KR102084375B1 - Apparatus for forming pipe flare - Google Patents

Abstract

The present invention relates to a device for forming a pipe flare, capable of accurately forming a pipe flare by a new compact structure which is totally different from conventional art. The device for forming a pipe flare comprises: a fixing frame fixed onto a worktable; a fixing plate fixed to the front of the fixing frame in order for an upper part to protrude to the upper part of the fixing frame; a fixing jig installed in the upper part of the fixing plate and selectively pressing and fixing the outer circumference of a pipe inserted from the front in accordance with expansion and shrinkage of the inner diameter; a forming cylinder fixed to the fixing frame by being spaced to the rear of the fixing jig; and a pressing member. The forming cylinder includes: a fixing cylinder selectively expanding and contracting the inner diameter of the fixing jig by a fixing cylinder rod formed of a cylindrical shape inserted between the inner circumference of an outer circumferential body and the outer circumference of an inner circumferential body formed in the cylindrical shape to be inserted and withdrawn forward and backward in accordance with hydraulic operation; and a forming cylinder rod coaxially connected to the rear of the fixing cylinder and inserted to be inserted and withdrawn forward and backward in accordance with the hydraulic operation. The pressing member is connected to the front of the forming cylinder rod and moves forward and backward in accordance with the insertion and withdrawal of the forming cylinder rod as the outer circumference is in contact with the inner circumference of the inner circumferential body of the fixing cylinder. The pressing member also presses and forms a rear end of the pipe fixed to the fixing jig in a flare shape by a forming cone formed in a cone shape in the front.

Description

Pipe Flare Forming Equipment {APPARATUS FOR FORMING PIPE FLARE}

The present invention relates to a pipe flare forming apparatus for integrally forming a flare projecting outwardly to the end of the pipe by expanding the end of the pipe in a trumpet shape.

In general, pipes are hollow, elongated tubes, and are mainly used for transporting a fluid (gas or liquid) or powder. That is, a pipe is used for the metal pipe pile etc. which are normally used for building materials, the moving path which supplies fuel to engines, such as a ship.

It is common to use such pipes by connecting several pipes, where the connection between the pipes is usually made through a disk-shaped flange having a constant thickness.

The conventional flange is formed of a disc having a predetermined thickness to form a coupling hole into which the pipe is fitted in the center, and the coupling hole has a structure in which a plurality of coupling holes are formed so that the flanges are connected to each other when the pipe is connected. The pipe and the flange are joined together and fixed by welding, and the fixed flange is connected to the flange of another pipe to connect the pipe and the pipe.

However, since the flange is coupled to one end of the pipe only by welding, the conventional flange is weak in rigidity of the welded portion, and damage such as a crack is generated due to external impact or high pressure.

In order to solve this disadvantage, especially when connecting the high pressure pipe, the pipe end is integrally expanded in a flare shape so as to have an angle of 37 °, and high tightening force is obtained by tightening the nut through the tube, nut, and sleeve structure. To make it possible.

In order to form an end of such a pipe in a flare shape, a pipe flare forming apparatus is used, for example, a 'pipe flare flange forming apparatus' of Patent No. 10-1296767 and a 'pipe flare forming apparatus' of Patent No. 10-1642245. Etc.

The above-described pipe flare forming apparatus according to the prior art has a long structure before and after with a complicated configuration such as a moving block, a guide rail and a transfer cylinder for moving the moving jig forward and backward with respect to the fixed jig to which the first pipe is fixed. And the second fixing jig and the moving jig are separately installed so that it is difficult to exactly match the concentricity between the pipe fixed to the fixing jig and the molding cone installed on the moving jig, and the third molding for forming the flare of the pipe end Having a rotating motor and a pulley-belt structure as a power transmission means on the moving jig to rotate the cone has a problem that it is difficult to precisely form flare of the pipe end as well as noise and vibration.

An object of the present invention devised to solve the above problems, it is possible to achieve a precise flared molding of the pipe end through a new structure that is completely different from the prior art can provide a uniform and high-quality products, compact structure The present invention provides a pipe flare forming apparatus capable of improving space utilization.

