JP2008194552A - Metal carrier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal carrier capable of judging the position of a solder foil with respect to an outer cylinder from outward appearance. <P>SOLUTION: In the metal carrier equipped with a core part 2, which is formed into a honeycomb structure by superposing metal plates 4 and 5, at least one of which is formed into a corrugated shape, and winding the plates into a cylindrical shape, a solder foil 8 wound around the core part 2, and an outer cylinder 3 inside which the core part 2 around which the solder foil 8 is wound are integrally press-fit, a through-hole 7 is formed to the surface of the outer cylinder 3 at a predetermined position so as to pierce the outer cylinder 3 and closed by the capillary phenomenon of the solder material 9 formed by melting the solder foil 8. The through-hole 7 is used as a position detecting hole showing the insertion position of the solder foil 8 with respect to the outer cylinder 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a metal carrier, and relates to a technique that enables the appearance of whether or not a brazing foil wound around a peripheral surface of a core portion is in a correct position with respect to an outer cylinder.

  For example, in a catalytic converter for automobiles, corrugated plates and flat plates or corrugated plates having different heights are overlapped to form a cylindrical shape, and the cylindrical core portion is press-fitted into an outer cylinder such as stainless steel and joined and integrated. A metal carrier is used (see, for example, Patent Document 1).

  Before the core portion is press-fitted into the outer cylinder, a brazing foil (band-shaped brazing foil) made of amorphous Ni is wound around the peripheral surface of the core portion. And the core part by which the wax foil was wound around the surrounding surface is press-fitted in the outer cylinder, heated in the furnace, and joined and integrated by diffusion bonding.

Corrugated plates and flat plates or corrugated plates having different heights are joined by diffusion bonding, and the outer periphery of the core portion and the outer cylinder are brazed with a brazing material in which the brazing foil is melted.
JP 2004-74184 A

  However, the joining position of the core portion and the outer cylinder by the brazing foil is very important in terms of heat resistance design.

  However, since it has a structure in which the core portion is press-fitted into the outer cylinder, it cannot be confirmed from the appearance where the brazing foil is located.

  Then, this invention is made | formed in view of the above-mentioned actual condition, and it aims at providing the metal support | carrier which can judge the position of the brazing foil with respect to an outer cylinder from appearance.

  The invention according to claim 1 is a core portion in which at least one of two metal plates each having a corrugated shape is wound into a cylindrical shape by overlapping and a brazing foil wound around the core portion. A metal carrier comprising a core portion around which the brazing foil is wound and press-fitted into the inside thereof, and is integrally joined to form a through-hole penetrating inward and outward at a predetermined position on the surface of the outer cylinder. The through hole is blocked by capillary action of the brazing material in which the brazing foil is melted.

  A second aspect of the present invention is the metal carrier according to the first aspect, wherein the through hole is used as a position detection hole that indicates an insertion position of the brazing foil with respect to the outer cylinder. .

  The invention according to claim 3 is the metal carrier according to claim 2, wherein the through hole is determined as a normal position of the brazing foil when the through hole is blocked by the capillary action of the brazing material, and the through hole The case where it is not blocked by the capillary phenomenon of the brazing material is determined as an irregular position of the brazing foil.

  According to the first aspect of the present invention, when the through-hole penetrated inside and outside at a predetermined position on the surface of the outer cylinder is blocked by the capillarity of the brazing material in which the brazing foil wound around the core portion is melted, It can be determined that the brazing foil is in the correct position with respect to the outer cylinder. Therefore, it can be easily identified from the appearance of the metal carrier whether or not the wax foil is in a correct position with respect to the outer cylinder. Further, since the through hole is blocked by the capillarity of the brazing material, there is no worry about gas leakage or durability.

  According to the second aspect of the present invention, since the through hole formed in the outer cylinder is used as a position detection hole indicating the insertion position of the wax foil with respect to the outer cylinder, the position of the wax foil is detected with a simple structure. can do.

