Basic Knowledge Of Drawing Dies

The reason for the ring groove: it is due to the resistance of the metal wire entering the die hole when the cross section changes, and the periodic pressure generated by the vibration of the metal wire during the stretching process, which leads to the fatigue failure of the wire die.

The appearance of the die ring groove increases the wear of the die hole. Because after the ring groove appears in the die hole of the drawing die, the small particles of core material peeled off due to loosening on the ring groove grind the working area and the sizing area like an abrasive. The metal wire entering the die hole will aggravate the wear of the die hole like a die rod. At this time, the friction between the die hole and the metal wire increases, resulting in high temperature, which intensifies the wear process.

Generally speaking, the wear of the drawing die during the drawing process can be divided into three stages. The first is the sharp-point wear stage of the die hole surface, the second is a low and stable rate wear stage, and the third is the high-speed wear stage with the appearance of the wear grooves on the die hole surface.