In order to achieve the above object, the pipe flare forming apparatus according to the present invention includes a fixed frame fixedly installed on a workbench, a fixed plate fixedly installed in front of the fixed frame such that an upper portion protrudes upward of the fixed frame, A fixing jig installed on an upper portion of the fixing plate and selectively pressing and fixing an outer circumferential surface of a pipe inserted from the front according to expansion and contraction of the inner diameter, and spaced to the rear of the fixing jig and fixed to the fixing frame, respectively. A fixed cylinder rod having a cylindrical shape inserted and pulled back and forth in response to the operation of hydraulic pressure between the outer circumferential surface of the cylindrical inner diameter body and the inner circumferential surface of the outer diameter body selectively expands and contracts the inner diameter of the fixed jig. Coaxially coupled to the rear of the fixed cylinder, the hydraulic operation And a molding cylinder including a molding cylinder rod which is inserted into and pulled out of the front and rear, and coupled to the front of the molding cylinder rod, and an outer circumferential surface thereof contacts with the inner circumferential surface of the inner diameter body of the fixed cylinder. It moves forward and backward, and comprises a pressurizing member for press-molding the rear end of the pipe fixed to the fixing jig into a flare shape through the front cone-shaped forming cone.

In addition, the fixing jig, a cylindrical cylindrical member fixed to the upper and rear ends of the fixing plate fixedly coupled, a ring-shaped fixing ring member is coupled coaxially to the front of the fixed cylindrical member, and the fixed It is coaxially coupled to the rear surface of the fixing ring member so as to be spaced apart from the inner diameter direction of the cylindrical member, and has a cylindrical shape having a tapered outer circumferential surface so as to decrease in diameter toward the rear with an inner circumferential surface of the same diameter, A plurality of slits are formed, characterized in that it comprises a pipe fixing member that is reduced in diameter by the pressure of the outer diameter.

In addition, the fixed cylinder, the fixed cylinder rod is inserted in the inner diameter direction of the fixed cylinder rod when the fixed cylinder rod is moved forward in accordance with the operation of the hydraulic pressure while the fixed cylinder rod presses the outer diameter of the pipe fixing member to the pipe Reduce the inner diameter of the fixing member, and when the fixed cylinder rod is moved backward, the pipe fixing member is separated from the inner diameter direction of the fixed cylinder rod to release the outer diameter of the pipe fixing member to expand the inner diameter of the pipe fixing member. It features.

In addition, the fixed cylinder rod is characterized in that the front inner peripheral surface is tapered so that the outer peripheral surface of the pipe fixing member.

The pipe fixing member may further include a flared seat having a rear inner peripheral surface tapered at a predetermined angle toward an outer diameter direction such that a rear end portion of the pipe is formed into a flare shape, and the pressing member includes the forming cone being fixed to the pipe. It is inserted into the rear end of the pipe fixed to the member is characterized in that it is molded with the flare seating portion to form the rear end of the pipe in a flare shape.

In addition, it characterized in that it further comprises a pipe positioning unit for limiting the rear end insertion distance of the pipe inserted from the front of the fixing jig.

The pipe positioning unit may include a positioning rotary shaft rotatably coupled to an upper portion of the fixed plate through a front and rear end, and a rotary knob coupled to a front of the positioning rotary shaft to rotate the positioning rotary shaft, And a positioning rod coupled to the rear of the positioning rotary shaft and rotating together when the positioning rotary shaft rotates according to the rotation of the rotary knob such that the rear end of the pipe inserted from the front of the fixing jig is contacted. It is done.

In addition, the fixed cylinder rod of the fixed cylinder, characterized in that the escape hole is formed so as not to interfere with the rotation of the positioning rod.

The apparatus may further include a protective cover surrounding the workbench so that the front of the fixing jig is exposed, and a transparent window coupled to the upper or side surface of the protective cover so as to check the inside of the protective cover from the outside. It features.

In addition, the protective cover is installed on the front side, characterized in that it further comprises a plurality of push buttons or control panel for controlling the operation of the fixed cylinder and the molding cylinder.

The pipe flare forming apparatus according to the present invention is precisely flared at the pipe end while each component achieves the correct concentricity through a new structure of a fixed frame, a fixed plate, a fixed jig, a fixed cylinder, a molded cylinder, and a pressing member, which is completely different from the conventional art. Molding can be achieved to provide a uniform and high quality product, and in particular, it has a compact structure away from the structure for the forward and backward movement or the rotation motor and the belt-pulley structure for the rotation of the molding cone. There is an effect that can improve the usability.

