JPS5881559A - Joining method of shaft member to fitting member - Google Patents

Abstract

PURPOSE:To prevent wasteful use of brazing filler metals by packing the brazing filler metal into the groove part provided circumferentially in the central part on the inside circumfeential surface f a fitting member, fitting the fitting member onto a shaft member and brazing both of them in such a way that the brazing filler metal comes on the top side of the shaft member. CONSTITUTION:A semicircular groove part 3 is worked circumferentially in the central part on the inside circumferential surface of a fitting member 1 and an optimum required amt. of brazing filler metal 4 is packed in the groove part 3. Thereafter, the member 1 with the metal 4 on the bottom side in positioned onto a shaft member 2 and is press-fitted. The assembled member 1 and the member 2 are heated, and are brazed by heating in such a way that the metal 4 comes on the top side of the part 3. Thus the molten metal 4 penetrates thoroughly not only into the upper part but also in the lower part by gravity and capillarity; at the same time, the brazing filler metal penetrates sufficiently into the right and left axial directions of the member 2 as well, whereby both members are joined at high strength with good workability without wasteful use of the metal 4.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a joining method for fitting members such as rings, and particularly relates to brazing.

Conventionally, when joining a shaft or pipe to a disc-shaped ring with a hole in the center, brazing is one of the joining methods, but in this method, the wax itself is shaped like a ring. After processing and press-fitting it into the gap on the inner circumferential surface of the ring from one side end, or by providing a depression for filling the brazing material on the end face of the ring and filling the depression with the brazing material, it is heated. I was doing waxing.

However, according to such conventional methods, the amount of brazing material used for the brazing itself is more than necessary, and the brazing material may adhere to unnecessary parts other than the brazing surface, such as the shaft or pipe life, or drip down. It was often wasted.

In addition, in order to set the wax on one end of the inner peripheral surface of the ring,
The melted solder metal had to penetrate a relatively long distance when measured at the other end, and if the ring had a large wall thickness, the solder metal would not flow easily and the solder would be incomplete and easily chipped. That is, there have been cases in which sufficient strength cannot be obtained by brazing.

The present invention was developed in view of these conventional drawbacks, and its purpose is to minimize the wasteful use of brazing filler metal, which is easy to work with, and provides a bond with excellent strength. The purpose is to provide a method.

The present invention is characterized by providing, for example, a semicircular groove in the circumferential direction at the center of the inner peripheral surface of a fitting member such as a ring, filling this groove with a desired brazing material required for joining, By fitting the fitting member into the shaft member such as a shaft or pipe, and heating and brazing after placing the solder metal on the upper side so that it can be rotated easily, waste of the solder metal is eliminated and the area around the solder metal is The reason for this is that it is good.

Hereinafter, one embodiment of the present invention will be explained in detail with reference to the drawings.

1 and 2 show joints joined according to the present invention, 1 is a fitting member such as a ring, 2 is a shaft member to which this fitting member 1 is joined, and in this embodiment, 1 is a fitting member such as a ring. In this case, a hollow pipe material is used, but a solid rod-shaped shaft may also be used.

In the present invention, first, a semicircular groove 6 is formed in the circumferential direction at the center of the inner peripheral surface of the fitting member 1, and this groove 6 is filled with the brazing material 4. This brazing material 4 is preferably solid and has a semicircular shape that matches the shape of the groove 6, but it is not particularly limited to powder, granule, or other forms. Further, the amount may be determined by calculation or experiment, and then filled. Therefore, the shape of the groove 6 of the fitting member 1 (
If the width, depth, etc. are adjusted (limited to a semicircular shape), the optimum required amount can be obtained by simply filling the groove 6 to the full, which is preferable from the point of view of workability.

Next, after filling the brazing material 4 in this manner, if the brazing material 4 tends to fall, the fitting member 1 is fitted onto the shaft member 2 with the brazing material 4 facing downward. In this case, for example, if the brazing material 4 is sealed and press-fitted with a sealing material that evaporates when heated (for example, J1 Fufutakaki 4-inch Yuria resin, lost wax, etc.), it will be possible to seal it with the inner circumferential surface. Even if there is some gap between them, there will be no chance of the brazing filler metal 4 spilling out.

When the fitting member 1 and shaft member 2 assembled as described above are heated and brazed, the groove 3 filled with the brazing material 4
so that it is on the -F side.

If heated in this state, the melted brazing material 4 will sufficiently penetrate not only the upper part but also the lower part due to gravity and capillary action, and at the same time, it will also sufficiently penetrate in the left and right axial directions of the shaft part hole 2. In other words, the soldering process is good and the soldering is strong. At this time, in order to improve the flowability of the brazing material 4, tapered portions 3a and 5a may be provided at the ends of the groove portion 3.

As is clear from the above explanation, according to the joining method of the present invention, the groove provided in the center of the inner peripheral surface of a fitting member such as a ring is filled with brazing material and brazed. It has a unique effect.

(a) Brazing metal is not wasted. In other words, since the groove of the fitting member is formed like a kind of storage pocket in the center of the inner circumferential surface, the brazing material may adhere to unnecessary parts of the shaft member or drip off, unlike in the conventional method. This is because the amount of brazing filler metal consumed can be reduced. This allows low-cost joining.

(b) Filling the solder metal is extremely easy and has good workability. Conventionally, the fitting member had to be press-fitted into a gap on the inner peripheral surface or a recess at one end. Since the trenches are designed to correspond to the required amount of brazing material, the optimum required amount can be obtained by simply filling the soldering material without any troublesome operations.

(c) Good soldering properties, and brazing can significantly improve strength. In other words, since the brazing material is set at the center (width) of the inner peripheral surface of the mating member, the distance that the melted brazing material has to penetrate is halved compared to conventional setting at one end. It is fine, and the solder metal has good coverage.

In addition, since the grooves in the brazing material are on the upper side during heating, penetration to the lower side is also good, and compared to conventional brazing, the area increases, and for this reason, brazing can be expected to improve strength. can.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing a joint portion of a shaft member and a fitting member joined by an embodiment of the method of the present invention. FIG. 2 is a vertical sectional front view showing the joint shown in FIG. 1. DESCRIPTION OF SYMBOLS 1... Fitting member, 2... Shaft member, 3... Groove part, 4
... wax wood. (1 other person) (7) Talented medical talent 2 levels! 319-

Claims (1)

[Claims] A groove provided in the circumferential direction at the center of the inner peripheral surface of the fitting member is filled with brazing material, the fitting member filled with the brazing material is fitted into the shaft member, and then the brazing material is placed on the upper side of the shaft member. A method for joining a shaft member and a fitting member, characterized by heating and brazing in such a manner that