JP6700694B2 - Welding equipment - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding device that welds one of the materials to be welded arranged substantially at right angles as a running surface and the other material as a guide surface of the torch.

  When manufacturing structures such as shipbuilding, bridges, and buildings, it is possible to arrange materials to be welded made of steel plates, stainless steel plates, etc. at a substantially right angle and fillet weld the corners formed at the points where they intersect. It is being appreciated. Such welding is generally performed by mounting a welding torch such as a plasma welding torch or a carbon dioxide welding torch selected according to the material of the material to be welded on a traveling carriage.

  As an advantageous technique when performing fillet welding on a material to be welded arranged at a substantially right angle, there is a traveling carriage described in Patent Document 1, for example. In this traveling carriage, support arms having guide rollers attached to the front and rear ends of the main body are arranged so as to project substantially horizontally. The size of each support arm protruding from the main body is adjusted so that the line connecting the roller tops of the front and rear guide rollers intersects with the extension line (travel direction) of the wheel of the traveling carriage on the downstream side.

  In the traveling carriage configured as described above, when the guide rollers arranged at the front and rear are brought into contact with the surface of the material to be welded upright, the extension lines of the wheels cross the material to be welded. For this reason, when the traveling carriage is caused to travel in this state, each guide roller is pressed against the surface of the material to be welded upright by a part of the force accompanying the traveling of the traveling carriage to rotate. It runs in the direction along the welding material.

Japanese Patent No. 3400290

  In the traveling carriage configured as described above, a pair of guide rollers that are in pressure contact with the surface of the material to be welded upright and guide the traveling direction are arranged in front of and behind the main body, and the welding torch is mounted on the main body. Accordingly, the pair of guide rollers and the welding torch are arranged on the traveling carriage independently of each other, and the tips of these guide rollers and the welding torch are independent from each other. Therefore, when welding is performed, it is necessary to adjust the position of the pair of guide rollers and the position of the welding torch in accordance with the traveling direction. Since such adjustment belongs to a complicated work, it is required to develop a welding device that can start the welding work with a simple adjustment.

  Further, in the case of hull materials and the like, the intended welding site is in the vertical direction, and upward welding is often required. In such welding, a rail is installed in parallel with a target welding line, and a welding device configured to perform welding in the process of raising a traveling carriage along the rail is generally used. In this welding device, after the welding to the upper end is completed, the traveling carriage is lowered along the rails and returned to the initial position on the lower end side. Therefore, there is a problem that it takes time to return to the initial position.

  It is an object of the present invention to provide a welding device that is easy to operate and is compatible with upward welding.

In order to solve the above problems, the welding apparatus according to the present invention is such that the intersection of the materials to be welded arranged at a substantially right angle is arranged in a direction substantially perpendicular to the horizontal plane and the materials to be welded are one of the materials to be welded. A welding device for welding the intersection of the materials to be welded with the traveling surface on which the traveling carriage travels and the other material to be welded as a guide surface of the welding torch, and one welding material having a traveling surface having a rack. And a motor base configured to be movable in a direction of approaching or separating from the rack of the rail, and engaged or separated from the rack when the motor base approaches the rack. Sometimes the pinion is disengaged, the motor having the pinion and fixed to the motor base, the pinion urging member for urging the pinion toward the rack, and the predetermined distance from the motor base. A traveling carriage having a bar arranged and traveling substantially straight along the rail, and arranged from the traveling carriage toward the other workpiece to be welded, and separated from a guide surface of the workpiece to be welded or A sliding member configured to be slidable in an approaching direction, an abutting member arranged at a tip of the sliding member and abutting on the guide surface, and a welding member arranged at a predetermined position of the sliding member. A torch holder for holding a welding torch for welding, and a sliding member biasing member for biasing the sliding member so as to press the contact member arranged at the tip of the sliding member against the guide surface, The motor base is configured to be movable in a direction in which the motor base moves away from or approaches the bar. When the motor base moves away from the bar, the pinion meshes with a rack to rotate the pinion. According to the above, the traveling carriage is caused to travel along the rail, or when the bar approaches the bar, the engagement of the pinion with the rack is released to move the traveling carriage along the rail regardless of the rotation of the pinion. It is configured to let.

  The welding device according to the present invention is a sliding carriage in which a torch holder is arranged at a predetermined position with an abutting member abutting against a guide surface on a traveling carriage capable of traveling in a substantially straight line with one workpiece as a traveling surface. The member is configured to be slidable in a direction in which it separates from or approaches the other material to be welded. Therefore, when the welding torch is attached to the torch holder, the positional relationship between the tip of the welding torch and the tip of the abutting member is adjusted so that the abutting member abuts on the guide surface. The tip of the torch can be aimed at the target welding site.

