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Suppressing laser-induced plume for laser edge welding of zinc coated steels

A laser welding and laser technology, applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., can solve problems such as increasing costs

Inactive Publication Date: 2015-07-29
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, establishing an inert gas environment in the weld area will add cost

Method used

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  • Suppressing laser-induced plume for laser edge welding of zinc coated steels
  • Suppressing laser-induced plume for laser edge welding of zinc coated steels
  • Suppressing laser-induced plume for laser edge welding of zinc coated steels

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Embodiment Construction

[0046] The following discussion of embodiments of the invention relating to systems and methods for suppressing laser-induced plumes for laser edge welding of galvanized steel is merely exemplary in nature and is in no way intended to limit the invention or its application or use.

[0047] figure 1is an illustration of a typical laser welding system 10 in which a first workpiece 12 and a second workpiece 14 are welded together. System 10 includes rollers 16 that press second workpiece 14 down onto first workpiece 12 as laser beam 18 welds workpieces 12 and 14 together. The velocity of movement of the roller 16 and the laser beam 18 relative to the stationary workpieces 12 and 14, as well as the energy level of the laser beam 18, are determined to provide a weld region 20 that meets the requirements for joining the workpieces 12 and 14 together.

[0048] Laser welding system 10 works well for many purposes. However, in some applications, such as when welding galvanized steel,...

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Abstract

A system and method for stabilizing the molten pool in a laser welding operation by suppressing a laser-induced plume which occurs when zinc coated steels are laser welded. The plume is a result of vaporization of zinc, and the zinc vapor in the plume disturbs the molten pool and causes blowholes, spattering and porosity. The stabilization is achieved by applying a gas such as air through a nozzle to the weld area, where the gas has sufficient velocity and flow rate to blow the zinc vapor away from the molten pool. Dramatically improved weld quality results have been demonstrated. Configuration parameters which yield optimum results—including gas flow rate and velocity, and nozzle position and orientation relative to the laser impingement location on the steel—are disclosed.

Description

technical field [0001] The present invention relates generally to improving weld quality in laser welding operations, and more particularly to systems and methods for stabilizing the weld pool by suppressing laser-induced plumes that occur when galvanized steel is laser welded, wherein The stabilization is achieved by applying gas from a nozzle to the weld zone and the gas is applied at a sufficient velocity and mass flow rate to dissipate the plume. Background technique [0002] Galvanized steel is widely used in the automotive industry and in other industries where corrosion resistance is important. For example, automobiles often use galvanized steel for roofs, side panels, door frames, floor panels and other components. [0003] Most cars and trucks consist of several structural and body panels that are brazed or welded together. Welding is preferred over brazing because welding can generally be performed faster and less expensively. At the same time, modern vehicle as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/12B23K26/24B23K101/18
CPCB23K26/1405B23K26/3293B23K26/123B23K26/24B23K2101/185B23K26/037B23K26/142B23K26/1437B23K2101/34B23K2103/08
Inventor D.杨D.A.加特尼B.E.卡尔森J.王
Owner GM GLOBAL TECH OPERATIONS LLC