JPS63242431A - Manufacture of hose joint - Google Patents

Abstract

PURPOSE:To reduce a manufacturing cost and to improve the yield by forming a tubular body with the bottom opening one end with the plastic deformation of a metal blank stock and after flattening the bottom part side face, piercing a through hole and fixing the nipple subjected to drawing to the opening end as well. CONSTITUTION:The tubular body 24 having an opening end part 22 and bottomed end part 23 is formed in advance with the plastic work of a plate like metal blank stock to manufacture a nipple 7 by drawing a separate plate like metal blank stock. After forming the flattened part having both side faces by leaving a space in the center by pressing the side face of the bottom 23 of the tubular body 24, a core 26a is blanked by inserting it into the through hole 8. The nipple 7 separately formed is fixed by inserting to the inner side of the sleeve 2 of the tubular body. Since the tubular body 24 and nipple 7 are manufactured with plastic working only without any machining and a joint is formed by fixing both, the prepg. cost is reduced and the yield is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a hose joint, and more specifically, the present invention relates to a method for manufacturing a hose joint, which has a good yield, has a substantially constant wall thickness, is easy to bend, and can be easily bent even when bent. The present invention relates to a method of manufacturing a hose joint in which it is easy to ensure the necessary cross-sectional area of the liquid passage hole.

[Prior Art] As shown in FIG. 16, a conventional hose joint includes a base portion 1' having a through hole 8' into which a bolt is inserted, and an intermediate portion 12' of the base portion 1'. A nipple 7' that communicates with the liquid passage hole 13- is provided at one end of the booth 12' and into which a hose is inserted, and a nipple 7' that is provided coaxially with the nipple 7' on the M base 1' and is inserted into the nipple 7-. A sleeve 2' is known which is crimped so as to press against the outer peripheral surface of the hose. As this hose fitting.

Usually, as shown in FIG. 16, the cross-sectional area of the liquid passage hole 13- provided in the intermediate part 12- of the base 1' is approximately the same as the cross-sectional area of the liquid passage hole 14' of the nipple 7'. .

The above-mentioned hose fittings can be manufactured by cutting a predetermined material into #A shape, or by welding two semicircular bodies with semicircular cross sections to each other to manufacture a hose fitting. It has been known.

[Problems to be Solved by the Invention] The method of manufacturing a hose joint by cutting has a poor yield and is expensive. Further, in the method of manufacturing a hose joint by welding the semi-annular bodies to each other, the reliability of the welded portion may not always be sufficient.

In addition, when bending the hose joint shown in FIG. 16 manufactured by the above two methods in a predetermined direction, the bending part of the hose joint (the part corresponding to the intermediate part 12' of the base 1-) must be bent. It was not bent at a sharp angle so as not to narrow the cross-sectional area of the hole 13'.

The present invention has been made in view of the above-mentioned points of view, and has a low processing load (high yield), can be made light, has a nearly constant wall thickness, and can be easily bent and formed. It is an object of the present invention to provide a method for manufacturing a hose joint, which makes it easy to secure the required cross-sectional area of a liquid hole.

[Means for Solving the Problems] The method for manufacturing a hose joint of the present invention is to plastically deform a metal material so that the open end becomes a sleeve and the bottomed end becomes the back head of the base. A first step of manufacturing the bottom tubular body, and a second step of flattening both sides by pressing the bottom side surfaces of the tubular body manufactured in the first step and leaving a space in the center.
a third step of punching out the central part of the flattened both sides to form a through hole into which a bolt is inserted; and a third step of punching out the central part of the flattened both sides to form a through hole into which a bolt is inserted, and forming a liquid passage hole coaxially with the open end on the open end side of the tubular body. and a fourth step of fixing the nipple having a shape.

The metal material used in the first step may be a plate-shaped body, a thick angular body, a columnar body, a lump-like body, or the like.

[Example] The present invention will be explained below using specific examples.

This embodiment relates to a method of manufacturing a so-called eye joint shown in FIGS. 5 and 6.

(1) Production of a tubular body with 6 holes and an open bottom at one end First, prepare a metal plate-shaped material 21 shown in Fig. 1, plastically deform it and deep draw it to form a hose joint. In order to correspond to a predetermined shape, a tubular body 24 with an open end and a bottom, as shown in FIG. 2, was manufactured, with the open end 22 serving as a sleeve and the bottomed end 23 serving as the head of the base.

Next, as shown in FIG. 3, the tubular body 24 was pressed against the bottom side surfaces thereof to flatten both side surfaces 25 while leaving a space in the center.

Next, a core of a predetermined shape is inserted into the flattened tubular body as shown in FIG. 4, and the center portions of both flattened sides 25 are punched to form a through hole into which a bolt is inserted. 8 was formed.

As a result, a tubular body having a through hole 8 and a bottom with an opening at one end was manufactured.

(2) Nipple manufacturing method.