  Since the abutting member is biased by the sliding member biasing member and is in pressure contact with the guide surface side, even if the traveling direction of the traveling carriage is not exactly parallel to the guide surface, this difference causes sliding. It is absorbed by the sliding of the member. For this reason, the tip of the welding torch can always maintain the posture toward the intended welding site.

  As described above, in the welding device according to the present invention, since the contact member that contacts the guide surface and the torch holder that supports the welding torch are both arranged on the sliding member, when starting the welding operation, the welding torch and It is only necessary to adjust the positional relationship with the contact member. Therefore, stable welding can be performed with a simple adjustment work.

  Further, by configuring the traveling vehicle to travel along the rails provided on the traveling surface, the traveling direction of the traveling vehicle can be easily set.

  In particular, a rack is provided on the rail, a pinion that engages with the rack and a pinion urging member that urges the pinion toward the rack are provided on the traveling carriage, and the pinion engages with or disengages from the rack. Since the pinion is engaged with the rack, the traveling carriage is caused to travel along the rail, and the engagement of the pinion with the rack is released so that the traveling carriage can be moved regardless of the rotation of the pinion. It can be moved along the rail.

  For this reason, when the traveling carriage is caused to travel along the rails and the desired welding is completed, when the traveling carriage is returned to the initial position, by disengaging the pinion from the rack and moving it along the rails. The work of returning to the initial position can be easily performed.

It is a perspective view explaining the whole structure of a welding device. It is a perspective view of the welding apparatus seen from the opposite side of FIG. It is a front view of a welding device. It is a left side view of a welding device. It is a top view of a welding device.

  The welding apparatus according to the present invention will be described below. In the welding apparatus according to the present invention, the surface of one welded material 1 arranged at a substantially right angle shown in FIG. 1 is used as a running surface 1a, and the surface of the other welded material 2 is used as a guide surface 2a. While traveling along the traveling surface 1a while being guided, welding is performed on the corners 3 of the materials to be welded 1 and 2. However, it is not always necessary to perform only fillet welding, and it is also possible to perform welding at a butt portion where another material to be welded 1 or 2 is further abutted.

  In the present invention, the welding device does not limit the mechanism for traveling on the traveling surface 1a, and the traveling surface 1a may be configured so that the wheels can travel by directly contacting the traveling surface 1a. It may be configured such that the vehicle can travel without traveling directly on the traveling surface 1a by traveling on rails arranged on the traveling surface 1a.

  For example, when the welding device is configured to be capable of traveling by directly contacting the wheels with the traveling surface 1a, it may be configured by adopting the trolley body having a plurality of wheels described in Patent Document 1 described above. preferable. Then, a sliding member (12) as described later is arranged on the bogie body without providing guide rollers before and after the bogie body, and the contact member (13) is provided at the tip of the sliding member (12). The welding apparatus (A) can be configured by providing the torch holder (15) that supports the welding torch (14) at a predetermined position.

  In the present embodiment, the materials to be welded 1 and 2 are arranged in an upright state so as to be substantially orthogonal to each other, and the corner portions 3 are arranged in the vertical direction and arranged at substantially right angles. Then, the welding device A is configured to perform upward welding in which the corner portion 3 is welded from the lower side to the upper side. In addition, the traveling carriage 11 is configured to be able to travel without directly contacting the traveling surface 1a. Hereinafter, the configuration of the welding apparatus A according to this embodiment will be described with reference to the drawings.

  The welding apparatus A shown in FIGS. 1 to 5 has a traveling carriage 11 that travels along a rail 10 (direction of arrows a and b) arranged on the traveling surface 1a of one workpiece 1. The traveling carriage 11 is provided with a sliding member 12 that slides in a direction (arrow c, d direction) toward or away from the guide surface 2a of the other welded material 2. An abutting member 13 that abuts the guide surface 2a is arranged at the tip of the sliding member 12, and a torch holder 15 that supports the welding torch 14 is arranged at a predetermined position. The contact member 13 is urged in a direction to bring it into contact with the guide surface 2a.

