KR20110065968A - Welding device - Google Patents

Abstract

PURPOSE: A welding device is provided to improve welding quality by maintaining the uniform distance of welding torch and welded object regardless of the cross section shape of a flange. CONSTITUTION: A welding device comprises a frame(200), a rotary shaft(300), a flange fixing unit(400), a welding unit(500) and an operating unit(600). The rotary shaft is pivotally installed in the frame. The flange fixing unit clinches the flange on the rotary shaft to be installed in the rotary shaft and can rotate the flange and pipe. The welding unit locates in the outer circumference of the pipe in order to weld the junction of the pipe and flange. The operating unit rotates the rotary shaft.

Description

Welding device {Welding device}

The present invention relates to a welding apparatus, and more particularly, to a welding apparatus for rotating a tubular body such as a pipe and automatically welding a flange to the tubular end.

In order to weld a flange to a pipe such as a straight pipe, a worker welds it manually or places the pipe on a turning roll, and then automatically welds the flange and the pipe body by using a welding device while rotating the turning roll.

The device for automatically welding the flange to the conventional pipe has a turning roll for supporting and rotating the pipe in the lower part in the workshop, and after installing the automatic welding device where the turning roll is installed, turning the straight pipe connected with the flange to the turning roll. Rotate the guide pipe to the joint of the straight pipe and the flange with the welding torch of the automatic welding device while rotating with the guide roller of.

However, since the conventional automatic welding apparatus has no means for restraining the position of the straight pipe, when the straight pipe is rotated, it moves in the longitudinal direction of the straight pipe. Accordingly, the joint part of the straight pipe and the flange also moves together, so that the gap between the welded part and the welding torch is not constant, so that the welding state is poor.

Korean Patent Publication No. 10-1996-0007162 discloses a 'flange welding device'.

The flange welding apparatus has a fixed jig having a front roller rotating in contact with the front surface of the flange, a rear roller connected to the support plate at a predetermined distance from the front roller, and a top roller mounted between the front roller and the rear roller. And a support for supporting the fixing jig up and down and a welding torch mounted on the front of the fixing jig.

However, the flange welding device does not have a means for restraining the position of the rotating tube, there is still a disadvantage that the tube moves in the longitudinal direction of the tube when rotating.

In addition, the welding torch welds the joint along the outer circumferential surface of the flange by a plurality of rollers rotatably supported on the outer circumferential surface of the flange, so that when the flange is formed into an elliptical cross section like an ellipse unlike the circular pipe, There is a disadvantage that the welding state is poor because the spacing of the welding torch for the portion is not kept constant.

The present invention was devised to improve the above problems, and prevents the tube from moving in the longitudinal direction during rotation, and is supported by a plurality of rollers on the outer circumferential surface of the tube, irrespective of the cross-sectional shape of the flange, the welding site and the welding torch It is an object of the present invention to provide a welding apparatus that can maintain a constant interval of.

Welding apparatus according to the present invention for achieving the above object is a welding device for welding a flange to a tube, a frame, a rotating shaft rotatably installed on the frame, and installed on the rotating shaft to rotate the flange and the tube A flange fixing part for fixing the flange to the rotating shaft so as to be able to be formed, a welding part which is located on an outer circumferential surface of the pipe body, and welds the welding portion of the flange and the pipe body, and a driving part which rotates the rotating shaft.

The flange fixing part is fixed to the rotating shaft, the first holding member is provided with a first seating groove so that the lower outer circumferential surface of the flange is inserted and seated on the upper portion of the first holding member, the upper side of the flange A second gripping member provided with a second seating groove so that an outer circumferential surface thereof can be inserted, and both ends thereof are respectively provided on the first and second gripping members, and elevating the second gripping member with respect to the first gripping member; It is preferable to have a cylinder.

The lifting cylinder is operated by hydraulic pressure or pneumatic, and the rotating shaft is provided with a transport space to which the hydraulic or pneumatic pressure for operating the lifting cylinder therein.