The nipple used in this example was manufactured as follows.

First, as shown in FIG. 9, a flat metal material 31 was prepared. This was plastically deformed and deep drawn as described in (1) above to form a cylindrical nipple body portion 32 with an opening later formed at the tip as shown in FIG.

Next, as shown in FIG. 11, the peripheral edge of the material that continues to the other end of the nipple body portion is further plastically deformed in the opposite direction and drawn, thereby forming the nipple body portion 32.
forming a cylindrical intermediate outer cylinder part 33 coaxial with the nipple body part 32 and covering the nipple body part 32 on the outer periphery of the nipple body part 32;
Furthermore, by drawing in the same direction, a nipple body portion 32 corresponding to the nipple shape shown in FIG. 12 and an outer cylinder portion 34 integrally formed on the outer periphery of the nipple body portion 32 were manufactured.

Then, as shown in FIG. 13, a hole is made in the center of the cylindrical nipple body to provide a liquid passage hole 35, and the end of the cylindrical outer cylinder part 34 is shaped into a predetermined shape. Amputated. In this way, a nipple 7 consisting of a cylindrical nipple main body 6 having a liquid passage hole 35 and a cylindrical outer cylinder portion 4 was manufactured.

(3) Method for manufacturing eye joint As shown in FIG. 6, the nipple 7 manufactured as described above is inserted into the sleeve 2 of the tubular body having the through hole 8 manufactured as described above. A nipple 7 having a liquid passage hole was fixed to the open end side coaxially with the open end to produce an eye joint.

As shown in FIG. 7, in this joint, after the hose 9 is inserted between the nipple 7 and the sleeve 2, the sleeve 2 is caulked so that the outer cylindrical portion 4 of the nipple 7 and the sleeve 2 are separated. It will be completely attached and fixed.

In addition, as shown in FIG.
0 degrees, even after bending, the middle part 1 of the base 1 of the eye joint
Since the cross-sectional area of the liquid passage hole 13 in the curved portion corresponding to 2 is about 5 to 20 times larger than the cross-sectional area of the liquid passage hole 14 of the nipple 7, liquid passage is not hindered. Also, when the hose 9 is inserted between the nipple 7 and the sleeve 2 and the sleeve 2 is then caulked as shown in Fig. 7,
The sleeve 2 and the outer cylindrical portion 4 of the nipple 7 are in close contact with each other, so that the nipple 7 is firmly fixed and the hose 9 can be prevented from being manipulated.

In the above-mentioned manufacturing method, it is possible to manufacture an eye joint of approximately the same thickness from a plate-shaped body by a simple method of plastic deformation, and the yield is also better than that of cutting.

Embodiment 2 This embodiment relates to a method for manufacturing an eye joint in which the nipple 7 shown in FIGS. 14 and 15 is fixed to the sleeve 2 by bulge processing.

FIG. 14 shows a plan view of the eye joint manufactured according to this example, and FIG. 15 shows a longitudinal cross-sectional view thereof. Similar to the first embodiment, the eye joint includes a base 1a having a through hole 8a into which a bolt is inserted, a sleeve 2a, and a nipple 7a.

The method for producing a tubular body with an open end and a bottom, which has a through hole 8a into which a bolt is inserted and whose open end becomes the sleeve 2a and whose bottom end becomes the base 1a, is the same as in the case of Example 1 above. It is. Note that a bulge portion is provided at a predetermined position of this tubular body by a method of pressing from the axial direction, so that a bulge can be processed.

In this embodiment, the nipple is formed by drawing from a plate and consists of a cylindrical nipple body 71 and a flange part 72 that is integrally formed on the other end side of the nipple body 71 and fixed to the inner peripheral surface of the sleeve. produced something.

The nipple 7a was fixed to the inner peripheral surface of the sleeve 2 by inserting the flange portion 72 of the nipple 7a into the bulge portion and pressing the bulge portion laterally from the outside. Further, as for this bulge processing, the flange portion can also be fixed to the inner circumferential surface of the sleeve by pressing the bulge portion not in the lateral direction but in the centripetal direction.

Also in the eye joint of this embodiment, the intermediate portion 12a of the base portion 1a
The cross-sectional area of the liquid passage hole 13a is the liquid passage hole 14a of the nipple 7a.
Since the cross-sectional area is larger than the cross-sectional area of , it has the same effect as the first embodiment.

In this invention, 1. The embodiments are not limited to those shown in the above-described specific embodiments, and various modifications may be made within the scope of the present invention depending on the purpose and use.

That is, not only the case where the cross-sectional area of the liquid passage hole in the middle part of the base is about 5 to 20 times the cross-sectional area of the nipple as in the above embodiment, but also the case where the cross-sectional area of the liquid passage hole in the middle part is about 5 to 20 times that of the nipple. It can be made larger than the cross-sectional area of the liquid passage hole. Further, the ratio of the cross-sectional areas can be freely set depending on the degree to which the bottom side surface of the tubular body manufactured in the first step is pressed.

