KR102204518B1 - Copander machine - Google Patents

Abstract

The present invention provides a copander machine that supplies a pipe to a straightening unit in a clamped state, and allows rapid replacement of a mold liner for straightening a pipe.
The present invention for realizing this is in a copanda machine for correcting the bending deformation formed on the outer diameter of a pipe, a feeding unit having at least one roller on which a pipe is mounted, and located at the entrance of the feeding unit and placed on the roller. At least one mold liner disposed at the center of the feeding unit and configured to pressurize the outer diameter of the pipe moved through the supply unit, the supply unit for pushing the clamped pipe forward by riding the roller while the pipe is clamped A straightening unit comprising, a state positioned at the outlet of the feeding unit and placed in the front roller of the feeding unit by driving a moving rail, and enters the mold liner of the straightening unit by driving the roller to move the mold liner into the mold liner. It characterized in that it comprises a mold replacement unit for replacement by pulling out to the front of the feeding unit.

Description

Copander machine {COPANDER MACHINE}

The present invention relates to a copander machine, and more particularly, to a copander machine that supplies a pipe to a straightening unit in a clamped state, and allows rapid replacement of a mold liner for straightening a pipe. .

In general, pipes are generally formed through either a drawing method or a forming method.

As a representative prior art related to the latter forming method, there is Korean Patent Office Registered Utility Model Publication No. 20-0326241 (automatic pipe forming machine) (hereinafter referred to as prior art).

The prior art includes a material supply unit that supplies a material, a material transfer unit that transfers the material supplied through the material supply unit in a longitudinal direction so that it can be put into a molding machine, and the material transferred from the material transfer unit is fixed without twisting left or right. A material setting unit that is set to be transferred to a position, a material forming unit that forms a pipe shape of a desired shape by sequentially bending the forming unit to bend the material set in the material setting unit, and the shape of the material formed from the material forming unit A joint crimping part provided with rollers that squeeze the outer circumferential surface so that the joints formed in the retaining and longitudinal directions can be in contact with each other, a welding part for joining the joints of the material with an automatic welding machine, and discharge to transport the finished pipe to the outside of the molding machine Consists of wealth.

On the other hand, the pipe formed into a circular shape through the above process is transferred to a welding machine, and then the grooves formed at both ends thereof are joined by welding to manufacture a tack-welded pipe. At this time, in the welding welding method, the pipe is continuously moved horizontally and passed through a fixed welding device, and the grooves of the pipe are sequentially welded.

However, for pipes molded in the above manner, partial bending deformation occurs as stress is continuously applied along the outer diameter of the pipe during the forming process. Therefore, in the production plant that forms the pipe, the pipe is formed in a cylindrical shape and then formed. A device capable of correcting the bending deformation formed on the outer diameter of the pipe is required, and such a device is commonly referred to as a copander machine.

As a representative prior art related to the co-panda machine, Korean Patent Office Registered Patent Publication No. 10-1528623 (co-panda machine) is exemplified.

The prior art includes a housing, a fixed ring frame fixedly installed at the rear of the housing, at least one cylinder installed along the front circumference of the fixed ring frame, and located in front of the fixed ring frame and coupled to the rod of the cylinder. A reciprocating ring frame that moves horizontally before and after by the operation of the cylinder in a state, a slider that is installed along the front circumference of the reciprocating ring frame and moves horizontally before and after the reciprocating ring frame, and a lower end of the slider The inclined surface portion formed in the slider is abutted at right angles to the tip of the slider, and the upper end thereof is in surface contact with the inclined surface portion of the slider

The inclined surface portion is formed to perform vertical movement of the slider up and down according to the horizontal movement of the slider, and is installed at the lower end of the working table and pressurizes the outer diameter of the pipe according to the vertical movement operation of the working table. Make up.

However, in the prior art, in order to transfer the pipe to the straightening unit, it is transferred to the straightening unit in the front by riding the roller, which is a feeding unit, in the state where the pipe is not fixed. There is a problem in that malfunctions often occur in placing the pipe in place, so that calibration work cannot be performed with a uniform pressure on the outer diameter of the pipe.

In addition, the replacement of the liner provided in the calibration unit is a process of releasing the bolts that connect and fix each liner, separate the liners one by one, and then connect the new liners with bolts. Not only is the replacement work very cumbersome, but there is also a disadvantage of lowering productivity due to unnecessary delays in working time due to replacement.

