1. A preparation step of preparing a main body portion including a bottom portion and a side wall portion having a rectangular frame shape standing in plan view on the bottom portion, and a lid portion that closes the opening of the main body portion;
   The main body portion and the lid portion along a reference line that is inclined with respect to one side of the abutting portion when the abutting portion is formed by abutting the upper surface of the side wall portion and the lower surface of the lid portion in plan view. And a friction welding process for friction welding by reciprocally moving them relatively and linearly.
2. The said reference line is set in the range of +/- 30 degrees with respect to the diagonal of the said abutting part, when the said abutting part exhibits square shape in the said friction welding process, The range of Claim 1 characterized by the above-mentioned. Manufacturing method of container with lid.
3. The said reference line is set in the range of +/- 20 degrees with respect to the diagonal of the said abutting part, when the said abutting part exhibits rectangular shape in the said friction welding process, The range of Claim 1 characterized by the above-mentioned. Manufacturing method of container with lid.
4. The method for manufacturing a container with a lid according to claim 1, wherein, in the friction welding step, the reference line is set to be parallel to a diagonal line of the abutting portion.
5. The method for manufacturing a lidded container according to claim 1, wherein, in the friction welding step, an angle formed between one side of the abutting portion and the reference line is set to 35 ° to 55 °.
6. The method for manufacturing a lidded container according to claim 1, wherein, in the friction welding step, an angle formed between one side of the abutting portion and the reference line is set to 40 ° to 50 °.
7. The method for manufacturing a container with a lid according to claim 1, wherein, in the friction welding step, an angle formed between one side of the abutting portion and the reference line is set to 45 °.
8. On the upper surface of the side wall,
   A main body concave groove formed in a rectangular frame shape in plan view;
   A main body inner peripheral surface formed inside the main body concave groove,
   The outer peripheral surface of the main body formed at a position lower than the inner peripheral surface of the main body is formed outside the main body concave groove portion,
   The method for manufacturing a container with a lid according to claim 1, wherein, in the friction welding step, the inner peripheral surface of the main body and the lower surface of the lid portion are brought into contact with each other.
9. On the lower surface of the lid,
   A lid groove formed in a rectangular frame shape in plan view;
   A lid inner peripheral surface formed inside the lid concave groove,
   A lid outer peripheral surface formed at a position higher than the inner peripheral surface of the lid is formed on the outer side of the concave groove portion of the lid,
   2. The method for manufacturing a lidded container according to claim 1, wherein in the friction welding step, the upper surface of the side wall portion and the inner peripheral surface of the lid are brought into contact with each other.
10. A friction welding process of friction welding the first metal member and the second metal member;
    And a welding step of welding the outer surfaces with a burr generated on at least one outer surface of the first metal member and the second metal member as a filler material.
11. The bonding method according to claim 10, wherein a recess is formed in at least one of the opposing surfaces of the first metal member and the second metal member.
12. The joining method according to claim 10, wherein laser welding is performed in the welding step.
13. The joining method according to claim 10, wherein the first metal member and the second metal member are made of aluminum or an aluminum alloy.

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