VALVE NOZZLE UTILIZING THEREOF OF PLURAL MEMBER AND ASSEMBLING METHOD FOR FUEL INJECTION CONCENTRIC JOINTING METHOD FOR PRECISION COMPONENT CONSISTING

摘要

PURPOSE:To improve a positioning precision for fellow components and automize assembly, by pressing the vicinity of the fitting part of either of an inner tubular component and an outer tubular component by means of a punch so that a local plastic flow may occur, and uniting both fellow tubular components by the force of the plastic flow. CONSTITUTION:An inner tubular component 12 fits in under a condition in which it is mounted on the bottom of an outer tubular component 10, while a clearance G is secured between the inside diameter of the outer tubular component 10 and the outside diameter of the inner tubular component 12, and a positioning pin 14 is inserted into the through hole 12a of the inner tubular component 12 till its tip butts on the tapered hole 10c of the outer tubular component 10, and the concentric temporally positioning of the inner tubular component 12 and the outer tubular component 10 is conducted. And, a punch 16 is guided movingly along the outer peripheral of the positioning pin 14, and the vicinity A of the fitting part of either of the inner tubular component 12 and the outer tubular component 10 is pressed by means of the punch 16 so that a local plastic flow may occur, and fellow inner tubular component 12 and outer tubular component 10 are united by the force thereof.