JPH0796344A - Apparatus for production of intermediate fitting of liquid pressure hose - Google Patents

Abstract

PURPOSE:To lessen the deformation resistance of a material and to improve workability in a flanging section as the temp. of the quinary blank of an unequal thickness working section rises up to a hot region by continuously working the blank from a cutting section to an unequal thickness working section. CONSTITUTION:This apparatus consists of a fixed machine bed 2 and a moving ram 3 which is arranged to face this machine bed and moves forward and backward of the machine bed 2. The apparatus is successively and continuously juxtaposed with a cutting section, an end face working section 5, a first blind hole working section 6, a second blind hole working section 7, a bulging section 8, an unequal thickness working section 9 and a flanging section 10, by which a multistage type former is constituted. Cylindrical parts maintained with the continuous state of fiber flow are formed on both end sides of a primary blank by the first and second blind hole working sections 6, 7 and the fiber flow is maintained in nearly the straight state by the bulging section 8. A taper surface which hardly generates plastic flow is formed in the intermediate bulging part. The intermediate bulging part is unequally bulged in one direction by the unequal thickness working section 9 and is shifted into the warm region by the flanging section 10, by which the blank is molded while the deformation resistance thereof is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate metal fitting for connecting a brake hose for an automobile, which is an intermediate metal fitting for a hydraulic hose adapted to manufacture an asymmetrical component having a flange-like mounting piece protruding in one direction. The present invention relates to a metal fitting manufacturing device.

[0002]

2. Description of the Related Art Conventionally, an intermediate metal fitting a of this type is shown in FIG.
As shown in FIG. 2, a flange portion c (substantially triangular and oval) projecting in one direction from the shaft body b is integrally formed, and a conducting pipe e is inserted and fixed in the hollow portion d of the shaft body b. Then, the brake hose g is inserted into the annular hole f of the intermediate metal fitting a, the shaft body b of the insertion member is crimped to connect the brake hose g, and the collar metal fitting c is used to connect the intermediate metal fitting a to an appropriate portion of the vehicle. Is fixed and a brake hose g is provided.

However, due to the asymmetrical shape of the intermediate metal fitting a, as shown in FIG. 17, the bar-shaped material h is upset in multiple stages to form a header j having a conical flange i, After forming, annealing, pickling, bondage, etc. are performed, then press forming is performed as shown in Fig. 18, unnecessary collar portions k are deburred, and both ends of the shaft body b are cut and hollowed. A portion d is formed, a conduction pipe e is inserted into the hollow portion d, and the conduction pipe e is fixed by brazing in a vacuum furnace.

However, in such a manufacturing method,
Since the weight of the unnecessary collar portion k is approximately 58% with respect to the weight of the material h, the yield of the material is poor and the upsetting ratio of the material is high. Therefore, upsetting is performed under excessive conditions. As a result, a cut portion is generated in the fiber flow of the internal structure, the strength of the collar portion c is reduced, and the work hardening rate is increased due to the multistage upsetting, so that it can withstand press forming in the next step. Although cracks will occur if the annealing process is not performed until decarburization to make the state, however, since the annealing is under the excessive conditions as described above, a decarburized layer is formed, and the decarburized layer reduces quality. It has a drawback.

Further, since the processing method is changed from the forging process to the cutting process, it takes time and labor to change the material setup, and at the cutting process, both end sides of the shaft b are machined to form the hollow portion d. Since it is formed, it has a drawback that the material loss is large even after this processing and the yield of the material is further deteriorated.

Further, since the bonding process is performed after the header j is formed, when the conductive pipe e is brazed in the vacuum furnace, the bond material adhered to the inner wall of the vacuum furnace enters into the conductive pipe e and becomes conductive. It had the drawback of plugging the holes.

[0007]

SUMMARY OF THE INVENTION The present invention is an intermediate metal fitting for connecting a hydraulic hose, which simplifies the manufacture of an asymmetrical product having a flange-like mounting piece protruding in one direction, and is still working. It is intended to provide an apparatus for manufacturing an intermediate metal fitting in a hydraulic hose which has a good fiber flow in order to improve the quality and eliminate the cutting process to reduce the material cost yield.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems such as low material yield and low strength based on the above-mentioned prior art.
First and second bottomed hole processing section, bulging processing section, uneven thickness processing section,
Flanged parts are connected in series to maintain a continuous fiber flow, and the upright molding moves to a warm region to reduce deformation resistance and improve workability, resulting in a flange shape protruding in one direction. It is an object of the present invention to solve the above-mentioned drawbacks by providing an apparatus for manufacturing an intermediate fitting in a hydraulic hose, which is characterized in that an asymmetrical product having a mounting piece is simply manufactured by forging.

