| 摘要 |
1,183,704. Making fuel injection nozzles; drawing. JOSEPH LUCAS (INDUSTRIES) Ltd. 24 Aug., 1967 [12 Sept., 1966], No. 40625/66. Headings B3A and B3P. [Also in Divisions B4 and F1] A method of securing two parts of a fuel injection nozzle together comprises holding the nozzle 14 in engagement with the nozzle body 10 by a flanged sleeve 19 and passing the assembly through a die to reduce the thickness of the sleeve and urge it into gripping engagement with the body. The body and the nozzle have smooth sealing surfaces 11, 15 which are held fluid tight by the sleeve. A valve 16 is provided in the nozzle to control fuel flow from a passage 17 to the nozzle. The assembly is drawn through a die with the movement of the die away from the nozzle tip. The die is preferably of carbide and formed in three segments, Fig. 3 (not shown), which are urged together during the drawing and released afterwards to separate the die and the assembly. The surface of the body 10 may be roughened or grooved to ensure a tight fit. Dimensions of the sleeve before and after drawing are given. |
