Abstract:
To join an aluminum containing first part to a second part, the second part is coated with a soldering alloy melting at a temperature lower than 320*C, the first part and the second part are assembled and the assembly is subjected to an organic flux containing a metal fluoborate reducible by aluminum at a temperature lower than 320*C. The fluxed assembly is then heated to melting point of the soldering alloy.
Abstract:
A heat exchanger comprises at least one tube containing at least one flow directing turbulence member disposed longitudinally therein and comprising a thin metal strip having at least one row of longitudinally spaced wings struck angularly therefrom and extending in the same direction longitudinally, said wings each having an aperture therein and being disposed at an obtuse angle alternately on opposite sides of the strip and resiliently engaging the inner wall of the tube.
Abstract:
A process for producing a corrugated heat exchanger dissipator for a tube and dissipator core, comprises forming in an elongate metal sheet material a plurality of longitudinally spaced sets of longitudinally extending slots with the slots of successive sets longitudinally aligned to form a plurality of parallel straps with the straps of successive sets in alignment, bending the straps of each set and the corresponding straps of successive sets alternately in opposite directions relative to the plane of the sheet, and bending the solid areas between the sets transversely in alternate opposite directions to corrugate the sheet and interfit the straps of adjacent sets.
Abstract:
The apparatus is made of aluminium containing parts with a silicon and magnesium content able to form a Mg2Si compound. The assembled apparatus coated with a brazing alloy is heated up to 580*C to 600*C and then quickly cooled.
Abstract:
Process for brazing stainless steel parts to parts of aluminum and aluminum alloys in which the steel parts are pickled in an aqueous bath, then dipped in a flux bath containing a salt of zinc and dried in a stove, the steel parts thus coated are then brazed to said parts of aluminum by usual technics.
Abstract:
A method of securing two aluminum parts, one within the other, comprising deforming the material of one part in the area to be secured to the other part to create groove spaced protrusions extending beyond the normal boundary of the engaging area of the other part, pressing said parts together to engage said protrusions with the boundary of the other part with sufficient friction to retain said parts in position, and then submitting said engaged parts to brazing operation, the protrusions being partly compressed and deformed into the grooves so as to provide passages permitting flow, by capillary action, of liquid brazing alloy thereto.
Abstract:
The process for the connection by crimping of collectors on water-boxes of heat exchangers is characterized in that parts of the collector and the water-box are surrounded by an electrically conductive metallic belt which is then submitted to at least one high electromagnetic pulse.
Abstract:
The method for brazing aluminum radiators with brazing alloys comprises the steps of suspending said radiators and continuously displacing them through successive portions of a single lengthwise elongated furnace cavity with rear and front surfaces of said radiators directed at right angles with respect to successive streams of hot gas blown into each of said successive portions of said furnace at different temperatures and in adjacent relationship therebetween. This disclosure relates to a novel method for brazing radiator cores all the parts thereof being made of aluminum or alluminum alloys and a part at least thereof being plated with a brazing alloy.
Abstract:
A furnace for the continuous brazing of aluminum work parts comprising a set of at least 4 adjacent communicating treatment chambers through which the parts to be brazed are successively passed, the chambers being provided with heating means, blowers and vents for circulating hot gas therethrough so as to maintain in the chambers successively higher temperatures and pressures to achieve proper brazing which takes place in the fourth chamber. Additional chambers may be provided for curing and cooling purposes.