Yiming-Essebi Machine Series Center

The machine has four stations, each equipped with a dedicated die set.

Each station performs a specific forming operation, allowing for progressive shaping of the workpiece.

First Blow (Station 1): Initial rough shaping or pre-forming of the raw material (e.g., cutting the wire to length and forming a basic shape).

Second Blow (Station 2): Intermediate shaping, such as extruding or upsetting to add more detail.

Third Blow (Station 3): Further refinement, including adding threads, head shapes, or other intricate features.

Fourth Blow (Station 4): Final forming, ensuring the part meets precise dimensional and surface finish requirements.

The multi-stage process allows for the production of complex geometries that would be difficult or impossible to achieve in a single operation.

Parts like bolts, screws, rivets, and specialized fasteners can be produced with high accuracy.

The workpiece is automatically transferred between stations using a precision transfer system (e.g., grippers, chutes, or robotic arms).

This ensures seamless movement and minimizes production delays.

The warm heading process heats the raw material to a temperature range of 500°C to 800°C (approximately 932°F to 1472°F).

This temperature range is below the melting point of most metals but high enough to improve ductility and reduce flow stress.

Heating the material reduces its resistance to deformation, allowing it to flow more easily into the die cavities.

This results in better fill-out of complex shapes and minimizes defects like cracking or incomplete forming.

Compared to cold heading, the warm heading process significantly reduces wear on dies and punches.

Lower forces are required to form the material, extending tool life and reducing maintenance costs.

While heating the material consumes energy, the overall process is more efficient than hot forging because lower temperatures are used.

Advanced heating systems, such as induction heaters, provide precise temperature control and rapid heating.

Warm heading produces parts with excellent surface finishes and mechanical properties.

The process avoids issues like scale formation (common in hot forging) while maintaining the strength and integrity of the material.