KR20170002096U - Apparatus of molding for branch type pipe, method of molding for branch type pipe and branch type thereof - Google Patents

Abstract

The present invention relates to a bifurcated pipe forming apparatus, a bifurcated pipe forming method, and a bifurcated pipe formed thereby. According to an embodiment of the present invention, there is provided a bifurcated pipe forming apparatus for forming a branch pipe by plastic deformation of a part of a pipe, the bifurcated pipe forming apparatus comprising: a lower mold; An upper mold for defining a cavity in which the pipe is seated together with the lower mold and forming a branch pipe forming hole communicating with the cavity; A pair of feeding punches for pressing both ends of the pipe seated inside the cavity; A pair of holders for sealing both ends of the cavity; A fluid supply unit for supplying a fluid with a predetermined pressure to the inside of the pipe which is seated inside the cavity; A counter punch which forms a through hole at a tip end of a part of the pipe protruding into the branch pipe forming hole; And a heating unit for heating a part of the pipe protruding into the branch pipe forming hole; .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of forming a branched pipe, a method of forming a branched pipe, and a method of manufacturing the same,

The present invention relates to a bifurcated pipe forming apparatus, a bifurcated pipe forming method, and a bifurcated pipe formed thereby.

The branched pipe is for distributing the fluid in two or more directions, and is often formed in a T shape or a Y shape. Generally, a T-shaped or Y-shaped bifurcated pipe is manufactured by a hydroforming method. In the hydroforming method, when a fluid is supplied to the interior of the pipe at a predetermined pressure after the pipe is placed inside the mold, a part of the pipe is plastically deformed into the branch pipe in the shape of a molding hole formed in the mold by the pressure of the fluid A bifurcated pipe is produced.

However, in this conventional technique, since a part of the pipe is plastically deformed by the pressure of fluid supplied to the inside of the pipe, when the rigidity of the material of the pipe is large, the pressure of the fluid provided for plastic deformation must be increased, Damage due to local elastic deformation of the pipe during plastic deformation may be a concern. Further, in the prior art, sufficient plastic deformation can not be ensured due to work hardening in a part of the pipe subjected to plastic deformation, or damage due to an increase in hardness during use may be a problem.

1. Prior Art Patent Document 1 Korean Patent Laid-Open Publication No. 2013-0038635 (titled "T-type connector manufacturing apparatus using hydroforming method and manufacturing method of T-shaped connector using the same) 2. Prior Art Patent Document 2 Korean Patent Laid-Open Publication No. 2014-0134356 (name: Branching tube forming method for air conditioner installation using a hydroforming method and branch tube formed by the above method)

It is an object of the present invention to provide a bifurcated pipe forming apparatus and method for manufacturing a bifurcated pipe more efficiently.

Another object of the present invention is to provide a bifurcated pipe forming apparatus and a forming method that are configured to prevent work hardening in a forming process.

According to an aspect of the present invention, there is provided a bifurcated pipe forming apparatus for forming a branch pipe by plastic-deforming a part of a pipe, the apparatus comprising: Lower mold; An upper mold for defining a cavity in which the pipe is seated together with the lower mold and forming a branch pipe forming hole communicating with the cavity; A pair of feeding punches for pressing both ends of the pipe seated inside the cavity; A pair of holders for sealing both ends of the cavity; A fluid supply unit for supplying a fluid with a predetermined pressure to the inside of the pipe which is seated inside the cavity; A counter punch which forms a through hole at a tip end of a part of the pipe protruding into the branch pipe forming hole; A heating unit for heating a part of the pipe protruding into the branch pipe forming hole; And a heat shielding portion for shielding heat generated during the induction heating of a portion of the pipe protruding into the branch pipe forming hole by the heating portion. .

In one embodiment of the branched pipe forming apparatus according to the embodiment of the present invention, the heating section induces and heats a part of the pipe protruding into the branch pipe forming hole by receiving current.

In an embodiment of the branched pipe forming apparatus according to the embodiment of the present invention, electric current is supplied to the heating unit before or at the same time as fluid is supplied to the inside of the pipe by the fluid supply unit.

In one embodiment of the branched pipe forming apparatus according to the embodiment of the present invention, the frequency of the current supplied to the heating unit varies depending on the material of the pipe.