  The rail 10 has a plate-shaped rail body 10a, and the surface 10b of the rail body 10a (when the rail 10 is installed on the traveling surface 1a, the surface opposite to the surface facing the traveling surface 1a, the same applies hereinafter). A rack 20b is attached over the entire length. A reinforcing member 10d made of channel steel is fixed over the entire length on the back surface 10c of the rail 10 (a surface facing the traveling surface 1a when the rail 10 is installed on the traveling surface 1a, the same applies hereinafter). Further, on both sides in the width direction of the rail body 10a, rail portions 10e are formed in a tapered shape on both front and back surfaces.

  The traveling carriage 11 has a plate-shaped carriage main body 11a, and a sliding member 12 and a motor 20 having a pinion 20a meshing with a rack 20b mounted on the rail 10 are movably arranged on the front surface 11b side. There is. Further, on the back surface 11c, a plurality of (four in this embodiment) rollers 11d are arranged so as to sandwich the rail portions 10e formed at both ends of the rail body 10a in the width direction. Therefore, the traveling carriage 11 can travel along the rail 10 by sandwiching the rail portion 10e of the rail body 10a by the rollers 11d of the carriage body 11a.

  A guide member 22 for linear movement is arranged on the surface 11b of the carriage body 11a in a direction (arrow c, d direction) substantially orthogonal to the installation direction (arrow a, b direction) of the rack 20b provided on the rail 10. The sliding member 12 is attached to the guide member 22. The sliding member 12 has a fixed piece 12 a and a standing piece 12 b standing upright from the fixed piece 12 a, and the fixed piece 12 a is fixed to the guide member 22.

  Further, an adjusting screw 12d is arranged on the upright piece 12b in a direction orthogonal to the surface 11b of the carriage body 11a, and is arranged in a direction (arrow c, d direction) orthogonal to the adjusting screw 12d. An adjusting screw 12e is arranged so as to be separated or approaching the trolley body 11a in accordance with the operation of the screw 12d. The torch holder 15 is attached to the adjusting screw 12e. Therefore, the position of the torch holder 15 with respect to the carriage main body 11a can be adjusted by operating the adjusting screws 12d and 12e.

  Further, an arm 12c is provided so as to project from the sliding member 12 along the rail 10 in one direction (direction of arrow b), and an abutting member 13 is arranged at the tip of the arm 12c. The sliding member 12 is urged by a sliding member urging member 16 in a direction in which the contact member 13 arranged at the tip of the arm 12c is in pressure contact with the guide surface 2a (direction of arrow c in this embodiment). .. The structure of the sliding member urging member 16 is not particularly limited, and a tension spring, a compression spring, an air cylinder or the like having an urging function can be used.

  In this embodiment, a tension spring is used as the sliding member urging member 16. Therefore, hooks are formed on the sliding member 12 and the carriage main body 11a of the traveling carriage 11, and the sliding member urging member 16 is stretched between these hooks to move the sliding member 12 to the arrow c. It is configured so that it can be biased in the direction.

  The torch holder 15 adjusts and holds the welding torch 14 in an optimum posture with respect to a target welding site. The torch holder 15 has a fixing portion 15a attached to the adjusting screw 12e, and a holding portion 15b configured to be rotatable and movable in and out of the fixing portion 15a to hold the welding torch 14. It is configured.

  Therefore, the holding portion 15b holding the welding torch 14 is rotated to an angle required for fixing the holding portion 15a to the fixing portion 15a, and the adjusting screws 12d and 12e are operated to cause the arrow c, the direction of d and the carriage body 11a. It is possible to adjust the size in the direction of separation or approach. By operating in this way, it is possible to adjust and hold the posture including the angle and the separation distance of the welding torch 14 with respect to the target welding site in an optimum state.

  The arm 12c has a function of holding the contact member 13 arranged at the tip. Then, when performing the welding operation, by maintaining the contact member 13 in contact with the guide surface 2a, it is possible to maintain the positional relationship between the welding torch 14 and the target welding site. Since the contact member 13 moves while holding the contact with the guide surface 2a during welding, it is preferable that the contact member 13 has a small resistance when moving. As such a contact member 13, a rotatable roller or a block-shaped member having a small friction coefficient can be used.

  In this embodiment, the contact member 13 is constituted by a roller rotatably attached to the tip of the arm 12c. A cover 13a is provided around the contact member 13, and the cover 13a is configured to avoid the influence of heat generated by the welding torch 14 during welding.

  As described above, the attitude of the welding torch 14 can be adjusted by rotating the holding portion 15b that constitutes the torch holder 15 and operating the adjusting screws 12d and 12e that constitute the sliding member 12. Therefore, the movement limit of the traveling carriage 11 in the direction of the arrow b along the rail 10 is ensured by adjusting the posture of the welding torch 14 with respect to the end of the target welding site (for example, the corner 3). It is set at a position where welding can be performed.

