JP2018069322A - Manufacturing method of hollow container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a hollow container which can reduce thermal strain.SOLUTION: A manufacturing method includes: a preparation process of preparing a first metal member 2 having a bottom part 10 and a peripheral wall part 11, and a second metal member 3 having a bottom part 20 and a peripheral wall part 21; a butting process of forming a butting part J1 by butting an end surface of the peripheral part 11 of the first metal member 2 and an end surface of the peripheral wall part 21 of the second metal member 3; a temporary welding process of conducting spot-temporary soldering by friction stir on the butting part J1 in a state that only a stir pin F2 of a rotary tool F having the stir pin F2 is in contact with the first metal member 2 and the second metal member 3; and a final welding process of friction-stirring by rotating the rotary tool F around on the butting part J1 in a state that only the stir pin F2 of the rotary tool F is in contact with the first metal member 2 and the second metal member 3.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for manufacturing a hollow container.

  Patent Document 1 discloses a method for manufacturing a hollow container. The method for manufacturing the hollow container includes a welding process in which laser welding is performed along a butt portion between the hollow container body and the sealing body after the sealing body is disposed in the opening of the hollow container body, and the welding process is performed. And a friction stir process in which friction stir welding is performed using a rotary tool.

JP 2014-102895 A

  In the conventional method for manufacturing a hollow container, since laser welding is performed over the entire circumference of the butt portion, there is a problem in that the amount of heat input increases and thermal distortion occurs in the hollow container body and the sealed body.

  Then, this invention makes it a subject to provide the manufacturing method of the hollow container which can make a thermal strain small.

In order to solve such a problem, the present invention provides a first metal member including a bottom portion and a peripheral wall portion rising from the periphery of the bottom portion, and a second metal member including a bottom portion and a peripheral wall portion rising from the periphery of the bottom portion. A preparatory step comprising: a preparatory step comprising: a preparatory step, a butting step of butting the end surface of the peripheral wall portion of the first metal member and the end surface of the peripheral wall portion of the second metal member to form a butting portion; A temporary joining step of performing spot tacking by frictional stirring on the butt portion in a state where only the stirring pin of the rotary tool is in contact with the first metal member and the second metal member, and a book provided with the stirring pin A main joining step in which only the agitating pin of the joining rotary tool is brought into contact with the first metal member and the second metal member, and the main joining rotary tool is caused to make a round with respect to the abutting portion and frictionally stirred. Characterized in that it comprises a.
In addition, the present invention provides a preparation step of preparing a first metal member including a bottom portion and a peripheral wall portion rising from a peripheral edge of the bottom portion, and a flat plate-like second metal member, and an end surface of the peripheral wall portion of the first metal member And a back surface of the second metal member, a butting step of abutting to form a butting portion, and only the stirring pin of the rotary tool for temporary joining provided with a stirring pin is the first metal member and the second metal member Temporary joining step of performing spot tacking by friction stir to the butting portion in the contacted state, and only the stirring pin of the main rotating tool for joining provided with the stirring pin is the first metal member and the second metal member. And a main joining step in which the main joining rotary tool is caused to make a round with respect to the abutting portion while being in contact with the abutting portion.
Further, the present invention provides a first metal member comprising a bottom part and a peripheral wall part rising from the peripheral edge of the bottom part, and a preparation process for preparing a second metal member comprising a bottom part and a peripheral wall part rising from the peripheral edge of the bottom part, A butting step of butting the end surface of the peripheral wall portion of the first metal member and the end surface of the peripheral wall portion of the second metal member to form a butting portion; and MIG welding, TIG welding or laser to the butting portion Temporary joining step for spot tacking by welding, and only the stirring pin of the rotating tool for main joining provided with the stirring pin with the first metal member and the second metal member in contact with the butt portion And a main joining step in which the rotary tool for main joining is caused to make a round and friction stir.
In addition, the present invention provides a preparation step of preparing a first metal member including a bottom portion and a peripheral wall portion rising from a peripheral edge of the bottom portion, and a flat plate-like second metal member, and the peripheral wall portion of the first metal member. A butting process in which the end face and the back surface of the second metal member are butted together to form a butting part; a temporary joining process in which spot welding is performed on the butting part by MIG welding, TIG welding, or laser welding; and a stirring pin A book that frictionally stirs by rotating the main welding rotary tool around the butting portion in a state where only the stirring pin of the main welding rotating tool including the first metal member and the second metal member is in contact with each other. And a joining step.

