LASER BEAM WELDING METHOD

• Main Author: KANAO YASUHIKO
• Format: Patent
• Language: English
• Published: 24.10.1989
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

PURPOSE:To easily weld and to form the hole for displaying a weld zone without using a piercing puncher, etc., by bisecting a laser light and performing welding and the cutting of the hole for displaying by the respective laser light, in case of the welding of two piece of steel sheet and the cutting of the hole for displaying a weld zone. CONSTITUTION:The laser light emitted from the laser oscillator 1 is bisected by a dividing mirror 2 in welding the end faces of a preceding steel sheet 11 and succeeding steel sheet 12 along an abutting weld line 13 and forming the hole 15 for displaying a weld zone. One part of the laser lights of the divided laser light is converged by the condensing lens 5 provided under reflection mirrors 3, 5 and reflection mirror 5, a reflection mirror 4 and the condensing lens 5 are simultaneously moved in an arrow mark direction along the weld line 13 and the abutting groove part of both steel sheets 11, 12 is welded. The other part of the laser light divided by the dividing mirror 2 is reflected by the reflection face 8a of an eccentric reflection mirror 8 via a reflection mirror 6 and condensing lens 7, forming the hole 15 for displaying the weld zone as well by drawing a circle close to the weld zone of the succeeding steel sheet 12 by the rotation of a rotary shaft 8b. Piercing and welding can simultaneously be executed without using a piercing puncher.