Ultra-fast laser scanning assisted integrated welding method for micro casting and forging

An ultra-fast laser scanning assisted integrated welding method for micro casting and forging, comprising the following steps:

• Step one:
• according to material characteristics of a structure to be welded, preparing liquid metal in a melt crucible;
• Step two:
• according to physical characteristics of a material, setting a heating temperature of a guide tube;
• Step three:
• based on a welding speed, a designed thickness of a single layer per unit time, and a width of lower edge and a width of an upper edge of a groove at different positions that vary with a welding height, calculating an amount of the liquid metal to be filled per unit time;
• Step four:
• setting a distance between a micro-forging area and a liquid metal outflow area;
• Step five:
• based on shape of a groove in an area to be welded, designing a wobbling mode of an ultra-fast laser scanning with a wobbling amplitude, a wobbling frequency, and a laser power, and meanwhile setting a shielding gas flow rate;
• Step six:
• checking whether the melt crucible, the guide tube, the shielding gas, a laser for emitting ultra-fast laser, and a forging device are in good working conditions or not;
• Step seven:
• according to the process flow, setting start-stop signals of a crucible system, an ultrafast laser auxiliary system, and a micro-forging system when a welding trajectory changes, respectively, the start and stop signals of the crucible system are at a same position as those of the ultrafast laser auxiliary system;
• and
• Step eight:
• turning on the device to start welding.