JPH03216275A - Steel plate i-joint and its formation - Google Patents

Abstract

PURPOSE:To minimize tack welding work and to improve productivity by constituting a couple of members in a split shape in half formed by connecting a cylindrical branch pipe on one side and a branch wall protruded integrally on the other side by performing brazing deposition on a mutual assembly part of a head opening end peripheral part and a superposed part of the branch pipe and the branch wall. CONSTITUTION:The mutual tack welding work prior to brazing deposition 5 is regulated to the necessary minimum by brazing deposition 5 structure on the fitting assembly part of the fitting mutual head 2 side opening end peripheral part and the superposed part of the respectively connected branch pipe 4 and branch wall 4'. At the same time, heating and brazing deposition 5 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 side member and a mass production system is adopted. In addition, the deposition area is enlarged and the deposition strength is improved by the fitting and superposing structure and brazing connection by simple formation of a cylinder made at the branch pipe 4 side as a connection fitting part to a piping end is made sure. Consequently, there is no fear of a leak even when being arranged under an exciting state extending for a long period of time and the branch pipe side rigidity can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention generally relates to a pipe with a diameter of 20111/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 about FI or less to form a connection to a base body, and a method for forming the same.

(Prior Art) Conventionally, this type of eye joint made of steel plate and its forming method are as shown in Fig. 9 (publication of Utility Model Publication No. 35-3402). 11, 11') at its opening end edge (12
, 12') are in contact with each other, and weld the corresponding contact parts (1
3) It was composed of L.

(Problems to be Solved by the Invention) However, in such conventional techniques, welding (
13), prior to welding, a large number of mutual tacking operations are required, which causes troublesome operations and impedes productivity, and in general, it is difficult to perform welding operations. This tends to lead to imperfections, and at the same time, the welding strength is insufficient due to the lack of welding area, which often causes leakage when installed under vibration conditions.

The present invention has been made in view of the above-mentioned problems of the prior art, and minimizes, preferably eliminates the need for mutual tacking work prior to solder welding, and also enables heated solder welding by passing through a furnace. As a result, a mass production method can be adopted, and a sufficient welding area can be secured, increasing the welding strength at the solder welding part.Furthermore, the cylindrical shape on the branch pipe side can be easily used as a connection attachment part to the pipe end. By forming the pipe to ensure the subsequent soldered connection, there is no need to worry about leakage even when installed under long-term vibration conditions, and the branch pipe side is made of steel with high rigidity. The purpose of this paper is to propose an eye joint and its forming method.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention has a mounting hole penetrating through the axis 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 integrally protruding from the cap-shaped head having a concave channel, and the other member has at least a portion thereof facing the cylindrical branch pipe. A pair of half-shaped members each having an integrally protruding branch wall are fitted to the opening end circumference of the head, the branch pipe, and the branch wall, which are fitted with the mounting hole portion coaxially aligned. The main feature is a steel plate eye joint constructed by welding together the mutually assembled parts of the overlapping parts of the steel plate, and furthermore, the branch wall is formed into a C-shaped cross section, a semicircular shape, a missing circle shape, or a circular shape, and the assembly A burring wall is formed around the hole, and a mounting hole is formed in advance through the axial center of the flat seat surface on the head side by pressing a steel plate material, and a hole is formed inside that communicates with the mounting hole. One member has a cylindrical branch pipe integrally protruding from the cap-shaped head having a communicating annular concave channel, and the other member has at least one cylindrical branch pipe facing the cylindrical branch pipe. A pair of half-shaped members each having a series of branch walls with protruding parts are formed,
Further, with the pair of members, fitting and assembling is performed at the opening end circumference of the head and the overlapping part of the branch pipe and the branch wall with the mounting hole portion coaxially aligned, and then by passing through the furnace. The gist of the present invention is a method of forming an eye joint made of a steel plate, which is formed by applying heat treatment and soldering the assembly parts to each other.

(Function) Since the present invention is based on such a configuration and its molding method,
The solder welding structure at the fitting assembly part of the opening end periphery on the head side of the mating parts and the overlapping part of the connected branch pipe and branch wall allows temporary attachment work to be performed prior to solder welding. At the same time, the structure of the opening end protruding stepwise along the fitting and overlapping parts of the members on one side allows for easy passage through the furnace. This makes it possible to use hot solder welding, which makes it possible to adopt a mass production method, and the fitting and overlapping structure increases the welding area and improves the welding strength. By making sure the brazed connection by simply forming the cylinder on the side, there is no fear of leakage even if the pipe is installed under vibration conditions for a long period of time, and the rigidity of the branch pipe side is increased. becomes.