  Therefore, although the shape of the arm 12c is not limited, the arm 12c has a shape that does not hinder the welding by the welding torch 14 to the target welding site. That is, the arm 12c has a shape in which a rod-shaped member is bent so as to avoid the influence of heat by the welding torch 14 during welding as much as possible. Then, in the arm 12c, when the traveling carriage 11 reaches the movement limit in the direction of the arrow b, the position of the tip end portion of the welding torch 14 and the position of the contact member 13 substantially overlap with each other in a side view shown in FIG. The shape and dimensions are set so as to be separated from each other in the plan view shown in FIG.

  In the sliding member 12 configured as described above, the torch holder 15 and the arm 12c are both arranged on the sliding member 12, and the torch holder 15 is moved from the sliding member 12 according to the operation of the adjusting screws 12d and 12e. The arm 12c is fixed to the sliding member 12 although the entrance/exit dimensions can be adjusted. Therefore, when welding is performed by adjusting the posture of the welding torch 14 with the contact member 13 in contact with the guide surface 2a, for example, the welding torch 14 and the contact member 13 are positioned relative to each other. It is possible to move in the directions of arrows c and d at the same time without changing.

  Further, since the sliding member 12 is biased by the sliding member biasing member 16 in the direction of arrow c, the contact member 13 is always in pressure contact with the guide surface 2a. Therefore, when the rail 10 is installed on the traveling surface 1a, the welding torch 14 can be guided along the guide surface 2a even if the rail 10 is not parallel to the guide surface 2a. That is, even when the traveling carriage 11 moves away from or approaches the guide surface 2a as it travels along the rails 10, the welding torch is maintained by keeping the contact member 13 in pressure contact with the guide surface 2a. 14 can maintain the positional relationship with the contact member 13.

  Therefore, when the traveling carriage 11 travels along the rail 10 when welding the materials 1 and 2 to be welded, the welding torch is irrespective of whether the rail 10 is installed parallel to the guide surface 2a. It is possible to move 14 in parallel along the guide surface 2a.

  A guide member 23 for linear movement of the motor 20 is arranged in parallel to the guide member 22 for the sliding member 12 on the surface 11b of the traveling carriage 11. A motor base 20c is attached to the guide member 23, and the motor 20 is fixed to the motor base 20c. Further, a hole 11e is formed at a position corresponding to the motor base 20c in the carriage body 11a of the traveling carriage 11 so as to penetrate the shaft of the motor 20 and allow the shaft to move with the movement of the motor 20. ing.

  As described above, the motor 20 is configured to be movable in the directions of the arrows c and d, the pinion 20a is meshed with the rack 20b along with the movement in the direction of the arrow d, and along with the movement in the direction of the arrow c. It is possible to release the meshing of the pinion 20a with the rack 20b. However, in this embodiment, the motor 20 is normally urged by the pinion urging member 21 in the direction of arrow d, and the pinion 20a is kept meshed with the rack 20b.

  The pinion urging member 21 may be any member that can urge the pinion 20a to the rack 20b, but in the present embodiment, a tension spring is used as in the sliding member urging member 16 of the sliding member 12. I am using. Therefore, hooks are formed on the motor base 20c and the carriage main body 11a, respectively, and a tension spring is stretched between these hooks to urge the motor base 20c in the direction of arrow d.

  Further, the bar 24 is erected at a position separated from the motor 20 by a predetermined dimension in the carriage main body 11a of the traveling carriage 11. The bar 24 is used by an operator when moving the motor 20 in the direction of arrow c when releasing the engagement of the pinion 20a with the rack 20b. Therefore, the bar 24 is arranged, for example, at such a position that the bar 20 can be supported by hand, the motor 20 can be supported, and the motor 20 can be easily pulled toward the bar 24. In this embodiment, the size is set so that the worker can pull the motor 20 toward the bar 24 with only his right hand.

  As described above, by disposing the bar 24 near the motor 20, the pinion can be operated by a simple operation of moving the motor 20 together with the motor base 20c to the bar 24 side against the urging force of the pinion urging member 21. It is possible to release the engagement of 20a with the rack 20b. Therefore, it is possible to easily perform the work of moving the traveling carriage 11 from the welding end position to the retracted position or returning it to the initial position after the welding work on the target welding portion is completed.

