Changes

Jump to: navigation, search

Stamped Contact Parts

No change in size, 15:43, 22 January 2014
Types of Stamped Parts
=== Types of Stamped Parts===
Stamped parts are produced as single pieces, in pre-stamped strip and combconfigurations. Depending on the requirements and application the contact andbase material as well as the coating and attachment technology is carefullyselected.
*Coated stamped parts
Stamped parts can be selectively or completely coated with precious metalcontaining materials based on gold, palladium, and silver as well asnon-precious materials such as tin, nickel and copper ''(Fig. 3.17)''. For stampedparts in high volumes like those used as electrical components in automobilesthe carrier material is mostly coated in a reel-to-reel process starting with eithersolid or pre-stamped strips (see also chapter 7.1.1.3). Frequently the prestampedstrip will be used directly in further automated assembly of the finishedfunctional component. As an alternative finished stamped parts can beelectroplated using barrel and rack plating methods.
Very thin coating layers with tight tolerances are deposited by electroplating. Formany applications the high mechanical wear resistance is advantageous. Sinceeven very thin layers are mostly pore-free, these coatings also act as aneffective corrosion inhibitor. The type of coatings, the sequence of multiplelayers, and the coating thickness, for example for connectors, are chosenaccording to the requirements for the end application.
*Clad stamped parts
For many applications thicker precious metal surfaces or AlSi layers arenecessary. These cannot be deposited by electroplating. Besides meltmetallurgicallyproduced materials on the basis of gold, palladium and silver,also powder-metallurgical materials are required frequently. The metallurgicalbond between these contact materials and the mostly copper based substratesis achieved through various mechanical cladding methods (see also chapter3.2.1). In this way also aluminum clad strips are manufactured in which thealuminum layer serves as the bondable surface in the interface betweenelectromechanical connections and electronic circuits. These clad semifinishedmaterials can be further fabricated into pre-stamped strips, in combform, or single stamped parts ''(Fig. 3.18)''.

Navigation menu

Powered by