Behr Gmbh & Co.

Mahle International Gmbh

Behr Gmbh Co. Kg

Mahle Behr Gmbh & Co. Kg

Roland Hemminger

Werner Helms

Walter Wolf

Herbert Damsohn

Mark Schienemann

Wolfgang Reier

Daniel Hendrix

Volker Kurz

Dieter Bauer

Spasoje Ignjatovic

Viorel Braic

Erwin Skiba

Ralf Bochert

Roland Schirrmacher

Herbert Hunzelmann

Danijel Budimir

Jochen Kaeser

Dipl-Ing Werner Helms

Jochen Käser

A heat exchanger for an exchange of heat between a first fluid and a second fluid includes a block including: a plurality of flow ducts configured to be traversed by the first fluid, and a housing that holds the flow ducts and is configured to be traversed by the second fluid; a base connected to the block, the base including one or more passage openings for the flow ducts, the base comprising a first base part and a second base part; and at least one casing cover that is in fluid-communication with the flow ducts and that is attached to the base.

Heat exchanger

A heat exchanger, particularly for charge air or exhaust gas, performs heat exchange between a first fluid and a second fluid, and includes heat exchanging guides for the first and second fluids, the guides being separated from each other in a core, the core having a plurality of flow channels through which the first fluid flows, and a housing that receives the flow channels and through which the second fluid flows. The heat exchanger also includes at least one compartment lid, which is flow-connected to the flow channels, and a base that is attached to the compartment lid and that is equipped with one or more passage openings for flow channels. The compartment lid is attached to the base via one or more connections which connections are bolted connections and/or a slotted crimping.

Specified is a heat exchanger for an exchange of heat between a first fluid, in particular charge air or an exhaust gas, and a second fluid, in particular a coolant, having a block for the separate and heat-exchanging guidance of the first and second fluids, which block has a number of flow ducts which can be traversed by the first fluid and a housing which holds the flow ducts and which can be traversed by the second fluid, at least one casing cover which is flow-connected to the flow ducts, a base which is fixed to the casing cover and which is provided with one or with a plurality of passage openings for the flow ducts, wherein the base is composed of at least one first base part and a second base part.

A method and a device for the draw expansion of metal tubes of oval cross-section uses expansion elements drawn unidirectionally through metal tubes by means of draw elements. The expansion elements are fastened to the draw elements by suspension devices which have a hammer-like contour. The draw elements are preferably made of a rod-shaped material. An apparatus of the invention is an apparatus for mechanically expanding metallic tubes, in particular tubes in heat exchangers. Each individual tube to be expanded is held in at least one holding device and passed through by a drawing mandrel with an expanding element. To prevent jamming of the expanding element in one of the holding devices, the holding devices are provided with lateral guides which are resiliently compliant outward in the radial direction. When the expanding element passes through the metallic tube, the tube is expanded in the radial direction. The forces occurring thereby in the axial direction are absorbed by the holding device, since the tube is seated on a stop in the holding device.

Method and device for expanding metal tubes

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.

Method of forming fins for a heat exchanger

A heat exchanger, produced by the insertion of welded pipes into a rib pack, has a good connection between the rib pack and the pipes after expansion of the pipes. An optimal contact of the pipes against the passages in the cooling fins of the rib pack is achieved because the weld base of the welded pipe lies in a recess. The recess is formed by reduction of the wall thickness of a strip material from which the welded pipe is produced.

Heat exchanger having a welded pipe which has a reduced wall thickness

Fin for a heat exchanger

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Esslingen, Germany

Roland Hemminger