JPH058037A - Controller for arc welding machine - Google Patents

Abstract

PURPOSE:To furnish a controller of an arc welding machine enabling even an unskilled operator to input a command signal and perform satisfactory welding by observing a finished state of a work. CONSTITUTION:A robot 1 moves a torch (not shown in the figure) of the arc welding machine 2 and performs welding and a control means 3 controls the arc welding machine 2 and the robot 1. The operator then observes the finished state of the welded work, inputs the command signal 4 to execute correction according to its result to the control means 3 and corrects welding conditions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc welding machine controller for correcting welding conditions.

[0002]

2. Description of the Related Art In recent years, arc welding machines which are automated by robots are widely used.

Conventionally, in this type of arc welding machine, the welding conditions such as welding current, welding voltage, and welding speed, which are the welding conditions, are observed by an operator, and the conditions are set based on the results. Then, the following welding conditions were corrected by inputting numerical values.

[0004]

However, in the above-mentioned conventional configuration, the operator observes the welded work, sets the conditions, and inputs the numerical values. Therefore, it takes time for the operator who has little experience in welding to set the conditions. Therefore, it was difficult to perform good welding.

The present invention solves the above-mentioned conventional problems. Even an unskilled worker can perform good welding simply by inputting a command signal for adding a correction based on the observation of the finished state of the work. It is an object of the present invention to provide a control device for an arc welding machine that can be used.

[0006]

In order to achieve the above object, the present invention comprises an arc welding machine, a robot for moving a torch of the arc welding machine, and a control means for controlling the arc welding machine and the robot. The control means is configured to input a command signal based on the observation result of the welded work and correct the welding condition.

[0007]

In the above construction, when the operator observes the finished state of the work and inputs a command signal based on the result, the control means corrects the welding condition, so that the welding can be appropriately performed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a block circuit diagram of a control device for an arc welding machine. That is, the robot 1 uses the arc welding machine 2
The torch (not shown) is moved and welded, and the control means 3 controls the arc welder 2 and the robot 1. The operator observes the finished state of the welded work and inputs the command signal 4 to the control means 3 according to the result to correct the welding conditions. The control means 3 has a microcomputer (not shown) and calculates appropriate welding conditions by the command signal 4.

FIG. 2 is an operation flowchart for improving the bead width and bead shape by the software of the control means 3 and reducing the overlap and undercut when they occur. In the present embodiment, it is premised that the proper welding voltage E with respect to the welding current I becomes linear and the equation E = AI + B (A and B are constants) holds. That is,
When the work is started, welding conditions are set in step 1 and welding is started in step 2. When the welding is completed in step 3, the worker visually judges the state of the welded bead in step 4, and inputs the command signal 4 so as to correct the bead in step 5. Although the bead width is changed in step 6, when increasing the bead width, as shown in FIG.
There are a method of decreasing the welding speed and a method of increasing the welding current. If YES, the welding speed is reduced by 10%, and if NO, the welding current is increased by 10%. When it is desired to make the bead width flat in step 7, the welding voltage is increased by 1 V as shown in FIG.
When it is desired to reduce the overlap in step 8, there are a method of increasing the welding speed by 10% and a method of increasing the voltage by 1 V as shown in FIG. If you want to reduce the undercut in step 9, you can reduce the welding speed by 10% as shown in Fig. 6,
There is a method of lowering the voltage by 1V.

As described above, according to the control device for the arc welding machine of the embodiment, the operator observes the finished state of the work, and based on the result, the operator outputs the command signal 4 for making a correction. The welding conditions can be corrected by inputting to, and welding can be performed appropriately.

[0012]

As is apparent from the above embodiments, the control device for an arc welding machine of the present invention controls the arc welding machine, the robot that moves the torch of the arc welding machine, the arc welding machine and the robot. A control means is provided, and the control means inputs a command signal based on an observation result of a welded work to correct the welding condition. With this configuration, even an unskilled worker can finish the work. By observing, good welding can be performed only by inputting a command signal for adding correction.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of a control device for an arc welding machine according to an embodiment of the present invention.

FIG. 2 is an operation flowchart of a control device of the arc welding machine.

FIG. 3 is an operation flowchart when the bead width is corrected by the control device.

FIG. 4 is an operation flowchart when the bead shape is corrected by the control device.

FIG. 5 is an operation flowchart when the overlap is reduced by the control device.

FIG. 6 is an operation flowchart when the undercut of the control device is reduced.

[Explanation of symbols]

 1 robot 2 arc welder 3 control means 4 command signal

Claims (1)

Claim: What is claimed is: 1. An arc welding machine, a robot for moving a torch of the arc welding machine, and a control means for controlling the arc welding machine and the robot. An arc welding machine control device that corrects welding conditions by inputting command signals based on the observation results of the workpiece.