(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 formed into an oval by the forming method of the present invention, and Figure 2 is the same as that of Figure 1. Right side view, 3rd
The figure is a sectional view taken along the line A-A in Figure 1, Figure 4 is a diagram equivalent to Figure 3 of another embodiment, and Figures 5 to 7 are diagrams equivalent to Figure 2 of yet another embodiment, respectively. Fig. 8 is a view corresponding to Fig. 1 of yet another embodiment, in which (1, 1°) is a pair of half-shaped members, and the flat part forming the head side is previously press-formed using steel plate material. A mounting hole (3) is provided through the axial center of the seat, and the cap-shaped head (2) has an annular concave channel (6) communicating with the mounting hole inside. One member has a cylindrical branch pipe (4) formed by bending a steel plate material into a cylindrical shape and abutting both ends to integrally protrude, and the other member has a cylindrical branch pipe (4) that faces the cylindrical branch pipe (4). It is formed by integrally protruding branch walls (4゛) each having a semicircular cross section. Note that (7) is a stopper wall for the end of the pipe that protrudes inward, and a fourth wall is also provided to withstand the clamping pressure of the tightening bolt.
As shown in the figure, the burring wall (3) is placed around the mounting hole (3).
゜) is preferably provided.

Then, using the pair of members (1, 1°), fit the open end circumference of the head (2) with the mounting hole (3) part coaxially aligned, and connect the branch pipe (4) with the opening end circumference of the head part (2). Branch wall (4
゜) is assembled by polymerizing them, and a solder material made of paste or ring-shaped wire of copper, brass, etc. is attached along the assembled part, or Alternatively, the parts to be assembled are plated in advance with a solder material, passed through a furnace, heated to the melting temperature of the solder material, and the parts to be joined to each other are welded together (5). The branch pipe (4) is not limited to a semicircular cross section, but may have a substantially C-shaped cross section that supports both ends of the branch pipe (4) as shown in FIG. As shown in the figure, if the periphery of the opening end of the head (2) is fitted and caulked to a circular cross section surrounding the branch pipe (4) or a circular cross section surrounding the branch pipe (4), no temporary attachment work is required. or,
As shown in Figure 8, the branch wall (
4°) can also be formed.

(Effects of the Invention) As explained above, the steel plate eye joint and the method for forming the same according to the present invention are a half-shaped eye joint in which a branch pipe (4) and a branch wall (4゛) each formed by pressing a steel plate are connected. Since the pair of members (1, 1°) consisting of a shape are fitted and overlapped, they are welded with solder (5),
The mutual tacking work prior to solder welding (5) can be minimized, preferably not required at all, thus eliminating the troublesome work and improving productivity. The structure of the open end portion protruding stepwise along the fitting portion and the overlapping portion of the member (1゛) enables heating solder welding by passing through a furnace, making it possible to adopt a mass production method. In addition, the welding strength is improved by the fitted and overlapping structure, and the soldered connection is ensured by the simple formation of a cylinder as a connection attachment part to the pipe end on the branch pipe (4) side. This is an extremely useful steel plate eye joint and its forming method, as it can eliminate concerns about leakage over a long period of time even when installed under vibration conditions, and can also increase the rigidity of the branch pipe side. .

[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 diagram equivalent to FIG. 3 of another embodiment, FIGS. 5 to 7 are diagrams equivalent to FIG. 2 of yet another embodiment, and FIG. 8 is a diagram equivalent to FIG. 1 of yet another embodiment. A corresponding view, FIG. 9, is a longitudinal sectional view of a conventional eye joint made of metal plate. (1,1°)...member, (2)...head, (3)...
...Mounting hole, (4)...Branch pipe, (4゛)...Branch wall, (5)...Brazil welding, (6)...Concave channel.

Claims (4)

[Claims] (1) Attachment holes (3
) passing through the cap-shaped head (2), which has an annular groove channel (6) communicating with the mounting hole, and one member of the cap-shaped head (2) has an integrally protruding cylindrical branch. A pair of half-shaped members each having a pipe (4) connected to the other member and a branch wall (4') at least partially protruding integrally facing the branch pipe (4). 1, 1') into the mounting hole (3
) parts fitted together coaxially, the opening end periphery of the head (2) and the mutually assembled part of the overlapping part of the branch pipe (4) and the branch wall (4') are welded with solder ( 5) A steel plate eye joint characterized by being configured as follows. (2) An eye joint made of a steel plate, wherein the branch wall (4') has a C-shaped cross section, a semicircular cross section, an occluded circular cross section, or a circular cross section. (3) A burring wall (3
’) A steel plate eye joint characterized by having. (4) Cap-shaped with 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 integrally protruding from the head, and the other member has a branch wall facing the cylindrical branch pipe and at least a portion thereof protruding integrally. A pair of half-cut members are molded, and with the pair of members coaxially aligned with the mounting hole, the periphery of the open end of the head and the overlapping part of the branch pipe and the branch wall are formed. 1. A method for forming an eye joint made of steel sheets, which comprises fitting and assembling the steel plate, and then subjecting the assembly to heat treatment by passing through a furnace to solder-weld the mutually assembled parts.