The apparatus for manufacturing an intermediate fitting in a hydraulic hose according to the present invention will be described below in which a first and a second bottomed hole processing section, a bulging processing section, an uneven thickness processing section, and a flange processing section are connected in series and rearward extrusion molding is performed. The expansion molding, the uneven thickness expansion molding, and the upsetting molding are continuously performed.

Further, the second and third movable molds and the second and third fixed molds of the first and second bottomed hole forming parts form the bottomed hole-shaped cylindrical parts on both ends of the rod-shaped primary material. Also, a tertiary material is inflated and filled into a cavity formed by the dies on the opposite ends of the fourth movable die and the fourth fixed die of the swelling portion to form the solid portion into a truncated spindle shape.

Also, in the uneven thickness processing portion, in the cavity formed by the fifth movable die and the fifth fixed die, the abutting portion of both dies is made to face and molding is performed in the third step. The quaternary material is housed so that the taper surface on the side of the fourth movable die in the intermediate bulging portion is positioned, and the intermediate bulging portion is bulged in one direction to form the bulging flange portion. It is made of the following materials.

Further, in the flanging portion, the intermediate bulge portion and the uneven thickness brim portion of the quinary material are attached to the flange-shaped mounting piece in the cavity formed by the sixth movable die and the sixth fixed die. To form a sixth-order material.

[0013]

In the present invention, the first and second bottomed hole forming portions are formed with cylindrical portions on both ends of the primary material in which a continuous state of fiber flow is maintained, and the bulging processing portion is provided with a fiber portion. The flow is maintained in a substantially straight line, and a tapered surface is formed in the intermediate bulging portion so that plastic flow does not easily occur in the bulging processing portion, and the uneven thickness processing portion is provided at the contact portion with the die in the cavity. When the intermediate bulging portion is housed so that the tapered surface of the intermediate bulging portion is positioned so as to bulge in such a manner that the intermediate bulging portion is unevenly bulged in one direction, the flow from the abutting portion to the outside is eliminated and burr is generated. It is suppressed and is transferred to the warm region in the flanging portion, and the deformation resistance of the material is reduced to form.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, in which 1 is an apparatus for manufacturing an intermediate fitting in a hydraulic hose according to the present invention, and the manufacturing apparatus 1 is a machine base 2 to be fixed.
And a moving ram 3 that is arranged to face the machine base 2 and moves back and forth to the machine base 2, and includes a cutting processing portion 4, an end surface processing portion 5, a first bottomed hole processing portion 6, and a second bottomed hole processing. The portion 7, the bulging portion 8, the uneven thickness portion 9, and the flange portion 10 are successively arranged side by side to form a multistage homer.

It is to be noted that a processing material is held between adjacent processing sections by a chuck having an appropriate mechanism, and is transferred to and transferred to the next processing section.

The cutting section 4 cuts the linear material W into a predetermined length to form a rod-shaped primary material W1, and a line guide 11 for guiding the linear material W is provided on the machine base 2. A fixed cutter 12 is provided on the tip opening side of the line guide 11, and a movable cutter 13 is arranged on the side of the tip opening of the one line guide 11 so as to cross the tip opening.

Next, the end surface processing section 5 is for correcting both end surfaces of the primary material W1 and comprises a first movable die 14 provided on the movable ram 3 and a first fixed die provided on the machine base 2. The first mold 16 is composed of 15 and dies 17, 18 are provided on opposite ends of the first movable mold 14 and the first fixed mold 15, respectively.

The punch 1 is inserted into the die 17 of the first movable die 14 and presses the primary material W1 in the die 17.
9, a knockout 20 for pushing out the punch 19, a knockout pin 21 are provided, and a receiving pin 22 that is inserted into the die 18 in the first fixed die 15 and abuts against the end of the primary material W1 in the die 18. , The primary material W1 through the receiving pin 22
There is a knockout 23 that pushes out.

