Cutting – Interrelated tool actuating means and means to actuate work... – Work clamp
Patent
1981-08-03
1984-05-01
Meister, James M.
Cutting
Interrelated tool actuating means and means to actuate work...
Work clamp
83453, 83461, 83466, 83563, 83694, B23D 1504, B23D 3500
Patent
active
044454104
ABSTRACT:
A method and apparatus for clamping a bar to be sheared, shearing the bar, and transmitting the shearing forces is disclosed. An infeed clamping assembly and moving shear blade assembly are retained within a housing formed from a plurality of retainer plates which are disposed between and connected to a pair of bolsters with keys inserted and interfitted into aligned key cavities in the retainer plates and bolsters. An infeed clamp assembly is provided with an infeed clamp adapted to be pivoted on a support block as the support block and clamp are moved against a bar to accommodate variation in bar cross section along the length of the bar. A rectangular cage having an interior guideway is provided to receive the portion of the bar to be sheared off. A backing clamp is carried by, and slidably movable within, the cage. The backing clamp is wedged against one side of the bar portion to be sheared off until the other side of the bar is engaged by a part of the cage. The entire cage and backing clamp is then forced by a ram to shear the bar. The housing is sufficiently sturdy to resist the spreading forces during shearing in spite of being essentially open sided so that the slab-like shearing assemblies can be removed easily through the open side for replacement and shop-servicing. The shearing blades and backing clamp are inserts, so that they alone may be easily replaced when no other servicing is needed. Actuating mechanism for the holding clamp lies between a retaining wall adjacent the open side and a U-shaped retaining wall block spaced from it.
REFERENCES:
patent: 2644520 (1953-07-01), Nelson
patent: 3039344 (1962-06-01), Hercik
patent: 3451298 (1969-06-01), Schaming
patent: 3460423 (1969-08-01), Hayashi
patent: 3908496 (1975-09-01), Moelbert
patent: 3972257 (1976-08-01), Lazar, Jr.
patent: 4236430 (1980-12-01), Hitt
Lazar, Jr. John D.
Shvartsman Benyamin
Bemcor, Inc.
Meister James M.
Robertson Louis
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