Automatic die safety lock for a metal stamping die

Details Automatic die safety lock for a metal stamping die Automatic die safety lock for a metal stamping die

1975-08-14

1977-01-25

Lanham, C.W.

Metal deforming

Tool and/or tool holder

83637, B21J 1302

Patent

active

040044483

ABSTRACT:
A locking mechanism is provided for locking the upper and lower portions of a stamping die together when the die is out of press and releasing the upper and lower portions of the stamping die from locking engagement with each other when the stamping die is in press. The mechanism includes an elongated lockbar operatively associated with a spring-biased safety pin and a fixed pivot pin in the upper portion of the stamping die. A vertical leader pin projects upward from the lower portion of the stamping die into a bushing mounted in the upper portion of the stamping die and includes an undercut portion forming a locking surface for cooperative locking and releasing engagement with the lockbar in response to movement of the safety pin which senses whether the stamping die is in press.

REFERENCES:
patent: 2225145 (1940-12-01), Baumbach
patent: 2997969 (1961-08-01), Holmes

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