KR20150144513A - Automatic welding apparatus for pipe and flange - Google Patents

Abstract

The present invention relates to butt welding for pipes and an automatic welding device for flange welding which is expected to reduce costs and improve a welding quality. The present invention comprises: a base unit mounted on a floor surface; a rotation unit installed to be rotated backward and forward in an upper portion of the base unit; a support unit composed of a lower frame and an upper frame; a position adjustment unit composed of a first position adjustment bar, a second position adjustment bar, and a third position adjustment bar; a driving unit composed of a first slide and a second slide; a welding unit composed of a welding torch and a plurality of links; and a control unit controlling operation of the rotation unit, support unit, position adjustment unit, driving unit, and welding unit.

Description

Technical Field [0001] The present invention relates to an automatic welding apparatus for pipe butt welding and flange welding,

The present invention relates to an automatic welding apparatus for pipe butt welding and flange welding that is used to automatically butt weld two pipes or to weld a flange to an end of a pipe.

In general, when two pipes are connected together or the flange is fixed to the end of the pipe, the welding method is adopted so that the airtightness is surely ensured by being firmly connected and fixed.

Such pipe butt welding or flange welding is most often performed manually by a worker. However, in the case of manual welding, the post-machining operation is required because the welding quality is not constant although it depends on the skill of the operator.

Many automatic welding apparatuses have been developed and used for ensuring uniform welding quality so as to minimize or eliminate the above-mentioned post-machining operations as the cost and time increase as the number of the post-machining operations increases.

However, the automatic welding devices that have been developed and used so far have been classified as having a structure for automatically performing pipe butt welding and having a structure for automatically performing flange welding.

That is, since an automatic welding apparatus having a structure capable of concurrently performing pipe butt welding and flange welding has not been developed, the welding apparatus for connecting the pipe and the welding apparatus for connecting the flange must be used in parallel for the above- There is a problem that it takes.

In the case of an automatic welding apparatus that automatically performs flange welding, the flange inner diameter can not be welded or the flange inner diameter can not be welded in the following manner. Thus, there is a problem that the welding quality is not uniform.

Korean Registered Patent No. 10-1254051, Apr. 12, 2013. Korean Patent Laid-Open Publication No. 10-2001-0037076, May 23, 2001.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems, and it is an object of the present invention to provide a welding apparatus and a welding method for welding a pipe and a flange, And it is an object of the present invention to provide an automatic welding apparatus for pipe butt welding and flange welding having a structure capable of improving the quality of welding by performing the welding in the following manner at the time of flange welding.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

According to an aspect of the present invention, there is provided an automatic welding apparatus for pipe butt welding and flange welding, comprising: a base portion seated on a bottom surface; A turning part installed on the upper part of the base part so as to be rotatable forward and backward; A lower frame fixed to the lower part of the rotary part and having a plurality of lower rollers rotatably mounted on the lower part, the gap being adjustable between the upper and lower frames; And a lower frame provided with a lower roller; A second position adjusting bar provided on an upper portion of the upper frame and linearly moving forward and backward, a second position adjusting bar provided at an end of the first position adjusting bar and linearly moving left and right, And a third position adjustment bar that linearly moves upward and downward; A driving part provided at an end of the third position adjusting bar and constituted by a first slide which linearly moves left and right and a second slide which linearly moves upward and downward; A welding portion formed by a welding torch provided on one side of the driving portion and a plurality of links connected in a multistage manner between an end portion of the driving portion and the welding torch so as to be manually adjusted to be welded in the below- And a controller for controlling operations of the rotary part, the support part, the position adjusting part, the driving part, and the weld part, wherein the end part of the first pipe, which is rotatably supported by the rotary part and the support part, The welded portion adjusted to the weldable position by the adjusting portion is automatically welded to the flange by automatic butt welding with the second pipe in the following manner while the arc height and the weaving width are controlled by the driving portion.

The link includes: a first link having one end pivotally connected to an end of the second slide; A second link whose one end is pivotally connected to the other end of the first link; And a third link, one end of which is pivotally connected to the other end of the second link, and the welding torch is coupled to the other end of the third link.

Wherein the control unit controls the position of the first pipe and the welding torch by activating the turning unit, the supporting unit, and the position adjusting unit before welding, And a welding control unit for controlling the movement of the welding torch by operating the supporting unit, the driving unit, and the welding unit at the time of welding.

The supporting portion is further provided with a jig for rotatably supporting the first pipe so that the first pipe is tilted forward or backward when the first pipe is welded to the flange.

The jig is connected to the support unit by a joint of a multi-joint type so that the jig can be adjusted in position corresponding to the tilted angle of the first pipe.

