KR102151259B1 - Automatic welding system - Google Patents

Abstract

The present invention relates to an automatic welding system implemented to automatically weld while placing a pipe-shaped object to be welded, which comprises: a mounting unit mounting the object to be welded in a temporary welding status; an elevating unit raising the object to be welded so that the object to be welded can be mounted on the mounting unit when the object is mounted on an upper side thereof; and a welding unit installed on an upper side of the mounting unit, and performing welding while moving along a temporary welding portion of the object to be welded exposed through the mounting unit.

Description

Automatic welding system {AUTOMATIC WELDING SYSTEM}

The present invention relates to an automatic welding system, and more particularly, to an automatic welding system implemented to automatically weld while placing a pipe-shaped object to be welded.

In general, welding refers to a method of applying heat or pressure to metal materials of the same type or different types to form a direct bonding between solids, or a bonding process using the same method.

Conventional welding methods are generally performed by double-sided welding, which may be due to the thickness of the plate to be welded or because it corresponds to a case where perfect sealing is required, such as an LPG gas cylinder. However, if both sides are individually welded in this way, the time and labor required for the welding process are doubled. Also, depending on the shape of the object to be welded, it is often difficult or impossible to weld inside. Nevertheless, it is already explained that double-sided welding is inevitable.

On the other hand, in general, welding is often performed manually, but when a welding process is involved in mass production of standardized products, time and cost are saved by using an automatic welding device corresponding to the standard of the product.

However, in order to obtain the effect of double-sided welding as described above in such an automated device, each welding torch must be configured on both sides or a moving path must be formed so that the welding torch moves both sides, so the configuration of the device is complicated and enlarged. There is a problem that the manufacturing process of the device takes a lot of time and cost, and the unit cost of the device is also excessively high. In addition, even if welding is performed using such an apparatus, it was difficult to solve the problem that the welding process was complicated and the work time was long.

On the other hand, the above-described background technology is technical information that the inventor possessed for derivation of the present invention or acquired during the derivation process of the present invention, and is not necessarily a known technology disclosed to the general public prior to filing the present invention. .

Korean Patent Registration No. 10-0732311 Korean Patent Registration No. 10-1037773

One aspect of the present invention provides an automatic welding system implemented so that welding can be performed automatically while mounting an object to be welded in a state of being tack-welded in a pipe shape.

The technical problem of the present invention is not limited to the technical problem mentioned above, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

An automatic welding system according to an embodiment of the present invention includes: a mounting portion for mounting an object to be welded in a temporary welding state; An elevating unit for raising and lowering the welded object so that the object to be welded can be mounted on the mounting portion when the object is mounted on the upper side; And a welding part installed on the upper side of the mounting part and performing welding while moving along a temporary welding part of the to-be-welded object exposed through the mounting part.

In one embodiment, the mounting portion, a mounting frame consisting of a horizontal frame extending in a horizontal direction, and a vertical frame bent in a downward right angle direction from the rear end of the horizontal frame to be extended; A mounting bar spaced downward from the horizontal frame, facing the horizontal frame from a front end of the vertical frame, extending in a horizontal direction, and mounting the inner upper side of the welded material so that the welded material can be mounted; One end is rotatably connected to the front end of the horizontal frame, and the other end is rotated downward so that the object to be welded mounted on the mounting bar is not separated from the mounting bar during the welding process, so that the object is mounted. A clamp for fastening the front end of the mounting bar; A base frame extending from a lower side of the vertical frame in a shear horizontal direction to support the mounting frame; And a rear end of the lifting part is installed along the front surface of the vertical frame, and the lifting part is raised or lowered so that the lifting part supports the lower side of the welded object corresponding to the height of the welded object mounted on the mounting bar. It may include; an elevating slider for lowering.

