B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
26/147
B21D 13/02 (2006.01) B21D 26/06 (2006.01) B21D 53/02 (2006.01)
Patent
CA 1148339
Abstract Method And Apparatus For Flattening Corrugated Heat Exchanger Plates A method and apparatus (32) is provided for crushing a portion of a corrugated sheet (10) in an area (20, 22) extending transversely to the cor- rugations in the sheet without blocking the passages (14) between the crowns(12) of the uncrushed portions of the corrugated sheet (10). In accordance with the method, spacing members (58-66 and 78-88) are inserted into each of the passages (14) on either side of a ridge (12) to be crushed, and the ridge (12) between the spacing members (58-66 and 78-88) is crushed before the spacing members (58-66 and 78-88) are withdrawn. The apparatus for crushing the sheet (10) includes opposed die members (34, 36), each having a plurality of blades (58-66 and 78-88) spaced by slots (68-76 and 90-98). The slots (68-76 and 90-98) in each die member (34, 36) progres- sively decrease in depth and are positioned to receive the blades (58-66 and 78-88) of the opposed die member. A control circuit (46) causes the die members (34, 36) to engage each time a passage (14) in the cor- rugated sheet (10) is aligned with a blade (58-66 and 78-88) in a die member (34, 36).
358989
Caterpillar Tractor Co.
Kirby Eades Gale Baker
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