| 摘要 |
A manufacturing method of studs, which clears a defective feeding problem during automatic inserting of studs into a main chassis, prevents the studs from being separated from holes in the main chassis or the studs from being defectively inserted into the holes, and prevents a mold from being damaged in a main chassis press cauking process, is provided. In a subsequent process of manufacturing a finished product after manufacturing a semi-finished stud product(10) in a press mold by deep drawing process, a manufacturing method of studs is characterized in that the studs are manufactured by a groove-continuous multi net shaping process comprising: a first process of performing bottom edge forming on an upper side of a flange(11) of the semi-finished stud product to maintain thickness accuracy and squareness of the flange; a second process of performing top edge forming on an upper portion of the flange of the semi-finished stud product passing through the first process to maintain vertical width accuracy and of a groove(12) and parallelism of the groove with a flange surface; a third process of performing shallow forming to complete a depth tolerance and a shape tolerance of the groove formed by the second process; and a fourth process of performing fixed shape forming on the groove formed by the third process to improve the dimensions and shape tolerance of the groove and completeness of the flange part.
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