KR101747996B1 - 2-Head 2-Radius system bending machine - Google Patents

Abstract

A two-head two-radios system bending machine is disclosed. According to an embodiment of the present invention, there is provided a bending machine for bending a tube that has undergone a pre-treatment process by loading the tube into a carriage, the bending machine comprising: a high frequency heater for locally heating a tube to be loaded; A base frame provided on one side of the high-frequency heater; A pair of conveyance frames installed on the base frame so as to be capable of reciprocating movement; A bender frame vertically installed on each of the transport frames; A bending mold having a top bending die rotatably mounted on an upper portion of each of the bender frames, a top bending die disposed at an upper portion thereof, and a bottom bending die disposed at a lower portion thereof, And a side booster installed at one side of the bottom bending die and the top bending die and equipped with a pair of pressure dies capable of sliding operation by the second hydraulic cylinder to clamp the tube, The pressure die of the first bending die is bent to one side by sliding operation by the operation of the third hydraulic cylinder on the slide groove formed on the side booster on the side booster so as to be slidable in the bending direction with the tube clamped, So that bending can be performed in a right-left direction.

Description

2-Head 2-Radius system bending machine}

The present invention relates to a two-head 2-radios system bending machine, and more particularly, to a bending machine for a two-head 2-radials system which can bend a large-capacity coil for a boiler continuously from side to side using a tube, Dual-headed two-radios system bending machine.

Normally, a large-capacity boiler coil has a length of about 60 m, so that such a boiler coil can not be bent into a zigzag shape using a tube

As a result, the conventional long tube is cut to a predetermined length and is manufactured by a welding operation, resulting in extremely low working efficiency, and a great number of problems such as a reduction in human power consumption and machining accuracy.

Recently, to solve such a problem, a technique such as a "pipe bending device" (prior art) has been proposed in Japanese Laid-Open Patent Publication No. 10-2009-0058091 (June 9, 2009).

The above-described prior art has a first housing provided with a first shaft rotated by the power of the first cylinder, a second housing provided below the first housing and being eccentrically disposed on one side of the first shaft, A second housing coupled to an upper end of a first shaft of the first housing and having a first shaft and a second shaft rotatably mounted on the first housing and having a second shaft for eccentrically rotating a first shaft; And a pair of first and second rollers provided on the upper end of the eccentric plate so as to be in line with the first and second axes, And the second roller is configured to bend the pipe by rotating along the circumference of the first roller by an eccentric rotation operation of the eccentric plate in a state where the second roller is eccentrically positioned to one side of the first axis, One roller is characterized in that configured to rotate along the periphery of the second roller to the eccentric rotation of the eccentric plate, and bending the pipe in a state located to be eccentric toward the other in the second axis.

This conventional technique has the effect of shortening the manufacturing process time, precision and quality by automatically performing bending, but it is difficult to work such as bending a plurality of tubes or bending tubes at the same time because the mechanism of bending is complicated.

Embodiments of the present invention can be used for a large-capacity boiler coil by bending a tube that has been subjected to a pre-process operation to a predetermined length, and a pair of bending molds are provided on the right and left sides to continuously bend the tube in the left- To be able to provide a 2-head 2-radios system bending machine.

Particularly, the present invention provides a two-head two-radial type bending machine capable of maximizing the working efficiency, shortening the working time, highly precisely machining the bending tube, and performing bending work even when the diameter of the tube is different. System bending machine.

According to an aspect of the present invention, there is provided a bending machine for bending a tube that has undergone a pre-treatment process by loading the tube with a carriage, the bending machine comprising: a high frequency heater for locally heating a tube to be loaded; A base frame provided on one side of the high-frequency heater; A pair of conveyance frames installed on the base frame so as to be capable of reciprocating movement; A bender frame vertically installed on each of the transport frames; A bending mold having a top bending die rotatably mounted on an upper portion of each of the bender frames, a top bending die disposed at an upper portion thereof, and a bottom bending die disposed at a lower portion thereof, And a side booster installed at one side of the bottom bending die and the top bending die and equipped with a pair of pressure dies capable of sliding operation by the second hydraulic cylinder to clamp the tube, The pressure die of the first bending die is bent to one side by sliding operation by the operation of the third hydraulic cylinder on the slide groove formed on the side booster on the side booster so as to be slidable in the bending direction with the tube clamped, A two-head two-radial system bending machine in which bending is performed in a left-right direction by bending from one side to the other side can be provided.