1 is a perspective view showing an embodiment of a pipe flare forming apparatus according to the present invention,
FIG. 2 is a perspective view of main parts in a state where a working table is removed in the embodiment of FIG. 1; FIG.
3 is a plan view of the embodiment of FIG.
4 is a side view of the embodiment of FIG. 2,
5 is an exploded side view of the embodiment of FIG. 4;
FIG. 6 is a side sectional view seen from the line AA ′ of the embodiment of FIG. 2;
FIG. 7 is a cutaway perspective view of the AA line of the embodiment of FIG. 2;
8 is a perspective view illustrating a process of positioning a pipe and inserting a pipe in front of the fixing jig from the embodiment of FIG. 2;
9 is a cutaway perspective view of the line B-B 'of the embodiment of FIG. 8;
10 is a cutaway perspective view of the embodiment of FIG. 9 viewed from another direction;
FIG. 11 is a cutaway perspective view illustrating a process of advancing a fixed cylinder rod from the embodiment of FIG. 9;
12 is a cutaway perspective view illustrating a return process of the pipe positioning unit from the embodiment of FIG. 11;
FIG. 13 is a cutaway perspective view illustrating a process of advancing the molding cylinder rod from the embodiment of FIG. 12;
FIG. 14 is a cutaway perspective view illustrating a process of reversing the molding cylinder from the embodiment of FIG. 13;
FIG. 15 is a cutaway perspective view illustrating a process of reversing the fixed cylinder from the embodiment of FIG. 14;
FIG. 16 is a perspective view illustrating a process of taking out the pipe from which the flare forming is completed from the front of the fixing jig from the embodiment of FIG. 15;
17 is a perspective view showing another embodiment of the pipe flare forming apparatus according to the present invention.

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

Pipe flare forming apparatus according to the present invention, as shown in Figure 1 to 16, worktable 100, fixed frame 200, fixed plate 300, fixed jig 400, fixed cylinder 500, molding cylinder 600 and the pressing member 700, and may further include a pipe positioning unit (800). In addition, as shown in FIG. 17, the protection cover 900, a confirmation window 910, a push button 920, and a control panel 930 may be further included.

The pipe flare forming apparatus according to the present invention includes a worktable 100, a fixed frame 200, and a fixed plate 300, which is a base as a large fixed base, and a pipe for forming a flare ( It includes a fixing jig 400, a fixed cylinder 500 for inserting and fixing the P), the fixed cylinder 500, the molding cylinder 600 and the pressure member (flare forming part for forming the flare (F) in the pipe (P)) 700).

First, the work table 100 serving as a base is a work table as shown in FIG. 1, and a plurality of legs (not shown) are provided at a lower portion to secure a height that is easy for a worker to work with, and each leg is moved. A plurality of moving wheels (not shown) for the may be provided. In addition, as shown in FIG. 1, a fixed frame 200 to be described below is fixedly installed on the upper portion of the work table 100, and a hydraulic power pack (not shown) is provided at the lower portion of the work table 100 to fix the cylinder described later ( The hydraulic pressure is supplied to and recovered from the 500 and the molding cylinder 600 so that the hydraulic operation can be performed.

In addition, as shown in Figures 1 to 16, the fixed frame 200 is fixedly installed on the work table 100, the fixed plate 300 is fixed to the fixed frame (so that the upper portion protrudes above the fixed frame 200) 200 is fixedly installed in front of. Based on the fixing frame 200 and the fixing plate 300, the fixing jig 400 and the fixing cylinder 500, which are the pipe fixing parts, and the molding cylinder 600 and the pressing member 700, which are flaring parts, are installed. The reason why the upper part of the fixing plate 300 protrudes upward of the fixing frame 200 is that the fixing cylinder 500 and the molding cylinder 600 are coaxially installed on the upper part of the fixing frame 200. This is because the fixing jig 400 is installed on the protruding upper portion of the fixing plate 300 so as to be coaxial with the cylinder 500 and the molding cylinder 600.

Next, the fixing jig 400, which is a pipe fixing part, is installed on the upper part of the fixing plate 300, as shown in FIGS. 2 to 16, and an outer circumferential surface of the pipe P inserted from the front according to expansion and contraction of the inner diameter. Optionally press lock. More specifically, the fixing jig 400 includes a fixing cylindrical member 410, a fixing ring member 420, and a pipe fixing member 430.

