JP2595013Y2 - Gas shielded arc welding equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention uses an inert gas as a shielding gas, and uses this gas as a wire (welding wire).
Gas shielded arc welding equipment that welds the base metal (workpiece) while shielding the periphery of the base metal, more specifically, positioning the welding torch, and weaving the torch at the set amplitude and period, The present invention relates to a semi-automatic gas shielded arc welding apparatus for moving and welding.

[0002]

2. Description of the Related Art Conventionally, in gas shielded arc welding, welding is generally performed by holding a welding torch by hand. However, for example, when the base material is cylindrical, welding is difficult if the diameter is small, and in the case of a tank having a large diameter, for example, an operator enters a closed space and performs welding, It is environmentally unfavorable, such as welding heat and gas generation, and the degree of fatigue increases. In addition, since the work was performed in an inconvenient position, considerable skill was required to weld the beats (welded iron) neatly without irregularities in width and shape.

Therefore, attempts have been made to perform the above welding work by automatic control. However, if all the welding operations are automated, there is a problem that the equipment becomes large-scale and the equipment cost increases.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a gas shielded arc welding apparatus capable of uniformly welding beat widths and shapes with a simpler configuration than a fully automatic control welding apparatus. It is intended to do so.

[0005]

According to a first aspect of the present invention, there is provided a gas shielded arc welding apparatus, comprising: an arm controller having an arm which can move back and forth and up and down; A servo controller for controlling the torch, and the servo controller is rotatably supported in the housing.
The screw shaft provided and the inner screwed to this screw shaft
And the block is rotated by a motor to rotate the screw shaft.
Move the inner block or the screw shaft relatively back and forth
First, second and third actuators configured to
Has become a combination of eta, the first actuator is attached to the distal end side of the arm toward the screw shaft in the horizontal direction, the first and the second actuator towards the screw shaft in a vertical direction The third actuator is attached to the second actuator with the screw axis oriented in the horizontal direction, and the welding torch is attached to the third actuator and is located near the welding torch. Is equipped with a video camera for monitoring the tip of the welding torch with a monitor, and is configured to remotely and manually control the first actuator to move the second and third actuators forward and backward integrally. , The second actuator is manually and remotely controlled to move the third actuator up and down, and It said third actuator to automatically control a stroke set the third actuator
The torch is configured to be moved back and forth to weave the torch .

According to a second aspect of the present invention, in the gas shielded arc welding apparatus of the first aspect, the first actuator of the servo controller can be turned at an angle of 90 degrees in a horizontal direction with respect to the arm of the arm controller. It is characterized in that it is attached to.

[0007]

The position of the welding torch relative to the base material is determined by moving the arm of the arm controller back and forth and up and down. Then, while watching the monitor, the motor of the first actuator is remotely operated to move the second and third actuators back and forth, and the tip of the welding torch is positioned directly above the groove (welding line) of the base material, and the first actuator is moved. Stop. Next, the motor of the second actuator is remotely operated while looking at the monitor, and the tip of the welding torch is positioned so as to be at an optimum interval position with respect to the welding portion, and the second actuator is stopped. Then
If the third actuator is set to a programmable amplitude and period and an arc is generated while rotating the base material at a predetermined speed, the groove of the base material is automatically and continuously welded. Then, when the tip of the welding torch comes off the groove, the first actuator is remotely operated to correct the position. In this way, the base metal can be automatically welded by automatically controlling the weaving of the welding torch and by correcting the position of the torch with respect to the groove while monitoring the monitor.

According to the arc welding apparatus of the second aspect,
By turning the servo controller 90 degrees, fixing it in that position, and operating in the same manner as described above, the base material can be welded in the axial direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 is a perspective view showing one embodiment of a gas shielded arc welding apparatus according to the present invention, FIG. 2 is a side view of the welding apparatus, FIG. 3 is a plan view of the welding apparatus, and FIG. 5 is a plan view showing a portion of the servo controller of the welding apparatus, FIG. 6 is a plan view showing a welding state by the welding apparatus, and FIGS. 7 and 8 are operating states of the servo controller of the welding apparatus. FIG. 9 is a partially cutaway perspective view showing an actuator of the servo controller, and FIG. 10 is a plan view showing a different welding state by the same welding device.

