| 摘要 |
1347047 Making bushings; welding by pressure CATERPILLAR TRACTOR CO 20 May 1971 [8 June 1970] 16110/71 Headings B3A and B3R [Also in Division F2] A flanged bi-metallic bushing is made by inertia friction welding a flange 24 to a sleeve 22, both of which preferably consist of a sintered bronze bearing layer 30, 40 backed by a steel layer 28, 36. The sleeve 22 is made from a flat strip. After the welding operation, any flash produced is removed by machining. In another embodiment (Fig. 5, not shown) a small portion of the bronze layer 30 is removed from the end of the sleeve 22 prior to the welding operation. |
