JP2008279455A - Hollow space formed product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automobile closure component which has an excellent appearance and sufficient strength in its jointed portions without causing indentations and fused portions in the jointed portions, and further to provide its manufacturing method. <P>SOLUTION: A hollow space formed product 1 includes a closed hollow space or a hollow space having opening portions formed between two metallic panels by putting the two formed metallic panels 2, 3 together. The edge portion formed by overlapping the flange portions 5 of the two mated metallic panels except the opening portions is welded by the electromagnetic seam pressure welding. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a space forming product, more specifically, two molded metal panels such as a container such as an automobile fuel tank, a branched container, and a fluid passage are combined and closed between the metal panels. The present invention relates to a space portion forming product formed by forming a space portion having an open portion.

  Conventionally, an automobile fuel tank is made of an aluminum-plated steel sheet for rust prevention. Specifically, it is produced by combining two panels, which are formed into a dome shape by press molding or the like and formed with a collar at the end, and the superposed collar is joined by resistance seam welding or arc welding. Yes.

  In recent years, weight reduction of transportation equipment has been demanded from the viewpoint of environmental protection, and the use of aluminum materials has also been promoted for automobile members. However, when the fuel tank is made of aluminum material, the resistance seam welding has a problem that the electrode wear becomes severe due to eutectic melting between the electrode ring and the aluminum base material. However, there is a drawback that distortion is increased. According to FSW (friction stir welding), the above problem can be solved, but there is a problem in productivity because the joining speed is slow.

In contrast to the above bonding method, metal plates are arranged in an overlapping manner, electrode coils are arranged on one side, a discharge current is caused to flow rapidly through the coils, eddy currents are generated in the metal plates, and Joule heating is performed. A method has been proposed in which an electromagnetic force acting in a direction in which the two are pressed against each other is instantaneously generated, the metal plates collide with each other, and solid phase bonding is performed in a bonding time of several microseconds (Patent Document 1, Patent). Reference 2, see non-patent literature).
JP 11-192562 A JP 2004-42085 A Summary of Welding Society 2005 Spring Conference Lectures, page 128, Tomokazu Aizawa, Keigo Okakawa, Nobuo Henmi “Circular Electromagnetic Seam Welding of Metal Sheets”

  The present invention has found that when the above joining method is applied to the production of an aluminum automobile fuel tank, it is possible to form a joint that can solve the conventional problems. In addition, it was made as a result of finding that it can also be applied to the production of a space part-formed product formed by forming a space part that is closed or partially opened between the metal panels. An object of the present invention is to provide a space-part-formed product that has excellent appearance and has sufficient strength without formation of distortion, indentation, and melted part at the joint, and has good productivity.

  In order to achieve the above object, a space part forming product according to claim 1 is a space part forming product in which two metal panels are combined to form a space part having a space part or an open part closed between the metal panels. And the site | parts other than the said open part are the electromagnetic seam pressure welding among the edge parts formed by superposing | stacking the collar part of the edge part of the two said metal panels combined.

  According to a second aspect of the present invention, there is provided a space portion formed product according to the first aspect, wherein a hem-processed portion is formed on a collar portion of one of the two metal panels, and the hem-processed portion includes two metal panels. Of the three overlapping edge portions formed by inserting the flange portion of the other metal panel, a portion other than the open portion is in electromagnetic seam pressure contact.

  The space portion formed product according to claim 3 is characterized in that, in claim 2, a portion other than the opening portion is filled with a sealing agent or an adhesive in the edge portion of the three-layered stack.

  The space part formed product according to claim 4 is a space part formed product in which two molded metal panels are combined and a space part of an arbitrary shape is formed between the metal panels, and two pieces other than the space part are formed. The overlap portion of the metal panel is electromagnetic seam pressure welded.

  According to the present invention, there is provided a space-formed product that has excellent appearance and has a sufficient strength without formation of distortion, indentation, and melted portion in the bonded portion, and has good productivity. The

  The space part forming product of the present invention is a space part forming product in which two metal panels are combined, and a space part having a space part or an open part closed between these metal panels is formed. Of the edge part formed by superposing the flanges of the edge part of the sheet of metal sheet, the part other than the open part is subjected to electromagnetic seam pressure welding. The electromagnetic seam pressure welding of the edge part is as follows. It is done as follows.

