Method For Identifying The Actual Position And Relative Position Of Cold-pressed Terminals
The solder pins of Distribution box must be accurately positioned, of appropriate size, evenly placed, and have good solderability, which will be more conducive to insertion and welding. The cold-pressed terminal must withstand the high temperature impact generated by heat treatment during the entire assembly process. Infrared preheating and convection preheating are mainly used in welding to transfer heat to the interface between the solder pin and the tin plate to melt the solder paste.
Regarding the identification method of cold-pressed terminals, we must also pay attention to the use of the marking system of related products to determine and identify the equipment. The actual or relative position of the cold-pressed terminal or the end of a specific wire. Next, it is also necessary to pay attention to the use of the marking system of related products to determine and identify the color marking of the cold-pressed terminal and the end of a specific wire.
The identification method of cold-pressed terminals should also be noted at this time that the graphic symbols specified in GB5465 must be used. If auxiliary symbols are required, they should be consistent with the graphics in GB4728. After that, it is also necessary to pay attention to the use of alphanumeric symbols specified in the standard. There is no air gap in the middle column of the cold-pressed terminal magnetic system, and the residual magnetism is too large.
For the identification method of cold-pressed terminals, it is also necessary to file off part of the pole surface at the residual magnetic gap to keep the gap at 0.1~0.3mm, or connect a 0.1uF capacitor in parallel at both ends of the coil. The surface of the activated contactor core is oily or greasy after a period of use. At this time, it is also necessary to wipe the anti-rust grease on the surface of the core clean. The surface of the core is required to be flat, but it is not suitable for over-lighting, otherwise it will easily cause delayed release.
When the cold-pressed terminal is assembled, it must be noted that it can withstand the high temperature in the preheating zone and the temperature transmitted to the terminal body through wave soldering. The flux must not affect the terminal, it is easy to remove, and there must be no residue. The entire assembly process must be able to be cleaned with water. The preheating temperature often reaches 100°C or higher, and it is not uncommon for the wave peak temperature to reach 280°C.