The flange fixing portion further includes a plurality of auxiliary fixing portions for pressing and fixing the outer circumferential surface of the flange,

The auxiliary fixing part has a pressure chuck slidably installed in the rotation center direction of the first and second gripping members in the first or second seating groove, and a chuck transfer means installed in the pressure chuck to move the pressure chuck. It is preferable to provide.

The welding part is a rotating roller which rotates in contact with the outer circumferential surface of the tube, a roller support for supporting the rotating roller, a welding torch support protruding in the direction of the joint portion of the flange and the tube on the roller support, and the welding torch support A welding torch installed at the welding part and the roller support is slidably moved upward and downward to move up and down along the outer circumferential surface of the tubular body on which the rotating roller rotates, and the frame is adjusted by a height adjusting means. It is provided with a support body which is installed to allow height adjustment.

The welding apparatus according to the present invention rotates the pipe by holding the flange to prevent the pipe from moving in the longitudinal direction during rotation, and can maintain a constant spacing between the welding site and the welding torch regardless of the cross-sectional shape of the flange to improve the welding quality Can be improved.

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

1 to 2 show a welding apparatus 100 according to the present invention.

Referring to the drawings, the welding apparatus 100 includes a frame 200, a rotation shaft 300 rotatably installed on the frame 200, and a flange fixing part installed on the rotation shaft 300 to restrain the flange 110 ( 400, a welding part 500 for welding the joint between the flange 110 and the tubular body 120, and a driving part 600 for driving the rotation shaft 300.

The frame 200 is formed in a rectangular plate shape having a predetermined strength, and although not shown in the drawing, a plurality of supports are formed on the bottom surface of the frame 200 to support the frame 200 at a predetermined height. .

The frame 200 includes a plurality of brackets 210 installed on an upper surface of the frame 200 to support the rotation shaft 300, and an auxiliary support part 220 to rotatably support the tubular body 120.

Bracket 210 is preferably a bearing is installed in the coupling portion with the rotating shaft 300 so as to support the rotating shaft 300 rotatably.

The auxiliary support 220 is inserted into the upper surface of the insertion block 221 and the plurality of insertion blocks 221 are installed on the upper surface of the frame 200 behind the flange fixing part 400 in the front and rear direction, the insertion block 221 and the tubular body An insertion member 222 rotatably supporting the 120 and an insertion pin 223 for fixing the insertion member 222 inserted into the insertion block 221 is provided.

The insertion block 221 has a rectangular cross section, and an insertion space 227 is provided therein so that the insertion member 222 can be inserted through the upper surface.

The first through hole 224 corresponding to the size of the insertion pin 223 is formed on the upper front surface of the insertion block 221 to insert the insertion pin 223 to fix the insertion member 222 therein. .

Insertion member 222 is formed of a rectangular cross-section having a size corresponding to the insertion space 227 so that the lower portion can be inserted into the insertion space 227 of the insertion block 221, the upper body rotates the tube 120 The support roller 226 is provided so that it may be supported.

On the front surface of the insertion member 222 opposite to the first through hole 224, the insertion pin 223 inserted into the first through hole 224 may be inserted into the insertion member 222 to penetrate into the second. The through hole 225 is formed.

At this time, the second through hole 225 can adjust the insertion depth of the insertion member 222 to the insertion block 221 to change the support height of the insertion member 222 in response to the outer diameter of the tubular body 120. It is preferable that a plurality is formed spaced apart from each other along the vertical direction.

On the other hand, Figure 3 shows another embodiment of the auxiliary support 230.

Elements having the same function as in the above-described drawings are denoted by the same reference numerals.

Referring to the drawings, the auxiliary support 230 is a plurality of insertion blocks 221 are installed on the upper surface of the frame 200 behind the flange fixing part 400, spaced apart from each other in the front and rear direction, and the upper surface of the insertion block 221 Is inserted into the insertion member 222 to rotatably support the tube body 120, and the elastic member 231 to elastically support the insertion member 222 in the insertion block 221.

