Patent ID: 6757974
Filing Date: 2004-07-06
Classification: B21C,B21D,B60K,Y10T

Abstract:
A method of producing a fuel inlet having a mouthpiece portion for receiving a fuel feeding nozzle and a regular portion adjoining said mouthpiece portion for guiding supplied fuel to a fuel tank, the method comprising the steps of:forming a blank pipe by joining two pipes having different thicknesses; placing said blank pipe in two outer dies, each outer die having a mouthpiece portion forming part for forming said mouthpiece portion and a regular portion forming part for forming said regular portion; inserting an inner die into said blank pipe, the inner die having an area with a diameter larger than a diameter of said mouthpiece portion and another area having a diameter smaller than a diameter of said regular portion; pressing said outer dies toward each other; forming said mouthpiece portion from said blank pipe having a larger thickness while forming a cap attachment portion by expanding part of said pipe having the larger thickness; and forming said regular portion from said blank pipe having a smaller thickness while forming a relatively small diameter portion by narrowing part of said pipe having the smaller thickness.