JP6638983B2 - Pipe parts - Google Patents

Description

  The present invention relates to a pipe part in which an end of a pipe is sealed.

  2. Description of the Related Art Conventionally, pipe parts obtained by flattening the ends of pipes have been used as pipe parts such as fuel tank guards and various reinforcing materials for automobiles. Since the inside of these pipe parts is hollow, if the end of the pipe is not sufficiently sealed, paint that has penetrated into the inside from the end of the pipe when performing surface treatment such as painting may be used. It was blown out by the high heat in the drying oven, causing poor appearance. In addition, if the end of the pipe is not sufficiently sealed, air flows in and out of the end of the pipe even after the pipe component is incorporated into the product, causing corrosion from inside the pipe.

  For this reason, in order to reliably seal the end of the pipe, Japanese Patent Application Laid-Open No. 2014-69231 (Patent Document 1) discloses a method in which an embossed groove is formed at the end of a flat crushed pipe and the end of the pipe is formed. A technique for sealing a part is disclosed. For the same purpose, Japanese Patent Application Laid-Open No. 2003-145220 (Patent Document 2) discloses a technique of performing seam welding or laser welding so as to cross an end of a flat crushed pipe to seal the end of the pipe. Is disclosed. Furthermore, Japanese Patent Application Laid-Open No. 2002-35850 (Patent Document 3) discloses a technique for sealing an end of a pipe by welding an end face of the end of the pipe which is crushed flat.

JP 2014-69231 A JP 2003-145220 A JP-A-2002-35850

  However, in order to improve the strength, the pipe part is bent by bending both edges in the width direction of the pipe in one direction, as shown in FIG. , And are often formed in a substantially U-shaped cross section. In such a case, the techniques disclosed in Patent Literature 1 and Patent Literature 2 have a problem that it is difficult to process the upright edge 113 and the bent portion of the upright edge, and it is difficult to completely seal them. . In addition, in the technique disclosed in Patent Document 3, high accuracy is required for positioning the pipe, and the end face 115 is easily deformed by heat due to welding, so that the contact between the pipe part and other parts on the mounting side is uniform. There was a problem that it was difficult to become.

  The present invention has been made in view of the above points, and reliably seals even the end of a pipe provided with an upright edge, without deforming the end face of the pipe, the pipe part and the mounting side. It is an object of the present invention to provide a pipe part which can make the contact uniform.

The pipe part of the present invention is a pipe part provided with a connection part by crushing an end of the pipe flat, wherein the connection part has a flattened connection seat surface, and a pipe part of the connection seat surface. An upright edge formed by bending an edge along the axis of the, and a flat crushed flat end formed on the distal end side of the connection seat surface and the upright edge, The connection seat surface and the flat end are irradiated from the surface of the flat end portion, and the flat end portion is laser-welded from one end to the other end in the width direction of the pipe. A portion (hereinafter, referred to as an abutting portion) in which two plates forming an end portion are joined , and a connecting hole and a seat surface such as a bolt around the connecting hole abut on the connecting seat surface. The welding bead by laser welding is provided in the connection seat surface in the axial direction of the pipe. Through the inside of the abutting portion so as to surround the abutting portion except for a tip side direction of the pipe in the axial direction, wherein the upright edge is at least in the axial direction of the pipe more than the connection hole. Is provided so as to extend to the tip side .

  According to the pipe part of the present invention, while improving the strength by providing the upright edge portion on the connecting seat surface, since the connecting seat surface and the flat end portion crushed on the tip side of the upright edge portion, laser welding is performed. It can be applied across the pipe from one end of the flat end to the other. Thereby, the weld bead is not applied to the upright edge portion, and only the flat portion needs to be welded, so that the end of the pipe can be reliably sealed. In addition, since the connection seat surface and the flat end are subjected to laser welding, the two plates forming the connection seat surface and the flat end are joined by welding to be integrated, thereby increasing the strength of the connection portion. In addition, since welding is not performed on the end face of the pipe, that is, on the tip of the flat end, the end face of the pipe is not deformed by heat generated by welding.

Preferred examples of the pipe part of the present invention are:
The connection seat surface includes a connection hole,
A weld bead formed by laser welding passes through the inside of the connection hole in the connection seat surface in the axial direction of the pipe.