At this time, a first AC servomotor is installed on one side of each of the transfer frames, a speed reducer is connected to the first AC servomotor, a pinion gear is fixed to an end of an output shaft of the speed reducer, So that each of the transport frames can be reciprocated.

One or more left and right support posts are fixed to the bottom of each bender frame. At least one guide boss for guiding the up and down movement of the left and right support posts is provided on each of the transfer frames, and a second AC servomotor The second AC servo motor is connected to a first connection shaft as a first drive connection means, and an electromagnetic brake is installed in the middle of the first connection shaft. A first gear box connected to both ends of the first connection shaft And a ball screw jack connected to the second connecting shaft and vertically connected to the second connecting shaft to move the bender frame up and down.

The third AC servomotor is connected to the third AC servomotor by a second driving connection means and rotates. The bending shaft extends to an upper portion of the bender frame, and the bending die bed And a bottom bending die and a top bending die. The bottom bending die and the top bending die are connected to a first hydraulic cylinder installed below the bending shaft to perform opening and closing operations.

Embodiments of the present invention can provide a coil for a boiler which is not only excellent in manufacturing cost and productivity but also excellent in machining accuracy as compared with the prior art. It is extremely easy to maintain and repair equipment, and a pair of bending dies So that it is possible to bend the tube continuously, and it is possible to provide a number of advantages such that the bending operation can be performed compatibly even when the diameters of the large diameter tubes are different.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a plan view showing the overall configuration of a two-head two-radios system bending machine according to a preferred embodiment of the present invention.
2 is a planar view of a two-head two-radios system bending machine provided in the present invention;
3 is a front structural view of a two-head two-radios system bending machine provided in the present invention;
4 is a side elevational view of a two-head two-radios system bending machine provided in the present invention;
5 is a side elevational view of a two-head two-radios system bending machine provided in the present invention;
6 is an enlarged front view of a main part extracted from a bending die and side booster of a 2-head 2-radios system bending machine provided in the present invention.
Figure 7 is an example of an operating state when the tube is clamped and bent to a top bending die of a bending die of a two-head two-radius system bending machine provided in the present invention.
Figure 8 is an exemplary operating view of a bending die of a two-head two-radios system bending machine provided in the present invention when clamping and bending a tube to a bottom bending die.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The technical scope of the present invention is not limited to those described in the following description and the accompanying drawings, which are presented for the general understanding of the present invention. The detailed description of known configurations and functions that may unnecessarily obscure the gist of the present invention will be omitted.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a plan view showing the overall configuration of a two-head two-radios system bending machine according to a preferred embodiment of the present invention.

Referring to the drawings, the present invention is constituted by connecting a pair of benders 6 in parallel left and right. That is, in the present invention, the tube 1 processed in the previous step is transferred to the high-frequency heating device 3 by the carriage 2 and heated, and then the tube 1 1), i.e., the carriage 2 unloads the completed boiler coil.

The tube 1 loaded into the bender 6 of the present invention by the carriage 2 is subjected to a bending operation by the bender 6 as follows. The bender 6 is provided with the base frame 7, the transfer frames 8 and 9, the bender frames 14 and 15, the bending dies 4 and 5, Side booster 36 is included.

Fig. 2 is a plan view of a 2-head 2-radios system bending machine provided in the present invention, Fig. 3 is a front view of a 2-head 2-radius system bending machine provided in the present invention, Fig. 5 is a side structural view of a two-head two-radios system bending machine provided in the present invention. Fig.

