JPH071133A - Welding equipment - Google Patents

Abstract

PURPOSE:To make a welding equipment lightly movable and to simultaneously perform a plurality of welding by installing a welding equipment for a prescribed welding line in a short time in the case of welding a fillet welding joint constituted of a horizontal face and a vertical face. CONSTITUTION:A welding machine consisting of a rail 8 having a distance keeping leg 7 and a setting jig 16, and a welding truck, as well as a welding equipment provided with a hanging means 18 having an upward energizing force to this equipment are arranged in the longitudinal direction of a material to be welded. Thus, the equipment, can be set in a short time and a multipoint simultaneous weldings are enabled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding method and apparatus for automatically welding a welding line of a workpiece held so that the welding surface is horizontal in a downward position.

[0002]

2. Description of the Related Art As a method of automatically welding a welding line of a steel structure, an automatic traveling welding carriage having a welding torch mounted on a traveling carriage is used as a hypothetical guide rail provided along the welding line or on one of the base materials. The method of performing automatic welding by guiding and traveling is the most widespread method.Automatic traveling Welding carriage is guided by one of the temporary guide rails provided along the welding line or one of the base materials to run and automatically welds. Although the method of performing is the most popular method, in general, the automatic traveling welding carriage is larger than the welding torch, and the structural members, for example, the flange and the reinforcing material, intersect at the welding line of the structure to be welded,
In some cases, the welding carriage may be stuck to these structural members and cannot be automatically welded, or a traveling surface sufficient to support the welding carriage may not be obtained. Further, the device is heavy and it is difficult to accurately install the device in accordance with the welding line.
Furthermore, an individual welding amount is small and a device requiring a long setup time is economically difficult to employ, and has been left unattended for automation.

[0003]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of automatic welding by an automatic traveling welding carriage which has been widely adopted for automatic welding of steel structures in the related art, the present invention welds by a structural member which intersects a welding line. Automatic welding method that does not need to change the height and posture of the welding torch even if it is disturbed or even in a narrow area, and the welding means and welding equipment for performing this are installed easily and in a short time without labor. This is an issue.

[0004]

A welding method of the present invention for solving the above-mentioned problems is to provide a welding line above a welding surface parallel to a welding line on the welding surface while keeping a constant distance from the welding surface. The welding torch is guided and moved to, and the welding line is welded by a welding torch supported by the welding cart so that the welding point is located below the welding cart with the certain distance.

In order to carry out this welding method, the welding apparatus of the present invention is a distance-maintaining leg for supporting a rail on the welding surface at a constant height, a vertical surface of a welding target material constituting a welding line and a rail (or The guide rail was set parallel to the welding line by a set jig that set the distance between the distance-holding legs) constant, and the guide rail was run along the guide rail, and was supported so that the welding point came down a certain distance. Welding trolley having a welding torch, means for moving the welding trolley along a guide rail, hoisting with an upward biasing force slightly above its own weight so that the above device can be easily moved and installed in the welded portion Characterized by having means

[0006]

According to the present invention described above, since the welding carriage that supports the welding torch is guided and moved in parallel with the welding line above the welding surface while keeping a constant distance from the welding surface, Only the tip portion of the welding torch moves, and the structural member intersecting the welding line does not hinder the welding, and the entire welding line can be automatically welded.

The welding carriage has a guide rail for horizontally guiding the welding carriage, a lifting means for moving the guide rail in a vertical direction, and a lifting rail for moving the lifting means in a direction orthogonal to the extending direction of the guide rail in a horizontal plane. It can be moved to any position.

Since the apparatus is hoisted in the air by hoisting means having an upward biasing force, it can be manually moved up and down and moved easily, and can be easily installed at the welding position. At the time of installation, fix the device parallel to the welding plane with the distance-fixing legs attached to the guide rails,
The device can be installed in parallel with the welding line by a single movement by a separately provided set jig.

A plurality of the above-mentioned welding devices are provided on a rail extending in a straight line so that the above-mentioned horizontal guide rails are movable so as to be orthogonal thereto, and the longitudinal direction of the structure is the extension direction of the rails. By installing them in parallel, it is possible to obtain a multi-point simultaneous welding apparatus capable of simultaneously welding a plurality of welding lines orthogonal to the longitudinal direction of the structure.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

1 and 2 are views showing an embodiment of a welding apparatus of the present invention. FIG. 1 is a state during welding and FIG. 2 is a state in which it is not in operation. In the figure, as an example of the material to be welded, an H-section structure that is often used in iron structures is selected. The H-section structure is composed of a web 1 serving as a welding surface, a flange 2, and a reinforcing material or a bracket 3, and the welding device of the present invention is intended for the reinforcing material or the bracket 3 here.
And fillet welding 4 between both sides of the web 1 and the web 1. With regard to this welding, in the conventional method in which the welding carriage is directly placed on the web 1, the reinforcing material 3 is used as a guide, and the welding is performed by the welding torch fixed to the welding carriage, when the end of the welding line 4 is approached, The welding carriage could not be held by the flange 2 and advanced, and full-line automatic welding could not be performed.
The reinforcing material or bracket which is the material to be welded in 3 is an example in which the former is lower than the flange, and the latter is protruding from the flange and it is difficult to cross the welding target material with two welding torches. It is the one listed.