  According to this manufacturing method, since the temporary joining step is performed by spot tacking, the heat input can be reduced. Moreover, since the friction stir welding is performed using only the stirring pin in the main joining step, the amount of heat input can be reduced. Thereby, thermal distortion can be reduced synergistically. Moreover, since the temporary bonding process is performed by spot tacking, the temporary bonding process can be performed in a short time. Moreover, in this joining process, friction stir welding can be performed to a deep position in a state where a large load is not applied to the friction stirrer.

  Moreover, it is preferable that the temporary welding rotary tool and the main welding rotary tool are the same. Thereby, since it is not necessary to exchange a rotary tool by a temporary joining process and a main joining process, working time can be shortened more.

  Moreover, it is preferable to round-chamfer each corner which the said 1st metal member and the said 2nd metal member oppose. Thereby, a corner | angular part can be joined easily in the case of this joining process.

  According to the method for manufacturing a hollow container according to the present invention, thermal strain can be reduced.

It is a perspective view which shows the preparation process of the manufacturing method of the hollow container which concerns on 1st embodiment of this invention. It is sectional drawing which shows the butt | matching process of the manufacturing method of the hollow container which concerns on 1st embodiment. It is a perspective view which shows the temporary joining process of the manufacturing method of the hollow container which concerns on 1st embodiment. It is sectional drawing which shows the temporary joining process of the manufacturing method of the hollow container which concerns on 1st embodiment. It is a perspective view which shows the main joining process of the manufacturing method of the hollow container which concerns on 1st embodiment. It is sectional drawing which shows the main joining process of the manufacturing method of the hollow container which concerns on 1st embodiment. It is a perspective view which shows the preparation process of the manufacturing method of the hollow container which concerns on 2nd embodiment of this invention. It is a perspective view which shows the temporary joining process of the manufacturing method of the hollow container which concerns on 2nd embodiment. It is a perspective view which shows the main joining process of the manufacturing method of the hollow container which concerns on 2nd embodiment.

[First embodiment]
The manufacturing method of the hollow container which concerns on 1st embodiment of this invention is demonstrated in detail with reference to drawings. In the method for manufacturing a hollow container according to the present embodiment, as shown in FIG. 1, a metal hollow container 1 having a hollow portion is formed. In the method for manufacturing a hollow container, a preparation process, a butting process, a temporary bonding process, and a main bonding process are performed.

  The preparation step is a step of preparing a first metal member 2 and a second metal member 3 as shown in FIG. The first metal member 2 is a box-shaped body. The first metal member 2 includes a rectangular plate-shaped bottom portion 10 and a rectangular frame-shaped peripheral wall portion 11 that rises from the periphery of the bottom portion 10. The four corners of the peripheral wall portion 11 are round chamfered in the height direction. A recess 12 is formed inside the first metal member 2.

  The second metal member 3 includes a rectangular plate-shaped bottom portion 20 and a rectangular frame-shaped peripheral wall portion 21 that rises from the periphery of the bottom portion 20. The four corners of the peripheral wall 21 are rounded over the height direction. A recess 22 is formed in the second metal member 3. Although the magnitude | size and shape of the 1st metal member 2 and the 2nd metal member 3 may differ, in this embodiment, it is the same.

  The first metal member 2 and the second metal member 3 are made of a metal capable of friction stirring such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy. The first metal member 2 and the second metal member 3 may be made of different materials, but are the same material in the present embodiment.

  The butting process is a process of butting the first metal member 2 and the second metal member 3 as shown in FIG. In the butting step, the end surface 11a of the peripheral wall portion 11 and the end surface 21a of the peripheral wall portion 21 are butted to form a butting portion J1. By the butting process, the side surface 11b of the peripheral wall portion 11 and the side surface 21b of the peripheral wall portion 21 are flush with each other.

  The temporary joining step is a step of temporarily joining the first metal member 2 and the second metal member 3 by friction stirring. In the temporary bonding step, temporary bonding is performed using the rotary tool F (temporary bonding rotating tool). As shown in FIG. 3, the rotating tool F includes a connecting portion F1 and a stirring pin F2. The rotary tool F is made of, for example, tool steel. The connection part F1 is a part which exhibits a columnar shape and is connected to the rotating shaft of the friction stirrer.

  The stirring pin F2 hangs down from the connecting portion F1 and is coaxial with the connecting portion F1. The stirring pin F2 is tapered as it is separated from the connecting portion F1. A spiral groove is formed on the outer peripheral surface of the stirring pin F2. In the present embodiment, in order to rotate the rotary tool F to the right, the spiral groove is formed in a counterclockwise direction from the proximal end toward the distal end.