Next, the first bottomed hole processing part 6 is made of the primary material W1.
One end side of which is extruded rearward, and a second movable die 24 provided on the moving ram 3 and a second fixed die 25 provided on the machine base 2 constitute a second die 26. Second mobile type
A punch 27 for pressing one end side of the primary material W1 is provided at 24, a die 28 is provided at the end side of the other second fixed die 25 facing the second moving die 24, and the die is inserted into the die 28.
In addition, a knockout pin 29 is provided that abuts against the end of the secondary material W2 in the die 28 and pushes it out.

Next, the second bottomed hole machining portion 7 is made of the secondary material W2.
The other end side of the moving ram 3
The third movable die 30 provided on the machine base 3 and the third fixed die 31 provided on the machine base 2 constitute a third die 32, and one third movable die 30 has the other end side of the secondary material W2. A punch 33 that presses is provided, a die 34 is provided on the other end of the third fixed die 31 that faces the third movable die 30, and the die 34 is inserted into the die 34 and the secondary material W2 in the die 34 A receiving pin 35 that is inserted into and abuts the cylindrical portion B on one end side is provided, and a knockout sleeve 37 that has a cylindrical portion 36 having the same diameter as the cylindrical portion B is provided.

Reference numeral 38 in the drawing denotes a knockout pin for pushing out the tertiary material W3 in the die 34 through the knockout sleeve 37.

Next, the bulging portion 8 is used to bulge and mold the solid portion A of the tertiary material W3. The bulging portion 8 is provided with the fourth movable die 39 provided on the movable ram 3 and the fourth movable die provided on the machine base 2. Four fixed type
The fourth mold 41 is composed of 40, the fourth movable mold 39 and the fourth fixed mold.
Dies 42 and 43 are provided on opposite ends of 40, respectively, and quaternary material W is formed by the dies 42 and 43 as shown in FIGS. 6 and 9.
A cavity 44 corresponding to the outer shape of the intermediate bulging portion C formed in the truncated spindle shape in 4 is formed.

Further, the fourth movable die 39 is provided with a punch 45 which is inserted into the die 42 and is inserted and pressed into the cylindrical portion B1 of the tertiary material W3 in the die 42 and has the same diameter as the cylindrical portion B1. A knockout sleeve 47 having a cylindrical portion 46 is provided, and a knockout pin 48 for pushing out the quaternary material W4 in the cavity 44 via the knockout sleeve 47 is provided.

Further, the fourth fixed die 40 is provided with a receiving pin 49 which is inserted into and abuts against the cylindrical portion B of the tertiary material W3, and a knockout sleeve 51 having a cylindrical portion 50 having the same diameter as the cylindrical portion B is provided. There is.

In the figure, 52 is a quaternary material W in the cavity 44.
It is a knockout pin that pushes out 4.

Next, the uneven thickness processed portion 9 is formed by bulging the intermediate bulging portion C of the quaternary material W4 in one direction to form the quintic material W5 having the uneven thickness flange portion D. , A fifth movable die 53 provided on the movable ram 3 and a fifth fixed die provided on the machine base 2.
The fifth mold 55 is composed of 54, the fifth movable mold 53 and the fifth fixed mold.
Dice 56 and 57 are provided on opposite ends of 54, respectively, and the dies 56 and 57 form a cavity 58 corresponding to the outer shape of the uneven thickness flange portion D of the fifth material W5 shown in FIGS. 7 and 9. There is.

Further, as the cavity 58, an intermediate bulge portion C formed in a truncated spindle shape in the quaternary material W4 shown in FIG.
The quaternary material W4 can be housed so that the taper surface C1 on the side of the fourth movable die 39 of the first movable die 53 faces the contact portion 59 between the die 56 of the fifth movable die 53 and the die 57 of the fifth fixed die 54. , The space 60 is defined in that place.

That is, the height dimension X of the intermediate bulging portion C formed in the truncated spindle shape in the quaternary material W4 is compared with the height dimension Y of the intermediate portion E including the uneven thickness collar portion D of the quintic material W5. However, by making it small, the tapered surface C1 is arranged to face the contact portion 59 of the fifth movable die 53 and the fifth fixed die 54 as described above.

