JP4383617B2 - How to make hose fittings - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a hose fitting in which a nipple and a socket are firmly integrated.
[0002]
[Prior art]
Hose fittings are parts that transport fluid under internal pressure. The hose fitting consisting of a nipple and a socket and the hose fitted to it are integrated so that there is no leakage of the fluid used during use. An integrated structure is required.
[0003]
Therefore, the hose fitting is obtained by integrating a nipple and a socket in advance, and the manufacturing method thereof is conventionally as follows.
[0004]
That is, in the state shown in FIG. 7, the socket 2 that has been previously formed into a deep cup shape in a cup shape with respect to the nipple 1 is fixed to the state shown in FIG. As shown in FIG. 10, a socket 2 similar to that in FIG. 7 is sandwiched and fixed as shown in FIG. 10 with a bulge 3 formed on the nipple 1, and further, a fixed portion of the socket 2 with the nipple 1 as shown in FIG. There is a system in which the bottom of the base plate is inclined and fixed as shown in FIG.
[0005]
However, in each of the conventional methods described above, the socket 2 needs to be formed into a deep drawing shape in advance, which increases the number of parts processing steps and increases manufacturing costs, and the socket 2 is matched to the outer diameter size of the nipple 1. Dedicated design was required, the number of products increased, and there was a problem of complicated parts management.
[0006]
As another conventional fixing method, as shown in FIG. 13, a cylindrical socket 2 is swaged in the direction of arrow D from the upper part of the socket 2 with respect to the protrusion or collar 4 formed on the nipple 1. There is also a fixing method as shown in FIG.
[0007]
In this method, a cylindrical socket 2 is used, but it is necessary to previously form a protrusion or collar 4 on the nipple 1, and in order to fix the socket 2 to the nipple 1 in combination with the parts of the collar 4, There was a problem that the cost increased or the number of parts increased.
[0008]
[Problems to be solved by the invention]
According to the present invention, a simple pipe having a predetermined length or a simple pipe having a predetermined length is deformed into a deep drawing shape by simply pressing in the axial direction, and the deformed end of the socket is provided on the outer periphery of the nipple. By fitting and pressing into the annular groove, the socket and nipple are firmly bonded, so that the socket is molded and the hose fitting is assembled at the same time, and the hose fitting with the required strength, structure and function is produced. Provide a method .
[0009]
[Means for Solving the Problems]
The method of manufacturing the hose fitting of the present invention is such that a pipe cut to a predetermined length is protruded from the tip of the punch and is externally fitted to the tip of the punch to be gripped, and a penetration hole having an inner diameter larger than the outer diameter of the nipple is formed. By inserting and fixing a nipple into a clamp at one end, projecting one end of the nipple into the inside of the penetration hole, and penetrating the tip of the pipe together with the tip of the punch into the penetration hole , The pipe tip is guided to the arc surface formed at the bottom of the penetration hole , bent toward the outer circumference of the nipple, the end face of the pipe is pressed against the outer circumference of the nipple, and the pipe is fixed by crimping. formed in, or to manufacture a hose fitting nipple and socket are integrated, the pipe elongated gripping to protrude from the tip of the punch, the penetration hole of the inner diameter larger than the outer diameter of the nipple one A nipple penetrating fixed clamp having a part, is projected to one end of the nipple inside the penetration hole, by penetrating the front end portion of the pipe into the penetration hole, the front end portion of the pipe of the penetration hole Bend in the outer peripheral direction of the nipple by guiding it to the arc surface formed at the bottom , press the end surface of the tip of this pipe against the outer peripheral surface of the nipple and fix it by crimping, then cut the rear end side of the pipe, This pipe is formed into a socket having a predetermined length, and a hose fitting in which the nipple and the socket are integrated is manufactured .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1, 2 and 3 show a first embodiment in which a hose fitting for fixing a socket 2 to a nipple 1 is manufactured by one operation using a pipe 5 which has been cut to a predetermined length in advance.
[0011]
As shown in FIG. 1, a pipe 5 having a length that assumes the length of a socket to be completed is fitted into a punch 6, and a mandrel 8 that penetrates into the nipple 1 is attached to the punch 6, and the mandrel 8 is a stopper behind the mandrel 8. It is stopped by 15.
[0012]
On the other hand, the nipple 1 is inserted and fixed to the clamp 7, and a penetration hole 16 is formed on the punch side of the clamp 7 so that the pipe 5 penetrates to form the socket 2.
[0013]
Accordingly, FIG. 1 shows a state before the punch 6 penetrates into the penetration hole 16 of the clamp 7, and FIG. 2 shows that the punch 6 penetrates into the penetration hole 16 of the clamp 7 by power and is combined with the punch 6. When the pipe 5 enters the penetration hole 16 of the clamp 7 and the tip of the pipe 5 collides with the end of the penetration hole 16, the pipe 5 is guided by the arcuate curved portion 17 of the penetration hole 16, and the tip of the pipe 5 is the nipple 1. A pipe that is bent in the outer peripheral direction and presses the nipple 1 to bend the nipple 1 and the tip of the pipe 5 so that the nipple 1 is integrated becomes a socket 2 to manufacture a hose fitting.
[0014]
In this case, the mandrel 8 that penetrates into the punch 6 and is fixedly penetrates into the nipple 1 together with the movement of the punch 6 to prevent the socket 2 from hitting the nipple 1 and deforming the nipple 1. In the case of processing that does not require the mandrel 8, the mandrel 8 may not be used. Therefore, the mandrel 8 is not essential.
[0015]
Thus, as shown in FIG. 3, the end portion of the socket 2 that is curved with a radius is crimped to the outer periphery of the nipple 1, and a hose fitting in which the nipple 1 and the socket 2 are integrated is manufactured.
[0016]
Next, a second embodiment will be described based on FIG. 4, FIG. 5, and FIG. Although essentially the same as the first embodiment, the first embodiment cuts the pipe 5 that becomes the socket 2 into a predetermined length in advance and then uses this to attach the hose fitting as described above. Whereas the second embodiment uses the long pipe 5 as it is, the long pipe 5 is gripped by the punch 12 and the mandrel 8 as shown in FIG. Similarly, the tip of the long pipe 5 is press-fitted into the penetration hole 16 of the clamp 7 and is guided by the arcuate curved portion 17 in the penetration hole 16 by the pressing force, so that the tip of the pipe 5 is a nipple. The nipple 1 is bent by pressing the nipple 1 by bending in the outer peripheral direction, and the pipe integrated with the nipple 1 by bending the tip of the pipe 5 becomes a socket 2 to manufacture a hose fitting. The long pipe 5 is cut at a portion S as shown in FIG.
[0017]
【The invention's effect】
According to the manufacturing method of the hose fitting of the present invention described above, if the outer diameter and the wall thickness of the socket are the same, it is possible to cope by adjusting only the cutting length of the socket regardless of the nipple size. Management costs can be reduced by reducing the variety of sockets .
[0019]
On the other hand, in the conventional fixing of the socket and nipple by eight-side or six-side crimping, the outer periphery of the socket is crimped with eight or six claws, so that a small gap is generated between the claws and hits the outer periphery of the nipple. An equal crimping force does not act on the inner circumference of the socket hole.
[0020]
As a result, when corrosive liquid is loaded from the outside, such as salt spray, under the operating atmosphere conditions, the external corrosive liquid enters from the inner surface of the socket hole where no uniform crimping force is applied, and corrodes the nipple or socket hole. However, in the present invention, the socket is firmly bonded to the nipple with a uniform crimping force in the circumferential direction. Intrusion can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view of a main part of a partial cross-section of a state before fixing a pipe of a socket material to a nipple for explaining a process in an embodiment of a method for manufacturing a hose fitting of the present invention.
FIG. 2 is a side view of a partial cross section of the socket and nipple fixed in a state following FIG. 1;
3 is a side view of a partial cross section of a hose fitting made of a socket and a nipple following FIG. 2. FIG.
FIG. 4 is a side view of an essential part of a partial cross-section of a state before fixing a long pipe of a socket material to a nipple for explaining a process in another embodiment of the method of the present invention.
FIG. 5 is a side view of a partial cross section of the socket and the nipple fixed after FIG. 4;
6 is a side view of a partial cross section of a hose fitting including a socket and a nipple following FIG. 5. FIG.
FIG. 7 is a side view of a partial cross section in a state before a socket and a nipple are fixed by caulking in a conventional example.
8 is a side view of a partial cross-section after fixing in FIG. 7;
FIG. 9 is a side view of a partial cross section in a state before the socket is fixed by being sandwiched between bulges formed in a nipple in a conventional example.
10 is a side view of the partial cross section after fixing in FIG. 9;
FIG. 11 is a side view of a partial cross section in a state before the socket is fixed to the nipple by pushing the socket in the axial direction in the conventional example.
12 is a side view of a partial cross-section after fixing in FIG. 11;
FIG. 13 is a side view of a partial cross section in a state before the socket is fixed to the nipple by caulking through the collar in the conventional example.
14 is a side view of a partial cross-section after fixing in FIG. 13;
[Explanation of symbols]
1 Nipple 2 Socket 5 Pipe 6 punch
7 Clamp 10 Hose fitting 12 Punch 16 Penetration hole 17 Arc surface