  In addition, when rotating the rotation tool F counterclockwise, it is preferable to form the spiral groove clockwise as it goes from the proximal end to the distal end. By setting the spiral groove in this way, the metal plastically fluidized during friction stirring is guided to the tip side of the stirring pin F2 by the spiral groove. Thereby, the quantity of the metal which overflows outside the to-be-joined metal member (the 1st metal member 2 and the 2nd metal member 3) can be decreased. The rotary tool F is attached to, for example, an arm robot having a rotation driving means such as a spindle unit at the tip. Thereby, the angle and insertion position of the rotation center axis of the rotary tool F can be easily changed.

  As shown in FIG. 3 and FIG. 4, in the temporary joining step, spot tacking is performed by friction stir using a rotary tool F (rotary tool for temporary joining). In the temporary joining step, only the stirring pin F2 of the rotating tool F rotated to the right is inserted into the abutting portion J1 in the shallow direction while setting the side surfaces 11b and 21b to be perpendicular to the rotation center axis of the rotating tool F. Then, the spot temporary joining step is performed in a dotted manner along the butt portion J1. Plasticizing regions W1 are formed at predetermined intervals by the temporary joining process.

  As shown in FIGS. 5 and 6, the main joining step is a step of performing the friction stir welding of the butt joint J <b> 1 in earnest. Different rotary tools may be used for the temporary bonding step and the main bonding step, but in the present embodiment, the rotating tool F (the main bonding rotating tool) is used as in the temporary bonding step. In the main joining step, the rotating tool F is relatively moved along the abutting portion J1 with only the stirring pin F2 of the rotating tool F rotating rightward in contact with the first metal member 2 and the second metal member 3. In the main joining step, the stirring pin F2 is inserted to a predetermined depth while setting the side surfaces 11b, 21b and the rotation center axis of the rotary tool F to be perpendicular.

  A plasticizing region W2 is formed in the movement locus of the rotary tool F. In the main joining step, the rotary tool F is relatively moved around the metal member to be joined so that the start end and the end end of the plasticizing region W2 overlap. When the main joining process is completed, a burr removing process for removing burrs formed around the plasticized region W2 may be performed. Thereby, the hollow container 1 can be finished finely.

  According to the method for manufacturing a hollow container according to the present embodiment described above, the temporary joining step is performed by spot tacking, so that the amount of heat input can be reduced. In addition, since the friction stir welding is performed using only the stirring pin F2 in the main joining process, the heat input can be reduced. Thereby, the thermal distortion of the 1st metal member 2 and the 2nd metal member 3 can be made synergistically small. Moreover, since the temporary bonding process is performed by spot tacking, the temporary bonding process can be performed in a short time. Further, in the main joining step, the friction stir welding can be performed up to the deep position of the butt joint J1 without applying a large load to the friction stirrer.

  In addition, when the same rotary tool is used in the temporary joining process and the main joining process as in the present embodiment, it is not necessary to replace the rotating tool for each process, so that the working time can be further shortened.

  Moreover, although the corner | angular part of the 1st metal member 2 and the 2nd metal member 3 does not need to give a chamfering process, in this embodiment, the chamfering process is performed. Thereby, since the rotation tool F can be smoothly moved relatively at the corners of the first metal member 2 and the second metal member 3, friction stir welding can be easily performed.

  In the temporary joining step, spot tacking may be performed by welding instead of friction stirring. The welding may be TIG welding, MIG welding, or laser welding.

[Second Embodiment]
Next, the manufacturing method of the hollow container which concerns on 2nd embodiment of this invention is demonstrated. In the method for manufacturing a hollow container according to the second embodiment, a preparation process, a butting process, a temporary joining process, and a main joining process are performed. As shown in FIG. 7, the manufacturing method of the hollow container according to the second embodiment is different from the first embodiment in the second metal member 4 and the temporary joining step. In the second embodiment, the description will focus on the parts that are different from the first embodiment.

  The preparation step is a step of preparing the first metal member 2 and the second metal member 4 as shown in FIG. The second metal member 4 is a plate-like metal member that seals the opening of the first metal member 2. The second metal member 4 is formed of the same material as the first metal member 2. Further, the corner portion of the second metal member 4 is rounded.

  As shown in FIG. 7, the butting process is a process in which the end surface 11 a of the first metal member 2 and the back surface 4 b of the second metal member 4 are butted to form a butting portion J <b> 2 (see FIG. 8). Further, in the butting process, the side surface 11b of the first metal member 2 and the side surface 4c of the second metal member 3 are flush with each other.