In an embodiment, the horizontal frame includes: a first pressure plate for pressing an upper side of the welded object mounted on the mounting bar so that the welded object does not move during a welding process; A second pressure plate that is installed to be spaced apart from the first pressure plate to the other side and presses the other side of the upper portion of the object to be welded on the mounting bar so that the object to be welded does not move during the welding process; A first insulating part installed along the other side of the first pressing plate facing the second pressing plate; And a second pressure plate installed along one side of the second pressure plate facing the first pressure plate, and spaced apart from the first insulating portion so as to form a space for exposing the welding portion of the welded object upward. 2 insulation part; may include.

In one embodiment, the elevating part is bent in a "V" shape so as to support one side of the lower part and the other side of the object to be welded, and is formed to extend in the front and rear longitudinal direction, and the rear end is installed in the elevating slider. Mold support; A first support spaced apart from one side of the "V" type support and extending in the front and rear longitudinal direction so as to support a lower side of the welded object; A second support spaced apart from the other side of the "V" type support and extending in the front and rear longitudinal direction to support the other lower side of the welded object; A plurality of first ball heads are installed spaced apart from each other at equal intervals along an inner surface of one side of the "V" type support that faces the lower side of the welded object; A second ball head in which a plurality of pieces are spaced apart from each other at equal intervals along the inner side of the other side of the "V"-shaped support that faces the other lower side of the welded object; A plurality of pieces are spaced apart from each other at equal intervals along the inner side of the first pedestal facing the lower one side of the welded object so as to reduce the frictional force of the welded object moving from the front end to the rear end of the "V" type support A first forward roller installed; And a plurality of each other at equal intervals along the inner side of the second pedestal facing the other lower side of the welded object so as to reduce the frictional force of the welded object moving from the front end to the rear end of the "V" type support. It may include; a second forward roller that is installed to be spaced apart.

In one embodiment, the welding system according to another embodiment of the present invention may further include a rotating unit that rotates the object to be welded mounted on the mounting bar while being mounted on the mounting bar.

In one embodiment, the rotating part is formed in the shape of a circular ring corresponding to the diameter of the object to be welded, is installed at the front end of the object to be welded, rotating clockwise or counterclockwise while rotating the object to be welded together; A plurality of fastening jigs installed along the rear end of the rotary ring to fasten the welded object so that the welded object cannot move during rotation; A rotating gear engaged with and connected to the lower side of the rotating ring and rotating the rotating ring while rotating in a clockwise or counterclockwise direction; And a drive motor installed at a front end of the rotation gear to rotate the rotation gear.

In one embodiment, the rotary ring is formed extending in the longitudinal direction, the ring body is formed in a ring shape by fastening one end and the other end to each other after being rolled round; Through holes repeatedly formed at regular intervals along the ring body; A fastening groove formed between a front end of the through hole and a front end of the ring body, and between a rear end of the through hole and a rear end of the ring body; A fastening bolt in which one end and the other end of the ring body are inserted through a fastening groove positioned at an upper side and exposed to a lower side through a fastening groove positioned at a lower side of the ring body; And a fastening nut fastened to a lower portion of the fastening bolt.

In one embodiment, the rotation gear is formed in a cylindrical shape, installed in close contact with the lower side of the rotation ring, the gear cylinder rotating according to the rotation of the drive motor; And a plurality of fastening gears that are installed at regular intervals along the periphery of the gear cylinder, and are sequentially inserted into the through holes as the gear cylinder is rotated to rotate the rotary ring.

In one embodiment, the gear cylinder may have a plurality of gear installation grooves along the circumference so that the fastening gear is inserted and installed at equal intervals corresponding to the number of the fastening gears.

In an embodiment, the fastening gear includes: a gear blade inserted into the gear installation groove, and one end exposed to the outside of the gear installation groove to be inserted into the through hole is formed in a round loud shape; A protrusion protruding along the outer circumferential surface of the other end of the gear blade so that the gear blade is not separated from the gear installation groove by being caught by a separation preventing jaw protruding in an inward direction along the inlet of the gear installation groove; And an elastic body installed inside the gear installation groove to support the other end of the gear blade using an elastic force.