According to the present invention, since the pipe butt welding and the flange welding are both possible, the cost can be reduced and the installation space can be reduced. It is also expected that the welding quality can be improved by adjusting the position of the welding torch freely through the control of the four axes (forward / backward movement, forward / backward movement, left / right movement, up / down movement)

1 is a perspective view showing a pipe butt welding state of an automatic welding apparatus for pipe butt welding and flange welding according to a preferred embodiment of the present invention.
2 is a side view showing a pipe butt welding state of an automatic welding apparatus for pipe butt welding and flange welding according to a preferred embodiment of the present invention.
3 is a cross-sectional view showing a pipe butt welding state of an automatic welding apparatus for pipe butt welding and flange welding according to a preferred embodiment of the present invention.
FIG. 4 is a side view showing a flange outer diameter welding state of an automatic welding apparatus for pipe butt welding and flange welding according to a preferred embodiment of the present invention; FIG.
5 is a side view showing a flange inner diameter welding state of an automatic welding apparatus for pipe butt welding and flange welding according to a preferred embodiment of the present invention.

The automatic welding apparatus for pipe butt welding and flange welding according to the present invention is an apparatus for improving welding quality by eliminating unevenness of welding state due to manual welding by performing welding in an automatic manner.

Particularly, the automatic welding apparatus for pipe butt welding and flange welding according to the present invention is capable of both butt welding of two pipes and welding of flanges to one pipe end, as well as four-axis (front- The welding can be performed in the normal downward viewing mode regardless of the above-mentioned operation through the control of the movement, the left-right movement, and the up-and-down movement.

The support part is provided on the upper part of the support part so as to be able to move up and down and up and down. A driving part, a welding part which is freely adjustable in angle on one side of the driving part, and a control part for controlling the constituent parts.

That is, the end portion of the rotating pipe, which is supported at a certain angle by the rotating portion and the supporting portion, is automatically moved to another pipe or flange while moving in a predetermined orbit by the driving portion, This is due to the structure of welding.

Thus, both pipe butt welds and flange welds are available, as well as being able to be welded at any time in the below-view welds, thereby saving costs and improving weld quality.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a pipe butt welding state of an automatic welding apparatus for pipe butt welding and flange welding according to a preferred embodiment of the present invention, and FIG. 2 is a perspective view of a pipe butt welding and flange welding according to a preferred embodiment of the present invention. FIG. 3 is a cross-sectional view showing a pipe butt welding state of an automatic welding apparatus for pipe butt welding and flange welding according to a preferred embodiment of the present invention, and FIG. 3 is a cross- 4 is a side view showing a flange outer diameter welding state of an automatic welding apparatus for pipe butt welding and flange welding according to a preferred embodiment of the present invention and FIG. 5 is a side view showing a pipe butt welding and flange welding according to a preferred embodiment of the present invention A side view showing a flange inner diameter welding state of an automatic welding apparatus for welding .

The automatic welding apparatus 100 for pipe butt welding and flange welding according to a preferred embodiment of the present invention includes a base 110, a pivot 120, a support 130, An adjusting unit 140, a driving unit 150, a welding unit 160, and a control unit (not shown).

The base 110 is mounted on the bottom surface to stably support the rotary part 120, the supporting part 130, the position adjusting part 140, the driving part 150 and the welding part 160.

Next, the rotary part 120 is configured to adjust the forward and backward rotation angles of the second pipe P 'or the flange F and the first pipe P to be welded.

To this end, the rotary unit 120 is installed on the upper portion of the base unit 110 so as to be rotatable in the front-rear direction. That is, the lower end is rotatably installed on the rotation shaft 111 horizontally installed on the upper portion of the base 110.

The rotation shaft 111 is configured to be rotationally driven in both directions so that the forward and backward rotation angles can be adjusted by the motor 112 and the power transmission means 113 provided inside the base portion 110.

The rotation unit 120 rotates the rotation shaft 111 in the forward and backward directions about the base unit 110 as the rotation shaft 111 rotates in one direction or the other direction in accordance with the driving of the motor 112 and the operation of the power transmission unit 113 The rotation angle of the first pipe P, which is rotatably supported by the support portion 130, is adjusted.

Next, the support portion 130 is configured to press and support the first pipe (P) whose rotational angle is controlled by the rotation portion (120) while rotating.

For this purpose, the support part 130 includes a lower frame 131 fixed to the lower part of the rotary part 120, and a lower frame 131 fixed to the upper part of the rotary part 120 so as to be vertically movable And an upper frame 133 to be installed.

A plurality of lower rollers 132 for supporting the first pipe P from below can be disposed on the upper side of the lower frame 131 so that the interval between the lower rollers 132 can be adjusted. P from the upper side.

