JPH06207693A - Manufacture of hose intermediate fixture - Google Patents

Abstract

PURPOSE:To eliminate a risk in which the inner peripheral shape of a sleeve is deformed by thermal affection during the period in which an attaching part forming member is attached to the outer periphery of the sleeve by welding. CONSTITUTION:A hose intermediate fixture composed of a sleeve 3 which is squeezed at its outer peripheral part so as to fix a hose, a nipple 3 which is formed separately from the sleeve 3 and is adapted to be inserted into the hose, and an attaching part forming member 15 adapted to be locked or fixed to another member is integrally incorporated with the outer periphery of the sleeve 3, is manufactured. An annular bulged part 21 is formed at the outer periphery of the sleeve 3 which is formed by cutting a pipe 19 with a predetermined length, with the use of a forming process, and the attaching part forming member 15A which is formed by pressing out a plate material, is welded to the annular bulged part 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sleeve whose outer peripheral portion is caulked (which is normally pressed and deformed by a die arranged radially) for fixing to a hose, and a sleeve formed separately from the sleeve. The present invention relates to a method of manufacturing a hose intermediate fitting having a structure in which a mounting portion forming material for locking or fixing to another member is integrally formed on the outer circumference of the sleeve, the nipple being inserted into the hose intermediate fitting. Examples of the hose pipe to which the hose intermediate fitting manufactured in the present invention can be applied include hose pipes such as a brake hose, an air hose, and a fuel hose.

[0002]

2. Description of the Related Art As a hose intermediate fitting, for example, a hose intermediate fitting having a structure as shown in FIG.
6310, etc.).

A sleeve 3 having an outer peripheral portion crimped for fixing to a hose (reinforcing hose) 1 and a nipple 5 which is formed separately from the sleeve 3 and is inserted into the hose 1. Has a mounting portion for locking or fixing to another member, that is, a clip groove 9 into which a locking flange 7 and a spring clip (not shown) for mounting can be inserted.

The sleeve 3 of the intermediate metal fitting having the above construction
Is usually formed by cutting, but in order to reduce the cutting as much as possible, two mounting portion forming materials (rings) are formed on the outer periphery of the sleeve (cylindrical body) 3 formed by cutting the pipe as shown in the figure. ) A technique for welding or brazing 11 and 13 is described in the above publication.

[0005]

However, when the mounting portion forming material is welded or brazed directly on the outer peripheral surface of the thin sleeve (around 1 mm), the inner peripheral shape of the sleeve is affected by heat. May be deformed. In particular,
In the case of pressure welding such as resistance welding, since it is performed without applying pressure in the sleeve center direction, it is easier to deform. Further, when welding the attachment portion forming material at the end, welding spatter may be scattered and adhered to the inner surface of the sleeve.

[0006] These phenomena are desirable because when the hose with the nipple is inserted into the sleeve and the outer circumference of the sleeve is caulked, the workability of hose fitting may be deteriorated and the outer peripheral surface of the hose may be damaged. Absent.

In view of the above, the object of the present invention is to attach the mounting portion forming material to the outer circumference of the sleeve by welding, there is almost no possibility that the inner peripheral shape of the sleeve will be deformed due to the influence of heat, and the end portion will be welded. Even in such a case, it is an object of the present invention to provide a method of manufacturing a hose intermediate fitting in which welding spatter is not likely to be scattered and adhered to the inner surface of the sleeve.

[0008]

The method for manufacturing an intermediate metal fitting of the present invention solves the above problems by the following constitution.

It comprises a sleeve whose outer peripheral portion is caulked to fix the hose, and a nipple which is formed separately from the sleeve and is inserted into the hose. The outer periphery of the sleeve is locked or fixed to another member. Is a method of manufacturing a hose intermediate fitting having a structure in which a mounting portion forming material is integrated, in which an annular bulging portion is formed by forming on the outside of a sleeve formed by cutting a pipe, It is characterized in that a mounting portion forming material formed by pressing is welded to the annular bulging portion.

[0010]

EXAMPLES The present invention will now be described in detail based on examples. The same parts as those in the above-mentioned example are designated by the same reference numerals, and the description thereof is partially or entirely omitted.

(1) The present invention is, in a superordinate concept, a hose 1.
A sleeve 3 whose outer peripheral portion is caulked to fix the
The sleeve 3 and a nipple 5 which is formed separately from the sleeve 3 and is inserted into the hose 1. An attachment portion forming member 6 for locking or fixing to another member is integrally formed on the outer periphery of the sleeve 3. It is a method of manufacturing a hose intermediate fitting having a structure.

First, as shown in FIG. 2, a one-sleeve type mounting device having a hexagonal detent flange 15 at the middle and a locking flange 17 at the end will be described as an example. However, it is not limited to this. That is, a type having sleeves on both sides of the whirl-stop flange, a polygonal shape of the whirl-stop flange, or a two-sided drop shape is optional.

(2) The sleeve 3 is formed of a short pipe 19A obtained by cutting a pipe (usually a seamless steel pipe) 19 into a predetermined length. Furthermore, an annular bulge 21 is formed in the sleeve middle portion by bulging (a type of forming), and a locking flange 17 is formed at the end of the sleeve by a flare (a type of forming).

Here, the size of the annular bulging portion is, for example,
When the outer diameter of the sleeve is 12 mmφ, the outer diameter of the bulge is 14
~ 16mm

(3) A hexagonal detent flange forming material (mounting portion forming material) 15A is punched from a strip plate (plate material) 20 such as a steel plate, that is, formed by press punching.