Document 1: Korean Intellectual Property Office Registered Patent Publication No. 10-1528623 Document 2: Korean Intellectual Property Office Registration Utility Model Publication No. 20-0326241 Document 3: Korean Intellectual Property Office Registered Patent Publication No. 10-0897986

Accordingly, an object of the present invention for solving the above-described problems is to provide a copanda machine that prevents pipe flow during transport by transporting the pipe to the straightening unit by riding the roller while clamping the pipe.

Another technical problem to be achieved by the present invention is to provide a co-panda machine capable of rapidly performing clamping of a mold liner in a one-touch manner.

Another technical problem to be achieved by the present invention is to provide a co-panda machine capable of performing replacement work of a mold liner at a time through a mold replacement unit.

The present invention for achieving the above objects is a copander machine for correcting a bending deformation formed on an outer diameter of a pipe, a feeding unit having at least one roller on which a pipe is mounted, and positioned at an inlet of the feeding unit, wherein the A supply unit that pushes the clamped pipe forward while riding the roller while the pipe placed on the roller is clamped, at least one disposed at the center of the feeding unit and pressurizing the outer diameter of the pipe moved through the supply unit A straightening unit including the above mold liner, located at the outlet of the feeding unit and placed in the front roller of the feeding unit by driving a moving rail, and entering the mold liner of the straightening unit by driving the roller to the mold It characterized in that it comprises a mold replacement unit for replacement by removing the liner to the front of the feeding unit.

The supply unit consists of a bogie that moves before and after riding on a rail installed on the floor by the power of the driving unit, and a tilting arm whose end is hingedly coupled to the top of the bogie, and tilts around the hinge by the power of a cylinder. A moving means, a clamping means that is supported at the tip of the tilting arm and pressurizes the inner diameter of the pipe by entering the inside of the pipe while being positioned at the center of the pipe placed on the feeding unit according to the rotational motion of the tilting arm. It is characterized by composition.

The calibration unit is disposed on both sides of the upper and lower bases, the upper and lower bases, and the through holes, which are arranged up and down with a through hole through which the pipe passes to the center, and pressurizes the pressure by the power of the cylinder. Pressing device configured as a bar, with one end in contact with the inner surface of the pressurizing table and the other end in contact with the outer diameter of the pipe passing through the through hole, and pressurizing the inner diameter of the pipe with the pressure of the pressurizing table to correct bending deformation. It is desirable to configure.

First and second brackets installed on the outer surface of the pressurizing table spaced apart from each other by a predetermined distance, a cylinder coupled to the first bracket by a first hinge, and a pin coupled to the rod of the cylinder, and the lower end thereof is the second bracket and the second hinge. It is preferable to further install a mold liner clamping means composed of a locker that is coupled and tilts the second hinge from a starting point according to the driving of the cylinder and is caught in a rocker groove formed on the outer surface of the mold liner.

The mold replacement unit is a transfer rail, a body that moves to the feeding unit according to the driving of a roller provided on the transfer rail while being mounted on the transfer rail, and moves in the direction of the straightening unit according to the driving of the roller of the feeding unit, It is preferable to include an arm installed at the rear of the body, and a gripper installed on the arm and entering a hole formed in the center of the mold liner clamped to the correction unit according to the movement of the body.

The present invention prevents pipe flow during transfer by transferring the pipe to the mold liner of the straightening unit while clamping the pipe by the clamping means so that it does not shake in the process of transferring the pipe to the roller, so that the pressure transmitted from the mold liner is It has the effect of preventing the pipe from being biased and preventing defects in the pipe being straightened.

In addition, the clamping and unclamping operation of the mold liner can be quickly performed in a one-touch method, and the mold liner can be replaced at a time through the mold replacement unit, thereby realizing the simplicity of the operation according to the mold replacement work. Has an effect.

1 is a view showing the configuration of a copender machine according to a preferred embodiment of the present invention from above.
Figure 2 is a view showing the side of Figure 1;
3 is a view showing an extract of the feeding unit shown in FIG. 1;
Figure 4 is a view showing the front of the pipe supply unit shown in Figure 1;
Figure 5 is a view showing the plane of Figure 4;
Figure 6 is a view showing a side of Figure 4;
Figure 7a is a view showing an extract of the structure of the clamping means constituting the pipe supply unit of Figure 4;
Fig. 7B is a front view of Fig. 7A.
Figure 8a is an operating state diagram of the clamping means of Figure 7a.
Fig. 8B is a front view of Fig. 8A.
9 is a view showing a side of the calibration unit shown in FIG.
10 is a view showing a mold liner and liner clamping means in the calibration unit in FIG. 9;
Figure 11 is a side view of Figure 10;
Fig. 12 is a front view of the liner clamping means of Fig. 10;
Figure 13 is a side view of the clamping means of Figure 12;
14 is a plan view showing a mold replacement unit shown in FIG. 1.
15 is a front view of FIG. 14;

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the detailed description to be described later, representative embodiments in the present invention will be presented in order to achieve the above-described technical problem. And other embodiments that may be presented by the present invention are replaced by descriptions in the configuration of the present invention.

