KR20130138453A - Circumference welding apparatus using clutch for adjusting height of welding torch - Google Patents

Abstract

The present invention relates to a circumference welding apparatus with a clutch for adjusting the level of a welding torch, whereby the invention is to weld a nozzle in the direction to a shell which is a cylindrical pressure container by being equipped with the clutch and controlling a driving force of a rotary body so that the invention is capable of adjusting the level of a control unit to easily set the level of the welding torch. The invention comprises: a clutch unit (9) which is installed between a rotary body unit (2) and a level adjusting unit (4), and transfers or cuts off power of the rotary body unit to the level adjusting unit (4) by the rotation of a clutch lever unit (913). The level adjusting unit includes a block (401) connected to a driven clutch (912) to rotate which includes the clutch unit (9); a screw (402) which is connected to the block with screws and includes an adjusting handle (4021) at one side; and a level adjusting body (404) with gradations on the surface which supports both ends of the screw to rotate the screw and is hinged to a link slide at one side. When the power supplied to the clutch unit is cut off, the circumference welding apparatus adjusts the level of the welding torch. [Reference numerals] (AA) Welding unit;(BB) Nozzle;(CC) Shell

Description

Circumference welding apparatus using clutch for adjusting height of welding torch}

The present invention relates to a circumferential welding device having a clutch for adjusting the height of a welding torch, and more particularly, a welding torch for welding a welding part by breaking the rotational power of the circumferential welding device provided at the top of the nozzle to weld the nozzle in a shell side direction, which is a cylindrical pressure vessel. A welding apparatus having a clutch for aligning height and vertical state.

Representative of the pressure vessel among the plant equipment is a cylindrical shell (Shell) and the nozzle (Nozzle) is formed on the surface of the shell. 10 is an exemplary view showing a coupling shape of a representative cell and a nozzle. In this case, when the cylindrical nozzle is formed in the cylindrical shell, the nozzle is formed vertically to one side of the shell, and thus the shape of the weld part varies depending on which point of the shell is located.

The shape of the nozzle welded portion welded to the shell is shown in Figures 11 to 14, Figure 11 is an exemplary view showing the shape of the nozzle mounting, Figure 12 is an exemplary view showing a nozzle shape and the welded portion, Figure 13 is a welded shape 14 is an exemplary view showing a three-dimensional shape of a welded portion. As shown, the nozzle is divided into a case where the center line of the nozzle meets a center line of the shell and a case where the nozzle does not meet. The weld is outside the shell if the centerline of the nozzle meets the centerline of the shell, otherwise the weld is inside the shell. In addition, each welding part maintains the origin. At this time, since the weld is in a circular shell, there is the same height difference as shown, and is not located in one plane, and a continuous height change occurs along the surface of the shell, and the amount of height change depends on the diameter of the nozzle and the shell. Different.

For this reason, in the welding method of the nozzle, a welding torch is welded between the shell and the nozzle while the welding torch moves along the circumference of the nozzle as the welding device is rotated with the circumferential welding device installed on the nozzle. In order to cope with the change in height difference, welding is performed while moving up and down. The welding method used is usually the submerged arc welding method.

The conventional structure of the circumferential welding device for welding between the shell and the nozzle as described above is shown in FIG. Conventional circumferential welding apparatus as shown, the nozzle coupling portion (1) coupled to the upper nozzle; A main rotating shaft 201 installed perpendicularly to the nozzle fastening portion, and a rotating gear 202 installed at an upper end of the main rotating shaft; A motor gear 203 meshed with the rotary gear to transmit power at one side, a motor 204 coupled with the motor gear, and a spur gear 205 meshed with the rotary gear at the other side to transmit power to the power converter; A rotating body part 2 including a main rotating shaft, a rotating gear, a motor gear, and a case in which the main rotating shaft, the motor, and the motor are rotated together with the main rotating shaft; The worm gear 301 is axially coupled to the spur gear 205 of the rotating part, the shaft 302 formed on the upper end, the worm wheel 303 for changing the rotation direction by receiving the power of the worm gear, and the worm wheel shaft worm wheel shaft A power converter 3 composed of 304; An up and down height adjustment part 4 composed of a cam-shaped block which is coupled to the worm wheel shaft 304 of the power converter; The link 502 hinged by the hinge pin 501 at one point with the up and down height adjustment portion, and is connected to the other side of the link is installed on the rotating body portion 2 in accordance with the rotation of the up and down height adjustment portion (4) A link slider 5 composed of a slider block 504 moving up and down in the vertical slider rail 503; A horizontal slider 6 inserted in the slider block 504 of the link slider 5 in a horizontal direction and moving in a horizontal direction; A vertical slider 7 coupled vertically to one end of the horizontal slider and moving in a vertical direction; It consists of a welding torch 8 protruding in the lower direction of the vertical slider.