At this time, the upper frame 133 includes a lifting nut 133a, which is lifted and lowered at one end of the rotary part 120 by engaging with a motor 136 and a lifting screw 135 vertically installed to be rotated by the power transmission unit 137, The lifting screw 135 is rotated in accordance with the driving of the motor 136 and the action of the power transmitting means 137, so that the lifting screw 135 can be moved up and down.

The lower roller 132 is provided with a fixing table 132a which is rotatably supported at both ends so as to be movable in the left and right horizontal directions along the guide rails 132b.

Each of the lower rollers 132 moves along the guide rail 132b by a motor (not shown) provided inside the lower portion of the rotary portion 120 and a power transmission means (not shown) . The lower roller 132 is configured to rotate by a motor 138 and a power transmitting means 139 provided inside the rotary part 120. [

The support part 130 rotates the first pipe P in one direction while pressing the first pipe P upward and downward through the upper roller 134 and the lower roller 132 so that the first pipe P has a movement capable of automatic welding .

On the other hand, when the first pipe P is welded to the support portion 130 with the flange F, the first pipe P is prevented from slipping from the upper roller 134 and the lower roller 132 by an inclined angle (Not shown) that rotatably supports the first pipe (P) or the flange (F) through a roller or the like.

However, the jig is connected to the supporting part 130 so that the jig can be moved to a free angle and position by a multi-joint type connecting rod (not shown) so that the position of the jig can be adjusted corresponding to the inclined angle of the first pipe P.

Next, the position adjustment unit 140 adjusts the position of the welded portion 160 in correspondence with the position of the first pipe P whose forward and backward angles are adjusted by the rotary unit 120. FIG.

The position adjusting unit 140 includes a first position adjusting bar 141 installed at an upper portion of the upper frame 133 and linearly moving forward and backward and a second position adjusting bar 141 disposed at an end of the first position adjusting bar 141, And a third position adjusting bar 145 installed at an end of the second position adjusting bar 143 and moving up and down in a straight line.

At this time, the first position adjustment bar 141 is configured to linearly move in the forward and backward direction by the motor 142 provided at the end portion thereof and the power transmission means (not shown). The second position adjustment unit 143 is configured to linearly move left and right by a motor 144 provided at an end portion thereof and a power transmission means (not shown). The third position adjustment unit 145 is configured to linearly move up and down by a motor 146 provided at an end portion thereof and a power transmission means (not shown).

The position adjusting unit 140 adjusts the position of the welded part 160 to the first pipe P by the operation of the first position adjusting bar 141, the second position adjusting bar 143 and the third position adjusting part 145, As shown in FIG.

Next, the driving unit 150 is installed between the position adjusting unit 140 and the welding unit 160 to apply the motion of the welding unit 160. That is, the driving unit 150 determines the arc length and the weaving width of the welded portion 160 by imparting motion to the welded portion 160.

To this end, the driving unit 150 includes a first slide 151 installed at the end of the third position adjusting bar 145 of the position adjusting unit 140 and linearly moving left and right, and a second slide 152 moving linearly up and down do.

That is, the first slide 151 linearly moves the welded portion 160 left and right to determine the weaving width, and the second slide 152 linearly moves the welded portion 160 up and down to determine the arc length do.

The welding part 160 is installed on one side of the driving part 150 and moves automatically according to the operation of the driving part 150 in a state where the position is adjusted by the position adjusting part 140 so that the turning part 120 and the supporting part The end portion of the rotating first pipe P is automatically welded to the second pipe P 'or the flange F in a state in which the front and rear angles are adjusted by the first and second pipes 130 and 130.

The welding portion 160 may include a welding torch 161 disposed at one side of the driving portion 150 and a plurality of links 174 disposed at a plurality of stages between the driving portion 150 and the welding torch 161, 162).

The link 162 includes a first link 162a having one end pivotably connected to an end of the second slide 152 and a second link 162a having one end pivotably connected to the other end of the first link 162a And a third link 162c having one end pivotally connected to the other end of the second link 162b and the other end of which the welding torch 161 is coupled through.

Accordingly, the welding torch 161 of the welded portion 160 is welded to the first link 162a in accordance with the user's operation, not only during pipe butt welding but also during flange inner diameter and outer diameter welding, as shown in Figs. 2, 4, The second link 162b and the third link 163c in the following manner.

The control unit may be installed at one side of the base unit 110 or may be installed near the base unit 110 and may include a rotation unit 120, a support unit 130, a position adjustment unit 140, a driving unit 150, 160 are controlled so that welding is performed in an automated manner.

