JP2018065164A - Method of manufacturing hollow vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a hollow vessel capable of reducing thermal strain.SOLUTION: The present invention provides a method of manufacturing a hollow vessel constituted of a hollow vessel main body 2 having a bottom part 10 and a peripheral wall part 11, and a sealing body 3 for sealing an opening of the hollow vessel main body 2, the hollow vessel main body 2 being joined with the sealing body 3. The method includes a preparation process of forming a stepped part on the inner peripheral edge of the peripheral wall part 11, an arrangement process of forming a butting part J1 by arranging the sealing body 3 in the hollow vessel main body 2, a temporary joining process of performing spot temporary attachment by frictional agitation in a state where only an agitation pin F2 is in contact with the hollow vessel main body 2 and the sealing body 3 by inserting the agitation pin F2 of a rotating rotary tool F into the butting part J1, and a regular joining process of performing frictional agitation joining by relatively moving along the butting part J1 in a state where only the agitation pin F2 is in contact with the hollow vessel main body 2 and the sealing body 3 by inserting the agitation pin F2 of the rotating rotary tool F into the butting part J1.SELECTED DRAWING: Figure 2

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 comprises a hollow container body having a bottom part and a peripheral wall part rising from a peripheral edge of the bottom part, and a sealing body for sealing an opening of the hollow container body, A method of manufacturing a hollow container for joining a hollow container body and the sealing body, the step of forming a stepped portion having a stepped bottom surface and a stepped side surface rising from the stepped bottom surface on the inner peripheral edge of the peripheral wall portion; The disposing step of disposing the sealing body on the hollow container body and abutting the side surface of the step with the side surface of the sealing body to form a butting portion, and stirring of the rotary tool for temporary bonding rotating to the butting portion A temporary joining step of performing spot tacking by frictional stirring in a state where only the stirring pin is in contact with the hollow container main body and the sealing body, and a rotating tool for main joining rotating to the butting portion. Insert a stirring pin And, characterized in that it comprises a and a main bonding step of performing friction stir welding are relatively moved along the butt portion only the stirring pin in a state where the hollow container body and is brought into contact with the sealing body.
Further, the present invention comprises a hollow container body having a bottom part and a peripheral wall part rising from a peripheral edge of the bottom part, and a sealing body for sealing an opening of the hollow container body, and the hollow container body and the sealing A method of manufacturing a hollow container for joining a body, comprising: a step of forming a stepped portion having a stepped bottom surface and a stepped side surface rising from the stepped bottom surface on an inner periphery of the peripheral wall portion; An arrangement step of arranging a sealing body and abutting the side surface of the step with the side surface of the sealing body to form a butted portion, a temporary joining step of performing spot tacking by welding along the butted portion, and the butting Insert the stirring pin of the rotating tool for main joining rotating into the part, and move the friction stir welding by relatively moving along the abutting part with only the stirring pin in contact with the hollow container body and the sealing body. Main joining process to be performed , Characterized in that it comprises a.

  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 rotary tool for temporary joining is the same as the rotary tool for main joining. 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 that the main joining rotary tool has a stirring pin longer than the thickness of the sealing body, and in the main joining step, the friction stir welding is performed over the entire length in the depth direction of the butt portion. . According to this manufacturing method, the watertightness and airtightness of the hollow container can be enhanced.

  Moreover, it is preferable to perform MIG welding, TIG welding, or laser welding in the said temporary 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 and arrangement | positioning process of the manufacturing method of the hollow container which concern on 1st 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 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 temporary joining process of the manufacturing method of the hollow container which concerns on 2nd embodiment of this invention.

[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 manufacturing method of a hollow container, a preparatory process, an arrangement | positioning process, a temporary joining process, and a main joining process are performed.

  The preparation step is a step of preparing a hollow container body 2 and a sealing body 3 as shown in FIG. The hollow container main body 2 is a box-shaped body opened upward. The hollow container body 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. A stepped portion 12 having a stepped bottom surface 12a and a stepped side surface 12b rising from the stepped bottom surface 12a is formed on the inner peripheral edge of the peripheral wall portion 11. A recess 13 is formed inside the hollow container body 2.

  The sealing body 3 is a rectangular plate member. The sealing body 3 is sized to be disposed on the stepped portion 12 with almost no gap. The plate | board thickness of the sealing body 3 is substantially equivalent to the height dimension of the level | step difference side surface 12b. The hollow container body 2 and the sealing body 3 are made of a metal capable of frictional stirring such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, magnesium alloy, and the like. The hollow container body 2 and the sealing body 3 may be made of different materials, but are the same material in the present embodiment.

  An arrangement | positioning process is a process of arrange | positioning the sealing body 3 to the level | step difference bottom face 12a. When the sealing body 3 is disposed on the step bottom surface 12a, the step side face 12b and the side face 3c of the sealing body 3 are abutted to form a butted portion J1 (see FIG. 2). Moreover, when the sealing body 3 is arrange | positioned at the level | step difference bottom face 12a, the end surface 11a of the surrounding wall part 11 and the surface 3a of the sealing body 3 will become flush | level.

  A temporary joining process is a process of temporarily joining the hollow container main body 2 and the sealing body 3 by friction stirring. In the temporary bonding step, temporary bonding is performed using the rotary tool F. As shown in FIG. 2, the rotary 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. The length of the stirring pin F <b> 2 is larger than the plate thickness of the sealing body 3. 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 to the exterior of a to-be-joined metal member (the hollow container main body 2 and the sealing body 3) can be decreased.