In one embodiment, the fastening gear is mounted on a zigzag groove extending in a zigzag shape along an inner peripheral surface of the gear installation groove along the inner peripheral surface of the gear blade, and the gear blade is the gear blade It may further include a sliding protrusion for moving the gear blade in response to the shape of the zigzag groove while changing and moving in a sliding direction in the left and right direction along the zigzag groove as it is inserted into the inside of the installation groove.

According to one aspect of the present invention described above, by automatically performing welding while mounting the object to be welded in a state of being tack-welded in a pipe shape, the time required for the welding process can be shortened, and the tack welding is completely welded within a short time. Since it is possible to obtain the same effect as one, it is possible to provide the advantage that the accuracy of welding is increased and the defect rate is decreased.

The effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within a range apparent to those of ordinary skill in the art from the contents to be described below.

1 is a diagram showing a schematic configuration of an automatic welding system according to an embodiment of the present invention.
2 is a view showing a connection relationship between the mounting portion and the lifting portion of FIG. 1.
3 is a view showing the horizontal frame of FIG. 2.
4 is a view showing the lifting unit of FIG. 2.
5 is a view showing a schematic configuration of an automatic welding system according to another embodiment of the present invention.
6 and 7 are views showing the rotating part of FIG. 5.
8 is a view showing the rotating ring of FIG. 6.
9 is a view showing the rotating gear of FIG. 7.
10 is a view showing another embodiment of the fastening gear of FIG. 9.

DETAILED DESCRIPTION OF THE INVENTION The detailed description of the present invention to be described later refers to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. These embodiments are described in detail sufficient to enable a person skilled in the art to practice the present invention. It is to be understood that the various embodiments of the present invention are different from each other, but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention in relation to one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description to be described below is not intended to be taken in a limiting sense, and the scope of the present invention, if appropriately described, is limited only by the appended claims, along with all scopes equivalent to those claimed by the claims. Like reference numerals in the drawings refer to the same or similar functions over several aspects.

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

1 is a diagram showing a schematic configuration of an automatic welding system according to an embodiment of the present invention.

Referring to FIG. 1, an automatic welding system 10 according to an embodiment of the present invention includes a mounting portion 100, an elevation portion 200, and a welding portion 300.

The mounting portion 100 mounts the object to be welded (P) in a tack-welded state that is lifted and supported by the elevating portion 200, and the welding portion 300 is installed on the upper side.

The lifting part 200 lifts the welded object P so that it can be mounted on the mounting part 100 when the welded object P is seated on the upper side.

The welding part 300 is installed on the upper side of the mounting part 100 and performs welding while moving along the tack-welded portion of the object P exposed through the mounting part 100.

The automatic welding system 10 according to an embodiment of the present invention having the configuration as described above automatically performs welding while placing the object to be welded in a state of being tack-welded in a pipe shape, thereby reducing the time required for the welding process. It can be shortened, and since it is possible to obtain the same effect as that of completely welding the tack welding within a short time, it is possible to provide an advantage of increasing the accuracy of welding and lowering the defect rate.

2 is a view showing a connection relationship between the mounting portion and the lifting portion of FIG. 1.

Referring to FIG. 2, the mounting unit 100 includes a mounting frame 110, a mounting bar 120, a clamp 130, a base frame 140, and an elevating slider 150.

The mounting frame 110 includes a horizontal frame 111 extending in a horizontal direction, and a vertical frame 112 extending from the rear end of the horizontal frame 111 in a downward right angle direction.

In one embodiment, the horizontal frame 111, as shown in FIG. 3, the first pressure plate 1111, the second pressure plate 1112, the first insulation portion 1113, and the second insulation portion 1114 It may include.

The first pressing plate 1111 presses an upper side of the object P mounted on the mounting bar 120 so that the object P does not move during the welding process.