Referring to the drawings, the present invention is provided with a pair of transfer frames 8 and 9 which are reciprocally movable right and left on an upper portion of a base frame 7 installed on the floor.

In other words, the first AC servomotors 10 are installed on one side of each of the conveyance frames 8 and 9, and the conveyance frames 8 and 9 are moved from side to side in the base frame 7 by the forward / The first AC servo motor 10 and the speed reducer 11 are connected to each other so that the pinion gear 12 is fixed to the output shaft end of the speed reducer 11 and the linear base (Linear way) and the rack gear 13, respectively.

A plurality of left and right support posts 16 and 17 are formed on the upper portions of the transfer frames 8 and 9 in such a manner that the bender frames 14 and 15, 14 and 15, and guided through the guide bosses 18 and 19 provided at the corresponding portions of the respective conveyance frames 8 and 9.

A second AC servomotor 20 is installed on one side of each of the conveyance frames 8 and 9 for raising and lowering the bender frames 14 and 15 and is provided with a chain sprocket and a chain, The first connecting shaft 22 is rotatably driven by using the first driving connecting means 21 and the electromagnetic brake 23 is provided in the middle of the first connecting shaft 22, The box 24 and the second connection shaft 25 in a direction perpendicular to the first connection shaft 22, respectively.

A second gear box 26 is connected to the second connecting shaft 25 and a ball screw jack 27 connected to the second connecting shaft 25 in a direction perpendicular to the second connecting shaft 25 and vertically movable up and down is provided, The upper end of the screw jack 27 is connected to the lower portion of each of the bender frames 14 and 15 so that the vertical movement of the second AC servomotor 20 allows the vertical movement of the bender frames 14 and 15 .

In order to rotationally drive the bending molds 4 and 5 to bend the tube 1 installed in the bender frames 14 and 15, a third AC servomotor 28 is installed in each of the transfer frames 8 and 9 And the bending shaft 30 can be rotationally driven by using the third AC servomotor 28 and the second drive connecting means 29.

The bending shaft 30 extends over the bender frames 14 and 15 and is fixed to the bending die bed 31 and the space 32. The upper bending shaft 30 has a bending radius different from that of the bottom bending die 33 and a saw bending die 34 may be installed.

Fig. 6 is an enlarged front view of a main part extracted from a bending die and a side booster of a two-head two-radios system bending machine provided in the present invention. Fig. Fig. 8 is an explanatory view of an operating state when clamping and bending a tube to a top bending die in a mold. Fig. 8 is a schematic view of a bending die of a two-head 2- Fig.

The bottom bending die 33 and the top bending die 34 are vertically and horizontally divided and tube fitting grooves 33a and 34a having a hemispherical cross section are formed in the middle so that the tube 1 can be interposed when the tube 1 is bent And a first hydraulic cylinder 35 is installed under the bending shaft 30 to open the bottom bending die 33 and the top bending die 34 of the split type so that the opening and closing operation can be performed .

A side booster 36 for clamping and bending the tube 1 together with the bending molds 4 and 5 is installed on the upper portions of the bender frames 14 and 15, respectively.

The side booster 36 is connected to the second hydraulic cylinder 37 and slides left and right so as to clamp or unclamp the tube 1. The pressure booster 39 is mounted on the cross block 38 vertically The pressure dies 39 and 40 are operated on the slide grooves 41 and 42 so as to be able to slide back and forth in a state where the tube 1 is clamped when bending, On the sliders 45, 46 on which the slide operation can be performed.

In the drawing, reference numeral 47 denotes a bending table, and reference numeral 48 denotes a cable bearing.

A process of bending a tube 1 having a desired radius using the 2-head 2-radios system bending machine of the present invention as described above will be described.

The tube 1 is cut, faced and beveled to a predetermined length through a processing automation line in the previous process, and is manufactured by butt welding using a welding apparatus, etc. The tube 1 is loaded from the carriage 4 to the high frequency heating apparatus 3 by using a stock pipe and a punch roller and a skid in a long tube (length 60 m) 2) is transferred to the bending mold (6) after heating.

