| 摘要 |
A tool body is cold formed by inserting a blank into a die which defines a portion of the outer surface of the tool body after which a punch applies an impact to the blank causing the outer surface of the blank to conform to the contour defined by the die. The tool body has a tapered forward end, a central radial flange and a rearward cylindrical shank. To cold forge a fixed diameter in the central flange of the tool the forging die has a cylindrical portion having an inner diameter equal to the desired diameter of the flange, the die having an end to allow overfill to be released forward of the fixed diameter portion. Also, a shoulder is formed between the cylindrical shank and a frustoconical portion between the shank and rear surface of the flange. Finally, the shank has an elongate cylindrical hub to facilitate alignment of the tool.
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