The second pressure plate 1112 is installed to be spaced apart from the first pressure plate 1111 to the other side, and the object to be welded (P) mounted on the mounting bar 120 so that the object to be welded (P) does not move during the welding process. Press the other side of the top.

The first insulating portion 1113 is installed along the other side of the first pressing plate 1111 facing the second pressing plate 1112.

The second insulating part 1114 is installed along one side of the second pressure plate 1112 facing the first pressure plate 1111, and the space 1115 for exposing the welded portion of the object P to the upper side. ) Is installed to be spaced apart from the first insulating part 1113 to form a ).

The mounting bar 120 is spaced downward from the horizontal frame 111 and faces the horizontal frame 111 from the front end of the vertical frame 112 and extends in the shear horizontal direction, and the object to be welded (P) can be mounted. The front end is fastened by the clamp 130 so that the inner upper side of the welded object P is seated.

The clamp 130 is connected and installed so that one end is rotatable to the front end of the horizontal frame 111, so that the object to be welded (P) mounted on the mounting bar 120 is not separated from the mounting bar 120 during the welding process. The other end rotates downward to fasten the front end of the mounting bar 120 in which the object P is mounted.

The base frame 140 is formed to extend from the lower side of the vertical frame 112 in the shear horizontal direction to support the mounting frame 110.

The elevating slider 150 is installed along the front of the vertical frame 112 so that the rear end of the elevating portion 200 is installed, and the elevating portion corresponding to the height of the object P mounted on the mounting bar 120 It raises or lowers the elevating part 200 so that 200 can support the lower side of the welded object P.

The mounting portion 100 having the configuration as described above is formed in a "c" shape in which the front end is open, and by stably mounting the welded object P seated in the inner space, the welding portion installed on the upper side ( 300) can be performed stably.

4 is a view showing the lifting unit of FIG. 2.

Referring to FIG. 4, the elevating part 200 includes a "V" type support 210, a first support 220, a second support 230, a first ball head 240, and a second ball head 250 ), a first advance roller 260 and a second advance roller 270.

The "V" type support 210 is bent in a "V" shape to support the lower one side and the other side of the welded object P and is formed to extend in the front and rear longitudinal direction, and the rear end is on the elevating slider 150 It is installed and is raised or lowered by the elevating slider 150 while the object to be welded (P) is mounted on the upper side.

The first pedestal 220 is spaced apart from one side of the “V”-shaped support 210 to support one lower side of the object P to be welded and extends in the front and rear longitudinal direction.

The second pedestal 230 is spaced apart from the other side of the “V” type support 210 so as to support the other lower side of the object P to be welded and extends in the front and rear longitudinal direction.

A plurality of first ball heads 240 are installed to be spaced apart from each other at equal intervals along the inner side of one side of the "V" type support 210 facing the lower side of the object P to be welded.

A plurality of second ball heads 250 are installed to be spaced apart from each other at equal intervals along the inner side of the other side of the "V" type support 210 facing the other lower side of the object P to be welded.

The first advancing roller 260 is a first advancing roller facing the lower one side of the welded object P so as to reduce the frictional force of the welded object P moving from the front end to the rear end of the "V" type support 210 A plurality of dogs are installed spaced apart from each other at equal intervals along the inner side of the pedestal 220.

The second advancing roller 270 is a material facing the other side of the lower part of the welded object P so as to reduce the frictional force of the welded object P moving from the front end to the rear end of the "V"-type support 210 2 A plurality of pieces are installed spaced apart from each other at equal intervals along the inner side of the pedestal 230.

The lifting unit 200 having the configuration as described above improves the work efficiency of the operator by allowing it to be performed smoothly and stably without the great effort of the operator in the movement of the front and rear longitudinal direction of the welded object P seated on the upper side. Can give.

5 is a view showing a schematic configuration of an automatic welding system according to another embodiment of the present invention.

Referring to FIG. 5, an automatic welding system 20 according to another embodiment of the present invention includes a mounting part 100, an elevating part 200, a welding part 300, and a rotating part 400.