According to an embodiment of the present invention, there is provided a method of forming a bifurcated pipe using the apparatus for forming a bifurcated pipe according to claim 1, wherein the pipe comprises a pipe A seating step S10; (S20) for pressing both ends of the pipe and supplying the fluid to the inside of the pipe so that the feeding punch and the fluid supply unit are formed by plastic deformation of a part of the pipe and protruding into the branch pipe forming hole; And a punching step (S30) of forming the through-hole at the tip of the pipe protruding into the branch pipe forming hole of the counter punch; And in the pipe deformation step (S20), the heating unit heats a part of the pipe protruding into the branch pipe forming hole.

In one embodiment of the method for forming a branched pipe according to the embodiment of the present invention, the heating unit applies a current at least simultaneously with the start of the pipe deformation step (S20) or the pipe deformation step (S20) A part of the pipe protruding into the inside of the hole is heated by induction.

Another aspect of the method for forming a bifurcated pipe according to an embodiment of the present invention is the method for forming a bifurcated pipe by using the apparatus for forming a bifurcated pipe according to claim 1, wherein: the pipe comprises a pipe A seating step S10; (S21) a step of applying power to a heating part to which a current is applied; Wherein the feeding punch comprises: a pipe pressing step (S22) for pressing both ends of the pipe; A fluid supply step (S23) of supplying the fluid with a predetermined pressure into the inside of the pipe; And a punching step (S30) of forming the through-hole at the tip of the pipe protruding into the branch pipe forming hole by the pressurization by the feeding punch and the fluid supplied by the fluid supply part, And a part of the pipe protruding into the branch pipe forming hole is heated by the heating unit.

In another aspect of the branched pipe forming method according to the embodiment of the present invention, the heating unit power applying step (S21) is performed before the pipe pressing step (S22) and the fluid supplying step (S23) ) And the fluid supply step (S23).

An embodiment of the branched pipe according to the embodiment of the present invention is formed by the method of forming a branched pipe according to any one of claims 5 to 8.

According to the embodiments of the present invention, the following effects can be expected with the use of the bifurcated pipe forming apparatus, the bifurcated pipe forming method, and the bifurcated pipe thus formed.

In the embodiment of the present invention, a part of the pipe which is plastically deformed into the branch tube forming hole is heated by the heating part. Therefore, in the embodiment of the present invention, it is possible to more easily form even a pipe having a relatively high rigidity.

Further, in the embodiment of the present invention, work hardening of the pipe is prevented in the molding process by heating by the heating portion. Therefore, according to the embodiment of the present invention, it is possible to secure a sufficient amount of plastic deformation of the pipe, and to prevent a problem caused by an increase in the hardness of the pipe.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing a branched pipe forming apparatus according to a first embodiment of the present invention; Fig.
Fig. 2 is a view showing a branch pipe forming apparatus according to a second embodiment of the present invention; Fig.
3 is a work flow diagram showing a step of molding a bifurcated pipe according to an embodiment of the present invention.
FIGS. 4 to 6 are working state diagrams showing a process of molding a bifurcated pipe according to an embodiment of the present invention.

Hereinafter, a branched pipe forming apparatus according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a block diagram showing a branched pipe forming apparatus according to a first embodiment of the present invention; FIG.

1, the branched pipe forming apparatus 1 according to the present embodiment includes a branch pipe 11 (see Fig. 6) by plastically deforming a part of the pipe 10 (see Figs. 5 and 6) . The branch pipe forming apparatus 1 includes a lower mold 100, an upper mold 200, a pair of feeding punches 300, a pair of holders 400, a fluid supply unit 500, a counter punch 600, And a heating unit 700.

More specifically, the lower mold 100 and the upper mold 200 define a cavity C in which the pipe 10 is seated. The upper mold 200 may be vertically movable with respect to the lower mold 100 so that the pipe 10 can be seated substantially inside the cavity C. [ In the upper mold 200, a branch pipe forming hole 210 is formed. The branch tube forming hole 210 may be formed through the upper mold 200 so as to communicate with the cavity C.

The feeding punch 300 presses both ends of the pipe 10, which are seated inside the cavity C. [ Although not shown, a driving unit for driving the feeding punch 300 may be provided.

The holder 400 shields both ends of the cavity C. For example, the holder 400 may be formed separately from the feeding punch 300 and fixed to the feeding punch 300, respectively, or formed integrally with the feeding punch 300.