As shown in FIGS. 1 to 10, the welding apparatus of this embodiment has an arm controller A having an arm 1 of an appropriate length which can move back and forth and up and down, and a rotating part 5 at the tip of the arm 1. Servo controller 6 mounted
And a welding torch 7 attached to the servo controller 6
And

The arm 1 is disposed so as to be supported by a movable portion 4 which moves up and down in a portal frame 3 standing upright on a base 2 so as to reciprocate in the front-rear direction in a horizontal state. Arm 1
Moves the arm 1 up and down and up and down to set the approximate position of the welding torch 7 attached to the servo controller 6 with respect to the base material. Means for moving the arm 1 up and down and back and forth may be any known mechanism. Select and adopt as appropriate. Further, a caster with a stopper may be provided on the lower surface of the base 2.

The servo controller 6 controls a welding torch, and is constituted by combining three reciprocating first, second and third actuators 8A, 8B and 8C having the same structure. . Each actuator is connected to a motor 10 fixed in one end on a rectangular substrate 9 and provided in a housing 16 as shown in detail in FIG. 9, and one end is connected to a shaft of the motor 10 via a coupling or the like. A screw shaft 12 rotatably supported by a support plate 11 having the other end standing upright on the other end of the substrate 9, and horizontally mounted in a housing 16.
And an inner block 13 rotatably screwed onto the screw shaft 12 via a ball.
Are slidably engaged with guide rails 14 upright on the substrate 9, and a sub-table 15 is fixed on the inner block 13. This allows
When the screw shaft 12 is rotated forward and reverse by the motor 10, the inner block 13, that is, the subtable 15 and the screw shaft 1 are rotated.
2 moves back and forth relatively, that is, when the motor is driven with the housing 16 side of the screw shaft 12 fixed, the sub-table 15
Move in the front-rear direction, and conversely, when the motor is driven with the sub-table fixed, the screw shaft 12, and thus the housing side, moves in the front-rear direction.

The first actuator 8A has a screw shaft 12
With the housing 1 facing the tip of the arm 1
6 is fixedly mounted, and is configured to be able to turn at a 90-degree angle in a horizontal direction from a position parallel to the arm 1 and be fixed at that position by a rotating unit 5 such as a clamp mechanism. As a result, the first actuator 8A
When the screw shaft 12 rotates forward, the inner block 13 (sub-table 15) moves forward, and when the shaft 12 rotates reversely, the sub-table 15 moves backward.

The second actuator 8B has a screw shaft 12
Are oriented vertically, and the sub-table 15 is connected and fixed to the sub-table 15 of the first actuator 8A. Further, the third actuator 8C has a screw shaft 1
2 is arranged in a horizontal direction in parallel with the first actuator 8A, and the sub-table 15 of the third actuator 8C is connected and fixed to the housing 16 of the second actuator 8B. Thus, when the screw shaft 12 of the first actuator 8A is rotated forward and reverse by the motor 10, the second and third actuators 8A and 8B move forward and backward integrally, and the screw shaft 12 of the second actuator 8B is rotated forward and backward by the motor. When rotated, the second and third actuators 8B and 8C move up and down integrally, and the screw shaft 1 of the third actuator 8C
When the motor 2 is rotated forward and backward by the motor, the third actuator 8C
Moves back and forth by itself.

The welding torch 7 is vertically fixed and fixed to the outer surface of the distal end of the housing 16 of the third actuator 8C. In the vicinity of the welding torch 7, a video camera 17 is directed toward the distal end of the torch 7. The video of the video camera 17 is monitored by a monitor (not shown) installed near the worker. The first and second actuators 8A and 8B are remotely operated by an operation panel while a worker looks at a monitor. The third actuator 8C is a reciprocating stroke distance (amplitude).
And the speed (period) is set programmable and automatically controlled.

In the figure, reference numeral 18 denotes a base material (weld). In this embodiment, a cylindrical body 18A having a diameter such that a person can be bent in a bent state, and a cylindrical container 1 having the same diameter as the cylindrical body 18A.
8B is welded in the circumferential direction from the inside. The cylindrical body 18A and the cylindrical container 18B are mounted on a support roller 19, and the roller 19 is driven to rotate so as to rotate slowly in a predetermined direction at an appropriate speed. It is configured in.

