JPH0252167A - Method for brazing metallic material - Google Patents

Abstract

PURPOSE:To braze both metallic materials after tack-welding both metallic materials and brazing filler metal by bending a plug end of cylindrical metallic material inward in the radial direction and providing a flange projecting outward on an end and forming a brazing filler metal fitting groove and a flange fitting groove on the inner peripheral surface of a hole of the other metallic material. CONSTITUTION:The flange 11 projecting outward on the opening end of the cylindrical metallic material 1 is formed integrally and a bend 12 is formed in the radial direction extending over the prescribed length from the opening end. In addition, the annular brazing filler metal fitting groove 13 and the flange fitting groove 14 are formed extending over the overall periphery so that the former comes to the inlet side where the cylindrical metallic material 1 is inserted on the inner peripheral surface of the through hole 7 of the other metallic material 4 and the annular brazing filler metal 15 is fitted into the filler metal fitting groove 13 and then, one end of the cylindrical metallic material 1 is inserted into the hole 7. The inward bend 12 of the cylindrical metallic material 1 is then expanded and the flange 11 is fitted into the flange fitting groove 14. Afterward, an annular groove 16 having a V-shaped cross section is subjected to press working around the brazing filler metal fitting groove 13 to prevent the brazing filler metal from coming out. The cylindrical metallic material 1, the other metallic material 4 and the brazing filler metal 15 are tack-welded and both metallic materials 1 and 4 are brazed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention provides a method for connecting a cylindrical metal material and another metal material having a hole into which one end of the cylindrical metal material is inserted. This relates to a method of brazing both metal materials with the part inserted into the hole of the other metal material.

In this specification, the term "aluminum" includes aluminum alloys in addition to pure aluminum.

Conventional technology A cylindrical metal material and another metal material having a hole into which one end of the cylindrical metal material is inserted are inserted, and one end of the cylindrical metal material is inserted into the hole of the other metal material. Conventionally, when brazing two metal materials together, the end of the cylindrical metal material is inserted into the hole of the other metal material, and then a ring-shaped brazing filler metal is fitted onto the cylindrical metal material to cover it. Both metal materials and the brazing material were fixed with a jig and temporarily assembled, and then both metal materials were brazed.

Problems to be Solved by the Invention However, in the conventional method, the temporary assembly was performed manually, so there was a problem that the quality of the brazed state was not stable. Furthermore, in the case of furnace brazing, for example, the jig is also placed in the furnace and heated, which requires extra heat, leading to energy loss. In addition, since the temporary assembly fixed by the jig becomes large, the number of pieces to be put into the furnace must be reduced, which reduces the number of pieces that can be brazed at a time, resulting in poor work efficiency. Furthermore, since the jig deteriorates when exposed to high temperatures, it is necessary to replace it periodically, which raises the problem of high costs.

An object of the present invention is to provide a method for brazing metal materials that solves the above problems.

Means for Solving the Problems One method of brazing metal materials according to the present invention is to connect a cylindrical metal material and another metal material having a hole into which one end of the cylindrical metal material is inserted into a cylindrical shape. When brazing both metal materials with one end of the metal material inserted into the hole of the other metal material, the insertion end of the cylindrical metal material is bent radially inward over a predetermined length. A ring-shaped filler metal fitting groove and a flange fitting groove are formed on the inner peripheral surface of the hole of the other metal material, and the former is provided with an outwardly protruding flange at the end of the metal material. After fitting the ring-shaped brazing filler metal into the filler metal fitting groove, insert one end of the cylindrical metal material into the hole, and then insert the ring-shaped filler metal into the hole. This method is characterized in that the inwardly bent portion of the metal material is expanded, the flange is fitted into the flange fitting groove, and both metal materials are brazed in this state.

Another method of brazing metal materials according to the present invention is to connect a cylindrical metal material and another metal material having a white hole into which one end of the cylindrical metal material is inserted. When brazing both metal materials with one end inserted into the hole of the other metal material,
An annular filler metal fitting groove and a protrusion fitting groove are formed on the inner circumferential surface of the hole of the other metal material, so that the former is located on the entrance side into which the cylindrical metal material is inserted, over the entire circumference. Then, after fitting the ring-shaped brazing material into the brazing material fitting groove, one end of the cylindrical metal material is inserted into the hole, and then an outward protrusion is formed in the shape of an overhang on the peripheral wall of the cylindrical metal material. This protrusion is then forcibly fitted into the annular groove, and both metal materials are brazed in this state.

