KR101933358B1 - Auto forming system for t type branch pipe of metal pipe - Google Patents

Abstract

In the present invention, when a T-shaped branch pipe is molded into a pipe, the screw rod can be completely and automatically fastened to the mold and the hydraulic device, so that the rectangularity of the multiple pipes to be formed can be uniformly fired continuously and repeatedly (T) -shaped automatic tube forming system of metal pipe which can improve the quality and productivity of piping by securing mass productivity, and to make various T will be.
In order to accomplish this, the present invention provides a clamping device for fixing a perforated pipe, a mold positioned below the hole for forming a T-shaped branch pipe and having a screw hole, A driving means coupled to the screw rod for rotating the screw rod in normal and reverse directions and a screw for rotating the screw rod in a forward and reverse direction, A screw movable part having a supporting nut including a supporting nut for lifting and lowering the rod, and a lifting device which is movable up and down by hydraulic pressure, wherein the lifting device is provided with a main nut for detachably attaching the screw rod to the lifting device, And a control unit for controlling the driving unit of the screw moving unit and the operation of the hydraulic unit It characterized in that, including the fisherman.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automatic forming system for a metal pipe,

In the present invention, when a T-shaped branch pipe is molded into a pipe, the screw rod can be completely and automatically fastened to the mold and the hydraulic device, so that the rectangularity of the multiple pipes to be formed can be uniformly fired continuously and repeatedly By ensuring mass productivity, it is possible to dramatically improve the perpendicularity uniformity, pipe quality and productivity of tee-type tubular pipes and to provide a metal pipe (T) -shaped automatic tube forming system.

Generally, in the piping operation for piping for transferring fluids such as cold / hot water, oil, chemicals, etc., when a branch pipe is branched from a main pipe for distributing fluid, a tee (T) type branch pipe is formed at a branching position.

A tee-shaped pipe of a pipe is formed by drilling a hole in a pipe, placing a conical metal mold in the pipe under the hole, inserting the screw into the hole at the top of the hole and fastening it to the metal mold, And a die (T) -type branch pipe is formed in the pipe by plastic deformation by forced withdrawal of the metal mold.

In the conventional method for forming a tee (T) type branch pipe by such a method, a screw is fastened to a mold and a screw is mounted to a hydraulic device by hand.

Accordingly, when a plurality of T (T) -type branch tubes are formed due to a non-uniform vertical arrangement angle of the mold, defects are often generated due to unevenness in the perpendicularity of the T (T) type branch tubes, On the other hand, there was a difficulty in not being able to follow productivity due to excessive manpower and time.

In addition, when a plurality of tee (T) -type branch pipes are formed in a single pipe in different sizes, the specifications of the mold and the screw are different. As described above, since the screws for the mold and the hydraulic device are manually engaged, There is a problem that uniformity and piping quality are deteriorated and mass production is difficult.

Korean Registered Patent No. 10-1179150 (2012. 09. 07. Announcement) Korean Patent No. 10-1572651 (Announcement of Nov. 27, 2015) Korean Patent Publication No. 10-1997-0014862 (published on Apr. 28, 1997)

The present invention has been made to solve the above problems,

It is an object of the present invention to provide a method of manufacturing a pipe-type branch pipe, in which a screw rod is fully and automatically fastened to a mold and a hydraulic device, (T) -shaped automatic tube forming system of a metal pipe, which is capable of achieving high productivity and uniformity at the same time, thereby improving the uniformity of the squareness of the T (T) type tubes, and the piping quality and productivity.

Another object of the present invention is to provide a T (T) type automatic tube forming system for a metal pipe which enables rapid, continuous and continuous molding of various T (T) type tubes having various specifications.

According to an aspect of the present invention, there is provided an automatic forming system for a T-shaped branch pipe of a metal pipe,

A clamping device for fixing the perforated pipe;

A mold positioned below the hole and having a screw hole for forming a tee (T) -shaped tube in the pipe;

A mold mounting means for positioning the mold at a corresponding position in the pipe;

A screw rod installed on the upper portion of the hole of the pipe so as to be vertically movable and rotatable,

A driving unit including a rotary power transmitter coupled to the screw rod to rotate the screw rod in normal and reverse directions, and a screw moving unit to which the supporting means including the supporting nut is connected in an organic manner to raise and lower the screw rod;

A hydraulic device provided with a lifting / lowering elevator, a main nut detachably mountable to the screw rod, and a screw movable part supported by the lifting device; And

And a control unit for controlling the operation of the driving unit and the hydraulic unit of the screw moving unit.