The fixed cylindrical member 410 is fixedly coupled through the front and rear ends to the upper portion of the fixed plate 300, the fixed ring member 420 is coaxially coupled to the front of the fixed cylindrical member 410 in a ring shape. At this time, the pipe fixing member 430 is coaxially coupled to the rear surface of the fixing ring member 420 so as to be spaced apart in the inner diameter direction of the fixed cylindrical member 410, the diameter is smaller toward the inner peripheral surface and the rear of the same diameter A cylindrical shape having a tapered outer circumferential surface, a plurality of slits 431 are formed along the periphery in the longitudinal direction, and the inner diameter is reduced according to the pressure of the outer diameter.

That is, the fixed cylindrical member 410 and the fixed ring member 420 is a fixed component of the fixed jig 400, and the pipe fixed to the rear of the fixed ring member 420 in the inner diameter direction of the fixed cylindrical member 410 The member 430 is coupled and positioned. Therefore, when the pipe (P) is inserted in front of the fixing ring member 420 as shown in Figures 8 to 10, the pipe (P) inserted in the inner diameter direction of the pipe fixing member 430 passes naturally. . Since the pipe fixing member 430 has a plurality of slits 431 formed along the periphery in the longitudinal direction, as shown in FIG. 11, when the force is applied from the outer diameter direction, the slit 431 that is opened is closed while the inner diameter is reduced. Accordingly, by pressing the outer peripheral surface of the pipe (P) inserted in the inner diameter direction of the pipe fixing member 430 is to fix the pipe (P).

The fixed cylinder 500 is configured to reduce the inner diameter by pressing the outer peripheral surface of the pipe fixing member 430 such that the pipe fixing member 430 of the fixing jig 400 presses and fixes the outer peripheral surface of the pipe P. That is, the fixed cylinder 500 is spaced to the rear of the fixing jig 400 is fixed to the fixed frame 200, each of the outer peripheral surface and the outer diameter body 520 of the inner diameter body 510 of the cylindrical shape A cylindrical cylinder rod 530 having a cylindrical shape that is inserted in and pulled out back and forth according to the operation of hydraulic pressure between inner circumferential surfaces selectively expands and contracts the inner diameter of the fixing jig 400.

More specifically, the fixed cylinder 500 is the inner diameter of the fixed cylinder rod 530 is the pipe fixing member 430 when the fixed cylinder rod 530 moves forward according to the operation of the hydraulic pressure as shown in FIG. The fixed cylinder rod 530 is pressed in the direction to reduce the inner diameter of the pipe fixing member 430 by pressing the outer diameter of the pipe fixing member 430, the fixed cylinder rod 530 as shown in FIG. The pipe fixing member 430 is displaced from the inner diameter direction of the fixed cylinder rod 530 when the rear movement thereof, and the inner diameter of the pipe fixing member 430 is expanded while the outer diameter of the pipe fixing member 430 is released. .

At this time, the fixed cylinder rod 530 is tapered so that the front inner peripheral surface of the fixed cylinder rod 530 and the outer peripheral surface of the pipe fixing member 430. This is because the outer circumferential surface of the pipe fixing member 430 is tapered so as to decrease in diameter toward the rear. Accordingly, when the front inner circumferential surface of the fixed cylinder rod 530 and the rear outer circumferential surface of the pipe fixing member 430 contact each other, it is smooth. It is intended to be guided while being guided.

As described above, the pipe cylinder for fixing the flare (F) is inserted through the fixing jig 400 and the fixed cylinder 500 to fix the pipe (P) to form a flare molding part for forming the flare (F) after molding 600 and the pressing member 700 is operated.

The molding cylinder 600, which is a flare molding part, is coaxially coupled to the rear of the fixed cylinder 500 as illustrated in FIGS. 2 to 16, and is inserted into the molding cylinder rod 610 to be pulled out back and forth according to hydraulic operation. Is provided. At this time, the pressing member 700 is coupled to the front of the molding cylinder rod 610, the outer peripheral surface is in contact with the inner peripheral surface of the inner diameter body 510 of the fixed cylinder 500 withdrawal of the molding cylinder rod 610 As it moves forward and backward, the rear end portion of the pipe (P) fixed to the fixing jig 400 through the forming cone 710 of the front cone shape is press-molded into a flare (F) shape.

That is, when the molding cylinder rod 610 moves forward by the operation of the molding cylinder 600, as shown in Figure 13, the molding cone 710 of the pressing member 700 coupled to the front of the molding cylinder rod 610 ) Is inserted into the rear end of the pipe (P) fixed to the fixing jig 400, and the flare (F) is formed by forming a flare (F) to the outer diameter direction in accordance with the inclined angular shape of the forming cone 710.

