JPS6254583B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates primarily to a method for setting a brazing material in preparation for brazing connections between members when manufacturing a sheet metal impeller for a torque converter.

Conventionally, this type of method involves arranging a plurality of blades radially within an annular gap between an outer shell and an inner core, and temporarily bonding the shell and the core to a workpiece by brazing. In order to prepare for this, a type of brazing filler metal has been proposed, but in this case, the brazing filler metal is generally a wire brazing filler metal or a paste brazing filler metal, which has the disadvantage that it is not always easy to set it. accompanied by.

The object of the present invention is to provide a method free of such inconveniences, in which a plurality of blades are arranged radially within an annular gap between an outer shell and an inner core, and the blades are connected to the outer shell. In a type in which a brazing material is set in a workpiece temporarily bonded to the core in preparation for brazing treatment, the workpiece is immersed in an adhesive liquid at the open end on the outer peripheral side of the annular gap. After applying this liquid,
Next, the opening end is immersed in a powder brazing material to adhere the brazing material thereto.

Embodiments of the present invention will be described with reference to the attached drawings. In the drawings, 1 indicates an outer shell, and 2 indicates an inner core. A plurality of blades 4 are arranged radially within an annular space 3 formed between the outer shell 1 and the inner core 2, and these blades are connected to the shell 1. The core 2
The retainer 5, claw pieces 6, etc. are used to temporarily bind the parts to form a semi-assembly of a sheet metal impeller, that is, a workpiece 7.
to form.

The workpiece 7 is to be filled with a brazing material in preparation for the soldering between the respective members.According to the present invention, a powder brazing material is used as the brazing material, and this is placed in the annular gap 3 described above. It was applied to the open end on the outer circumference side. To explain this in detail with reference to the drawings, the workpiece 7 is prepared in a downward position with the shell 1 on the upper side and the core 2 on the lower side, as shown in FIG. The workpiece 7 is placed above the tank containing the adhesive liquid 8, and is then given a downward movement, so that the workpiece 7 is placed at the open end 3a on the outer circumferential side of the annular gap 3 as shown in the figure. Since it is immersed in the liquid 8 and has the liquid 8 attached to it, the excess of the attached liquid 8 is removed by shaking off after the next movement upward, or it is further dried. Next, the workpiece 7 is transferred to the upper side of the tank containing the powder brazing material 9 as shown in the second figure, and is given a downward movement once in substantially the same manner, thus causing the open end 3
A is obtained with the brazing material 9 attached thereto as shown in the figure, completing the setting of the brazing material. Next, the workpiece 7 is heated in an upward position in a heating furnace, and the brazing material 9 is melted and guided into the gap between both side edges of each blade 4, and is brazed over its entire length. is obtained.

It should be noted that the workpiece 7 is in the above-described downward position with the mouth edge portion 1a of the shell 1 projecting longitudinally downward from the open end 3a. The liquid 8 adheres to the mouth edge 1a, which is not necessarily desirable. To prevent this, for example, as shown in FIG. 3 or 4, at least this outer periphery is attached to the mouth edge 1a. An enclosing cover member 10 is applied, which can then be removed and prepared for the setting of the filler metal 9.

In this way, according to the present invention, the workpiece is immersed in the adhesive liquid and then in the powder brazing material at the open end on the outer circumferential side of the annular gap to set the brazing material, making the work simple and reliable. This has the effect of improving efficiency by automating work as necessary.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of one example of the method of the present invention, and FIGS. 3 and 4 are explanatory diagrams of a modification thereof. 1... Outer Ciel, 2... Inner Core, 3...
...Gap, 4...Blade, 7...Work, 3a...
...Open end, 8...Adhesive liquid, 9...Powder brazing material.

Claims (1)

[Claims] 1. A workpiece in which a plurality of blades are arranged radially within an annular gap between an outer shell and an inner core, and which are temporarily bonded to the shell and the core, is brazed. In a type in which brazing material is set in preparation for processing, the workpiece is immersed in adhesive liquid at the open end on the outer circumferential side of the annular gap so that the liquid adheres thereto, and then the open end is immersed in adhesive liquid. 1. A method for setting a brazing material for a blade wheel, comprising: dipping the brazing material into a powdered brazing material to adhere the brazing material thereto. 2 A plurality of blades are arranged radially within the annular gap between the outer shell and the inner core, and the work piece is temporarily bonded to the shell and the core. In the case of a material setting type, the workpiece is immersed in the adhesive liquid at the open end on the outer peripheral side of the annular gap, with at least the outer peripheral cover member applied in advance to the mouth edge of the shell. After the liquid is applied to the blade wheel, the cover member is removed at the open end and then immersed in a powder brazing material to adhere the soldering material thereto. How to set materials.