Wherein the screw rod has a first screw portion engageable with the metal mold and a second screw portion engageable with the support nut and the main nut of the hydraulic device at an upper portion of the first screw portion, The key groove may be formed to be long in the vertical direction across the hatch openings.

In the screw moving portion, the driving means includes a control motor for controlling the rotational power transmitting member, the rotational power transmitting member being a pulley or a gear,

The supporting means may include at least one supporting nut to be screwed with the screw rod, and a fixing device for supporting the supporting nut and connected to the elevator of the hydraulic device.

Wherein the screw moving part is provided with a bearing and a supporting nut on the upper and lower sides of a rotary power transmitter about a rotary power transmitter coupled to the screw rod,

The fixing device may include a bracket provided between the bearing and the support nut, and a connecting member connecting the bracket to an elevator of the hydraulic device.

The support nut may be supported by the bracket, and an elastic member may be provided between the support nut and the bracket.

Wherein the metal mold has an upwardly conical plastic portion and a return guide portion downwardly conical below the branch plastic portion, the guide groove is vertically upwardly formed at the center of the lower portion of the return guide portion,

Wherein the mold mounting means is formed in a shape in which a cross section of the body has a loose tolerance with respect to an inner diameter of the pipe and a part of the upper portion is cut off and a mold seating groove in which the mold is accommodated is formed in the center of the body,

And a vertical guide corresponding to the guide groove of the metal mold may be provided in the mold seating groove.

The mold mounting means may be provided with a plurality of elastic supporting means around the mold receiving groove and the body in contact with the pipe for positioning the mold properly.

The mold mounting means is connected to a support rod on the body, and a pipe entrance portion having a conical shape may be formed in a direction opposite to a body to which the support rod is connected.

The main nut of the hydraulic device may be fixed to the lifting member through a stator.

An automatic tool changer (ATC) for replacing the screw rod is additionally provided in accordance with the size of the branch pipe to be plastic-molded in the pipe,

Wherein the automatic tool changer includes a plurality of screw rod assemblies in a radial direction, the screw rod assemblies being composed of a screw rod and a screw movable unit, the drive rod unit including a control motor and a speed reducer,

The driving unit may be supported by the elevating member of the hydraulic device by a connecting frame.

According to the automatic forming system of the T (T) type branch pipe of the metal pipe according to the present invention having the above-described configuration,

In the plastic forming process of the pipe (T) type branch pipe, the screw operation of the screw and the hydraulic device is completely automated by the organic construction of the screw moving part and the hydraulic device and the control operation by the control part, (T) -type branch pipes can be uniformly fired continuously and repeatedly, and at the same time, mass productivity can be ensured, thereby remarkably improving the uniformity of the pipe, the pipe quality and the productivity.

In addition, since the screw bar can be automatically replaced, various types of T (T) type branch pipes can be continuously formed, so that various types of T (T) type branch pipes can be formed accurately and quickly continuously.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partially omitted front view showing a configuration of an embodiment according to the present invention; Fig.
Fig. 2 is a side view of Fig. 1; Fig.
Fig. 3 is an enlarged view of an essential part of Fig.
4 is a uni-state diagram of Fig.
FIG. 5 is a partial cutaway view of a mold and a mold mounting means in an embodiment according to the present invention. FIG.
Fig. 6 is a view of the mold and the mold mounting means according to the present invention
a is a longitudinal sectional view, and b is an enlarged view of a AA line of a.
7 is a view of a clamping device according to an embodiment of the present invention
a is a partial plan view, and b is a front view.
8 is a partially omitted side view showing a configuration of an embodiment according to the present invention;
9 (a), 9 (b) and 9 (c) are views showing a process of descending a screw rod and fastening it to a mold according to an embodiment of the present invention.
10 (a), 10 (b) and 10 (c) are views showing a process of forming a branch pipe of a screw rod and returning a mold according to an embodiment of the present invention.
11A and 11B are views showing a state in which the screw rod is raised and then switched to an automatic tool changing state according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a T (T) type automatic tube forming system of a metal pipe according to the present invention will be described in detail with reference to the accompanying drawings.