In the fifth movable die 53, the punch pressure plate 61 is fixed to the movable ram 3, a cylindrical housing 62 is fixedly mounted on the punch pressure plate 61, and the movable housing is accommodated in the housing 62.
63 is slidably inserted, a concave groove 64 for restricting a sliding stroke is formed in the moving housing 63, and a ball 65 whose end is engaged with the concave groove 64 is fixed to the housing 62. There is.

Reference numeral 66 denotes a compression spring that elastically presses downward when the movable housing 63 is in a free state. The compression spring 66 exerts a predetermined elastic force so as to restrict the upward return even when it is forged. Have

A punch 67 is inserted into the cylindrical portion B1 of the quaternary material W4 in the cavity 58 and pressed. The punch 67 is housed in the movable housing 63 and inserted into the die 56.

In the figure, reference numeral 68 denotes a knockout sleeve, and the knockout sleeve 68 has a cylindrical portion 69 having the same diameter as the cylindrical portion B1 of the quaternary material W4, and the knockout pin 70 serves to fix the quintic material W5 of the cavity 58. I try to push it out.

The fifth fixed die 54 is provided with a receiving pin 71 which is inserted into the cylindrical portion B of the quaternary material W4.
A knockout sleeve 73 having a cylindrical portion 72 having the same diameter as the cylindrical portion B is provided.

Reference numeral 74 in the drawing denotes a knockout pin for pushing out the fifth material W5 in the cavity 58 via the knockout sleeve 73.

Next, the flanging portion 10 is formed into a sixth material W6 having a flange-shaped mounting piece G which makes the uneven thickness flange portion D of the fifth material W5 into a substantially triangular shape in a plan view or an oval shape in a plan view. And the sixth movable die 75 provided on the moving ram 3 and the sixth fixed die 76 provided on the machine base 2
77 is provided, and dies 78 and 79 are provided on opposite ends of the sixth movable die 75 and the sixth fixed die 76, respectively, and the attachment pieces of the sixth material W6 shown in FIGS. 8 and 9 are provided by the dies 78 and 79. A cavity 80 corresponding to the outer shape of G is formed.

Further, the sixth moving die 75 has a receiving pin 81 inserted into and abutting on the cylindrical portion B1 of the quintic material W5, and a knockout sleeve 83 having a cylindrical portion 82 having the same diameter as the cylindrical portion B1, and the knockout sleeve. Cavity 80 through 83
A knockout pin 84 for pushing out the sixth material W6 therein is provided.

Further, the sixth fixed mold 76 has a receiving pin 85 which is inserted into the cylindrical portion B of the quintic material W5 and is in contact therewith, and a knockout sleeve 8 having a cylindrical portion 86 having the same diameter as the cylindrical portion B.
7. A knockout pin 88 for pushing out the sixth material W6 in the cavity 80 through the knockout sleeve 87 is provided.

Next, the apparatus for manufacturing the intermediate fitting in the hydraulic hose according to the present invention will be explained. The linear material W is intermittently projected from the tip end of the line guide 11 by a constant dimension by a linear feed mechanism (not shown). When the movable cutter 13 which is fed to the side of the wire guide 11 is moved so as to cross the tip opening of the line guide 11, the linear material W is fixed by the fixed cutter 12 provided at the tip opening of the line guide 11. Then, the rod-shaped primary material W1 is cut into pieces, and the primary material W1 is held by a chuck and transferred into the die 18 of the first fixed die 15 of the end face processing section 5 which is the next step.

Next, in the end face processing section 5, the first movable die 14 is moved forward to be pushed by the punch 19 while the primary material W1 is accommodated in the dies 17 and 18 of the first die 16. Both end surfaces of the primary material W1 are corrected, and then the first movable die 14 is retracted, and the knockout pin 21 and the knockout 23 are operated to push out the primary material W1 in the dies 17 and 18, and the primary material W1 is removed. The die 28 of the second fixed die 25 of the bottomed hole drilling portion 6 which is the next process after being held by the chuck
Transfer inside.

Next, in the first bottomed hole machining section 6, the second movable die is used.
By advancing 24, the punch 27 is press-fitted into the primary material W1 and is extruded rearward to form a secondary material W2 in which a cylindrical portion B having a bottomed hole is formed in the relevant portion, and then the second movable die. Knockout pin 29 with retracting 24
Secondary material W2 that has been molded from the die 28 by operating the
And the secondary material W2 is held by a chuck and transferred into the die 34 of the third fixed die 31 of the second bottomed hole machining portion 7 which is the next step.