Meanwhile, the fluid supply unit 500 supplies the fluid to the inside of the pipe 10, which is seated inside the cavity C, at a predetermined pressure. The fluid supply unit 500 is configured to supply fluid to the interior of the pipe 10 that is seated inside the cavity C through the fluid supply pipe 510 passing through the feeding punch 300 and the holder 400. [ Can be supplied.

Further, the counter punch 600 may be configured to press the feeding punch 300 and press the pipe (not shown) protruding into the branch pipe forming hole 210 by the fluid supplied at a preset pressure by the fluid supplying part 500. [ A through hole is formed at the tip of a part of the base 10. For this, the counter punch 600 may be movably installed in the branch pipe forming hole 210.

In the present embodiment, the heating unit 700 serves to heat a part of the pipe 10 protruding into the branch pipe forming hole 210. This is to improve workability in the process of plastic deformation of a part of the pipe 10 and protruding into the branch pipe forming hole 210. Particularly, in the present embodiment, the heating unit 700 receives a current and induction-heats a part of the pipe 10 protruding into the branch pipe forming hole 210. At this time, the heating unit 700 receives a current before or at least simultaneously with the fluid being supplied to the inside of the pipe 10 by the fluid supply unit 500. The frequency of the current supplied to the heating unit 700 may be varied to induce heating of the pipe 10 according to the material of the pipe 10.

Hereinafter, a bifurcated pipe forming apparatus according to a second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a view showing a configuration of a branched pipe forming apparatus according to a second embodiment of the present invention. The same components as those of the first embodiment of the present invention described above are referred to with reference to FIG. 1, and a detailed description thereof will be omitted.

Referring to FIG. 2, the branched pipe forming apparatus 2 according to the present embodiment further includes a heat blocking portion 800. The heat shielding part 800 serves to shield the heat generated during the induction heating of a part of the pipe 10 protruding into the branch pipe forming hole 210 by the heating part 700 . This is because heat generated by induction heating of a part of the pipe 10 by the heating unit 700 is prevented from being transferred to other parts or other parts of the pipe 10 through the upper mold 200 It is for this reason.

Hereinafter, a method of forming a bifurcated pipe according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 3 is a workflow diagram showing a step of molding a bifurcated pipe in accordance with a bifurcated pipe forming method according to an embodiment of the present invention. FIGS. 4 to 6 are operation state diagrams showing a process of molding a bifurcated pipe according to an embodiment of the present invention.

Referring to Fig. 3, the present embodiment forms a bifurcated pipe by a pipe seating step S10, a pipe deformation step S20, and a boring step S30.

More specifically, as shown in Fig. 4, the pipe 10 is seated in the interior of the cavity C in the pipe seating step S10. The pipe 10 can be seated inside the cavity C in a state where the upper cavity C substantially moves upward with respect to the lower cavity C and the cavity C is open.

5, in the pipe deformation step S20, plastic deformation of the pipe 10 placed inside the cavity C is performed, so that the branch pipe 11 is substantially formed . In this embodiment, the pipe deformation step S20 includes a heating unit power applying step S21, a pipe pressing step S22, and a fluid supplying step S23. In the heating unit power applying step S21, the heating unit 700 receives a current. The pipe pressing step S22 and the fluid supplying step S23 may be performed by pressing both ends of the pipe 10 by the feeding punch 300 and pressing the both ends of the pipe 10 by the fluid supplying part 500, A part of the pipe 10 protrudes into the branch pipe forming hole 210 and the branch pipe 11 is formed.

Particularly, in this embodiment, the heating unit power applying step S21 is performed simultaneously with the pipe pressing step S22, the fluid supplying step S23, or the pipe pressing step S22 and the fluid supplying step S23 . Therefore, according to the present embodiment, a portion of the pipe 10 protruding into the branch pipe forming hole 210, that is, the branch pipe 11 can be induction-heated by the heating unit 700 . Further, even when the pipe 10 is formed of a material having relatively high rigidity by the induction heating of the branch pipe 11, the branch pipe 11 can be formed more easily. Also, it is possible to relatively reduce the pressure of the fluid supplied to the inside of the pipe 10 for forming the same branch pipe 11. In addition, by heating by the heating unit 700, work hardening of the branch tube 11 can be prevented during molding.