The control unit includes a position control unit for controlling the position of the first pipe P and the welding torch 161 before welding, the position control unit involved in the operation of the turning unit 120, the support unit 130 and the position adjusting unit 140, A driving unit 150 and a welding control unit 160 for controlling the rotation of the first pipe P and the movement of the welding torch 161 during operation of the welding unit 160. [

The control unit controls the angle of the first pipe P and the position of the welding torch 161 through the rotation unit 120, the support unit 130 and the position adjustment unit 140 before welding according to the welding object, The arc length and the weaving width of the welding torch 161 are controlled through the rotary unit 120, the support unit 130, and the position adjustment unit 140. FIG.

As described above, according to the present invention, not only pipe butt welding but also flange welding is possible, and cost reduction and welding quality improvement can be expected as welding is always performed through the four-axis control.

The above-described embodiments are merely illustrative, and various modifications may be made by those skilled in the art without departing from the scope of the present invention.

Therefore, the true technical protection scope of the present invention should include not only the above embodiments but also various other modified embodiments according to the technical idea of the invention described in the following claims.

110: Base portion
111:
112: motor
113: Power transmission means
120:
121: Motor
122: Power transmission means
130: Support
131: Lower frame
132: Lower roller
132a:
132b: guide rail
133: upper frame
133a: lifting nut
134: upper roller
135: lifting screw
136: Motor
137: Power transmission means
138: Motor
139: Power transmission means
140:
141: first position adjusting bar
142: second position adjusting bar
143: third position adjusting bar
142, 144, 146: motor
150:
151: 1st slide
152: 2nd slide
160:
161: welding torch
162: Link
162a: first link
162b: second link
162c: third link
P: first pipe
P ': second pipe
F: Flange

Claims (5)

A base portion 110 that is seated on the bottom surface;
A rotary part 120 installed on the upper part of the base part 110 so as to be rotatable forward and backward;
A lower frame 131 fixed to a lower portion of the rotary unit 120 and having a plurality of lower rollers 132 rotatably mounted on the lower frame and having an adjustable spacing therebetween, A support 130 configured to be movable up and down so as to be spaced from the lower frame 131 and having an upper frame 133 on which a lower roller 134 is installed;
A first position adjusting bar 141 installed on the upper part of the upper frame 133 and linearly moving forward and backward and a second position adjusting bar 141 installed on an end of the first position adjusting bar 141 and linearly moving left and right, 143), and a third position adjusting bar (145) installed at an end of the second position adjusting bar (143) and linearly moving upward and downward;
A driving unit 150 installed at an end of the third position adjusting bar 145 and composed of a first slide 151 that linearly moves left and right and a second slide 152 that linearly moves upward and downward;
A welding torch 161 provided at one side of the driving unit 150 and a multi-stage connection between the end of the driving unit 150 and the welding torch 161 are manually adjusted to be welded in the below- A welded portion 160 composed of a plurality of links 162; And
And a control unit (not shown) for controlling the operation of the rotary unit 120, the support unit 130, the position adjustment unit 140, the driving unit 150, and the weld unit 160,
The end portion of the first pipe P which is rotatably supported at the predetermined forward and backward angles by the rotary portion 120 and the support portion 130 is inserted into the welded portion 160 adjusted to the welding position by the position adjustment portion 140, Is automatically welded to the second pipe (P ') by a butt weld or automatically welded to the flange (F) while the arc height and the weaving width are controlled by the drive part (150) Automatic welding equipment for welding and flange welding. The method according to claim 1,
The link (162)
A first link 162a having one end pivotally connected to an end of the second slide 152;
A second link 162b having one end pivotally connected to the other end of the first link 162a; And
And a third link (162c) in which one end is pivotally connected to the other end of the second link (162b) and the welding torch (161) is coupled to the other end through a pipe (162c) Automatic welding equipment for welding. The method according to claim 1,
Wherein,
A position control unit for controlling the position of the pipe (P) and the welding torch (161) by operating the rotary part (120), the support part (130) and the position adjustment part (140) before welding; And
And a welding control part for controlling the movement of the welding torch (161) by operating the supporting part (130), the driving part (150) and the welding part (160) at the time of welding. Automatic welding device for flange welding. The method according to claim 1,
In the support portion 130,
When the first pipe P is welded to the flange F, the first pipe P or the flange F is rotated so that the first pipe P is tilted forward or backward (Not shown) for supporting the pipe butt welding and flange welding. 5. The method of claim 4,
The jig,
Wherein the first pipe (P) is installed on the support part (130) by a connecting joint (not shown) of a multi-joint type so as to be adjustable in position corresponding to the inclined angle of the first pipe (P) Welding apparatus.

Images