FIELD: plastic working of metals, possibly manufacture of rod articles with head, for example bolts for fastenings of railway roads.
SUBSTANCE: method comprises steps of shaping blank of article head and then trimming it; forming lateral surface of head blank with use of punch and die at creating fins; before trimming operation finally forming at least part of lateral surface of head adjacent to its end surface. Trimming is realized when head rests upon trimming die by fin surface at side of supporting surface and (or) by lateral surface of head at side of supporting surface.
EFFECT: lowered metal consumption, improved quality of article, enhanced strength of technological fitting.
3 cl, 10 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF TRIMMING ARTICLES | 1993 |
|
RU2041763C1 |
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SU1389923A1 |
