JPH0722824B2 - Joint pipe manufacturing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for manufacturing a joint pipe, which is formed by fitting and fixing a metal pipe and a joint fitting.

(Background of the Invention) For example, in a fuel hose for automobiles, a joint pipe consisting of a metal pipe and a joint fitting fitted and fixed to the end is attached to the end of the hose, and the hose is connected via the joint pipe. Are connected.

In this joint pipe, the metal pipe and the joint fitting are fixed to each other by brazing by heating and melting a brazing material (for example, copper material). Conventionally, this brazing work is a brazing material formed in a ring shape in advance. To the end of the metal pipe, and then fit the fitting part of the fitting to the end of the pipe by slightly pushing the ring-shaped brazing material on the end face, and then to the end of the fitting part of the fitting. This is done by heating and melting the brazing material located in contact with the inside of a high temperature furnace. Then, the fitting of the ring-shaped brazing material into the metal pipe and the fitting of the joint metal fitting into the end portion of the pipe are carried out by a worker completely by hand.

(Means for Solving the Problems) The present invention has been made for the purpose of mechanically performing these operations to achieve labor saving and automation. Thus, the device of the present invention is a device for manufacturing a joint pipe in which the end portion of the metal pipe forming the joint pipe and the joint fitting are fitted together, and a brazing material is attached to the fitting portion, The metal pipe has a central hole having a cross-sectional shape corresponding to the cross-sectional shape of the brazing portion, and a supply passage for a wire made of a brazing material is provided in a state of opening at the inner surface of the central hole at a predetermined axial portion of the central hole. A molding die provided, and (b) a core body that is inserted into the center hole and creates a ring-shaped molding space corresponding to the thickness of the wire between the outer peripheral surface of itself and the inner surface of the center hole. (C) The wire is forcibly fed through the supply passage in a state where the core body in the central hole is inserted, and the feeding force causes the wire to wrap around the molding space to form a ring shape. Wire feeding mechanism,
(D) Wire feed amount control means for controlling the feed amount of the wire by the wire feed mechanism, and (e) is pushed axially into the ring-shaped forming space to guide the wire to the inner surface of the central hole in the feed passage. When passing through the opening portion, a cutting means for cutting the ring-shaped formed portion of the wire at the opening portion, and (f) the cut ring-shaped formed body is axially pushed to wait forward. Ring fitting means for fitting into the end portion of the metal pipe, and fitting fitting for fitting the fitting portion of the fitting fitting into the end portion of the metal pipe fitted with the (g) ring shaped body in the axial direction. And (h) position adjusting means for positioning the ring-shaped molded body at a position where it comes into contact with the end face of the fitting portion of the joint fitting, by or separately from the fitting of the joint fitting. Is the gist.

(Operation and Effect of the Invention) As described above, in the device of the present invention, the brazing material is formed into a ring shape from the wire state by using the forming die and the core body, and at the same time, the brazing material is fitted into the end portion of the metal pipe and the succeeding member It was designed to fit a hand fitting to the end of the pipe,
The operation during this period is performed mechanically.

According to the apparatus of the present invention, the work of mounting the brazing filler metal on the fitting portion between the metal pipe and the joint fitting can be automatically performed, so that labor saving and unmanned operation can be achieved and the production efficiency can be improved. You can In addition, since the wire material is used as it is as the brazing material (it is not preformed into a ring shape),
The cost required for the material is also reduced.

(Example) Next, the Example of this invention is described in detail based on drawing.

In FIG. 2, reference numeral 10 denotes a joint pipe fixed to the end of the fuel hose, which is shown here in a semi-finished product state before brazing.

In this figure, 12 is a metal pipe and 14 is a joint fitting.
The joint fitting 14 has a hole 16 for connection and a fitting portion 18, and is fitted to the end of the metal pipe 12 at the fitting portion 18. Then, a brazing filler metal ring molded body 20 is mounted in contact with the end face of the fitting portion 18, and heating of this brazing filler metal is performed.
The metal pipe 12 and the fitting 14 are brazed by the melting.

