Method To Avoid Welding Overheating And Damaging The Temperature Fuse
Today, JAYE will introduce to you the methods to avoid thermal fuse damage caused by welding overheating:
Use longer pins as much as possible. Longer pins allow longer soldering time and reduce the possibility of overheating. Figure 3 shows an example of how to keep longer pins in smaller positions. In the case of short pins, use needle-nose pliers or other tools to clamp the position between the solder joints on the pins and the fuse body to dissipate heat, and prevent the amount of solder from being transferred into the thermal fuse. At the same time, the welding temperature should be controlled not to be too high, and the welding time should be as short as possible.
● When soldering or spot welding, the pin must be properly fixed, otherwise the pin or the sealing resin may be damaged. When the sealing resin is hot, pulling or twisting the pin may cause it to disconnect from the fuse. Cause mechanical failure. Therefore, do not move the fuse before the sealing resin cools. You can solder, wrap, fix or move the thermal fuse again at an interval of at least 30 seconds. The cooling time depends on the welding temperature, welding (or spot welding) time, lead step length, etc., it is recommended first Do experiments to determine the best welding (spot welding) time, temperature and what kind of cooling tool.
● During spot welding, current must not flow through the temperature-sensitive alloy.
● The mechanical connection cannot rely solely on brazing.
● Incoming goods must be inspected to see if they are damaged during transportation. It is recommended to inspect again after installation. It is recommended to conduct conductivity measurement or X-ray inspection before and after installation.
● Prototype samples or early production sampling and experimental assembly test products must be tested. The temperature of the thermal fuse and key parts in the product must be measured under normal working and abnormal conditions. The thermal fuse product must be checked after the test.