1 is a plan view showing the configuration of a copander machine to be implemented in the present invention, and FIG. 2 is a front view of FIG. 1.

1 and 2, the copanda machine of the present invention includes a feeding unit, a calibration unit C installed in the center of the feeding unit installed at the inlet side of the feeding unit, and the outlet side of the feeding unit. It consists of a mold replacement unit to be installed.

The feeding unit is a unit for transferring the pipes (P), which have been primarily formed, to the straightening unit (C), and is configured by arranging a plurality of them in the same structure on a bed lying horizontally.

3 is a view showing the structure of the feeding unit. As shown in Figure 3, the feeding unit (A) is a pipe (P) is raised, the roller 10 rotates by the power of the drive motor 11, and the pipe (P) in a state that supports the roller (10). It comprises an up-down device 12 for raising and lowering the roller 10 according to the size of the diameter.

The up-down device 12 adjusts the height of the pipe (P) to the diameter size of the pipe (P) so that the pipes (P) manufactured in various diameter sizes can accurately enter the through hole center of the calibration unit (C). It is a means of controlling this.

The supply unit (B) is located at the inlet side of the feeding unit (A) (on the left side of the feeding unit (A) in the drawing), and clamping the pipe (P) placed on the feeding unit (A) is clamped. It is a unit that pushes the old pipe (P) forward and supplies it to the calibration unit (C).

Attached Figure 4 is a view showing the front of the pipe supply unit shown in Figure 1, Figure 5 is a view showing the plane of Figure 4, Figure 6 is a view showing the side of Figure 4.

As shown in Figs. 4 to 6, the supply unit (B) is configured by being divided into a front and a rear transfer means 20 and a clamping means 40.

The front and rear transfer means 20 are means for pushing the pipe P placed in the feeding unit A forward and entering the calibration unit C while supporting the clamping means 40, and the power of the driving source A bogie 22 that reciprocates before and after riding on the rail 24 installed on the floor is provided.

A support frame 32 is installed on the upper surface of the bogie 22, and the end of the tilting arm 34 is coupled to the hinge 36 to the support frame 32, and the clamping is performed at the tip of the tilting arm 34. Means 40 are supported.

A rod of the cylinder 38 installed on the bogie 22 is coupled to the lower end of the tilting arm 34, and the tilting arm 34 is driven by the rod that is pulled out and retracted by the power of the cylinder 38. ) Performs a rotation operation based on the hinge 36.

The clamping means 40 supported by the tip of the tilting arm 34 through the rotational operation of the tilting arm 34 is positioned at the center of the inlet side of the pipe P.

The drive source for moving the bogie 22 of the front and rear transfer means 20 is a motor 26, a pinion 28 coupled to the shaft of the motor 26, and the rail 24 engaged with the pinion 28. ) And the rack 30 disposed in parallel in the longitudinal direction. When the pinion 28 rotates by the power of the motor 26, the pinion 28 moves along the rack 30 and moves the bogie 22 forward and backward.

The clamping means 40 is positioned at the center of the inlet side of the pipe P by the operation of the tilting arm 34 while being supported by the ends of the tilting arm 34 of the front and rear transfer means 20 , It is a means for fixing the pipe (P) so as not to shake by pressing the pressure frame (70) to the inner diameter of the pipe (P) in the state of entering the pipe (P) by the movement of the bogie (22).

7A to 8B are views showing the clamping means. As shown, the clamping means 40 includes a fixed tube 42 fixed to the tip of the tilting arm 34.

A cylinder 44 is mounted at the rear of the fixed tube 42 and a shaft 46 coupled to the rod of the cylinder 44 is installed therein. The shaft 46 performs a reciprocating movement before and after using the power of the cylinder 44.

The front end of the shaft 46 is exposed to the outside of the front of the fixed tube 42, and a fixed sleeve 48 and a moving sleeve 60 are fitted to the outer diameter of the exposed shaft 46, respectively.

