| 摘要 |
A welding stud (10) designed to have reduced weight without loss of strength by having a stepped diameter, cylindrical form shank with a relatively thin head (14). The head is centrally depressed (24) and the shank (12) is of a first relatively large diameter (D2) closely adjacent the head and is extruded to a smaller diameter (D1) from there to the end opposite the head. The weight is additionally reduced by providing the head with a central depression (24) which extends into the head from the axial outer end. The method of forming the stud starts with a workpiece of a diameter larger than the final desired stud diameter and cold heading the workpiece to form the stud head. Thereafter, the shank (12) of the workpiece from a point spaced from the head to the free end of the shank is extruded through a circular die to reduce its diameter to the desired final diameter throughout the majority of its length. |
