Spike harrow tooth and method of manufacture
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United States of America Patent
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-
Jun 7, 1988
Grant Date -
N/A
app pub date -
Apr 7, 1986
filing date -
Apr 7, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spike harrow tooth is fabricated by cold forming a metal blank which is provided from appropriate bar stock, the blank having a length for a single harrow tooth. The blank is placed in a first press, oriented with opposite edges of the square configuration aligned in the direction of press closing and opening. The first press is equipped with dies for displacing the metal at one end of the blank, by flattening the opposite edges to thereby displace the metal crosswise and form an enlarged head. Simultaneously, metal is displaced by dies in the first press from opposite side edges of the blank at the other end of the blank for partially forming a point with outwardly bulging excess portions. The partially formed blank then is placed in a second press equipped with dies for removing the outwardly bulging excess portions into waste chips.
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