Laser cutting process of titanium alloy, and auxiliary laser cutting system

Abstract

The invention provides a laser cutting process, and aims to ensure the laser cutting quality of titanium alloy, prevent the titanium alloy from being oxidized in the laser cutting process, and well assist to blow vaporized metal away to avoid the formation of adhering slag. According to the laser cutting process, laser beams are focused to a titanium alloy workpiece under the condition of helium protection; the workpiece which is irradiated by laser spots with high power density is instantly vaporized; and in the vaporization process, cutting high-pressure water flow is assisted to blow the vaporized metal away, so that the workpiece can be cut, the formation of the adhering slag can be well avoided, and a smooth cutting surface can be obtained.

Description

technical field [0001] The invention relates to a laser cutting process, in particular to a titanium alloy laser cutting process and an auxiliary laser cutting system. Background technique [0002] Laser cutting is that the horizontal laser beam emitted by the laser is transformed into a vertically downward laser beam through a 45° total reflection mirror, and then focused by a lens to form a very small spot at the focal point. The laser power density at the spot will be up to 10 6 ~10 9 W / cm 2 . The workpiece at its focal point is irradiated by the high-power-density laser spot, which will generate a local high temperature above 10,000°C, which will vaporize the workpiece instantly, and then cooperate with the auxiliary cutting gas to blow away the vaporized metal, thereby cutting the workpiece into a small With the movement of the CNC machine tool, countless small holes are connected to form the shape to be cut. Since the frequency of laser cutting is very high, the c...

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