Hot stamping forming method and device for high-pressure and high-density fins of plate-fin heat exchanger

Abstract

The invention discloses a hot stamping forming method and device for high-pressure and high-density fins of a plate-fin heat exchanger. As the pitch of the high-pressure and high-density fins is reduced, a stamping tool becomes thinner and thinner, so that the forming force borne by a die and the tool in the cold stamping forming process becomes larger and larger, and the die and the tool are prone to deformation, abrasion and even breakage. The hot stamping forming method for the high-pressure and high-density fins is provided for solving the problem that punching of the high-density and high-pressure fins cannot be completed through a cold stamping technology, the forming lateral force borne by the stamping die is greatly reduced compared with traditional cold stamping, the requirement for the mechanical performance of materials of the die and the tool is lowered, the forming difficulty is lowered, and therefore the fin process technical limit of a high-pressure, high-density and micro-channel plate-fin heat exchanger with large thickness and small fin pitch is broken through. The method comprises the following steps: carrying out solid solution heat preservation treatment on a coated aluminum alloy sheet, rapidly transferring the coated aluminum alloy sheet to a fin forming machine for hot stamping forming, then carrying out rapid quenching, and carrying out artificial aging treatment and cleaning.

Description

technical field [0001] The invention belongs to the technical field of compact heat exchangers and precision machining thereof, and in particular relates to a hot stamping forming method and device for high-pressure and high-density fins. Background technique [0002] Plate-fin heat exchanger is a compact heat exchange device, which has the advantages of high heat transfer efficiency, large heat exchange surface per unit volume, compact structure, and wide temperature range. It is widely used in large-scale petrochemical, coal chemical, and air separation , natural gas liquefaction and iron and steel metallurgy and other industries. [0003] Fins are the core components of plate-fin heat exchangers. Combined molds are often used to form metal aluminum sheets by cold stamping and brazing to form heat exchangers. The design and manufacture of fins affect the performance of plate-fin heat exchangers. key. [0004] In terms of heat transfer, it is usually defined: the micro sc...

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Problems solved by technology

[0010] Aiming at the problem that the above traditional cold stamping technology cannot complete the stamping of high-density and high-pressure fins, the present invention proposes a hot stamping forming method for high-pressure and high-density fins. This process combines stamping forming with aluminum alloy heat treatment process, which is a typical Advanced workpiece forming and forming integration technology not only improves the formability of aluminum alloy, but also ensures the mechanical properties of the material

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