Trim press having hammer drive for punch

Details Trim press having hammer drive for punch Trim press having hammer drive for punch

1980-02-20

1982-01-12

Meister, James M.

Cutting

Means to drive or to guide tool

With means providing for plural steps in tool stroke

83586, 83617, B26D 508

Patent

active

043099297

ABSTRACT:
A trim press employs a hammer assembly to deliver a hammer blow to the punch of the press at the moment the punch begins to apply shearing pressure to material being trimmed. A spring system applies a steadily increasing spring loading to the hammer as the punch carrying platen moves downwardly in its operating stroke toward the die. A latch assembly, triggered by an abutment on the die, unlatches the hammer at the time the punch engages the material so that the downward velocity of the punch due to the downward movement of the platen is increased by a hammer blow as the punch moves through the material being trimmed. The spring system is operable to restore the hammer to its latched position during the upward stroke of the platen.

REFERENCES:
patent: 1485961 (1924-03-01), Clarke
patent: 2343073 (1944-02-01), Morin
patent: 2470561 (1949-05-01), Hunter
patent: 2602507 (1952-07-01), Adams
patent: 3906828 (1975-09-01), Suzukie
patent: 4245493 (1981-01-01), Lindell

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