3 and 4 show that a wire 34 made of a brazing material is formed into a ring shape with respect to the metal pipe 12, the wire 34 is fitted into the end portion of the metal pipe 12, and the joint fitting 14 is attached to the metal pipe.
A device for fitting and assembling at twelve ends is shown. In these figures, 22 is a conveyor for transporting the pipes 12, which conveys the metal pipes 12 along the slope 24, and rotates the rotating body 26 one by one to a standby position 28.
Supply to. Metal pipe 12 set in standby position 28
Is sent to the following station A. Station A
Is a straightening station in which the outer peripheral surface of the end portion of the metal pipe 12 is straightened by a roller 30.

The subsequent station B is a station for forming a wire 34 made of a brazing material wound around the reel 32 into a ring shape while being unwound from the reel 32, and fitting the wire 34 into the end portion of the metal pipe 12. Station C is a station for inspecting whether the ring molded body 20 is properly fitted to the end portion of the metal pipe 12, and the next station D.
Is a station for fitting the fitting 14 into the end of the metal pipe 12, and the following station E is the fitting 14
Is a station for inspecting whether or not it has been fitted properly and carrying it out onto the pallet 36 waiting next to it.

At this station E, a semi-finished product in which a ring molded body 20 made of a brazing material and a joint metal fitting 14 are fitted to the end of the metal pipe 12 is held by a chuck 38 (Fig. 3) and then raised by a cylinder 40. Then, the arm (FIG. 4) 43 is rotated by 90 ° by the motor 42, and the held semi-finished product is placed on the pallet 36.

The transfer of the work from the stations A → B, B → C, C → D, D → E is performed by the transfer device 44. The transfer device 44 has a chuck 46 corresponding to each station and an elevating plate 48 for holding the chuck 46. The elevating plate 48 can be moved up and down by an elevating cylinder 50.
The lifting cylinder 50 is held by a slide body 52, and the slide body 52 extends along the guide rail 54.
The slide cylinder 56 allows the slide movement in the horizontal direction.

As shown in FIG. 4, each of the stations A to E is provided with a pressing cylinder 58. These pressing cylinders 58 are held on one plate 59. These cylinders 58 serve to press the pressing head 64 against the end of the metal pipe 12 held by the V-shaped receiving member 62 as shown in FIG.

1 and 8, FIG. 9, FIG. 10, FIG. 11 and FIG. 11, there is shown a device for molding a wire 34 made of a brazing material into a ring shape and fitting the wire 34 into the end of the metal pipe 12. The configuration is shown.

First, in FIG. 1, reference numeral 60 is a molding die, and this die 60 has a central hole 62 having a circular inner peripheral surface at the center as shown in detail in FIG. 62
A supply passage 64 for the wire 34 is provided in a state of opening at the inner peripheral surface of the wire 34.

Above the molding die 60, a total of six feed rollers 66 are provided in pairs, each pair consisting of three pairs. Each pair of feed rollers
The springs 68 are brought into frictional contact with each other by the elastic force of the spring 68 (see FIG. 7), and the wire 34 is fed downward by its rotation. Spring
68 can adjust its resilience by operating bolts 70 and 72.

As shown in FIG. 8, gears 76 and 78 are fixed to the rear end of the shaft portion 74 of each feed roller 66.
78 mesh with each other. Of these, one of the gears 76 of the lower two-stage roller 66 is meshed with a gear 82 fixedly mounted on the rotating arm 80 as shown in FIG. The feed roller 66 is forcibly rotated.

The end portion of the rotating arm 80 is connected to the cylinder 84 via the connecting member 81, and the arm is operated based on the operation of the cylinder 84.
It is designed to rotate 80 times. A stopper bolt 86 is provided below the connecting member 81. The stopper bolt 86 defines the rotation end of the arm 80, and the operation of the stopper bolt 86 causes the rotation stroke of the arm 80, that is, the feeding stroke. The feed amount of the wire 34 by the roller 66 is controlled.

