JPH06335772A - Automatic welding equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to an automatic welding apparatus and sets the optimum welding torch position and inclination angle according to the relative angle between a horizontal plate member and a vertical plate member. [Structure] A trolley 4 which is horizontally driven, and a slide means 5 which linearly moves a slider 6 in the traveling direction.
A welding torch 7 mounted on the slider 6, mounting adjustment means 8 for adjusting the mounting position of the slider 6 on the slider 6, and guide means 10 for causing the carriage 4 to travel along the vertical plate member B. The adjusting means 8 includes a tilt shaft 19 attached to the slider 6 in a tilted state, a swing arm 20 swingably mounted around the tilt shaft 19, and a welding torch 7 attached to the swing arm 20 so as to be adjustable in angle along the tilt shaft 19. The welding torch 7 is provided with a torch holder 16 which can be held in the fitted state and can be fixed at any position in the fitting direction, and the welding torch 7 is moved along the welding line to arrange the welding torch 7 in an optimum posture. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic welding apparatus for performing fillet welding at a contact portion between a horizontal plate member arranged in a horizontal state and a vertical plate member arranged on the upper surface thereof.

[0002]

2. Description of the Related Art A contact portion between a horizontal plate member arranged in a horizontal state and a vertical plate member arranged on an upper surface of the horizontal plate member is linearly formed. For this reason, fillet welding at the relevant contact portion can be carried out by mounting a welding torch on a carriage that linearly moves along the longitudinal direction of the relevant contact portion and performing welding while moving the carriage. is there. Moreover, if such a welding device is used, automation by unmanned operation can be easily achieved.

[0003]

By the way, in many cases, the horizontal plate member and the vertical plate member are joined so as to be orthogonal to each other.
In this case, if the angle of the welding torch is fixed at, for example, an intermediate position between both plate members, that is, an angle of about 45 °, sufficiently good welding can be performed. Therefore, in such fillet welding, it was not necessary to provide an adjusting mechanism for arbitrarily adjusting the angle of the welding torch.
However, for example, in a liquefied gas tank, in a welded structure formed in conformity with the shape of a ship, there is a need to join the horizontal plate member and the vertical plate member at relative angles that are not orthogonal to each other. In such a case, it may be necessary to place a welding torch between the plate members formed at an acute angle to carry out fillet welding, while avoiding contact between the plate members and the welding torch. It would be convenient if the welding torch can be set at an arbitrary angle according to the relative angle of both plate members.

The present invention has been made in view of the above-mentioned circumstances, and is capable of automatically setting the optimum welding torch position and inclination angle according to the relative angle between the horizontal plate member and the vertical plate member. It is intended to provide a welding device.

[0005]

In order to achieve the above-mentioned object, the present invention is mounted on a carriage which is horizontally driven, and a slide means for linearly moving a slider in the traveling direction of the carriage and the slider. A welding torch, a mounting adjustment means for adjusting a mounting position and an angle of the welding torch on a slider, and a guide means for causing the carriage to travel along the vertical plate member. A tilt shaft attached to the slider in a tilted state in the direction of the vertical plate member, a swing arm mounted so as to be rotatable around the tilt axis and fixed at an arbitrary swing angle position, and the swing arm along the tilt axis. Automatic welding apparatus equipped with a torch holder that is mounted so that the angle can be adjusted in any direction and that holds the welding torch in a fitted state and can be fixed at any position in the fitting direction. It has proposed.

[0006]

According to the automatic welding apparatus of the present invention, the approaching direction of the welding torch to the welding line is set by turning the turning arm around the tilt axis and fixing it at an arbitrary turning angle position. In this state, the tilt angle of the welding torch is set by rotating the torch holder.
Further, by moving the welding torch in the fitting direction to the torch holder, the proximity distance of the welding torch to the welding line is adjusted. In this state, by moving the carriage horizontally, the carriage is moved along the vertical plate member by the guide means, and the welding torch is operated during the movement, so that the fillet under good welding conditions. Welding will be performed. Further, in the fillet welding operation from the vicinity of the movement limit of the truck, the fillet welding can be continued under the same welding condition by operating the slide means with the truck stopped.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the automatic welding apparatus according to the present invention will be described below with reference to FIGS. In each of these drawings, reference numeral 1 is an automatic welding device, 2 is an apparatus main body,
3 is a moving mechanism, 4 is a carriage, 5 is a sliding means, 6 is a slider, 7 is a welding torch, 8 is an attachment adjusting means, 9 is a beam-shaped member, 10 is a guide roller, 11 is a wheel, 12 is a servomotor, 13 Is a guide rail, 14 is a ball screw, 15 is a nut, 16 is a torch holder, 17 is a holder attitude adjusting mechanism, 18 is a mounting shaft, 19 is a turning shaft, and 20 is a turning arm.