A T-shaped automatic pipe forming system 1 for a metal pipe according to the present invention comprises a clamping device 10 for fixing a pipe P in which a hole P1 is perforated, A metal mold 20 positioned below the hole P1 for forming a T-shaped branch pipe on the pipe P and having a screw hole 21; , A screw rod (40) which is installed on the upper part of the hole (P1) of the pipe so as to be able to move up and down and to be fastened and unfastened to the mold (20) A driving means 50A including a rotary power transmitter 51 coupled to a screw rod to rotate the screw rod 40 in a forward and reverse direction and a supporting means 50B including a supporting nut 55 for moving the screw rod 40 are organically A screw movable part 50 to be coupled, and a lifting gear 61 which can be lifted by hydraulic pressure, A hydraulic device 60 in which a screw nut 40 is detachably attached to a screw main body 61 and the screw moving part 50 is supported and a driving device 50A of the screw moving part and a hydraulic device And a control unit (not shown) for controlling the operation of the control unit 60.

The screw rod 40 includes a first screw portion 41 which can be fastened to the mold 20 and a second screw portion 41 which is fastened to the support nut 55 and the main nut 63 And a key groove 45 for engaging with the rotary power transmitter 51 via the key 54 is formed to be long in the vertical direction across the hatch opening.

In the screw moving part, the driving means (50A) includes a control motor (52) for driving the rotary power transmitter (51), the rotary power transmitter (51) being a pulley or a gear,

The supporting means 50B includes at least one supporting nut 55 screwed to the screw rod 40 and a fixing device 56 for supporting the supporting nut 55 and connected to the elevator 61 of the hydraulic device ). ≪ / RTI >

When the rotary power transmitter 51 is a pulley, the control motor 52 is provided with a drive pulley and a belt 53 for transmitting the rotational force of the control motor 52 to the pulley. It is preferable that the timing belt be a timing belt capable of accurately transmitting the rotational force.

The screw moving part 50 is provided with a bearing 561 and a support nut 55 on the upper and lower sides of a rotary power transmitter about a rotary power transmitter 51 coupled to the screw rod 40, The apparatus 56 includes a bracket 563 provided between the bearing 561 and the support nut 55 and a connecting member 565 connecting the bracket 563 to the elevator 61 of the hydraulic apparatus .

The bearing 561 is a thrust bearing for freely rotating the rotary power transmitter 51 from the bracket 563.

The support nut 55 is supported by the bracket 563 and an elastic member 57 may be provided between the support nut 55 and the bracket 563. The elastic member 57 may be a spring washer have.

The screw movable part 50 having the above-described structure is provided with the screw rod 40 which is coupled to the rotary power transmitter and the key 54 by the driving of the control motor 52 as the driving means 50A and the rotation of the rotary power transmitter 51 While the supporting nut 55 which is screwed to the screw rod 40 is fixed and supported by the bracket 563 as the support means 50B so that the screw rod 40 is rotated simultaneously with the support nut 55 A vertical linear motion is performed.

At this time, since the key groove 45 is formed long in the screw rod 40, the key engagement with the rotary power transmitter 51 can be firmly maintained even when the screw rod 40 is raised or lowered.

Since the connecting member 565 to which the bracket 563 is fixed is supported by the elevating device 61 of the hydraulic device, the screw moving part 50 is always moved up and down together with the elevating device 61.

5 and 6, the metal mold 20 has an upwardly conical firing portion 23 and a return guide portion 24 downwardly conical below the firing portion 23, A guide groove 25 is vertically formed at the center of the lower portion of the return guide portion 24,

The mold mounting means 30 has a shape in which a cross section of the body 31 has a loose tolerance with respect to an inner diameter of the pipe and a part of an upper portion thereof is cut and a mold seating A groove 311 is formed and a vertical guide 37 corresponding to the guide groove 25 of the metal mold may be provided in the mold receiving groove 311. [

A guide mounting groove 313 may be formed at the center of the body 31 of the mold mounting means for positioning the vertical guide 37.

The mold mounting means 30 is provided with a plurality of elastic supporting means 33 around the mold seating groove 311 and the body 31 in contact with the pipe P in order to set the position of the mold 20 .

