Research on laser spot weld-bonding process characteristics

The stability of the laser spot weld-bond is analyzed and the exhaust means of the gas from the adhesives with different properties are studied.The weld defects of laser spot weld-bonding process are solved.The key of the weld-bonding process is the appropriate exhaust path for the gas from the adhesive decomposition, the plate gap is an important exhaust channel.The greater the adhesive viscosity is, the worse the weldability is.For the low viscosity adhesive, a reliable connection can be got by the slow rising laser pulse welding technology;for the large viscosity adhesive, a reliable connection can be achieved by filler wire and using the laser spike pulse welding process.The welding process can solve the weld defects of different viscosity adhesive, expanding the applications of the laser weld-bonding technology.