The design parameters of the terminal generally refer to the parameters of the crimping part, mainly referring to the inner and outer diameters of the terminal, joint length, depth, number and arrangement of dents.
① Inner diameter and outer diameter. The inner and outer diameters of the terminal determine the thickness of the terminal. The smaller the bend radius, the greater the relative elongation of the outer metal. When the relative elongation of the outer metal reaches the ultimate elongation of the material, that is, the bending radius reaches the minimum value, the material will produce bending cracks. The choice of terminal thickness depends on the wire diameter of the crimped wire.
②Engagement length.
The influence of the engagement length on the pull-off force of the terminal: the longer the engagement length, the larger the contact area between the terminal and the wire. In the case of the same degree of crimping, the stronger the contact between the terminal and the wire, the greater the pull-off force.
The influence of the engagement length on the contact resistance of the terminal: the longer the engagement length, the larger the contact area between the terminal and the wire, and the smaller the contact resistance of the crimped terminal under the same degree of crimping.
③ Depth, number and arrangement of dents
The inner surface of the crimp portion of the terminal is often indented, which is a way to increase the mechanical and electrical performance of the terminal. However, the depth, number and arrangement of the indents have different effects on the performance of the terminal.