Method and apparatus for flattening corrugated heat exchanger pl

Details Method and apparatus for flattening corrugated heat exchanger pl Method and apparatus for flattening corrugated heat exchanger pl

1982-03-03

1984-03-06

Larson, Lowell A.

Metal deforming

With use of control means energized in response to activator...

Including plural sensors or sensor responsive to comparison...

72414, 72385, 226 45, B21D 5304

Patent

active

044346379

ABSTRACT:
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 corrugations 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ridge (12) between the spacing members (58-66 and 78-88) is crushed before the spacing members (58-66 and 78-88) are withdrawn.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) progressively 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 corrugated sheet (10) is aligned with a blade (58-66 and 78-88) in a die member (34, 36).

REFERENCES:
patent: 1462475 (1923-07-01), Atkinson
patent: 2948325 (1960-08-01), Welindt
patent: 3161221 (1964-12-01), Taylor
patent: 3605465 (1971-09-01), Timmerbeil et al.
patent: 4022050 (1977-05-01), Davis et al.
patent: 4109503 (1978-08-01), Francon et al.
patent: 4135420 (1979-01-01), Maus et al.

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