  Molded by press molding, hydraulic bulge molding, draw molding, impact molding, electromagnetic molding, warm molding, superplastic molding, etc. For example, in the case of an automobile fuel tank, it is molded into a dome shape and a collar is formed at the end Combine two flat ellipsoidal metal panels, or combine a flat ellipsoidal metal panel formed into the dome shape and having a flange at the end, and a flat metal panel with the end as a flange. The edge portion where the collar portion is superposed is electromagnetically welded to form a closed space portion. In the case of forming a partially opened space, electromagnetic seam pressure welding is performed on a portion other than the open portion of the edge portion where the collar portion is superposed. As the metal panel, preferably, an aluminum (including an alloy, the same applies hereinafter) panel, a copper (including an alloy, the same applies hereinafter) panel, a steel panel, or a combination thereof is applied.

  In this case, the electromagnetic seam pressure welding is performed in such a manner that the flanges to be joined at the edge portions can be pressed against each other or have a gap of several mm or less, an electrode coil is disposed on one side, and the other side is backed. By applying a tool, an instantaneous large current is passed through the electrode coil, and an electromagnetic force acting in a direction in which the flanges are pressed against each other is instantaneously generated in the flanges on the coil side. This is performed by causing the parts to collide with each other and instantaneously pressing and integrating the collar part at the joint site.

  Hereinafter, an embodiment of electromagnetic seam pressure welding will be described using an automobile fuel tank forming a closed space as an example. As shown in FIG. 1 and FIG. 2, when the fuel tank 1 is produced by electromagnetic seam pressure welding of two metal panels, as shown in FIG. 1, it is formed into a dome shape and forms flanges 5 and 5 respectively. The two flat elliptical metal panels 2 and 3 are combined, or as shown in FIG. 2, the flat elliptical metal panel 2 formed into a dome shape to form the flange portion 5 and the end portion The plate-like metal panel 4 as a part is put together, and the edge E where the flanges 5 and 5 are overlapped is subjected to electromagnetic seam pressure welding.

  In 2nd Embodiment, as shown to E-1 of FIG. 3, 1 round of the elliptical edge part E of the fuel tank 1 is electromagnetic seam pressure-welded. In 2nd Embodiment, as shown to E-2 of FIG. 3, two seams of the elliptical edge part E of the fuel tank 1 are welded by electromagnetic seam pressure in parallel. Reference numeral 7 denotes an electrode coil, and 8 denotes a backing jig arranged to face the electrode coil 7. Electromagnetic seam pressure welding of the edge E can be performed in a plurality of times. In this case, the seam pressure welding is performed by superimposing the second electromagnetic seam pressure welding line 5 to 50 mm on the first electromagnetic seam pressure welding line. Is preferably continued.

  In the third embodiment, as shown by E-3 in FIG. 3, hemming is performed on one of the two metal panels 2 and 3 constituting the fuel tank 1, for example, a collar portion of the panel 2. The portion 6 is formed, and the three-layered edge E formed by inserting the collar portion of the metal panel 3 into the hem processing portion 6 is subjected to electromagnetic seam pressure welding. In FIG. 3, the electrode coil 7 and the backing jig 8 may be arranged in reverse.

  In the fourth embodiment, a three-layered edge shown in E-3 of FIG. 3 is filled with a sealing agent such as silicone or an adhesive such as epoxy resin, thereby obtaining a stronger bond. It is done.

  In still another embodiment of the present invention, a metal panel molded so as to form a space portion having a predetermined shape is formed between two metal panels to be polymerized, and the two metal panels other than the space portion are combined. A space portion formed product is produced by electromagnetic seam welding of the overlapping portion, and FIG. 4 shows, as one embodiment, overlapping portions 13 other than the pipe-like space portions 12 of the two metal panels 10 and 11. The heat exchanger piping material 9 formed by electromagnetic seam pressure welding is shown.

  A metal pipe bent into the predetermined shape is attached between the metal panels formed so that a space portion of a predetermined shape is formed between the two metal panels to be superposed, and other than the space portion Electromagnetic seam pressure welding can also be performed on the overlapping portion of the metal panel.

  Examples of the present invention will be described below. These examples show one embodiment of the present invention, and the present invention is not limited thereto.

