Muffle convection brazing and annealing system and method

摘要

A temperature control system for obtaining a desired soak temperature of a workpiece driven through the brazing and annealing system includes a convection muffle for heating the workpiece within a brazing zone of the brazing and annealing system. The temperature control system also includes a first thermocouple positioned above the workpiece and measures a first real-time temperature of an atmospheric convection current directed towards the workpiece before the workpiece absorbs heat from the atmospheric convection current. A second thermocouple is positioned beneath the workpiece and measures a second real-time temperature of the atmospheric convection current after the workpiece has absorbed the heat from the atmospheric convection current. The temperature control system also includes a controller that measures a brazing temperature of the atmospheric convection current directed toward the workpiece based on a temperature difference between the first and second real-time temperatures measured by the first and second thermocouples. When the first and second real-time temperatures correspond to the desired soak temperature, a timer is initiated to soak the workpiece at the desired soak temperature for a predetermined amount of time.