Regarding the upper roller 66, one of the gears provided at the rear end of the shaft 74 of the roller 66 is meshed with the gear 82 of the other rotating arm 88. This arm 88 is connected to another cylinder different from the above through a connecting member 90.

As shown in FIGS. 10 and 11, the core 94 connected to the cylinder 92 is inserted into the center hole 62 of the molding die 60. This core body 94 has a circular outer peripheral surface,
A ring-shaped molding space 96 is formed between the outer peripheral surface and the inner peripheral surface of the center hole 62 of the molding die. A guide pin 95 to be inserted into the inner surface of the end portion of the metal pipe 12 is provided at the tip of the core body 94.

A cutting pipe 98 is inserted into a molding space 96 between the outer peripheral surface of the core body 94 and the inner peripheral surface of the center hole 62. The cutting pipe 98 is elastically urged backward by a spring 100, and one end of one arm of the lever 102 is brought into contact with the rear end of the cutting pipe 98, and the cutting pipe 98 is rotated by the rotation of the lever 102. , Is pushed out to the left in the figure. The end of the other arm of the lever 102 is the first
As shown in FIG. 0, the cylinder 102 is opposed to the cylinder 104, and the lever 102 is rotated by the cylinder 104.

Next, the operation of this device will be described.

The metal pipe 12 supplied by the conveyor 22 to the standby position 28 is carried by the transfer device 44 to the next station A, where it is supported by the V-shaped receiver 62.
Then, at this station A, the portion of the joint fitting 14 to which the fitting portion 18 is to be fitted is corrected into a perfect circular shape. The metal pipe 12 whose shape has been corrected is carried to the station B by the transfer device 44 in the next operation, in which the wire 34 made of a brazing material is formed into a ring shape and fitted into the end portion of the metal pipe 12. . This operation is performed as follows. That is, the brazing wire wound around the reel 32
34 is forcibly delivered downward by the feed roller 66 (see FIG. 12 (A)). Then, as shown in FIG. 7B, the tip of the ring-shaped molding is formed between the outer peripheral surface of the core body 94 and the inner peripheral surface of the center hole 62 of the molding die 60 through the supply passage 64 of the molding die 60. It is sent to the space 96 and further circulates in the molding space 96 in a circular shape. When the tip of the wire reaches the opening of the supply passage 64 to the inner surface of the central hole 62, that is, when the wire 34 makes one full turn, the supply of the wire 34 by the roller 66 is stopped. The feeding of the wire 34 is stopped by stopping the rotation of the rotating arm 80 by the contact with the stopper bolt 86.

Now, when the wire 34 is formed into a ring shape around the core body 94 (at this time, the core body 94 is in the forward state, and the guide pin 95 has entered the inner surface of the end portion of the metal pipe 12 waiting forward. However, in some cases, the core body 94 may be retracted to the position shown in Fig. 11 and may be moved forward later.) Then, the lever 102 is rotated by the cylinder 104 to disconnect it. The pipe 98 is strongly fed forward. Then, the ring-shaped molded portion of the wire 34 is inserted into the central hole of the supply passage 64.
While being cut at the opening portion to the inner surface of 62, it is pushed out by the tip surface of the cutting pipe 98 to move forward, and is fitted onto the outer peripheral surface of the end portion of the metal pipe 12. When the brazing material ring molding 20 is fitted into the metal pipe 12, the pipe 12
Is again transported by the transfer device 44 to the next station C, where it is inspected whether the ring molding 20 is fitted properly. Subsequently, the metal pipe 12 is carried to the station D, and the fitting 14 which is made to stand by thereat in advance is moved to the chuck 10 as shown in FIG.
It is pushed out by a pushing device 110 having 6 and a pushing cylinder 108, and its fitting portion 18 is fitted into the end portion of the metal pipe 12. At this time, the ring molded body 20 already fitted into the metal pipe 12 is pushed slightly forward by the fitting of the fitting 14 and comes into contact with the tip surface of the fitting portion 18 of the fitting 14 in the final state. . At the station B, the fitting position of the ring-shaped molded body 20 is selected in advance as such.

