JP2000084633A - Tubular structure and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a product precision as well as joining strength by providing a plate having a hole and a tube inserted into the hole, forming a filleted part in contact with one face of the plate and forming a flared part in contact with the other face of the plate. SOLUTION: The hole 4 having the same diameter as a tube 1 is pierced in a plate 2, a filleted part 8 of one round is worked to an end part of the tube 1, the end part of the tube 1 is inserted into the hole 4. After the filleted 8 is abutted on a rear face of the plate 2, an end part of the tube 1 protruding upward from an upper face of the plate 2 is flared to form the flared part 9. A material of the tube 1 and plate 2 is an aluminum alloy of JIS3004 group, the plate 2 and the tube 1 are mechanically joined by flaring the filleted part 8 and a flared part 9. An end part of the tube and a hole peripheral part of the plate may be curled to the other face side of the plate. A spacer may be provided between the flared part and the plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube sheet structure formed by mechanically joining a tube material vertically to a sheet material and a method of manufacturing the same, and more particularly, to a wire spool for winding and storing a welding wire. And a method for manufacturing the same.

[0002]

2. Description of the Related Art A spool of a welding wire has a plurality of body pillars, which are pipe members, arranged between two disk-shaped flanges having a circular hole at the center thereof, the plurality of body pillars being perpendicular to the flange along the circular holes. It is constituted by joining each body column and a flange. Conventionally, such a joining method of a plate material and a pipe material (pipe) is shown in FIG.
10 to FIG. First, as shown in FIG. 7, there is a method in which the end surface 3 of the tube 1 is abutted against the plate 2 and welding is performed from the back side of the plate 2 by the YAG laser method. In the method shown in FIG. 8, a hole 4 having the same diameter as the tube 1 is provided in advance in the plate 2, an end 5 of the tube 1 is inserted into the hole 4, and the end 5 is expanded to form the plate 2. And the tube material 1 are mechanically joined. Further, in the method shown in FIG. 9, in the state where a hole 4 having the same diameter as the
Is passed through the hole 4, and the plate 2 is pressed along the periphery of the tube 1 to form a depression 6 around the hollow wire 1 on the surface of the plate 2. The tube material 1 is crimped by shrinking the portion. The method shown in FIG. 10 is a method in which a hollow wire rod 1 is formed by processing a one-round stringing portion 7a in a state where a hole 4 having the same diameter as the pipe member 1 is previously formed in the plate member 2.
Through the hole 4, a stringing portion 7 a with the plate material 2 interposed therebetween.
The plate member 2 and the tube member 1 are joined by processing the stringing processing portion 7b on the opposite side of the above.

[0003]

However, in the butt joining method by welding shown in FIG.
There is no problem if the thickness of the material is large or if both are thin, as long as they are of the same thickness, but if the thickness of both is small and the difference in thickness is large, the amount of material penetration It is difficult to control, and the distortion increases, which is not preferable in terms of product accuracy. Further, there is a disadvantage that the equipment cost is high.

In the joining method shown in FIGS. 8 and 9,
There is a disadvantage that the product accuracy is low and the strength when a force in the pulling direction acts is low.

Further, the method shown in FIG. 10 has a drawback that stringing is extremely difficult and processing cost is high.

The present invention has been made in view of such a problem, and the joining is easy even when the thickness of the plate and the tube is thin and the difference between the thickness of the plate and the tube is large. It is an object of the present invention to provide a tube sheet structure having high joining strength and a method for manufacturing the same.

[0007]

A tube sheet structure according to the present invention comprises a plate having a hole and a tube inserted through the hole, wherein the tube has one surface of the plate through the hole. And a flared portion that contacts the other surface of the plate material at the hole.

[0008] A spacer may be provided between the flared portion and the plate. The plate material may be hemmed at a peripheral portion of the hole, and the hemmed portion may be interposed between the flared portion and the plate material.

According to another aspect of the present invention, there is provided a tube sheet structure having a plate having a hole and a tube inserted through the hole, wherein the tube has a string contacting one surface of the plate at the hole. An outgoing processing portion is formed, and an end portion of the tube material and a hole peripheral portion of the plate material are both curled on the other surface side of the plate material.