[Effects of the Invention] The method for manufacturing a hose joint of the present invention is to plastically deform a metal material to produce a bottomed tubular body with one end open, where the open end becomes a sleeve and the bottomed end becomes the head of the base. The first step to produce
a second step of pressing the bottom side surfaces of the tubular body produced in the first step to flatten both side surfaces with a space left in the center; and a second step of flattening both side surfaces of the tubular body produced in the first step, a third step of punching out a through hole into which a bolt is inserted;
The method is characterized by comprising a fourth step of fixing a nipple portion to the open end side of the tubular body.

Therefore, according to the present manufacturing method, compared to the process of making the base and sleeve using the conventional cutting method, it is cheaper, easier to process, and has a better yield. In addition, according to this manufacturing method, the load for bending and forming is small, so bending and forming is easy.Furthermore, even if the hose joint is bent greatly, it is easy to secure the necessary amount of cross-sectional area of the liquid passage hole. Joints can be manufactured. Moreover, according to this manufacturing method, at least the wall thickness of the base and the sleeve can be made substantially constant.

[Brief explanation of the drawing]

FIG. 1 is an explanatory sectional view of a metal plate material used in Example 1. FIG. 2 is an explanatory sectional view of a tubular body having an open end and a bottom, in which the material shown in FIG. 1 is plastically deformed so that the open end becomes a sleeve and the bottomed end becomes the head of the base. Third
This figure is a perspective view showing a state in which the bottom side side surface of the tubular body shown in FIG. 2 is pressed to flatten both side surfaces. FIG. 4 is an explanatory sectional view showing a state in which the center portions of both flattened sides are punched out. FIG. 5 is a plan view of the hose joint manufactured in Example 1. FIG. 6 is a longitudinal sectional view of the hose joint shown in FIG. 5. FIG. 7 is an explanatory sectional view showing the state after the hose is inserted into the hose joint shown in FIG. 6 and crimped. FIG. 8 is an explanatory sectional view showing the hose joint shown in FIG. 6 in a bent state. FIG. 9 is an explanatory cross-sectional view of a flat metal material for making a nipple in Example 1. FIG. 10 is an explanatory sectional view showing a state in which a cylindrical nipple main body portion is formed by plastically deforming the flat material shown in FIG. 9. FIG. FIG. 11 is an explanatory sectional view showing an intermediate state in which the peripheral edge of the cylindrical nipple body shown in FIG. 10 is drawn. FIG. 12 is an explanatory sectional view showing a state in which the state shown in FIG. 11 is further drawn to form a cylindrical outer cylinder portion that covers the nipple body portion. 13th
The figure is an explanatory cross-sectional view of the nipple manufactured in Example 2, showing the state after a hole is made in the center of the cylindrical nipple body shown in FIG. 12 and the end of the outer cylinder part is cut off. 14th
The figure is a plan view of a hose joint manufactured in Example 2. FIG. 15 is a longitudinal sectional view of the hose joint shown in FIG. 14. FIG. 16 is an explanatory longitudinal sectional view of a conventional hose joint. 1...Base 2...Sleeve 3...Joint body 4...Outer cylinder part 5...Bottom 6...Nipple body 7...Nipple 8...Through hole 9...
・Hose 11... Head 12... Middle part 13... Liquid passage hole in the middle part 13... Nipple liquid passage hole 21.31... Plate-shaped material 22... Opening end 23... Bottomed end portion 24.
...Tubular body 25...Both sides 32...Nitsbur main body part 33...Intermediate outer cylinder part 34...Outer cylinder part 35.
...Liquid port Figure 1 Figure 2 Figure 3 Figure 9 Figure 10

Claims (3)

[Claims] (1) A first step of plastically deforming a metal material to produce a tubular body with an open end at one end, where the open end becomes a sleeve and the bottom end becomes the head of the base; A second step of flattening both side surfaces by pressing the bottom side surfaces of the manufactured tubular body leaving a space in the center, and punching out the center of both flattened side surfaces and inserting bolts into them. a third step of forming a through hole, and a fourth step of fixing a nipple having a liquid passage hole coaxially with the open end of the tubular body. manufacturing method. (2) The nipple is formed by drawing the center part of the material,
Thereafter, a cylindrical nipple body with an opening formed at its tip, which is continuous with the other end of the nipple body, is coaxial with the nipple body formed by drawing the peripheral edge of the material, and covers the nipple body. 2. The method of manufacturing a hose joint according to claim 1, which comprises a cylindrical outer cylinder part. (3) Manufacture of a hose joint according to claim 1, in which the nipple comprises a cylindrical nipple body and a flange portion integrally formed on the other end side of the nipple body and fixed to the inner peripheral surface of the sleeve. Method.