Cutting – Tool or tool with support – Cutting couple type
Patent
1982-06-07
1984-11-13
Schran, Donald R.
Cutting
Tool or tool with support
Cutting couple type
83692, B26D 314
Patent
active
044818483
ABSTRACT:
An improved corner shear machine including a recess which extends toward a ram across a table so that a tool assembly unit comprising a combination of a punch and a die is removably fitted into the recess. The die is firmly included in a die block and the punch is fixedly secured to a punch block, whereas the punch block is vertically displaceable toward or away from the die block with the aid of a pair of symmetrically located guide pins which stand from the latter at the rear part thereof. To allow the punch to resume the original position after completion of a shearing operation a resilient means is arranged in a suitable position in the tool assembly unit, and moreover to prevent a workpiece in the form of a sheet material from being raised up together with the punch after completion of the shearing operation a plurality of symmetrically located resilient means with stopper means fixedly secured to the lower end thereof are suspended from the punch block. A sub-table is additionally fitted into the recess in front of the tool assembly unit so that the whole recess is filled with the sub-table and the tool assembly unit.
REFERENCES:
patent: 2423423 (1947-07-01), Feitl
patent: 3180196 (1965-04-01), Coulon et al.
patent: 3405583 (1968-10-01), Herzog
Schran Donald R.
Takeda Machinery Works Company, Ltd.
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