In the circumferential welding device configured as described above, the rotating torso 2 rotates around the nozzle coupling portion 1 coupled to the nozzle upper portion, and the welding torch 8 performs submerged arc welding between the nozzle and the shell. , The welding torch moves up and down height adjustment part 4 coupled with the shaft while the vertical height adjustment part 4 is axially coupled with the power conversion part 3 which receives some rotational power of the rotating body part simultaneously with the rotation of the welding torch. To change the height of the welding torch.

For this reason, it is important for the conventional circumferential welding apparatus as described above to set the welding torch at the highest point and the lowest point according to the shape of the weld between the nozzle and the shell. If this setting is wrong, the welding torch is positioned at a lower or higher position than the lowest or highest point, resulting in uneven welding. That is, the width moved up and down of the welding equipment cannot be measured through the measuring device. The reason for this is that the diameter varies with the diameter of the nozzle and shell, and the height difference depends on the degree of processing of the improved shape. In addition, the welding member is preheated (continuously heated with a gas torch on the opposite side of the weld), which makes it difficult to attach and measure the measuring equipment. Because of this problem, the welding torch of the welding equipment is actually moved and the upper and lower heights are adjusted.

However, in the conventional equipment, when the welding equipment is rotated (rotated with power), the welding torch is also moved up and down at the same time. It also rotates the Shanghaidong adjustment slider of the welding torch. The rotating shank adjustment slider should be erected vertically at the maximum and minimum height of the weld to ensure that the weld torch's peak and trough are aligned. 9, the highest point of the welding torch is when the vertical height adjustment part is erected vertically. With the upper and lower height adjusters vertically aligned with the highest and lowest points of the welded part, unfasten the part where the welding equipment is fixed, that is, the part connected with the nozzle (usually bolting), and turn off the rotational power so that the upper and lower height adjusters do not rotate. After reaching the vertical state, the top and bottom heights were adjusted by adjusting the vertical height while adjusting the vertical position of the vertical height adjustment part. However, there was a disadvantage that it takes a lot of time to release and reassemble this bolting.

Korean Patent Publication No. 10-2004-0024060 (2004.03.20.) Korean Patent Registration Publication No. 10-0451826 (2004.09.24) Korean Patent Registration Publication No. 10-0323796 (2002.01.25)

An object of the present invention for solving the above problems is the rotational driving force of the rotating body portion constituting the circumferential welding device having a clutch in the circumferential welding device installed on the top of the nozzle to weld the nozzle in the shell side direction, which is a cylindrical pressure vessel It is to provide a circumferential welding device for easily setting the vertical height of the welding torch in contact with the welding portion by controlling the application arbitrarily to adjust the height and vertical state of the vertical height adjustment portion.

The present invention to achieve the object as described above and to perform the problem for eliminating the conventional drawbacks is a nozzle coupling portion coupled to the top of the nozzle to weld the weld between the shell and the nozzle is attached to the pressure vessel; A rotating body part axially coupled to the nozzle fastening part to apply rotational power; A vertical height adjusting part which receives the rotational force of the rotating body part through a spur gear and rotates up and down to adjust the vertical height of the welding torch; A link slider connected to the vertical height adjusting part and moving in the vertical direction; A horizontal slider installed in the link slider to move in a horizontal direction to adjust a horizontal position of the welding torch; A vertical slider installed in the horizontal slider to move in the vertical direction to adjust the vertical position of the welding torch; In the circumferential welding device comprising a welding torch installed in the vertical slider,

It is installed between the rotating body portion and the vertical height adjustment portion, and further comprises a clutch portion configured to transmit or break the power of the rotating body portion to the vertical height adjustment portion by the rotation of the clutch lever,

The upper and lower height adjusting unit is coupled to the driven clutch constituting the clutch unit, the block is rotated, screwed through the block, the screw is provided with an adjustment handle at one end, and rotates by supporting both ends of the rotating screw and one point There is provided a circumferential welding device having a welding torch height adjustment clutch, characterized in that the link slider is hinged and the surface is formed of a height adjusting body having a scale formed to adjust the vertical height when the power of the clutch unit is cut off. Is achieved.

