JP3076241B2 - Flanged pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flanged pipe in which a sheet metal part is fixed and a flange is provided at an end of the pipe.

[0002]

2. Description of the Related Art There are various types of flanged pipes, some of which have very complicated shapes. For example, a drain oil pipe for returning engine oil supplied to an automobile engine from an exhaust manifold side to an oil pan has a bellows 2 formed in a central portion of an oil pipe 1 as shown in FIGS. Since the bent portions 3 and 4 are formed at the intermediate portion between the forming portion 1a and both ends 1b and 1c so that both ends match predetermined positions of the engine, the pipe shape itself has a complicated shape. In addition, one of the flange portions 5 and 6 joined to each end of the oil pipe 1 has a curved tubular shape to be connected to the side surface of the oil pan instead of a normal flat flange. Oil pan connection surface 6
Since the end 1c of the oil pipe 1 is joined to the side surface 6b perpendicular to a with the pipe axis perpendicular to the side surface 6b, the flange 6 also has a complicated shape.

[0003] In order to manufacture this drain oil pipe, an oil pipe 1 having a bellows portion formed at the center is used.
And a flange 5 formed by machining a flat plate and a flange 6 formed into a predetermined shape by casting are manufactured separately, and each flange 5, 6 is brazed to each end of the oil pipe 1. It is manufactured by an integrated method.

Of the components constituting the drain oil pipe, the flange 6 is a casting, so that the manufacturing process is complicated and the number of man-hours is increased. However, in the case of low-volume production of many kinds, the cost is high, and the thickness is thicker than that of the oil pipe 1, which not only causes an increase in weight but also reduces the temperature of each part during brazing. Not constant
This also causes the temperature distribution to be non-uniform, which may cause poor brazing. As described above, when the drain oil pipe is manufactured, various problems occur because the flange 6 is a casting.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such problems in the prior art,
An object of solving the above problems and achieving the object of the present invention is to make a flange having a curved pipe shape a sheet metal combination structure, thereby making it thinner and lighter, and making it easier to join with a pipe. To provide a flanged pipe.

[0006]

Means for Solving the Problems Claim 1 of the present invention
The pipe with a flange according to the present invention has a substrate in which a through hole serving as a fluid passage is formed in a substantially central portion, and a flat portion formed on an outer peripheral side surface of one end portion having an open end, and the flat portion is formed on one surface of the substrate. A pipe which is attached by contact and has the opening end near the edge of the through hole, and covers a periphery of the opening end of the pipe and a periphery of the through hole of the substrate, and It is characterized by being combined with a cover plate formed by molding a plate material forming a flow path between the hole and the hole.

According to a second aspect of the present invention, there is provided a pipe with a flange, wherein the shape of the end of the pipe is linear with the straight portion forming the flat portion, and rises linearly from both ends of the straight portion in the vertical direction with substantially the same width. It is characterized in that it is formed in a cross-sectional shape comprising two straight portions and an arc portion connecting the ends of the two straight portions by drawing an arc.

According to a third aspect of the present invention, there is provided a pipe with a flange, wherein the shape of the end of the pipe is a straight portion forming the flat portion, and two straight portions rising straight from both ends of the straight portion in a direction of widening each other. It is characterized in that it is formed in a cross-sectional shape comprising a straight portion and a circular arc portion connecting the ends of the two straight portions by drawing an arc.

According to a fourth aspect of the present invention, there is provided a pipe with a flange according to any one of the first to third aspects, wherein the abutting portions of the substrate, the pipe and the cover plate are brought into low contact with each other and integrally fixed. It is characterized by having done.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following embodiments of the present invention, a description will be given of a case where a cross-sectional shape of a pipe fitting portion is formed as a combination of a semicircle and a rectangle. However, this embodiment is specifically illustrated and described in order to better understand the gist of the present invention, and thus does not limit the present invention unless otherwise specified.

[Structure] FIGS. 1 to 3 are sectional views of a flanged pipe viewed from the front, side, and plane. The pipe flange 11 includes a substrate 12 and a cover plate 13 and is formed so that an end of the pipe 14 can be fitted and fixed.

The substrate 12 is a thick plate-shaped member, and has two surfaces, such as an upper surface and a lower surface of the plate material, which are positioned on the front and the back.
Joint surface 21 for soldering and connection surface 2 to the mating part
2 are formed in a parallel plane, a through hole 23 is formed in the center of the plate between the joint surface 21 and the connection surface 22 in the thickness direction, and a plurality of bolt holes 24, 24 are formed by drilling.

The cover plate 13 is a thin plate-like shell structure member, forms a flat portion 31 that contacts the joint surface side of the substrate 12, and fits the pipe 14 in a direction substantially perpendicular to the through hole 23. The pipe fitting portion 32 is formed, and a curved flow path 33 extending from the pipe fitting portion 32 to the through hole 23 is formed to form a shell structure portion 34 that covers the periphery of the through hole 23.