The arc welding apparatus of this embodiment is constructed as described above. Next, the method of use and operation will be described. When the arm 1 is moved forward, the servo controller 6 enters the cylindrical portion 18A. Therefore, the approximate position of the torch 7 with respect to the groove (weld) of the base material 18 is determined by the above operation, and the arm is stopped. The first and second actuators 8B and 8C are moved back and forth by remotely operating the first actuator 8A while watching the monitor, and the tip of the torch 7 is positioned immediately above the groove to stop the first actuator 8A. . Next, the second actuator 8B is remotely operated while looking at the monitor to position the tip of the welding torch 7 at an optimum interval position with respect to the welded portion, and the second actuator is stopped.

Therefore, the cylindrical body 18A and the cylindrical container 18B
At the set speed, and the third actuator 8C
When the arc is generated within an optimum welding range, for example, the distance of the reciprocating stroke is set to 1 cm and the cycle is set by automatic control, the base metal is automatically and continuously welded. If the tip of the torch comes off the development unit during the welding, the position of the torch is corrected by remotely operating the first actuator while watching the monitor. As described above, the wiving of the torch 7 is automatically controlled, and the position of the torch with respect to the groove is corrected by remote control while monitoring the monitor, and the base material is automatically and continuously welded.

FIG. 10 shows an example of welding the welded portion of the base material 18 in the axial direction. In this case, the servo controller 6 is turned 90 degrees from the above-mentioned state by the rotating portion 5 and fixed. The base material is welded by the same operation as described above, and in this welding, the base material is moved at an appropriate speed in the axial direction.

In the embodiment, the first actuator 8
A subtable of A and a subtable of the second actuator 8B are connected and fixed, and a subtable of the third actuator 8C is fixed to the housing of the second actuator. The housing of the second actuator 8B may be fixed to the table, and both sub-tables of the second actuator 8B and the third actuator 8C may be connected. By this combination, the operation of the first actuator can be performed similarly to the above-described embodiment. The second and third actuators move back and forth integrally, the third actuator moves up and down by the operation of the second actuator, and the third actuator moves back and forth independently by the operation of the third actuator.

[0021]

According to the present invention, since the wiving of the welding torch is performed by automatic control, it is possible to perform welding without irregularities in the width and shape of the beat and to correct the position of the welding torch with respect to the welding line. Can be easily performed by remote control while watching the monitor.

[Brief description of the drawings]

FIG. 1 shows a gas shielded arc welding apparatus 1 according to the present invention.
It is a perspective view showing an example.

FIG. 2 is a side view of the welding device.

FIG. 3 is a plan view of the welding device;

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a plan view showing a servo controller of the welding apparatus.

FIG. 6 is a plan view showing a welding state by the welding device.

FIG. 7 is a perspective view showing an operation state of a servo controller of the welding device.

FIG. 8 is a perspective view showing another operation state of the servo controller.

FIG. 9 is a partially cutaway perspective view showing an actuator of the servo controller.

FIG. 10 is a plan view showing different welding states by the welding apparatus.

[Explanation of symbols]

 Reference Signs List 6 servo controller 7 welding torch 8A first actuator 8B second actuator 8C third actuator 10 motor 17 video camera

Claims (2)

(57) [Scope of request for utility model registration] 1. An arm controller having an arm that can move back and forth and up and down, and a servo controller attached to the arm controller and controlling a welding torch, wherein the servo controller rotates in a housing.
A screw shaft that is freely supported and screwed to this screw shaft
And an inner block provided with
Rotate the shaft to align the inner block or the screw shaft.
First, second and third configured to move back and forth oppositely
Has become a combination of three actuators, the first actuator is attached to the distal end side of the arm toward the screw shaft in the horizontal direction, the second actuator towards the threaded shaft in the vertical direction The third actuator is attached to the second actuator with the screw axis oriented horizontally, and the welding torch is attached to the third actuator and Near the torch,
A video camera for monitoring the tip of the welding torch with a monitor is provided, and the first actuator is manually and remotely controlled to move the second and third actuators integrally back and forth. The second actuator is manually and remotely controlled to move the third actuator up and down, and the third actuator is automatically controlled to set the third actuator.
Move the torch back and forth with a stroke
A gas shielded arc welding apparatus characterized in that it is configured to perform welding. 2. The gas shielded arc welding apparatus according to claim 1, wherein the first actuator of the servo controller is rotatably mounted on the arm at a 90 ° angle in a horizontal direction.