The elastic supporting means 33 may be formed of a spring 333 provided in the groove and a ball 331 supported by the spring by forming a groove in the body 31 of the mold mounting means ).

In this way, by providing the vertical guide 37 below the mold 20, the perpendicularity can be accurately set, and the elastic support means 33 can move the mold mounting means 30 and the mold 20 to the pipe So that the perpendicularity of the T (T) -shaped branch tube can be accurately formed.

The mold mounting means 30 is connected to a support rod 35 passing through a pipe to the body 31. A pipe inlet portion 315 in the form of a cone is provided in a direction opposite to the body 31 to which the support rod 35 is connected. ), And by this structure, it is possible to guide the conveyance of the pipe (refer to FIG. 5).

The hydraulic device 60 is for providing a strong vertical tension force to the screw rod 40 and the main nut 63 can be fixed to the elevator 61 through the stator 65. [

A pipe passage 67 through which a pipe can pass may be formed below the body of the hydraulic device 60 (see FIG. 8).

The main nut 63 has a flange and is fixed to the stator 65 and the stator 65 can be fastened to the stator 61.

The clamping device 10 may include a pair of clamping members 12 which are moved by the horizontal moving hydraulic device 11 in opposite directions on the circular cross section of the pipe, as shown in Fig.

The clamp member 12 may be in the form of a V block and is provided with a recessed space 121 through which a branch pipe P2 to be plastic-molded is drawn.

8, an automatic tool changer (ATC) 40 for exchanging the screw rod 40 according to the size of a branch pipe P2 to be plastic-molded in a pipe, A changer 70 is additionally provided.

The automatic tool changer 70 is provided with a plurality of screw rod bundles in the form of a bundle of screw rods 40 and screw movable parts 50 in the radial direction with a drive unit 71 using a control motor and a speed reducer as a center, The screw rods 40 are coupled to screw rods 40 of different sizes for the first screw 41 and the driving portion 71 is preferably supported by the elevating member 61 of the hydraulic device by the connecting frame.

The operation state of the T (T) -shaped automatic tube forming system 1 of the metal pipe according to the present invention having the above-described structure and the forming process of the T (T) -shaped tube will be described below.

The present invention relates to a method of manufacturing a pipe-type T-shaped branch pipe, comprising the steps of: rotating a screw rod (40) into and out of a mold (20) It is possible to divide the mold 20 into a secondary operating structure which requires a strong pulling force to pull up the mold 20 through the hole P1 of the pipe and to make the primary / .

The primary operation is for the screw rod 40 to be fastened and disengaged from the mold 20, and is operated by the screw moving part 50, and does not require a strong force but requires precise and accurate control.

The control motor 52 of the movable unit 50A is controlled by the control unit and the rotational force of the control motor 52 is transmitted to the screw rods 51 through the rotary power transmitters 51, 40 and a fixing device 56 including the supporting nut 55 and the bracket 563 as the supporting means 50B enables the screw rod 40 to be rotated up and down in the forward and reverse directions, So that the rod 40 can be accurately entered into the screw hole 21 of the mold.

The secondary operation is a process of plastic molding the tee (T) -type branch pipe (P2) through the hole (P1) formed in the pipe (P), and the die (20) The screw rod 40 is pulled up.

The screw rod 40 is rotated and elevated by the screw moving part 50 to be engaged with the main nut 63 fixed to the elevating device 61 of the hydraulic device (see FIG. 4).

As described above, the screw rod 40 follows the step of entering the screw hole 21 of the metal mold and the main nut 63 of the hydraulic device. At the time of the screw engagement, the rotation of the screw rod is accurately engaged If it does not start at the position, an error may occur in the progress of the fastening.

The elastic member 57 provided between the support nut 55 and the bracket 563 is for this purpose and is a screw thread of the screw rod 40 and a screw thread of the die or hole 21 or a screw thread of the main nut 63. [ The rotation and pressing pressure of the screw rod 40 expand and contract the elastic member 57 to adjust the entry of the screw rod 40 and find the engagement position.

Hereinafter, a process of forming a T (T) -shaped tube of a T (T) -shaped automatic tube forming system 1 of a metal pipe according to the present invention will be described with reference to the drawings.