The tube 1 subjected to the bending operation in the bending dies 4 and 5 rotates the carriage 2 so that the tube 1 loaded into the bender 6 by the carriage 2 such as electricity is moved The bending operation is sequentially performed through the same process.

The tube 1 is forwardly fed to the high frequency heating apparatus 3 in an elevated state via the bending table 47 via the carriage 2 to be heated and when the heating is completed, , And the high-frequency heating device 3 is lowered.

When the tube 1 is heated and placed on the bending table 47, one of the left and right bending dies 4 and 5 moves the tube 1 by moving the transfer frames 8 and 9 from above the base frame 7 It is moved to bend.

The first AC servo motor 10 mounted on one side of the transfer frames 8 and 9 is driven to drive the pinion gear 12 connected to the reducer 11 in the linear base and the rack gear When the bending dies 4 and 5 selected from the left and right bending dies 4 and 5 reach the bending position, the transfer frames 8 and 9 are moved in the right and left selected directions. The 1AC servomotor 10 is stopped and the bender frames 14 and 15 installed on the upper portions of the transfer frames 8 and 9 rise.

The second AC servomotor 20 starts to rotate so that the first connecting shaft 22 connected to the first driving connecting means 21 is rotationally driven and the first connecting shaft 22 connected to both ends of the first connecting shaft 22 And the ball screw jack 27 connected to the second connecting shaft 25 in a direction perpendicular to the second gear box 26 is driven by the first connecting shaft 25 and the second connecting shaft 25, So that the bender frames 14 and 15 are raised together with the left and right support posts 16 and 17 while being guided by the guide bosses 18 and 19 provided at the corresponding portions of the transfer frames 8 and 9, The bending dies 4 and 5 move up to the side of the tube 1 after the bending dies 4 and 5 are positioned to be connected to the tube 1, 34a having a selected radius of the die 33 or the saw bending die 34. The bending shaft 30 is inserted into the tube coupling groove 33a, The first hydraulic cylinder 35 provided at the lower portion of the tube is operated to raise the bottom bending die 33 or the top bending die 34 in the upper portion to open one of the tube engagement grooves 33a and 34a, 1 is engaged with the bending dies 4 and 5 and the second hydraulic cylinder 37 of the side booster 36 is operated to clamp the tube 1 at the next time to be installed on the cross block 38 The pressure dies 39 and 40 are slid toward the tube 1 coupled to the bending dies 4 and 5 so that the tube 1 is clamped between the bending dies 4 and 5 and the pressure dies 39 and 40 .

When the tube 1 is clamped to the bending dies 4 and 5 and the pressure dies 39 and 40 as described above, the third AC servomotor 28 is activated for bending, The bending shaft 30 is rotated by about 180 degrees so that the tube 1 is bent to a desired radius.

In order to prevent the tube 1 from being bent when the tube 1 is being bent, the tube 1 is made of an egg-shaped material. When the tube 1 is bent by the bending die 4 The sliders 45 and 46 provided with the pressure dies 39 and 40 when the bending dies 4 and 5 are rotated by the first and second hydraulic cylinders 43 and 43, 44 are moved back and forth along the slide grooves 41, 42, so that the pressure dies 39, 40 are moved outwardly of the tube 1 under bending by the bending dies 4, So that the bending can be smoothly performed.

After the tube 1 is first bent to the left side, for example, to the left side by using the pair of the benders 6, the bending dies 4, 5 and the pressure dies 39, When the pressure dies 39 and 40 are switched to the unclamping state by sliding the tube 1 clamped by the second hydraulic cylinder 37 by the operation of the second hydraulic cylinder 37, And the transfer frames 8 and 9 for the next bending are positioned at the lower portion of the tube 1. Thereafter, the first AC servomotor 20 is moved to the lower position, The bending molds 4,5 and the pressure dies 39 and 40 clamp the tube 1 and then the bending molds 4 and 5 are rotated so that the left and right directions are alternately The bending operation is automatically performed continuously.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. And changes may be made without departing from the spirit and scope of the invention.