At this time, in order to determine the length of the flare (F) and the opening angle of the pipe fixing member 430 as shown in Figure 13 the rear inner peripheral surface is formed in the flare (F) shape so that the rear end of the pipe (P) shape And flared seating portion 432 tapered at a predetermined angle toward. Accordingly, the pressing member 700 is inserted into the rear end of the pipe (P) fixed to the pipe fixing member 430, the molding cone 710 is joined to the flare seating portion 432 and the pipe ( The rear end of P) is shaped into a flare (F) shape. In particular, the flare (F) of the pipe (P) used in the high-pressure pipe is usually opened to have an angle of 37 °, the flare seating portion 432 of the pipe fixing member 430 and the forming cone of the pressing member 700 ( 710) Each angle is also preferably manufactured accordingly.

Fixing the pipe (P) inserted by the fixing jig 400 and the fixed cylinder 500, which is the pipe fixing as described above, the rear end portion of the fixed pipe (P) forming cylinder 600 and the pressurizing member (flare forming part) Through 700 is formed into a flare (F) shape. Here, since the length and angle of the flare (F) is determined according to the shape of the flare seating portion 432 formed on the pipe fixing member 430 of the fixing jig 400 and the shape of the forming cone 710 of the pressing member 700. The insertion distance of the pipe (P) to be inserted into the fixing jig 400 must be accurately positioned to achieve a uniform and high quality flare forming process.

To this end, as shown in FIGS. 1 to 16, the rear end insertion distance of the pipe P inserted from the front of the fixing jig 400 is restricted through the pipe positioning unit 800. More specifically, the pipe positioning unit 800 may include a positioning rotary shaft 810, a rotation knob 820, and a positioning rod 830.

That is, the positioning rotary shaft 810 is rotatably coupled to the upper and rear ends of the fixed plate 300, the rotary knob 820 is coupled to the front of the positioning rotary shaft 810 to the positioning The rotating shaft 810 is rotated. At this time, the positioning rod 830 is coupled to the rear of the positioning rotary shaft 810, the rear end of the pipe (P) is inserted from the front of the fixing jig 400 as shown in FIGS. As the rotary knob 820 rotates to be in contact with each other, the rotational positioning shaft 810 rotates together.

Accordingly, when the pipe P is inserted from the front of the fixing jig 400, the rotary knob 820 is rotated to raise the positioning rod 830 on the entrance direction of the pipe P, and the pipe P Being in contact with the rear end of the pipe (P) will be able to accurately limit the entry distance. The pipe positioning unit 800 including the positioning rotary shaft 810, the rotary knob 820 and the positioning rod 830 as described above is configured to operate by manual rotation of the rotary knob 820, but the rotation Instead of the handle 820 may be applied to the automatic operation configuration by a rotary motor (not shown), it may be applied to a configuration that moves linearly instead of the configuration that the positioning rod 830 rotates.

At this time, the fixed cylinder rod 510 of the fixed cylinder 500 may be formed through the escape hole 531 so as not to interfere with the rotation of the positioning rod 830, as shown in FIGS. That is, when the pipe P is inserted into the fixing jig 400, the positioning rod 830 of the pipe positioning unit 800 operates to accurately position the pipe P, and then the positioning rod 830 returns. If the fixed cylinder rod 510 of the fixed cylinder 500 moves forward, the escape hole 531 will not be necessary. However, in order to prevent the minute movement of the pipe P according to the reduction in the inner diameter of the pipe fixing member 430 of the fixing jig 400 during the forward movement of the fixed cylinder rod 510, the front of the pipe P is pushed backward. In this case, it is still necessary for the positioning rod 830 to contact the rear of the pipe P to limit the insertion distance. Accordingly, the positioning rod 830 is to be returned through the escape hole 531 of the fixed cylinder rod 510 before the molding cylinder rod 610 of the molding cylinder 600 moves forward.

Meanwhile, the pipe flare forming apparatus according to the present invention may further include a protective cover 900, a confirmation window 910, a push button 920, and a control panel 930 as shown in FIG. 17. The protective cover 900 wraps the work table 100 so that the front of the fixing jig 400 is exposed, and protects each of the internal components while preventing foreign matter from flowing into the interior. Confirmation window 910 is coupled to the upper surface or side of the protective cover 900 so as to check the inside of the protective cover 900 from the outside of the light-transmitting material, the operator in real time to confirm the current operating process from the outside It is to make it possible.