  According to a preferred example of the pipe part of the present invention, since the weld bead passes through the inside of the connection hole, paint or the like does not enter the inside of the pipe from the connection hole. Further, when a fastener such as a bolt is penetrated into the connection hole and the pipe part is mounted on another member, it is possible to perform laser welding while avoiding a portion in contact with a seat surface such as a bolt. This makes it possible to flatten the portion that comes into contact with the bearing surface of the bolt or the like, and to securely tighten the bolt or the like.

Preferred examples of the pipe part of the present invention are:
A weld bead formed by laser welding does not penetrate the connection seat surface and the back surface of the flat end portion.

  According to a preferred example of the pipe part of the present invention, since the weld bead does not penetrate the back surface of the connection seat surface and the flat end portion, unevenness due to the weld bead cannot be formed on the connection seat surface and the back surface of the flat end portion, The contact with other members on the mounting side can be made in a more favorable state.

Preferred examples of the pipe part of the present invention are:
At least a part of the unevenness of the weld bead by laser welding is pressed and flattened.

  According to a preferable example of the pipe part of the present invention, since the weld bead that appears on the surface of the connection seat and the flat end portion is pressed and flattened, for example, the connection seat is small, and the seat such as a bolt is welded. Even in the case where it comes over the bead, it is possible to tighten the bolt well.

  As described above, according to the pipe part of the present invention, it is possible to securely seal even the end part of the pipe provided with the upright edge part and to make the pipe part without deformation of the end face of the pipe. it can.

It is a top view of the connection part of the pipe part which concerns on one Embodiment of this invention. It is a side view of the connection part shown in FIG. It is a front view of the connection part shown in FIG. It is a figure explaining joining by laser welding. It is a figure explaining press processing of a welding bead. It is a front view of the connection part of the conventional pipe part.

  Hereinafter, embodiments of a pipe part of the present invention will be described in detail with reference to the accompanying drawings. 1 is a plan view of a connecting portion 10 of a pipe part 1 according to an embodiment of the present invention, FIG. 2 is a side view of the connecting portion 10 shown in FIG. 1, and FIG. 3 is a front view of the connecting portion 10 shown in FIG. is there. FIG. 4 is a diagram for explaining joining by laser welding, and FIG. 5 is a diagram for explaining press working of the weld bead 20.

  As shown in FIGS. 1 to 3, the pipe part 1 of the present embodiment is provided with a connecting part 10 for crushing the end of the pipe flat and connecting it to another member. 10 includes a connection seat surface 11, a standing edge 13, and a flat end 14. Further, in order to seal the connecting portion 10, two plates forming the connecting seat surface 11 and the flat end portion 14 are joined by laser welding irradiated from the surfaces of the connecting seat surface 11 and the flat end portion 14. ing.

  The connection seat surface 11 is formed by flattening the end of the pipe by crushing the end of the pipe, and gradually flattened from the inner side in the axial direction of the pipe, and the plate constituting the pipe is flattened from the middle and becomes a two-ply stack. ing. Further, a flattened portion of the connection seat surface 11 is provided with a connection hole 12 through which a bolt or the like penetrates, and the connection seat surface 11 and another member are joined by the bolt or the like. Note that, in FIG. 1, a portion around the connection hole 12 with which a bearing surface such as a bolt abuts is indicated by a broken line. Further, depending on the mode of the connection seat surface 11, the connection hole 12 may not be provided.

  The upright edge portion 13 has a flange shape formed by bending an edge of the connection seat surface 11 along the axis of the pipe, and has a substantially U-shaped cross section together with the connection seat surface 11. The upright edge portion 13 is provided mainly for improving the strength of the connecting portion 10. Depending on the shape of another member to be attached, only one of the edges of the connecting seat surface 11 has the upright edge portion 13. There may be a case in which the provided substantially L-shaped cross section, the substantially Z-shaped cross section in which the upright edge portion 13 is bent in different directions at both edges of the connection seat surface 11, and the like.

  The flat end portion 14 is a flat crushed portion formed on the distal end side of the connection seat surface 11 and the upright edge portion 13, and the surface is configured to be continuous from the connection seat surface 11. In addition, it is preferable that the flat end portion 14 is not formed by shortening the upright edge portion 13 but is provided so as to extend to the original connection seat surface 11 and the tip of the upright edge portion 13. With this configuration, the length of the upright portion 13 can be ensured, and the strength of the connecting portion 10 can be equal to or greater than that of a conventional product.