The fixing sleeve 48 is a member that is fitted with a bolt 49 to the front of the fixing tube 42 in a state that is slip-fitted to the outer diameter of the tip of the shaft 46. That is, even if the shaft 46 performs reciprocating movement before and after, the fixed sleeve 48 does not move together with the shaft 46 and maintains a fixed state.

A connecting frame 50 is installed on the outer diameter of the fixed sleeve 48, a guide 52 is installed on the connecting frame 50, and the end of the link 54 is a hinge 56 on the guide 52 It is coupled, the end of the pressure frame 70 is pin-coupled to the front end of the link 54. In addition, one end of the guide link 58 is pin-coupled to the link 54, and the other end of the guide link 58 is connected to the guide hole 53 of the guide 52 by a pin 59. Move through the hole 53.

The movable sleeve 60 is a member fixedly installed on the outer diameter of the tip end of the shaft 46 while being positioned in front of the fixed sleeve 48. In other words, unlike the fixed sleeve 48, the moving sleeve 60 performs a moving operation together according to the reciprocating movement of the shaft 46 before and after.

A connecting frame 62 is installed on the outer diameter of the moving sleeve 60, a guide 64 is installed on the connecting frame 62, and the end of the link 66 is a hinge 68 on the guide 64 It is coupled, the front end of the pressing frame 70 is pin-coupled to the front end of the link 66. In addition, one end of the guide link 69 is pin-coupled to the link 66, and the other end of the guide link 69 is connected to the guide hole 65 of the guide 64 by a pin 67. Go through the hole (65).

The pressing frame 70 is pin-coupled with the links 54 and 66 provided in the fixed sleeve 48 and the moving sleeve 60, respectively, and links according to the movement motion of the moving sleeve 60 before and after It moves in the outward and inward directions according to the unfolding and folding motions of the (54, 66) and is compressed to the inner diameter of the pipe (P).

Specifically, when the moving sleeve 60 moves backward according to the movement of the shaft 46, the link 66 and the fixed sleeve 48 are hinged to the LM guide 64 of the moving sleeve 60. ), the hinge 56 coupled to the LM guide 52 of the link 54 performs an operation of spreading out from each of the hinges 56 and 68, and the pressure frame 70 is spread outward with this It is compressed to the inner diameter of the pipe (P) to pressurize the pipe (P).

The pressing frame 70 is preferably configured by arranging at least one or more, in the present invention, six along the outer diameter of the shaft 46 with the same structure.

The calibration unit (C) is a means provided for the purpose of correcting the distortion and deformation formed in the outer diameter of the pipe (P) to correct the roundness.

9 to 11 are diagrams showing excerpts of the structure of the calibration unit.

As shown, the calibration unit constitutes an outer frame, and the upper and lower bases 80 and 82 are arranged up and down with a space for the pipe P to pass through the center, and the upper and lower bases ( 80, 82) and pressurizing the outer diameter of the pipe (P) which is installed on both sides of the space between the upper and lower bases (80, 82) and entered the through hole of the upper and lower bases (80, 82) It comprises a device (86).

The pressing device 86 includes a cylinder 88 and a pressurizing table 90 which is connected to the rod of the cylinder 88 and presses the outer diameter of the pipe P with the power of the cylinder 88.

As mentioned above, the pressing device 86 has the same structure, and four units are installed on both sides of the space between the upper and lower bases 80 and 82 and the upper and lower bases 80 and 82, respectively. The large pressing device 86 simultaneously presses the outer diameter of the pipe P to hold the bending deformation of the pipe P.

A mold liner is installed on the inner surface of the pressurizing table 90 of the pressing device 86 to transmit the pressure of the pressurizing table to the outer diameter of the pipe.

10 and 11, the outer surface of the mold liner is in contact with the inner surface of the pressurizing table 90, as mentioned, and the inner surface of the mold liner is in contact with the outer diameter of the pipe P. Make it possible to deliver uniformly to the outer diameter of the pipe (P). At this time, the inner surface of the mold liner 100 is preferably formed to be bent according to the outer diameter shape of the pipe (P), and the mold liner 100 having this structure is 4 according to the number of pressers 90 of the above-described pressing device. Have a dog.

A rocker groove 102 is formed on the outer surface of the mold liner 100, and a locker 124, which is a mold liner clamping means 110, is fitted in the rocker groove 102, and the mold liner 100 is pressed against the pressing table 90. ) To be fixed and unfixed.