According to the invention described in claim 3, to determine when the through hole is blocked by the capillary action of the brazing material and the normal position of the brazing foil, if not through holes, such closed by capillary action of the brazing material Since it is determined that the solder foil is an irregular position, it is possible to determine the exact position of the solder foil simply by looking at the through hole.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a metal carrier according to the present embodiment, FIG. 2 is an enlarged cross-sectional view of a main portion of a through-hole portion formed in an outer cylinder of the metal carrier according to the present embodiment, and FIG. 3 is a metal according to the present embodiment. FIG. 4 shows a manufacturing process of the carrier, a perspective view of the process of forming the core part by overlapping the corrugated plate and the flat plate, FIG. 4 shows the manufacturing process of the metal carrier of the present embodiment, and a brazing foil is wound around the peripheral surface of the core part FIG. 5 is a sectional view of the metal carrier after the core portion is press-fitted into the outer cylinder and diffusion-bonded.

  As shown in FIG. 1, the metal carrier 1 includes a core portion 2 having a honeycomb structure and a cylindrical outer cylinder 3 for press-fitting the core portion 2 into the inside thereof. 3 is heated in a furnace and joined and integrated by diffusion bonding, and then a catalyst is applied to the core portion 2 to form. Those space portions formed by overlapping the corrugated plate 4 and the flat plate 5 become the cell portion 6, and exhaust gas passing through the cell portion 6 is purified by passing through this space.

  In the present embodiment, as shown in FIG. 2, a through hole 7 that penetrates inward and outward is formed at a predetermined position on the surface of the outer cylinder 3, and the through hole 7 is a belt-like shape wound around the core portion 2. The brazing foil 8 is in a state of being blocked by the capillarity of the brazing material 9 melted and melted during diffusion bonding.

  The through hole 7 is provided at the joining position because the joining position of the core portion 2 and the outer cylinder 3 is determined at a predetermined position in terms of heat resistance design. The through hole 7 is preferably a circular hole having a diameter of about 0.5 mm to 1.0 mm in consideration of the filling property and workability of the brazing material 9.

  Further, when one through hole 7 is provided for the width W of the brazing foil 8, the through hole 7 is provided at a position corresponding to the central position of the width of the brazing foil 8. In addition, it is avoided to provide the through hole 7 at a position where a gap is easily left between the core portion 2 and the outer cylinder 3.

  If the through hole 7 is closed by the capillary phenomenon of the brazing material 9, it can be determined that the insertion position of the brazing foil 8 with respect to the outer cylinder 3 is in the correct normal position. On the other hand, when the through hole 7 is not closed by the capillarity of the brazing material 9, it can be determined that the insertion position of the brazing foil 8 with respect to the outer cylinder 3 is an irregular position that is not in the correct position.

  Thus, by visually observing the state of the through hole 7 as a position detection hole indicating the insertion position of the wax foil 8 with respect to the outer cylinder 3, the insertion position of the wax foil 8 can be easily checked. Since the position of the brazing foil 8 may be shifted when the core part 2 is press-fitted into the outer cylinder 3, anyone can easily check the state of the through-hole 7 from the appearance of the metal carrier 1. And the joining state of the outer cylinder 3 can be confirmed.

  Next, the manufacturing method of the metal carrier 1 of this Embodiment is demonstrated.

  First, as shown in FIG. 3, for example, a corrugated plate 5 made of a stainless steel plate having a thickness of 30 to 50 microns and a flat plate 5 made of a stainless steel plate are wound around an overlapping core material (not shown). Cylindrical shape. And the core part 2 is completed by carrying out spot welding of the last winding part. In addition to spot welding, temporary fixing with an adhesive may be used.

  Next, as shown in FIG. 4, a band-shaped brazing foil 8 made of amorphous Ni is wound around a predetermined position on the peripheral surface of the core portion 2.