Claims (3)

A pipe cut to a predetermined length is protruded from the tip of the punch and gripped by being externally fitted to the tip of the punch, and the nipple is inserted into a clamp having an insertion hole with an inner diameter larger than the outer diameter of the nipple at one end. The end of the nipple protrudes into the inside of the penetration hole, and the tip of the pipe penetrates into the penetration hole together with the tip of the punch. Bend to the outer circumference of the nipple by guiding it to the formed arc surface, press the end face of the end of this pipe against the outer circumference of the nipple, and fix it by crimping. This pipe is formed in the socket, and the nipple and socket are integrated. To make hose fittings. A long pipe is protruded from the tip of the punch and gripped, and the nipple is inserted and fixed to a clamp having an insertion hole with an inner diameter larger than the outer diameter of the nipple at one end, and one side of the nipple is placed inside the insertion hole. By projecting the end portion and penetrating the tip portion of the pipe into the penetration hole, the tip portion of the pipe is guided to the arc surface formed at the bottom portion of the penetration hole and bent toward the outer periphery of the nipple. The end face of the tip is pressed against the outer peripheral surface of the nipple and fixed by crimping, then the rear end of the pipe is cut, this pipe is formed into a socket of a predetermined length, and the hose in which the nipple and socket are integrated How to make hose fittings to make fittings. The method for manufacturing a hose fitting according to claim 1 or 2, wherein a mandrel is inserted into the pipe held by the punch .

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