As shown in Figs. 12 to 13, the mold liner clamping means 110 is a member for fixing and releasing the mold liner 100 to the pressing table 90, as mentioned above, and the pressing table 90 ) The first and second brackets 112 and 114 installed to be spaced apart from each other by a predetermined distance, a cylinder 118 coupled to the first bracket 112 by a first hinge 116, and a rod of the cylinder 118 It is pin-coupled to 120, and its lower end is coupled with the second bracket 114 and the second hinge 122, and the cylinder 118 is driven by a tilting operation from the second hinge 122 as a starting point, and the mold It consists of a locker 124 that is caught in the rocker groove 102 formed on the outer surface of the liner 100.

On the other hand, the mold replacement unit (D) is disposed at the outlet side of the feeding unit (A) and is provided for the purpose of replacing the mold liner (100) clamped to the pressure base (90) of the calibration unit (C) with a new one. to be.

14 to 15 are views showing the structure of the mold replacement unit extracted.

As shown, the mold replacement unit D includes a body 140 and a moving rail 130 for moving the body 140 to the feeding unit A while supporting the body 140. .

The body 140 placed on the moving rail 130 is moved to the rear by driving the roller 132 provided on the moving rail 130, and the moved body 140 is at the outlet side of the feeding unit A. In the state of being placed in the roller 132, the roller of the feeding unit A is moved to the straightening unit.

An arm 146 is installed on the rear surface of the body 140 with a height adjusting means therebetween. The arm 146 is provided with a grip unit 150 that is fitted in the center of the mold liner 100 and grips the mold liner 100.

The height adjustment means is a means provided for the purpose of adjusting the height of the grip unit 150 according to the size of the mold liner 100, the height adjustment means is a fixed rail 142 mounted at the rear of the body 140, the A moving rail 144 mounted on the arm 146 and mounted between the arm 146 and the body 140 is fitted to the fixed rail 142 so as to move up and down, and the arm 146 is moved up and down. It consists of a cylinder 148 that moves downward.

When the mold liner 100 is replaced, the mold replacement unit D unclamps the mold liner 100, which is clamped to the pressing table 90 of the calibration unit C, and then the roller of the moving rail 130 (132) is driven to enter the body 140 toward the outlet of the feeding unit (A), and then the rollers of the feeding unit (A) are driven, and the body 140 is moved to the rear so that the correction unit (C) is It enters the mold liner 100.

Next, the grip unit 150 connected to the body 140 by the arm 146 enters the center of the mold liner 100 and grips the mold liner 100, and then moves forward to move the mold liner 100 It is removed from the pressurizing table 90 of the calibration unit (C).

After the removal of the mold liner 100 is performed as described above, the new mold liner is re-entered into the pressurizing table 90 of the calibration unit C by the above operation, and then a new mold is used by the mold liner clamping means 110. By clamping the liner, it is possible to quickly change the mold liner at a time.

Hereinafter, the operation of the copanda machine according to the present invention will be described with reference to FIGS. 1 to 15.

In the copander machine of the present invention, after the pipe (P) is placed in the roller (12) of the feeding unit (A), the clamping means (40) of the supply unit (B) clamps the pipe (P), before and after The movement of the moving means (20) allows the pipe (P) to enter the front calibration unit (C), and in this state, the pressure base (90) of the calibration unit (C) intermittently presses the outer diameter of the pipe (P). And correct the shape deformation of the pipe.

Specifically, the tilting arm 34 provided in the front and rear moving means 20 rotates the hinge 36 as a starting point by driving the cylinder 148 while supporting the clamping means 40 and clamping means. Place (40) in the center of the pipe (P).

Next, when the cylinder 44 of the clamping means 40 is driven and pulls the shaft 46 to the rear, the fixed sleeve 48 maintains a fixed state, while the moving sleeve 60 moves backward. In this case, the link 66 coupled with the hinge 68 to the LM guide 64 of the movable sleeve 60 and the link 54 coupled with the hinge 56 to the LM guide 52 of the fixed sleeve 50 ) Performs an operation of spreading each hinge (56, 68) as a starting point, and in this process, the pressing frame (70) opens outward and is compressed to the inner diameter of the pipe (P) to pressurize and fix the pipe (P). Is done.

After the pipe (P) is clamped to the clamping means (40), the driving units of the front and rear moving means (20) are driven and the bogie (22) is moved forward along the rail (24), and accordingly, the clamping means The pipe (P) clamped to (40) enters the space between the upper and lower bases (80, 82) of the straightening unit (C) by riding the rollers 12 of the feeding unit (A) without shaking.

