METHOD FOR BRAZING ROTOR BARS TO END RINGS OF A ROTOR FOR AN ASYNCHRONOUS AC MOTOR

摘要

a process for soldering of the end rings (20) with rotor bars (12) for forming a squirrel cage rotor set (10) is to assemble the rotor (10) in a supporting device (22) for solderinga spacer (16) is solder bar placed between the rotor (12) and end rings (20) to preheat the rotor (10) and the device (22) up to a brazing temperature lower than the temperature of the aging of rotor bars (12) and end rings ( (20).the temperature is high enough so that the difference of thermal expansion between the bars of the rotor (12) and the support device (22) generates a predetermined pressure on the joint, so that after brazing and soldering of the joint cooling.a support (16) or a predetermined thickness weld end faces of the rotor bars (18) in the outer ring (20); and a joint for welding, soldering, the phases of rotor bar end (18) of the end ring (20).a supporting device (22) is used to maintain a predetermined pressure in a squirrel cage rotor (10) for the operation of welding rods (12) with the rotor end rings (20), so as to enable the formation of a solder joint.the rotor (10) includes a set of rotor bars (12) arranged on a rotor core (14) and the ends (18) are positioned on the solder blocks (16) located on the end rings (20).the supporting device (22) includes means for positioning the positioning device in the rotor, and means for applying a predetermined pressure to the pressure on the end rings (20), a bar of the rotor (12) and holds solder (16) of the rotor, so that when the ends (18) of the rotor bars (12),holds solder (16) and end rings (20) are soldered, the solder joint is obtained