Here, the mounting portion 100, the elevating portion 200, and the welding portion 300 are the same as those of FIG. 1, and thus description thereof will be omitted.

The rotating part 400 rotates the object P mounted on the mounting bar 120 while being mounted on the mounting bar 120.

The automatic welding system 20 according to another embodiment of the present invention having the configuration as described above is supported by the elevating unit 200 to receive the welded object P mounted on the inside of the mounting unit 100 It can be rotated using the rotating part 400 without separating from (100) so that the welding of various parts of the object to be welded (P) can be effectively performed.

6 and 7 are views showing the rotating part of FIG. 5.

6 and 7, the rotating part 400 includes a rotating ring 410, a fastening jig 420, a rotating gear 430, and a driving motor 440.

The rotating ring 410 is formed in a circular ring shape corresponding to the diameter of the object to be welded (P) and installed at the front end of the object (P) to rotate clockwise or counterclockwise while rotating the object (P) together. Let it.

A plurality of fastening jigs 420 are installed along the rear end of the rotating ring 410 to fasten the welded object P so that the welded object P does not move during rotation.

The rotating gear 430 is engaged and connected to the lower side of the rotating ring 410, and rotates the rotating ring 410 while rotating in a clockwise or counterclockwise direction by driving of the driving motor 440.

The drive motor 440 is installed at the front end of the rotation gear 430 to rotate the rotation gear 430.

The rotating part 400 having the configuration as described above is supported by the lifting part 200 and rotated without separating the welded object P mounted on the inside of the mounting part 100 from the mounting part 100. Welding of various parts of the weldment P can be performed effectively.

8 is a view showing the rotating ring of FIG. 6.

Referring to FIG. 8, the rotating ring 410 includes a ring body 411, a through hole 412, a fastening groove 413, a fastening bolt 414 and a fastening nut 415.

The ring body 411 is formed extending in the longitudinal direction, and after being rolled round, one end and the other end are fastened to each other to form a ring shape.

The through holes 412 are repeatedly formed at regular intervals along the ring body 411.

The fastening groove 413 is formed between the front end of the through hole 412 and the front end of the ring body 411, and between the rear end of the through hole 412 and the rear end of the ring body 411.

The fastening bolt 414 is inserted through a fastening groove 413 located on the upper side in a state in which one end and the other end of the ring body 411 are stacked, and the lower part is moved downward through a fastening groove 413 located at the lower side. Exposed.

The fastening nut 415 is fastened to the lower part of the fastening bolt 414.

The rotating ring 410 having the above-described configuration allows the fastening of the welded material P of various diameters to be fastened by freely adjusting the fastening length of the ring body 411 corresponding to the diameter of the welded material P. So you can improve work efficiency.

9 is a view showing the rotating gear of FIG. 7.

Referring to FIG. 9, the rotation gear 430 includes a gear cylinder 431 and a fastening gear 432.

The gear cylinder 431 is formed in a cylindrical shape, is installed in close contact with the lower side of the rotary ring 410, and rotates according to the rotation of the driving motor.

In one embodiment, the gear cylinder 431 has a plurality of gear installation grooves 4311 along the circumference so that the fastening gear 432 can be inserted and installed at equal intervals corresponding to the number of fastening gears 432 Can be.

A plurality of fastening gears 432 are installed at regular intervals along the circumference of the gear cylinder 431, and are sequentially inserted into the through holes 412 as the gear cylinder 431 is rotated while rotating the rotating ring 410 Let me do it.

In one embodiment, the fastening gear 432 may include a gear blade 4321, a protrusion 4322, and an elastic body 4323.

The gear blade 4321 is inserted and installed in the gear installation groove 4311, and one end exposed to the outside of the gear installation groove 4311 to be inserted into the through hole 412 is formed in a round loudspeaker shape 4321a. .

The protrusion 4322 is caught by a separation prevention protrusion 4312 protruding in the inward direction along the inlet of the gear installation groove 4311 so that the gear blade 4321 is not separated from the gear installation groove 4311 ) Protruding along the outer peripheral surface of the other end.

