JPH0829391B2 - Manufacturing method for hose fittings - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a socket portion connected to a hydraulic hose such as a brake hose, a connecting shaft portion, and a cylindrical spectacle portion connected to a fluid device. The present invention relates to a method for manufacturing a hose mouth fitting for a fluid conduit, which has a structure in which a pipe is inserted in the section.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a hose fitting having a socket portion, a connecting shaft portion, and a spectacle portion, first, the spectacle portion is molded, and then the socket portion having a shaft body in the center portion is molded. After that, a shaft hole was drilled in the central portion of the shaft body of the socket portion and the central portion of the connecting shaft portion to manufacture the fitting main body.

[0003]

In the above method for manufacturing the hose mouth fitting, the molding device for the socket portion becomes complicated, and
Since the shaft hole is drilled, there are problems that the accuracy of the shaft hole is lowered and the management means for ensuring the accuracy of the shaft hole is complicated. An object of the present invention is to solve the above problems.

[0004]

According to the present invention, when a hose fitting is manufactured, a shaft portion and a bottomed cylindrical socket portion are concentrically connected to each other, and a portion near the connection portion between the shaft portion and the socket portion is provided. After molding a molding material in which a pipe mounting hole is provided in the center of the shaft, a part of the shaft part is compressed and deformed in the axial direction to form a substantially spherical shape connected to the socket part via a connection shaft part. Forming a bulging portion having a shape, and then plastically deforming the bulging portion by press working to form a spectacle processing portion having a pair of end faces parallel to the axis of the socket portion; A mounting hole having an axis perpendicular to both end faces is punched in the spectacles processing part to form a spectacle part, and then a communication hole for communicating the inside of the socket part with the inside of the mounting hole is provided in front of the pipe mounting hole. After making the mouthpiece body by drilling, place the inner end of the pipe in front. Characterized in that it secured to the port fitting body is fitted into the pipe mounting hole.

[0005]

[Function] The shaft portion and the socket portion are concentrically connected to each other, and a part of the shaft portion of the molding material in which the pipe mounting hole is formed in the central portion near the connection portion of the shaft portion and the socket portion is in the axial direction thereof. By compressing and deforming to form a substantially spherical bulging portion, the bulging portion is pressed and plastically deformed to form a glasses processing portion having a pair of end faces parallel to the axis of the socket portion. Mold. A mounting hole is punched in this spectacle processing portion to form a spectacle portion, and then a communication hole for communicating the inside of the socket portion and the inside of the spectacle portion is bored ahead of the pipe mounting hole to manufacture a mouthpiece body. The inner end of the pipe inserted into the socket portion of the mouthpiece body is fitted into the pipe mounting hole and fixed to the mouthpiece body to produce a hose mouthpiece.

[0006]

Since the present invention is configured as described above, it is possible to simplify the molding process of the socket portion and reduce the manufacturing cost of the hose base, and to form the pipe mounting hole when molding the molding material. By doing so, it is possible to improve the dimensional accuracy of the pipe mounting hole, and improve the mounting accuracy of the pipe to the mouth fitting body to improve the dimensional accuracy of the hose mouth fitting. Further, since the communication hole is formed after forming the pipe mounting hole, it is possible to expand the control limit of the dimensional accuracy of the communication hole.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS. A hose mouth fitting K for a hydraulic conduit is formed by a mouth fitting body 1 and a small-diameter pipe 2 inserted in the center of the mouth fitting body 1, and the mouth fitting body 1 is connected to a hose. A cylindrical spectacle part 4 having a bottomed cylindrical socket part 3 and a mounting hole 4a having an axis b orthogonal to the axis a of the socket 3 and fastened and coupled to a hydraulic brake or the like. And a connecting shaft portion 5 which is concentrically connected to the socket portion 3 and connects the socket portion 3 and the eyeglass portion 4, and the socket portion 3 at the center near the connecting portion between the socket portion 3 and the connecting shaft portion 5. A pipe mounting hole 6 which is concentrically recessed and into which the pipe 2 is fitted, and the pipe mounting hole 6
And a communication hole 7 is formed at the tip of the.

A pair of end faces 8, 8 parallel to the axis a of the socket 3 and the connecting shaft 5 are provided on the eyeglass part 4 of the mouthpiece body 1.
Are formed, and a plurality of rows of circular grooves 9 are concentrically formed in the both end surfaces 8 respectively.

The forming material 10 for producing the mouthpiece body 1 of the hose mouthpiece K is formed by homer-forming a plastically deformable metal material such as mild steel, aluminum or alloy by cold forming. 10 is socket 3
And a shaft portion 11 having an axis center concentric with the shaft center a of the socket part 3 and connected to the center part of the inner wall 3a of the socket part 3, and a center near the connection part between the socket part 3 and the shaft part 11. A socket 3 and a pipe mounting hole 6 which is concentrically recessed are formed in the portion.

