A kind of argon arc welding welding method after silver-plated aluminum tab

Abstract

The invention relates to an argon arc welding method of a silver-plated aluminum lug plate. The argon arc welding method includes the following steps: (1) sequentially placing an insulation heat-resisting base plate, a metal conducting plate and the silver-plated aluminum lug plate into the lower portion of a coil wire outlet head pressed to be flat from bottom to top, (2) tightly pressing the upper portion of the coil wire outlet head through a heavy object, (3) coating the electric conductive portions, except for the welding portion, of the silver-plated aluminum lug plate with heat conductive and insulation mud, (4) welding the coil wire outlet head and the periphery of the silver-plated aluminum lug plate together in an argon arc welding mode, and (5) rapidly removing the insulation mud, and covering the surface of the silver-plated aluminum lug plate with wet cloth. By means of the argon arc welding method, due to the fact that the electric conductive portions of the silver-plated aluminum lug plate are coated with the heat conductive and insulation mud before welding is carried out, the temperature of the electric conductive portions is accordingly low, blistering and blackening of a silver coating are reduced, the insulation mud is rapidly removed after welding is completed, then the surface of the silver-plated aluminum lug plate is covered with the wet cloth, and therefore heat radiation is guaranteed.

Description

technical field [0001] The invention relates to a welding method of argon arc welding after aluminum lugs are plated with silver. Background technique [0002] Rail vehicles such as subways and light rails generally adopt the method of reducing the weight of on-board equipment in order to increase the transport capacity. Aluminum profiles are widely used in automotive filter reactor coils, and the aluminum lugs used for external connection of the coils require silver plating on the aluminum surface to improve contact stability during use. In order to meet the vibration conditions during the operation of rail vehicles, argon arc welding (TIG) is generally used to weld the silver-plated lugs and coils. Since aluminum is more active than silver, most of the aluminum sheets are only suitable for use when the temperature does not exceed 250 ℃ after silver plating. 0 In the case of C, the arc welding temperature of argon arc welding (TIG) is 1000 0 Above C, it often causes blis...

AI Technical Summary

Problems solved by technology

Since aluminum is more active than silver, most of the aluminum sheets are only suitable for use when the temperature does not exceed 250 ℃ after silver plating. 0 In the case of C, the arc welding temperature of argon arc welding (TIG) is 1000 0 Above C, it often causes blistering and blackening on the silver-plated surface during welding, which affects the contact stability requirements of the filter reactor when used.

Images