The ring groove on the wire die is caused by the metal wire encountering resistance as it enters the die hole and experiences periodic pressure from the vibration during the stretching process. These factors contribute to the fatigue failure of the wire die.
When the die ring groove appears on the drawing die, it leads to increased wear of the die hole. The reason is because loosening of the core material in the ring groove results in small particles that act like abrasives and wear down both the working area and sizing area. Furthermore, as metal wire passes through the die hole, it causes additional friction that further intensifies wear and raises the temperature. This process can result in greater wear and tear on the die hole, similar to that caused by a die rod entering the hole. It is important to be aware of these issues and take steps to minimize wear in order to maintain the performance and longevity of the drawing die.
In the drawing process, the wear of the drawing die can be classified into three main stages. Initially, the die hole surface experiences sharp-point wear. Following this, there is a phase of wear characterized by a low and steady rate. Finally, the wear grooves start to appear on the die hole surface, leading to a stage of high-speed wear.