Next, the cylinder 88, which is the pressing device of the calibration unit C, is driven and pushes the pressurizing table 90, which is clamped by the mold liner clamping means 110 on the inner surface of the pressurizing table 90. The plurality of mold liners 100 pressurize the outer diameter of the pipe P while in contact with the outer diameter of the pipe P to press the distortion deformation formed on the outer diameter of the pipe P to correct the roundness.

On the other hand, when the roundness of the pipe (P) with a different diameter needs to be corrected during the calibration process of the pipe (P), it must be replaced with another mold liner suitable for it, and this mold liner replacement operation is performed by the mold liner clamping means of the present invention. It is quickly achieved through the clamping operation and the operation of the mold replacement unit.

First, when the cylinder 118 of the mold liner clamping means 110 clamping the mold liner 100 to the pressurizing table 90 is operated, the locker 124 pin-coupled to the rod of the cylinder 118 is removed. 2 It is separated from the rocker groove 102 formed on the outer surface of the mold liner 100 by tilting and rotating from the second hinge 122 of the bracket 114, and the mold liner through the separation of the locker 124 (100) is released from the pressurizing table (90).

Next, when the roller 132, which is the moving rail 130 of the mold replacement unit D, is driven, the body 140 placed in the roller 132 enters the roller 12 at the outlet side of the feeding unit A. Then, by driving the rollers 12 of the feeding unit A, the body 140 moves toward the straightening unit C at the rear.

Next, the grip unit 150 installed on the arm 146 of the body 140 is inserted into the center of the mold liner 100 located in the unclamped state on the pressurizing table 90 of the calibration unit C. After gripping 100, the body 140 moves forward on the roller 12 again, exits through the outlet of the feeding unit A, and then rides the roller 132 of the moving rail 130 in the initial state. Will return to

Subsequently, the new mold liner 100 to be replaced is gripped by the grip part 150 of the body 140, and then the body 140 is entered into the correction unit C in the manner mentioned above, so that the mold liner 100 The upper and lower bases 80 and 82 are positioned in the through hole, and then the cylinder 118 of the mold liner clamping means 110 operates, and the locker 124 is formed in the changed mold liner 100 By hanging on the groove 102, the replacement work of the mold liner 100 can be quickly performed at a time.

A: Feeding unit
B: Supply unit C: Calibration unit
10: bed 14: up-down device
80: pressing device

Claims (6)

In the copander machine that corrects the bending deformation formed in the outer diameter of the pipe,
A feeding unit (A) having at least one roller 12 on which the pipe (P) is placed;
A supply unit that is located at the entrance of the feeding unit (A) and moves the clamped pipe (P) forward by riding the roller (12) while clamping the pipe (P) placed on the roller (12). (B);
A calibration unit (C) disposed in the center of the feeding unit (A) and including at least one mold liner (100) for pressing the outer diameter of the pipe (P) moved through the supply unit (B);
It is located at the outlet of the feeding unit (A) and is placed in the roller 12 on the outlet side of the feeding unit (A) by the drive of the moving rail (130), and the straightening unit (C) is driven by the roller (12). ) To enter the mold liner 100 and remove the mold liner 100 to the front of the feeding unit A to replace the mold liner 100;
The calibration unit (C);
Upper and lower bases 80 and 82 arranged up and down with a space through which the pipe P passes to the center;
At least one of the upper and lower bases (80, 82) and the upper and lower bases (80, 82) are disposed on both sides of the space, respectively, and composed of a pressurizing base (90) that performs a pressing operation by the power of the cylinder (88). A pressing device 86;
In a state in which one end is in contact with the inner surface of the pressurizing table 90 and the other end is in contact with the outer diameter of the pipe P passing through the space, the inner diameter of the pipe P is pressed with the pressure of the pressurizing table 90 It consists of at least one mold liner 100 for correcting the bending deformation;
First and second brackets 112 and 114 installed to be spaced apart from each other by a predetermined distance on the outer surface of the pressurizing table 90;
A cylinder 118 coupled to the first bracket 112 by a first hinge 116;
Pin-coupled to the rod of the cylinder 118, its lower end is coupled with the second bracket 114 and the second hinge 122, and the second hinge 122 as a starting point according to the driving of the cylinder 118 A copander machine, characterized in that a mold liner clamping means 110 comprising a rocker 124 that is tilted and is caught in the rocker groove 102 formed on the outer surface of the mold liner 100 is further installed


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