JPS6036339B2 - Many pipe brazing methods - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for brazing multiple pipes.

In general, a method for brazing a large number of pipes is as shown in FIG. A groove 6 is provided around the pipe,
The pipe 3 to be joined is inserted into the pipe insertion hole 7 of the base 2, and after preheating the base 2 and pipe 3, the brazing material 8 is pressed against the groove 6 carved around the pipe, and the base 2 and the pipe are connected again. 3, melting the brazing material 8 and pouring it into the pipe insertion hole 7, and brazing the base material 2 as shown in FIG.
After inserting the pipe 3 to be joined to the pipe 3 into the pipe insertion hole 7 of the base body 2, which has a slightly larger inner diameter to match the outer diameter of the former pipe 3, the pipe 3 is formed to have a slightly larger inner diameter to match the outer diameter of the former pipe 3. After placing the annular brazing filler metal 4 into a groove 6 carved around the pipe, the base 2 and the pipe 3 are heated, and the brazing filler metal 4 is melted and poured into the pipe insertion hole 7 for brazing. It is being However, in the former method, brazing a large number of pipes requires heating for a long time, so if the material is copper alloy, etc., stress cracking may occur later, the base body and pipes may melt during work, or the insertion depth may be If the amount of brazing is low, the first pipe to be brazed will often come off when the base is heated to braze the remaining pipes, making the work very difficult and reducing the cost of brazing work. becomes higher.

Furthermore, if electrical control parts are attached around the base to be brazed, the performance of the electrical control parts may deteriorate due to the heat effect due to the long brazing time.
Furthermore, in the latter case, in order to braze a large number of pipes to the base, it is necessary to form annular solder villages for the number of pipes to be joined to the base, which increases the cost of the brazing material.

Furthermore, if a molded tube or other part is attached to one end of the pipe that is to be joined to the base, it is difficult to insert the annular brazing material into the former pipe and fit it into the groove carved around the pipe. It had the disadvantage of being. The present invention eliminates the above-mentioned drawbacks, and the brazing method of the present invention will be explained below with reference to the drawings.

1, as shown in FIG. 3, a pipe insertion hole 7 for inserting a large number of pipes 3 in an annular shape on the surface of the base body 2, an annular groove 5 carved inside the pipes 3, and a groove along the circumference of the pipes 3. The distributor body is constructed by brazing the pipe 3 to the base body 2 (in this case, a cut product made by Masuzu), in which a portion A of the groove 6 is passed through, and in this case, the base material means.

The procedure for the brazing method is to first insert the required number of pipes (four in this case) into the pipe insertion hole 7 of the base body 2, and then insert the brazing material 4 formed into an annular shape into the annular groove around the pipe insertion hole 7. 5 for sale.

Thereafter, the entire body is heated by a method such as high-frequency induction heating to melt the brazing material. The melted brazing filler metal flows along the annular groove 5 and the groove 6 due to the spreading effect during melting and because the annular groove 5 and the groove 6 carved along the circumference of the pipe 3 are partially passed through at A. , penetrates into the pipe insertion hole 7 on the surface of the pipe 3 and the base (Masuzu cut product) 2. For this reason, it is possible to connect the base body (Masuzu cut product) 2 and a large number of pipes 3 with only one annular brazing filler metal 4, which is inserted into the annular groove 5 carved on the surface of the base body (Masuzu machined product) 2. It becomes possible to perform brazing at one time. Therefore, the heating time is short, and there is no risk of melting of the base body or pipe or stress cracking of copper alloys, etc.

In addition, since it is possible to braze many pipes at once, the initially brazed pipe will not come off, and since it is only necessary to lay one ring of brazing material, it is possible to braze each pipe with a ring of brazing material. This eliminates the hassle of inserting materials and prevents damage to the product itself. Moreover, the cost of work is also low. As is clear from the above explanation, the method of brazing a large number of pipes according to the present invention is a method for joining a large number of pipes to the surface of a base body in a ring shape, and the brazing method involves brazing a number of pipes to the outside or inside of the pipe insertion hole provided in the base body. An annular groove to be inserted and a groove located around the pipe insertion hole are carved in a part of the base body so that it fits in the groove, filler metal is applied to the annular groove, the solder metal is melted, and the pipe is inserted. This method is characterized by brazing the pipe inserted into the insertion hole and the base by pouring the fluid into a groove around the hole, making it possible to braze a large number of pipes and the base at once, thus reducing the heating time. It can be shortened, there is no risk of the base body or pipe melting, or copper alloys will cause stress cracks later on, and the initially brazed pipe will not come off, and only one circular brazing metal layer is required. Therefore, the labor of inserting a ring brazing filler metal into each pipe can be saved, the product itself can be prevented from being damaged, and the cost of the work can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a front view of a method of brazing multiple pipes according to the present invention, Fig. 2 is a vertical sectional view of the same part, Fig. 3 is a plan view of the base, and Figs. It is an explanatory view showing a brazing method. 1... Distributor body, 2...
・Base, 3... Pipe, 4... Brazing material, 5
......Annular groove, 6...Groove carved along the circumference of the pipe, 7...Pipe insertion hole. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1 In a brazing method in which a large number of pipes are joined to the surface of a base body in an annular manner, an annular groove located outside or inside a pipe insertion hole provided in the base body and a groove located around the pipe insertion hole are partially connected to the base body. A brazing material is placed in the annular groove so as to communicate with each other, and the brazing material is melted and poured into the groove surrounding the pipe insertion hole, thereby connecting the pipe inserted into the insertion hole and the base. A number of pipe brazing methods characterized by brazing.