9, the screw rod 40 is fastened to the main nut 63 (refer to FIG. 9A), and the screw rod 40 is fastened to the main nut 63, The hydraulic actuator 60 is operated to lower the elevating member 61 so that the descending of the elevating member 61 stops when the screw rod 40 approaches the mold 20 The control motor 52 as the driving means 50A of the control motor 52 is driven so that the screw rod 40 rotates and descends and enters the screw hole 21 of the mold as shown in FIG. .

Next, as shown in Fig. 10, the second process until the mold 20 forms the branch pipe P2 and returns is shown in Fig. 10, by the operation of the hydraulic device 60, The mold 20 is pulled up from the pipe P together with the screw rod 40 fastened to the main nut 63 and the T-shaped And the branch pipe P2 is plastic-molded (see Fig. 10a).

Thereafter, in order to return the mold 20 back into the pipe P, the lifting member 61 and the screw rod 40 are lowered by the operation of the hydraulic device 60 and the metal mold 20 fastened to the screw rod 40 is lifted, Enters the mold receiving groove 311 of the mold mounting means located in the pipe through the immediately-formed branch pipe P2 (see Fig. 10 (b)).

At this time, the return guide portion 24 of the mold is formed in a downwardly conical shape to facilitate entry of the mold into the branch pipe P2.

Thereafter, the screw rod 40 is lifted at the same time as the screw rod 40 is rotated by driving the control motor 52 to release the screw engagement with the mold 20 and to rise to the outside of the pipe (see c in Fig. 10) ) -Shaped tubing is completed.

The screw moving part 50 and the hydraulic device 20 at the time of completion of the cycle coincide with the immediately preceding step that the screw rod 40 which is the second step of the first step (see FIG. 9 b) is fastened to the mold 20 .

When one cycle of the tube forming process is completed, the pipe is transported by the separate pipe transfer device such that the next hole P1 of the pipe is positioned directly above the mold 20. [

The screw rod 40 is rotated and lowered by the control motor 52 of the screw moving part 50 and is fastened to the mold 20 to proceed to the next cycle. It can be uniformly molded.

On the other hand, when forming a plurality of T-type branch pipes having different specifications in one pipe, the screw rod can be exchanged using the automatic tool changer (70).

The automatic replacement of the screw rod 40 is carried out by raising the elevator 61 and the screw moving part 50 by operating the hydraulic device in the cycle completion step (see c in Fig. 10) The screw rod 40 is moved downward by driving the control motor 52 to disengage the screw rod 40 from the main nut 63 so that the screw rod 40 and the screw moving part 50 The screw rod bundle is freed from the hydraulic device 60 (see Fig. 11 (b)).

Thereafter, the automatic tool changer 70 is operated to move the screw rod bundle having the screw bar 40 of the standard, so that the screw bar 40 of the standard is moved vertically to the main nut 63 and the mold 20 It is possible to proceed to the forming step of a tee-type tube of another standard because it is located on the same center line. In this way, a tee-type tube having various specifications can be continuously and automatically fired.

The series of operation progresses until the mutual organic operation of the control motor 52 of the screw moving part 50 and the hydraulic device 60 and the automatic tool changer 70 are added, The control can be repeatedly and precisely performed.

As described above, the automatic forming system of the T (T) type pipe of the metal pipe according to the present invention is characterized in that in the plastic forming of the T (T) type branch pipe, the organic constitution of the screw moving part and the hydraulic device, The screw rod fastening to the mold is completely automated by the operation, so that the squareness of the multiple tubes to be formed can be uniformly fired continuously and repeatedly and at the same time, the mass productivity can be ensured, Productivity can be improved dramatically, and the screw bar can be automatically replaced, so that various types of T (T) type tubes having different specifications can be continuously and accurately formed.

In the foregoing, preferred embodiments of the present invention have been described with reference to the accompanying drawings. Here, the terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings, but should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

1: T (T) type branch pipe automatic forming system of the metal pipe of the present invention
P: Pipe P1: Hole P2: Branch pipe
10: clamp device 11: horizontal moving hydraulic device 12: clamp block
20: mold 21: screw hole 30: mold mounting means
31: body 311: mold seating groove 313: guide mounting groove
33: elastic support means 331: ball 333: spring
37: vertical guide 40: screw rod 41: first threaded portion
42: second screw portion 45: key groove 50: screw moving portion
50A: driving means 50B: supporting means
51: Rotational power transmitter (pulley) 52: Control motor
53: belt 54: key 55: support nut
56: Fixing device 561: Bearing 563: Bracket
565: connecting member 57: elastic member 60: hydraulic device
61: lifter 63: main nut 65: stator
70: automatic tool changer 71:

