Metal deforming – By use of non-deforming work-gripping clamp and relatively... – With interrelated clamp closer and tool mover
Patent
1975-10-24
1977-03-29
Weidenfeld, Gil
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
With interrelated clamp closer and tool mover
72DIG21, B21D 2502
Patent
active
040142000
ABSTRACT:
A machine for forming a reversely bent cleat edge on sheet metal includes a frame having a horizontal plate-like anvil provided with a free edge, and the anvil supports the sheet metal with a portion of it projected beyond the free edge. A deforming beam is moved by an eccentric shaft, and when so moved the forward end of the beam passes downwardly and engages the portion of the sheet metal projecting beyond the edge so as to bend that portion downwardly. Further rotation of the eccentric shaft causes the beam to move forwardly underneath the anvil and thereby turns the bent portion of sheet metal beneath the anvil so as to create the reversely bent cleat edge. As the beam bends the sheet metal, a hold down mechanism clamps the sheet metal against the anvil, and the hold down mechanism is held in its clamping position by cams which turn with the eccentric shaft. A gauging mechanism is located beneath the beam to position the sheet metal on the anvil with the proper amount thereof projected beyond the free edge. The gauging mechanism does not obstruct disengagement of the duct from the machine, and in fact assists in disengaging the cleat edge from the anvil once the cleat edge is formed.
REFERENCES:
patent: 2722858 (1955-11-01), Oyen
patent: 2973796 (1961-03-01), Engel et al.
patent: 3350912 (1967-11-01), Smith, Jr.
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