JPH03216276A - Steel plate i-joint and its formation - Google Patents

Abstract

PURPOSE:To improve productivity and deposition strength by constituting the steel plate I-joint by performing brazing deposition in the fitted and superposed state by a couple of members in a split shape in half to which a branch pipe formed by press work by a steel plate is connected and on which a recessed groove having a short peripheral wall is formed. CONSTITUTION:The joint is formed by performing brazing deposition on a fitting mutual head 2 side opening end peripheral part, an abutment of both ends of the connected branch pipe 4 and an assembly part of a superposed part of this branch pipe 4 and a base end part of the peripheral wall of the recessed groove 6. The mutual tack welding work prior to brazing deposition 5 is regulated to the minimum or made unnecessary. At the same time, heating and brazing deposition by passing the furnace inside is made possible by the structure of an opening end protruded in a stepped shape along the fitting part and the superposed part of the one member and a mass production system can be adopted. In addition, the deposition strength is improved by the fitting and superposing structure and the branch pipe side stress concentration is reduced and further, brazing connection by simple formation of a cylinder made at the branch pipe side as a connection fitting part to a piping end is made sure. Consequently, fears of a leak can be obviated even when being arranged under an exciting state extending for a long period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention generally relates to a pipe having a diameter of 20 Ill/I installed as a supply path for oil and air in automobiles or various machines and devices.
The present invention relates to a steel plate eye joint that is attached to the end of a pipe having a relatively small diameter of approximately Il or less to form a connection to a base body, and a method for forming the same.

(Prior Art) Conventionally, as shown in Fig. 5 (Japanese Utility Model Publication No. 35-3402), this type of steel plate eye joint and its forming method have been made by forming a pair of halves ( 11, 11°) and its opening edge (12
, 12°) are brought into contact with each other in a bad condition, and the corresponding contact area is welded (1
3) It was composed of L.

(Problems to be Solved by the Invention) However, in such conventional techniques, the structure of the welding (13) due to contact at the open end edge (12.12°) is difficult to achieve before welding. This requires a large number of mutual tacking operations, which causes troublesome work and impedes productivity.Also, it tends to lead to incomplete welding work, and at the same time, there is a shortage of welding area. Due to insufficient welding strength, leakage often occurs when installed under vibration conditions.

The present invention has been made in view of the above-mentioned problems of the prior art, and it minimizes or eliminates the need for mutual tacking prior to solder welding, and also enables hot solder welding by passing through a furnace, so that a large quantity of solder can be welded. In addition, by ensuring a sufficient welding area, the welding strength at the solder welded part is increased, and stress concentration on the branch pipe side is reduced. A steel plate eye joint and a steel plate eye joint that can be easily formed into a cylindrical shape and ensure subsequent soldered connections, eliminating concerns about leakage even when installed under long-term vibration conditions. The purpose of this study is to propose a molding method for this purpose.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a mounting hole penetrating through the axial center of a flat seat surface on the head side, and an annular shape communicating with the mounting hole inside. One member has a cylindrical branch pipe which is curved into a cylindrical shape and has both ends abutted and protrudes integrally, and the other member has a cap-shaped head having a concave channel. A pair of half-shaped members each having a substantially semicircular groove having a short circumferential wall corresponding to the cylindrical branch pipe are fitted around the opening end of the head, with the mounting hole coaxially aligned. The gist of the invention is a steel plate eye joint constructed by welding together the mutually assembled parts of the abutting parts at both ends of the branch pipe and the proximal end of the circumferential wall of the recessed groove, and the overlapping parts of the branch pipe and the proximal end of the peripheral wall of the recessed groove. A burring wall is provided around the periphery of the mounting hole, and the mounting hole is formed in advance through the axial center of the flat seat surface on the head side by press working with a steel plate material, and a burring wall is provided inside. Continuing to the cap-shaped head having an annular groove channel communicating with the mounting hole,
One of the members has a cylindrical branch pipe which is curved into a cylindrical shape and protrudes integrally with both ends abutting, and the other member has a substantially semicircular recess having a short circumferential wall corresponding to the cylindrical branch pipe. A pair of half-cut members with grooves formed are formed,
Furthermore, while holding the pair of members so that the mounting holes are aligned coaxially, the circumference of the open end of the head, the contact portions of both ends of the branch pipe, and the overlapping portion of the branch pipe and the proximal end of the peripheral wall of the groove. The gist of this invention is a method of forming an eye joint made of a steel plate, which is formed by fitting and assembling the parts together, and then subjecting them to heat treatment by passing them through a furnace, and then soldering the assembly parts to each other.

(Function) Since the present invention is based on such a structure and its molding method,
Brass welding structure at the assembly part of the opening end periphery on the head side of the mating parts, the contact part of both ends of the connected branch pipe, and the overlapping part of the branch pipe and the proximal end of the peripheral wall of the concave groove. This method minimizes or eliminates the need for mutual tacking work prior to solder welding, eliminating the troublesome work involved, and at the same time, the opening protrudes stepwise along the fitting and overlapping parts of one member. The structure of the end allows for hot solder welding by passing through a furnace, making it possible to adopt a mass production method, and the fitting and polymerization structure improves welding strength and reduces stress concentration on the branch pipe side. By simply forming a cylindrical part on the branch pipe side as a connection attachment part to the pipe end to ensure a reliable brazed connection, there is no need to worry about leakage even if the installation is under excitation conditions for a long period of time. will be eliminated.