Next, in the second bottomed hole machining section 7, the third movable die is used.
When the punch 30 is moved forward, the punch 33 is press-fitted into the other end of the secondary material W2 and is extruded rearward in the die 34 so that the cylindrical material B3 having a bottomed hole is diametrically formed at the relevant portion. Then, the third movable die 30 is retracted, and the knockout sleeve is inserted through the knockout pin 38.
Tertiary material W that is formed from die 34 by operating 37
3, the third material W3 is held by a chuck, and the die for the fourth fixed die 40 of the bulging portion 8 which is the next step is held.
Transfer to 43.

Next, in the swelling process section 8, the fourth movable die 39 is moved forward so that the punch 45 inserts it into the cylindrical part B1 of the tertiary material W3 and presses it, and the solid part A of the tertiary material W3 is die 42. , 43 to form a quaternary material W4 in which an intermediate bulge portion C having a truncated spindle shape is formed by bulging and molding so as to fill the cavity 44, and then the fourth movable die 39 is formed. Retract and actuate knockout sleeve 47 via knockout pin 48, and knockout pin 52
Activate the knockout sleeve 51 via the dice 4
The quaternary material W4 that has been formed and processed from Nos. 2 and 43 is extruded, and the quaternary material W4 is held by a chuck and transferred into the die 56 of the fifth fixed die 54 of the uneven thickness processing portion 9 which is the next step.

In such a state, the fiber flow in the intermediate bulging portion C of the quaternary material W40 is substantially linear.

Next, in the uneven thickness processing portion 9, the fifth movable die 53 is moved forward to move the fifth fixed die 54 to the movable housing of the fifth movable die 53.
63 is brought into contact with the cavities with dies 56 and 57.
Block 58.

In this state, as shown in FIG. 12, the quaternary material W4 is positioned so that the tapered surface C1 of the intermediate bulging portion C of the quaternary material W4 faces the contact portion 59 with the dies 56 and 57. W
4 are accommodated.

Then, the punch pressure plate 61 is moved forward and the punch 67 presses the quaternary material W4 to flow outward from the cylindrical portion C2 of the intermediate bulging portion C where plastic flow easily occurs, and the die 56 is pressed. , 57, the state where the flow from the contact portion 59 to the outside is suppressed, that is, as clearly shown by the fiber flow in FIG. 10, the flow state in the vicinity of the tapered surface C1 is almost linear. It is recognized that the unevenness is caused to flow, and in this state, the intermediate bulging portion C of the quaternary material W4 is bulged in one direction to fill the cavity 58 and form the unequal thickness flange portion D. With the material W5, the fifth movable die 53 is subsequently retracted, the knockout sleeve 68 is operated via the knockout pin 70, and the knockout sleeve 73 is operated via the knockout pin 74, and the cavity 58 is formed.
The fifth material W5 that has been further formed is extruded, and the fifth material W5 is held by a chuck and transferred into the die 79 of the sixth fixed die 76 of the flange processing section 10 which is the next step.

Next, in the flanging section 10, the sixth movable die 75
By pushing the receiving pin 81 into the cylindrical portion B1 of the quintic material W5 and the receiving pin 85 into the cylindrical portion B of the quintic material W5 to bring them into contact with each other and press the quintic material W5. The upholstered material W6 is formed by upsetting so as to fill the cavity 80 formed by the above, and the mounting piece G is formed. After that, the sixth movable die 75 is retracted and the knockout pin 84 is inserted. The knockout sleeve 83 is actuated and the knockout sleeve 87 is actuated via the knockout pin 88 to extrude the molded sixth material W6 from the dies 78 and 79.

Then, the sixth material W6 is deburred by press deburring, subjected to a predetermined surface treatment to form an intermediate metal fitting 89, and then connected to a communicating hole 90 formed in the center of the partition wall F of the intermediate metal fitting 89. A conducting pipe body 93 in which a pipe 92 is hung vertically on a mounting plate 91 is coaxially inserted into the cylindrical portion B and the cylindrical portion B1, and the mounting plate 91 of the conducting pipe body 93 is attached to the bottoms of the cylindrical portion B and the cylindrical portion B1. Spot weld.