The upper end of the elastic member 231 is fixed to the bottom surface of the insertion member 222, the bottom end is fixed to the bottom surface of the insertion space 227 of the insertion block 221. The elastic member 231 is preferably formed of a coil spring having a predetermined hardness so as to support the tube 120 so that the center of rotation of the tube body 120 and the rotating shaft 300 coincide with each other.

Meanwhile, in the illustrated example, the elastic member 231 has been described as a structure formed by a coil spring, but the elastic member 231 is not limited to the illustrated example but may be formed as a leaf spring.

On the other hand, Figure 4 shows another embodiment of the auxiliary support 240.

Referring to the drawings, the auxiliary support 240 is provided in the insertion space 227 of the insertion block 221 is provided with a lifting unit 250 for elevating the insertion member 222.

Lifting unit 250 is the upper end is rotatably connected to the lower surface of the insertion member 222, the lifting screw 251, the screw thread is formed along the outer circumferential surface, the lifting screw 251 is screwed to penetrate through the center, the insertion A rotation gear 252 rotatably supported on an inner wall of the block 221, a worm gear 253 fastened to an outer circumferential surface of the rotation gear 252, and both ends rotatably supported on an inner wall of the insertion block 221; The handle 254 is provided at one end of the rotating shaft of the worm gear 253 extending through the insertion block 221 so that the worker can rotate the worm gear 253.

At this time, the inner side of the insertion block 221 a plurality of positions spaced apart up and down at intervals corresponding to the thickness of the rotation gear 252 so that the rotation gear 252 can be restrained at a constant height with respect to the bottom surface of the insertion block 221. Constraints 255 are formed.

The position binding protrusion 255 is preferably formed on the inner wall surface of the insertion block 221 having a height corresponding to the height at which the worm gear 255 is installed so that the worm gear 255 can be fastened to the outer circumferential surface of the rotation gear 252. Do.

Referring to the operation of the lifting unit 250 configured as described above in detail as follows.

When changing the support height of the tubular body 120 of the insertion member 222, the operator grips the handle 254 and then rotates, thereby rotating the worm gear 253 connected to the handle 254.

The worm gear 253 is fastened to the outer circumferential surface of the rotation gear 252 to transmit the rotational force to the rotation gear 252. Since the rotation gear 252 is rotatably constrained to the inner wall of the insertion block 221 by the plurality of position binding protrusions 252, the lifting screw 251 screwed to the center by the rotational force transmitted to the worm gear 253. Raise and lower.

The insertion member 222 is lifted and lowered by the lifting screw 251 that is lifted and lowered by the rotation of the rotation gear 252 to change the support height of the tubular body.

The rotation shaft 300 according to the present invention will be described in detail as follows.

The rotating shaft 300 is formed of a pipe provided with a transport space 310 to which the pneumatic pressure supplied to the flange fixing part 400 is transferred.

One end of the rotary shaft 300 is provided with a rotary joint 330 to supply the air pressure to the transport space 310 in the rotating shaft 300, the other end of the rotary shaft is introduced into the transport space 310 on the outer peripheral surface A through hole 320 is formed in communication with the transfer space 310 to be discharged to the outside of the 300 to be supplied to the flange fixing part 400.

Pneumatic pressure supplied from a pneumatic supply means such as a pneumatic pump (not shown) is introduced into the transfer space 310 through the rotary joint 330, the pneumatic pressure is transferred along the transfer space 310 to the flange fixing part 400 Supplied to.

The flange fixing part 400 fixes the flange 110 so that the flange 110 and the tube body 120 can be rotated by the rotating shaft 300, and the first holding member 410 fixed to the other end of the rotating shaft 300. ), A second gripping member 420 seated on the upper surface of the first gripping member 410, an elevating cylinder 430 for elevating the second gripping member 420, and a through hole 320. A valve member 440 is formed on the outer circumferential surface of the position.

