Good Quality Cold Heading Dies Main Die With Knurlings One Die Two Blow Cold Heading Machine

1. Structural composition:

• Upper punch: Generally located at the top of the die, cold heading mold punching the blank from top to bottom during the stamping process. The shape and size of the upper punch depend on the specific processing part requirements. For example, for some parts with complex shapes, the upper punch may need to be designed into a special shape to ensure the accuracy of the stamping.

• Lower punch: Installed on the workbench of the stamping machine, corresponding to the upper punch. The lower punch is usually provided with a core rod hole and other structures to cooperate with the upper punch to complete the stamping of the blank. Its bottom will be connected to the base, and the base may be provided with special structures such as empty slots to meet the specific functional requirements of the die, such as facilitating the installation of certain movable parts.

• Die body: Fixed between the upper and lower punches, it is the key part of the blank forming. The die body is provided with a die hole, and the upper and lower punches and the core rod are inserted into the die hole during stamping, so that the blank is extruded and formed in the die hole. The structural design of the die body needs to ensure its strength and precision to ensure the normal operation of the die and the quality of the processed parts.

• Core rod assembly (available for some molds): For some molds that need to form specific holes or structures on the blank, a core rod assembly will be equipped. The core rod assembly usually includes a connecting clamp and multiple separate core rods fixed by the connecting clamp. The connecting clamp is installed in the empty slot of the lower punch base, and the core rod is inserted into the core rod hole of the lower punch, tungsten carbide mold which plays the role of forming the internal structure of the blank during the stamping process.