In the welding apparatus of this embodiment, the welding carriage 6 supporting the welding torch 5 does not run on the web surface 1 which is the welding surface, but rather on the web surface 1 above the flange 2 and on the distance maintaining legs. It is configured to be movable along a guide rail 8 supported by 7, and has a structure in which the movement of the carriage 5 is not hindered by an obstacle such as the flange 2.

The trolley is driven by an electric motor, a speed reducer and a driving force transmission system. In the present embodiment, which uses a known screw and nut method, a rack and pinion method or the like to change the rotation into a linear motion, a rack and pinion method is adopted. The rack 1 fixed to the guide rail 8 and the pinion of the output shaft of the electric motor 9 and the speed reducer 10 capable of variable speed and forward / reverse rotation.
1, and the welding carriage 6 is moved forward and backward at a predetermined speed by rotating the electric motor.

The torch holding mechanism 12 transmits the movement of the welding carriage 6 to the welding torch 5 and adjusts the torch height, angle, and right and left with respect to the welding line 4.

In the case of welding to the reinforcing material 3 of FIG. 1, when the reinforcing material is short, it is possible to simultaneously weld the welding lines 4 on both sides in such a manner that the two welding torches 5 straddle the material to be welded. At that time, the welding torch 5 and the torch holding mechanism 1
2. The load of the cooling water welding wire and the supply line 13 for the molten material such as the inert gas is shared, the height of the welding torch 5 is prevented from changing, and the supporting column 14 of the welding torch having the roller or the ballpoint pen at the tip is used. It is desirable to stabilize the device.

Next, referring to FIGS. 1 and 2, the difference between during welding and during welding preparation is shown by an embodiment in which reference numeral 15 is a magnet attached to the distance holding leg 7 of the rail, and the welding carriage is moved during welding. The equipment is designed to prevent the equipment from tipping over due to an unbalanced load. 16 is a set jig for placing the guide rail 8 parallel to the welding line when the equipment is installed at the welding point, and the welding torch is operated during welding. Evacuate without disturbing. The rail fixed magnet 15 may be incorporated in the component of the contact surface with the welding surface of the distance maintaining leg 7.

The welding device suspends the carriage 6 or the rail 8 with a hanging tool 18 such as a wire or a rod, and puts the entire weight of the device on the welding surface 1 during welding to keep the device stable, and a balancer 19 during welding preparation. While pulling up,
The upward bias prevents the device from falling and stops it at an arbitrary height. When the device is installed in the welded part, the space is floated by the slight force of the difference between the self-weight and the balancer and the guide rail 8 is held while being applied to the rail set jig 16 and the welding target material 3. Land on welding surface 1 with legs 7.

FIG. 3 shows a guide rail 8 in preparation for welding.
Is an example of means for installing in parallel to the welding line 4, 16 is a rail set jig, which is fixed to the rail distance-measuring legs 7 by a hinge 17,
When the rail is installed, it is laid down to hit the material 3 to be welded, and at the time of welding, it is flipped up to be along the distance-measuring legs 7 so as not to interfere with the welding.

As an example of the object to be welded, H shown in FIGS. 1 and 2 is used.
When there are many welding points scattered at intervals in the longitudinal direction, such as welding of reinforcements for beam structures such as cross-section construction and bridge garters, many welding devices are arranged in the longitudinal direction to perform welding at the same time. By doing so, a great effect can be obtained in saving labor and shortening the processing time. FIG. 4 is a diagram showing an example of a multi-point simultaneous welding apparatus that simultaneously performs fillet welding of a plurality of welding target materials 3 of the H-section structure and the web 1.

Reference numeral 20 denotes a welding machine indicated by symbols 5 to 17 in FIGS. 1 to 3, which is hung via a suspending tool 18 and a balancer 19. Reference numeral 21 denotes an object to be welded which is moved between processes by a carrier truck 22 which travels on a carrier rail 23. The welding machine 20 hangs by a suspending tool 18 and a balancer 19 on a transport suspension carriage 25 of a welding device that travels on a welding device moving rail 24 that is parallel to the transport rail 23 of the workpiece. In order to perform simultaneous multi-point welding, a plurality of welding device suspension carts are mounted on the rail 24. 26 is a welding wire feeder which is a welding material supply terminal provided on the suspension truck 25 of the welding machine, 27 is a welding power source installed on the ground, a supply line for inert shielding gas, water, a cable such as a control cable, Shows hoses. According to the welding line of the work piece 21, the welding device 20 is moved by the carrier 25 of the welding device, the welding device is installed on the welding line, and the welding is started by the operation panel on the truck, and the welding is completed automatically. Stop. Sequential welding of a large number of welding devices is started to enable multi-unit holding welding.