Then, the brake hose 94 is inserted into the cylindrical portion B and the cylindrical portion B1 of the intermediate fitting 89, and then the cylindrical portion B and the cylindrical portion B1 are caulked to connect the brake hose 94.

As described above, the cutting processing section 4 to the uneven thickness processing section 9
As the fifth material W5 of the uneven thickness processed portion 9 rises in temperature to a warm region by continuous processing up to, the deformation resistance of the material is reduced and the workability in the flange processed portion 10 is improved. You can

[0051]

In summary, the present invention provides a machine base 2 and the machine base 2
Has a movable ram 3 that is moved back and forth in front of
In a multi-stage homer in which fixed dies and movable dies are arranged in parallel on the movable ram 3 and the material is pressed by each die,
A first bottomed hole processing portion 6 in which one end side of the rod-shaped primary material W1 is extruded rearward by the second movable die 24 and the second fixed die 25;
Since the third movable die 30 and the third fixed die 31 are provided with the second bottomed hole processing portion 7 for extruding the other end side of the secondary material W2 backward, the backward extrusion is performed on both end sides of the rod-shaped primary material W1. Since the cylindrical parts B and B1 having a bottomed hole shape can be formed by molding to form the tertiary material W3, the conventional cutting process can be eliminated, and the cylindrical parts B and B1 are formed by backward extrusion molding. By maintaining the continuous state of fiber flow at such points,
The brake hose 94 can be inserted into 89 to improve the strength when crimped.

Further, since the bulging portion 7 is formed by forming the truncated spindle-shaped cavity 44 by the dies 42 and 43 provided on the opposite ends of the fourth movable die 39 and the fourth fixed die 40, respectively. , Forming a truncated spindle-shaped intermediate bulge C to form a quaternary material W4
In addition to being able to maintain the fiber flow of the truncated spindle-shaped portion of the intermediate bulge C in a substantially straight line state,
A taper surface C1 is formed on the intermediate bulging portion C, and the taper surface C1 can be a portion where plastic flow is unlikely to occur in the next step.

Further, cavities 58 corresponding to the outer shape of the uneven thickness flange portion D projecting in one direction are formed by the dies 56 and 57 provided at the opposite ends of the fifth movable die 53 and the fifth fixed die 54, respectively. In addition, in the cavity 58, the taper surface C1 on the fourth movable die 39 side of the intermediate bulging portion C of the quaternary material W4 formed in the bulging processing portion 8 is the contact portion between the dies 56 and 57. Since the uneven thickness processed portion 9 is provided so as to face the 59, the intermediate bulging portion C is unevenly bulged in one direction to form the uneven thickness flange portion D.
When molding, it is possible to suppress the generation of burrs by eliminating the flow from the contact part 59 to the outside, and to prevent burring as in the past, it is necessary to increase the size of the mold etc. accompanying high pressure molding. There is no need to take any measures, and since the fiber flow can be maintained in a continuous state as shown in FIG. 10, the strength of the mounting piece G in the intermediate metal fitting 89 can be stabilized.

Further, according to the outer shape of the mounting piece G, which has a substantially triangular shape in plan view or an oval shape in plan view, by the dies 78 and 79 provided on the opposite ends of the sixth movable die 75 and the sixth fixed die 76, respectively. Since the flanged portion 10 formed by forming the cavity 80 is provided, by continuing to the third step as described above, since it shifts to the warm region in this step, it is not necessary to perform the bonder treatment as in the conventional case. In addition, since the deformation resistance of the material is reduced, it is possible to perform upsetting when molding the mounting piece G, and it is possible to improve workability by significantly reducing the pressing area compared to the conventional pressing area. I can.

Therefore, when the brake hose g is connected as in the conventional case, the conducting pipe e is not brazed in advance in the vacuum furnace, and the cylindrical portion B formed on the intermediate metal fitting 89 is simply used.
It is possible to spot weld the conductive pipe 93 to B1 (it cannot be spot welded if it has been subjected to a bonder process)
Therefore, the manufacturing cost can be reduced, and the bonder material enters the conduction pipe e in the vacuum furnace as in the conventional case.
It is possible to eliminate the problem of closing the conduction pipe e,
Therefore, it is possible to manufacture an intermediate metal fitting in a hydraulic hose that not only achieves good quality (strength, etc.) but also significantly improves the material cost yield and reduces the cost, which is a great practical effect.