[0010] In the method for manufacturing a tube sheet structure according to the present invention, a hole is formed in a plate material, a stringing portion is formed around the tube material, and an end of the tube material is inserted through the hole. By flaring the end portion, the plate member is mechanically joined to the tube material between the stringing portion and the flared portion.

[0011] In another method of manufacturing a tube sheet structure according to the present invention, a hole is formed by burring a plate material, and then a laced tube material is inserted into the hole, and an end of the tube material and the plate material are connected to each other. The plate material is mechanically joined to the tube material between the stringing portion and the curling portion by simultaneously performing the curling process on the burring portion.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 is a sectional view showing a tube sheet structure according to a first embodiment of the present invention. A hole 4 having the same diameter as that of the tube 1 is opened in the plate member 2, and one end of the tube member 1 is processed with a stringing portion 8, and the end of the tube 1 is inserted into the hole 4. After the stringing portion 8 is brought into contact with the lower surface of the plate 2, the end of the tube 1 projecting upward from the upper surface of the plate 2 is flared to form a flared portion 9.
To form The material of the tube 1 and the plate 2 is, for example, a JIS3004 aluminum alloy.

As described above, in this embodiment, the plate member 2 and the tube member 1 are mechanically joined by the stringing portion 8 and the flare portion 9. For this reason, in this embodiment,
The joining accuracy and joining strength are high, and joining is easy even if the difference in wall thickness is large.

Note that the outer diameter d of the stringing section 8 and the pipe 1
Is controlled to 1.2 to 1.6, and the ratio e / of the outer diameter e of the flared portion 9 to the diameter a of the tube 1 is controlled.
It is preferable to control a to 1.2 to 1.6. Thereby, it is possible to obtain a joint having high joining strength without cracking and buckling.

FIG. 2 is a sectional view showing a second embodiment of the present invention. The pipe member 1 is provided with a cording portion 8, and the plate member 2 is provided with holes 4 by burring. Then, the burring portion and the end protruding from the plate material 2 of the tube material 1 are simultaneously curled to form curling portions 10 and 11 on the plate material 2 and the tube material 1 respectively. The tube material 1 and the plate material 2 are mechanically joined by the curling portions 10 and 11 and the stringing portion 8.

This embodiment has the same effect as the embodiment shown in FIG. The ratio f / (b + c) of the outer diameter f of the curled portion 11 to the sum of the thickness c of the vertical wall portion of the hole 4 formed by the burring process and the thickness b of the tube 1 is 6 or less. Is preferred. Thereby, it is possible to obtain a joint having high joining strength without cracking and buckling.

FIG. 3 is a sectional view showing a third embodiment of the present invention. This embodiment differs from the embodiment shown in FIG. 1 in that a spacer 12 made of a ring-shaped metal plate is interposed between the flared portion 9 and the plate material 2. This allows
It is possible to increase the thickness of the joint, eliminate play at the joint, and improve the joint strength.

FIG. 4 is a sectional view showing a fourth embodiment of the present invention. In this embodiment, the plate material 2 is hemmed at the joint portion, and the plate material is folded at the periphery of the hole 4. This hemmed portion 13 can increase the thickness of the joint portion, reduce the play at the joint portion, and improve the joint strength, similarly to the spacer 12 of FIG.

FIG. 5 shows the joint strength between the tube sheet structure of the present embodiment shown in FIGS. 1 and 2 and the conventional tube sheet structure shown in FIGS. As shown in this figure, compared to the conventional welding method (FIG. 7), pipe expansion (FIG. 8), shrinkage of the flange (FIG. 9), and two-stage stringing (FIG. 10), the stringing processing of FIG. In the case of flaring, and in the case of stringing and curling shown in FIG. 2, the joining strength is extremely high.

FIG. 6 is a view showing an embodiment in which the tube sheet structure according to the present invention is applied to a spool for a wire rod. As shown in this figure, the trunk member 21 of the wire rod spool is
In order to fix it, the stringing part 8 and the flare part 9 of the present invention are used.

