| 摘要 |
1,248,108. Making torque converters; brazing. NISSAN MOTOR CO. Ltd. 30 Oct., 1969 [16 Nov., 1968], No. 53285/69. Headings B3A and B3R. [Also in Division F2] A method of securing vanes to the impeller or turbine of a torque converter comprises forming vanes 10 with flanges 10a, 10b extending in the same direction, the vanes being slightly curved in cross-section, temporarily connecting the flanges 10a to a core structure 11, forcing the vanes into the shell structure 12 of the impeller or turbine until the vane flanges are securely positioned therein, placing brazing material pieces 13c, 13d between the vane flanges and the core and shell structures and heating the assembly to above the melting point of the brazing material. The vanes 10 are made by pressing and the flanges 10a are spot-welded to the core 11 at P. The curvature (8) of the vanes, Fig. 2a. (not shown) provides the necessary resilience to hold them in the shell 12 prior to brazing. Copper brazing material, in the form of rings 13a, 13b in addition to the pieces 13c, 13d, are inserted in the assembly, which is then placed on a conveyer 22. The assembly is then passed through a furnace 20 having an inlet 25 for a reducing gas and movable partition walls 26, 26<SP>1</SP>. The furnace provides a controlled temperature rise of the assembly to 1110-1130‹ C. in 18 minutes, maintenance thereat for 10 minutes and controlled cooling in a water-cooled tube 24 for 54 minutes, Fig. 4 (not shown). |