According to a preferred embodiment of the present invention, the clutch part includes: a shaft having a worm gear axially coupled to the spur gear constituting the rotating body part; A worm wheel which receives a power of a worm gear and changes a rotation direction; A spline shaft in which a worm wheel is axially coupled and a shaft keyway is formed at a point opposite to the worm wheel; A key inserted into the shaft keyway; It is installed around one side of the spline shaft, the inner diameter of the clutch key groove is inserted into the key is inserted into the shaft key groove, the outer circumference of the clutch groove is formed by inserting the push pin of the clutch lever portion is formed forward and backward, drive uneven portion on one side A drive clutch that is formed to apply or block power to and from the driven clutch during forward and backward advance by the clutch lever portion; A driven clutch to which power is applied or transmitted according to forward and backward movement of the drive clutch, and a driven uneven portion is formed at one end thereof engaged with the drive clutch; A clutch lever part installed at an upper portion of the drive clutch to control forward and backward movement of the drive clutch through a push pin inserted into a clutch groove; A clutch spring that provides a cushioning force when the drive clutch is reversed; It may be made of a holding ring installed on the front end of the bearing for supporting the rotation of the spline shaft so as to support it when the clutch spring is compressed.

According to a preferred embodiment of the present invention, the clutch lever part includes a clutch body which is coupled to and coupled to an upper portion of a housing of the clutch part; A clutch lever coupled to the clutch shaft with protrusions formed at a lower portion passing through the clutch body to rotate; A block formed at a lower portion of the clutch body and having a groove formed therein, wherein a groove into which a protrusion formed at the lower portion of the clutch shaft is inserted; A pin hinged through the clutch body and the clutch lever; And a push pin inserted into the other side block of the pin and inserted into the clutch groove of the drive clutch to apply the rotational force of the clutch lever.

As described above, the present invention is required by arbitrarily controlling the application of the rotational driving force of the rotating body constituting the circumferential welding device by providing a clutch in the circumferential welding device installed at the top of the nozzle to weld the nozzle in the shell side direction, which is a cylindrical pressure vessel. It is possible to easily set the vertical height of the welding torch in contact with the welding part by adjusting the height and verticality of the vertical height adjusting part at the point, which can significantly reduce the preset time required to perform welding by installing the circumferential welding device in the nozzle. It is a useful invention having an industrial invention that is expected to use greatly.

1 is an exemplary view showing the entire cross-sectional configuration of the circumferential welding device including a clutch unit according to an embodiment of the present invention,
2 is a cross-sectional view illustrating a clutch unit according to an embodiment of the present invention;
3 is a perspective view and a plan view of a clutch unit according to an embodiment of the present invention;
Figure 4 is a perspective view showing a clutch lever portion constituting the clutch portion according to an embodiment of the present invention,
5 is an exemplary view showing a plan view, a front view and a side view of a clutch lever unit according to an embodiment of the present invention;
6 is a partial cutaway perspective view of the clutch unit showing a state before operation of the clutch lever unit according to an embodiment of the present invention;
7 is a partially cutaway perspective view of the clutch unit showing a state during rotation of the clutch lever unit according to an embodiment of the present invention;
8 is a partial cutaway perspective view of the clutch unit showing a power cut state after the rotation of the clutch lever unit according to the exemplary embodiment of the present invention;
9 is an exemplary view showing a state in which the vertical height adjustment unit rotates the lowest point and the highest point section while the power is applied according to an embodiment of the present invention.
10 is an exemplary view showing a coupling shape of a representative cell and a nozzle,
11 is an exemplary view showing the shape of the nozzle mounting;
12 is an exemplary view showing a nozzle shape and a welded part,
13 is an exemplary view showing a welded shape;
14 is an exemplary view showing a three-dimensional shape of a welded part,
15 is a general circumferential welding device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is an exemplary view showing the entire cross-sectional configuration of the circumferential welding device including a clutch unit according to an embodiment of the present invention, Figure 2 is an exemplary cross-sectional view of the clutch unit according to an embodiment of the present invention, Figure 3 is the present invention 4 is a perspective view and a plan view of a clutch unit according to an embodiment of the present invention, and FIG. 4 is a perspective view showing a clutch lever unit configuring a clutch unit according to an embodiment of the present invention, and FIG. 5 is a plan view of a clutch lever unit according to an embodiment of the present invention. Is an exemplary view showing a front view and a side view.