[0021]

EXAMPLES Table 1 below shows a pipe 1 made of JIS3004-H14 and a plate 2 made of JIS3004-H24.
Is used to show the bonding strength when producing tube sheet structures of various shapes and dimensions. The tube sheet structure was flared in FIG. 1 or curled in FIG. As is clear from Table 1, when d / a falls within the range of 1.2 to 1.6, e / a becomes 1.2 to 1.6.
Or when f / (b + c) is 6 or less, the bonding strength is good. On the other hand, when it was out of these ranges, cracks occurred at the corded portion, the curling end or the flare end.

[0022]

[Table 1]

[0023]

As described above, according to the present invention,
Even when the thickness of the plate material and the pipe material is thin and the difference between the thicknesses is large, joining is easy, and excellent effects such as high product accuracy and high joining strength can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a sectional view showing a third embodiment of the present invention.

FIG. 4 is a sectional view showing a fourth embodiment of the present invention.

FIG. 5 is a graph showing the effect of the present invention.

FIG. 6 is a view showing an embodiment in which the tube sheet structure according to the present invention is applied to a spool for a wire rod, (a) is a plan view thereof,
(B) is a sectional view.

FIG. 7 is a sectional view showing a conventional tube sheet structure.

FIG. 8 is a sectional view showing a conventional tube sheet structure.

FIG. 9 is a cross-sectional view showing a conventional tube sheet structure.

FIG. 10 is a sectional view showing a conventional tube sheet structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1; Tube material 2; Plate material 3; End face 4; Hole 7a, 7b, 8; Stringing processing part 9;

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuya Hattori 15 Kinuigaoka, Moka-shi, Tochigi Pref. Inside Kobe Steel Moka Works (72) Inventor Shoichi Ninomiya 1-8-2 Marunouchi, Chiyoda-ku, Tokyo No. Kobe Steel, Ltd.Tokyo headquarters (72) Inventor Hideyuki Ohno 1-8-2 Marunouchi, Chiyoda-ku, Tokyo, Japan Co., Ltd.Kobe Steel Ltd.Tokyo headquarters (72) Inventor Shinji Komatsu Miyama, Fujisawa-shi, Kanagawa 100-1 Urakawachi Kobe Steel Fujisawa Plant (72) Inventor Kenji 2-19 Higashi Unobe-cho, Ibaraki-shi, Osaka Prefecture Kobe Steel Ibaraki Plant (72) Inventor Junji Matsuo Ikeda, Osaka 1-176, Teshima-minami-shi, Yokohama

Claims (6)

[Claims] 1. A plate material having a hole, and a tube material inserted into the hole, wherein the tube material has a stringing processing portion that contacts one surface of the plate material with the hole, A tube sheet structure, wherein a flare-processed portion that contacts the other surface of the sheet material is formed. 2. A plate material having a hole, and a tube material inserted into the hole, wherein the tube material is provided with a stringing portion that contacts one surface of the plate material at the hole. A tube sheet structure, wherein both an end portion of a tube material and a peripheral edge of a hole of the plate material are curled on the other surface side of the plate material. 3. The tube sheet structure according to claim 1, wherein a spacer is provided between the flared portion and the plate material. 4. The plate material according to claim 1, wherein a peripheral portion of the hole is hemmed, and the hemmed portion is interposed between the flared portion and the plate material.
4. The tube sheet structure according to item 1. 5. A hole is formed in a plate material, a wrapping portion is formed around the tube material, and an end portion of the tube material is inserted into the hole, and the end portion is flared. A method for manufacturing a tube sheet structure, wherein a plate material is mechanically joined to the tube material between the stringing portion and the flare portion. 6. After a hole is formed by burring a plate material, a laid-out tube material is inserted into the hole, and an end portion of the tube material and a burring portion of the plate material are curled at the same time. A method of manufacturing a tube sheet structure, wherein a plate material is mechanically joined to the tube material between the stringing processing section and the curling processing section.