Maintains its integrity under cold heading and extrusion of cold heading machines

Cold heading machinemaintains its integrity under cold heading and extrusion.

The development of advanced processing methods. Therefore, how to make full use and improve the plasticity of metals, master the mechanism of metal plastic deformation, and develop scientific and reasonable fastener cold heading processing technology is the purpose and purpose of the research. The basic summary of metal deformation refers to the sum of the relative displacements of the fine particles that make up metals when deformed, withstand external and internal forces while maintaining their integrity.

1. Deformation type

a. Elastic deformation.

Metal deforms under external force

When external force is removed, the original shape and size can be restored. This deformation is called elastic deformation.

Elasticity is measured by the elastic limit and proportional limit.

b. The permanent deformation of plastic deformation metal under external forces refers to deformation that cannot be restored to its original state after removing external forces, but the integrity of the metal itself will not be destroyed, which is called plastic deformation. The mass of plastic is represented by elongation, area reduction and yield limit.

2. Plasticity evaluation method

The mass plasticity of plasticity is represented by elongation, area reduction and yield limit.

In order to evaluate the quality of metal plasticity, a numerical indicator is often used, called the plasticity indicator.