Robot laser-electric arc hybrid welding device and method

Abstract

The invention relates to the technical field of welding, in particular to a robot laser-electric arc hybrid welding device and method. The robot laser-electric arc hybrid welding device and method is composed of a robot laser welding device, an MIG welding device and a control unit. The robot laser welding device comprises an optical fiber laser, a control unit, a welding robot and a laser head unit. The MIG welding device comprises an electric arc welding gun, a welding gun adjusting fixing frame and an intelligent wire supplying device. The intelligent wire supplying device is connected with the tail portion of the electric arc welding gun and supplies welding wires to the electric arc welding gun. The electric arc welding gun is installed on the welding gun adjusting fixing frame. The welding gun adjusting fixing frame is installed on a laser head of the robot laser welding device. The control unit is connected with the robot laser welding device and the MIG welding device through a circuit and controls the robot laser welding device and the MIG welding device. The robot laser-electric arc hybrid welding device and method have the advantages that melting seams are deep, the speed, the efficiency, the stability and the welding line adaptability are high, and the cost is low, and can be widely applied to fields of large LNG storage tanks, automobiles, aerospace, the shipbuilding industry and petroleum pipelines.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a robotic laser-arc composite welding device and method. Background technique [0002] Welding technology is a method of connecting two or more base metals (workpieces to be welded) into a whole using welding materials (welding rods or wires) under high temperature or high pressure conditions. Welding technology is mainly used on metal base materials. , Commonly used are arc welding, argon arc welding, CO2 shielded welding, oxygen-acetylene welding and laser welding. [0003] Liquefied natural gas (LNG) storage tank is a professional product for storing liquefied natural gas. It is made of 9% Ni low-temperature steel. The welding method is: submerged arc automatic welding is used for circular seams and flat seams, and manual arc welding is used for standing seams and other welds. At present, the welding of large LNG storage tanks has the following problems: 9% Ni steel welding ...

AI Technical Summary

Problems solved by technology

At present, the welding of large LNG storage tanks has the following problems: 9% Ni steel welding requires limited heat input, and the efficiency of submerged arc welding cannot be maximized. In order to reduce welding defects, thin welding wire with a diameter of less than 3.2mm is used, sacrificing welding efficiency. Welding quality; manual arc welding is flexible, but welding efficiency is low

If laser-metal wire gas shielded welding (MIG) is used, it is called composite welding, and the welding uses a trolley-type composite welding machine. This type of automatic welding is suitable for straight welds, but it is not suitable for three-dimensional space welds.

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