How long does it take to cold heading the die?

Does the subject want to ask, "How long does it take to learn cold heading?" Two months. It is not difficult to learn cold heading die, but it requires high skills, so it takes two months to learn. After constant contact, it has achieved the goal of proficiency. Cold heading die is an extrusion process for metal forming. As the name implies, it is to deform metal materials through the movement of molds and machinery at room temperature.