从日、美、联邦德国引进的UH083、MS140-2、R912等推土机和挖掘机,其支重轮总成(结构见图1)是在轮体上直接加工浮封室、尺寸和位置精度的需求都比较高。因此,制定了以下的工艺加工路线:粗加工→焊接→调质→精加工。精加工时浮封室必须加工到图纸要求尺寸,而采用原来的轮体夹具加工的浮封室达不 The bulldozers and excavators such as the UH083, MS140-2, and R912 introduced from Japan, the United States, and the Federal Republic of Germany have a roller assembly (see Figure 1) that directly processes the floating seal chamber, dimensions, and position accuracy on the wheel body. The demand is high. Therefore, the following process routes were developed: roughing → welding → tempering → finishing. The floating seal chamber must be processed to the drawing required size during finishing, and the floating seal chamber processed by the original wheel fixture cannot be used.