Laser comprehensive applications in bridge-strip technology

Qiu'e Zhang; Yongda Li; Yongzheng Li; Junxiu Li

doi:10.1117/12.482879

12 September 2002 Laser comprehensive applications in bridge-strip technology

Qiu'e Zhang, Yongda Li, Yongzheng Li, Junxiu Li

Proceedings Volume 4915, Lasers in Material Processing and Manufacturing; (2002) https://doi.org/10.1117/12.482879
Event: Photonics Asia, 2002, Shanghai, China

Abstract

Bridge-strip is a new type of electric firing device used in passivated electric detonators and related products. To cope with this tiny and delicate device a set of new techniques have been developed to solve the technical problems involved in the manufacture of bridge-strips. This research fully exploited laser advantages in welding, removal and resistance modifing. The photoetching mask is designed and ploted by computer. The bridge-strips are shaped and fabricated by photoetching. This shaping technique is faster, cheaper and more accurate than other techniques. For the sake of more convenient followed operations some strengthening wires are retained in the shaped bridge-strips and fmally removed using a laser beam after the strips are welded onto the electric detonators. The laser point welding between bridge-strips and lead wire is the most reliable mutual melting weld which guarantees the quality of the electric detonators. The high accurate resistance is realized by laser beam modification under the computer monitoring. This technique results in high uniformity of resistance which in turn guarantees the critical synchronism requirement of the electric detonators. This research comprehensively employed many functions of a laser beam in many technical steps. Some techniques presented in this paper are very creative and practical.

Citation Download Citation

Qiu'e Zhang, Yongda Li, Yongzheng Li, and Junxiu Li "Laser comprehensive applications in bridge-strip technology", Proc. SPIE 4915, Lasers in Material Processing and Manufacturing, (12 September 2002); https://doi.org/10.1117/12.482879

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