JPH0733455U - Let's put - Google Patents

Abstract

(57) [Abstract] [Purpose] A good fillet is formed in the brazing part between two metal materials to prevent defective brazing. [Structure] A brazing braze used for brazing of a metal pipe and a metal part by a brazing system. It consists of a short tube-shaped brazing main body 1 and a supplementary portion 2 which is integrally formed so as to be continuous with the portion of the brazing main body 1 which is above the planned joining portion of the metal pipe and the metal component during brazing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a brazing filler metal used for brazing two metallic materials by a brazing brazing method.

[0002]

[Prior Art and Problems to be Solved by the Invention]

 For example, a metal pipe (30) having a horizontal tubular end (30a) as shown in FIG. 10 and a horizontal hole (31a) into which the horizontal tubular end (30a) of the metal pipe (30) can be inserted. Brazing by the placement brazing method with the metal part (31) having () has been conventionally performed as follows. That is, the large diameter part for brazing (32) is formed through the step at the opening side end of the hole (31a) of the metal part (31), and the horizontal tubular end of the metal pipe (30) is formed. Place a short tubular braze (33) around the part (30a), and insert the horizontal tubular end (30a) of the metal tube (30) into the hole (31a), and then place the short tubular braze. (33) is inserted into the large diameter part (32) so that one end projects outward, and flux is applied in this state and brazed by heating in an appropriate atmosphere in a furnace. Was there.

However, when the metal pipe (30) and the metal component (31) are brazed by such a method, the metal pipe (30) and the metal component (31) are melted when the brazing filler metal (33) is melted. ), The molten brazing filler metal in the circumferential portion including the uppermost portion over a predetermined length flows down due to gravity, and a defective portion (34) is generated as shown in Fig. 11. After the molten filter material has re-solidified, the outer peripheral surface of the horizontal tubular end (30a) of the metal pipe (30) and the inner peripheral surface of the large diameter part (32) for brazing of the metal part (31) There is a problem in that the upper part of the fillet existing between the gaps becomes small and sufficient brazing strength cannot be obtained.

Therefore, in order to solve such a problem, before heating in a furnace, the metal tube (30) and the metal part (31) are circumferentially connected to each other including the uppermost part of the planned joining portion. Set a partially cylindrical supplementary brazing filler metal on the part of the short tubular brazing filler metal (33) that protrudes outward from the large diameter part (32) over the specified length in the furnace in this state. Brazing is performed by heating.

According to this method, even if the above-mentioned defective portion occurs during melting of the short tubular brazing filler metal, the molten brazing filler metal obtained by melting the compensation brazing filler metal is It is prevented that the upper part of the fillet existing between the outer peripheral surface of the horizontal tubular end of the metal tube and the inner peripheral surface of the large diameter portion for brazing metal of the metal part becomes small as a result of flowing into the defective part. It

However, it has been found that this method also has the following problems. That is, the work of setting the replacement brazing filler is troublesome. In addition, when the combination of the metal pipe and the metal parts after the set of the filling brazing filler metal is carried into the furnace, the position of the filling brazing filler metal may be displaced during heating in the furnace. In this case, even if the above-mentioned defective portion occurs, the brazing filler metal in a molten state obtained by melting the filler metal for filling will not flow into this. As a result, the upper portion of the fillet existing between the outer peripheral surface of the metal tube and the inner peripheral surface of the large diameter reservoir portion also becomes small.

An object of the present invention is to provide a placement wax that solves the above problems.

[0008]

[Means for Solving the Problems]

 The brazing filler metal according to the present invention is a brazing filler metal used for brazing of two metal brazing methods, and a brazing metal body having a predetermined shape and a two brazing metal material to be joined when brazing the brazing metal body. It consists of a supplementary part that is formed integrally with the part that comes above the part.

In the above, for example, the brazing alloy according to the present invention is used for aluminum (including aluminum alloy; the same applies hereinafter) wrought materials, aluminum cast materials, and brazing aluminum wrought material and aluminum cast material. In this case, the main body of the brazing filler metal and the filling portion are integrally formed from an Al—Si based brazing material, a Zn—Si based brazing material, or a material containing a flux.

[0010]

[Action]

 It consists of a brazing body with a predetermined shape and a supplementary part that is formed integrally with the part of the brazing body that comes above the part to be joined of the two metal materials when brazing. When the combination of three metal materials is loaded into the furnace, the supplementary part does not move out of position with respect to the brazing body during heating in the furnace.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment of the present invention. In FIG. 1, the brazing filler metal is used for brazing the metal pipe (30) and the metal component (31) shown in FIG. 10, and comprises a short tubular brazing filler metal body (1) and a brazing filler metal body ( It is composed of a partially cylindrical supplemental portion (2) that is integrally formed so as to project outward in the axial direction and is connected to one end side of the outer peripheral surface in the upper part of (1). The circumferential length of the filling portion (2) can be changed appropriately.