As shown in the present invention, the circumferential welding device of the present invention has a nozzle coupling part 1 coupled to an upper part of a nozzle to be vertically welded in one direction of a shell, which is a pressure container, to form a lower part. The fastening method is typically integrated with the bolt nut fastening method. After welding, the nozzle clamping part may be dismantled and moved to another nozzle.

A main shaft (201) installed in the nozzle coupling unit (1), which is vertically coupled to the shaft, and a rotary gear (202) installed at an upper end of the main shaft; A motor gear 203 meshed with the rotary gear to transmit power at one side, a motor 204 coupled with the motor gear, and a spur gear 205 meshed with the rotary gear at the other side to transmit power to the clutch unit; Rotating body portion 2 is configured including a main rotating shaft, a rotating gear, a motor gear and a motor is installed therein and includes a case 206 rotating together with the main rotating shaft. The motor may be configured to weld at a low speed by a reduction ratio using a general motor, or may use a servo motor or a step motor for more precise rotation.

The power applied from the rotating body portion 2 is to transmit or stop the power in the clutch portion 9 according to the present invention, specifically looking at the clutch portion 9 of the spur gear 205 of the rotating body portion 2 Shaft 902 axially coupled to the shaft 902 is formed on the top, the worm wheel 903 for switching the rotation direction by receiving the power of the worm gear, and the worm wheel is coupled to the shaft keyway 904 at one point opposite the worm wheel The formed spline shaft 905, the key 906 is inserted into the shaft key groove 904, the spline shaft 905 is installed around one side of the key 906 is inserted into the shaft key groove 904 is inserted into the inner diameter A clutch key groove 907 is formed, and a clutch groove 908 is formed in which the push pin of the clutch lever part is inserted in the outer circumference of the clutch key groove 908, and a drive uneven portion 909 is formed on one side thereof. Power is applied to driven clutch when moving forward and backward Or a drive clutch 910 for blocking, a driven clutch 912 having power driven or transmitted according to forward and backward movement of the drive clutch, and a drift uneven portion 911 formed at one end thereof engaged with the drive clutch, and the drive. A clutch lever portion 913 installed at an upper portion of the clutch 910 to control the forward and backward movement of the drive clutch 910 through a push pin inserted into the clutch groove 908, and a buffering force when the drive clutch 910 is reversed; It is composed of a clutch spring 914 for providing a holding ring 916 installed in front of the bearing 915 to support the rotation of the spline shaft 905 to support it when the clutch spring 914 is compressed.

The clutch lever portion 913 rotates by being coupled to a clutch body 9131 which is in contact with and coupled to an upper portion of the housing forming the outer shape of the clutch portion 9, and a clutch shaft 9332 having protrusions formed at a lower portion thereof that penetrates the clutch body. A clutch lever 9333 to be used; A block 9136 formed at an upper portion of the clutch 9913 formed at a lower portion of the clutch body 9131 and into which a protrusion 9134 is inserted at a lower portion of the clutch shaft, and between the clutch body 9131 and the clutch lever 9333. It is composed of a pin (9137) through which the hinge is coupled and a push pin (9138) is inserted into the other side block of the pin and inserted into the clutch groove (908) of the drive clutch (910) to apply the rotational force of the clutch lever.

Up and down height adjustment unit 4, the power is transmitted or blocked by the clutch unit 9 is coupled to the driven clutch 912 of the clutch 9, the block 401 is rotated, screwed through the block And a screw 402 equipped with a control handle 4021 at one end and rotates by supporting both ends of the rotating screw, and a link slider is hinged at one point and a scale 403 is formed on the surface. The main body 404 is configured to adjust the vertical height when the clutch unit power is cut off.

That is, when the clutch lever part 913 rotates and the push pin 9136 pushes the clutch groove 908 of the drive clutch 910, the drive uneven portion 909 of the driven clutch and the drive uneven portion 911 of the drive clutch are rotated. The engagement state of the liver is released. In this state, the power of the rotating body part 2 is cut off from the clutch part 9, and the adjustment handle 4021 is turned on the vertical height adjusting part 4 connected to the clutch part. When the screw 402 rotates, the driven block 401 coupled with the driven clutch 912 is moved in one direction. At this time, the scale 403 formed on the height adjusting body 404 in accordance with the required adjustment amount is precisely watched. By adjusting the upper and lower heights by adjusting the upper and lower heights, the link slider 5 to be described later connected with the upper and lower height adjusting parts 4 is interlocked to cope with the height difference of the welded part.