  The temporary joining step is a step of temporarily joining the first metal member 2 and the second metal member 4 by welding as shown in FIG. In the temporary joining step, spot tacking is performed by laser welding using a welding torch H. In the temporary joining step, the welding torch H is brought close to the abutting portion J2, and the spot temporary joining step is performed in a spot shape along the abutting portion J2. Weld marks W3 are formed at predetermined intervals by the temporary joining process. In addition, although it does not restrict | limit in particular about the kind of welding, Laser welding, TIG welding, or MIG welding can be performed.

  As shown in FIG. 9, the main joining step performs friction stir welding on the butt joint J <b> 2 in the same manner as in the first embodiment. In other words, in the main joining step, only the stirring pin F2 of the rotary tool F is moved relative to the first metal member 2 and the second metal member 4 along the abutting portion J2. As described above, the hollow container manufacturing method according to the second embodiment can achieve substantially the same effect as the first embodiment.

  Moreover, in the temporary joining process of the manufacturing method of the hollow container which concerns on 2nd embodiment, although temporary joining was performed by welding, you may perform spot tacking by friction stirring like 1st embodiment.

  Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Hollow container 2 1st metal member 3 2nd metal member 4 2nd metal member F Rotating tool (Rotating tool for main joining, Rotating tool for temporary joining)
F2 Stirring pin J1 Butting part J2 Butting part W1 Plasticizing area W2 Plasticizing area

Claims (7)

Preparing a first metal member comprising a bottom and a peripheral wall rising from the periphery of the bottom; and a second metal member comprising a bottom and a peripheral wall rising from the periphery of the bottom;
A butting step of butting the end surface of the peripheral wall portion of the first metal member and the end surface of the peripheral wall portion of the second metal member to form a butting portion;
A temporary joining step of performing spot tacking by frictional stirring on the butt portion in a state where only the stirring pin of the rotary tool for temporary joining provided with the stirring pin is in contact with the first metal member and the second metal member; ,
Friction stirring by rotating the main welding rotary tool around the abutting portion in a state where only the stirring pin of the main welding rotary tool including the stirring pin is in contact with the first metal member and the second metal member. A manufacturing method of a hollow container, comprising: a main joining step. A preparation step of preparing a first metal member comprising a bottom portion and a peripheral wall portion rising from a peripheral edge of the bottom portion; and a flat plate-like second metal member;
A butting step of butting the end surface of the peripheral wall portion of the first metal member and the back surface of the second metal member to form a butting portion;
A temporary joining step of performing spot tacking by frictional stirring on the butt portion in a state where only the stirring pin of the rotary tool for temporary joining provided with the stirring pin is in contact with the first metal member and the second metal member; ,
Friction stirring by rotating the main welding rotary tool around the abutting portion in a state where only the stirring pin of the main welding rotary tool including the stirring pin is in contact with the first metal member and the second metal member. A manufacturing method of a hollow container, comprising: a main joining step.   The method for manufacturing a hollow container according to claim 1, wherein the rotary tool for temporary joining and the rotary tool for main joining are the same.   The method for producing a hollow container according to any one of claims 1 to 3, wherein each of the opposing corners of the first metal member and the second metal member is rounded. Preparing a first metal member comprising a bottom and a peripheral wall rising from the periphery of the bottom; and a second metal member comprising a bottom and a peripheral wall rising from the periphery of the bottom;
A butting step of butting the end surface of the peripheral wall portion of the first metal member and the end surface of the peripheral wall portion of the second metal member to form a butting portion;
A temporary joining step of performing spot tacking by MIG welding, TIG welding or laser welding on the butt portion;
Friction stirring by rotating the main welding rotary tool around the abutting portion in a state where only the stirring pin of the main welding rotary tool including the stirring pin is in contact with the first metal member and the second metal member. A manufacturing method of a hollow container, comprising: a main joining step. A preparation step of preparing a first metal member comprising a bottom portion and a peripheral wall portion rising from a peripheral edge of the bottom portion; and a flat plate-like second metal member;
A butting step of butting the end surface of the peripheral wall portion of the first metal member and the back surface of the second metal member to form a butting portion;
A temporary joining step of performing spot tacking by MIG welding, TIG welding or laser welding on the butt portion;
Friction stirring by rotating the main welding rotary tool around the abutting portion in a state where only the stirring pin of the main welding rotary tool including the stirring pin is in contact with the first metal member and the second metal member. A manufacturing method of a hollow container, comprising: a main joining step.   The method for producing a hollow container according to claim 5 or 6, wherein round chamfering is performed on each of the opposing corners of the first metal member and the second metal member.

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