Cutting – Means to drive or to guide tool – With simple rectilinear reciprocating motion only
Patent
1975-07-28
1977-01-18
Abercrombie, Willie G.
Cutting
Means to drive or to guide tool
With simple rectilinear reciprocating motion only
83140, 83698, 308 4C, 308 6B, B26D 700, F16C 1900
Patent
active
040032833
ABSTRACT:
Disclosed herein is a die set in which the punch holder is guided for reciprocating movement towards and away from the die shoe by two-part leader pins, with the upper leader pin portions fixed to the punch holder and the lower leader pin portions fixed to the die shoe. Tapered surfaces on the upper leader pin portions are received in ball bearing cages located within sleeves on the lower leader pin portions to guide the movement of the punch holder. The tapered leader pin portions press the bearing balls into the sleeve to provide a tight shearing fit with no tolerance which minimizes deflection of the punch holder to provide more accurate punching.
REFERENCES:
patent: 2823960 (1958-02-01), Blazek et al.
patent: 2906563 (1959-09-01), Conner
patent: 3357755 (1967-12-01), Danly
patent: 3568555 (1971-03-01), Stroh
patent: 3742797 (1973-07-01), Vecchi
Abercrombie Willie G.
Fuller Henry C.
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