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专利名称：METHOD OF MANUFACTURING A PIPE
COUPLING COMPONENT, METHOD OFMANUFACTURING A CASING STRUCTURALMEMBER, AND PIPE COUPLING STRUCTUREFOR A HOLLOW PART
发明人：UNENO, DAISUKE申请号：EP09712336申请日：20090217公开号：EP2260957A4公开日：20140226
摘要：In a first step of this method, a first intermediate product 42 having a couplingportion forming portion 16d and flat portions 21 is produced. In a second step, there isproduced a second intermediate product 44 which is larger in the bending depth of thecoupling portion forming portion 16d and is smaller in width of the flat portions 21 thanthe first intermediate product 42. In a third step, a third intermediate product 36 havingthe coupling portion forming portion 16d, sloping flat portions 34, and narrow flatportions 35 is produced. In a fourth step, the sloping flat portions 34 of the thirdintermediate product 36 are pressed obliquely upward so as to cause the material tomove to the boundaries between the sloping flat portions 35 and the side walls of thecoupling portion forming portion 16d, to thereby produce a fourth intermediate product37. In a fifth step, the side walls of the coupling portion forming portion 16d, the slopingflat portions 34 and the narrow flat portions 35 of the fourth intermediate product 37are pressed from the upper and lower sides, to thereby form a fifth intermediate
product 39 in which burrs 38 are formed at the opening-side end portions of the sidewalls of the coupling portion forming portion 16d. In a sixth step, the burrs 38 areremoved, whereby a casing structural member 16 produced. This method enablesmanufacture of casing structural members which can prevent leakage of fluid.
申请人：SHOWA DENKO K.K.
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