1: tube 2: carriage
3: High-frequency heating device 4,5: Bending mold
6: Bender 7: Base frame
8,9: Transfer frame 10: 1st AC servo motor
11: Reduction gear 12: Pinion gear
13: Linear Way and Rack Gear 14, 15: Bender Frame
16,17: Support posts 18,19: Guide bosses
20: second AC servo motor 21: first drive connecting means
22: first connecting shaft 23: electromagnetic brake
24: first gear box 25: second connecting shaft
26: Second gear box 27: Ball screw jack
28: third AC servo motor 29: second drive connecting means
30: Bending shaft 31: Bending die bed
32: Space 33: bottom bending die
34: Top bending die 33a, 34a: Tube coupling groove
35: first hydraulic cylinder 36: side booster
37: second hydraulic cylinder 38: cross block
39, 40: pressure die 41, 42: slide groove
43, 44: third hydraulic cylinder 45, 46: slider

Claims (4)

A bending machine for bending a tube that has undergone a pretreatment process by loading the tube with a carriage,
A high frequency heater (3) for locally heating the tube (1) to be loaded;
A base frame (7) installed at one side of the high frequency heater (3);
A pair of transfer frames (8, 9) installed in parallel on the base frame (7) in a reciprocating manner;
Bender frames (14, 15) vertically installed on top of the respective transfer frames (8, 9);
A top bending die 34 disposed at an upper portion and a bottom bending die 33 disposed at an upper portion and being rotatably installed above each of the bender frames 14 and 15, Bending dies (4,5) having tube fitting grooves (33a, 34a); And
A pair of pressure dies 39 and 40 provided on one side of the bottom bending die 33 and the top bending die 34 and capable of sliding by the second hydraulic cylinder 37 to clamp the tube 1 And a side booster (36)
The pressure dies 39 and 40 of any one of the bending dies are formed on the slide grooves 41 and 42 formed on the side booster 36 up and down so as to be slidable in the bending direction in a state where the tube 1 is clamped. The bending operation is performed by the operation of the three hydraulic cylinders (43, 44) to bend to one side and bend to the other side from the other bending die. machine. The method according to claim 1,
A first AC servo motor 10 is installed on one side of each of the transfer frames 8 and 9,
A decelerator 11 is connected to the first AC servomotor 10,
A pinion gear 12 is fixed to the output shaft end of the speed reducer 11,
The pinion gear 12 is gear-connected to a linear way and a rack gear 13 provided in the base frame 7 in the longitudinal direction,
, And reciprocates the respective transfer frames (8, 9). The method according to claim 1,
One or more left and right support posts (16, 17) are fixed to the lower portions of the respective bender frames (14, 15)
At least one guide boss (18, 19) for guiding the lifting and lowering of the left and right support posts (16, 17) is provided on each of the transfer frames (8, 9)
A second AC servomotor (20) is installed on one side of each of the transfer frames (8, 9)
The second AC servo motor (20) is connected to the first connection shaft (22) by the first drive connection means (21)
An electromagnetic brake (23) is provided in the middle of the first connection shaft (22)
The second connection shaft 25 is connected to the first gear box 24 connected to both ends of the first connection shaft 22 in a direction perpendicular thereto,
A ball screw jack 27 connected vertically to the second gear box 26 and connected to the second connecting shaft 25 to vertically move the bender frames 14 and 15, ) Is provided. The method according to claim 1,
A third AC servomotor 28 is provided in each of the transport frames 8 and 9,
The bending shaft 30 is connected to the third AC servo motor 28 by the second drive connection means 29,
The bending shaft 30 extends over the bender frames 14 and 15 and is coupled to the bending die bed 31 and the space 32 and to the bottom bending die 33 and top bending die 34,
The upper bending die 33 and the upper bending die 34 are connected to a first hydraulic cylinder 35 provided under the bending shaft 30 to be opened and closed. 2-Head 2- Radius System Bending Machine.

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