Claims (10)

A clamping device (10) for fixing the pipe (P) whose hole (P1) is perforated;
A mold 20 positioned below the hole P1 and having a screw hole 21 for forming a tee-type branch pipe on the pipe P;
A mold mounting means (30) for positioning the mold (20) at a corresponding position in the pipe;
A screw rod (40) mounted on the upper portion of the hole (P1) of the pipe so as to be vertically movable and rotatable and to be fastened and unfastened to the mold (20);
A driving means 50A including a rotary power transmitter 51 coupled to a screw rod for rotating the screw rod 40 in normal and reverse directions and a supporting nut 55 for moving the screw rod 40 up and down. A screw movable part 50 to which the second movable member 50B is organically coupled;
And a screw nut (63) which is detachable from the screw rod (40) is provided on the elevating member (61) and the screw moving part (50) is supported by the hydraulic device 60); And
And a control unit for controlling the operation of the driving unit 50A and the hydraulic unit 60 of the screw moving unit,
The screw rod 40 includes a first screw portion 41 that can be fastened to the mold 20 and a second screw portion 41 that is fastened to the support nut 55 and the main nut 63 of the hydraulic device, Wherein a key groove (45) for engaging with the rotary power transmitter (51) via a key (54) is formed to be long in a vertical direction between the hatching openings, and a second screw portion (42) (T) type automatic tube forming system. delete The method according to claim 1,
In the screw moving part 50,
The driving means 50A includes a control motor 52 for controlling the rotary power transmitter 51 so that the rotary power transmitter 51 becomes a pulley or a gear,
The supporting means 50B includes at least one supporting nut 55 screwed to the screw rod 40 and a fixing device 56 for supporting the supporting nut 55 and connected to the elevator 61 of the hydraulic device (T) -shaped automatic tube forming system of a metal pipe. The method of claim 3,
The screw moving part 50 is provided with a bearing 561 and a supporting nut 55 on the upper and lower sides of a rotary power transmitter about a rotary power transmitter 51 coupled to the screw rod 40,
The fixing device 56 includes a bracket 563 provided between the bearing 561 and the support nut 55 and a connecting member 565 connecting the bracket 563 to the elevator 61 of the hydraulic device (T) -shaped tube automatic forming system of a metal pipe. The method of claim 4,
The support nut 55 is supported by the bracket 563 and an elastic member 57 is provided between the support nut 55 and the bracket 563. The metal pipe T- system. The method according to claim 1,
The mold 20 is provided with a branch pipe firing section 23 having an upwardly conical shape and a return guide section 24 having a downwardly conical shape below the branch pipe firing section 23, A guide groove 25 is vertically formed at the lower center,
The mold mounting means 30 has a shape in which a cross section of the body 31 has a loose tolerance with respect to an inner diameter of the pipe and a part of an upper portion thereof is cut and a mold seating A groove 311 is formed,
And a vertical guide (37) corresponding to the guide groove (25) of the metal mold is installed in the die receiving groove (311). The method of claim 6,
The mold mounting means 30 is provided with a plurality of elastic supporting means 33 around the mold receiving groove 311 and the body 31 for contacting the pipe in order to set the position of the mold 20 T (T) type branch pipe automatic forming system of metal pipe. The method according to claim 1,
The mold mounting means 30 has a support rod 35 connected to the body 31 and a pipe entrance portion 315 having a conical shape is formed in a direction opposite to the body 31 to which the support rod 35 is connected (T) type automatic pipe forming system of metal pipe. The method according to claim 1,
Wherein the main nut (63) of the hydraulic device is fixed to the lifting body (61) through a stator (65). The method according to claim 1,
An automatic tool changer (ATC) 70 for exchanging the screw rod 40 is additionally provided in accordance with the size of the branch pipe P2 to be plastic-molded in the pipe,
The automatic tool changer 70 includes a plurality of screw rod bundles radially formed by a screw rod 40 and a screw movable part 50 around a driving part 71 using a control motor and a speed reducer,
Wherein the driving unit (71) is supported by a lifting member (61) of the hydraulic device by a connecting frame.

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