(Example) Hereinafter, embodiments of the present invention will be described based on the drawings. Figure 1 is a plan view of a steel plate eye joint constructed by the forming method of the present invention, and Figure 2 is the right side of Figure 1. Front view, 3rd
The figure is a cross-sectional view taken along the line A-A in Figure 1, and Figure 4 is a view corresponding to Figure 3 showing another embodiment. A mounting hole (3
) is provided through the cap-shaped head (2) and has an annular groove channel (6) therein communicating with the mounting hole, and one member thereof is curved in a cylindrical shape. A cylindrical branch pipe (4) formed by abutting both ends is integrally projected, and the other member is provided with a substantially semicircular groove (4°) having a short circumferential wall corresponding to the cylindrical branch pipe (4). ).

In order to increase the strength of the eye joint in the axial direction, it is preferable to provide a burring wall (3°) around the mounting hole (3) as shown in FIG.

Then, using the pair of members (1, 1''), fit the opening end circumference of the head (2) in a state where the mounting hole (3) is coaxial, and the branch pipe (4) is recessed. Groove (4
゜) is assembled by polymerizing to fit into the pipe, and in the assembled state, a paste or ring-like material of copper, brass, etc. Either attaching a solder material made of wire rod or the like, or plating the solder material on the assembly portion or the contact portions at both ends of the branch pipe in advance, and heating the solder material to the melting temperature of the solder material by passing it through a furnace. It is formed by welding (5) the attachment parts etc. with solder. Note that (7) is a stopper wall to the end of the pipe that protrudes inward.

(Effects of the Invention) As explained above, the steel plate eye joint and the method for forming the same according to the present invention have a concave groove (4) having a short circumferential wall in which branch pipes (4) each formed by press working of a steel plate are connected. A pair of half-cut members (゜)
1,1°) and solder welding (
5), it is possible to minimize or eliminate the mutual tacking work prior to soldering welding (5), thus eliminating the troublesome work and improving productivity. At the same time, the structure of the open end that protrudes stepwise along the fitting and overlapping parts of one member (1) enables heating solder welding by passing through a furnace, making it possible to adopt a mass production method. In addition, the fitted and polymerized structure increases the welding area and improves the welding strength, and also improves the welding strength of branch pipes (
4) It is possible to reduce stress concentration by connecting to the end of the piping only, and by making a reliable brazed connection by simply forming a cylinder, it is easy to install under vibration conditions. It also eliminates the worry of leakage over a long period of time.
This is an extremely useful steel plate eye joint and its forming method.

[Brief explanation of drawings]

Fig. 1 is a plan view of a steel plate eye joint constructed by a forming method according to an embodiment of the present invention, Fig. 2 is a right side view of Fig. 1, and Fig. 3 is a sectional view taken along line AA in Fig. 1. , FIG. 4 is a view corresponding to FIG. 3 of another embodiment, and FIG. 5 is a longitudinal sectional view of a conventional metal plate eye joint. (1,1')...member, (2)...head, (3)...
...Mounting hole, (4)...Branch pipe, (4゛)...Concave groove, (5)...Brazil welding, (6) Concave groove channel.

Claims (3)

[Claims] (1) Attachment holes (3
) is provided through the cap-shaped head (2) and has an annular groove channel (6) therein communicating with the mounting hole, and one member thereof is curved in a cylindrical shape. A cylindrical branch pipe (4) with both ends abutting and protruding integrally is formed on the other member, and a substantially semicircular groove (4') having a short circumferential wall is formed in the other member corresponding to the branch pipe (4). A pair of members (1
, 1'), and the opening end circumference of the head (2) and the branch pipe (4) that fit coaxially with the mounting hole (3).
) and the overlapping parts of the branch pipe (4) and the proximal end of the peripheral wall of the concave groove (4') are welded together with solder (5).
A steel plate eye joint characterized by being configured as follows. (2) A burring wall (3
A steel plate eye joint characterized by having a (3) A cap-shaped plate having a mounting hole penetrated through the shaft center of the flat seat surface on the head side by press working with a steel plate material, and an annular groove channel communicating with the mounting hole inside. Continuing with the head, one member has a cylindrical branch pipe that is curved into a cylindrical shape and abuts both ends and projects integrally, and the other member has a short peripheral wall corresponding to the cylindrical branch pipe. A pair of half-shaped members having a substantially semicircular groove formed therein are molded, and the pair of members are used to align the mounting hole coaxially with the peripheral part of the opening end of the head and the branch pipe. Fitting and assembly are carried out at the abutting parts of both ends of the pipe and the overlapping part of the branch pipe and the proximal end of the circumferential wall of the concave groove, and then heat treatment is performed by passing through a furnace to solder the mutually assembled parts. A method for forming a steel plate eye joint, characterized in that it is formed by welding.