Method of forming fins for a heat exchanger
AssigneeBehr GmbH & Co.
InventorsWerner Helms, Roland Hemminger
Life of this patent
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Abstract
The fin for a heat exchanger which consists essentially of a matrix of tubes and of fins disposed transversely to the latter, the fin having pass-through elements to receive tubes which are to be joined mechanically, while a first, preferably liquid medium flows through the tubes and the fin is acted on by a second, preferably gaseous medium. Multiple fins are positioned in their fin pitch by integral spacers, wherein the spacers are in the form of noses stamped out of the pass-through elements and distributed over the periphery of the latter.
Claims10
A process for the production of pass-through elements for a fin, the process comprising the steps of:
- a) punching pass-through openings in a plane fin sheet and forming a plurality of tabs around each of the pass-through openings,
- b) stamping convex surface protrusions having a pyramidal shape in the tabs by a stamping punch pressing in a pass-through direction,
- c) drawing in and tilting, by a punch and a die, the tabs provided with each of the stamped convex surface protrusions, and
- d) forming a collar together with the tabs for each of the convex surface protrusions.
A process for the production of pass-through elements for a fin for a heat exchanger, the heat exchanger including a matrix of tubes and of fins disposed transversely to the tubes, said fin comprising:
- pass-through elements to receive the tubes to be joined mechanically, while a first medium flows through the tubes and the fin is acted on by a second medium;
- and
- a plurality of integral spacers for positioning an adjacent fin in a fin pitch;
- wherein the integral spacers are in a form of convex surface protrusions stamped out of the pass-through elements and distributed over a periphery of the pass-through elements, the process comprising the steps of:
- a) punching pass-through openings in a plane fin sheet and forming a plurality of tabs around each of the pass-through openings;
- b) forming a pass-through element, including a collar together with the tabs, into a cylindrical shape;
- and
- c) impressing convex surface protrusions having a pyramidal shape on the tabs by a stamping punch traveling from above into a free end of the pass-through element.
Dependencies are inferred from the claim text.