  The flat end 14 is laser-welded from one end E1 to the other end E2 in the width direction of the pipe, and a weld bead 20 by laser welding is formed on the connection seat surface 11 and the flat end 14. In this laser welding, as shown in FIG. 4, irradiation is performed from the surfaces of the connection seat surface 11 and the flat end portion 14, and the welding bead 20, that is, the penetration depth reaches the connection seat surface 11 and the back surface of the flat end portion 14. I haven't. Thereby, the back surfaces of the connection seat surface 11 and the flat end portion 14 can be kept flat while the two portions forming the connection seat surface 11 and the flat end portion 14 are joined and the connection portion 10 is sealed. it can. Further, since the end face 15 of the flat end portion 14 is not welded, the end face 15 is not deformed.

  Further, in the pipe part 1 of the present embodiment, as described above, the connection seat surface 11 is provided with the connection hole 12 through which a bolt or the like penetrates. For this reason, the weld bead 20 formed by laser welding is curved inward in the axial direction of the pipe, thereby avoiding a portion where a bearing surface such as a bolt abuts. As a result, the portion where the bearing surface such as the bolt abuts is kept flat. When the connection hole 12 is not provided in the connection seat surface 11, it is not necessary to curve the weld bead 20 as in the present embodiment, and the flat end portion 14 has one end E1 in the width direction of the pipe and the other end. Laser welding may be performed linearly up to the end E2.

  Further, when the area of the connection seat surface 11 is small and a seat surface such as a bolt abuts on the welding bead 20, as shown in FIG. , Can be processed flat.

  As described above, according to the pipe part of the present embodiment, since the flat part crushed flat is formed on the distal end side of the connecting seat surface and the upright edge part, laser welding for sealing is performed. This can be performed on the same plane, and the connecting portion can be reliably sealed. Further, since the two plates forming the connection seat surface and the flat end are joined by welding, the strength of the connection portion can be improved.

  In addition, since the laser welding is performed from the surface of the connecting seat surface and the flat end portion and does not penetrate the back surface, the back surface of the connecting seat surface and the flat end portion are kept flat, and the other member to be attached is mounted. The hit can be made uniform.

  In addition, in the configuration in which the connection seat surface is provided with the mounting hole, since the welding surface is welded so as to avoid a portion where the seat surface such as a bolt abuts, unevenness due to a weld bead cannot be formed in the portion, and a flat state is maintained. And the bolts and the like can be satisfactorily tightened.

  Further, when the welding bead is brought into contact with a seating surface such as a bolt, at least a portion of the unevenness of the welding bead where the seating surface such as the bolt is abutted is pressed and flattened to form a flat joint. Laser welding can be performed even when the surface area is small.

  The above-described pipe parts are examples of the present invention, and the configuration thereof can be appropriately changed without departing from the spirit of the invention.

1. Pipe parts,
10, connecting portion, 11 connecting seat surface, 12 connecting hole, 13, 113 standing edge portion, 14 flat end portion, 15, 115 end face,
20 ・ ・ Weld beads,

Claims (4)

A pipe part provided with a connecting portion by crushing the end of the pipe flatly,
The connecting portion,
A flatly crushed connecting seat surface,
An upright edge formed by bending an edge of the connection seat surface along the axis of the pipe,
A flat end crushed flat formed on the distal end side of the connection seat surface and the upright edge,
The connection seat surface and the flat end portion are irradiated from the surface, and the flat end portion is laser-welded from one end to the other end in the width direction of the pipe, so that the connection seat surface and the Two plates constituting the flat end are joined ,
A connection hole is provided on the connection seat surface, and a portion (hereinafter, referred to as an abutment portion) where a seat surface such as a bolt around the connection hole is in contact with the connection hole,
A weld bead by laser welding is provided so as to pass through the inside of the abutting portion in the axial direction of the pipe of the connection seat surface and surround the abutting portion except for a tip side direction of the pipe in the axial direction,
The pipe component , wherein the upright edge portion is provided so as to extend at least to a tip side in the axial direction of the pipe than the connection hole . The pipe part according to claim 1, wherein the welding bead includes a portion extending in an axial direction of the pipe and a portion extending in a direction perpendicular to the axial direction of the pipe.   The pipe part according to claim 1, wherein a part of the welding bead is provided at a position closer to a tip end in an axial direction of the pipe than the contact part. The pipe part according to any one of claims 1 to 3 , wherein a welding bead formed by laser welding does not penetrate the connection seat surface and the back surface of the flat end portion.

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