The first holding member 410 is formed in a plate shape of a semi-circular cross section, the front surface is fixed to the other end of the rotating shaft 300 so that the center of rotation of the rotating shaft 300 and the radial center of the first holding member 410 coincide.

At this time, the first holding member 410 is preferably fixed to the rotating shaft 300 so that the outer peripheral surface of the arc-shaped so that the second holding member 420 can be easily mounted on the upper surface.

A first seating groove 411 is formed at a rear surface of the first gripping member 410 to allow the lower outer peripheral surface of the flange 110 to be seated. The first seating groove 411 is preferably formed in an arc shape along the curved edge of the first holding member 410 so that the outer peripheral surface of the flange 110 formed in an arc shape can be easily inserted.

The second gripping member 420 is formed in a plate shape having a semicircular cross section, and is seated on an upper surface of the first gripping member 410 such that the outer circumferential surface of the arc shape is located upward.

A second seating groove 421 is formed at a rear surface of the second gripping member 420 so that the upper outer circumferential surface of the flange 110 can be inserted and restrained. The second seating groove 421 is preferably formed in an arc shape along the curved edge of the second holding member 420 so that the outer peripheral surface of the flange 110 formed in an arc shape can be easily inserted.

Both ends of the lifting cylinder 430 are fixed to the front surfaces of the first and second gripping members 410 and 420, respectively, and are installed at both sides of the first and second gripping members 410 and 420, respectively, about the rotation shaft 300. The lifting cylinder 430 is preferably formed in a pneumatic operation method that operates by the pneumatic pressure transferred through the transport space 310 of the rotating shaft 300.

Meanwhile, in the illustrated example, the structure in which the lifting cylinder 430 is formed in a manner of operating by pneumatic pressure has been described. However, the operation of the lifting cylinder 430 is not limited to the illustrated example, and may be operated by hydraulic pressure.

The valve member 440 is formed in a cylindrical shape having a hollow having an inner diameter corresponding to the outer diameter of the rotating shaft 300. On the inner wall surface of the valve member 440, a flow groove 442 is formed along the circumferential direction so that the pneumatic pressure discharged from the rotation shaft 300 flows, and on one outer circumferential surface there is a pneumatic flow through the flow groove 442 A supply valve 441 is installed to communicate with the flow groove 442 so as to be discharged to the outside to be supplied to the lifting cylinder 430.

The supply valve 441 is preferably formed of a solenoid valve so that an operator can easily operate the supply valve 441.

Referring to the operation of the flange fixing portion 400 configured as described above in detail as follows.

First, the lifting cylinder 430 is operated to raise and lower the second holding member 420 above the first holding member 410. A lower outer peripheral surface of the flange 110 welded to the end of the tube body 120 is inserted into the first seating groove 411 of the first gripping member 410 to be seated.

Next, the lifting cylinder 430 is operated to lower the second holding member 420 to the upper surface of the first holding member 410. At this time, it is preferable to lower the second holding member 420 so that the upper outer peripheral surface of the flange 110 is inserted into the second seating groove 421 of the second holding member 420.

The operator lowers the second gripping member 420 so that the first and second gripping members 410 and 420 can apply a fixing force to the flange 110 so that the flange 110 can rotate by the rotation shaft 300.

Since the flange 110 is fixed to the rotation shaft 300 by the flange fixing part 400 which is operated as mentioned above, the flange 110 and the tube body 120 are prevented from moving in the front and rear directions, thereby improving welding quality. Can be improved.

On the other hand, Figure 5 shows another embodiment of the flange fixing part 400 according to the present invention.

Referring to the drawings, the flange fixing part 400 further includes an auxiliary fixing part 700 for pressing and fixing an outer circumferential surface of the flange 110 held by the first and second holding members 410 and 420.

