JPS60227093A - Manufacture of pipe with 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] Industrial applications The present invention relates to a method for manufacturing a joint E1 pipe.

Conventional technology The conventional method of fixing the joint body and the pipe body by melting the welded body, such as brazing or welding, is to insert the pipe body into the joint body whose parts to be welded are pre-applied with flux, and then i8 Q'4 i with silver solder, copper solder, etc. on the end face of the main body
This was done by applying a wooden wire object and melting it with a burner or the like to cover the end surface of the hand body and the outer surface of the tube body.

Problems to be Solved by the Invention In the conventional method, when melting the wire of the welded body, if it is too thin, it will scatter in the form of droplets, forming a continuous welded part. If this is too much, it will take time to melt, and as a result, holes may form in the welded parts of thin pipe bodies, and discoloration and deterioration due to high temperatures may occur. When welding different materials such as mild steel for the main body and stainless steel for the vessel and main body, it is difficult to weld the pipe without damaging the main body with a small amount of welded material.

The present invention addresses the above-mentioned problems, and even if the joint body and the pipe body are made of Tatsumi type materials, the amount of water is reduced. It is an object of the present invention to provide a method for manufacturing a pipe with a joint, which makes it possible to weld eight pieces together without damaging the pipe body.

The method for manufacturing a four-stage jointed pipe according to the present invention that solves the problems is as follows: △: Step of applying a welded body (Jh) to the oMi surface of the bolt main body.

[1, Step 1 of thinning the meat j9 on the end side of the main body
, C9 pipe Mikyu from the end side Ij'J:L! Process of inserting into the joint body.

[), said FEI'? , 'melting the body and welding it to the outer periphery of the tube body and the end face of the f body': Culm.

The configuration is as follows.

In Example 1-1, a joint body 1 made of mild steel or the like has a G through hole 2 formed in the center, and a PI body 4 of silver solder, copper solder, etc. is overlaid on the end face 3 of one end thereof. I'll wear it. 5 is a tapered thread formed at the other end of the joint body 1.

Next, as shown in FIG. 2, the end of the welded body 4 on the end surface 3 side of the joint body 1 and the inner surface of the through hole 2 are cut to reduce the wall thickness on the end surface 3 side of the N1 body 1. When forming part 6, J
In i, the cross section of the welded body 4 is made smaller.

Next, as shown in FIG. 3, sand or the like is deposited on the outer peripheral surface of the end 8 of the tube body 7 of a parallel wave tube made of stainless steel or the like, a spiral wave tube, or a normal waveless tube. Apply flux to this end E3, vertically 1 body 1, 1) 0 mark, thinner part 6 from the 3 side.
Insert it inside.

Then, an active gas such as nonorgone or nitrogen is sent into the pipe body 7 and the joint body 1, and the welded body 4 is melted by TIG welding, etc., and this is bonded to the end 3 of the joint 1 body 1 and the pipe body Welded to the outer peripheral surface of 7, lK!
and fix it to form a pipe with a fitting.

Note that it is also possible to build up the welded body 4 using stainless steel of the same quality as the tube body 7, and in this case, there is no need to apply flux to the outer circumferential surface of the end portion 8 of the tube body 7.

FIG. 4 shows another embodiment of the joint 4 main body 1 with 11 pieces (゛,
The joint body 1 has a flange 9 on its outer periphery, and the engaging portions 11 of the joint pulls 1 to 10 are engaged with the flange 9, and the pipe threads 13 that engage with the joint body 1 through the packing holes 12 are engaged. Screw the female thread of the joint socket 1-10 onto the 43 screw 15 of the connector 14 that has it! There are ζ things.

Fig. 5 shows another embodiment of the present invention, in which the diameter of the cut portion on the inner surface of the through hole 2 of the J joint body 1 shown in Figs. Insert the parallel wave of the tube body 7 into the ridge part of the main body 7 by inserting it, align the tip of the ridge part with the end of the joint body 1, and melt the welded body 4. This is welded to the end face of the joint body 1 and the peak of the parallel wave of the tube body 7, and the joint body 1 and the tube body 7 are connected to [I! ! The first piece was made into a pipe with a joint.

FIG. 6 shows a structure in which the joint body 1 and the pipe body 7 in the embodiment shown in FIG. 4 are joined to each other in the structure shown in FIG. 5.

Effects of the Invention According to the present invention, on the end face of the joint body? 8 After attaching the weld, the thickness of the joint body is thinned, so the cross-sectional area of the weld is small (also, the bonding force between the joint body and the weld is large, so the weld is melted and the weld is made into 711 navy blue). ;When welding the end face of the joint body to the outer surface of the joint body, the welded body does not become drop-shaped and separate from the end face of the joint body, and because its cross-sectional area is small, even if the pipe body is thin, it will not be damaged by heat. It does not cause holes, discoloration, or deterioration, and can be used especially when the joint body and pipe body are made of different materials such as mild steel and stainless steel.

[Brief explanation of the drawing]

Fig. 1 is a half cross-sectional view of the joint body used in the method of the present invention, Fig. 2 is a half cross-sectional view of the same after processing, and Fig. 3 is a pipe with a joint made by the method of the present invention. Fig. 4 is a half sectional view of another pipe with a fitting as above, Fig. 5 is a half sectional view of yet another pipe with a fitting as above, Fig. 6 is a further fitting as above. It is a half sectional view of an attachment tube. 1... Joint body, 2... True through hole, 3... End surface, 4
...welded body, 5...tapered screw, 6...thin wall part,
7... Pipe body, 8... End, 9... Tsuba, 10...
・Joint oak 1~. DESCRIPTION OF SYMBOLS 11... Engagement part, 12... Packing, 13... Pipe screw, 14... Connection tool, 15...
・Male thread.

Claims (1)

[Claims] A WA manufacturing method for a pipe with a joint, which comprises the following steps. △, process of attaching the welded body to the end face of the joint body. B: Thinly cover the end surface side of the joint body. [Chang. A step of inserting and covering the C1 pipe body into the joint body from the end face side. D. Melting the welded body and welding it to the outer periphery of the tube body and the end face of the joint body.