Lower-power laser and arc hybrid welding method and device
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United States of America Patent
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Mar 3, 2015
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Dec 21, 2010
filing date -
Dec 22, 2009
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Abstract
A low-power laser and arc hybrid welding method includes the steps of matching laser pulses with arc phases, and inducing compress arcs by the laser pulses. A laser peak pulse is triggered from half of the positive half-wave to half of the negative half-wave of alternating arc current. The sum of laser peak pulse width and laser basic pulse width is equal to the time width from a laser pulse triggered point to a negative half-wave end point of the alternating arc current. A welding device for carrying out the method is disclosed. An angle formed by the axis of a laser beam (1) and the vertical direction is in the range of −50°-50°. An angle formed by the axis of the laser beam (1) and the axis of an arc torch (2) is in the range of 20°-120°. Arc power density is adjusted minutely in the range of 103-105 by adjusting the alternating arc current, protrusion quantity of an electrode (3) and gas flow velocity of a nozzle. The method and the device can reduce the consumption and save the cost.
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