Welding principle of automobile wiper relay

The wiper is driven by the motor, and the rotary motion of the motor is converted into the reciprocating motion of the wiper arm (that is, the part on the windshield other than the wiper blade) through the linkage mechanism, so as to realize the wiper action.

The invention relates to an automobile wiper intermittent device which can control the automobile wiper assembly to be in an intermittent working state. It is to fix an end cover at the open end of the existing rectangular shell, and fix three terminal posts on the end cover respectively, and make corresponding chutes on the left and right board walls of the shell, insert the circuit board into the chutes and fix it, and install the electronic components on the circuit board. It can not only trigger and conduct once after the quick start, but also wait for the next trigger and conduct according to the set time (intermittent), and continue to work in cycles, To achieve the purpose of intermittently controlling the operation of automobile wiper assembly.

The automobile relay is an indispensable component in the automobile, which mainly plays a control role. The automobile wiper relay is mainly composed of magnetic circuit system, contact system and recovery mechanism. The magnetic circuit system is composed of iron core, yoke, armature, coil and other parts, the contact system is composed of static spring, dynamic spring, contact base and other parts, and the recovery mechanism is composed of recovery spring or tension spring.

Welding process of automobile wiper relay:
PCB type non-plasticized relay is extremely susceptible to contamination by flux. It is recommended to use a flux-resistant or plastic-sealed relay to prevent flux gas from entering from the gap between the leading-out end and the base and the shell. If the flux-resistant relay is preheated and dried (100 ℃ for 1 minute), it can further prevent flux intrusion.

When using flux or automatic welding, be careful not to damage the performance of the automobile wiper relay. Flux-resistant relay or plastic-encapsulated relay can be applied to the immersion welding or wave soldering process, but the welding temperature and time of Z large should be controlled according to the selected automobile relay. There are three main welding methods for automobile relays:
1. Manual welding: the recommended welding temperature is 300 ℃ - 350 ℃, and the welding time is controlled within 2 seconds.
2. Cooling: since the heating of automobile relay caused by soldering process can be relieved by cooling after process Z, do not change the temperature suddenly, especially avoid cold shock on thermal relay.
3. Wave soldering: the recommended welding temperature is 240 ℃~260 ℃, the time is about 5 seconds, and the best welding temperature is 250 ℃.