In the above, the outward protrusion may be a plurality of protrusions spaced at predetermined intervals in the circumferential direction, or may be an annular protrusion.

Function: With either of the above two methods, both metal parts and the brazing material can be temporarily fixed without using a jig, and both metal materials can be brazed in this state.

Example Embodiments of the invention will be described below with reference to the drawings.

In the following example, the method of the present invention is applied to the manufacture of an automobile intake manifold. In addition, in the following description, substantially the same items and parts will be denoted by the same reference numerals, and the description will be omitted.

First, an automobile intake manifold will be explained with reference to FIG. The intake manifold is open at one end and closed at the other end, has a plurality of holes formed in its peripheral wall, and has a cylindrical outward protrusion (2) for connecting a branch pipe around the holes.
A main pipe (1) made of aluminum wrought material integrally provided with a cylindrical outward protrusion (2) at one end for connecting a branch pipe.
A plurality of branch pipes (3) made of aluminum wrought material are connected in a fitted state to the pipes.

A throttle body mounting body (4) made of an aluminum casting is fixed to the open end of the main pipe (1). A throttle body (not shown) is attached to the body (4), and an air supply pipe from the air cleaner + is connected to this.

The other end of each branch pipe (3) is connected to a flange (5) for attachment to one aluminum casting cylinder head. For installation, each branch pipe (3) is connected to a cylinder head of an engine (not shown) via a flange ('5).

The main pipe (1) is made from a wrought aluminum material, such as an impact extrusion vibrator or an extrusion vibrator. The closing wall at the other end of the main pipe (1) has an outwardly projecting hemispherical shape, and its inner surface is a four-spherical surface. This can be expected to have a silencing effect. The inner diameter of the cylindrical outward protrusion (2) for connecting the branch pipe is the same as that of the branch pipe (3).
) is the same as the inner diameter of

The branch pipe (3) is made from wrought aluminum, for example an extruded vibrator. One end of the branch pipe (3) to be connected to the main pipe (1) is fitted into the tip of the branch pipe connecting cylindrical outward protrusion (2) so that their axes coincide with each other so that the protrusion ( 2) is brazed.

As the main pipe (1) and branch pipe (3), for example, J
J l like l5A6063, J I 5A6061
It is preferable to use a material made of 5A6000 series aluminum material.

The throttle body mounting body (4) has a cylindrical shape, and an outwardly projecting flange (6) is integrally provided at one end thereof. Also, when installing the throttle body, the body (4) is the main pipe (1).
) is provided with a through hole (7) into which the open end of the hole (7) is inserted. One open end of the main pipe (1) is inserted into the through hole (7) from the end of the body (4) on which the flange (6) is not provided, and the throttle body is attached to the body. (4) is brazed.

For attachment to the cylinder head, the flange (5) is made of either a wrought aluminum material or a cast aluminum product. For attachment, the flange (5) is horizontally elongated and has four holes and a cylindrical protrusion (8) for connecting a branch pipe that is integrally provided around the holes. In addition, the fuel injection device insertion part (9) is installed above the 6 holes of the flange (5).
- Physically provided. And the branch pipe (3) is
It is inserted into the tip of the protrusion (8) and brazed.

In the following embodiments, the method of the present invention is applied to the connection between the main pipe (1) and the throttle body mounting body (4).

Example 1 This example is shown in FIGS. 1 and 2. In the following description, left and right refer to the left and right of each drawing.

In FIGS. 1 and 2, an outwardly protruding flange (11) is integrally formed at the open end of the main pipe (1), and is bent radially inward over a predetermined length from the open end. put. This inward bend is indicated by (12). In addition, the throttle body is installed by forming an annular brazing material fitting groove (13) and a flange fitting groove (14) on the inner peripheral surface of the through hole (7) of the body (4) so that the former is on the right side. Form it all around. The brazing material fitting groove (13) is also open on the right side of the throttle body mounting body (4).