The auxiliary fixing part 700 includes a plurality of pressure chucks 710 slidably installed in the first seating groove 411 or the second seating groove 421, and chuck transfer means for moving the pressure chuck 710. .

The pressure chuck 710 is formed into a rectangular cross section of a height corresponding to the size of the first and second seating grooves 411 and 421 so as to be inserted into the first and second seating grooves 411 and 421 to slide. A plurality of seats are provided along the two seating grooves 411 and 421.

The pressure chuck 710 slides in the direction of the rotation center of the rotation shaft 300 to press the outer circumferential surface of the flange 110 inserted into the first and second seating grooves 411 and 421.

On the other hand, although not shown in the drawings, unlike the present embodiment, the end surface in contact with the flange 110 of the pressure chuck 710 is a non-slip member of the rubber material to prevent the sliding of the outer peripheral surface of the flange 110 It may be installed.

The chuck transfer means includes a hydraulic cylinder 720 which is operated by a hydraulic actuation method. The hydraulic cylinder 720 is installed in the pressure chuck 710 to move the pressure chuck 710. At this time, although not shown in the drawings, the hydraulic cylinder 720 is provided with a separate hydraulic supply means, unlike the lifting and lowering 430.

Meanwhile, in the illustrated example, the structure in which the chuck transfer means is configured as the hydraulic cylinder 720 has been described, but the chuck transfer means is not limited to the illustrated example, but the screw fastened through the first and second gripping members 410 and 420. It may be formed of a bolt.

Although not shown in the drawings, one end of the screw bolt is rotatably installed on the end surface of the pressure chuck 710, and the other end may be provided with a handle member so that the operator grips to rotate the screw bolt.

By the auxiliary fixing part 700 configured as described above, the flange fixing part 400 may improve the fixing force on the flange 110, and the flange 110 having an inner diameter smaller than the first and second holding members 410 and 420. Degree can be fixed to the rotating shaft 300.

The welding part 500 according to the present invention will be described in detail as follows.

The welding part 500 includes a rotating roller 510 rotating in contact with the outer circumferential surface of the tubular body 120, a roller support 520 supporting the rotating roller 510, and a welding torch support 530 protruding from the roller support 520. ), A welding torch 540 installed on the welding torch support 530, and a support body 550 installed on the frame 200 and supporting the roller support 520.

The rotary roller 510 includes a plurality of rotating bodies 511 installed to contact the outer circumferential surface of the tubular body 120, and a restraining body 512 rotatably restricting the rotating body 511.

The roller support 520 is fixed to the upper surface of the restraint body 512, and is fixed to the upper end of the first roller support member 521 and the first roller support member 521 formed in a rectangular cross-section, the upper portion of the support body ( The second roller support member 522 is slidably supported in the vertical direction 550.

The second roller support member 522 has a circular cross section and extends upward. An upper end of the second roller support member 522 is formed with a stopper 523 having an outer diameter larger than that of the second roller support member 522 so as to prevent the second roller support member 522 from being separated from the support body 550.

The welding torch support 530 protrudes from the side of the first roller support member 521 toward the joint portion of the flange 110 and the pipe body 120. At the end of the welding torch support 530 is provided a torch holding member 531 that can hold the welding torch 540.

The welding torch 540 fixed to the torch holding member 531 maintains the joint portion of the pipe 120 and the flange 110 and welds the joint portion at a constant interval.

The support body 550 is the main body 551 is installed in the frame 200 by the height adjustment means 554 so that the height can be adjusted, the support arm 552 installed on one side of the main body 551, the support arm And a support block 553 provided at the end of 552.

The main body 551 is formed in a square plate flat, it is installed on the upper surface of the frame 200 by the height adjusting means 554 to adjust the height with respect to the frame 200.