Brazing of the metal pipe (30) and the metal component (31) using such a brazing filler metal is performed as shown in FIG. That is, first, put the brazing body (1) around the metal tube (30) and cover it, and insert the horizontal tubular end (30a) of the metal tube (30) into the hole (31a) of the metal part (31). . Then, determine the position of the brazing wire so that the supplemented part (2) will be above the planned joining part during brazing, and place the brazing metal body (1) so that one end of the brazing metal body (1) protrudes outward. Fit into the large diameter part (32) for the wax reservoir. Flux is applied in this state, and brazing is performed by heating in a furnace in an appropriate atmosphere. When the body to be placed (1) is melted, the molten state of the portion of the entire planned joining portion of the metal pipe (30) and the metal component (31) including the uppermost portion over the predetermined length in the circumferential direction is Although the brazing filler metal flows down due to the force and a defective portion is generated, the molten brazing filler metal obtained by melting the filling portion (2) flows into the defective portion, and as a result, the horizontal level of the metal pipe (30). A good and uniform fillet is formed over the entire circumference between the outer peripheral surface of the cylindrical end portion (30a) and the inner peripheral surface of the brazing metal large-diameter portion (32) of the metal component (31).

In the above case, when the brazing filler metal is made of a flux-containing brazing material, the application of the flux is unnecessary.

FIG. 3 to FIG. 5 show modified examples of the filling portion of the placement wax of the first embodiment. In the following description, the left and right of each drawing will be referred to as the left and right.

In FIG. 3, the filler portion (5) of the placement wax is formed integrally with the right end portion of the upper portion of the placement wax body (1) so as to form an acute angle with the placement wax body (1). Inclined radially outward toward the left.

In FIG. 4, the supplemental portion (6) of the placement wax is integrally formed so as to be continuous with the upper right end portion of the placement wax main body (1), and extends radially outward and bends leftward. ing.

In FIG. 5, the filler brazing part (7) is integrally formed so as to be continuous with the upper right end of the solder brazing body (1) and is bent to the left in an arc shape.

The filling portion of the placement wax of the first embodiment can be appropriately changed to other shapes.

FIG. 6 shows a second embodiment of the present invention. This embodiment is a placement braze used to braze two metal plates (10) having hanging bends (10a) at the side edges between the bends (10a).

In FIG. 6, the placement wax is connected to a belt-shaped placement wax main body (11) having a width equal to that of the bent portion (10a) of the metal plate (10) and an upper edge of the placement wax main body (11). It is composed of a complementary portion (12) which is integrally formed, extends upward and is folded downward.

Brazing of two metal plates (10) using such a brazing filler metal is performed as follows. That is, first, both metal plates (10) are arranged so that the brazing main body (11) between the bent portions (10a) of both metal plates (10) is interposed. Flux is applied in this state, and heating is performed in an appropriate atmosphere in a furnace to apply the flux. When the brazing main body (11) melts, the molten brazing material in the entire joining area between the bent parts (10a) of the two metal plates (10) flows down due to gravity, causing a defect in the upper part of the joining area. Although a part is generated, the molten brazing filler metal obtained by melting the filling part (12) flows into the defective part, and as a result, it is even between the bent parts (10a) of both metal plates (10). Fillets are formed over the entire length.

In the above, when the placement braze is formed of a flux-containing brazing material, the application of the flux is unnecessary.

In the brazing filler metal of the second embodiment, the shape of the filling portion can be changed as appropriate. For example, it is integrally formed so as to be continuous with the upper edge of the brazing filler metal body (11) and extends straight upward. It may be one.

7 and 8 show a third embodiment of the present invention. This embodiment is intended to be used to braze bar-shaped metal parts (15) having a circular cross section in a butt-to-butt relationship.

In FIG. 7 and FIG. 8, the placement wax is connected to a disc-shaped placement wax body (16) having the same size as the end surface of the rod-shaped metal component (15) and an upper portion of the placement wax body (16). It is formed as a single body and extends slightly upward, and comprises a supplementary portion (17) protruding leftward.

Brazing of the two rod-shaped metal parts (15) using such a brazing filler metal is performed as shown in FIG. That is, first, the rod-shaped metal parts (15) are arranged in a butt shape with the placement brazing main body (16) interposed between the end surfaces of the rod-shaped metal parts (15). Flux is applied in this state and brazing is performed by heating in a furnace in an appropriate atmosphere. When the brazing main body (16) melts, the molten brazing material in the entire joining area between the end faces of the two rod-shaped metal parts (15) flows down due to gravity, and a defect occurs at the upper part of the joining area. However, the molten brazing filler metal obtained by melting the filling part (17) flows into the defective part, resulting in the formation of a uniform fillet between the end faces of both rod-shaped metal parts (15). To be done.

In the above description, when the placement solder is formed of a flux-containing brazing material, the application of the flux is unnecessary.

In the placement solder of the third embodiment, the shape of the filling portion can be changed as appropriate.

Further, in the third embodiment, when the rod-shaped metal component to be brazed has another shape such as an elliptical shape or a polygonal shape, the shape of the brazing body of the brazing metal is also a rod-shaped metal. It has the same shape as the cross-sectional shape of the part.