  The welding apparatus A according to the present embodiment is installed in a state where the rail 10 is erected along the traveling surface 1a of the material 1 to be welded, and the traveling carriage 11 travels along the rail 10 to perform upward welding. Is configured to do. Therefore, the welding torch 14 and the motor 20 arranged on the traveling carriage 11 project in a cantilever manner, and it is necessary to secure the stability of the posture of the welding apparatus A.

  For this reason, a support member 25 for supporting the welding apparatus A in a stable state is provided on one end side (the lower end side in the direction of the arrow b) of the rail 10. The supporting member 25 may be any member that can stably support the entire welding apparatus A, but must not interfere with the movement of the welding torch 14 when performing welding. Therefore, the structure and shape of the support member 25 are not limited as long as the stability of the welding apparatus A is realized and the work by the welding torch 14 is not hindered.

  In the present embodiment, the supporting member 25 is formed in an L shape in a front view as shown in FIG. 3, and has a fixing piece 25a fixed to the reinforcing member 10d fixed to the rear surface 10c of the rail 10. , And a support piece 25b formed in a direction orthogonal to the fixed piece 25a. In particular, the support piece 25b has a size sufficiently larger than the size from the rail 10 of the center of gravity of the traveling carriage 11 on which the welding torch 14 and the motor 20 are mounted.

  The supporting member 25 is attached to the traveling surface 1a of the workpiece 1 by the fixing piece 25a so that the welding device A itself can be maintained in a stable state even when the traveling vehicle 11 travels upward along the rail 10. In order to do so, a plurality of suction members 26 are provided. The adsorbing member 26 may be any member as long as it can be stably adsorbed to the traveling surface 1a, and the structure thereof is not limited. For example, when the materials to be welded 1 and 2 are steel materials, a magnet can be used as the attraction member 26. When the materials to be welded 1 and 2 are materials such as stainless steel and aluminum that cannot be adsorbed by a magnet, an adsorbing cup that adsorbs using a vacuum can be used as the adsorbing member 26.

  A handle 27 is arranged at the other end of the rail 10 (upper end in the direction of arrow a). The handle 27 is for a worker to hold when moving the welding apparatus A.

  A switch 30a is arranged at the end of the carriage main body 11a of the traveling carriage 11 in the arrow a direction, and a switch 30b is also arranged at the end thereof in the arrow b direction. The respective switches 30a and 30b detect the traveling limit of the traveling carriage 11. The switch 30a contacts the stopper 20d arranged in the direction of the arrow a of the rack 20b to generate a signal reaching the upper limit, and the switch 30b contacts the installation surface of the support member 25 to generate a signal reaching the lower limit. ..

  In particular, the stopper 20d is configured so that it can be fixed at a desired position on the rack 20b. Therefore, by fixing the stopper 20d to the rack 20b so as to correspond to the position where the welding torch 14 reaches the upper end portion of the target welded portion, it is possible to set the rising limit of the traveling carriage 11.

  Reference numeral 31 denotes an operation panel arranged on the bogie main body 11a of the traveling carriage 11. By operating switches provided on the operation panel 31, the traveling speed of the traveling carriage 11 and the welding mode are set. Is possible. Further, it is possible to recognize that the traveling carriage 11 has reached the upper limit or the lower limit based on the signals from the switches 30a and 30b, and based on these signals, stop the traveling carriage 11 and stop welding. ..

  A procedure for welding the corners 3 of the materials 1 and 2 to be welded, which are arranged substantially at a right angle as shown in FIG. 1 by the welding apparatus A configured as described above, will be briefly described. First, the handle 27 is gripped and the welding apparatus A is conveyed to the vicinity of the corner 3 which is the target welding site, and the support member 25 is brought into contact with the support surface to bring the contact member 13 into contact with the guide surface 2a. Then, while maintaining the contact state of the contact member 13 with the guide surface 2a, the position of the rail 10 is adjusted so that the sliding member 12 is positioned substantially in the middle of the sliding range in the directions of the arrows c and d, and the suction is performed. The welding device A is fixed by adsorbing the welding device A to the traveling surface 1a by the member 26.

  After fixing the welding device A, the adjusting screws 12d and 12e and the holding portion 15b are operated to set the welding torch 14 to a posture suitable for welding the corner portion 3. At this time, since the contact member 13 maintains the contact state with the guide surface 2a, the positional relationship between the contact member 13 and the welding torch 14 is set. Further, the position of the stopper 20d is adjusted so as to correspond to the upper end portion of the welding with respect to the corner portion 3 and is fixed to the rack 20b.