The automatic welding apparatus 1 of the present embodiment has a trolley 4 which is provided with a moving mechanism 3 for horizontally moving the apparatus main body 2 to the left and right, and the apparatus main body 2. The trolley 4 is driven by a slide means 5 housed inside.
6 which is linearly moved in the direction along the moving direction of
And a welding torch 7 mounted on the slider 6, and a mounting adjusting means 8 for adjusting the posture and mounting position of the welding torch 7.

On the front surface of the carriage 4, guide rollers 10 which are horizontally rotated are provided at the ends of beam-like members 9 which are arranged so as to project forward from both ends thereof. The guide roller 10 is provided on the surface of the vertical plate member A arranged in front of it.
By rolling both in contact with each other,
The distance between the carriage 4 and the vertical plate member A can be kept constant.

The moving mechanism 3 is provided with, for example, a plurality of wheels 11 arranged at a lower portion of the apparatus main body 2 and a servo motor 12 for driving one or a plurality of wheels 11 of the wheels 11. There is.

The slide means 5 is provided with a guide rail 13 and a ball screw 14 arranged along the left-right direction inside the apparatus main body 2, and a servomotor (not shown) for rotating the ball screw 14. A nut 15 screwed to the ball screw 14 is fixed to the slider 6 so that the slider 6 can be moved and arranged at an arbitrary position of the apparatus main body 2 by the operation of a servomotor.

The welding torch 7 is, for example, a welding torch 7 for MIG welding, and is formed in a substantially columnar shape, and is connected to a welding wire supply means and an inert gas supply means (not shown).

The attachment adjusting means 8 includes the welding torch 7.
A torch holder 16 for holding the torch holder 16 in a fitted state and a holder attitude adjusting mechanism 17 for adjusting the angle and direction of the torch holder 16 are provided.

The torch holder 16 is a member having a substantially U-shaped cross section with a space slightly larger than the outer diameter of the welding torch 7, and the welding torch 7 is fitted inside the torch holder 16. 7 can be moved in its longitudinal direction. Also, torch holder 1
6, a projecting piece 16b projecting in a direction of closing the opening 16a is disposed in the opening 16a.
A fixing bolt 16c is screwed into a screw hole passing through 6b. Then, by fastening the fixing bolt 16c, the welding torch 7 is sandwiched between its tip and the bottom surface of the torch holder 16, and the welding torch 7 can be fixed to the torch holder 16. Further, on one outer surface of the torch holder 16, a mounting shaft 18 to be mounted on a turning arm described later is arranged in a protruding state.

The holder attitude adjusting mechanism 17 is provided with a rotary shaft 19 fixed to the slider 6, a rotary shaft 19 rotatably attached to the rotary shaft 19, and the torch holder 1 at the tip thereof.
And a pivot arm 20 to which 6 is rotatably attached.

The swivel shaft 19 is fixed to the slider 6 in a state of being inclined toward the front of the carriage 2 by a certain angle from the vertical direction. Further, the revolving arm 20 is
A fitting hole 20a for fitting the swivel shaft 19 is provided at one end, and a mounting hole 20b for fitting the mounting shaft 18 of the torch holder 16 is provided at the other end. These fitting holes 20
The a and the mounting hole 20b are formed in directions orthogonal to each other, and the turning shaft 19 fitted therein is contracted by the fastening screw 20d to reduce the interval dimension of the notch 20c obtained by cutting a part thereof. Also, the mounting shaft 18 can be fixed.

In order to carry out fillet welding of the horizontal plate member B and the vertical plate member A by using the automatic welding device 1 thus constructed, first, both plate members A and B to be welded are to be welded. The device body 2 is fixed by temporary welding or clamps.
The carriage 4 is arranged at a position where the two guide rollers 10 provided on the vertical plate member B come into contact with each other. Then, the angle of the torch holder 16 is changed while turning the turning arm 20 around the turning shaft 19 with the fastening screw 20d loosened. Thereby, the direction and angle of the welding torch 7 are adjusted to the optimum state, and the turning screw 1 is fastened by fastening the fastening screw 20d.
9, the swing arm 20, and the torch holder 16 are integrally fixed. After that, by loosening the fixing bolt 16c and sliding the welding torch 7 in the torch holder 16,
With the tip of the welding torch 7 placed at an optimum position,
The welding torch 7 is fixed by fastening the fixing bolt 16c.