As the forming material 10, a columnar metal material obtained by cutting a wire is set in a die hole of a die and pressed by a first punch, and the shaft portion 1 is placed below the metal material on the die side.
1 is formed, and then the upper part of the metal material is formed with a pin-shaped protrusion for forming the pipe mounting hole 12 at the tip.
It is manufactured by a homer process in which the socket 3 is formed by punching the socket 3 and the pipe mounting hole 12 is drilled in the center of the inner wall 3a of the socket 3 and the inner end of the shaft 11.

When the mouthpiece body 1 is formed by using the molding material 10 as a base material and the pipe 2 is joined to the mouthpiece body 1 to manufacture the hose mouthpiece K, first, the shaft portion 1 of the molding material 10 is formed.
The shaft portion 11 is pressed in the axial direction by an upsetting die having a hemispherical molding surface while sandwiching the vicinity of the inner end of 1 between a pair of split dies having a hemispherical molding surface. The bulging portion 15 having a substantially spherical shape is formed by axially compressively deforming the vicinity of the outer end of the portion 11, and the socket portion 3 and the bulging portion 15 are integrally connected via the connecting shaft portion 5 Molded product A1
Is prepared.

Next, the bulging portion 15 of the intermediate molded product A1 is pressed by a pair of molds of a rehetter to be plastically deformed, and 1
A plurality of concentric circular grooves 9 having a pair of parallel end faces 8
Then, a spectacle processing section 17 in which both circular grooves 9 and concavities 16 in the shape of round holes concentric with the circular grooves 9 are provided on both end surfaces 8 is formed by a rehetter.

Next, the concave portion 16 of the eyeglasses processing portion 17 of the intermediate molded product A2 in which the eyeglasses processing portion 17 is formed is pressed by a punch of a press molding machine so that the eyeglasses processing portion 17 has an axial center perpendicular to both end faces 7. The pilot hole 18 having b is punched out, and the inner wall surface of the pilot hole 18 is finished by a punch of a press molding machine to punch the attachment hole 4a to mold the eyeglass portion 4.

Further, the intermediate molded product A3 having the spectacles portion 4 formed therein is subjected to a cutting process so that the inside of the pipe mounting hole 6 and the mounting hole 4 are mounted.
A communication hole 7 that communicates with the inside of a is formed in the tip of the pipe mounting hole 6 concentrically with the pipe mounting hole 6 to manufacture the fitting main body 1.

Next, the pipe 2 is inserted into the central portion of the socket portion 3 of the fitting main body 1, the inner end of the pipe 2 is fitted into the pipe mounting hole 6 and fixed to the fitting main body 1 by brazing. The hose fitting K can be manufactured.

Next, the operation and effect of the embodiment having the above configuration will be described. In this example, when manufacturing the hose mouth fitting K, the shaft portion 11 and the bottomed cylindrical socket portion 3 are concentrically connected to each other, and a pipe mounting hole is formed in the central portion near the connection portion between the shaft portion 11 and the socket portion 3. After molding the molding material 10 in which 6 is recessed, a part of the shaft part 11 is compressed and deformed in the axial direction to be bulged in a substantially spherical shape connected to the socket part 3 via the connection shaft part 5. The portion 15 is formed, and then the bulging portion 15 is plastically deformed by press working so that the axial center a of the socket portion 3 is formed.
The eyeglasses processing part 17 having a pair of end surfaces 8 parallel to the eyeglasses processing part 17 is formed, and then the mounting hole 4a having the axis b perpendicular to the both end surfaces 8 is punched in the eyeglasses processing part 17 to form the eyeglasses part 4. Then, a communication hole 7 that connects the inside of the pipe mounting hole 6 and the inside of the mounting hole 4a is bored ahead of the pipe mounting hole 6 to produce the mouthpiece body 1, and then the inner end of the pipe 2 is It is configured to be fitted into the pipe mounting hole 6 and fixed to the mouthpiece body 1.

For this reason, the manufacturing process of the socket body 3 can be simplified to reduce the manufacturing cost of the base body 1, and the pipe mounting hole 12 can be formed when the molding material 10 is molded.
By forming the above, it is possible to improve the dimensional accuracy of the pipe mounting hole 12, and also improve the mounting accuracy of the pipe 2 to the mouth fitting body 1 to improve the dimensional accuracy of the hose mouth fitting K. Moreover, since the communication hole 7 is formed after the pipe mounting hole 12 is formed, the control limit of the dimensional accuracy of the communication hole 7 can be expanded.

Further, in this example, since the circular grooves 9 are concentrically recessed in both end faces 8 of the spectacle part 4 of the mouthpiece body 1, both end faces 7 of the spectacle part 4 are firmly attached to their mounting surfaces or washers. Can be pressed into contact with the
It is possible to prevent oil from leaking from the gap between the both end surfaces 8 and the mounting surface thereof.