The pipe 14 to be fitted is plastically deformed until a part of its end becomes a flat surface 14a, and the cross-sectional shape when the flat surface is turned downward has a semicircular upper portion and a lower portion having substantially the same width. It is formed into a rectangular shape. To describe this shape in detail, the cross-sectional shape at the end having the plane 14a of the pipe 14 is a rectangular lower part composed of a horizontal straight part forming the plane 14a and two straight parts rising with a uniform width from both ends thereof. It is formed in a shape consisting of a half portion and an arc-shaped upper half portion connecting the tips of two straight portions with an arc.

The cross-sectional shape of the pipe fitting portion 32 of the pipe flange is formed to be similar to the cross-sectional shape of the end of the pipe 14 having the flat surface 14a.
In order to allow the brazing material to flow into the pipe fitting portion 32 when the brazing material is in contact with the brazing material, at least a gap necessary for the brazing material to flow into the brazing material is provided between the two.

Such a pipe flange is provided on the substrate 12.
Is formed by machining, and the cover plate 13 is formed by pressing. The board 12 is formed by cutting or pressing a thick plate into a flat plate material as shown in FIG. 3, and using one surface of the plate material as a connection surface and the other surface having a front-back relationship as a bonding surface. Therefore, the two surfaces are cut into a smooth parallel plane, or are formed at the same time when the plane shape is pressed. The through hole 23 is formed in the center of the substrate.
In the periphery thereof, bolt holes 24, 24 are formed by drilling.

The covering plate 13 has a plane portion forming a flange of the covering plate 13 so as to have a complex shell shape in which a flat surface and a curved surface are combined as shown in FIGS. A connecting surface 31a on the substrate connecting side of the base 31; a curved surface along the outer shape of the pipe on the pipe fitting side of the pipe fitting portion 32; a curved flow path 33 connecting the flat surface for the low connection and the curved surface; Is formed by press working using a mold that has been formed in advance, and the shell structure portion 34 is formed.

As the pipe 14, there is used a processing jig whose cross-sectional shape as shown in FIGS. 1 and 2 is formed by combining a semicircle and a rectangle, or a mold in which an outer die and a core are combined. ,
One end having a circular cross section is plastically deformed and formed by a pressing machine operated by a press machine or a hydraulic cylinder or the like.

The pipe 11 with the flange is manufactured by assembling the pipe flange 11 and the pipe 14 thus formed and bringing each joint surface into low contact. First, the covering plate 13 formed on the joint surface 21 of the formed substrate 12 is formed.
Is fixed (by setting the brazing material in necessary places in the case of the brazing in the case where the brazing material is set in advance), and the pipe fitting portion 32 of the covering plate 13 is fixed. Then, the deformed end 14a of the pipe 14 is fitted to the pipe 14 to prepare for the brazing.

After completion of the preparation work, each joint is heated to a brazing temperature, and the supplied bar-shaped brazing material or, if the brazing material has been previously installed, is melted to lower the joining surface. Touch After brazing, the surface of the brazing part is finished finely to complete the flanged pipe.

[Effects] In the embodiment constructed as described above, each of the substrate 12 and the cover plate 13 is made of a plate material and can be formed by a simple process, so that the overall thickness can be reduced without lowering the strength. As a result, the weight of the flange portion is reduced by about 50% and the cost is reduced by 30 to 40% as compared with the conventional parts.

Further, since the pipe fitting portion 32 for fitting the end having the flat surface 14a of the pipe 14 is formed in a thin and similar shape, heating at the time of brazing can be performed quickly and uniformly. The brazing time can be shortened and the brazing can be performed easily and reliably, and the bonding cost can be reduced.

Further, since the end having the flat surface 14a of the pipe 14 and the pipe fitting portion 32 for fitting the end are formed in a shape similar to the cross-sectional shape of the tunnel, positioning at the time of fitting is performed. And the gap between the two is prevented from becoming unnecessarily large, the brazing material is not used unnecessarily in large amounts, and the brazing cost can be reduced.