  Then, by pulling the motor 20 toward the bar 24, the engagement of the pinion 20a with the rack 20b is released, the traveling carriage 11 is lowered, and the welding torch 14 is opposed to the lower end portion of the corner 3 which is the welding start position. At this position, the pinion 20a is engaged with the rack 20b, the switches of the operation panel 31 are operated, welding of the corner portion 3 by the welding torch 14 is started, and the traveling carriage 11 travels in the direction of arrow a at a predetermined welding speed. (Rise)

  Welding of the corner 3 by the welding torch 14 progresses while the traveling carriage 11 travels. Then, when the switch 30a comes into contact with the stopper 20d due to the rise of the traveling carriage 11, a signal indicating that the traveling carriage 11 has reached the upper limit is generated from the switch 30a. This signal is transmitted to the control panel 31, and based on this signal, the welding torch 14 stops operating and the traveling carriage 11 stops traveling.

  As described above, the welding to the corner portion 3 is completed. After that, the worker releases the meshing of the pinion 20a with the rack 20b and lowers the traveling carriage 11, and meshes the pinion 20a with the rack 20b at a position that does not hinder the transportation of the welding apparatus A and holds the position. Then, the suction of the traveling surface 1a by the suction member 26 is released, and the handle 27 is gripped and transported to the next welding site.

  By performing the series of operations described above, it is possible to perform the intended welding. Then, when the welding device A is transported to the next welding site and new welding is performed, if the positional relationship between the abutting member 13 and the welding torch 14 is the same at the corner under the same conditions as the welding already performed, It is possible to perform welding immediately without the need for adjusting again.

  When butt-welding another welded material to the end of the welded material 2, the torch holder 15 is operated to adjust the attitude of the welding torch 14 so as to be substantially perpendicular to the guide surface 2a. Good.

  The welding apparatus A according to the present invention is not necessarily applied only to the upward welding, and can be used even when the target welding site exists in the horizontal plane.

A Welding device 1, 2 Welding material 1a Running surface 2a Guide surface 3 Corner 10 Rail 10a Rail body 10b Front surface 10c Rear surface 10d Reinforcing member 10e Rail portion 11 Traveling carriage 11a Truck body 11b Surface 11c Rear surface 11d Roller 11e Hole 12 Sliding Member 12a Fixed piece 12b Standing piece 12c Arm 12d, 12e Adjustment screw 13 Contact member 13a Cover 14 Welding torch 15 Torch holder 15a Fixed part 15b Holding part 16 Sliding member biasing member 20 Motor 20a Pinion 20b Rack 20c Motor base 20d Stopper 21 Pinion Energizing Member 22, 23 Guide Member 24 Bar 25 Supporting Member 25a Fixed Piece 25b Supporting Piece 26 Adsorption Member 27 Handle 30a, 30b Switch 31 Operation Panel

Claims (1)

The intersection of the materials to be welded arranged at a substantially right angle is arranged in a direction substantially perpendicular to the horizontal plane, and one of the materials to be welded is the traveling surface on which the traveling carriage travels, and the other material to be welded is A welding device for welding the intersection of the material to be welded as a guide surface of the welding torch,
A rail provided on one of the materials to be welded having a rack and a traveling surface,
A motor base configured to be movable in a direction of approaching or separating from the rack of the rail, and disengagement when the motor base is engaged with or separated from the rack when approaching the rack. A pinion, a motor having the pinion and fixed to the motor base, a pinion urging member for urging the pinion toward the rack, and a bar arranged at a predetermined distance from the motor base. Having a traveling carriage that travels substantially straight along the rails,
A sliding member that is arranged from the traveling carriage toward the other material to be welded, and is configured to be slidable in a direction away from or approaching a guide surface of the material to be welded,
An abutting member arranged at the tip of the sliding member and abutting the guide surface;
A torch holder arranged at a predetermined position of the sliding member, for holding a welding torch for welding a material to be welded;
A sliding member biasing member that biases the sliding member so as to press the contact member arranged at the tip of the sliding member against the guide surface,
The motor base is configured to be movable in a direction away from or closer to the bar, and when the motor base is separated from the bar, the pinion meshes with a rack and the pinion is rotated according to the rotation of the pinion. A structure in which the traveling carriage is caused to travel along the rail, or when the pinion is disengaged from the rack when approaching the bar, the traveling carriage is moved along the rail regardless of the rotation of the pinion. Welding equipment characterized by being

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