Then, the ring-shaped brazing material (1
5), insert the open end of the main pipe (1) into the hole (7).
(See Figure 1). Next, the inwardly bent portion (12) of the main pipe (1) is expanded and the flange (11) is fitted into the flange fitting groove (14). After that, the throttle body is installed by pressing so that an annular groove (16) with a V-shaped cross section is formed around the entire circumference of the part around the brazing material fitting groove (H) on the right side of the body (4). and grooves (1
The part surrounded by G) is deformed to prevent the brazing filler metal (■5) from coming off (see Figure 2). In this way, the main pipe (1), the throttle body mounting body (4), and the brazing material (15) are temporarily joined together, and in this state, the main pipe (1) and the throttle body mounting body (4) are brazed together.

Example 2 This embodiment is shown in FIG.

In Fig. 3, the brazing material fitting groove (17) is connected to the through hole (7).
) Form it at a position slightly to the left of the right end. By doing this, as in the case of Example 1, the brazing material (15
) There is no need to perform indentation to prevent the part from coming off. The rest is the same as in Example 1 above.

Example 3 This embodiment is shown in FIG.

In FIG. 4, the left end of the main pipe (1) has a tapered shape whose diameter gradually decreases toward the left, and an outwardly protruding flange (11) is formed at its tip. Taber part (1
8). Further, a predetermined length portion from the left end of the tapered portion (18) is further bent inward to form an inwardly bent portion (12).
) (see the chain line in Figure 4). In addition, the throttle body is installed through the main pipe (1) of the body (4) through the insertion hole (
The predetermined length portion of the right end portion in 7) is tapered to gradually increase in diameter toward the right. This taper portion is indicated by (19). The throttle body is installed by inserting an annular solder fitting 11η (13) and a flange fitting groove (14) over the entire circumference on the inner peripheral surface of the tapered portion (19) in the through hole (7) of the body (4). Form it. Next, a ring-shaped brazing material (15) is inserted into the brazing material fitting groove (13).
After fitting, the open end of the main pipe (1) is inserted into the hole (7). Thereafter, the inwardly bent portion (12) of the main pipe (1) is expanded and the flange (11) is fitted into the flange fitting groove (14). At this time, the presence of the tapered portions of the main pipe (1) and the through hole (7) prevents the brazing material (15) from coming off (see the solid line in FIG. 4). In this way, the main pipe (1) and the throttle body mounting body (4) are temporarily fastened to the solder +4 (15), and in this state, the main pipe (1) and the throttle body mounting body (4) are brazed.

Example 4 This embodiment is shown in FIGS. 5 and 6.

5 and 6, the throttle body is installed by forming an annular brazing material fitting groove (13) and a protrusion fitting groove (20) on the inner peripheral surface of the through hole (7) of the body (4). Form it all around so that the former is on the right side. And the wax phase fit? Ring-shaped brazing filler metal (15) inside 16 (13)
), then insert the open end of the main pipe (1) into the hole (7) (see Figure 5). Next, a portion of the peripheral wall of the main pipe (1) corresponding to the protrusion fitting groove (20) is bulged outward, and the protrusions (21) bulging outward are placed at predetermined intervals in the circumferential direction. A plurality of protrusions are formed, and these protrusions (21) are forcibly fitted into the protrusion fitting groove (20). After that, as in the case of Embodiment 1, the throttle body is installed in the brazing material fitting groove (13) on the right side of the body (4).
) is indented so that an annular groove (IG) with a V-shaped cross section is formed over the entire circumference, and the area surrounded by the groove (lG) is deformed to form the brazing filler metal (15). (See Figure 6). Thus, the master (1)
Temporarily fasten the throttle body mounting body (4) and brazing material (15), and in this state, braze the main pipe (1) and the throttle body mounting body (4).

Example 5 This embodiment is shown in FIG.

In FIG. 7, a tapered portion (18) whose diameter gradually decreases toward the left is formed at the left end of the main pipe (1). Also, the throttle body is installed through the through hole of the body (4) (
A tapered portion (19) whose diameter gradually increases toward the right is formed at a predetermined length portion of the right end portion in 7). The throttle body is installed through the through hole of the body (4) (
An annular brazing material fitting groove (13) and a protrusion fitting groove (20) are formed on the inner peripheral surface of the tapered portion (19) in 7) over the entire circumference. Next, filler metal fitting groove (13)
After fitting the ring-shaped brazing filler metal (15) into the main pipe (1
) into the hole (7). After that, the main manager (1
), a portion of the peripheral wall corresponding to the protrusion fitting groove (20) is processed to protrude outward, and a plurality of protrusions (21) protruding outward are formed at predetermined intervals in the circumferential direction;
These protrusions (21) are forcibly fitted into the protrusion fitting grooves (20). At this time, the main pipe (1) and the through hole (7
) The presence of the taper portion prevents the brazing filler metal (15) from coming off (see Fig. 7). In this way, the main pipe (1), the throttle body mounting body (4), and the brazing material (15) are temporarily joined together, and in this state, the main pipe (1) and the throttle body mounting body (4) are brazed together.

