Tiny bridge wire welding method

Abstract

The invention discloses a tiny bridge wire welding method. An ultrasonic spun gold bonding machine is adopted as welding equipment, and the method specifically comprises the following steps that (1), a first welding spot is ultrasonically welded firstly, a wire feeding locating clamp is opened, a welding head is pulled upwards for wire distribution, and the wire feeding locating clamp is closed; (2), a second welding spot is ultrasonically welded firstly, then the wire feeding locating clamp is opened, the welding head is pulled upwards to be lifted and shifted by 1 mm, and the wire feeding locating clamp is closed; and (3), a third spot is broken through ultrasonic welding firstly, then the welding head is lifted, the wire feeding locating clamp is opened, and the wire feeding clamp is closed after wire feeding resetting. According to the method, the 40-micrometer 45-degree welding head and a tiny nickel-chrome wire of 20 micrometers are subjected to matched welding, parameter setting of the ultrasonic spun gold bonding machine is optimized, the problems that in the field, a tiny ignition bridge wire is low in manual welding efficiency and large in resistance deviation, and cold solder joints are likely to be generated during welding are solved, and the welding efficiency is improved by about 40 times.

Description

technical field [0001] The present invention relates to the technical field of pyrotechnics, and more particularly, the present invention relates to a method for welding fine bridge wires, which is suitable for the fabrication of electrodes for ignition elements of pyrotechnics, and can also be applied to other electronic fields. Background technique [0002] In the field of pyrotechnics production, the production of low-energy micro pyrotechnics requires a large number of manufacturing bridge wire diameters. ignition electrode. At present, manual wire welding is mainly used in this industry. Due to the extremely light weight and curved shape of this type of fine nickel-chromium wire, when welding the alignment wire, it is often caused by slight breathing movements or static electricity on the hands. Influence, brings many difficulties to welding positioning. At the same time, since the material of the fine bridge wire is nickel-chromium metal, this material does not melt...

AI Technical Summary

Problems solved by technology

At present, the industry is mainly produced by manual cloth wire welding. Due to the extremely light weight and curved shape of this type of fine nickel-chromium wire, when welding alignment cloth wires, it is often caused by slight breathing movements or static electricity on the hands. Influence, bring a lot of difficulties to welding positioning

At the same time, since the material of the fine bridge wire is nickel-chromium metal, this material is not melted with tin-lead solder, and the bridge wire can only be fixed by wrapping it with tin-lead solder. Quality and efficiency are greatly constrained

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