A welding method for a relay contact reed assembly

Abstract

The invention discloses a welding method for a relay contact reed assembly. According to the welding method, a clamping method of an original clamp is changed, and dimension requirements for each position of the contact reed assembly are guaranteed; a traditional welding method of a thin piece and a thick piece is changed, and the thick piece is taken as a main welding face; a traditional welding method employing tungsten copper alloy, chromium zirconium copper alloy and beryllium cobalt copper alloy as electrode materials to weld nickel silver and a silver magnesium nickel assembly is changed, and silver copper alloy and silver chromium alloy are taken as electrode tips to weld the nickel silver and the silver magnesium nickel reed assembly; problems of overhigh temperature of bonding and welding areas of the reed assembly and an electrode in a long term are solved, and burn damage to the reed assembly caused by the electrode in a welding process and crystal boundary organization change are greatly reduced.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a welding method for a relay contact reed assembly. Background technique [0002] The contact reed component is a very important component in the relay. In many small and precision sealed relays, one end of the silver-magnesium-nickel sheet is directly used as the current contact and provides a certain contact pressure for the contact. The other end of the sheet is connected to the wrap angle and The seat plate terminal is welded, and the spot welding is usually used between the welding reed and the connection wrap angle, such as Figure 5 , Figure 6 and Figure 7 As shown, it includes the welding reed and the welding angle. The left end of the welding reed has a terminal, and the right end of the welding angle has a seat plate terminal, which is in contact with the right end of the welding angle. This area is the welding area. The relative position and size of the components...

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Problems solved by technology

[0006] 3. The materials of the upper electrode and the lower electrode are traditional non-ferrous metal spot welding electrode materials. The contact resistance between the electrode and the welding wrap angle and the contact surface of the welding reed is relatively large, and the heat dissipation is poor;

[0007] 4. The surface of the spring assembly after spot welding has whitening and burns, and the burns on the surface of the reed are more serious than the surface of the welding wrap angle. Through the analysis of the crystal phase of the welded parts, it is found that there is a weakening of the grain boundary

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