Example 1
To form a fuel tank for automobiles, two aluminum panels (5052 alloy, tempered: O material, plate thickness: 2 mm, oval circumference: 550 mm × 880 mm) pressed into the shape shown in FIG. As shown to E-1 of FIG. 3, the electrode coil made from chromium copper and the backing jig | tool were arrange | positioned, and the electromagnetic seam press-contact was carried out for 1 round of the edge part E. As shown in FIG.

  First, the electrode coil is energized at a voltage of 12 kV, and a seam pressure welding is performed on a region slightly more than half of the ellipse circumference to form a joining line. Electromagnetic seam pressure welding was performed to form a joining wire. When the water pressure test was conducted, it was confirmed that the portion other than the joint portion was broken and the pressure contact portion had a problem-free joining property as a fuel tank.

Example 2
An aluminum panel (5052 alloy, tempered: O material, plate thickness: 2 mm, oval circumference: 550 mm × 880 mm) and a flat aluminum panel pressed into the shape shown in FIG. 1 to form an automobile fuel tank (5052 alloy, tempering: O material, plate thickness: 2 mm, oval circumference: 550 mm × 880 mm), and as shown in E-1 of FIG. 3, an electrode coil made of chromium copper and a backing jig are arranged. Then, one round of the edge E was welded by electromagnetic seam.

  As in Example 1, first, an electrode coil is energized at a voltage of 12 kV, and a seam pressure is applied to a region slightly stronger than the elliptical circumference to form a joining line, and then the remaining half of the elliptical circumference is formed first. Electromagnetic seam pressure welding was performed so as to form a joining line by overlapping with the joining line 10 mm. When the water pressure test was conducted, it was confirmed that the portion other than the joint portion was broken and the pressure contact portion had a problem-free joining property as a fuel tank.

Example 3
In Example 1, as shown by E-2 in FIG. 3, two rounds of the elliptical edge E of the fuel tank 1 were subjected to electromagnetic seam pressure welding in parallel. When the water pressure test was conducted, it was confirmed that the portion other than the joint portion was broken and the pressure contact portion had a problem-free joining property as a fuel tank.

Example 4
A pure copper panel (thickness: 0.8 mm) press-molded so that a space portion having the shape shown in FIG. 4 is formed between two pure copper panels to be superposed, and a superposed portion of the pure copper panel other than the space portion is formed. Electromagnetic seam pressure welding. The produced heat exchanger piping material had performance suitable as a hot water supply piping material.

Example 6
Between the pure copper panels (thickness: 0.8 mm) press-molded so that a space portion having the shape shown in FIG. 4 is formed between two pure copper panels to be superposed, the shape of the space portion shown in FIG. A bent phosphorus-deoxidized copper pipe (thickness: 0.5 mm) was attached and combined, and the superposed portion of the pure copper panel other than the space portion was subjected to electromagnetic seam pressure welding. The produced heat exchanger piping material had performance suitable as a hot water supply piping material.

It is a figure which shows the Example of the manufacture form of the fuel tank for motor vehicles. It is a figure which shows the other Example of the manufacture form of the fuel tank for motor vehicles. It is a figure which shows embodiment by this invention for carrying out the electromagnetic seam pressure welding of the edge part of the fuel tank for motor vehicles. It is a figure which shows the Example of the heat exchanger piping material by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automobile fuel tank 2 Metal panel 3 Metal panel 4 Flat metal panel 5 Gutter part 6 Hem processing part 7 Electrode coil 8 Backing jig 9 Piping material 10 for heat exchangers Metal panel 11 Metal panel 12 Pipe-shaped passage 13 Polymerization Part E (oval shape) edge

Claims (4)

A space part forming product in which two metal panels are combined and a space part closed between the metal panels or a space part having an open part is formed, and a flange part at an end of the two metal panels combined Of the edge part formed by polymerizing the above, a part other than the open part is in contact with the electromagnetic seam. A hem-processed portion is formed on the collar portion of one of the two metal panels, and the hem-processed portion is formed by inserting the collar portion of the other metal panel in the two metal panels. 2. The space part-formed product according to claim 1, wherein a part other than the open part among the edge portions of the three stacked layers is in electromagnetic seam pressure contact. The space forming product according to claim 2, wherein a portion other than the opening portion is filled with a sealing agent or an adhesive among the three edge portions. This is a space-formed product in which two formed metal panels are combined and a space portion having an arbitrary shape is formed between the metal panels, and the overlap portion of the two metal panels other than the space portion is subjected to electromagnetic seam pressure welding. Space part formation product characterized by being made.

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