Method for the induction brazing of parts having complex shapes, and single or multiple brazing station for implementing same

摘要

A method for brazing parts having complex profiles, while enabling reproducible implementation conditions to be defined. The method adjusts a heat cycle during brazing by controlling and mapping heat, while taking emissivity coefficient of the material to be brazed into account. Further, a brazing station includes a power generator configured to supply a predetermined voltage to a transformer connected to a circuit forming a shape inductor, the circuit having an overall shape of the parts to be brazed. A pressure mechanism exerts a load on the parts to be brazed. A camera establishes a heat map. A laser-sighted infrared pyrometer measures the brazing temperature by radiation after parameterizing an emissivity coefficient, other parameters being fixed. A controller supplies a set power to the generator on the basis of the measured temperature.

主权项

1. An induction brazing method for parts able to have a complex shape, comprising:
defining a heating heat cycle comprising phases of temperature rise, leveling and cooling depending on a material to be brazed; depositing a brazing seam on a joint plan between the parts to be brazed; exerting a substantially uniform pressure onto the parts to be brazed; making available a heat mapping of the material to be brazed taking variations of emissivity coefficient for such material into account during a cycle for a heating homogenization check; and then regulating such heat cycle by a closed servo loop from a sight in one point being heat representative by further taking variations of the emissivity coefficient of the material in such point into account and by a localized heat through a shape induction closest to the joint plan of the parts to be brazed, on which the brazing seam has been deposited, wherein an inductor presents globally a shape of the joint plan of the parts to be brazed.