6, in the perforating step S30, the counter punch 600 forms a through hole at the tip of the pipe 10 protruding into the branch pipe forming hole 210. As shown in FIG. Finally, after the pipe 10 is separated from the cavity C, the front end of the branch pipe 11 is finished, thereby completing the formation of the branched pipe.

Within the scope of the basic technical idea of the present invention as described above, many other modifications are possible to those having ordinary knowledge in the art, and the scope of the right of the present invention is interpreted based on the scope of the appended utility model registration request .

100: lower mold 200: upper mold
210: Branch tube forming hole 300: Feeding punch
400: holder 500: fluid supply part
600: counter punch 700: heating part
800: heat block

Claims (9)

A branch pipe forming apparatus for forming a branch pipe (11) by plastic deformation of a part of a pipe (10), comprising:
The molding apparatus includes:
A lower mold 100;
An upper mold 200 defining a cavity C in which the pipe 10 is seated together with the lower mold 100 and forming a branch pipe forming hole 210 communicating with the cavity C;
A pair of feeding punches (300) for pressing both ends of the pipe (10) placed in the cavity (C);
A pair of holders (400) for sealing both ends of the cavity (C);
A fluid supply part 500 for supplying fluid to the inside of the pipe 10 which is seated inside the cavity C at a predetermined pressure;
A counter punch 600 forming a through hole at a tip of a part of the pipe 10 protruding into the branch pipe forming hole 210;
A heating unit 700 for heating a part of the pipe 10 protruding into the branch pipe forming hole 210; And
A heat blocking part 800 for blocking heat in a process of induction heating of a part of the pipe 10 protruding into the branch pipe forming hole 210 by the heating part 700; And a plurality of pipe-shaped pipes.
The method according to claim 1,
The heating unit 700 receives a current to induction-heat a part of the pipe 10 protruding into the branch pipe forming hole 210.
3. The method of claim 2,
Wherein a current is supplied to the heating unit (700) before or at the same time as fluid is supplied to the inside of the pipe (10) by the fluid supply unit (500).
3. The method of claim 2,
Wherein the current supplied to the heating unit (700) varies in frequency depending on the material of the pipe (10).
A method of forming a bifurcated pipe using the bifurcated pipe forming apparatus of claim 1, the method comprising:
A pipe seating step (S10) in which the pipe (10) is seated inside the cavity (C);
The feeding punch 300 and the fluid supply part 500 press both ends of the pipe 10 so that a part of the pipe 10 is plastically deformed and protruded into the branch pipe forming hole 210, A pipe deforming step (S20) of supplying fluid into the inside of the pipe (10); And
The counter punch 600 includes a perforation step S30 in which a through hole is formed at the tip of the pipe 10 protruding into the branch pipe forming hole 210; Lt; / RTI >
In the pipe deformation step S20,
Wherein the heating unit (700) heats a part of the pipe (10) protruding into the branch pipe forming hole (210).
6. The method of claim 5,
The heating unit 700 may apply a current at least at the time of starting the pipe deformation step S20 or at the same time as the pipe deformation step S20 so that the pipe 10 protruding into the branch pipe forming hole 210 ) Is partly heated by induction heating.
A method of forming a bifurcated pipe using the bifurcated pipe forming apparatus of claim 1, the method comprising:
A pipe seating step (S10) in which the pipe (10) is seated inside the cavity (C);
The heating unit 700 may include a heating unit power applying step (S21) in which a current is applied;
Wherein the feeding punch (300) comprises: a pipe pressing step (S22) for pressing both ends of the pipe (10);
A fluid supplying step (S23) of supplying the fluid to the inside of the pipe (10) at a preset pressure; And
The counter punch 600 may be disposed on the pipe 10 protruding into the branch pipe forming hole 210 by the pressurizing by the feeding punch 300 and the fluid supplied by the fluid supply part 500. [ A perforating step (S30) of forming a through hole () at the tip end; Lt; / RTI >
Wherein a part of the pipe (10) protruding into the branch pipe forming hole (210) is induction heated by the heating part (700).
8. The method of claim 7,
The heating unit power applying step S21 is a step of performing a branch pipe shaping method which starts at the same time as the pipe pressing step S22 and the fluid supplying step S23 or at the same time as the pipe pressing step S22 and the fluid supplying step S23 .
A bifurcated pipe formed by the method of any one of claims 5 to 8.

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