In accordance with the welding line of the work piece 21, the welding device 20 is moved by the carriage 25 of the welding device, the welding device is installed on the welding line, and welding is started by the operation panel on the trolley. Completion stops automatically. Sequential welding of a large number of welding devices is started to enable multi-unit holding welding.

As described above, in the embodiment shown in FIG. 4, the welding device 20 is hung and moved on the column 28 standing on the carriage 25 running on the rail 24 laid on the ground, but the welding device is not necessarily moved. It is not limited to a cart that travels on the ground, but may be moved by a suspension rail supported by a ceiling girder or a pillar.

In FIG. 5, the welding machine 20 is mounted on the suspension rail 29 provided immediately above the welding process, and the suspender 18 and the balancer 19 are provided.
It is hung from a suspension carriage 30 via a wire carrier 26, and the carriage 30 is provided with a wire feeder 26 which is a molten material supply terminal. In this way, suspending the welding device from the ceiling simplifies the arrangement of equipment on the ground, and facilitates transportation of machines and movement of workers.

In the embodiments shown in FIGS. 4 and 5, respectively, the carrying direction of the work piece is aligned with the longitudinal direction of the work piece, but the carrying direction of the work piece is not limited to this. It does not matter even if the direction is perpendicular to the longitudinal direction. Particularly, the embodiment shown in FIG. 5 is suitable for conveying the workpiece in the width direction.

[0025]

As described above, according to the present invention, since the welding carriage is moved on the guide rail installed at a position higher than the welding plane by the distance maintaining leg, the peripheral shape of the welded portion does not hinder the traveling of the welding carriage. . In addition, when installing the welding equipment at the welding part, the equipment floated in the air is pulled down with a slight force by the balancer, and positioning can be done in one operation with the distance-measuring legs integrated with the rail and the set jig, so the welding setup Work can be done in a short time, and by starting welding one after another, it is possible to reduce the production time (lead time) of the process by performing welding of a large number of units at the same time. Make a contribution.

[Brief description of drawings]

FIG. 1 is a perspective view of a welding apparatus according to an embodiment of the present invention during welding.

FIG. 2 is a perspective view of the welding apparatus of the present invention during welding preparation.

FIG. 3 is an example of a set jig for placing the welding device in parallel with a welding line by applying the welding device to an object to be welded.

FIG. 4 is a perspective view showing an example of a multipoint simultaneous welding apparatus using a plurality of the welding apparatuses.

FIG. 5 is a perspective view of another embodiment of a multipoint simultaneous welding apparatus using a plurality of the welding apparatuses.

[Explanation of symbols]

 1 Web to be a welding plane 2 Flange to be an obstacle to welding 3 Material to be welded (reinforcement or bracket) 4 Welding line 5 Welding torch 6 Welding trolley 7 Rail distance maintaining leg 8 Guide rail of welding trolley 9 Electric motor 10 Reducer 11 Rack 12 Torch holding mechanism 13 Melt material supply line 14 Support column 15 Magnet 16 Rail set jig 17 Rail set jig hinge 18 Lifting device 19 Balancer 20 Welder 21 Welding object 22 The above-mentioned carrier truck 23 The above-mentioned carrier rail 24 Welding device Moving rail 25 Welding device suspension truck 26 Welding wire feeder 27 Cables and hoses 28 Struts 29 Suspension rail 30 Suspension truck

Claims (2)

[Claims] 1. A welding apparatus for automatically welding a welding line of an object to be welded held in a horizontal position such that the welding surface is kept horizontal, in a welding apparatus for determining a distance to a vertical surface of a distance maintaining leg and a material to be welded. A guide rail extending above the welding surface in a straight line parallel to the welding line of the workpiece, an elevating means for moving the guide rail in the vertical direction, and an elevating means for extending the guide rail and a horizontal plane. A welding carriage having means for moving in a direction orthogonal to each other, a welding torch traveling along the guide rail, and a welding torch supported so that a welding point is located at a certain distance below the welding rail; A welding device comprising moving means for moving along the welding device and a welding device provided with a hoisting means having an upward biasing force exceeding a downward force due to its own weight in the molten material supply line. 2. A plurality of welding devices according to claim 2 are movably provided on a rail extending in a straight line in a direction orthogonal to the horizontal guide rails of these welding devices, and the longitudinal direction thereof is A multi-point simultaneous welding device capable of simultaneously welding a plurality of welding lines in the longitudinal direction of an object to be welded, which are installed parallel to the rail extending direction.