Bolt trimming die is a mold for making screws, which can be roughly divided into two categories:

1. Heading die (main die, wire die, scissors, upper punch, lower punch, punch sleeve, sleeve, etc.).
2. Thread rolling board (mechanical thread rolling board, self-tapping thread rolling board, etc.).
Bolt trimming die first use the head die to punch out the head shape of the screw, and then use the thread rolling plate, that is, the tooth plate, to roll out the thread!
Bolt trimming die manufacturers tell you that the selection of the head die is very important, the main life depends on the quality of the tungsten steel inside, the use of authentic spring tungsten steel can effectively guarantee the life, and the rolling plate must have extremely high hardness and wear resistance. , Sufficient strength, certain impact force, strong fatigue resistance The hardness of the working part is 59 ~ 2HRC, if >62HRC is easy to chip, <59HRC is easy to wear; quenched martensite <3 grade; Bolt trimming die manufacturers tell you to work There should be no decarburization and low hardness on the surface; there should be no defects such as cracks, nicks, rust and grinding burns on the surface of the thread rolling plate that affect the performance.