The elastic body 4323 is installed inside the gear installation groove 4311 and supports the other end of the gear blade 4321 by using an elastic force.

The rotating gear 430 having the configuration as described above rotates the rotating ring 410 using the fastening gear 432 inserted into the through hole 412 while rotating in close contact with the lower side of the rotating ring 410 It is possible to rotate the object to be welded (P) fastened by the rotary ring 410.

At this time, when the fastening gear 432 is not correctly inserted into the through hole 412, the fastening gear 432 is inserted into the gear cylinder 431 through the gear installation groove 4311, and the fastening gear 432 By this, it is possible to prevent the rotation ring 410 from being damaged.

10 is a view showing another embodiment of the fastening gear of FIG. 9.

Referring to FIG. 10, a fastening gear 432 according to another embodiment includes a gear blade 4321, a protrusion 4322, an elastic body 4323, and a sliding protrusion 4324.

Here, since the gear blade 4321, the protrusion 4322, and the elastic body 4323 are the same as those of FIG. 9, their description will be omitted.

The sliding protrusion 4324 is installed on the outer circumferential surface of the gear blade 4321 and is seated in a zigzag groove 4313 extending in a zigzag shape along the inner circumferential surface of the gear installation groove 4311 in the center direction of the gear cylinder 431 , As the gear blade 4321 is inserted into the gear installation groove 4311, it changes in the sliding direction in the left and right direction along the zigzag groove 4313 and moves in response to the shape of the zigzag groove 4313 ) To move.

In the fastening gear 432 according to another embodiment having the configuration as described above, when the fastening gear 432 is not accurately inserted into the through hole 412, the fastening gear 432 is the gear installation groove 4311 The gear blade 4321 is vibrated in response to the shape of the zigzag groove 4313 while being inserted into the gear cylinder 431 through, so that the gear blade 4321 is inserted into the through hole 412 during the vibrating process. Thus, it may be possible to continuously rotate the rotary ring 410 by the rotary gear 430.

The above-described embodiments are for illustration only, and those of ordinary skill in the art to which the above-described embodiments belong can easily transform into other specific forms without changing the technical idea or essential features of the above-described embodiments. You can understand. Therefore, it should be understood that the above-described embodiments are illustrative and non-limiting in all respects. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope to be protected through the present specification is indicated by the claims to be described later rather than the detailed description, and should be interpreted as including all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof. .

10, 20: automatic welding system
100: mounting portion
200: elevator
300: weld
400: rotating part

Claims (2)

