Components of thermostatic units and laser welding method for producing the components
View Patent ↗A method for joining components of thermostatic systems and thermal relays for low-voltage circuit breakers, the components being constituted by at least one bimetallic element constituted by a lamina with a first face and a second face and at least one connection element that has a substantially flat end part with a third face and a fourth face, its particularity consisting of the fact that it comprises the steps that consist in:—overlapping and coupling the end part of the first face of the bimetallic element with respect to the third face of the end part of the connection element;—subjecting the end part of the second face of the bimetallic element to the welding action of laser means to provide a weld between the bimetallic element and the connection element.
1. A method for joining components of thermostatic systems and thermal relays for low-voltage circuit breakers, said components being constituted by at least one bimetallic element constituted by a lamina with a first face and a second face and at least one connection element comprising a connecting braid that has a substantially flat end part with a third face and a fourth face, wherein the method comprises:
overlapping and coupling the end part of the first face of said bimetallic element with respect to the third face of the end part of said connection element; and
subjecting the end part of the second face of said bimetallic element to the welding action of laser means to provide a weld between said bimetallic element and said at least one connection element, wherein:
said laser means scan the second face along a predefined path that follows a curved profile; and
said curved profile is designed entirely within said second face and has no intersecting portions.
2. The method for joining components of low-voltage circuit breakers according to claim 1 , wherein said laser means are constituted by a solid-state laser.
3. The method for joining components of low-voltage circuit breakers according to claim 2 , wherein the at least one connection element comprises a circuit breaker protection relay connection.
4. The method for joining components of low-voltage circuit breakers according to claim 1 , wherein the at least one connection element comprises a circuit breaker protection relay connection.
5. Components of low-voltage circuit breakers obtained with a method according to claim 1 .
6. A low-voltage circuit breaker, comprising one or more components according to claim 5 .