NOBLE METAL TIP FOR SPARK PLUG ELECTRODE AND METHOD OF MAKING SAME

摘要

A noble metal tip (20) for attachment to a spark plug center electrode (36) and/or a ground electrode. Noble metal tip (20) is a generally cylindrical component that includes a firing end (40), an attachment end (42), and one or more retention features (44, 46 and 60, 62). The retention features are generally conically shaped holes or recesses formed in the side of the noble metal tip, and are designed to receive molten material during a laser attachment process. Once the molten material has solidified in the retention features, a fusion layer is formed and acts as a mechanical bond or interlock between the noble metal tip and the electrode. Methods of manufacturing and attaching the noble metal tips are also provided.