| 摘要 |
928,025. Making universal joint spiders; welding by pressure; forging. GENERAL MOTORS CORPORATION. March 30, 1962 [June 16, 1961], No. 12284/62. Classes 83 (2) and 83 (4). A method of making a universal joint spider comprises forming on each of two members cylindrical ends having aligned axes to constitute bearing trunnions, placing the members in a pressure tool perpendicular to each other, operating the tool to force the members together until their axes lie in a common plane while the members are in a plastic state caused by heating so as to weld them together. Two identical cylindrical members 14, 16 having machined trunnion bearing and seating diameters 12, 22 and arcuately cross-sectioned central circumferential grooves 24 are positioned in a pressure tool mounted on a platen 26 of a welding tool, Fig. 4. The tool comprises side members 28 having semi-circular positioning grooves 32 for the member 14 and a central member 30 having grooves corresponding to the shape of members 14, 16. Secured to the upper platen 36 of the welding press is an electrode port 38 which engages the member 16 and side ports 40 having semi-circular grooves 42 to suit the diameters 12 of the member 14. Under a load of 18,000 1bs. the two members are forced together, simultaneously a welding current is applied through the port 38 to heat the members to their plastic state and the pressure maintained until the axes 18, 20 of the members are in the same plane after which it is released and the welding current disconnected. The spider 10 is finally ground or cleaned prior to being fitted to a yoke. |