In addition, the height adjustment body 404 and the link 502 hinged by the hinge pin 501 at one point, and the upper and lower height adjustment unit is connected to the other side of the link and rotates in accordance with the rotation of the vertical height adjustment unit (4) It consists of a link slider 5 made of a slider block 504 moving in the vertical direction from the vertical slider rail 503 installed in the body portion (2).

In addition, a horizontal slider 6 is inserted into the slider block 504 of the link slider 5 and moves horizontally.

It is also composed of a vertical slider 7 coupled vertically to one end of the horizontal slider to move in the vertical direction.

In addition, a welding torch 8 protruding in the lower direction of the vertical slider is configured. The welding torch mainly performs SA welding. To this end, welding is continuously performed to perform welding.

That is, the height adjustment by the up and down height adjustment unit 4, when the link slider 5 moves up and down, the welding torch moves together with the horizontal slider 6 and the vertical slider 7 for adjusting the vertical position of the welding torch. The height and position of (8) will be controlled.

Unexplained reference numeral 10 denotes a controller for automatically or manually controlling the circumferential welding device of the present invention.

6 is a partially cutaway perspective view of a clutch unit showing a state before the clutch lever unit according to an embodiment of the present invention, and FIG. 7 is a partially cutaway perspective view of the clutch unit showing a state during rotation of the clutch lever unit according to an embodiment of the present invention. 8 is a partially cutaway perspective view of the clutch unit showing a power cut state after the rotation of the clutch lever unit according to the exemplary embodiment of the present invention.

As shown, the clutch lever part constituting the circumferential welding apparatus according to the present invention is a device that can increase the installation convenience when controlling the vertical movement of the welding torch. That is, when rotational power transmission is required, as shown in FIG. 6, when the clutch lever 9133 is turned off, the power of the rotational body part 2 is applied to perform a welding run, and the welding torch is aligned to the welding portion between the shell and the nozzle. If necessary, while rotating as shown in FIG. 7, the clutch lever 9133 is rotated until it is in the state of FIG. 8, and when it is turned on, power of the rotating body part 2 is completely cut off.

That is, when the clutch lever part 913 rotates and the push pin 9136 pushes the clutch groove 908 of the drive clutch 910, the drive uneven portion 909 of the driven clutch and the drive uneven portion 911 of the drive clutch are rotated. The engagement state of the liver is released. In this state, the power of the rotating body part 2 is cut off from the clutch part 9, and the adjustment handle 4021 is turned on the vertical height adjusting part 4 connected to the clutch part. When the screw 402 rotates, the driven block 401 coupled with the driven clutch 912 is moved in one direction. At this time, the scale 403 formed on the height adjusting body 404 in accordance with the required adjustment amount is precisely watched. By adjusting the up and down height, the link slider 5 connected to the up and down height adjustment part 4 moves up and down, and similarly, the horizontal slide for adjusting the up and down position of the welding torch connected to the link slider 5 is performed. 6, and the vertical slider 7 is also controlling the height and position of the welding torch (8) while moving along.

After the adjustment is completed, rotate the clutch lever in the OFF direction to drive the circumferential welding device, move to the part requiring height adjustment, and turn on the clutch again to adjust the height.

9 is an exemplary view showing a state in which the vertical height adjustment unit rotates the lowest point and the highest point section while the power is applied according to an embodiment of the present invention, in which the direction of the clutch lever is turned off according to the present invention. When the circumferential welding device is operated, the rotating body portion 2 rotates and the rotating power applied to the clutch portion 9 is applied to the vertical height adjusting portion 4 to rotate and rotate according to the difference in the weld height between the shell and the nozzle. SA welding is performed while moving. The vertical height difference according to the illustrated embodiment is about 90 mm. The height difference according to this example corresponds to the case of welding in which the weld between the nozzles to be welded to the shell has a height difference of about 90 mm.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

