Adjustable angular shearing device
AssigneeLink S.R.L.
InventorsArthur Peterson, Jerry L. Kozminski
Life of this patent
Estimating the term…
Abstract
An adjustable angular shearing device (10) in accordance with the invention is adapted to transversely shear sheet material from a continuous strip in a punch press. The device (10) has an upper punch (24) which coacts wtih a lower die (28) to shear sheet material passing between them. The punch (24) comprises a pair of members (32, 34) which coact with a pair of corresponding members (74, 76) on a lower die (28). The members rotate about aligned posts (26, 30) at the vertex of an angle. The rotation of the members about each respective post is selectively adjustable. A chevron-shaped part can be stamped from a continuous strip of sheet material by two successive stamps of the punch press.
Claims25
A shearing device for rapidly shearing in succession, polygonal pieces, each having more than four edges, from sheet material which passes through said device, said shearing device comprising:
- an inlet area at one side of the device for feeding sheet material into said device;
- an outlet area at another side of the device opposite from said one side for facilitating the removal of polygonal pieces, said outlet area being generally aligned with said inlet area;
- a lower plate having a first lower plate member and a second lower plate member;
- a first shaft fixed to said lower plate and having a pivot axis, at least one of said first and second lower plate members being pivotally mounted to said first shaft for limited rotation thereabout to form a cutting angle relative to the other of said lower plate members, and each of said lower plate members having a block which defines a cutting edge, the block abutting the first shaft at its pivot axis;
- an upper plate having a first upper plate member and a second upper plate member;
- a second shaft fixed to said upper plate and having a pivot axis coaxial with said first shaft, at least one of said first and second upper plate members being pivotally mounted to said second shaft for limited rotation thereabout, and each of said first and second upper plate members having a block which defines a cutting edge, each block abutting the second shaft at its pivot axis, the cutting edges being disposed to cooperate with each of said first and second lower plate member cutting edges, respectively, in shearing action by moving said upper plate downwardly and upwardly with respect to said lower plate;
- adjusting means to adjust said cutting angle by causing rotation of said at least one of said first and second plate members and first and second upper plate members;
- and
- biasing means to bias said upper plate away from said lower plate whereby polygonal pieces, each having more than four edges can be sheared rapidly and successively when sheet material is passed through the device and the device is operated in a punch press.
In a shearing device for rapidly shearing in succession polygonal pieces from sheet material passing through said shearing device, said device comprising an inlet area at one side of the device for feeding sheet material into said device, an outlet area on another side of said device opposite said one side for facilitating the removal of polygonal pieces, said outlet area being generally aligned with said inlet area, a lower plate and an upper plate between the inlet area and the outlet area, said upper plate spaced from the lower plate and mounted generally parallel thereto for reciprocating movement relative to the lower plate, said lower plate carrying a pair of members each having a block which defines a cutting edge, and said upper plate carrying a pair of members each having a block which defines a cutting edge disposed to cooperate with each of the lower plate member cutting edges, respectively, in shearing action when the upper plate reciprocates relative to the lower plate, the improvement comprising:
- a first pivot defining a pivot axis on the upper plate to which both of the upper plate members are mounted, and about which one of the upper plate members rotates relative to the other;
- and
- a second pivot defining a pivot axis on the lower plate spaced from and coaxial with the first pivot and to which both of the lower plate members are mounted, and about which one of the lower plate members rotates relative to the other of the lower plate members, the blocks abutting the respective first and second pivots at the respective pivot axes whereby sheet material can be sheared from one edge to an opposing edge along two lines which intersect at a point intermediate the opposing edges of the sheet material when the upper plate reciprocates relative to the lower plate and whereby upon successive reciprocation of the upper plate relative to the lower plate, polygonal pieces, each having more than four edges, can be formed.
Dependencies are inferred from the claim text.