The workpiece, which has become a semi-finished product due to the fitting of the joint metal fitting 14, is inspected at the next station E to see if the fitting has been carried out properly, and then the pallet of the adjacent pallet is transferred by the delivery device.
36 Handed over. Then, the work placed on the pallet 36 is carried to the inside of the furnace, and brazing is performed by heating and melting the brazing material formed in a ring shape.

As described above, the device of the present example is such that the wire 34 made of a brazing material is formed into a ring shape, and then the ring formed body 20 and the joint fitting are formed.
14 and 16 are mechanically and continuously fitted into the end of the metal pipe 12. This improves the production efficiency of the joint pipe, and according to the device of this example, the brazing material as the raw material may be wire-shaped (need not be formed into a ring shape). The cost required will also be low.

Although the embodiment of the present invention has been described in detail above, this is merely an embodiment, and the present invention is not limited to the joint pipe of the above-exemplified embodiment, but may be applied to other joint pipes or other than the fuel hose. The present invention can be applied to the joint pipe of the present invention, and various modifications can be made based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a front view of a main part of a manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of a joint pipe manufactured by the apparatus in a semi-finished product state, and FIGS. 3 and 4 are the apparatus. 3 is a front configuration diagram and a plan configuration diagram schematically showing the overall configuration of FIG.
FIG. 5 is a perspective view of the pressing cylinder and its peripheral portion in FIGS. 3 and 4, FIG. 6 is a configuration explanatory view of the molding die in FIG. 1, and FIG. 7 is a plan view of a main portion of the feed roller in FIG. It is a figure. FIGS. 8, 9, 10, and 11 are plan sectional views, rear views, and sectional views of the wire forming / pushing device shown in FIG.
FIG. 12 is a side sectional view and a side sectional view of a main part, and FIG. 12 is an explanatory view showing a state of forming a wire by a forming die. 10: Fitting pipe, 12: Metal pipe 14: Fitting metal fitting, 60: Molding die 62: Center hole, 64: Supply passage 66: Feed roller, 76, 78, 82: Gear 80, 88: Rotating arm 84, 104: Cylinder 86 : Stopper bolt 94: Core 96: Molding space 98: Cutting pipe 102: Lever 110: Pushing device

Claims (1)

[Claims] 1. A manufacturing apparatus for a joint pipe in which an end portion of a metal pipe constituting the joint pipe is fitted with a joint fitting, and a brazing material is attached to a fitting portion, wherein: Molding having a central hole having a cross-sectional shape corresponding to the cross-sectional shape of the brazing portion, and a wire supply passage made of a brazing material being provided in a state where the central hole is open to the inner surface of the central hole at a predetermined portion in the axial direction. A die, and (b) a core body that is inserted into the center hole and that creates a ring-shaped molding space corresponding to the thickness of the wire between the outer peripheral surface of itself and the inner surface of the center hole; A wire feeding mechanism for forcibly feeding the wire through the supply passage in a state where the core is inserted in the center hole, and wrapping the wire along the shaping space by the feeding force to form a ring shape. And (d) the wire feed Wire feed amount control means for controlling the feed amount of the wire by the mechanism, and (e) when the wire is pushed axially into the ring-shaped forming space and passes through the opening portion to the inner surface of the central hole in the supply passage of the wire. And a cutting means for cutting the ring-shaped molded portion of the wire at the opening portion, and (f) the cut ring-shaped molded body is axially pushed to the end of the metal pipe waiting in front. Ring fitting means for fitting, (g) fitting fitting means for fitting the fitting part of the fitting in the axial direction with respect to the end of the metal pipe fitted with the ring-shaped molded body, ) Positioning means for positioning the ring-shaped molded body at a position where it comes into contact with the end face of the fitting portion of the joint fitting by fitting the joint fitting or separately therefrom. Pipe manufacturing equipment.