  Then, as shown in FIG. 5, the core portion 2 around which the wax foil 8 is wound is press-fitted into the outer cylinder 3. Next, the metal carrier 1 in which the core portion 2 is press-fitted into the outer cylinder 3 is placed in a furnace and heated for diffusion bonding. Then, for example, the corrugated plate 4 and the flat plate 5 are diffusion bonded at 1250 ° C., and the core portion 2 and the outer cylinder 3 are brazed at 1100 ° C. Further, if the brazing foil 8 is provided at the correct regular position with respect to the outer cylinder 3, the through hole 7 is filled and closed by the capillary phenomenon of the brazing material 9 when the brazing foil 8 is melted. If the brazing foil 8 is misaligned with the outer cylinder 3 at the time of press-fitting and is in an incorrect irregular position, the through hole 7 is not blocked by the capillarity of the brazing material 9.

  Thus, by visually identifying the state of the through hole 7 from the appearance of the metal carrier 1, the insertion position of the wax foil 8 with respect to the outer cylinder 3 can be easily examined. Further, since the through hole 7 is filled with the brazing material 9, there is no problem in terms of gas leakage and durability.

  Although specific embodiments to which the present invention is applied have been described above, the above-described embodiments are examples of the present invention and are not limited to these embodiments.

  For example, in the above-described embodiment, one through hole 7 that functions as a position detection hole indicating the insertion position of the wax foil 8 with respect to the outer cylinder 3 is formed in the outer cylinder 3, but as shown in FIG. Two 7 may be provided. In this case, the distance A between the two through holes 7 and 7 is preferably 80% to 90% (A = 0.8 W to 0.9 W) with respect to the width W of the brazing foil 8. Thus, by providing the two through holes 7 in the width direction of the brazing foil 8, the insertion position of the brazing foil 8 with respect to the outer cylinder 3 can be detected more accurately.

  Further, in the above-described embodiment, the corrugated plate 4 and the flat plate 5 are wound around the core material to form the cylindrical core portion 2. However, the core material is formed by stacking the corrugated plates 4 having different wave heights. Needless to say, the same effect can be obtained by winding the wire around the cylindrical core portion 2.

  Further, in the above-described embodiment, the core portion 2 and the outer cylinder 3 are formed in a cylindrical shape. However, the same operational effects as those in the above-described embodiment can be obtained even when an elliptical cylindrical shape is used.

It is a perspective view of the metal carrier of this Embodiment. It is a principal part expanded sectional view of the through-hole part formed in the outer cylinder in the metal carrier of this Embodiment. It is a perspective view of the process which shows the manufacturing process of the metal carrier of this Embodiment, and forms a core part by overlapping a corrugated sheet and a flat plate. It is a perspective view which shows the manufacturing process of the metal support | carrier of this Embodiment, shows the process of winding a brazing foil around the surrounding surface of a core part, and inserting in an outer cylinder. It is sectional drawing of the metal support | carrier after press-fitting a core part to an outer cylinder and showing diffusion joining, showing the manufacturing process of the metal support | carrier of this Embodiment. When two through-holes are formed in the outer cylinder, it is a cross-sectional view of the metal carrier after the outer cylinder is press-fitted into the core portion and diffusion bonded.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Metal carrier 2 ... Core part 3 ... Outer cylinder 4 ... Corrugated sheet 5 ... Flat plate 6 ... Cell part 7 ... Through-hole 8 ... Brazing foil 9 ... Brazing material

Claims (3)

Two metal plates (4, 5), at least one of which is corrugated, are overlapped and wound into a cylindrical shape, and the core portion (2) having a honeycomb structure is wound around the core portion (2). In a metal carrier comprising a foil (8) and an outer tube (3) in which a core portion (2) around which the wax foil (8) is wound is press-fitted and integrated.
A through hole (7) penetrating inward and outward was formed at a predetermined position on the surface of the outer cylinder (3), and the through hole (7) was closed by a brazing material (9) in which the brazing foil (8) was melted. A metal carrier characterized by that. The metal carrier according to claim 1,
The metal carrier, wherein the through hole (7) is used as a position detection hole that indicates an insertion position of the wax foil (8) with respect to the outer cylinder (3). The metal carrier according to claim 2,
The case where the through hole (7) is blocked by the brazing material (9) is determined as the normal position of the brazing foil (8), and the through hole (7) is blocked by the brazing material (9). The metal carrier characterized by judging that the case where there is not an irregular position of the brazing foil (8).

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