[Brief description of drawings]

FIG. 1 is a schematic view of an apparatus for manufacturing an intermediate fitting in a hydraulic hose according to the present invention.

FIG. 2 is a cross-sectional view of a main part of a cutting and processing unit that constitutes the above manufacturing apparatus.

FIG. 3 is a cross-sectional view of an essential part of an end face processing part that constitutes the same manufacturing apparatus.

FIG. 4 is a cross-sectional view of an essential part of a first bottomed hole processing part that constitutes the same manufacturing apparatus.

FIG. 5 is a cross-sectional view of an essential part of a second bottomed hole processing part that constitutes the same manufacturing apparatus.

FIG. 6 is a cross-sectional view of an essential part of a bulging processing portion that constitutes the same manufacturing apparatus.

FIG. 7 is a cross-sectional view of a main part of an uneven thickness processing portion that constitutes the same manufacturing apparatus.

FIG. 8 is a cross-sectional view of a main part of a flange processing section that constitutes the same manufacturing apparatus.

FIG. 9 is a diagram showing a processing material in each step of the intermediate fitting in the hydraulic hose.

FIG. 10 is a diagram showing a fiber flow of a quintic material.

FIG. 11 is a diagram showing a fiber flow of a sixth material.

FIG. 12 is an enlarged cross-sectional view showing the relationship between the taper surface on the fourth movable die side in the intermediate bulging portion of the quaternary material and the contact points between the fifth movable die and the fifth fixed die in the fifth die. Is.

FIG. 13 is a cross-sectional view of an intermediate fitting.

FIG. 14 is a cross-sectional view showing a state where a brake hose is inserted in the intermediate fitting.

FIG. 15 is a perspective view of an intermediate metal fitting having an oval-shaped mounting piece in plan view.

FIG. 16 is a perspective view of an intermediate fitting having a mounting piece that is substantially triangular in a plan view.

FIG. 17 is a process drawing of cold forging in a conventional forming method.

FIG. 18 is a process drawing of press forming and cutting after cold forging in a conventional forming method.

[Explanation of symbols]

 2 Machine stand 3 Moving ram 6 First bottomed hole processing part 7 Second bottomed hole processing part 8 Bulging processing part 9 Uneven thickness processing part 10 Flange processing part 24 Second moving type 25 Second fixed type 30 Third movement Mold 31 Third fixed mold 39 Fourth movable mold 40 Fourth fixed mold 42 Die 43 Die 44 Cavity 53 Fifth movable mold 54 Fifth fixed mold 56 Die 57 Die 58 Cavity 59 Abutment site 75 Sixth movable mold 76 Sixth Fixed type 78 dies 79 dies 80 cavities

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area F16L 33/00 33/28

Claims (1)

[Claims] 1. A machine base and a movable ram that is moved back and forth in front of the machine base, and a die for making a fixed mold and a movable mold face the machine base and the movable ram are arranged in parallel, and each mold is provided. In a multi-stage homer that presses the material by using a second movable die and a second fixed die, a first bottomed hole processing part that extrudes one end side of the rod-shaped primary material backward, and a third movable die and a third fixed die With a second bottomed hole processing part for extruding the other end of the secondary material backward.
A bulging part formed by forming a truncated spindle-shaped cavity by dies provided on the opposite ends of the fourth movable die and the fourth fixed die, and the opposite ends of the fifth movable die and the fifth fixed die. The cavities corresponding to the outer shape of the uneven thickness flange portion projecting in one direction are formed by the dies respectively provided on the sides, and the cavity is formed at the first bulge portion of the intermediate material of the quaternary material formed by the bulge processing portion. By the uneven thickness processing part where the tapered surface which is the four movable die side can be accommodated so as to face the abutting parts of both dies, and the dies which are respectively provided on the opposite end sides of the sixth movable die and the sixth fixed die. An apparatus for manufacturing an intermediate metal fitting in a hydraulic hose, characterized in that a flanged portion formed by forming a cavity corresponding to an outer shape of a mounting piece having a substantially triangular shape in a plan view or an oval shape in a plan view is connected.