制造拖拉机单法兰和双法兰覆带滚轮的一种众所周知的方法,是把两个纵向分开的半轮对焊在一起。锻件呈半轮形,为便于焊接,每一半轮的端部经机械加工出焊缝剖口,然后把两个半轮焊为一体,接着作消除应力处理,进行焊接及机械精加工。 A well-known method of making tractor single-flange and double-flanged rollers is that the two longitudinally spaced half-wheels are butt-welded together. The forgings are half-round and, for the convenience of welding, the ends of each half-round are machined with a weld split and then welded together for two half-rounds, followed by stress relief, welding and mechanical finishing.