As a result, the welding torch 7 is set so as to realize optimum welding conditions for joining the horizontal plate member B and the vertical plate member A. In this case, according to the automatic welding apparatus 1 of the present embodiment, a combination of the turning operation of the turning arm 20, the swinging operation of the torch holder 16 and the sliding operation of the welding torch 7 in the torch holder 16 allows an arbitrary direction. , Welding torch 7 in angle and position
Can be arranged. Therefore, the operator can easily select and set the posture and the like of the welding torch 7 that can realize the optimum welding conditions according to the relative angle between the horizontal plate member B and the vertical plate member A, which is favorable. Welded joints can be obtained.

Further, since the revolving shaft 19 is disposed in a state of being tilted forward with respect to the vertical line, the revolving arm 2
It becomes possible to turn 0 along the welding line,
The desired direction, angle and position of the welding torch 7 can be realized by finely adjusting each part. As a result, there is an effect that the number of work steps required for setting the welding torch 7 can be reduced.

Then, by operating the moving mechanism 3 with the welding torch 7 set as described above, the guide roller 10 is caused to roll on the surface of the vertical plate member B, and the carriage 4 becomes a welding line. You will be guided along. As a result, the tip of the welding torch 7 is moved so as to follow the abutting portion of the plate members A and B, and the fillet welding is performed by unmanned operation. Further, when there is a movement limit of the carriage 4, that is, when there is an obstacle that obstructs the movement of the carriage 4, by operating the slide means 5 from the movement limit position, the welding torch 7 is placed on the apparatus main body 2. Can be moved to continue the fillet welding operation.

The automatic welding apparatus 1 of the present invention can employ the following techniques. Welding torch 7 is cylindrical and torch holder 16 is U
Although a member having a V-shaped cross section is used, a welding torch 7 having an arbitrary shape and a torch holder 16 that slidably holds the welding torch 7 are used instead of the member. The tilt angle of the swivel shaft 19, the length of the swivel arm 20, etc. are set to arbitrary values. The slide means 5 includes a ball screw 14 and a linear guide 1.
5 and a servo motor, the optional slide means 5 should be used instead. We decided to apply it to MIG welding, but instead of this,
Apply to any arc welding, etc.

[0022]

As described above in detail, the automatic welding apparatus according to the present invention has a carriage that is horizontally moved, and a slide means that linearly moves the slider in the running direction.
A welding torch mounted on the slider, mounting adjustment means for adjusting the mounting position and the like to the slider, and guide means for moving the carriage along the vertical plate member are provided, and the mounting adjustment means is tilted to the slider. Attached tilt axis, swivel arm that can be swiveled around it, and swivel arm that is adjustable in angle along the tilt axis and holds the welding torch in the fitted state and fixed at any position in the fitting direction Since it has a possible torch holder, the following effects are obtained. By rotating the swivel arm around the tilt axis, rotating the torch holder, and sliding the torch holder and welding torch, the welding torch can be placed at the desired position at any angle from any direction. The condition can be easily realized. Since the attitude of the welding torch can be adjusted,
The fillet welding operation by unmanned operation can be performed in correspondence with the vertical plate member and the horizontal plate member that are joined at an arbitrary relative angle. Since the tilt axis for attaching the swivel arm is arranged in a tilted state in the direction of the vertical plate member, the tip position of the welding torch rotated about the tilt axis can be moved along the abutting portion of both plate members. Therefore, the welding torch setting operation can be easily performed.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an automatic welding device according to the present invention.

FIG. 2 is a plan view showing the automatic welding apparatus of FIG.

FIG. 3 is a perspective view showing an attachment adjusting means of the automatic welding apparatus of FIG.

[Explanation of symbols]

 A vertical plate member B horizontal plate member 1 automatic welding device 4 bogie 5 sliding means 6 slider 7 welding torch 8 attachment adjusting means 10 guide roller (guide means) 16 torch holder 19 tilting shaft 20 turning arm

Claims (1)

[Claims] 1. A device for performing fillet welding on an abutting portion of a horizontal plate member arranged in a horizontal state and a vertical plate member arranged on an upper surface of the horizontal plate member. A slide means for linearly moving the slider in the traveling direction of the carriage, a welding torch mounted on the slider, an attachment adjusting means for adjusting the attachment position and angle of the welding torch to the slider, and the carriage for the vertical plate member. Guide means for traveling along the inclination axis, and the attachment adjusting means is attached to the slider in a tilted state in the direction of the vertical plate member, and an inclination axis attached so as to be rotatable around the inclination axis. A swivel arm that is fixed at an angular position, and is attached to the swivel arm so that the angle can be adjusted in a direction along the tilt axis, and the welding torch is held in a fitted state and fixed at an arbitrary position in the fitting direction. Automatic welding apparatus characterized in that it comprises the ability of the torch holder.