A micro-tension wire feeding device and a bridge wire automatic welding system containing the device

Abstract

Provided are a micro-tension wire feeding device (3) and an automatic bridge wire welding system with same. The micro-tension wire feeding device (3) comprises a shell (300), and a tension rod (301), a wire passing wheel (304), a clamping member (305) and a tension wheel (302) which are arranged on the shell (300), and a damper in transmission connection with the tension wheel (302), wherein one end of the tension rod (301) is connected to the shell (300), and the other end thereof is provided with a pulley (306). The automatic bridge wire welding system comprises a micro-tension wire feeding device (3) and a bridge wire positioning device (4), wherein the micro-tension wire feeding device (3) feeds a bridge wire (96) into the bridge wire positioning device (4).

Description

technical field [0001] The invention relates to a micro-tension wire feeding device and a bridge wire automatic welding system containing the device. Background technique [0002] With the rapid development of the automobile industry, automobile safety will be promoted to a higher level and level, which puts forward higher quality requirements for the electric ignition tube, the core initial trigger element of the automobile passive safety system. The core component of the electric ignition tube is the electrode plug welded with the bridge wire. The ignition parts in the electric ignition tubes for airbags, industrial electric detonators, and military electric igniters are electrode plugs welded with bridge wires. In actual use, the electrode plug is connected to the external circuit, and is the core component of components such as automobile airbags, industrial electric detonators, and military igniters. The function of the electrode plug is to have the functions of struc...

AI Technical Summary

Problems solved by technology

According to incomplete statistics, the current demand for automobile airbag electric ignition tubes for domestic automobiles is about 100 million. Due to technical limitations, only a few companies in the United States have automatic mechanical welding bridge wire production lines in the world. The tubes are basically hand-welded bridge wires, and most of the manual-welded bridge wires use brazing technology. Manual welding has the following disadvantages: (1) The dispersion of the resistance value of the bridge wires is greatly affected by human factors; (2) due to the residual brazing Due to the role of the agent, there are both dielectric corrosion and electrochemical corrosion in the welded joints. The preferred corrosion parts of these two types of corrosion are the parts that are connected to the bridge wire. Therefore, the bridge of the electric detonator ignition device formed by this manual brazing process The resistance value of the wire will increase irregularly due to different corrosion rates during the storage period, and in severe cases, it will cause the electric detonator to ignite and fail; (3) there is zinc chloride (ZnCl) or ammonium chloride (NH 4 Cl) Evaporation of harmful gases and heavy metal lead (Pb), etc., endangers the environment; (4) The welding operation method has high requirements on the welder's eyesight and great damage, which will cause diseases such as electro-optic keratitis; (5) The welding efficiency is very low, labor High strength, difficult to meet market demand

[0005] At present, bridge wires are generally tens of microns of metal wire, such a small metal wire can only withstand the weight of a few grams; if the bridge wire entering the bridge wire welding system is not under tension, it is difficult to connect the bridge wire and the electrode. Alignment welding, if the bridge wire is under too much tension, it is easy to break the wire

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