JPS5854296A - Manufacture of branch pipe joint - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing branch pipe joints using thin-walled pipes used, for example, in hydraulic piping systems, e-type piping, or oil supply piping systems in gourds such as automatic pistons and construction work machines. .

In the conventional branch pipe joint, as shown in Figs. C was inserted and brazed with brazing material d. The manufacturing method of such a branch pipe joint is shown in Fig. 4 (A) and (B) Th
As shown in (0), first, drill A to the supervisor B.
A branch hole a is drilled in the branch hole a, and a pipe fitting is inserted into the main pipe a in which this branch hole a1 has been drilled from one side to the position of the branch pipe a, and then the opening bs of this pipe fitting is inserted. Insert branch pipe C into.

After that, the opening b1 of the pipe joint 1 and its lower end 1
111 with a tool B such as a bench to temporarily fix the main pipe head and the branch pipe C, and further.

Joint surface between main pipe a and the above pipe fitting, and pipe fitting and branch pipe a
The brazing material d is applied to the bonding surface f of the bonding surface f and heated to a predetermined Ω temperature, and the brazing material d is poured into the bonding surfaces e and f, thereby sealingly bonding the bonding surface.

However, the method for manufacturing the branch pipe joint described above is
As shown in the figure, the position of the branch hole am drilled in main pipe a shifts further in the circumferential direction and axial direction when the pipe fitting is inserted, thereby ensuring a predetermined flow rate of the fluid. Not only is it difficult to swage the pipe joint 1, but also the swage of the BO ridge of the pipe fitting 1 must be swaged with the machining AB, so that the swage is uniform over the entire joint surface. As a result, the brazing material is not evenly adhered to both the above-mentioned joint surfaces/sf, and there is a risk of a leakage accident of pressure fluid. When drilling a branch hole in the main pipe a, a drillum is used, which necessitates a troublesome work process such as the process of removing chips (also called paris).

Incidentally, the chips that are generated when the branch hole a1 is broken after the piping is damaged by vibrations from automobiles, etc., may be lost and flow out together with the pressure fluid.For example, in the fuel piping system, chips may clog the carburetor. become.

In order to solve the above-mentioned difficulties, the present invention first inserts a pipe joint into the main pipe, then inserts a branch pipe into the opening of the pipe joint, and then inserts a punch member having a caulking part and a punch part. By driving into the branch pipe, a branch hole is drilled in the main pipe, and at the same time, the main pipe is pressed to flatten it slightly, and the upper edge of the pipe joint is pressed by the caulked part. Then, filler material is poured into the joint surface of the above-mentioned Wa hand to form a ffi seal, which simplifies the manufacturing process and reduces leak defects and perforations due to one gap. The present invention provides a method for manufacturing a branch pipe joint, which aims to improve quality and reliability.

The present invention will be described below with reference to an illustrated embodiment.

The branch pipe fitting according to the present invention is a main IN 1 with a thin-walled pipe used in a fuel piping system, for example in a % 1 supplementary pipe fitting 2.
After inserting the branch pipe 8 into the upper opening 2a of the pipe joint 2, the branch hole 5 is opened by driving the punch member 4 having the caulked part 4a and the punch part 4b into the branch pipe 8. It is constructed by drilling and caulking, and then pouring brazing material 8 into the joint surface 6% 7 of the pipe joint 2.

That is, the method for manufacturing a branch pipe joint having the above-described structure according to the present invention is carried out in a first step.

In FIGS. 5 to 8, reference numeral 1 indicates a main pipe made of a thin-walled pipe, and the pipe fitting 2 is inserted into this main pipe l. insert,
After that, a nine-punch member 4 including a caulking portion 4a and a punch portion 4) is driven into the branch pipe 8. Then, the punch portion 4b of the punch member 4 punches a branch hole 6 in the vertical direction of the main pipe IK located in the pipe joint 2, and at the same time presses the main pipe 1 around this branch hole 6 by the pressing force of the punching operation. Then, as shown in FIG. 8, it is slightly flattened and brought into close contact with the inner wall surface 213 of the pipe joint 2, and the caulking portion 4a caulks the upper opening 2a of the pipe joint 2 from the outside. It looks like this.

The punch member 4 punches the branch hole 5 in the vertical direction with the punch portion 4b, and at the same time brings the outer circumferential surface of the main pipe l into close contact with the inner wall surface 2b of the pipe fitting 2, and also closes the upper opening 2a of the pipe fitting 2. It is designed to be fixed by tightening it.

After the punch member 4 is pulled out from the branch pipe 8, brazing material 8 is poured into the joint surface 6 between the pipe joint 2 and the main pipe 1 and the joint surface 7 between the pipe joint 2 and the branch pipe 8 to make a tight joint. KotoK
Yosi complete.

Therefore, the present invention can efficiently perform the drilling work of one branch hole 5 and the caulking work of two places at once, and can greatly simplify one work process.

Next, the embodiment shown in FIG. 9 is another embodiment of the punch member 4, in which the punch member 4 is formed by dividing the caulked portion 4a by providing a sliding part. 4& is K so that the upper opening 2a of the pipe joint 2 can be caulked, and has the same content as the above-mentioned specific example.

As described above, according to the present invention, the pipe joint 2 is inserted into the main pipe 1, the branch pipe 8 is inserted into the opening 2aK of the pipe joint 2, and then the caulked part 4a and the punched part 4b are inserted. By driving the punch member 4 equipped with
bVcW! At the same time, press the upper opening 2 of the pipe joint with the caulking part 4a to caulk it.
Since the brazing material 8 is poured into the joint surfaces 6 and 7 of the pipe joint 2 and the joints are sealed, there is only one hole in the branch hole 6, which not only simplifies the II manufacturing process but also allows for uniform caulking. Since leakage defects and clogging due to one gap can be reduced, the length ttryi can be hidden as the caulking allowance for the pipe joint 2. Moreover,
This has excellent effects such as eliminating the need for removing chips.

[Brief explanation of drawings]

Figure 11 shows the conventional 5) front view of the front 1 (Fig.
An enlarged sectional view of the chain 1/5A-A in the figure, Figure 8 is an explanation of the deformed state in Figure 2 (4, 41st Tsukasa (~, (to))
(0) is a diagram for explaining a conventional method for manufacturing a branch pipe joint, and FIG. FIG. 6 is a front view of a branch pipe joint manufactured according to the present invention, FIG. 7 is a diagram for explaining the manufacturing process of the present invention, and FIG.
The figures are an enlarged sectional view taken along the chain 4B-B in Fig. 7, and Fig. 9 is a perspective view of another punch member used in the housing of the present invention. l... Main pipe Q see pipe fitting, 8... Branch pipe, 4a
... Caulking g, 4b... Punch part, 4... Punch member, 5... Branch hole, 6.7... Joint surface, 8...
Low wood. Departing person's agent Kwon Suggestion Qing Figure 7 Figure 2 F, j Figure 4 (A) (B) 5th hearing 7ml Figure 8M Figure 9

Claims (1)

[Claims] First, a pipe joint is inserted into the main pipe, a branch pipe is inserted into the opening of the pipe joint, and then a punch member having a caulking part and a punch part is driven into the branch pipe. At the same time as drilling a branch hole in the main pipe above. The main pipe is pressed to make it slightly flattened and brought into close contact with the inner wall surface of the pipe joint, and the caulking portion is pressed against the upper opening of the pipe joint to caulk it. Next, a method for manufacturing a branch pipe joint, characterized in that brazing material is poured into the joint surface of the pipe joint to seal the joint.