FIG. 9 shows a fourth embodiment of the present invention. In this embodiment, a first metal part (20) having a groove (20a) on the upper surface and a second metal part (21) having a ridge (21a) fitted in the groove (20a) on the lower surface are provided. Is a brazing tool used for brazing the groove (20a) and the ridge (21a) in a fitted state.

In FIG. 9, the placement wax comprises a vertical portion (25a) and a horizontal portion (25b) connected to the upper edge of the placement wax body (25) having an L-shaped cross section, and a horizontal portion (25b). It is composed of a supplementary portion (26) that extends upward and extends outward in the left-right direction, connected to the tip of the. The height of the vertical part (25a) of the brazing main body (25) is equal to the depth of the concave groove (20a) of the first metal part (20), and the width of the horizontal part (25b) is the second metal part ( It is equal to the width of both sides of the ridge (21a) on the lower surface of (21).

Brazing of the two metal parts (20) and (21) using such a brazing solder is performed as follows. That is, first, in the concave groove (20a) of the first metal part (20), the vertical part (25a) of the placing brazing body (25) comes into surface contact with the side surface of the concave groove (20a) and the horizontal part (25b). Place the brazing wax so that it extends laterally outward. Then, the ridge (21a) of the second metal part (21) is fitted into the concave groove (20a) of the first metal part (20). In this state, flux is applied and brazing is performed by heating in an appropriate atmosphere in a furnace. When the brazing main body (25) melts, the molten brazing material in the entire joining area of the two metal parts flows down due to gravity, and a defect occurs at the upper part of the joining area, but the filling portion (26) The brazing filler metal in a molten state obtained by melting the metal flows into the recess, and as a result, a uniform fillet is formed over the entire length between the bent portions of both metal plates.

In the above, when the placement solder is made of a flux-containing brazing material, the application of the flux is unnecessary.

In the brazing filler metal of the fourth embodiment, the shape of the filling portion can be changed as appropriate, for example, it is integrally formed so as to be continuous with the tip of the horizontal portion (25b) of the brazing filler metal body (25), It may be extended and bent outward. Further, for example, it may be integrally formed so as to be continuous with the tip of the horizontal portion (25b) of the main brazing main body (25), extend upward and be folded back downward.

The shape of the placing brazing body of the placing braze according to the present invention is not limited to those of the above-mentioned four embodiments, and can be appropriately changed according to the shapes of the two metal materials to be brazed. The shape can also be appropriately changed according to the shape of the main body.

[0037]

[Effect of device]

 According to the placement wax of the present invention, as described above, when the combination of two metal materials is loaded into the furnace after setting the placement wax, the supplemented portion remains in the body of the placement wax during heating in the furnace. It does not cause positional displacement. Therefore, the molten brazing filler metal obtained by melting the filled portion surely flows into the defective portion caused by the molten molten brazing filler metal flowing down from the brazing body during brazing, resulting in 2 A good fillet is formed on the brazed part between the two metal materials, which prevents the brazing failure.

[Brief description of drawings]

FIG. 1 is a perspective view showing a placing wax according to a first embodiment of the present invention.

FIG. 2 is a partial vertical cross-sectional view showing a method of brazing a metal tube and a metal component using the brazing filler metal shown in FIG.

FIG. 3 is a view corresponding to FIG. 2 showing a modified example of the filling portion of the placement wax of the first embodiment.

FIG. 4 is a view, corresponding to FIG. 2, showing another modified example of the filling portion of the placement wax of the first embodiment.

FIG. 5 is a view corresponding to FIG. 2 showing still another modified example of the filling portion of the placement wax of the first embodiment.

FIG. 6 is a schematic view of a second embodiment of the present invention, which uses a brazing wax;
It is a vertical sectional view showing a method of brazing a sheet of metal plates.

FIG. 7 is a perspective view showing a placing wax according to a third embodiment of the present invention.

8 is a partial vertical cross-sectional view showing a method of brazing two rod-shaped metal parts using the brazing filler metal shown in FIG. 7. FIG.

FIG. 9 is a schematic view of a second embodiment of the present invention using the placement wax.
It is a vertical sectional view showing a method of brazing two metal parts.

FIG. 10 is a partial vertical cross-sectional view showing a method for brazing a metal tube and a metal component using a conventional brazing filler metal.

FIG. 11 is a partial vertical cross-sectional view showing a state after brazing a metal tube and a metal component using a conventional brazing filler metal.

[Explanation of symbols]

 1 Wax main body 2 Filling part 5 Filling part 6 Filling part 7 Filling part 10 Metal plate 11 Place brazing body 12 Filling part 15 Rod-shaped metal part 16 Place brazing body 17 Filling part 20 First metal part 21 Second metal part 25 Placing body 26 Filling part 30 Metal tube 31 Metal parts

Claims (1)

[Scope of utility model registration request] 1. A brazing braze used for brazing of two metallic materials by a brazing brazing method, wherein the brazing brazing body has a predetermined shape, and the upper side of a portion of the brazing brazing main body where the two metallic materials are to be joined at the time of brazing. Let's place it with a supplementary part formed integrally with the part coming to.