Description of the Related Art
(1): nozzle fastening part (2): rotating body part
(4): up and down height adjustment unit (5): link slider
(6): horizontal slider (7): vertical slider
(8): welding torch (9): clutch part
(10): controller 201: main shaft
(202): Rotating Gear (203): Motor Gear
(204): motor 205: spur gear
(206): case 401: block
(402): screw 403: graduation
(404): height adjusting body (501): hinge pin
502: link 503: up and down slider rails
(504): slider block (901): worm gear
(902): shaft 903: worm wheel
(904): Shaft Keyway (905): Spline Shaft
906: Key 907: Clutch Keyway
908: Clutch Groove 909: Drive Uneven
910: drive clutch 911: driven uneven portion
912: driven clutch 913: clutch lever part
914: Clutch Spring 915: Bearing
(916): holding ring (4021): adjustment handle
(9131): clutch body (9132): clutch shaft
(9133): clutch lever (9134): protrusion
(9135): Home (9136): Block
(9137): Pin (9138): Push Pin

Claims (3)

A nozzle coupling part (1) coupled to the top of the nozzle to weld the welding part between the shell, which is a pressure vessel, and the nozzle attached thereto; A rotating body part 2 which is axially coupled to the nozzle fastening part and applies rotational power; A vertical height adjusting part 4 which receives the rotational force of the rotating body part through the spur gear 205 and rotates up and down to adjust the vertical height of the welding torch; A link slider 5 connected to the vertical height adjusting part 4 and moving vertically in a vertical direction; A horizontal slider 6 mounted to the link slider 5 to move in a horizontal direction to adjust a horizontal position of the welding torch; A vertical slider 7 installed in the horizontal slider 6 to move in the vertical direction to adjust the vertical position of the welding torch; In the circumferential welding device comprising a welding torch (8) provided on the vertical slider (7),
The clutch part is installed between the rotating body part 2 and the vertical height adjusting part 4 and configured to transmit or break the power of the rotating body part to the vertical height adjusting part 4 by the rotation of the clutch lever part 913. (9) further comprises,
The upper and lower height adjustment unit 4 is a block 401 is rotated in combination with the driven clutch 912 constituting the clutch (9) portion, screwed through the block and the adjustment handle 4021 is provided at one end It consists of a screw 402 and the height adjusting body 404 is supported by both ends of the rotating screw to rotate and the link slider is hinged at one point, the scale 403 is formed on the surface to block the power of the clutch portion Circumferential welding device having a welding torch height adjustment clutch, characterized in that configured to adjust the vertical height. The method according to claim 1,
The clutch unit 9 includes a shaft 902 having an upper worm gear 901 axially coupled to the spur gear 205 constituting the rotating body part;
A worm wheel 903 for changing the rotation direction by receiving the power of the worm gear;
A spline shaft 905 in which a worm wheel is axially coupled and a shaft keyway 904 is formed at one point opposite the worm wheel;
A key 906 inserted into the shaft keyway 904;
A clutch key groove 907 is installed around one side of the spline shaft 905, and the key 906 inserted into the shaft key groove 904 is inserted in the inner diameter thereof, and the clutch groove into which the push pin of the clutch lever part is inserted in the outer diameter thereof. The drive clutch 910 is formed to be forward and backward, and the drive uneven portion 909 is formed on one side to apply or block power to the driven clutch when the forward and backward movement by the clutch lever portion;
A driven clutch 912 in which power is applied or transmitted according to forward and backward movement of the drive clutch, and a driven concave-convex portion 911 is formed at one end thereof engaged with the drive clutch;
A clutch lever part 913 installed at an upper portion of the drive clutch 910 to control forward and backward movement of the drive clutch 910 through a push pin inserted into the clutch groove 908;
A clutch spring 914 which provides a cushioning force when the drive clutch 910 is reversed;
Circumferential welding with a welding torch height adjustment clutch, characterized in that consisting of; holding ring 916 installed in front of the bearing 915 to support the rotation of the spline shaft 905 so as to support it when the clutch spring 914 is compressed. Device.
The method according to claim 2,
The clutch lever part 913 is,
A clutch body 9131 which is in contact with and coupled to an upper portion of the housing of the clutch unit 9;
A clutch lever 9333 which rotates by being coupled to a clutch shaft 9132 formed with a protrusion through the clutch body;
A block 9336 formed at a lower portion of the clutch body 9131 and having a groove 9335 formed therein into which a protrusion 9134 formed at a lower portion of the clutch shaft is inserted;
A pin 9139 which is hinged to penetrate between the clutch body 9131 and the clutch lever 9133;
A circumference having a welding torch height adjustment clutch, comprising: a push pin 9338 inserted into the other side block of the pin and inserted into the clutch groove 908 of the drive clutch 910 to apply the rotational force of the clutch lever. Welding equipment.

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