(4) The ring-shaped flange forming material (mounting portion forming material) 15A is welded to the annular projection 21. Specifically, in a state where the sleeve 3 is erected with the locking flange 17 on the lower side, the anti-rotation flange forming material 15A is fitted into the sleeve 3 from the upper side, and the electrodes 23, 2 for resistance welding are provided.
Set between 3 and perform resistance welding. The conditions of this resistance welding are as follows: sleeve thickness 1 mm, non-rotating flange forming material 15A
When the plate thickness is 1.5 mm, current is 10 to 30 kA, energizing time
0.02 to 0.3 seconds. Reference numeral 24 is an AC power source for resistance welding.

Here, since the anti-rotation flange forming material (mounting portion forming material) 15A is welded through the annular bulging portion 21, the welding heat is radiated through the annular bulging portion 21, so that the sleeve is formed. There is almost no risk of the inner peripheral shape of 3 being deformed due to the influence of heat. Further, in the case of pressure welding such as resistance welding, since the pressing direction is the sleeve axial direction and not the sleeve center direction, there is no fear that the sleeve inner peripheral shape will be deformed. Furthermore, since the annular bulging portion 21 itself has a double plate rib structure, there is almost no possibility of deformation.

Further, as the welding means, electron beam welding and laser welding are preferable in addition to the above resistance welding, and a welding means in which the thermal influence during welding is unlikely to spread over a wide range.

(5) The method of the present invention can be applied to a hose intermediate fitting having a bracket 25 at the end of the sleeve 3 as shown in FIG. In this case, the annular bulging portion 27 is formed on the end portion by flare processing, and the bracket forming material 25A which is a mounting portion forming material is attached to the annular bulging portion 25.
Are welded in the same manner as above. At this time, similarly to the above, there is almost no possibility that the inner peripheral shape of the sleeve 3 is deformed due to the influence of heat. In addition, the presence of the annular bulging portion 27 prevents the welding spatter from scattering and adhering to the inside of the sleeve 3.

(6) The hose intermediate fitting thus manufactured is
The hose 1 having the nipple 5 inserted therein is externally fitted with a sleeve 3, and the outer periphery of the sleeve 3 is caulked as shown in the drawing to be fixed to the hose 1. And the mounting portion 15,
The hose 1 is held by a guide at a predetermined position via 17, 25 and the like.

[0021]

According to the method of manufacturing the hose intermediate fitting of the present invention, the outer peripheral portion is caulked for fixing to the hose, and the nipple which is formed separately from the sleeve and is inserted into the hose. A method for manufacturing a hose intermediate fitting having a structure in which a mounting portion forming material for locking or fixing to another member is integrated on the outer circumference of the sleeve, the outer side of the sleeve formed by cutting a pipe. The annular bulging portion is formed by the forming process, and the mounting portion forming material formed by press punching from the plate material is welded to the annular bulging portion, whereby the following actions and effects are achieved.

(1) Since the mounting portion forming material is welded to the annular bulging portion, there is almost no possibility that the inner peripheral shape of the sleeve will be deformed due to the influence of heat during welding. In particular, in the case of pressure welding such as resistance welding, since the pressing direction is the axial direction and not the sleeve center direction, deformation of the sleeve inner peripheral shape is particularly prevented, which is preferable. Further, when the annular bulging portion is formed at the end portion by flare processing and the mounting portion forming material is welded to the annular bulging portion, the annular bulging portion prevents the spatter from scattering and adhering to the inside of the sleeve. It

Therefore, in the hose intermediate fitting manufactured by the method of the present invention, when the hose with the nipple is inserted into the sleeve and the outer circumference of the sleeve is caulked, the workability of hose insertion is reduced, and the outer circumference of the hose is further reduced. There is no danger of scratching the surface.

(2) Further, according to the present invention, since the pipe member in which the sleeve is cut into a predetermined length and the mounting member are manufactured only by pressing, respectively, the cutting is unnecessary and the yield is good. Therefore, it also leads to a reduction in the manufacturing cost of the hose intermediate fitting.

[Brief description of drawings]

FIG. 1 is a schematic process diagram showing a method for manufacturing a hose intermediate fitting of the present invention.

FIG. 2 is a cross-sectional view of the hose intermediate fitting manufactured by the method of FIG.

FIG. 3 is a sectional view showing another example of a hose intermediate fitting manufactured by the method of the present invention.

FIG. 4 is a sectional view showing an example of a hose intermediate fitting manufactured by a conventional manufacturing method.

[Explanation of symbols]

 1 Hose 3 Sleeve 5 Nipple 15 Non-rotating Flange 15A Non-rotating Flange Forming Material (Mounting Part Forming Material) 21 Annular Swelling Part 25 Bracket 25A Bracket Forming Material (Mounting Part Forming Material) 27 Annular Swelling Part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Terumitsu Oshima 1 Nagachihata, Ochiai, Kasuga-cho, Nishikasugai-gun, Aichi Toyoda Gosei Co., Ltd. Toyoda Gosei Co., Ltd.

Claims (1)

[Claims] 1. A sleeve, the outer peripheral portion of which is crimped for fixing to a hose, and a nipple which is formed separately from the sleeve and is inserted into the hose. The outer periphery of the sleeve is locked to another member. Alternatively, it is a method of manufacturing a hose intermediate fitting having a structure in which a mounting portion forming material for fixing is integrally formed, and an annular bulging portion is formed by a forming process on the outside of a sleeve formed by cutting a pipe. A method for manufacturing a hose intermediate fitting, wherein a mounting portion forming material formed by stamping out of a metal plate is welded to the annular bulging portion.