Next, in the hose mouth fitting K of the second embodiment shown in FIGS. 8 to 13, the plane shape of the eyeglass portion 4A of the mouthpiece body 1A is substantially square and the eyeglass portion 4A is formed in a square trapezoid. The outside is formed similarly to the hose fitting K of the first embodiment.

The spectacle portion 4A of the mouthpiece body 1A has a bulge portion of the intermediate molded product A1 having a bulge portion 15 formed by compressively deforming a part of the shaft portion 11 of the mouthpiece body molding material 10. 15 is plastically deformed by pressing to form a square trapezoidal eyeglass-processed portion 17A, and the eyeglass-processed portion 17A is formed by punching out a mounting hole 4a having an axis b perpendicular to both end surfaces 8A thereof. .

Next, in the hose mouth fitting K of the third embodiment shown in FIGS. 14 to 20, the mouth fitting main body 1B is concentrically connected to the spectacle portion 4 on the side opposite to the connecting shaft portion 5. The hose cap K of the first embodiment is formed in the same manner as the hose cap K except that the protruding portion 20 is formed.

When manufacturing the fitting main body 1B having the protruding portion 20, the molding material 10B having the protruding portion 20 formed in a stepped shape at the tip of the shaft portion 11B is used as a base material, and the shaft portion 11B is pressed in the axial direction. As a result, a part of the shaft portion 11B is compressed and deformed in the axial direction to form a bulging portion 15 that bulges between the protruding portion 20 and the shaft portion 5, and thereafter, the fitting main body 1B is formed in the same manner as in the first embodiment. To make.

The operations and effects of the second and third embodiments are the same as those of the first embodiment, and the description thereof will be omitted.

[Brief description of drawings]

FIG. 1 is a side sectional view of a molding material according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of an intermediate molded product showing a state where a bulged portion is molded in the same manner.

FIG. 3 is likewise a side sectional view of an intermediate molded product showing a state where a spectacle processing portion is molded.

FIG. 4 is likewise a side sectional view of the intermediate molded product showing a state where the lower hole is punched out.

FIG. 5 is likewise a side sectional view of the intermediate molded product showing a state in which the mounting hole is molded.

FIG. 6 is a side sectional view of a fitting main body and a pipe.

FIG. 7 is a side sectional view of the hose fitting of the first embodiment.

FIG. 8 is a plan view of an intermediate molded product of the second embodiment.

9 is a sectional view taken along line X1-X1 of FIG.

FIG. 10 is a plan view of the mouthpiece main body of the second embodiment.

11 is a sectional view taken along line X2-X2 of FIG.

FIG. 12 is a plan view of a hose fitting according to a second embodiment.

13 is a sectional view taken along line X3-X3 of FIG.

FIG. 14 is a side sectional view of a molding material according to a third embodiment.

FIG. 15 is a side sectional view of an intermediate molded product showing a state in which a bulged portion is molded in the same manner.

FIG. 16 is likewise a side sectional view of an intermediate molded product showing a state where a spectacles processing part is molded.

FIG. 17 is likewise a side sectional view of the intermediate molded product showing a state where the lower hole is punched out.

FIG. 18 is likewise a side sectional view of the intermediate molded product showing a state in which the mounting hole is molded.

FIG. 19 is likewise a side sectional view of the fitting main body and the pipe.

FIG. 20 is a side sectional view of a hose fitting according to a third embodiment.

[Explanation of symbols]

 1, 1A, 1B Mouthpiece body 2 Pipe 3 Socket part 4, 4A Glasses part 5 Connecting shaft part 6 Pipe mounting hole 7 Communication hole 8, 8A End face 9 Circular groove 10, 10B Molding material 11, 11B Shaft part 15 Swelling part 17 Glasses processing section K Hose fitting

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-139247 (JP, A) JP-A-63-235039 (JP, A) JP-A-4-4940 (JP, A) JP-A-1- 228632 (JP, A) JP-A-4-344847 (JP, A) JP-A-60-26876 (JP, A) JP-A-2-34227 (JP, A) JP-A-2-46392 (JP, A)

Claims (1)

[Claims] 1. A molding material in which a shaft portion and a bottomed cylindrical socket portion are concentrically connected to each other, and a pipe mounting hole is recessed in a central portion near a connection portion between the shaft portion and the socket portion. After molding, a part of the shaft part is compressed and deformed in the axial direction to form a substantially spherical bulging part connected to the socket part through a connecting shaft part, and then the bulging part is formed. The portion is plastically deformed by press working to form a spectacles working portion having a pair of end faces parallel to the axis of the socket portion, and then,
A mounting hole having an axis perpendicular to the both end faces is punched in the eyeglass processing portion to form an eyeglass portion, and then a communication hole for communicating the inside of the socket portion and the inside of the attachment hole is formed at the end of the pipe mounting hole. A method of manufacturing a hose mouth fitting, comprising: making a mouth fitting main body by punching into a pipe, and fitting the inner end of the pipe into the pipe mounting hole to fix the hose fitting main body.