In addition, any one or both of the plurality of pushbuttons 920 or the control panel 930 may be installed at the front of the protective cover 900, the operation of the fixed cylinder 500 and the molding cylinder 600 To control. Push button 920 is an intuitive push-actuated button mainly performs functions such as ON / OFF button or emergency stop of the entire device, the control panel 930 is a separate control or display for each component (not shown) Various control algorithms such as displaying the current progress through the C) may be performed.

Hereinafter, the operation of the pipe flare forming apparatus according to the present invention will be described with reference to FIGS. 2, 7 and 8 to 16, the specific relationship between the specific components or the above-described detailed description of the salping is omitted.

As shown in FIGS. 2 and 7, the fixed cylinder 500, the molding cylinder 600, and the pipe positioning unit 800 are all in the home state (returned state) while the pipe P is not inserted and fixed. .

As shown in FIGS. 8 to 10, the pipe P is inserted into the fixing jig 400, and the rotation knob 820 of the pipe positioning unit 800 is rotated before the pipe P is inserted. The rod 830 limits the rear entry distance of the pipe P.

As shown in FIG. 11, the fixed cylinder 500 operates to move the fixed cylinder rod 530 forward, and the pipe fixing member 430 of the fixed jig 400 is inserted in the inner diameter direction of the fixed cylinder rod 530. While the outer diameter of the pipe fixing member 430 is pressed, the inner diameter of the pipe fixing member 430 is reduced, thereby pressing and fixing the outer diameter of the pipe P inserted therein.

As shown in FIG. 12, the rotation knob 820 of the pipe positioning unit 800 is rotated and returned to rotate the positioning rod 830 through the escape hole 531 of the fixed cylinder rod 530.

As shown in FIG. 13, the molding cylinder 600 operates to move the molding cylinder rod 610 forward, and the pressing member 700 moves forward together, and the molding cone 710 moves to the rear end of the pipe P. Is inserted in the direction. At this time, the flare seating portion 432 formed on the rear inner circumferential surface of the pipe fixing member 430 and the forming cone 710 are joined together, and the rear end of the pipe P is sandwiched therebetween, thereby flaring at a predetermined angle (for example, 37 °). F) It is molded.

As shown in FIG. 14, the molding cylinder 600 returns to operate so that the molding cylinder rod 610 moves backward, and the pipe P is in a state in which the flaring F molding process is completed. However, in consideration of the material, diameter, and thickness of the pipe P, the process shown in FIGS. 13 and 14, that is, the flare F of the pipe P by repeating the forward movement and the backward movement of the molding cylinder rod 610 several times. The molding process may be completed.

As shown in FIG. 15, after the flaring F forming process of the pipe P is completed and the molding cylinder 600 returns, the fixed cylinder 500 moves back while the fixed cylinder rod 630 moves backward. Done. Accordingly, when the fixed cylinder rod 630 moves rearward, the pipe fixing member 430 is separated from the inner diameter direction of the fixed cylinder rod 630, and the inner diameter thereof is expanded while the outer diameter of the pipe fixing member 430 is released. .

As shown in FIG. 16, the pipe P in which the flare F molding process is completed free from the fixed state of the fixing jig 400 can be taken out of the front of the fixing jig 400, and by repeating the above-described process. What is necessary is just to carry out the flare forming process of another pipe P continuously.

As described above, the apparatus for forming a pipe flare according to the present invention includes a fixed frame 200, a fixed plate 300, a fixed jig 400, a fixed cylinder 500, a molding cylinder 600, and a pressing member which are completely different from those of the related art. The new structure 700 allows each component to achieve precise concentricity and achieve precise flare forming of the pipe (P) end to provide a uniform, high-quality product, particularly conventional back and forth movement. The structure has a compact structure to escape from the rotating motor and the belt-pull structure for the rotation of the forming cone 710 has the effect of improving the space utilization.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

P: Pipe
F: flare
100: working table
200: fixed frame
300: fixed plate
400: fixed jig 410: fixed cylindrical member
420: fixing ring member 430: pipe fixing member
431: slit 432: flare seat
500: fixed cylinder
510: inner diameter body 520: outer diameter body
530: fixed cylinder rod 531: escape hole
600: molding cylinder 610: molding cylinder rod
700: pressure member 710: forming cone
800: pipe positioning unit 810: positioning rotary shaft
820: rotation handle 830: positioning rod
900: protective cover 910: confirmation window
920: push button 930: control panel

