Protection principle of Willard welding head

I. The basic principle of Weile welding head selection 

1.The diameter of welding head is less than or equal to the pad diameter

2. welding head can't touch the peripheral components 

3. welding head can't block the operator's line of sight 

4. welding head selection reference: try to choose a short welding head; Use chisel shape as much as possible, without round head; Use as straight as possible without bending your head; As far as possible, use thick, not thin welding head to conduct heat = unit area to conduct heat+touch area

2. The basic composition of Willard welding head Willard welding head is based on copper or copper alloy, because it has good heat transfer. Then nickel metal is plated on the welding head by electroplating, so that a protective layer is formed between the copper substrate and the solder. Then, Ni-Cr alloy is plated on the tail of the welding head, and iron is plated on the tip of the to make it easy to tin this part. The heat capacity of welding head varies with its shape and scale, which will affect its thermal performance

3. (1) The service life of Willard welding head 1. Different solders have a great influence on the service life 2. The more elements contained in solders, the shorter the service life of welding head 2. The service life of Willard welding head 1. Setting the welding temperature, the higher the temperature, the shorter the service life. (For every 20 degrees increase, the life of welding head will be reduced by half) 2. The thickness and quality of welding head's outer coating will seriously affect the life of welding head 3. The operating habits of operators 4. Does welding head often maintain it