| 摘要 |
A method of producing a header tank of a heat exchanger for forming a header tank (4) having a round tubular shape by rolling up a flat sheet-like blank (4A), which comprises transferring the blank at a predetermined pitch in a longitudinal direction, sequentially forming tube insertion holes (5) in the blank so transferred, sequentially shaping the flat sheet-like blank into a curved surface simultaneously with, or after, the formation of the tube insertion holes, and thus shaping the round tubular header tank (4). An apparatus for producing a header tank of a heat exchanger for forming a header tank (4) having a round tubular shape by rolling up a flat sheet-like blank (4A), which comprises a step of transferring the blank in a predetermined pitch in a longitudinal direction, and a continuous press step or a roll molding step in which various bending dies are continuously disposed in the transferring direction, so as to form tube insertion holes (5) and to sequentially shape the flat sheet-like blank (4) so transferred into a curved surface. Accordingly, the present invention can eliminate the waste of the blank, can reduce the number of dies and can also reduce the cost of production of the header tank of the heat exchanger.
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