  As shown in FIGS. 2 and 3, in the temporary joining step, spot tacking is performed by friction stirring using a rotating tool F (temporary joining rotating tool). In the temporary joining step, only the stirring pin F2 of the rotating tool F rotated to the right is inserted into the butt portion J1 shallowly, and the spot tentative joining step is performed in a spot shape along the butt portion J1. Plasticizing regions W1 are formed at predetermined intervals by the temporary joining process.

  As shown in FIGS. 4 and 5, the main joining step is a step of performing 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 hollow container body 2 and the sealing body 3. By setting the insertion depth so that the tip of the stirring pin F2 reaches the step bottom surface 12a, the entire length in the depth direction of the butted portion J1 can be joined.

  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 sealing body 3 so that the start end and the end end of the plasticizing region W2 overlap each other. The rotary tool F may be detached from the bonded metal member on the abutting portion J1, or may be separated on the end surface 11a of the peripheral wall portion 11.

  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 hollow container main body 2 and the sealing body 3 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. 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, the rotary tool F has a stirring pin F2 longer than the thickness of the sealing body 3, and in this joining process, it is preferable to perform friction stir welding over the entire length in the depth direction of the butt portion J1. In this embodiment, since the stirring pin F2 is inserted to the position reaching the step bottom surface 12a, the overlapping portion where the step bottom surface 12a and the back surface 3b of the sealing body 3 are overlapped can also be friction stir welded. Thereby, the watertightness and airtightness of the hollow container 1 can be improved. Further, by performing the temporary joining step, it is possible to prevent the opening of the butt portion J1 during the main joining step.

[Second Embodiment]
Next, the manufacturing method of the hollow container which concerns on 2nd embodiment of this invention is demonstrated. In the manufacturing method of the hollow container which concerns on 2nd embodiment, a preparatory process, an arrangement | positioning process, a temporary joining process, and a main joining process are performed. The hollow container manufacturing method according to the second embodiment is different from the first embodiment in the temporary joining step. Since the preparation step, the placement step, and the main joining step are the same as those in the first embodiment, the description thereof is omitted.

  As shown in FIG. 6, the temporary joining step is a step of temporarily joining the hollow container body 2 and the sealing body 3 by welding. 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 J1, and the spot temporary joining step is performed in a spot shape along the abutting portion J1. 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. The same effects as those of the first embodiment can be obtained by the second embodiment described above.

  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 Hollow container main body 3 Sealing body 3a Surface 3b Back surface 3c Side surface 10 Bottom part 11 Peripheral wall part 11a End surface 12 Step part 12a Step bottom surface 12b Step side surface 13 Concave part F Rotation tool (Rotary tool for temporary joining, temporary tool for temporary joining) )
F2 Stirring pin J1 Butt part W1 Plasticization region W2 Plasticization region

Claims (6)

A hollow container body having a bottom part and a peripheral wall part rising from a peripheral edge of the bottom part, and a sealing body for sealing an opening of the hollow container body, and a hollow for joining the hollow container body and the sealing body A method of manufacturing a container,
A step of forming a stepped portion having a stepped bottom surface and a stepped side surface rising from the stepped bottom surface on the inner peripheral edge of the peripheral wall portion;
An arrangement step of disposing the sealing body in the hollow container body and forming a butt portion by abutting the side surface of the step and the side surface of the sealing body;
A temporary joining step of inserting a stirring pin of a rotating tool for temporary joining that rotates into the butting portion, and performing spot tacking by frictional stirring in a state where only the stirring pin is in contact with the hollow container body and the sealing body; ,
Friction stir by inserting a stirring pin of the rotating tool for main joining to rotate into the butting portion and moving only the agitating pin along the butting portion in a state where only the stirring pin is in contact with the hollow container body and the sealing body. A method for manufacturing a hollow container, comprising: a main joining step for joining.   The method for manufacturing a hollow container according to claim 1, wherein the temporary joining rotary tool is the same as the main joining rotary tool. The main joining rotary tool has a stirring pin longer than the thickness of the sealing body,
3. The method for manufacturing a hollow container according to claim 1, wherein in the main joining step, friction stir welding is performed over the entire length of the butt portion in the depth direction. A hollow container body having a bottom part and a peripheral wall part rising from a peripheral edge of the bottom part, and a sealing body for sealing an opening of the hollow container body, and a hollow for joining the hollow container body and the sealing body A method of manufacturing a container,
A step of forming a stepped portion having a stepped bottom surface and a stepped side surface rising from the stepped bottom surface on the inner peripheral edge of the peripheral wall portion;
An arrangement step of disposing the sealing body in the hollow container body and forming a butt portion by abutting the side surface of the step and the side surface of the sealing body;
A temporary joining step of performing spot tacking by welding along the butt portion;
Friction stir by inserting a stirring pin of the rotating tool for main joining to rotate into the butting portion and moving only the agitating pin along the butting portion in a state where only the stirring pin is in contact with the hollow container body and the sealing body. A method for manufacturing a hollow container, comprising: a main joining step for joining.   The method for manufacturing a hollow container according to claim 4, wherein MIG welding, TIG welding, or laser welding is performed in the temporary joining step. The main joining rotary tool has a stirring pin longer than the thickness of the sealing body,
6. The method for manufacturing a hollow container according to claim 4, wherein in the main joining step, friction stir welding is performed over the entire length in the depth direction of the butt portion.

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