[Alternative Embodiment] This embodiment is specifically described for better understanding of the present invention, and does not limit the alternative embodiment. Therefore, changes can be made without departing from the spirit of the invention. For example, as shown in FIG. 4, the pipe cross section is changed, and as shown in FIG. 4, an inverted trapezoidal shape including a straight portion forming a flat portion, and two straight portions rising straight from both ends of the straight portion in a direction in which the width is increased. It is also possible to use a pipe 41 having an arc-shaped upper half formed by a lower half and an arc connecting the ends of the two straight portions in an arc. In this case, the covering portion 42 has a low contact flat surface 43a on the substrate joining side of the flat portion 43 forming the flange of the covering portion 42 so as to have a complicated shell shape in which the flat surface and the curved surface are combined, and a pipe. 41 has a pipe fitting portion 44 formed in a shape similar to the cross-sectional shape of the deformed end portion, and a curved flow path extending from the pipe fitting portion 44 to the through hole 23 to cover the periphery of the through hole 23. Shell structure (not shown)
May be formed. In this case, the pipe 41 is closer to a round pipe, which facilitates plastic working at the time of manufacturing, and the pipe 41 and the pipe fitting portion 44 of the covering portion 42 are less likely to come off during assembly, thereby improving workability. be able to.

The length of the plane portion of the cover plate 42 is shown in FIG.
As shown in FIG.
6 and 46 may be perforated and arranged so as to overlap the bolt holes 24 and 24 of the substrate 12. In this case, not only the appearance of the structure is improved, but also the pipe 4
1 and the flat portion 45 serve as a strength reinforcing member in the thickness direction of the substrate 12, and the brazing range is widened, so that the rigidity against the load applied to the substrate 12 can be increased. Also,
This flat portion may be formed longer in the case of the cover plate 13.

[0026]

As described above, in the flanged pipe according to the first aspect of the present invention, the substrate and the cover plate can each be formed from a plate material, and in particular, the cover plate can be formed thin to reduce the weight. At the same time, the manufacturing process of the flanged pipe can be simplified, and the cost can be reduced.

Further, in the pipe with the flange according to the second aspect, the formability of the pipe and the cover plate is improved, the manufacturing process can be simplified, and the productivity can be increased.

In the pipe with the flange according to the third aspect, the amount of deformation of the pipe can be reduced, and the pipe and the cover plate hardly come off during processing, so that workability can be improved. It is possible to prevent a decrease in strength of the thin pipe later.

Further, in the pipe with flange according to the fourth aspect, the assembled flange made of a plate material can be air-tightly joined to the pipe, and the manufacture of the pipe having the thin and lightweight flange fixed thereto becomes easy, and the weight is reduced. A flanged pipe can be realized, and the cost of the flanged pipe can be reduced.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing an embodiment according to the present invention.

FIG. 2 is a side sectional view showing an embodiment according to the present invention.

FIG. 3 is a partial plan sectional view showing an embodiment according to the present invention.

FIG. 4 is a front sectional view showing another mode of the embodiment according to the present invention.

FIG. 5 is a front sectional view showing another different mode of the embodiment according to the present invention.

FIG. 6 is a side view showing a conventional flanged pipe.

FIG. 7 is a plan view showing the vicinity of a flange portion of a conventional flanged pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Pipe flange 12 Substrate 13 Covering plate 14 Pipe 14a Plane (at pipe end) 21 Joint surface 22 Connection surface 23 Through hole 24 Bolt hole 31 Flat portion 31a Low contact flat surface (joining flat surface) 32 Pipe fitting portion ( Curved surface) 33 Bent channel 34 Shell structure

────────────────────────────────────────────────── ─── Continued on the front page (72) Kunihiko Hayashi Inventor Ezaki Kogyo Co., Ltd. 2-38-9 Minami-rokugo, Ota-ku, Tokyo (56) References Real Opening 2-33123 (JP, U) Real Opening 61-123291 (JP, U) Jiko 56-39837 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 23/00-23/24 F16L 43/00-43 / 02 F16L 9/00-9/22

Claims (4)

(57) [Claims] A flat plate is formed at a substantially central portion of a substrate provided with a through-hole serving as a fluid passage, and a flat portion is formed on an outer peripheral side surface of one end having an open end, and the flat portion is brought into surface contact with one surface of the substrate. Attached
A pipe disposed the open end near the edge of the through hole as well as the penetrating the <br/> through Anashu sides of the substrate and the open end peripheral portion of the pipe and the Utotomoni said open end set a covering plate formed by molding sheet for forming a flow path between the bore
A flanged pipe characterized by being combined . 2. The shape of the end of the pipe is a straight portion forming the flat portion, two straight portions rising straight from both ends of the straight portion in the vertical direction with substantially the same width, and The pipe with a flange according to claim 1, wherein the pipe has a cross-sectional shape including an arc portion connecting an end of the straight portion by drawing an arc. 3. The shape of the end of the pipe is a straight portion forming the flat portion, and two straight portions rising straight from both ends of the straight portion in the direction of increasing the width.
The pipe with a flange according to claim 1, wherein the cross-sectional shape is formed by an arc portion connecting ends of the two straight portions by drawing an arc. 4. A flanged pipe according to claim 1, wherein said abutting portions of said base plate, said pipe and said covering plate are fixedly joined together by brazing. pipe.