Claims (10)

A fixed frame fixedly installed on a workbench,
A fixed plate fixedly installed in front of the fixed frame such that an upper portion protrudes upward of the fixed frame;
A fixing jig installed on an upper portion of the fixing plate and selectively pressing and fixing an outer circumferential surface of the pipe inserted from the front according to expansion and contraction of the inner diameter;
A cylindrical shape fixed to the fixed frame spaced apart from the rear of the fixing jig, each of which is cylindrically inserted between the outer circumferential surface of the inner diameter body and the inner circumferential surface of the outer diameter body to be pulled back and forth according to the operation of hydraulic pressure. A fixed cylinder to which the cylinder rod selectively expands and contracts the inner diameter of the fixed jig;
A molding cylinder coupled to the rear of the fixed cylinder coaxially, and having a molding cylinder rod inserted into the drawer back and forth according to hydraulic operation;
It is coupled to the front of the molding cylinder rod, the outer circumferential surface is in contact with the inner circumferential surface of the inner diameter body of the fixed cylinder to move back and forth in accordance with the drawing out of the molding cylinder rod, and to the fixing jig through the forming cone of the front conical shape Pipe flare forming apparatus comprising a pressing member for pressing the rear end of the fixed pipe in a flare shape.
The method of claim 1,
The fixing jig,
A cylindrical cylindrical member fixed through the front and rear ends and fixed to the upper portion of the fixed plate;
A ring-shaped fixed ring member coupled coaxially to the front of the fixed cylindrical member;
It is coaxially coupled to the rear surface of the fixing ring member so as to be spaced apart from the inner diameter direction of the fixed cylindrical member, and has a cylindrical shape having a tapered outer circumferential surface so that the diameter becomes smaller toward the rear of the same diameter, the length of the front and rear along the circumference The pipe flare forming apparatus, characterized in that it comprises a pipe fixing member is formed in the plurality of slits in the inner diameter is reduced in accordance with the pressure of the outer diameter.
The method of claim 2,
The fixed cylinder,
When the fixed cylinder rod is moved forward by the hydraulic operation, the pipe fixing member is inserted in the inner diameter direction of the fixed cylinder rod while the fixed cylinder rod presses the outer diameter of the pipe fixing member to reduce the inner diameter of the pipe fixing member. When the fixed cylinder rod moves backward, the pipe fixing member is separated from the inner diameter direction of the fixed cylinder rod to release the outer diameter of the pipe fixing member, thereby expanding the inner diameter of the pipe fixing member. .
The method of claim 3,
The fixed cylinder rod,
Pipe flaring forming apparatus, characterized in that the front inner peripheral surface is tapered so as to match the outer peripheral surface of the pipe fixing member.
The method of claim 2,
The pipe fixing member,
The rear inner circumferential surface is further tapered flared seating portion at a predetermined angle toward the outer diameter direction so that the rear end of the pipe is formed into a flare shape,
The pressing member,
And a molding cone is inserted into a rear end of the pipe fixed to the pipe fixing member to be joined with the flare seating portion to form a rear end of the pipe into a flare shape.
The method of claim 1,
And a pipe positioning unit for limiting a rear insertion distance of the pipe inserted from the front of the fixing jig.
The method of claim 6,
The pipe positioning unit,
Positioning rotary shaft rotatably coupled to the upper and rear ends of the fixed plate,
A rotary knob coupled to the front of the positioning rotary shaft to rotate the positioning rotary shaft;
It includes a positioning rod coupled to the rear of the positioning rotary shaft, and rotates together when the positioning rotary shaft rotates in accordance with the rotation of the rotary knob so that the rear end of the pipe inserted from the front of the fixing jig contacted. Characterized in that the pipe flare forming apparatus.
The method of claim 7, wherein
The fixed cylinder rod of the fixed cylinder,
Pipe flare forming apparatus characterized in that the escape hole is formed so as not to interfere with the rotation of the positioning rod.
The method of claim 1,
A protective cover surrounding the work table so that the front of the fixing jig is exposed;
Pipe flare forming apparatus further comprises a confirmation window of a light-transmitting material coupled to the upper surface or the side of the protective cover so that the inside of the protective cover from the outside.
The method of claim 9,
And a plurality of push buttons or a control panel installed at the front of the protective cover and controlling the operation of the fixed cylinder and the molding cylinder.

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