The height adjusting means 554 is formed of a hydraulic cylinder operated by hydraulic pressure, both ends are fixed to the lower surface of the main body 551 and the upper surface of the frame 200, respectively, to raise and lower the main body 551. By the height adjusting means 554, the main body 551 can adjust the support height of the welding torch 540 according to the outer diameter of the tube body 120.

Support arm 552 is installed on one side of the main body 551, the end is formed to be bent in the direction in which the tube body 120 is located.

The support block 553 is installed at the end of the support arm 552, and the insertion hole corresponding to the outer diameter of the second roller support member 522 on the upper and lower surfaces to insert and support the second roller support member 522. 555 is formed to penetrate through each.

At this time, the insertion hole 555 is the mutual support of the upper and lower surfaces of the support block 553 so that the support block 553 can support the second roller support member 522 in a state perpendicular to the center of rotation of the tubular body 120. It is preferred that they are respectively formed at opposite positions.

The second roller support member 522 is supported at a plurality of positions spaced apart from each other in the vertical direction by the insertion holes 555 formed on the upper and lower surfaces of the support block 553, so that the rotation of the tubular body 120 does not incline in one direction. It can remain perpendicular to the centerline.

Referring to the driving unit 600 according to the present invention in detail as follows.

The drive unit 600 includes a drive motor 610 for generating a rotational force, a drive gear 620 fastened to the rotary shaft 300 of the drive motor 610, a driven gear 630 fastened to the rotary shaft 300, A timing belt 640 is connected to the driving and driven gears 620 and 630 to transmit rotational force.

The welding part 500 configured as described above is supported by the welding torch 540 interlocked with the rotary roller 510 installed to contact the outer circumferential surface of the pipe body 120, so that the cross-sectional shape of the pipe body 120 and the flange 110 is increased. Although different, the welding torch 540 may maintain a predetermined interval at the junction of the tubular body 120 and the flange 110.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments thereof are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1 is a perspective view of a welding apparatus according to the present invention,

2 is a partial side cross-sectional view of the welding apparatus of FIG.

Figure 3 is a side cross-sectional view of the auxiliary support according to another embodiment of the present invention,

4 is a partial cross-sectional perspective view of a flange fixing part according to another embodiment of the present invention.

Claims (5)

In the welding device for welding the flange to the tube, A frame; A rotating shaft rotatably installed on the frame; A flange fixing part installed on the rotating shaft to fix the flange to the rotating shaft to rotate the flange and the tube; A welding part located on an outer circumferential surface of the tube and welding a joint portion of the flange and the tube; And a driving unit for rotating the rotating shaft. The method of claim 1, The flange fixing part A first gripping member fixed to the rotating shaft and provided with a first seating groove so that a lower outer circumferential surface of the flange can be inserted and seated therein; A second gripping member seated on an upper portion of the first gripping member and provided with a second seating groove for inserting an upper outer peripheral surface of the flange; And lifting cylinders provided at both ends of the first and second holding members, respectively, for elevating and lowering the second holding member with respect to the first holding member. 3. The method of claim 2, The lifting cylinder is operated by hydraulic or pneumatic, The rotating shaft is a welding device, characterized in that the transfer space is provided with a hydraulic or pneumatic pressure to operate the lifting cylinder therein. 3. The method of claim 2, The flange fixing portion further includes a plurality of auxiliary fixing portions for pressing and fixing the outer circumferential surface of the flange, The sub-government A pressure chuck slidably installed in the rotation center of the first and second gripping members in the first or second seating groove; And a chuck transfer means installed on the pressure chuck to move the pressure chuck. The method according to claim 3 or 4, The welding part A rotating roller rotating in contact with the outer circumferential surface of the tube; A roller support for supporting the rotating roller; A welding torch support projecting to the roller support in a direction in which the flange and the tube are joined; A welding torch installed on the welding torch support to weld the joint part; And a support body installed to be able to slide up and down along the outer circumferential surface of the tubular body in which the rotating roller rotates, and to adjust the height on the frame by a height adjusting means. Welding apparatus characterized in that.

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