JPS60244479A - Automatic welding equipment - Google Patents

Abstract

PURPOSE:To reduce the cost in welding by providing a driving device of a welding torch rotatable freely with the tip as a fixed point and a work stand and also by arranging a terminal detector changing a welding direction with the front wall and angled part. CONSTITUTION:A plane plate 1 is placed on a work stand 3 and the stand 3 is made movable freely in X direction with the 1st driving device 4. A welding device 6 is fitted freely movably to a beam 6 provided in the direction Y intersecting at right angles with the direction X, and is moved with 2nd driving device 7. A detector 9 detects a welding place for a front wall 2A and a torch 8 is ignited and performs a fillet weld. The operation of a terminal detector 11 and the actually related operations of the driving devices 4, 7 and torch 8 are taken place according to the set program and an automatic welding is enabled without any teaching work. Consequently the input data into a controller are lessened and the cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic welding device used when welding a thin plate to a steel structure product such as a flat plate.

Most of this type of welding involves downward and horizontal fillet welding, where the direction changes over a short weld line, but in the past, the welding location was memorized by teaching the welding machine's control device, and such control devices Welding was carried out using the same method, or by moving a sensor-equipped torch along the object to be welded.

However, such conventional methods have the following problems.

■ Ya teaching work is required for the workpiece.

■Due to dimensional assembly errors depending on the workpiece, welding parts are likely to fail.

■ It is difficult to weld in the thickness direction of thin plates because it is difficult to detect with sensors.

■ Programming takes time because there is a lot of input data to the control device.

■ Movement is limited in the case of arm type.

The present invention was proposed to solve these problems, and its purpose is to provide an automatic welding device that can automatically weld thin plates with a relatively simple configuration.

The present invention will be described below based on illustrated embodiments.

FIG. 1 shows an example in which an L-shaped thin plate 2 is welded to a flat plate 1 at three locations at the same time.

The flat plate 1 is placed on a workpiece table 3, and the workpiece table 3 is movable in the X direction by a first drive device 4. A beam 5 is provided above the workpiece table 3 along the X direction orthogonal to the X direction, and a welding device 6 is movably attached to the beam 5 and is moved by a second drive device 7.

The welding device 6 includes a welding torch 8 that is rotatable with its tip as a fixed point, detectors 9 and 10 that respectively detect welding locations in two directions, a corner detection portion 11A with a bent tip, and a linear It consists of a terminal detector 11 having a front wall detection section 11B.

In such a configuration, when the thin plate 2 has a front wall 2A as shown in FIG. 3, the welding torch 8 is moved in the X direction and the welding location is detected by the detector 9. When detected, the torch is ignited. Since it is activated, fillet welding is performed in the X direction using the welding torch 8 (see FIG. 3 (8)). Terminal detector 1
When the front wall detection section 11B of No. 1 detects the front wall 2A, the terminal detector 11 is pulled up diagonally backward, and the workpiece table 3 is moved by a distance S from the tip of the torch to the end of the detection section 11B to perform welding in the X direction. Do the following. Next, as shown in FIG. 3), when the welding point on the front wall 2A is detected by the detector 10, the torch is ignited and welded backward by a distance S, as in the case of the detector 9, that is, the welding device 6 is moved back by -X. The welding torch 8 is rotated by the front wall detecting section 11, and the welding direction is changed to the normal welding posture detected by the detector 9, and forward welding is continued.

Furthermore, if there is no front wall as shown in FIG. 4, the welding device 6 moves in the -y direction while detecting the welding location with the detector 9, and when the corner detection section 11A detects the corner, welding The device 6 moves a distance S and stops (Fig. 4 (5), (
(See b)).

Next, welding is performed by rotating the welding torch 8 in a direction preset in the program, moving the workpiece table 3 in the X direction by the thickness t. Subsequently, the welding device 6 is moved by a distance S'' from the tip of the torch to the end of the detector 9, that is, the welding torch is rotated 900 times, the welding location is detected by the detector 9, and welding is continued.

When rotating the torch 8 in this manner, it is desirable to temporarily stop the arc.

In such a configuration, the distances s, s', s''.

The automatic welding device according to the present invention has the above-mentioned configuration, so that the automatic welding device according to the present invention has the following features. be effective.

■ Teaching work on the workpiece becomes unnecessary.

■ By utilizing the detector function, input data to the controller can be extremely reduced. This allows a large number of workpieces to be processed and reduces costs.

■ End welding of thin plates is possible.

■ Simultaneous welding is possible even for workpieces with uneven assembly precision or workpieces with similar shapes.

■ Since the work table is moved, large items can be welded.

Although not shown in the drawings, the inventor is considering making the device more compact by fixing the first drive device 4 to the beam 5 and moving it in the X direction or both the X direction and the X direction.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an automatic welding device according to the present invention, FIG. 2 is a perspective view showing the detector portion thereof, and FIGS.
B), (C), and (D) are schematic diagrams showing the welding procedure when there is a front wall, and FIG. 4 (A). (B), (C), and (D) are schematic diagrams showing welding procedures when there is no front wall. 1. Flat plate, 2. Thin plate, 3. Work table, 4. First drive device, 5. Beam, 6. Welding device, 7. Second drive device, 8. Welding torch. 9, 10...Detector, 11...Terminal detector, IIA
... Corner detector, 11B... Front wall detector, 12... Controller. (A) (B) (A) (B) Figure 3

Claims (1)

[Claims] (1) A welding torch that is rotatable with its tip as a fixed point, a workpiece table that supports the workpiece, a first drive device that moves this workpiece table in the X direction, and a welding torch that is attached to the workpiece. On a second drive device configured to move relatively in the X direction perpendicular to the X direction, there is a detector that moves together with the welding torch to detect the welding location and activate the torch, and a detector that moves together with the welding torch and operates the torch. An automatic welding device characterized in that it is equipped with an end detector that detects the front wall and corners of the machine and performs welding that changes the welding direction at the front wall and end welding that reverses the welding direction at the corner. .