Effects of the Invention According to the method of the present invention, as described above, both metal materials and the brazing material can be temporarily bonded without using a jig, and both metal materials can be brazed in this state. Can be done. Therefore, the various problems mentioned above due to the use of jigs can be solved, the quality of the brazed state is stabilized, and even when brazing in a furnace, for example, no extra heat is required and energy loss is reduced. It disappears. In addition, the number of pieces that can be brazed in the furnace increases at one time, improving work efficiency. Furthermore, there is no need for jig costs.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 show a first embodiment of the present invention.
The figure is an enlarged vertical cross-sectional view of the main pipe and throttle body installed with the body inserted into the hole in the body, and Figure 2 is an enlarged vertical cross-sectional view of the main pipe and throttle body installed with the body and brazing material temporarily attached.
Fig. 3 shows a second embodiment of the present invention, in which the main pipe and the throttle body are attached in an enlarged vertical cross-sectional view with the body and the brazing material temporarily fixed together; Fig. 4 shows a third embodiment of the invention; Embodiment 4 of the present invention is shown in FIGS. 5 and 6, which are enlarged vertical cross-sectional views of the throttle body installed with the body and brazing material temporarily attached.
Figure 5 is an enlarged vertical sectional view of the main pipe inserted into the hole in the throttle body body, and Figure 6 is an enlarged longitudinal cross-sectional view of the main pipe and throttle body installed with the body and brazing material temporarily secured. Embodiment 5 of the present invention is shown in an enlarged longitudinal sectional view, FIG. 7, and an enlarged longitudinal sectional view in which the main pipe and throttle body are temporarily attached to the body and the brazing material, and FIG. The throttle body is a perspective view of the intake manifold joined to the throttle body. (1) Main pipe (cylindrical metal material), (4) Throttle body mounting body (other metal material), (7)...
Through hole, (11)... outwardly protruding flange, (I2)...
・・Inward bent portion, (13) (17) ・Brazing metal fitting groove, (14) ・・Flange fitting groove, (I5) ・・Ring-shaped brazing metal, (20) ・・・Projection fitting groove, (21)・
...Protrusion (outward protrusion). Figure 1 Figure 2 Figure 8 Figure 4 Figure 5 Figure 21' 6-

Claims (2)

[Claims] (1) A cylindrical metal material and another metal material having a hole into which one end of the cylindrical metal material is inserted, and one end of the cylindrical metal material is inserted into the hole of the other metal material. In order to braze both metal materials in this state, the insertion end of the cylindrical metal material is bent radially inward over a predetermined length, and an outwardly protruding flange is provided at the end. An annular brazing material fitting groove and a flange fitting groove are formed on the inner circumferential surface of the hole in the metal material so that the former is located on the entrance side into which the cylindrical metal material is inserted, over the entire circumference, After fitting the ring-shaped brazing material into the filler metal fitting groove, insert one end of the cylindrical metal material into the hole, then expand the inwardly bent part of the cylindrical metal material and fit the flange into the flange. A method for brazing metal materials, which is characterized by fitting the metal materials into a groove and brazing both metal materials in this state. (2) A cylindrical metal material and another metal material having a hole into which one end of the cylindrical metal material is inserted, and one end of the cylindrical metal material is inserted into the hole of the other metal material. When brazing both metal materials in this state, an annular brazing material fitting groove and a protrusion fitting groove are formed on the inner peripheral surface of the hole in the other metal material, and the former serves as an entrance into which the cylindrical metal material is inserted. After fitting the ring-shaped brazing filler metal into the filler metal fitting groove, insert one end of the cylindrical metal material into the hole, and then insert the ring-shaped filler metal into the hole. A method for brazing metal materials, characterized in that an outward protrusion is formed in a projecting shape on a peripheral wall, the protrusion is forcibly fitted into the groove, and both metal materials are brazed in this state.