Laser welding condition determination method and laser welding device

A laser welding device comprising:

• a laser oscillator;
• a laser head emitting laser light, output from the laser oscillator, to a workpiece;
• a robot for moving the laser head attached to the robot;
• a controller configured to control an operation of the robot and have a welding condition calculation section;
• and
• a welding condition setting unit connected to the controller,
• wherein the welding condition setting unit includes:
• a workpiece information input section for inputting workpiece information indicating characteristics of the workpiece, the workpiece information including material, a board thickness, and a joint shape of the workpiece,
• a laser information input section for inputting laser information indicating characteristics of the laser light, and
• a display section for displaying a first welding condition calculated by the welding condition calculation section based on a computing equation or a database, which associates the workpiece information and the laser information with a recommended laser power of the laser light, a recommended welding speed, a recommended welding pattern, an estimated strength of a welded portion, and an estimated weld depth of the welded portion, and
• the first welding condition calculated by the welding condition calculation section is any one of the recommended laser power of the laser light, the recommended welding speed, the recommended welding pattern, the estimated strength of the welded portion, and the estimated weld depth of the welded portion.