Metal deforming – By use of non-deforming work-gripping clamp and relatively... – With interrelated clamp closer and tool mover
Patent
1976-02-19
1976-11-30
Mehr, Milton S.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
With interrelated clamp closer and tool mover
72319, B21D 504, B21D 1120
Patent
active
039941523
ABSTRACT:
A cleat edge bending machine has an anvil provided with a free edge and two rotating wiper bars, the first of which is located directly beyond the free edge of the anvil, while the second is located below the anvil. The first bar has a gauging segment and a bending segment which follows the gauging segment insofar as the direction of rotation is concerned. The radius of the gauging segment increases toward the bending segment, and the bending segment has an abrupt increase in radius immediately beyond the gauging segment. A duct section on which a cleat edge is to be formed is placed upon the anvil and the bottom wall of the duct section is moved against the gauging segment on the first wiper bar. The bars are then rotated and as the first bar rotates, the duct section is forced backwardly, owing to the increase in radius of the gauging segment. The bending portion thereupon strikes the wall and bends its end 90.degree. across the free edge of the anvil. Thereafter, the second wiper bar strikes the bent portion of the wall and bends it another 90.degree., creating a fully formed cleat edge at the end of the wall. Upon return of the bars to their rest position, the cleat edge is easily disengaged from the anvil and removed from the machine since the width of the cleat edge is less than the spacing between the free edge of the anvil and the gauging segment of the first bar.
REFERENCES:
patent: 2973796 (1961-03-01), Engel et al.
patent: 3948074 (1976-04-01), Stalzer
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