A mounting portion for mounting an object to be welded in a temporary welding state;
An elevating unit for raising and lowering the welded object so that the object to be welded can be mounted on the mounting portion when the object is mounted on the upper side; And
Including; is installed on the upper side of the mounting portion, a welding portion for performing welding while moving along the temporary welding portion of the object to be welded exposed through the mounting portion,
The mounting portion may include a horizontal frame extending in a horizontal direction, and a vertical frame extending from a rear end of the horizontal frame in a lower right angle direction to form a vertical frame; A mounting bar spaced downward from the horizontal frame, facing the horizontal frame from the front end of the vertical frame, extending in a horizontal direction, and mounting the inner upper side of the welded material so that the welded material can be mounted; One end is rotatably connected to the front end of the horizontal frame, and the other end is rotated downward so that the object to be welded mounted on the mounting bar is not separated from the mounting bar during the welding process, so that the object is mounted. A clamp for fastening the front end of the mounting bar; A base frame extending from a lower side of the vertical frame in a shear horizontal direction to support the mounting frame; And it is installed along the front of the vertical frame, the rear end of the lifting part is installed, and the lifting part is raised or lowered so that the lifting part supports the lower side of the welded object corresponding to the height of the welded object mounted on the mounting bar. Includes; an elevating slider for descending,
The horizontal frame includes: a first pressing plate for pressing an upper side of the object to be welded mounted on the mounting bar so that the object to be welded does not move during a welding process; A second pressure plate that is installed to be spaced apart from the first pressure plate to the other side and presses the other side of the upper portion of the object to be welded on the mounting bar so that the object to be welded does not move during the welding process; A first insulating part installed along the other side of the first pressing plate facing the second pressing plate; And a second pressure plate installed along one side of the second pressure plate facing the first pressure plate, and spaced apart from the first insulating portion so as to form a space for exposing the welding portion of the welded object upward. Including; 2 insulation parts,
The elevating part is bent in a "V" shape so as to support the lower one side and the other side of the welded object and extended in the front and rear longitudinal direction, and the rear end is installed on the elevating slider; A first support spaced apart from one side of the "V" type support and extending in the front and rear longitudinal direction so as to support a lower side of the welded object; A second support spaced apart from the other side of the "V" type support and extending in the front and rear longitudinal direction to support the other lower side of the welded object; A plurality of first ball heads are installed spaced apart from each other at equal intervals along an inner surface of one side of the "V" type support that faces the lower side of the welded object; A second ball head in which a plurality of pieces are spaced apart from each other at equal intervals along the inner side of the other side of the "V"-shaped support that faces the other lower side of the welded object; A plurality of pieces are spaced apart from each other at equal intervals along the inner side of the first support facing the lower one side of the welded material so as to reduce the frictional force of the welded material moving from the front end to the rear end of the "V" type support A first forward roller installed; And a plurality of each other at equal intervals along the inner side of the second pedestal facing the other lower side of the welded object so as to reduce the frictional force of the welded object moving from the front end to the rear end of the "V" type support. It includes; a second forward roller that is installed to be spaced apart,
Further comprising; a rotating part for rotating the object to be welded mounted on the mounting bar in a state mounted on the mounting bar,
The rotating part may include a rotating ring formed in the shape of a circular ring corresponding to the diameter of the object to be welded and installed at the front end of the object to rotate clockwise or counterclockwise to rotate the object to be welded together; A plurality of fastening jigs installed along the rear end of the rotary ring to fasten the welded object so that the welded object cannot move during rotation; A rotating gear engaged with and connected to the lower side of the rotating ring and rotating the rotating ring while rotating in a clockwise or counterclockwise direction; And a drive motor installed at a front end of the rotation gear to rotate the rotation gear,
The rotary ring is formed to extend in the longitudinal direction, the ring body is formed in a ring shape by one end and the other end is fastened to each other after being rolled round; Through holes repeatedly formed at regular intervals along the ring body; A fastening groove formed between a front end of the through hole and a front end of the ring body, and between a rear end of the through hole and a rear end of the ring body; A fastening bolt in which one end and the other end of the ring body are stacked and inserted through a fastening groove positioned at an upper side and then exposed to a lower side through a fastening recess positioned at a lower side; And a fastening nut fastened to a lower portion of the fastening bolt,
The rotation gear is formed in a cylindrical shape, is installed in close contact with the lower side of the rotation ring, the gear cylinder rotates according to the rotation of the drive motor; And a plurality of fastening gears that are installed at regular intervals along the periphery of the gear cylinder, and are sequentially inserted into the through holes as the gear cylinder is rotated to rotate the rotation ring,
In the gear cylinder, a plurality of gear installation grooves are formed along the circumference so that the fastening gear can be inserted and installed at equal intervals corresponding to the number of the fastening gears,
The fastening gear may include a gear blade inserted into the gear installation groove and having one end exposed to the outside of the gear installation groove to be inserted into the through hole to be formed in a round loud shape; A protrusion protruding along the outer circumferential surface of the other end of the gear blade so as to prevent the gear blade from being separated from the gear installation groove by being caught in a separation prevention jaw protruding in an inward direction along the inlet of the gear installation groove; And an elastic body installed inside the gear installation groove to support the other end of the gear blade using an elastic force. delete

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